Autism spectrum disorder (ASD) affects an estimated 1% of children in the United States and yet many fundamental questions about the biology of ASD, potential risk factors, effective treatments and interventions, and impacts throughout life remain unanswered. Important advances have been made in understanding the complexity of ASD, but additional work is needed to fully understand how biological and external environmental factors contribute to ASD, identify the most effective interventions and services, and improve the quality of life for people with ASD and their families. The IACC Strategic Plan for ASD Research was created with the intent to accelerate and inspire research that will profoundly improve the health and well-being of every person on the autism spectrum across the lifespan.
The Plan provides a blueprint for autism research that is advisory to the Department of Health and Human Services and serves as a basis for partnerships with other agencies and private organizations involved in autism research and services. Under the Combating Autism Act of 2006 (PDF – 49 KB), it must be updated on an annual basis. To this end, the 2011 Plan has been updated by the IACC to reflect important new scientific advances in the field over the past year, emerging areas of opportunity, and areas where more research is necessary. Input from the ASD community, advocacy groups, research funding organizations, and the scientific community has continued to be a critical aspect of the updating process.
"Federal and private investment in autism research has increased markedly in the past two years," said Dr. Thomas Insel, M.D., IACC Chair and Director of the National Institute of Mental Health (NIMH). "At the same time, the IACC has heard from the community about the growing need for research and the importance of new areas for rigorous scientific study. This updated research Strategic Plan builds on recent discoveries and emerging opportunities to identify new areas where science can make a difference for individuals and families with ASD."
The 2011 Plan includes an additional 16 objectives and newly developed addendum sections for each chapter describing what has recently been learned, what gap areas have emerged, and what progress is being made in fulfilling the objectives. The Committee has identified several important new areas of focus, including the need for additional research on the use of alternative and augmentative communication (AAC) to facilitate communication for nonverbal individuals with ASD. The Committee recognized the need for more research to determine which types of AAC are most effective for particular subpopulations and how best to improve access. In addition, the 2011 Plan now calls for studies focusing on health promotion and the prevention of secondary conditions in people with ASD such as injury, obesity, and other co-occurring medical and psychiatric conditions. Also included is a new focus on understanding potential biological causes of wandering/elopement behavior, an issue that was brought to the Committee's attention through compelling public testimony at an IACC meeting in 2010. Throughout the year, the Committee heard and discussed reports of people with ASD being at increased risk for injury or premature death, and recognizing the urgent need to fully understand the reasons for this and how it can be prevented, added a new objective to the Plan exploring a range of issues related to safety and mortality for people on the spectrum.
Notably, over the past year, agencies and organizations represented on the IACC have participated in many successful collaborative efforts that were highlighted by the Committee in this year's edition of the Plan. These public-private partnerships embody the spirit of collaboration described in the Plan's mission statement and are critical to making progress toward understanding ASD and improving the lives of people on the spectrum, as well as the lives of their families.
Two decades ago, autism was a little-known, uncommon disorder. Today, autism is more common in the United States than childhood cancer, juvenile diabetes, and pediatric AIDS combined, and the increasing numbers of children being diagnosed with autism has created a national health emergency. In a speech at the National Institutes of Health on September 30, 2009, President Obama specifically cited autism, along with cancer and heart disease, as one of three health conditions targeted for major scientific research investment through the American Recovery and Reinvestment Act. The President expressed his hope that research into genetic and environmental factors would result in strides in early intervention, treatments, and therapies to help people affected by autism achieve their fullest potential.
Autism is now recognized as a group of syndromes denoted as autism spectrum disorder (ASD). The most recent Centers for Disease Control and Prevention (CDC) prevalence estimates of ASD for children are 1 in 110 (CDC, 2009). These estimates, more than tenfold higher than two decades ago, raise several urgent questions: Why has there been such an increase in prevalence? What can be done to reverse this alarming trend? How can we improve the outcomes of people already affected, including youth and adults?
Approaches to ASD diagnosis have evolved as more has been learned about the disorder. Currently, ASD is diagnosed on a combination of behavioral characteristics of impairment in verbal and nonverbal communication skills and social interactions, and restricted, repetitive, and stereotyped patterns of behavior. These characteristics can range in impact from mild to significantly disabling. Adequately addressing these conditions requires sophisticated educational and therapeutic approaches. Some people with ASD also have a range of medical conditions including, but not limited to: motor and sensory impairments, seizures, immunological and metabolic abnormalities, sleep problems, and gastrointestinal symptoms.
The cost of ASD to affected people, families, and society is enormous. A great majority of adults with ASD struggle with ongoing and mostly unmet needs for employment, housing, services, and supports. Compounding these stressors, families of a child with autism typically lose income, sometimes as a result of one parent leaving the workforce in order to care for and meet the special health and educational needs of the child (Montes & Halterman, 2008). The cost to society of ASD is currently estimated to be $35 billion to $90 billion annually, the higher estimate being comparable to Alzheimer's disease (Ganz, 2007; Knapp, Romeo & Beechum, 2009). Although research on ASD has expanded over the past decade, there remains an urgent need for increased research support.
It is imperative that resources be devoted to research commensurate with the public health need. Specifically, we need research that deepens our understanding of ASD, including the mechanisms by which complex genetic and environmental factors play a role in its causation; development of improved ASD diagnostic approaches and treatments; and science to enhance the level of services and supports available to people with ASD, their families, and caregivers. With current scientific knowledge and tools, we have unprecedented potential for discoveries that will improve the quality of life for people with ASD.
In response to the heightened societal concern over ASD, Congress passed the Combating Autism Act (CAA) of 2006 (P.L. 109-416) (PDF – 49 KB). Through this Act, Congress intended to rapidly increase, accelerate the pace, and improve coordination of scientific discovery in ASD research. The CAA requires the Interagency Autism Coordinating Committee (IACC) to develop and annually update a Strategic Plan for ASD research, including proposed budgetary requirements.
Driven by both the sense of urgency and a spirit of collaboration, the IACC developed an initial Strategic Plan for ASD Research in 2009 and revised it in 2010 and 2011 in accordance with the CAA. The Plan and its revisions were developed through extensive and iterative input from the public and members of the academic and advocacy communities.
In developing and revising the Strategic Plan, the IACC:
The Strategic Plan incorporates this array of input in two main sections. First, the foundation of the Plan—vision, mission, core values, and crosscutting themes—is described. The remainder of the Plan is organized around seven critical questions asked by people and families living with ASD:
Each question is followed by a brief discussion of what we currently know and need from research, an aspirational goal, research opportunities and objectives, and progress toward accomplishing research objectives. This framework was chosen by the IACC to emphasize the need for consumer-focused research that addresses the most pressing questions of people and families living with ASD, and to link these questions to specific research efforts.
The Strategic Plan will accelerate and inspire research that will profoundly improve the health and well-being of every person on the autism spectrum across the lifespan. The Plan will set the standard for public-private coordination and community engagement.
The purpose of the Strategic Plan is to focus, coordinate, and accelerate high-quality research and scientific discovery in partnership with stakeholders to answer the urgent questions and needs of people on the autism spectrum and their families.
The IACC adopted these core values and emphasized their importance for the Strategic Plan development and implementation:
Sense of Urgency: We will focus on what steps we can take to respond rapidly and efficiently to the needs and challenges of people and families affected by ASD.
Excellence: We will pursue innovative basic and clinical research of the highest quality to protect the safety of and to advance the interests of people affected by ASD.
Spirit of Collaboration: We will treat others with respect, listen to diverse views with open minds, discuss submitted public comments, and foster discussions where participants can comfortably offer opposing opinions.
Consumer Focus: We will focus on making a difference in the lives of people affected by ASD, including people with ASD, their families, medical practitioners, educators, and scientists. It is important to consider the impact of research on the human rights, dignity, and quality of life of people with ASD, from prenatal development forward.
Partnerships in Action: We will value cross-disciplinary approaches, data sharing, teamwork, and partnerships with clearly defined roles and responsibilities.
Accountability: We will develop SMART (Specific, Measurable, Achievable, Realistic, and Time-bound) research objectives aligned with funding priorities and develop systems for evaluation, assessing impact, and course corrections.
The Strategic Plan for ASD Research is designed to highlight the most promising research ideas, while appreciating the inherent unpredictability of research. These ideas form the basis for the research opportunities and objectives of the Strategic Plan. In the process of gathering ideas from ASD stakeholders for this Plan, certain themes emerged repeatedly. These themes are highlighted here to emphasize their importance across the framework.
Heterogeneity: Although certain core features are present at varying degrees among all people with ASD—i.e., social impairments, communication difficulties, and stereotyped behaviors—considerable heterogeneity exists as well. In the context of ASD, the term "heterogeneity" refers to the range of and variability in severity of behavioral and medical conditions and symptoms that may comprise the disorder.
There is little reason to assume that this spectrum identifies a single disorder. Rather, the spectrum encompasses a range of disorders. The heterogeneity of ASD poses both challenges and opportunities to researchers: Challenges because there are likely to be many different causal factors and trajectories for ASD subtypes, and opportunities because recognition of the variety of ASD phenotypes can lead to more appropriate diagnosis, more precisely targeted treatments, and increased public awareness about the diversity inherent in ASD. Heterogeneity has a profound impact on the priorities and tactics of ASD research, because any given study either must focus on a particular focal point on the spectrum, or must be sufficiently complex and resourced to encompass a broader range along the spectrum.
Acknowledging heterogeneity also has implications for intervention. With multiple causes and symptoms, there likely will be multiple ways and approaches to intervene (e.g., medical, behavioral, nutritional). In so doing, the ASD field will be more strategically positioned to determine what works best for which people.
Co-Occurring Conditions: Although autism is currently defined by abnormal behavior, several medical symptoms frequently occur in autism and are an additional source of disability. It is unknown whether these medical symptoms are a primary aspect of some forms of autism or whether they are secondary features. In this document, they will be referred to as co-occurring medical conditions, recognizing that future research may reveal that some of these features could be integral to the behavioral syndrome. In a recent report (PDF – 702 KB) from the Autism Treatment Network , a program funded by Autism Speaks in part through grants from the Health Resources and Services Administration (HRSA) and the National Institute of Mental Health (NIMH), 50% of children with ASD reported experiencing gastrointestinal problems and 65% reported sleep disturbances (Autism Speaks, 2010 (PDF – 702 KB)). Other health issues identified included food sensitivities, anxiety, depression, and seizures. Based on the literature, it is estimated that 22 to 38% of children with ASD experience seizures (Danielsson, 2005; Mouridsen, 2011). These co-occurring conditions, if not treated, can limit a person's ability to benefit fully from educational and behavioral interventions and fully participate in community life. And too often these conditions may not be treated. For example, nonverbal individuals may be unable to voice their health concerns, or clinicians may assume that these co-occurring symptoms are an inherent part of ASD. Research to understand the scope and cause of health conditions for those with ASD, along with the development of multidisciplinary health assessments and effective treatment guidelines, can immediately improve the quality of life for individuals with ASD and their families.
Prevention: It is critical for research to identify the methods and approaches that can be used to prevent the challenges and disabilities of ASD. Additionally, if one views ASD as a biological disorder triggered in genetically susceptible people by environmental factors, then prevention can include prevention of new cases of ASD through the identification and elimination of environmental causes. What is essential for ASD research is to develop the state of knowledge to a level similar to what is now available in fields such as cardiology. No longer do we need to wait for someone to suffer a heart attack before providing life-saving treatments. Rather, early interventions are applied upon the detection of risk factors so as to preempt these more serious consequences. Having sound research on the risk factors and the environmental triggers for ASD ultimately may allow us to achieve the goal of prevention: preventing the development of the disorder in some people at risk or reducing the degree of severity in those affected.
Earlier Detection: ASD is considered a developmental brain disorder that is currently diagnosed by the observation of core behavioral symptoms. As with many neurodevelopmental disorders, brain dysfunction may precede abnormal behavior by months or even years. However, without biomarkers to detect either people with ASD or at risk for ASD during pre- or neonatal periods, diagnosis must rely on behavioral observations long after birth. As a result, intervention efforts may miss a critical developmental window. Until recently, most children with ASD in the United States did not receive a diagnosis until school age, and diagnosis was further delayed among disadvantaged or rural populations (Mandell et al., 2007). It is critical that the field enhance methods for detecting ASD earlier in life and across diverse populations in order to bring about earlier intervention. Furthermore, a recurrent theme expressed during the scientific workshops for the Plan was the need for biomarkers to identify ASD risk before the behavioral manifestations and the delayed developmental trajectory are established.
Lifespan Perspective: Historically, ASD has been characterized as a disorder of childhood. Although most people with ASD will not outgrow their diagnosis, their symptoms will change in form and severity over time. There was great support during the development of this Plan for more research on ASD in older people, especially the need for practical strategies for increasing the quality of life and functioning of adolescents and adults with ASD. As people with ASD advocate for themselves and expand our knowledge of their experiences and needs, they become partners in the research effort.
Self-Determination: People with ASD can, with educational supports and accommodations, acquire skills to lead self-determined lives. Wehmeyer et al. (2010) define self-determined behavior as human behavior that is caused (i.e., determined) by the person as opposed to being caused by someone or something else. People leading self-determined lives make or cause things to happen, acting based on their own will, preferences, choices, and interests, instead of being coerced or forced to act in certain ways by others or circumstances (Wehmeyer et al., 2010 (PDF – 811 KB)). It is essential that ASD-related research incorporate and promote principles of self-determination. In addition, research is needed to help people with ASD incorporate principles of self-determination in their daily living.
Data Sharing: Data sharing allows researchers to (a) validate the research results of other investigators, (b) pool standardized information collected by many different researchers to facilitate rapid progress, and (c) use data collected by others to explore hypotheses not considered by the original investigators. The expectations for data sharing have increased with the recognition that larger samples are needed to answer many research questions and with the sense of urgency for making progress. Databases for neuroimaging scans and genomic sequence are already proving important for ASD research. Wide adoption of a standardized data sharing system like the National Database for Autism Research (NDAR) can provide the necessary infrastructure to combine important research participant data and thereby propel ASD research forward.
Resources: In addition to data sharing, research often depends on the availability and quality of research resources, such as access to scientific instruments and repositories of biospecimens. An important resource, paradoxically, is the identification, assessment, and collection of biospecimens from people who do not have the disorder, as a basis for comparison. Such comparison groups serve a critical role in interpreting ASD research and findings. Moreover, human resources such as adequate numbers of well-trained researchers and administrators are vital to these efforts. This need cannot be understated. Attracting a cadre of rigorously trained researchers, including those outside the ASD research field, will foster innovative ideas and interdisciplinary approaches.
Public-Private Partnerships: A strength of current ASD research is the degree of private involvement and investment in research funding from advocacy groups and committed stakeholders. In addition, the amount of research money awarded by the U.S. government for ASD research has grown rapidly over the past 10 years. There is currently a great willingness on the part of government agencies and private organizations to collaborate on the development and implementation of the Strategic Plan for ASD Research. In fact, the Strategic Plan is built on the premise that the public and private sectors will work collaboratively to better leverage resources to advance the research opportunities and objectives and to prevent unnecessary duplication of research efforts. The existence of such partnerships is a critical component in ensuring the success of the Plan.
Community Engagement in ASD Research: People with ASD, their families, their practitioners, their caregivers, and advocacy organizations have vital roles to play in shaping, participating in, and disseminating research. Their insights and perspectives are needed in order for interventions and services to be developed that will have maximal impact and have the strongest evidence and means for real-world uptake and utilization. The inclusion of stakeholders is also essential to ensure that the personal experiences of people with ASD and their families are reflected in scientific considerations, investment strategy, and research focus. Strategies are needed to increase community engagement in an effort to incorporate the firsthand experience of people with ASD, their families, and their caregivers into the Plan. Community engagement in study design, implementation, and analysis will maximize both the effectiveness and the relevance of new research. Community-based participatory research (CBPR) or participatory action research (PAR) models represent an important avenue to solicit the needed perspectives of people with ASD and their family members in autism research and should be adopted whenever possible.
Ethical, Legal, and Social Implications of Autism Research: As more progress is made in the autism research arena, new ethical, legal, and social implications of ASD research will need to be considered and taken into account by researchers and consumers of research findings. In particular, autism research including studies of genetics, diagnostic screening, and interventions pose unique ethical risks that require consideration both within research projects focused on other questions and in efforts dedicated specifically to exploring these ethical challenges and the appropriate responses to them. As such efforts are undertaken, it is critically important to include people with ASD, family members of individuals on the autism spectrum, and other stakeholder groups within the discussion.
A child's caregivers are often first to identify the signs of ASD. In the classic case, there may be delays or plateaus in a child's attainment of developmental milestones, such as the use of gestures, responding to name, or the onset of speech and pretend play. In other cases, the first signs of ASD occur in young children who appear to regress after they seem to have been developing normally. Current diagnostic criteria and classifications of ASD represent progress in identifying a core set of developmental symptoms that, in the past, might have been attributed to other disorders because of more narrowly defined ASD evaluation criteria.
The diagnosis of ASD can be reliably made by age 3, because the core symptoms emerge by that time. However, most children eventually diagnosed with ASD exhibit signs of abnormal development well before the age of 2. Recent studies of children at high risk because of the presence of a sibling with ASD suggest that many cases of autism can be detected by 12 months of age using simple behavioral tests, such as response to calling the child's name or ease of engaging the child in jointly looking at an object (Landa, Holman & Garrett-Mayer, 2007). Nevertheless, the median age of earliest ASD diagnosis is 4½ years of age (CDC, 2009). A number of screening tools have been developed for detecting autism for children of varied ages and different levels of clinical variability. There are tools available for parents and caregivers, including a video glossary of early "red flags" of ASD in young children developed to help families and professionals learn how to identify subtle differences in development that may indicate areas of concern (Wetherby et al., 2007). In terms of diagnosis, there is emerging evidence that tools can be developed with sufficiently high sensitivity and specificity to support epidemiologic and risk factor studies.
Nationwide, there has been an effort to improve early identification of children with ASD to improve their functioning and outcomes. A recently published randomized, controlled trial demonstrated how a comprehensive developmental behavioral intervention for toddlers with ASD led to improvements in cognitive and adaptive behavior, thereby emphasizing the importance of early identification of and intervention for young children with ASD (Dawson et al., 2010). Various public campaigns, including the CDC's "Learn the Signs. Act Early," have been initiated in recent years to raise awareness about the importance of early identification of developmental delays, including those associated with ASD. The American Academy of Pediatrics (AAP) recommends screening children for ASD at 18 and 24 months with a standardized screening tool (Council on Children with Disabilities, 2006).
Most cases of autism and related disorders are not diagnosed until after a child's third birthday and sometimes not until adulthood, yet early intervention can have a critical influence on the future course of ASD. Moreover, many children from culturally, linguistically, and other diverse groups may have limited access to assessment services, leading to delays in diagnosis (Mandell et al., 2007). Several issues have limited the use of early interventions. It remains difficult to diagnose ASD in very young children because there is considerable healthy variation in the age at which infants and toddlers reach typical developmental milestones (e.g., speech), and delays do not always indicate the presence of a disorder. The diagnosis of ASD in a person of any age is currently based on behavioral and cognitive signs reflecting abnormal brain development, but not on detection of brain or other biological differences that may be present before the emergence of the behavioral or cognitive signs. The discovery of reliable biomarkers could potentially identify people with ASD, or infants who will subsequently develop or are already developing subtle signs of ASD.
Children with ASD develop along different trajectories. Some show abnormal behavior soon after birth; some develop normally for the first year or longer and then regress; while others appear to later improve significantly. Greater clarity is needed in identifying these different trajectories, and greater consistency is needed in applying their definitions. Health care and other early care and education providers may not have received training in recognizing the early warning signs of ASD. Pediatricians may not have received training on using existing screening tools at well checkups as recommended by the American Academy of Pediatrics (Council on Children with Disabilities, 2006). And some caregivers may be unaware of the early warning signs of ASD or where to access services, leading to delays in diagnosis.
Although families are eager for guidance, more research is needed to better answer the question of when developmental variation should become cause for concern. Studies that test both new and current diagnostic and screening methods and that integrate both developmental and biologic approaches in community-based settings are needed. In particular, studies need to be designed to validate methods in underrepresented minorities and disadvantaged populations. Such studies could increase the understanding of barriers to diagnosis and access to services. Taken together, earlier identification, coupled with increased access to interventions and services, could reduce disparities in health care and service provision and ultimately improve outcomes for people with ASD.
Scientific studies of ASD require the reliable diagnosis of participants, but this can be a time-consuming and labor-intensive process. Therefore, streamlined diagnostic approaches that facilitate the enrollment of research participants are needed. Researchers also need ASD measures that are easy to administer and are sensitive to changes in clinical status. With regard to heterogeneity, identifying characteristics that are specific to certain ASD subpopulations could potentially identify neurobiological and genetic markers and improve our understanding of more global causal and intervention mechanisms.
The prevalence of autism continues to rise, according to the most recent data gathered by the Autism and Developmental Disabilities Monitoring (ADDM) Network, supported by the Centers for Disease Control and Prevention (CDC), indicating that nearly 1% of children in the United States have an ASD diagnosis. This reflects an increase of 57% over a four-year period. Importantly, the mean age at diagnosis did not change significantly over this time period, with most children not diagnosed until age 3 to 5 years (Wiggins, Baio & Rice, 2006; CDC, 2009). A second study from the large National Survey of Children's Health, sponsored by the Health Resources and Services Administration (HRSA), used very different study methods from those used in the ADDM project, but also reported an ASD prevalence rate of approximately 1% in children (Kogan et al., 2009).
Research from three important studies over the past year has pointed to the importance of factors that place children at increased risk for ASD. Findings indicate the role of underlying genetic disorders and prenatal risk factors that may warrant screening and early follow-up, and in some instances more specific medical workup. First, an evidence-based review of a large clinical series of people with ASD and with other developmental disorders concluded that using chromosomal microarray resulted in considerably higher diagnostic sensitivity for genetic testing than did G-banded karyotyping, particularly for submicroscopic deletions and duplications (Miller et al., 2010). Second, a study by Johnson et al. found that very preterm birth (<26 weeks gestational age) was associated with a much higher risk of developing ASD, with a prevalence of 8% diagnosed by age 11. While early gestational age has been identified as a risk factor for ASD, previous studies have lacked the power to examine children born at such vulnerable gestational ages. A third study of 7.9 million children in California showed that older fathers and mothers were more likely to have a child with autism as compared with younger parents (Grether et al., 2009). Evidence is also accumulating on the developmental trajectory for autism. A 2010 prospective study showed little deviation between children who eventually developed autism and typically developing children up to age 6 months, after which time measurable differences emerged (Ozonoff et al., 2010). Importantly, while a decrease in developmental trajectory of skills was found in the majority of children, it was not identified by most parents, suggesting current limitations in the use of parent-identified early markers of ASD in the first year of life. Also, Klin et al. found that as compared with typically developing toddlers, toddlers with ASD paid more attention to stimuli in which sound and motion were synchronous. This difference in sensory processing may be connected to the tendency of people with ASD to focus on the mouth rather than the eyes in conversation.
Two important studies highlighted work on the barriers to early screening and diagnosis. Evaluation of the implementation of the AAP recommendations for developmental surveillance was conducted in 17 diverse pediatric practices and demonstrated reasonable success in implementing ongoing screening (85% of practices screened children at recommended screening ages), but also found that pediatric practices experienced challenges in referral for medical subspecialty care and early intervention (King et al., 2010). A second study evaluated the diagnostic sensitivity of the various parent/caregiver autism Level 2 screening scales for children older than 3 years—beyond the AAP-recommended screening ages—and concluded that even in this older age group, while some tests performed well, overall, more scientific evidence is needed for these instruments (Norris & Lecavalier, 2010).
Recent data show that girls are diagnosed with ASD at a later age than are boys (Giarelli et al., 2010; Shattuck et al., 2009). Examination of the 2009 IACC ASD Research Portfolio Analysis shows that studies in girls and minority racial/ethnic/socioeconomically disadvantaged populations remains a gap area (IACC, 2010 (PDF – 1.7 MB)). While possible reasons for this disparity—including different clinical manifestations of ASD by gender and cultural differences in accepted or anticipated behaviors in girls relative to boys—are unclear, gender should be included as an important disparity factor in studies examining barriers to early screening and diagnosis.
There are important ethical, legal, and social implications resulting from the study by Miller et al. (2010), particularly relating to screening for genetic and other markers for autism and other developmental disorders. There is a diverse range of opinions in the autism community on early screening for autism, ranging from strong support for developing biologic prenatal screening methods to concerns that such efforts may lead to selected terminations of fetuses showing genetic or other biomarkers of increased risk. It is imperative that autism research proceed with the appropriate precautions and safeguards and that the concerns of the autism community are reflected in this process. At this point, the state of the science is focused on improving early screening in the first years of life to identify risk for ASD in order to initiate early intervention to reduce or prevent the development of disabling symptoms and promote positive skill development.
The study by King et al. (2010) highlights the need for a clearer understanding of the challenges and barriers to screening and referral. Studies are needed to determine the factors that lead to implementing screening and referral programs that successfully serve children with ASD and their families. Studies should include factors relating to the clinical practice, availability, and collaboration among community-based services, and information needs of parents, other caregivers, and early educators.
There is a lack of reliable and valid screening and diagnostic tests for use in international, resource-poor settings. Early screening and diagnosis, when coupled with inexpensive, parent-guided interventions, is an important potential prevention strategy in such settings.
Research is needed to identify effective methods for identifying children at higher risk for ASD, such as extremely preterm children and children with a sibling with ASD, in community screening efforts. Although the AAP recommends ongoing developmental and autism-specific screening in the first few years of life, establishing risk profiles indicating the need for heightened monitoring of development among some children warrants investigation as an additional tool to improve early identification.
Note: Dates that appear next to the objectives indicate the year that the objective was added to the Strategic Plan. If the objective was revised in subsequent editions of the Plan, the revision date is also noted.
|2009||A.||Develop, with existing tools, at least one efficient diagnostic instrument (i.e., briefer, less time intensive) that is valid in diverse populations for use in large-scale studies by 2011. IACC Recommended Budget: $5,300,000 over 2 years.|
2010 & 2011
|B.||Validate and improve the sensitivity and specificity of new or existing screening and diagnostic tools, including comparative studies of general developmental screening versus autism-specific screening tools, in both high-risk and population-based samples, including those from resource-poor international settings and those that are diverse in terms of age, socio-economic status, race, ethnicity, gender, characteristics of ASD, and general level of functioning by 2012. IACC Recommended Budget: $5,400,000 over 3 years.|
Revised in 2011
|C.||Conduct at least three studies to identify reasons for the health disparities in accessing early screening and diagnosis services, including identification of barriers to implementation of and access to screening, diagnosis, referral, and early intervention services among diverse populations, as defined by socioeconomic status, race, ethnicity, and gender of the child, by 2012. IACC Recommended Budget: $2,000,000 over 2 years.|
|2010||D.||Conduct at least two studies to understand the impact of early diagnosis on choice of intervention and outcomes by 2015. IACC Recommended Budget: $6,000,000 over 5 years.|
|2011||E.||Conduct at least one study to determine the positive predictive value and clinical utility (e.g., prediction of co-occurring conditions, family planning) of chromosomal microarray genetic testing for detecting genetic diagnoses for ASD in a clinical setting by 2012. IACC Recommended Budget: $9,600,000 over 5 years.|
|2011||F.||Convene a workshop to examine the ethical, legal, and social implications of ASD research by 2011. The workshop should define possible approaches for conducting future studies of ethical, legal, and social implications of ASD research, taking into consideration how these types of issues have been approached in related medical conditions.IACC Recommended Budget: $35,000 over 1 year.|
Note: Dates that appear next to the objectives indicate the year that the objective was added to the Strategic Plan. If the objective was revised in subsequent editions of the Plan, the revision date is also noted.
2010 & 2011
|A.||Identify behavioral and biological markers that separately, or in combination, accurately identify, before age 2, one or more subtypes of children at risk for developing ASD, and evaluate whether these risk markers or profiles can improve early identification through heightened developmental monitoring and screening by 2014. IACC Recommended Budget: $33,300,000 over 5 years.|
|2009||B.||Develop at least five measures of behavioral and/or biological heterogeneity in children or adults with ASD, beyond variation in intellectual disability, that clearly relate to etiology and risk, treatment response, and/or outcome by 2015. IACC Recommended Budget: $71,100,000 over 5 years.|
Revised in 2010
|C.||Identify and develop measures to assess at least three "continuous dimensions" (e.g., social reciprocity, communication disorders, and repetitive/restrictive behaviors) of ASD symptoms and severity that can be used by practitioners and/or families to assess response to intervention for people with ASD across the lifespan by 2016. IACC Recommended Budget: $18,500,000 over 5 years.|
Researchers, clinicians, and families have long posed questions about the possible biological bases of ASD. Clinicians classify ASD as a developmental brain disorder based on the behavioral features required for diagnosis. Little evidence exists, however, for a specific neurological abnormality beyond reports of an exuberant and transient pattern of brain or head growth (Akshoomoff, Pierce & Courchesne, 2002; Dawson et al., 2007; Hazlett et al., 2005). While much of the current science suggests that the behavioral features of ASD result from atypical brain structure, wiring, or connections, there is no proven neural variance associated with ASD. Nevertheless, there are some promising leads, and projects are under way that have the potential to provide biological signatures of some forms of ASD.
The development of sophisticated imaging methods has enabled researchers to accurately visualize many aspects of brain structure and functioning. For example, many children and adults with ASD perceive and analyze the visual information conveyed by facial expression differently than do other people (Spezio et al., 2007). Other researchers have employed magnetic resonance imaging (MRI) methods to investigate differences in brain anatomy between people with and without ASD, and have found differences in the density of white and gray matter, in some cases linked to specific symptoms of ASD (Craig et al., 2007).
Subsets of people with ASD have been reported to have experienced regression (i.e., the loss of previously acquired language, social, and developmental skills). The phenomenon is poorly understood and may co-occur with medical conditions common to people with ASD, such as epilepsy. Recent studies have sought to understand the relationship between regressive symptoms, co-occurring disorders such as epilepsy, and the etiology of ASD.
Regression is not unique to people with ASD, and the loss of language skills (acute language regression) can occur in people without the disorder. In one study, researchers found that children with acute language regression (who did not have ASD) were more likely to have associated seizures or epilepsy than were children with regressive autism (which includes language regression, as well as the loss of other social and developmental skills). This suggests that there are different subtypes of language regression and may help to understand the phenomenon and its relationship to ASD (McVicar et al., 2005).
Currently, the frequency of language regression is unknown in either children with ASD or the general population. Previous studies of regression have been hampered by delayed referral for evaluation after the onset of regressive symptoms (McVicar et al., 2005).
A few hypotheses regarding how disruptions of the immune system might contribute to ASD and other neurodevelopmental disorders have emerged in recent years. Some recent findings suggest that the immune system differences of parents and their children may affect early brain development and the onset and fluctuation of symptoms in some children with ASD (Pardo, Vargas & Zimmerman, 2005). For example, some research indicates that maternal autoantibodies directed at fetal brain tissue could interfere with normal brain development (Braunschweig et al., 2008). While such medical symptoms may not be entirely specific to ASD, treating them may have significant impact on quality of life, symptom severity, and level of functioning.
Better understanding of the biology of genes linked to ASD and their functions can also provide insight. Recent studies have shown that the MECP2 gene (mutations in which can cause Rett syndrome) is involved in forming connections at the synapse. Genes regulated by the fragile X syndrome gene, FMR1, also directly affect synapse function by controlling signaling of the neurotransmitter glutamate. In addition, a 2008 study found that the two genes that cause tuberous sclerosis complex (TSC) impair the formation of axons. Recently, several groups reported remarkable success with targeted therapies in animal models of these disorders, showing the ability to reverse the underlying neuroanatomical and even behavioral deficits in the adult (Dolen et al., 2007; Ehninger et al., 2008; Guy et al., 2007). Understanding how MECP2, TS1, FMR1, TSC1 and TS2/TSC2 regulate the growth and function of neurons may help scientists understand related disorders such as autism.
Exploring the biological bases of ASD requires access to biospecimens of people with and without ASD. Some progress has been made to establish the necessary infrastructure for the collection and preservation of postmortem tissue from people with ASD. Nevertheless, the tissues currently available are insufficient for the needs of researchers. Educational campaigns, through contact with health care providers and the internet, may be useful to increase public awareness. New technology is expanding biological research beyond postmortem tissue. For example, it is now possible to create pluripotent stem cells from skin fibroblasts of individual patients to create neuronal cell lines for study.
One of the greatest barriers to progress in determining the biological bases of ASD has been the heterogeneity of the spectrum. A clear need exists to advance understanding of the many phenotypes of ASD, including studies that link genotype to phenotype, investigations of natural and treated history, analyses of genetic interaction with environmental exposures, and studies of co-occurring behavioral and medical conditions. Different autism phenotypes may have different etiologies. There is a need to combine genotyping and functional analysis to better understand the contribution of specific genotypes with functional or structural subtypes. To determine the earliest discernable onset of ASD, experts have expressed the need for an intensive, multidisciplinary study starting at early ages that examines biomedical, neurodevelopmental, and behavioral trajectories of children with ASD. A parallel multidisciplinary analysis of typically developing children and children with non-ASD developmental disorders would be especially enlightening, as limited normative information is currently available. An evaluation of differences in the interplay of biology and environmental exposures for children with and without ASD is also needed. Understanding early trajectories may lead to targeted interventions aimed at mitigating behavioral and medical challenges and improving outcomes through adulthood.
Another understudied arena of ASD research is gender differences. Many studies of autism preferentially enroll males, who, due to a 4:1 increased prevalence, are easier to recruit. Without additional information about the biological features of ASD in females, it remains unclear whether the course of ASD is similar and whether currently used interventions are appropriate for females. It is critical to determine how sex is related to etiology, protective factors, diagnosis, and trajectory. In addition, many studies of autism preferentially enroll higher-functioning individuals who do not have cognitive impairment, because of their ability to cooperate and participate in study-related tasks. However, these individuals represent only a subset of all individuals with autism, and lessons learned from them may or may not be generalizable to all individuals with ASD. Priority must be made to develop studies looking at the underlying etiology of nonverbal individuals and to understand the impact of and etiology of co-occurring language and cognitive impairment.
Over the past year, a group of notable studies advanced what is known about the underlying biology of ASD with respect to neuropathology, symptoms, and cellular metabolism/signaling. In recent years, researchers have noted abnormalities in brain growth, structure, and connectivity in ASD, and numerous 2010 studies strengthen the idea that the brains of people with ASD develop and connect in atypical ways (Anderson et al., 2010; Groen et al., 2010; Lai et al., 2010, Qiu et al., 2010; von dem Hagen et al., 2010).
Researchers published results of the first longitudinal study of early brain growth in toddlers aged 1½ to 5 (Schumann et al., 2010). They found evidence of cerebral gray and white matter overgrowth in all regions by age 2 ½. After correcting for age and gender, they found that almost all brain regions developed at an abnormal rate in ASD and that this trend was more pronounced in girls. Other studies uncovered differences in the volume and structure of the brain's white matter, the component of the brain that carries signals from one region to another and that allows communication between the two hemispheres (Kumar et al., 2010; Zikopoulos & Barbas, 2010). It was recently discovered that such structural abnormalities are found not only in children with ASD, but their unaffected siblings as well (Barnea-Goraly, Lotspeich & Reiss, 2010). New advances in the use of magnetic resonance imaging (MRI) suggest that structural differences in the cortex of the brain could be used as a potential biomarker for ASD (Ecker, 2010).
Important research advances continue to improve the understanding of how changes in the brain might lead to unique characteristics of ASD. Researchers have recently found abnormalities in underlying neural circuits linked to characteristic traits such as atypical eye gaze and difficulties processing visual information, facial expressions, and biological motion (Akechi et al., 2010; Brieber et al., 2010; Dinstein et al., 2010; Dziobek et al., 2010; Kikuchi et al., 2010; Kliemann et al., 2010; Koh, Milne & Dobkins, 2010; Loth, Gomez & Happe, 2010; New et al., 2010). A recent study of biological motion perception suggests that the distinct brain response in ASD may provide a neural endophenotype for the disorder (Kaiser et al., 2010a; Kaiser et al., 2010b). Another notable study is the first to identify a specific gene that can be associated with a neural endophenotype of ASD (Scott-van Zeeland et al., 2010). Using brain imaging, researchers found that variations in the known risk gene CNTNAP2 are associated with differences in functional connectivity in the frontal cortex and can predict performance on a rewards task.
In addition, the Committee has noted the importance of a consensus report about evaluation, diagnosis, and treatment of gastrointestinal disorders in children with ASD in the journal Pediatrics (Buie et al., 2010b). While the panel concluded that it was too early to make evidence-based recommendations, the consensus expert opinion was that people with ASD deserve the same thoroughness and standard of care in treating gastrointestinal symptoms as all patients, and that problem behaviors in ASD may stem from gastrointestinal problems. Of note, a study conducted in Minnesota found that children with ASD did not experience any greater frequency of gastrointestinal symptoms than the general population (Ibrahim et al., 2009). The Committee has also discussed reports of ASD symptoms diminishing during periods of fever and noted that this phenomenon, described in a 2009 review article (Mehler & Purpura, 2009) and discussed at a 2010 Simons Foundation conference (Simons Foundation, 2010 ) warrants further study.
Committee members have pointed to the new focus on metabolic and immune system interactions in ASD through studies of immune molecules, mitochondria, oxidative stress, and viral infections. In 2010, a team of researchers examined oxidative stress in Egyptian children with autism (Mostafa, et al., 2010). They found oxidative stress in close to 90% of these children and that this was related to an index of autoimmunity. They suggest that oxidative stress may play a role in autoimmunity, and that this represents a potential treatment target. In other notable work, a literature review suggests that extant energy metabolism deficits in ASD are not systematically related to specific genetic or genomic defects (Palmieri & Persico, 2010).
Researchers also examined gray matter from postmortem brains of individuals with ASD and found increased levels of oxidized mitochondrial proteins in more than half of subjects that were related to high calcium levels (Palmieri et al., 2010). They concluded that interactions between the mitochondrial aspartate/glutamate carrier gene and altered calcium homeostasis may play a role in autism.
Researchers are continuing to study how neuroimmune abnormalities may be associated with ASD. In a 2010 study, researchers investigated activation in microglia, cells that offer the first line of immune defense in the central nervous system. Marked activation was observed in 5 of the 13 people with ASD included in the study (Morgan et al., 2010). There is also evidence that autoimmune factors may play a role. A study of 690,000 Danish children found that those with ASD were significantly more likely to have families with a history of rheumatoid arthritis, Type 1 diabetes, or celiac disease (Atladóttir et al., 2009).
Another notable study in 2010 explored how vertical viral transmission, or the transmission of a virus from mother to child just before or after birth, may play a role in the development of ASD (Lintas et al., 2010), and a study of urinary porphyrin excretion found elevated levels in children with ASD when compared to their typically developing peers, indicating a potentially unusual pattern of metabolism (Woods et al., 2010). In addition, recent progress has been made in the development of mouse models of autism (Silverman et al., 2010; Hamilton et al., 2011). These studies and others highlight the importance of continuing to investigate multiple potential pathways and develop improved model systems to better understand the complexity of ASD.
The Committee highlighted the newly emerging area of metabolomics, which in well-controlled studies may provide a way to examine genotype-phenotype relationships. The Committee also noted the importance of staying abreast of research from other fields that may be helpful in identifying "endophenotypes" in autism. Endophenotypes are partial/constituent phenotypes that may be more highly linked to specific genetic causes, which may not be appreciated in studies that combine all symptom profiles. Endophenotypes may aggregate in families and be amenable to deep sequencing genetic studies to identify genetic underpinnings. They also can be common to multiple neurodevelopmental disorders and offer leverage for understanding similarities and differences between different forms of developmental psychopathology.
Public comment received by the Committee in the past year points to the need for continued study of regressive autism and females with ASD. In addition, new concerns were raised about the relationship between ASD and epilepsy, liver issues, and other diseases. The relationship between inflammation in expectant mothers and ASD, as well as the association of ASD with apraxia of speech, were also identified as potential issues for further examination.
Several implementation-related issues were raised by the Committee. These include the need to add rapidly emerging findings related to cell metabolism, signaling, neuroimaging, genetics, epigenetics, and co-existing medical conditions into existing databases designed to phenotype the "autisms." Finally, the Committee emphasized the urgent need to accelerate translation of research findings to clinical practice.
As exemplified by the progress in the literature and funding as documented by the 2009 IACC ASD Research Portfolio Analysis, autism research is proceeding at a brisk pace (IACC, 2010 (PDF – 1.7 MB)). There are many promising studies of the neural correlates of autism-related symptoms that have yet to be classified.
Note: Dates that appear next to the objectives indicate the year that the objective was added to the Strategic Plan. If the objective was revised in subsequent editions of the Plan, the revision date is also noted.
Revised in 2011
|A.||Support at least four research projects to identify mechanisms of fever, metabolic and/or immune system interactions with the central nervous system that may influence ASD during prenatal-postnatal life by 2010. IACC Recommended Budget: $9,800,000 over 4 years. (Fever studies to be started by 2012.)|
Revised in 2010
|B.||Launch three studies that specifically focus on the neurodevelopment of females with ASD, spanning basic to clinical research on sex differences by 2011. IACC Recommended Budget: $8,900,000 over 5 years.|
|2009||C.||Identify ways to increase awareness among the autism spectrum community of the potential value of brain and tissue donation to further basic research by 2011. IACC Recommended Budget: $1,400,000 over 2 years.|
|2010||D.||Launch three studies that target improved understanding of the underlying biological pathways of genetic conditions related to autism (e.g., fragile X, Rett syndrome, tuberous sclerosis complex) and how these conditions inform risk assessment and individualized intervention by 2012. IACC Recommended Budget: $9,000,000 over 5 years.|
Revised in 2011
|E.||Launch three studies that target the underlying biological mechanisms of co-occurring conditions with autism, including seizures/epilepsy, sleep disorders, wandering/elopement behavior, and familial autoimmune disorders, by 2012. IACC Recommended Budget: $9,000,000 over 5 years.|
|2010||F.||Launch two studies that focus on prospective characterization of children with reported regression to investigate potential risk factors by 2012. IACC Recommended Budget: $4,500,000 over 5 years.|
|2010||G.||Support five studies that associate specific genotypes with functional or structural phenotypes, including behavioral and medical phenotypes (e.g., nonverbal individuals with ASD and those with cognitive impairments) by 2015. IACC Recommended Budget: $22,600,000 over 5 years.|
|2009||A.||Complete a large-scale, multidisciplinary, collaborative project that longitudinally and comprehensively examines how the biological, clinical, and developmental profiles of individuals, with a special emphasis on females, youths, and adults with ASD, change over time as compared to typically developing people by 2020. IACC Recommended Budget: $126,200,000 over 12 years.|
|2010||B.||Launch at least three studies that evaluate the applicability of ASD phenotype and/or biological signature findings for performing diagnosis, risk assessment, or clinical intervention by 2015. IACC Recommended Budget: $7,200,000 over 5 years.|
As with many complex disorders, causation is generally thought to involve some forms of genetic risk interacting with some forms of non-genetic environmental exposure. The balance of genetic risk and environmental exposure likely varies across the spectrum of ASD. The greatly increased concordance of strictly defined autism in monozygotic (identical) twins (70 - 90%) compared to dizygotic (fraternal) twins (0 - 10%) argues for the importance of genetic factors (Bailey et al., 1995; Steffenburg et al., 1989). Moreover, there are subpopulations of those diagnosed with ASD who have a known genetic mutation, often associated with a genetic disorder, such as fragile X syndrome, Rett syndrome, or tuberous sclerosis complex, the understanding of which has led to identification of possible pharmaceutical interventions. In many cases, the same genetic variation does not result in an ASD phenotype, suggesting possible genetic or environmental modifiers that could be important intervention targets. Using new technology that reveals gaps and extra copies in DNA sequences, researchers have found that some people with ASD have deletions and duplications of genetic material not found in their parents' DNA (Sebat et al., 2007). Recent genetics research has identified common genetic variations (e.g., Wang et al., 2009; Weiss et al., 2009), changes in chromosomal structure in specific genomic regions, (Marshall et al., 2008; Kumar et al., 2008; Weiss et al., 2008) and rare mutations in genes all associated with synaptic connectivity (Alarçon et al., 2008; Bakkaloglu et al., 2008; Durand et al., 2007; Jamain et al., 2003; Laumonnier et al., 2004; Strauss et al., 2006). Some of these findings have contributed to new hypotheses about the inheritance of ASD. In families with just one affected member, spontaneous deletions and duplications may be causal factors of ASD. However, what causes these spontaneous deletions and duplications is not clear and could be due to environmental exposures.
Taken together, rare genetic mutations, chromosomal abnormalities, and sub-microscopic deletions and duplications of genetic material are involved in at least 10% of ASD cases, yet individually each abnormality is found in no more than about 1 to 2% of cases (Abrahams & Geschwind, 2008). Since common genetic variations confer only a modest increase in risk, this suggests that the genetic factors in ASD may involve many different genes and interactions between genes and environment. Possible models include: many additional rare genetic mutations to be discovered; multiple common genetic variations each conferring a small increased risk; and many forms of ASD with different genetic contributions, both common and rare, in the population. There is growing recognition that the same genetic contributions can lead to a wide variety of different phenotypes across individuals. As one good example, deletions and duplications in chromosomal region 16p11 have been associated with a broad range of phenotypes, including disorders outside the autism spectrum. The factors responsible for this variability in disease phenotypes remain to be defined.
Researchers are working to better understand the interaction of genetic vulnerability with developmental experiences, such as a specific environmental exposure. While gene-environment interactions have been hypothesized to play a role in many medical disorders, these interactions have been difficult to prove or disprove beyond statistical tests showing that some genetic subgroups have a greater response to some environmental factors. Epigenetics is one mechanism by which it is thought that environmental factors may be influencing gene expression, and now molecular tools are allowing researchers to gain insight into epigenetic phenomena that may be contributing to a variety of disorders, including ASD (Baccarelli & Bollati, 2009; Nagarajan et al., 2008).
While genetics maps the sequence of DNA, epigenetics maps the modifications of the structure of DNA due to proteins or other factors that bind to the DNA helix. DNA is essentially linear text that gets "read" into RNA that in turn codes for proteins. Epigenetic modifications do not change the text, but they highlight or redact large sections of text, changing how it is read. Epigenetic modifications consist of biochemical "tags" that attach to the DNA in different places, leading to the "silencing" or "activation" of genes. The pattern of epigenetic silencing or activation of genes can differ between genders, between species or between generations, and can change during specific time windows in development or in response to environmental cues. It is thought that the addition or removal of epigenetic tags from DNA is one mechanism by which developmental experience (e.g., exposure to physical or emotional stimuli) can cause long-term biological and behavioral effects. In 2009, the first maps of the human epigenome provided the first comprehensive look at where and how nature and nurture may interact (Lister et al., 2009).
Progress in identifying environmental factors that increase autism risk has been made recently (Eskenazi et al., 2007; Palmer et al., 2006; Palmer, Blanchard & Wood, 2009; Rauh et al., 2006; Roberts et al., 2007; Windham et al., 2006), although this area of research has received less scientific attention and far fewer research dollars than genetic risk factors. Environmental factors may be pertinent not only to brain development, but also to chronic systemic features of at least some subgroups of ASD. An Institute of Medicine (IOM) workshop held in 2007 summarized what is known and what is needed in this field (Forum on Neuroscience and Nervous System Disorders, Institute of Medicine, 2008 ). Numerous epidemiological studies have found no relationship between ASD and vaccines containing the mercury based preservative thimerosal (Immunization Safety Review Committee, 2004 ). These data, as well as subsequent research, indicate that the link between autism and vaccines is unsupported by the epidemiological research literature. However, the IOM report acknowledged that the existing population-based studies were limited in their ability to detect small susceptible subpopulations that could be more genetically vulnerable to environmental exposures.
Of note, the Committee receives many public comments that reflect concerns about vaccines as a potential environmental factor in autism. Some members of the public are convinced that the current data are sufficient to demonstrate that vaccines do not play a causal role in autism and argue against using limited autism research funds to do additional vaccine studies when many other scientific avenues remain to be explored. At the same time, those who believe that prior studies of the possible role of vaccines in ASD have been insufficient argue that investigation of a possible vaccine/ASD link should be a high priority for research (e.g., a large-scale study comparing vaccinated and unvaccinated groups). A third view urges shifting focus away from vaccines and onto much-needed attention toward the development of effective treatments, services, and supports for those with ASD.
In addition, a number of other environmental factors are being explored through research because they are known or suspected to influence early development of the brain and nervous system. Recent studies suggest that factors such as parental age and exposure to infections, toxins, and other biological agents may confer environmental risk. These findings require further investigation and testing, some of which is ongoing through the CDC's Centers for Autism and Developmental Disabilities Research and Epidemiology (CADDRE) and Study to Explore Early Development (SEED) programs, as well as through several NIH-funded studies, including the Norwegian Autism Birth Cohort (ABC) study, the Childhood Autism Risks from Genetics and the Environment (CHARGE) study, the Early Autism Risk Longitudinal Investigation (EARLI) study, and the Centers for Children's Environmental Health and Disease Prevention, which is supported collaboratively by the National Institute of Environmental Health Sciences (NIEHS) and the Environmental Protection Agency (EPA).
Although most scientists believe that risk factors for ASD are both genetic and environmental, there is considerable debate about whether potential environmental causes, genetic precursors, or interactions between genes and environmental factors should be the highest priority for research aimed at identifying the causes of ASD. To date, few studies have ruled in or ruled out specific environmental factors. There are reports of associations of ASD with exposure to medications, maternal antibodies, toxicants, and infections prenatally or postnatally; however, these observations need to be the subject of additional study. It is still not known whether any specific factor is necessary or sufficient to cause ASD. Similar to other disease areas, advancing research on the potential role of environmental factors requires resources and the attraction of scientific expertise. Bringing this to bear on autism will help define the environmental factors to study, as well as the best approach for staging studies to examine environmental factors, interaction between factors, and between individual susceptibility and various environmental factors.
For example, some researchers believe that it is important to study a large number of exposures, or classes of exposure, that are known to affect brain development. Others support more tightly focused studies of one exposure or a limited number of exposures, with greatest biologic plausibility for interacting with known or suspected biologic or genetic ASD risk factors. In addition, it is also important to design studies that assess environmental exposure during the most relevant exposure windows: pregnancy and early development. In doing this research, it will be important for the field to develop sound standards for identifying and claiming that environmental factors contribute to ASD, as it is for genetics.
Research studies on risk factors can be pursued through several means. Smaller, focused studies are needed for hypothesis testing and to provide insight for replication studies. Similar to other health outcomes research for relatively rare conditions, case-control studies can be an effective first line of inquiry. The NIH-supported CHARGE and CDC-supported CADDRE/SEED studies are good examples of this approach, in which environmental exposures and biological pathways, along with genetics, are being examined. Other existing cohorts could also be identified and used for epigenomic as well as traditional genomic and environmental studies.
To address public concerns regarding a possible vaccine/ASD link, it will be important for the IACC to continue to coordinate with the National Vaccine Advisory Committee (NVAC), a Federal advisory committee chartered to advise and make recommendations regarding the National Vaccine Program.
Epigenomics provides a ready mechanism for understanding how genes and environment may act jointly to affect autism risk. Studies are needed to investigate whether candidate environmental exposures alter epigenetic mechanisms that modify the expression of suspected autism susceptibility genes or genomic regions. Such studies should incorporate examination of time or stage of development as an important factor determining the impact of environmental agents on epigenetic programming. Finally, studies are needed to understand how changes in epigenetic tags in response to environmental stimuli could lead to specific phenotypic characteristics associated with autism.
Another approach for studying risk factors for ASD requires large sample sizes to disentangle the many possible genetic and environmental factors that contribute to and help explain ASD and the frequently co-occurring conditions. For other complex disorders, large DNA collections (i.e., >20,000 samples) have been necessary to detect the full genetic risk architecture. There are no genetic repositories of this size for ASD. Similarly, large birth cohort studies, in which biological samples have been collected throughout pregnancy and early postnatal life, may be essential for detecting the interplay of environmental exposures and genetic factors that lead to ASD. As a complement to these large-scale studies, research on critical subpopulations that may be at higher risk could provide leverage in identifying genetic and environmental risk factors.
A variety of discoveries have advanced knowledge of the biological underpinnings of autism. It was previously found that, among individuals with ASD, copy number variants, which are submicroscopic deletions and duplications in the genome occur more frequently in areas containing ASD risk genes (Cook & Scherer, 2008; Sebat et al., 2007; Weiss et al., 2008). A 2010 study showed that some of these copy number variants involved genes previously found to be associated with autism and some involved new rare mutations (Pinto et al., 2010). In addition, it was reported that neurodevelopmental disorders are more common in infants born prematurely and that preterm infants are at increased risk of developing autism (Johnson et al., 2010b). A study of blood mercury levels in 452 children in the NIH-funded Childhood Autism Risk from Genetics and the Environment (CHARGE) study showed that total mercury in blood was neither elevated nor reduced in preschool children with ASD (Hertz-Picciotto et al., 2010). In a separate study, no link was found between the exposure to thimerosal, a mercury-containing preservative used in vaccines, and increased risk for ASD (Price et al., 2010).
New data based on the Autism Speaks–supported Autism Treatment Network (ATN) patient registry and studies of high-risk infants indicate that autism is associated with high rates of several medical conditions, including gastrointestinal dysfunction, sleep disturbance, psychiatric conditions, and seizures (Presentation to IACC on the Autism Treatment Network, 2010). These co-occurring conditions are poorly studied, yet investigating them may reveal unexpected clues to environmental risk factors. For example, nonmotor features associated with Parkinson's disease (e.g., gastrointestinal problems, olfactory deficits, autonomic abnormalities) have yielded information about Parkinson's disease etiology and can serve as harbingers of the condition (Tolosa et al., 2009).
On September 8, 2010, NIEHS and Autism Speaks co-sponsored a meeting of scientists from both inside and outside the field of autism to identify novel opportunities and mechanisms to accelerate research on environmental factors and autism (Agenda from Autism and the Environment Workshop, 2010). Environmental factors considered included all factors affecting health that are external to the individual (such as physical, biological, chemical, dietary, social, and cultural), as well as the non-genetic characteristics of an individual (such as age, nutritional status, physical functioning, and medical history). As noted during the meeting, understanding environmental influences to autism will require both agnostic, discovery-based science as well as hypothesis-driven science in parallel. The set of recommendations developed from the meeting cite the need for strong interdisciplinary teams to move findings back and forth from clinical and epidemiologic settings to mechanistic studies. Research needs and opportunities identified included expansion of epidemiology investigations to capitalize on existing resources, development of a range of model systems that can address the complexity of autism, exploration of bioinformatics and screening approaches to identify environmental chemicals of interest, increased emphasis on neuropathology, enhancement of capacity for measurement of environmental compounds, harmonization of exposure assessment instruments, and mechanisms for expanding the workforce.
Technical advances in the past year increase traction for finding genetic and environmental risk factors. Novel bioinformatics platforms can be used to map genes to specific signaling pathways and to explore what environmental exposures are most likely to influence those pathways. Toxicogenomics data such as those produced by the EPA's National Center for Computational Toxicology could be mined to determine which environmental compounds act on the genes of interest. An important finding this year revealed the extent of "parent of origin" effects—i.e., for many genetic variations, risk depends on whether this variation was inherited from the maternal or paternal genome. And recent studies have revealed the importance of epigenetic mechanisms in disease etiology, bringing together genetic and environmental factors for the first time.
Information on the utility of induced pluripotent stem (iPS) cells and mesenchymal stem cells for exploring the biological bases of ASD is rapidly developing, pointing to the opportunity to use these tools as molecular assays for understanding genetic variation as well as for translational toxicology. Although research this year revealed several differences between these iPS cells, which can be easily and non-invasively derived from a person's skin cells, and embryonic stem cells, iPS cells continue to be one of the most promising new frontiers for understanding risk for ASD.
In a 2009 report by the National Vaccine Advisory Committee (NVAC), it was recommended that, in the context of immunization research, the ASD clinical subset of particular interest is regressive autism (National Vaccine Advisory Committee, 2009 (PDF – 630 KB)). Although the NVAC stressed that the temporal occurrence of this regression and the immunization schedule is not evidence of a causal relationship, regressive autism warrants further research in rigorously defined subsets of ASD. The NVAC noted that studies in this subpopulation might involve comparison of immune cytokine profiles between regressive and non-regressive ASD to screen for differential immune system profiles, or prospective immunization responsive profiling in siblings of children with regressive ASD. In addition, the NVAC recommended that studies assess whether adverse events following immunization (e.g., fever and seizures) correlate with risk of ASD, and that immune response profiles be examined in ASD cases with a history of adverse events following immunization.
The 2009 IACC ASD Research Portfolio Analysis indicated that about one-third of autism research studies funded by the Federal government and private organizations corresponded to risk factors/Strategic Plan Question 3, with the majority of this funding directed toward the identification of genetic risk factors and less funding and attention toward environmental research (IACC, 2010 (PDF – 1.7 MB)). This analysis suggests that environmental research is an understudied area that has been given insufficient attention and requires a heightened priority. Based on this, the Committee made several specific recommendations for research objectives and needed resources, which are reflected in the new objectives added to the Plan in 2011.
Suitable model systems and those that offer better high-throughput capabilities for the study of environmental risk factors and their interaction with genetic susceptibility are needed. For example, models such as Drosophila melanogaster (fruit flies) and Danio rerio (zebrafish) have been extremely useful in identifying environmental contributors to other conditions, such as Parkinson's and Alzheimer's disease. The genetics and biology of synapse formation and function are increasingly well understood, underscoring the potential utility of vertebrate and invertebrate models for exploring how environmental exposure can affect brain function at the cellular and molecular levels.
Expansion and integration of epidemiological studies using different designs and types of data are needed. Combining data from multiple studies will be necessary to enhance statistical power, requiring standardization of protocols, instrument development, and data harmonization methods. This should also include standardized protocols on biological specimen collection, storage, and analysis. International studies offer unique opportunities to examine populations with different genetic and environmental exposure backgrounds. It would be helpful to create an autism "atlas" to examine differences in autism prevalence as a function of geography. Such analysis has proved useful in both cancer and asthma research.
There is a need for greater collaboration between genetic and environmental science investigators. Studies collecting genetic information should include data on environmental exposures and vice versa; large data sets are needed to allow mapping of detailed genetic, environment, and phenotypic information, including co-occurring medical conditions, inflammatory markers, pattern of onset, developmental course, and family history.
To accelerate our understanding of the role of epigenetics in autism etiology, further development and application of sensitive assays to measure DNA methylation, histone modification, and other epigenetic marks are needed. Studies are also needed to examine how exposures may act on maternal or paternal genomes via epigenetic mechanisms to influence risk for ASD.
The lack of adequate postmortem brain tissue continues to be a major barrier to progress in understanding the neurobiology of ASD, including the potential influence of environmental factors on the functional pathways involved in ASD.
Efforts to increase analytical capacity and core facilities are needed. For example, adding an environmental, immune, or animal models core to an already existing multidisciplinary team that studies autism would be beneficial. Access to these core facilities and services could encourage individual scientists to expand the scope of their studies to address environmental hypotheses.
Revised in 2010
|A.||Coordinate and implement the inclusion of approximately 20,000 subjects for genome-wide association studies, as well as a sample of 1,200 for sequencing studies to examine more than 50 candidate genes by 2011. Studies should investigate factors contributing to phenotypic variation across individuals who share an identified genetic variant and stratify subjects according to behavioral, cognitive, and clinical features. IACC Recommended Budget: $43,700,000 over 4 years.|
|2009||B.||Within the highest-priority categories of exposures for ASD, identify and standardize at least three measures for identifying markers of environmental exposure in biospecimens by 2011. IACC Recommended Budget: $3,500,000 over 3 years.|
|2009||C.||Initiate efforts to expand existing large case-control and other studies to enhance capabilities for targeted gene-environment research by 2011. IACC Recommended Budget: $27,800,000 over 5 years.|
|2009||D.||Enhance existing case-control studies to enroll racially and ethnically diverse populations affected by ASD by 2011. IACC Recommended Budget: $3,300,000 over 5 years.|
|2010||E.||Support at least two studies to determine if there are subpopulations that are more susceptible to environmental exposures (e.g., immune challenges related to infections, vaccinations, or underlying autoimmune problems) by 2012. IACC Recommended Budget: $8,000,000 over 2 years.|
|2010||F.||Initiate studies on at least 10 environmental factors identified in the recommendations from the 2007 IOM report "Autism and the Environment: Challenges and Opportunities for Research" as potential causes of ASD by 2012. IACC Recommended Budget: $56,000,000 over 2 years.|
|2011||G.||Convene a workshop that explores the usefulness of bioinformatic approaches to identify environmental risks for ASD by 2011. IACC Recommended Budget: $35,000 over 1 year.|
|2011||H.||Support at least three studies of special populations or use existing databases to inform our understanding of environmental risk factors for ASD in pregnancy and the early postnatal period by 2012. Such studies could include:
Emphasis on environmental factors that influence prenatal and early postnatal development is particularly of high priority. Epidemiological studies should pay special attention to include racially and ethnically diverse populations. IACC Recommended Budget: $12,000,000 over 5 years.
|2011||I.||Support at least two studies that examine potential differences in the microbiome of individuals with ASD versus comparison groups by 2012. IACC Recommended Budget: $1,000,000 over 2 years.|
|2011||J.||Support at least three studies that focus on the role of epigenetics in the etiology of ASD, including studies that include assays to measure DNA methylations and histone modifications and those exploring how exposures may act on maternal or paternal genomes via epigenetic mechanisms to alter gene expression, by 2012. IACC Recommended Budget: $20,000,000 over 5 years.|
|2011||K.||Support two studies and a workshop that facilitate the development of vertebrate and invertebrate model systems for the exploration of environmental risks and their interaction with gender and genetic susceptibilities for ASD by 2012. IACC Recommended Budget: $1,535,000 over 3 years.|
|2009||A.||Conduct a multi-site study of the subsequent pregnancies of 1,000 women with a child with ASD to assess the impact of environmental factors in a period most relevant to the progression of ASD by 2014. IACC Recommended Budget: $11,100,000 over 5 years.|
|2009||B.||Identify genetic risk factors in at least 50% of people with ASD by 2014. IACC Recommended Budget: $33,900,000 over 6 years.|
|2009||C.||Determine the effect of at least five environmental factors on the risk for subtypes of ASD in the prenatal and early postnatal period of development by 2015. IACC Recommended Budget: $25,100,000 over 7 years.|
|2009||D.||Support ancillary studies within one or more large-scale, population-based surveillance and epidemiological studies, including U.S. populations, to collect data on environmental factors during preconception, and during prenatal and early postnatal development, as well as genetic data, that could be pooled (as needed) to analyze targets for potential gene/environment interactions by 2015. IACC Recommended Budget: $44,400,000 over 5 years.|
Although autism is defined and diagnosed by deficits in core behaviors, accumulating evidence suggests that the breadth of this disorder extends well beyond the behavioral diagnosis. There is increasing recognition that the multiple systemic issues in children with ASD may influence vulnerability, onset, and severity of symptoms and behaviors. The systemic component of autism supports the possibility that both the core behaviors and medical issues have a convergent mechanistic basis that, if identified, could provide new insights into treatment targets, candidate genes, and strategies for prevention.
A wide range of treatment and intervention options are available for children and adults with ASD that can target core symptoms, ameliorate associated symptoms, and prevent further disability. For example, interventions such as speech therapy facilitate language development, pragmatic communication, and social interaction. Occupational therapy can improve functioning in everyday activities (e.g., eating, bathing, and learning) as well as sensory integration. Both types of therapy can promote the development of life skills, which help people with ASD to gain more independence. People with ASD can benefit from adaptive technologies, such as the use of keyboards and computers that promote expressive communication skills, and visual representation tools such as the Picture Exchange Communication System (PECS) that assist those with little or no language to communicate more effectively. For preschool and school-age children, public school systems and private schools can provide essential interventions including curricula that are individualized to the child, testing for cognitive and academic strengths and weaknesses, and special education services with lower teacher-to-student ratios, to name a few. For all of these interventions, there is a range of improvement, with some people making profound gains and others showing little response. We do not know how to predict which people will benefit from any of the available treatments.
Of the numerous behavioral interventions currently in use, little scientific evidence from randomized controlled trials (RCTs) supports their efficacy. Behavioral therapies, such as applied behavior analysis (ABA) based therapies, which use the principles of reinforcement and repetition, have been used since the 1960s and have been studied most extensively. Controlled trials have shown ABA to be effective for improving social skills and language when provided for at least 25 to 40 hours per week for 2 years (Lord & McGee, 2001 ). Efficacy is greatest when behavioral interventions are used early, but improved skills have been reported with adolescents and adults (McClannahan, MacDuff & Krantz, 2002; Weiss & Harris, 2001).
Medications to improve some of the symptoms associated with autism have been studied. However, thus far, no medication has been shown in controlled trials to enhance social behavior or communication. In 2006, risperidone became the first Food and Drug Administration (FDA) approved pharmacologic therapy for certain symptoms of autism. First introduced in 1993 as a medication used to treat symptoms of schizophrenia, risperidone has now been shown to be effective as a treatment of irritability and aggression seen in some children with ASD (McDougle et al, 2005 ). Selective serotonin reuptake inhibitors have had mixed results in decreasing certain repetitive and stereotyped behaviors (Kolevzon, Mathewson & Hollander, 2006; King et al., 2009). Other biological and pharmacological treatments that have been investigated in small studies and may warrant fuller attention include omega-3 fatty acids, memantine, oxytocin, and pioglitazone (Amminger et al., 2007; Chez et al., 2007; Hollander et al., 2007; Boris et al., 2007).
There are other treatments in wide use that have not been studied in randomized controlled trials. These include nutritional supplements and diets (e.g., probiotics, mitochondrial cocktails, CoQ10, carnitine, and gluten-casein free diets), and chelation. One such treatment, the neuropeptide secretin, that had been reported to improve symptoms of ASD, was studied in a placebo-controlled trial and found to be ineffective (Esch & Carr, 2004). Some parents and therapists suggest that these treatments are effective, that recovery is possible, and that further studies are needed. Others are concerned that these treatments involve more than minimal risks and urge caution before recommending large-scale studies.
Safe and effective interventions are needed across the lifespan, from early development shortly after the detection of risk or diagnosis through childhood, school age, adolescent, adult, and senior phases of life. Going forward, research needs to be balanced between two poles. On the one hand, there is a need for novel, targeted interventions based on an understanding of the molecular mechanisms of ASD. These interventions, analogous to ongoing efforts in cancer and cardiovascular research, will require a successful commitment to earlier elements of this Strategic Plan. On the other hand, there is a need for rigorous studies to develop and safely test the efficacy of current interventions, identifying which elements are most effective in reducing or ameliorating symptoms for which people. Intervention research should collect information about the mode of delivery, intensity, duration, and dose, as well as unique characteristics of the people with ASD (e.g., behavioral, biological, genetic) in an effort to develop more personalized interventions, treatments, services, and supports, and to help inform basic research about additional targets for study. This research will require large-scale multidisciplinary randomized controlled trials.
The identification of biomarkers—for instance in plasma, saliva, cerebrospinal fluid (CSF), or tissue—is necessary to provide insights into targeted treatment strategies designed to improve or reverse autistic symptoms, as well as insights into preventive measures. Further, if biomarkers present in children with ASD are found to be present in infants and toddlers at high risk of developing autism, then targeted intervention strategies to normalize these biomarkers could be tested for the potential to arrest or reverse the symptoms and progression of autism.
Decision makers (people with ASD, families, clinicians, and payors) frequently lack critical information about which treatment is best for an individual person. While there are many interventions in wide use, the field lacks comparative studies of their value or how these various interventions should be staged or combined. Comparative effectiveness research yields information from head-to-head comparisons of interventions or policies that, when combined with a personalized approach, can inform decision makers about health care choices. This approach, already helpful for cardiovascular and cancer research, needs to be developed to inform ASD interventions.
Special attention is needed on treatment of co-occurring medical conditions, developing pharmacological treatments, and testing interventions that are in wide use (e.g., nutritional supplements), but for which little rigorous efficacy data exist (Levy & Hyman, 2003). Co-occurring conditions, such as gastrointestinal symptoms and sleep disorders, may influence the effectiveness of interventions designed to affect the core symptoms of ASD. Similarly, interventions that focus on co-occurring conditions may also affect or reduce core symptoms. Animal models and/or cell lines relevant to autism are needed to develop new or test existing pharmacological agents for ASD, understand the mechanisms of action, and serve as a first-step in testing drug safety. Such model systems research may be crucial in leveraging the pharmaceutical industry to develop medications that target the core symptoms of ASD.
While some people with ASD have been reported to show marked improvement, little is known about the characteristics of these people or the types of interventions they have received that may help to explain these changes. Studies of these people may provide an opportunity for discovering important clues with regard to risk factors and intervention strategies for specific ASD subgroups.
Several notable studies and reviews on the efficacy of specific interventions for improving outcomes of individuals with ASD were published in 2010. These include a study showing that medications such as risperidone are most effective for reducing irritability and aggression when they are combined with intensive behavioral intervention (Frazier et al., 2010). A study of psychotropic medication use over time in youth and adults with ASD showed an increasingly high likelihood of staying medicated across the life course (Esbensen et al., 2009).
Recent research also supports the benefits of social skills training for people with ASD. A 2010 study showed improved levels of social interaction and peer relationships (Frankel et al., 2010), while a randomized controlled trial (RCT) evaluating a social skills group intervention found improvements in social behavior for children with ASD who had high cognitive ability (Derosier et al., 2010).
In other notable work conducted in 2010, a systematic review concluded that modified cognitive behavioral interventions are efficacious for reducing anxiety in individuals with Asperger syndrome (Lang et al., 2010). In addition, a RCT of a caregiver-mediated joint engagement intervention for toddlers showed positive results; it represents the first controlled data to suggest that short-term parent-mediated intervention can be efficacious for improving joint attention and functional play acts with maintenance of skills one year post-intervention (Kasari et al., 2010).
An environmental scan study, supported by the Centers for Medicare & Medicaid Services (CMS), examined interventions for children, youth, and adults with ASD (Young et al., 2010 (PDF – 2.44 MB)). The scan included services addressing the core impairments associated with ASD, as well as other support services, such as behavioral interventions, peer training, and supported employment. For children, 15 interventions met the "evidence-based" criteria established, while the other 16 interventions studied met only the criteria for emerging or unestablished interventions. Far less evidence was available on services and supports for transitioning youth and adults, underscoring the need for more research in this area.
In the area of early behavioral interventions, a randomized controlled trial demonstrated the efficacy of a comprehensive early intensive behavioral intervention, based on the Early Start Denver Model, which integrates developmental approaches with principles of applied behavioral analysis (ABA) for improving IQ, language, and adaptive behavior and reducing severity of autism diagnosis in toddlers with ASD (Dawson et al., 2010). In addition, three reviews of the effectiveness of early intensive behavioral intervention based on ABA were published. The Institute of Education Sciences reviewed findings specific to the Lovaas model of ABA, concluding that this model has been shown to have potentially positive effects on cognitive development but had no discernable effect on communication/language competencies, social-emotional development and behavior, or functional abilities (Institute of Education Sciences, 2010). In the Annual Review of Clinical Psychology, Vismara and Rogers (2010) concluded that both comprehensive and targeted early intervention programs based on ABA are effective for improving communication, social skills, and management of behavioral challenges.
Finally, results of a meta-analysis showed that long-term, comprehensive ABA interventions for children with ASD lead to medium to large positive effects in intellectual functioning, language development, acquisition of daily living skills, and social functioning (Virues-Ortega, 2010). Effects for language-related outcomes (e.g., IQ, receptive and expressive language, communication) were more robust than nonverbal IQ, social functioning, and daily living skills.
Recent data indicate that several rare and highly penetrant gene variants and copy-number variations (e.g., NLGN3, NLGN4, NRXN1, SHANK2, SHANK3, PTCHD1, maternally inherited 15q11-q13, among others) are involved in ASD (Pinto et al., 2010). There is a need for translational research that can take advantage of these new genetic findings to (1) identify subgroups of individuals with ASD who respond well to specific medications and intervention approaches, (2) inform which molecular signaling pathways are affected in ASD, (3) develop animal models to explore the downstream effects of these genetic variants on brain function, and (4) discover targets for development of therapeutics. In order to develop effective medical and behavioral interventions, there is a continuing need for autism intervention networks that can provide platforms for conducting clinical trials and comparative effectiveness research using genetic and other biomarkers for specific subtypes, other individual characteristics, and their relationship to response to specific treatments for people with ASD.
In a 2010 presentation to the IACC, data were presented from the Autism Speaks–supported Autism Treatment Network (ATN) , a system of 14 academic health centers throughout the United States and Canada that provide care to more than 5,000 individuals with ASD, which showed that 65% of individuals with ASD experience sleep disturbances and 14% of those with sleep problems also have seizures (Presentation to the IACC on the Autism Treatment Network, 2010). Gastrointestinal problems were also reported in 50%, and those with gastrointestinal problems were more likely to have sleep disturbances, behavioral problems, and a lower health-related quality of life. Other health issues identified include seizures, food sensitivities, anxiety, and depression. It is not known whether these medical conditions are a primary aspect of some forms of autism or whether they are secondary features. Recent consensus statements and expert reviews indicate that assessment and treatment of such conditions can lead to improvement in behavior and quality of life (Buie et al., 2010a,b; Coury, 2010) and represent a critical unmet need and great opportunity for improving overall health and quality of life for people with ASD. The existence of co-occurring medical conditions in ASD underscores the importance of identifying subgroups of individuals with specific medical conditions who might respond favorably to a particular targeted treatment. In addition, it will be necessary to develop and test multifaceted treatment approaches (e.g., combined behavioral and medical interventions) that address co-occurring medical conditions.
In April 2010, an NIH-sponsored workshop identified the urgent need for more research on children with ASD who have not developed functional verbal language by 5 years of age (Summary of NIH Workshop on Nonverbal School-Aged Children with Autism, 2010). Among the topics discussed was the development of new intervention approaches that directly teach spoken communication skills and augmentative and alternative communication (AAC). More research is needed on the efficacy of novel service provision, education, and treatment approaches that facilitate communication skills in people with ASD who are nonverbal and in individuals with challenges in verbal ability, including the need for evidence on the utility of AAC for specific subpopulations of people with ASD. Potential areas of investigation include oral-motor skills, auditory/speech processing, social attention mechanisms, and impairments in intentional communication. In addition, research is needed on ways to improve access to AAC and the most appropriate means of AAC to utilize with specific subpopulations of individuals on the autism spectrum, including both individuals who are nonspeaking and individuals with speech that is partially or periodically limited. Comprehensive studies focusing on both adults and children on the autism spectrum should address the components of the most effective AAC approaches and factors that enhance or moderate improvements in communication, behavior and quality of life as a result of AAC usage.
Additional focus is needed to identify and address health disparities for people with ASD. While attention has been given to closing disparities in access to health care and health outcomes on the basis of race and income, little has been done to close this gap for people with developmental and intellectual disabilities, including autism (Presentation to IACC on the Eunice Kennedy Shriver National Institute of Child Health and Human Development Workshop "Disparities in the Identification of Children with ASD," 2010 (PDF – 172 KB); Videocast of NICHD Workshop on Disparities in Diagnosing ASD). Recent legislative initiatives, including the Children's Health Insurance Program Reauthorization Act (CHIPRA) and the Affordable Care Act support this research, as well as the refinement of quality-of-life measures for children, and the development of quality-of-life measures for adults (CHIPRA, 2009 (PDF – 424 KB); Patient Protection and Affordable Care Act, 2010 (PDF – 2.41 MB)). The National Core Indicators (NCI) Project (PDF – 1.64 MB), sponsored by the National Association of State Directors of Developmental Disabilities Services (NASDDDS) , has collected some data regarding quality of life specifically for people with ASD enrolled in State programs (National Core Indicators Project website ). NCI-participating States are using the data to inform their quality management processes and to improve the delivery of services and supports to people with intellectual disabilities and other developmental disabilities.
|2009||A.||Support at least three randomized controlled trials that address co-occurring medical conditions associated with ASD by 2010. IACC Recommended Budget: $13,400,000 over 3 years.|
|2009||B.||Standardize and validate at least 20 model systems (e.g., cellular and/or animal) that replicate features of ASD and will allow identification of specific molecular targets or neural circuits amenable to existing or new interventions by 2012. IACC Recommended Budget: $75,000,000 over 5 years.|
|2009||C.||Test safety and efficacy of at least five widely used interventions (e.g., nutrition, medications, assisted technologies, sensory integration, medical procedures) that have not been rigorously studied for use in ASD by 2012. IACC Recommended Budget: $27,800,000 over 5 years.|
|2009||D.||Complete two multi-site randomized controlled trials of comprehensive early intervention that address core symptoms, family functioning and community involvement by 2013. IACC Recommended Budget: $16,700,000 over 5 years.|
|2010||E.||Convene a workshop to advance the understanding of clinical subtypes and treatment personalization (i.e., what are the core symptoms to target for treatment studies) by 2011. IACC Recommended Budget: $50,000.|
|2010||F.||Launch randomized controlled trials of interventions including biological signatures and other measures to predict response, and monitor quality of life and functional outcomes in each of the following groups:
|2011||G.||Support at least five studies on interventions for nonverbal individuals with ASD by 2012. Such studies may include:
IACC Recommended Budget: $3,000,000 over 2 years.
|2011||H.||Support at least two studies that focus on research on health promotion and prevention of secondary conditions in people with ASD by 2012. Secondary conditions of interest include weight issues and obesity, injury, and co-occurring psychiatric and medical conditions. IACC Recommended Budget: $5,000,000 over 3 years.|
|2009||A.||Complete at least three randomized controlled trials on medications targeting core symptoms in people with ASD of all ages by 2014. IACC Recommended Budget: $22,200,000 over 5 years.|
|2009||B.||Develop interventions for siblings of people with ASD with the goal of reducing the risk of recurrence by at least 30% by 2014. IACC Recommended Budget: $6,700,000 over 5 years.|
|2010||C.||Conduct at least one study to evaluate the safety and effectiveness of medications commonly used in the treatment of co-occurring conditions or specific behavioral issues in people with ASD by 2015. IACC Recommended Budget: $10,000,000 over 5 years.|
|2011||D.||Support at least five community-based studies that assess the effectiveness of interventions and services in broader community settings by 2015. Such studies may include comparative effectiveness research studies that assess the relative effectiveness of:
Outcome measures should include assessment of potential harm as a result of autism treatments, as well as positive outcomes. IACC Recommended Budget: $37,500,000 over 5 years.
To fulfill the mission to "profoundly improve the health and well-being of every person on the autism spectrum across the lifespan," scientific discoveries must be implemented in communities and supported by public policy. The gap between knowledge and action can only be overcome by an aggressive focus on engaging families, people with ASD, and the services community in the research process, disseminating research findings into the community, eliminating barriers to services, and helping people with ASD and their families identify which services are needed.
The communities in which children are diagnosed vary tremendously in their ability to meet the needs of people with ASD (Shattuck & Grosse, 2007). Local school districts vary in their ability to identify and provide appropriate educational and related programs for children with ASD (Mandell & Palmer, 2005; Palmer et al., 2005). States vary in the policies they have developed to organize, finance, and deliver care. The professional infrastructure or capacity is often inadequate to provide timely diagnosis, appropriate care, services, and supports, and assure health and safety.
While remarkable improvements have been made in the past three decades in understanding the best ways to identify, assess, educate, and support people with autism and their families, these improvements rarely enter community practice. In fact, some have suggested that the lag between research and practice is close to 20 years. When services with proven efficacy are implemented in community settings, they often do not result in the same positive outcomes (i.e., they are efficacious in research settings, but not effective in community practice). The reasons for this lag and ways to improve services only recently have become an area of research in autism.
Another important issue for service delivery is that community needs far outpace the state of research. Most autism services research has focused on behavioral interventions for young children. Behavioral interventions for youth and adults, as well as community supports that address quality of life (as opposed to core symptoms) for people with autism and their families have almost no traditional evidence base to support them. Yet these types of services are some of the most requested and most needed. Providers and policy makers must therefore make decisions in the absence of evidence. Local resources, advocacy, and creativity about existing funding streams all may affect what services get funded, by whom, and for whom.
These differences in policies, resources, and organization result in marked differences in the prevalence of ASD across geographic areas, the types of services and support that are received, availability of appropriate lifespan transition opportunities, and the associated costs (Fujiura, Roccoforte & Braddock, 1994; Ganz, 2007; Järbrink, Fombonne & Knapp, 2003; Mandell et al., 2008; Ruble et al., 2005; Stahmer & Mandell, 2007). In general, children with ASD have a much more difficult time accessing appropriate services than children with other special health care needs (Krauss et al., 2003). Data are still lacking on how these differences in policy and infrastructure relate to the differences in services used, and in turn how these differences affect outcomes for children, adults, and families with ASD.
People with ASD and their families need assistance navigating complex service systems to find the most appropriate services and supports. Providers and people with ASD and their families need help choosing and implementing evidence-based services that are effective and sustainable. Policy makers and payers for services, including private insurers and school districts, need assistance creating organizational structures and financial incentives so that high-quality interventions are institutionalized. Equally important, services researchers and community organizations must collaborate to quickly and efficiently develop much-needed services and supports for underserved groups among people with ASD, and to test widely used, safe, and promising services that may not have much evidence to support them.
Strategies to educate people with ASD and their families about the best ways to obtain appropriate services and supports should be developed and tested. Methods for simplifying the process by which people access services also are needed, with a focus on improving collaboration across the many agencies that provide services to people with ASD. This is especially important for traditionally underserved groups whose members often are diagnosed late (or not at all), and who are even more likely than other people with ASD to receive inappropriate or inadequate services.
An initial part of this process is the assessment of needs and costs. Services for developmental disorders are financed largely by Federal, State, and local agencies in both the health care and education sectors. Because there are significant regional differences in ASD resources, describing this varied landscape across States and localities in the United States will provide important baseline data for those with ASD so they can appropriately seek services, and policymakers so they can appropriately plan for services. Research can also define the cost-effectiveness of evidence-based practices and thereby provide the data needed by various payers and policymakers.
Observational studies of current practice can play an important role in understanding how best to address questions surrounding services and supports. They can identify malleable barriers and appropriate points of intervention, and provide a baseline against which to measure future progress. Because service systems vary greatly from place to place, these types of studies also can take advantage of the natural experiments that occur as systems struggle to respond to the needs of people with ASD.
Experimental studies are more difficult to design and conduct in this area of science than they are for traditional intervention trials, and yet are key to understanding the best ways to improve community services. Designs such as those used in comparative effectiveness research, where both groups receive intervention (rather than having a "treatment as usual" control), will be critically important to satisfy ethical and practical concerns. Because the unit of analysis for many of these studies is the provider or system, rather than the person with ASD, large-scale network studies and quasi-experimental designs will also yield information.
Families, people with ASD, and communities can be empowered to become partners in research that can in turn inform policy. Research must include services that are built upon principles of self-direction and self-determination and emphasize quality of life across the ASD spectrum. All people with ASD, their families, and others who support them should have the services and supports they need and desire throughout the lifespan to lead productive lives in the community, and to reach their fullest potential.
Recent legislative initiatives, including the Affordable Care Act passed by Congress in 2010, support research and State and Federal programs that will positively impact health and quality of life for people with ASD. These include expanded opportunities in 2014 for individuals at 133% of the Federal poverty line to access health care; increased attention to health and medical home care coordination; expanded health information technology; a national quality improvement strategy that will develop and refine quality measures; the expansion of Medicaid options to provide home and community-based services (HCBS) through several new venues, including "targeting" to people who do not meet traditional institutional level of care program requirements, and Community First Choice services; the extension of the Centers for Medicare & Medicaid Services' (CMS) Money Follows the Person Rebalancing Demonstration Program; the CLASS Act; increased opportunities surrounding the removal of barriers to providing HCBS; incentives to offer HCBS as an alternative to nursing homes; a new focus on improved coordination for individuals eligible for both the Medicare and Medicaid programs through the Federal Coordinated Health Care Office; and establishment of the Center for Medicare & Medicaid Innovation (Innovation Center website).
The Mental Health Parity and Addiction Equity Act of 2008 (MHPAEA) (PDF – 55 KB), went into effect in 2010. Details of how parity will be implemented are still being resolved, but the concept of comparable coverage for mental health and substance use disorder benefits and physical health services has broad implications for children and adults with ASD. An interim final rule was published in February 2010 by the Departments of Labor, the Treasury, and Health and Human Services (Federal Register, 2010 (PDF – 270 KB)).
Several recent articles focused on oral health issues, highlighting a need to further investigate the impact of dental treatment on people with ASD throughout the life course. Oral disease is a major health challenge for people with developmental disabilities, including ASD (Altun et al., 2010a,b; Loo, Graham & Hughes, 2009). In 2010 and 2011, many State Medicaid programs that support adults with ASD have or will substantially reduce optional adult dental care services (Smith, Gifford & Ellis, 2010 (PDF – 3.88 MB)).
A 2010 Swedish study examining risk factors and causes of death in a cohort of 120 people with ASD found that co-occurring disorders (including sudden unexplained death in epilepsy), accidents, and deaths occurred at a rate 5.6 times higher than that of the general population (Gillberg et al., 2010). In addition, information was presented in 2010 to the IACC regarding wandering incidents, some that resulted in death (Presentation to the IACC on Wandering and ASD, 2010 (PDF – 1.27 MB)). In response, the IACC formed a Safety Subcommittee to gather information and take appropriate actions to address wandering and other important safety issues that impact the autism community.
Access to quality and affordable oral health care services continues to be a challenge for children, youth, and adults with ASD (Government Accountability Office, 2010 (PDF – 4.55 MB)). In addition, access to psychiatric expertise specific to intellectual and developmental disabilities (ID/DD) and ASD in State mental health systems is poor, overall capacity is lacking, and issues of seclusion and restraint persist (Barry, Huskamp & Goldman, 2010; Munir, 2009; Prouty et al., 2008). There is greater need during a time when disabled family members are remaining at home longer to coordinate community resources, including mental health services.
Revised in 2010
|A.||Support two studies that assess how variations in and access to services affect family functioning in diverse populations, including underserved populations, by 2012. IACC Recommended Budget: $1,000,000 over 3 years.|
|2010||B.||Conduct one study to examine how self-directed community-based services and supports impact children, youth, and adults with ASD across the spectrum by 2014. IACC Recommended Budget: $6,000,000 over 3 years.|
Revised in 2011
|C.||Implement and evaluate five models of policy and practice-level coordination among State and local agencies to provide integrated and comprehensive community-based supports and services that enhance access to services and supports, self-determination, economic self-sufficiency, and quality of life for people with ASD across the spectrum and their families, (which may include access to augmentative and alternative communication [AAC] technology), with at least one project aimed at the needs of transitioning youth and at least one study to evaluate a model of policy and practice-level coordination among State and local mental health agencies serving people with ASD, by 2015. IACC Recommended Budget: $25,000,000 over 5 years.|
|2011||D.||Support two studies to examine health, safety, and mortality issues for people with ASD by 2012. IACC Recommended Budget: $4,500,000 over 3 years.|
Revised in 2010
|A.||Test four methods to improve dissemination, implementation, and sustainability of evidence-based interventions, services, and supports in diverse community settings by 2013. IACC Recommended Budget: $7,000,000 over 5 years.|
Revised in 2010
|B.||Test the efficacy and cost-effectiveness of at least four evidence-based services and supports for people with ASD across the spectrum and of all ages living in community settings by 2015. IACC Recommended Budget: $16,700,000 over 5 years.|
|2010||C.||Evaluate new and existing pre-service and in-service training to increase skill levels in service providers, including direct support workers, parents and legal guardians, education staff, and public service workers, to benefit the spectrum of people with ASD and to promote interdisciplinary practice by 2015. IACC Recommended Budget: $8,000,000 over 5 years.|
|2011||D.||Evaluate at least two strategies or programs to increase the health and safety of people with ASD that simultaneously consider principles of self-determination and personal autonomy by 2015. IACC Recommended Budget: $2,000,000 over 2 years.|
|2011||E.||Support three studies of dental health issues for people with ASD by 2015. This should include:
An overarching goal of ASD research is to enable people with ASD to lead fulfilling and productive lives in the community. We are in critical need of information about the current landscape of long-term outcomes for all people with ASD across the spectrum. The lack of knowledge about adults with ASD and their lifetime support needs has repeatedly arisen as a critical issue when stakeholders are queried about their most fundamental concerns. Longitudinal studies designed to capture the range of possible outcomes for people with ASD are best suited to inform public policy decision-making, service and support delivery, and funding strategies. It is also important to improve public understanding of ASD in adults, including older adults, so that they may receive support from the communities where they live. Efforts to improve public awareness and community supports help foster acceptance, inclusion, and appreciation of people with ASD.
ASD poses economic and social costs for people with ASD, their families, and society at large. Although ASD symptoms vary greatly in character and severity, autism occurs in all ethnic and socioeconomic groups and affects every age group. Some scientists and economists have estimated that the combined direct and indirect costs to provide lifelong supports for all Americans with ASD exceeds $35 billion, and that each person accrues approximately $2 million to $3 million in costs over his or her lifetime (Ganz, 2007; Knapp, Romeo & Beechum, 2009). Families often report incurring large debts related to medical and educational services not covered through public programs or medical and dental insurance. Many families find the transition from the education system, where services are mostly obligatory, to the developmental disabilities and vocational systems, where services are optional, difficult to understand and manage. This fragmentation of service systems impedes access to services, especially for youth transitioning to adulthood, as well as during other periods of transition. In addition to financial challenges, ASD can lead to emotional hardships for people with ASD and their families throughout life.
Although considerable research has focused on the earliest phase of ASD, including early screening, improved diagnostics, and early intervention, far less effort has addressed the adolescent, adult, and older adult phases of life. Minimal guidance exists for people with ASD across the spectrum and their families about the trajectories of ASD across the lifespan. Although the general assumption is that children who possess expressive and receptive language skills and coping strategies and who do not demonstrate significant challenging behaviors can sometimes excel as adults, while children who do not currently possess typical expressive language skills and who engage in significant challenging behavior will grow up to need long-term, 24/7 supports and services, the evidence base for these ideas is lacking. Scientists have not yet identified key prognostic factors or detailed information about how adults across the spectrum with ASD function, where they are, and how they are best supported.
More research is needed to tailor treatments, interventions, and services and supports to the evolving needs of adolescents transitioning to adulthood, and adults across the spectrum with ASD, with an emphasis on principles of self-determination. There is a need to address co-occurring conditions and developmental changes that coincide with transitions such as adolescence to adulthood to better assess functional outcomes and to integrate standardized quality-of-life measures for adults across the spectrum with ASD living in community settings. Factors that contribute to improved quality-of-life and health outcomes in adulthood are virtually unknown.
A number of other areas raise serious concerns. There is little information about the number of adults with ASD within the criminal justice system. Some adults with ASD may not be diagnosed, or may have been misdiagnosed. Although issues surrounding the direct support workforce are well documented, we do not know if they differ with respect to adults with ASD. Community integration and access to individualized, quality adult supports and services are problematic across the United States, and long waiting lists for subsidized community-based services persist. Many services are available only to people who meet institutional level of care requirements. Additionally, there is scant research on the use and safety of psychopharmaceutical medications in adults with ASD.
The continuing lack of services research on youth and adults diagnosed with ASD (as well as those who go undiagnosed), public comment received by the IACC in 2010, and the 2008 and 2009 IACC ASD Research Portfolio Analysis reports continue to highlight the urgent need for additional scientific research specific to this group (IACC, 2010a,b (PDF – 1.7 MB)). In 2010, several national advocacy organizations devoted private resources to initiatives on adult services that have been brought to the IACC's attention.
In September 2010, the Department of Health and Human Services (HHS) announced a joint grant program administered by the Centers for Medicare & Medicaid Services (CMS) and the Administration on Aging, in part to expand the Aging and Disability Resource Centers to better assist people with disabilities, older adults, and their caregivers (HHS Press Release, 2010). As greater numbers of adults with disabilities, including ASD, access the strengthened infrastructure, more research is needed regarding their support needs. To help define a national research agenda on autism and aging, a privately funded conference, "Autism and Aging," was held in March 2010 that brought experts in the field together to discuss what is currently known on the subject and what future research is needed. Participants identified several priority areas, including the development of diagnostic criteria and instruments for diagnosing and assessing the needs of older adults with ASD. They also cited the need for descriptive studies that examine the symptoms and behaviors, neuropsychiatric features, and related medical conditions in the population, as well as the progression of these characteristics over time (Piven et al., 2010).
Several articles related to transitioning from entitlement-based education services to the adult services system and higher education were published in 2010 (Chappel & Somers, 2010 ; McDonough & Revell, 2010 ; Schall & McDonough, 2010 ; Wehmeyer et al., 2010 (PDF – 811 KB)). These indicated that early collaboration between services system partners greatly increased access to adult services and employment. A small survey of Japanese adults with ASD who did not have intellectual disability suggested that higher levels of education increased the likelihood of obtaining employment, but that education did not improve the likelihood that the job would be retained (Yokotani, 2010). Studies from the United States indicated that the transition from high school may actually have the most negative impact on individuals with higher cognitive levels, who are more likely to lose services (Taylor et al., 2010a,b).
In July 2010, President Obama indicated the Administration's commitment to expand disability employment in the Federal workforce, emphasizing the need for additional research in the area of ASD employment across the spectrum.
In other new research, recent studies examining the role of behaviors and co-occurring conditions in adults with ASD indicated that many people with ASD, especially those with intellectual and developmental disabilities (ID/DD), have ongoing deficits related to independence and quality of life (Chowdhury, Benson & Hillier, 2010; Cohen et al., 2010; Esbensen et al., 2010; Hove & Havik, 2010; Smith & Matson, 2010a,b).
A 2010 article on the prevalence of ASD in Iceland also indicated that ASD may be about 50% underdiagnosed in adults, especially in people who have ID as their primary diagnosis (Saemundsen et al., 2010). This finding is consistent with recent State data specific to ASD from the National Core Indicators Project, sponsored by the National Association of State Directors of Developmental Disabilities Services (NASDDDS) (National Core Indicators Project website ).
Finally, an environmental scan of interventions for people with ASD, sponsored by the Centers for Medicare & Medicaid Services, examined interventions for adults with ASD and found effectiveness for only nine interventions for adults (Young et al., 2010 (PDF – 2.44 MB)). Only a third of the interventions evaluated rated as "evidence-based." The report also highlighted the need for further research on effective community-based services for adults. For example, adults with ASD commonly attend "day programs," but no formal research exists on the practice.
Although some minimal improvement is predicted for State budgets in 2011, State and local governments are anticipated to face continuing fiscal constraints (National Governors Association & National Association of State Budget Officers , 2010). Budget cuts, somewhat mitigated by ongoing Federal financial assistance, have resulted in fewer optional services in programs including Medicaid, which provide many poor adults who have ASD with acute care, home- and community-based services, and other supports (Johnson, Oliff & Williams, 2010 (PDF – 751 KB)).
There is little research specific to older adults with autism and their caregivers, although some research from the University Centers for Excellence in Developmental Disabilities (UCEDD) program, supported by the Administration on Developmental Disabilities (ADD) and Administration for Children and Families (ACF), is directed at cross-disability aging issues (Association of University Centers on Disabilities website ). Although some research is focused on adults on the ASD spectrum and their families, more is needed, including greater utilization of the participatory action research (PAR) and community-based participatory research (CBPR) models (Viswanathan et al., 2004 (PDF – 3.14 MB)). The Administration on Developmental Disabilities (ADD) supported development of a PAR Toolkit, which could serve as a potential resource (Oregon Health & Science University, PAR Toolkit ).
|2010||A.||Launch at least two studies to assess and characterize variation in the quality of life for adults on the ASD spectrum as it relates to characteristics of the service delivery system (e.g., safety, integrated employment, post-secondary educational opportunities, community inclusion, self-determination, relationships, and access to health services and community-based services) and determine best practices by 2012. IACC Recommended Budget: $5,000,000 over 3 years.|
|2010||B.||Evaluate at least one model, at the State and local level, in which existing programs to assist people with disabilities (e.g., Social Security Administration, Rehabilitation Services Administration) meet the needs of transitioning youth and adults with ASD by 2013. IACC Recommended Budget: $5,000,000 over 3 years.|
|2010||C.||Develop one method to identify adults across the ASD spectrum who may not be diagnosed, or are misdiagnosed, to support service linkage, better understand prevalence, and track outcomes with consideration of ethical issues (insurance, employment, stigma) by 2015. IACC Recommended Budget: $8,400,000 over 5 years.|
|2010||D.||Conduct at least one study to measure and improve the quality of lifelong supports being delivered in community settings to adults across the spectrum with ASD through provision of specialized training for direct care staff, parents, and legal guardians, including assessment and development of ASD-specific training, if necessary, by 2015. IACC Recommended Budget: $7,500,000 over 5 years.|
|2010||A.||Develop at least two individualized community-based interventions that improve quality-of-life or health outcomes for the spectrum of adults with ASD by 2015. IACC Recommended Budget: $12,900,000 over 5 years|
|2010||B.||Conduct one study that builds on carefully characterized cohorts of children and youth with ASD to determine how interventions, services, and supports delivered during childhood impact adult health and quality of life outcomes by 2015. IACC Recommended Budget: $5,000,000 over 5 years.|
Revised in 2011
|C.||Conduct comparative effectiveness research that includes a cost-effectiveness component to examine community-based interventions, services, and supports to improve health outcomes and quality of life for adults on the ASD spectrum over age 21 by 2018. Topics should include:
IACC Recommended Budget: $6,000,000 over 5 years.
|2010||D.||Conduct implementation research to test the results from comparative effectiveness research in real-world settings, including a cost-effectiveness component to improve health outcomes and quality of life for adults over 21 on the ASD spectrum by 2023. IACC Recommended Budget: $4,000,000 over 5 years.|
Current infrastructure may be insufficient to adequately support the research programs outlined in this plan. Additional investment in infrastructure is necessary to collect and share data among researchers, to encourage and enable individuals with ASD and their families to participate in research, and to improve the speed with which findings are disseminated and the extent to which findings are translated into practice and policy.
In 2006, the National Institutes of Health (NIH) launched the National Database for Autism Research (NDAR) to improve sample sizes and enable researchers to share data for increased analyses. The NIH-supported national Autism Centers of Excellence (ACE), as well as the grants funded under the "Research to Address the Heterogeneity in Autism Spectrum Disorders" request for applications as part of the American Recovery and Reinvestment Act (ARRA), receive funding contingent upon acceptable plans and means for data sharing. Incentives are needed, however, to encourage data submission by other researchers. It will also be necessary to link other significant ASD databases with NDAR. In addition, databases that collect information and coordinate recruitment of people with ASD and their families to participate in research studies need to be enhanced and expanded. Programs to support contribution of data for recruitment, health care, education, social services, and administrative databases, like the Interactive Autism Network (IAN) , collaboratively supported at the Kennedy Krieger Institute by Autism Speaks , the Simons Foundation , and NIH, should be encouraged. Collecting information about people with ASD will facilitate the study of whether early diagnosis, entry to services, and type of intervention affects the course of ASD over time. Multiple data sources from existing research or service systems (e.g., education, Medicaid) currently operate in isolation. In compiling and sharing data from existing data sources, researchers need to address data standardization as well as important privacy and ethical issues. Methods for merging such databases and linking investigator-recruited samples to these merged databases have been used in other populations and in specific locales with success and need to be further developed.
Many in the field have highlighted the need to establish nationally coordinated strategies for the collection and preservation of postmortem tissue from people both with and without ASD. The existing brain and tissue bank resources must be expanded to meet the high and continuously increasing demand for postmortem tissue by scientific investigators. More well-preserved brains are needed from people at various stages of development, and particularly from those with few co-occurring disorders. Additional matched controls are needed as well to supplement the limited supply in existing repositories.
In addition, it will be necessary to develop methods, standards, and protocols for collecting and storing other biological specimens, such as blood and urine, which might be used to study biological differences or signatures, and skin fibroblasts for creation of pluripotent stem cells.
Autism surveillance provides important estimates on the number of children affected with ASD and helps describe the characteristics of the people with autism spectrum disorders in the general population. Surveillance must be sustained over a period of many years in order to track trends in prevalence estimates over time and is an essential building block for population-based research, providing clues about potential risk factors that warrant further study. Surveillance provides important data regarding early identification of children with autism and informs education and health systems of areas in which programs can be modified to improve early identification and intervention. Surveillance data also provide critically important information for communities to use when planning for services.
In 2007, CDC's Autism and Developmental Disabilities Monitoring (ADDM) Network published the first and most comprehensive summary of autism prevalence estimates in the United States (CDC, 2007). These data showed that between 1 in 100 to 1 in 300 (with an average of 1 in 150 children) were identified with ASD. In October 2009, investigators from HRSA and CDC reported that ASD occurs in an estimated 1.1% of children 3 to 17 years old, based on parent report during the National Survey of Children's Health (NSCH), sponsored by HRSA (Kogan et al., 2009). Updated estimates from CDC's ADDM Network, published in December 2009, confirmed that approximately 1% of children were identified with an ASD (between 1 in 80 to 1 in 240 children, with an average of 1 in 110) (CDC, 2009). There was an increase of 57% in identified ASD prevalence from 2002 to 2006 in multiple areas of the United States. While these data provide important information for service planning and begin to help us understand that the increases are not fully accounted for by improved identification, many questions related to the multiple causes of ASD increases remain.
There are a number of areas in which prevalence studies could be improved, including the continued estimation and evaluation of prevalence in the same population over time; assessment of ASD prevalence in the context of other neurodevelopmental disorders; further analyses of existing datasets to examine the multiple identification and potential risk factors as they vary by prevalence; collection of data beyond core ASD symptoms, including genetic data and co-occurring medical, dental, and behavioral conditions; and expansion of studies across ages. Supporting international autism surveillance activities, prevalence estimates, and epidemiologic research will also be important, in order to compare prevalence estimates and epidemiologic characteristics across countries.
Research data regarding autism is now being published at a rapid rate. It is critical that new findings are communicated promptly and appropriately to the public so that research findings can be better translated into practice as appropriate. Effective translation is important so that new findings can be utilized to improve risk assessment and implementation of individualized interventions to reduce the disabling symptoms and promote a positive developmental trajectory as early as possible. Additional attention needs to be paid to improving the communication channels between scientists, practitioners, people with ASD, and their families.
There is also need to build a system for rapid replication of studies concerning key findings. In addition, there is still not agreement about meaningful subtypes or about how to individualize treatment. As more professionals become involved in autism research, there is a need for organized input from established scientists to provide guidance and expertise.
In addition, it will be necessary to identify and address the wide range of ethical and clinical issues related to the diagnosis, assessment, and communication of genetic, environmental, and clinical risk for autism.
In order to accomplish the necessary research in the field of autism, it will also be important to develop an adequate scientific workforce. While much autism research is already under way, there are several areas of research that are new and growing, including interdisciplinary research, where additional researchers will be needed in the coming years. The continued expansion and development of this research workforce will be essential to fulfilling the goals laid out in the IACC Strategic Plan.
This year, the Autism Informatics Consortium (AIC), collaboratively supported by NIH, Autism Speaks , and the Simons Foundation , was launched with the goal of accelerating scientific discovery by making informatics tools and resources more useful to, and usable by, autism researchers. The consortium is charged with identifying information technology solutions, harmonizing major informatics frameworks, and developing standards in the field for working with research data. The consortium is composed of representatives from both public and private institutions that are responsible for the development of major autism informatics tools and resources. Current members include the Autism Genetic Resource Exchange (AGRE) , supported by Autism Speaks; the Interactive Autism Network (IAN) at the Kennedy Krieger Institute , supported by NIH, Autism Speaks, and the Simons Foundation; the Simons Foundation; Prometheus Research , supported by the Simons Foundation Autism Research Initiative (SFARI) ; and the National Database for Autism Research (NDAR), supported by NIH. The AIC held its first workshop on August 26-27, 2010, at the National Institute of Mental Health (NIMH)/NIH offices in Rockville, MD. In attendance were representatives from 12 major research institutions. The objective of the meeting was to explore short-term (one to two years) and intermediate term (two to five years) priorities for increasing the utility and harmonization of major autism research informatics resources, identify ways to best pursue those priorities, and determine ways to measure progress toward achieving them.
Considerable progress has been made on the input of data to NDAR. Data are now available to researchers from more than 10,000 participants enrolled in studies of ASD. Access to the data is through a NDAR-supported webportal that allows queries from multiple databases simultaneously.
There has been considerable progress in the growth of a number of major biobank repositories.
The Autism Treatment Network (ATN) , a program Autism Speaks funded in part through grants from HRSA and NIMH, is a collaboration among 14 academic medical centers that provide clinical services for children with ASD and collect and store common, extensive phenotypic data on children with autism in a central patient registry. The NIMH is supporting ATN efforts to collect DNA, plasma, and urine from 4 of the 14 sites as a beginning step toward establishing a comprehensive biorepository for the ATN. One goal of establishing the repository is to provide a platform for conducting comparative effectiveness research that can utilize biomarkers to predict response to treatments.
The Simons Simplex Collection , supported by the Simons Foundation Autism Research Initiative (SFARI), was established to develop a permanent research repository of detailed phenotypic and genetic information on 3,000 simplex families with a child with an ASD. Nearly 2,000 families had been enrolled as of November 2010, with the goal of completing enrollment by the summer of 2011 (Fischbach & Lord, 2010).
The Autism Genome Project (AGP) , a collaborative effort between Autism Speaks and several other international partners, including the Health Research Board of Ireland , Genome Canada, the United Kingdom's Medical Research Council (MRC) and the Hilibrand Foundation , is focusing on identifying genes associated with the risk for ASD. The AGP consists of 120 scientists from more than 60 institutions representing 11 countries. The biobank now contains 23,101 total samples, including 5,814 probands (individuals who are the first member within their family identified as having an ASD).
The Autism Genetic Resource Exchange (AGRE) is a program of Autism Speaks to advance genetic research in autism spectrum disorders. Genetic biomaterials and clinical data are obtained from multiplex families (i.e., families with more than one member diagnosed with an ASD). The biological samples, along with the accompanying clinical data, are made available to AGRE-approved researchers. There are more than 10,000 samples in the AGRE repository on individuals with ASD and their family members (including 4,240 probands). About half of the samples in AGRE are also represented in the AGP.
Through the Center for Collaborative Genetic Studies on Mental Disorders , the NIMH/NIH supports the NIMH Genetics Repository, a collection of DNA, cell culture lines, and clinical data from individuals with complex mental disorders, including ASD. From these materials, researchers can discover gene variants, epigenetic signals, and biomarkers that identify disease risk, aid in diagnosis, and predict response to treatments. Beginning in 2008 and continuing through 2013, the NIMH is sponsoring the Human Genetics Initiative to expand the number of samples in the NIMH Genetics Repository. The current biobank collection consists of 589 trios (biomaterials from an ASD-affected individual and both parents), 513 partial trios with biomaterials from one parent, and 972 independent cases. In addition, more than 1,400 ASD samples are being processed and are expected to be available shortly. The Human Genetics Initiative works collaboratively with AGRE and offers access to much of the AGRE collection, as well as samples from the NIMH Genetics Repository. In the coming years, NIMH will focus on increasing the number of samples, particularly from parents and first-degree relatives, and linking the ASD-relevant data with the National Database for Autism Research.
The Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)/NIH supports the Brain and Tissue Bank for Developmental Disorders program, which collects, stores, and distributes brain and other tissues for biomedical research. The bank was expanded in 2009 and is currently funded through 2014. To date, researchers can request tissue samples donated by about 60 ASD individuals, as well as tissues from autism-related disorders like fragile X (20 cases), tuberous sclerosis complex (33 cases), neurofibromatosis (18 cases), and Rett syndrome (10 cases). The use of this tissue has resulted in 77 scientific papers on autism and 42 papers on the other disorders. While efforts to recruit donors have had a positive impact, there is still a great unmet need for ASD tissue collection and distribution across the ASD research community.
The Autism Tissue Program (ATP) , a clinical program of Autism Speaks, is dedicated to supporting scientists worldwide in their efforts to understand autism, autism-related disorders and the human brain. The ATP makes postmortem brain tissue available to as many qualified scientists as possible to advance research on autism and other related neurological conditions. Toward that end, the ATP has acquired 150 whole brain donations from individuals with autism, autism-related disorders, their relatives, and controls, while making all tissue and comprehensive phenotype data available to the research community.
One area that has progressed is the establishment of systems to identify and monitor the prevalence of ASD in the United States. The CDC's ADDM Network (CDC, 2009) and a report from the HRSA-sponsored National Survey of Children's Health (Kogan et al., 2009) reported ASD prevalence of around 1% of children. Of great concern was the average increase of 57% from 2002 to 2006 in 10 areas of the United States covered by the ADDM Network (CDC, 2009). While some of the increase was attributed to improved identification of particular subgroups, such as Hispanic children and children without cognitive impairment, a true increase in risk is also possible (CDC, 2009). Several other recent studies have also indicated that multiple identification factors contribute to, but do not fully explain, the rising ASD prevalence (Hertz-Picciotto & Delwiche, 2009; Saemundsen et al., 2010; King & Bearman, 2009; Rice et al., 2010; van Meter et al., 2010; Mazumdar et al., 2010). Concerted efforts are now needed to evaluate the reasons behind these changes.
Of particular importance is the rapid translation of research findings as they apply to intervention and the dissemination to families and practitioners in the community in a way that is easy to access and understand. There have been several reviews of intervention quality and effectiveness (Young et al., 2010 (PDF – 2.44 MB); Lang et al., 2010), and several States have formed task forces or councils for ASD and other developmental disability (DD) services and have compiled service plans based on the current state of knowledge (Summary of the Massachusetts Act Early State Team Autism Summit ).
In October 2010, the Administration on Developmental Disabilities (ADD)/Administration for Children and Families (ACF) awarded The Arc of the United States $1.87 million for fiscal year 2010 to establish a National Resource and Information Center on ASD and other developmental disabilities. The Autism NOW Project is collaborating with several partners, including the Autistic Self Advocacy Network (ASAN) , the Autism Society , and several ADD Network entities to engage and leverage a national network of disability, aging, and family organizations. The center will provide high-quality resources and information related to community-based services that support independent living and self-determination, treatment protocols that promote community-based experiences (e.g., education, employment, recreation, transportation, early intervention, and child care), and evidence-based interventions. The intended audience for the center includes people with ASD, family members, service providers, researchers, and the general public. The center will also host a parent-to-parent call-in center for families addressing issues relating to autism and other developmental disabilities.
In 2009, NIH supported 60 trainees (graduate students and postdoctoral fellows) through individual NIH training and fellowship grants to study autism. These are in addition to a large number of trainees supported by NIH in 2009 on more than 200 traditionally funded NIH research project grants focused on autism, as well as more than 100 new autism-related research projects funded under the American Recovery and Reinvestment Act (ARRA). Private research organizations such as Autism Speaks and the Autism Science Foundation also supported several research training awards in 2009 and 2010.
The Autism Informatics Consortium (AIC) identified several short-term and long-term priorities for increasing the utility and harmonization of major autism research informatics resources, identifying ways to best pursue those priorities, and determining ways to measure progress toward achieving them. Examples of gap areas identified include the need for improved options for data federation, query interfaces, and languages; genetic visualization tools; file and data set management; data quality and validation rules and algorithms; data dictionaries and ontologies; standardizing globally unique identifier (GUID) usage; procedures for maintaining phenotype resources with associated biospecimens (i.e., imaging and genetics); defining a core (clinical) phenotype battery; working with publishers of copyrighted assessments; and addressing concerns about intellectual property.
During 2010, the Affordable Care Act was passed with an unprecedented call to transition record keeping to electronic health records (EHRs). The development of EHRs provides an opportunity to consider the use of EHRs for data collection and analyses related to the service needs of people with ASD. Of course, important privacy issues need to be considered and addressed before these types of data could be more routinely collected and utilized as part of EHRs.
In the absence of biological markers, current approaches for stratification of individuals with ASD into clinically meaningful subgroups have relied on behavioral characteristics. However, the variability of behavioral, medical, and developmental concerns that affect individuals with ASD has made it extremely difficult to predict which treatments work best for which individuals. The integration of biologic information into phenotype selection algorithms can help to guide the development and evaluation of more targeted and effective therapeutics and significantly improve the prediction of a therapeutic response. To this end, there is a need for the establishment of a robust network of clinical research sites offering clinical care in real-world settings that can collect and coordinate standardized and comprehensive diagnostic, biological (e.g., genotype), medical, and treatment history data that would provide a platform for conducting comparative effectiveness research and clinical trials of novel autism treatments. Currently, there is a need for high-throughput screening tools to quickly evaluate gene-environment interactions relevant to ASD (e.g., induced pluripotent stem cells). Lack of progress in this area has made identification of potential exposures of interest difficult and driven by anecdotal evidence.
Moving forward, there is a need to maintain the sites so that early prevalence and population characteristics can be compared over time. A particular challenge is keeping consistency in the number of sites with four-year funding cycles and different numbers of sites funded based on availability of funds. In addition, completeness of data collection is hindered in some sites by the lack of access to educational records for surveillance purposes. Despite these challenges, the CDC's ADDM Network has maintained a core of approximately 12 sites with multiple prevalence years completed. There is now a need to go further to understand how multiple identification and potential risk factors have influenced the increasing estimates of ASD prevalence. Further analyses of existing datasets are needed to examine any relationship between changes in ASD prevalence and changes in potential risk factors in the population. Surveillance cohorts also provide the opportunity for communities and policy makers to use these data for resource allocation in addition to characterizing population-based identification patterns and gaps. Surveillance data can also be used to better characterize the population of children identified with an ASD by select characteristics, such as level of cognitive impairment, subtypes as diagnosed by community professionals, diagnostic features, associated conditions, and degree of impairment by clinician rating. Expansion of surveillance efforts are needed to improve early identification and to understand functioning and outcome of individuals with an ASD as adults.
There have been several reviews of intervention quality and effectiveness, and several States or agencies (e.g., Governor's councils, task forces and the Department of Education) have developed plans for ASD and other DD services based on the current state of knowledge. This information and these plans should be easily accessible to other communities. Right now, there are many public and private resources that work to compile services and supports information; however, finding this information can be challenging.
Focusing more on the issue of translating research into practice, the IACC Services Workshop on November 8, 2010, called for research that is meaningful to teachers and family members and conducted in non-clinical settings to better simulate the settings in which children with ASD are being served. This will help to ensure that students with ASD receive high-quality special education services.
The Agency for Healthcare Research and Quality (AHRQ) has ongoing efforts related to translation of research into practice. This work includes identifying sustainable and reproducible strategies (1) to help accelerate the impact of health services research on direct patient care and (2) to improve the outcomes, quality, effectiveness, efficiency, and/or cost-effectiveness of care through partnerships between health care organizations and researchers. To further address the challenges around dissemination of research findings, AHRQ developed a "knowledge transfer framework," which encompasses three major stages: knowledge creation and distillation; diffusion and dissemination; and end user adoption, implementation, and institutionalization. While this work is not specific to autism, it may provide a useful framework to guide autism research translation efforts.
Ongoing investment in developing research expertise and facilitating careers in autism research is needed, especially in the emerging areas of health services research, translational research, and international collaborative studies. In addition, continued efforts to enhance diversity in the research workforce are needed, including efforts to include people with disabilities and in particular individuals with ASD. Funds from the American Recovery and Reinvestment Act (ARRA) increased investments in ASD research, which contributed to recent expansion of the research workforce (particularly the number of graduate and postdoctoral students working in the field). With ARRA funding ending in 2011 and the potentially constrained fiscal climate anticipated for fiscal years 2011 and 2012, there is growing concern about the ability for both Federal and private entities to support recent gains in the research workforce.
|2009||A.||Conduct a needs assessment to determine how to merge or link administrative and/or surveillance databases that allow for tracking the involvement of people living with ASD in health care, education, and social services by 2009. IACC Recommended Budget: $520,000 over 1 year.|
Revised in 2011
|B.||Conduct an annual "State of the States" assessment of existing State programs and supports for people and families living with ASD by 2011. IACC Recommended Budget: $300,000 each year.|
|2009||C.||Develop and have available to the research community means by which to merge or link databases that allow for tracking the involvement of people in ASD research by 2010. IACC Recommended Budget: $1,300,000 over 2 years.|
|2009||D.||Establish and maintain an international network of biobanks for the collection of brain tissue, fibroblasts for pluripotent stem cells, and other tissue or biological material, by acquisition sites that use standardized protocols for phenotyping, collection, and regulated distribution of limited samples by 2011. (Revised 2011)
IACC Recommended Budget: $82,700,000 over 5 years.
|2010||E.||Begin development of a web-based toolbox to assist researchers in effectively and responsibly disseminating their findings to the community, including people with ASD, their families, and health practitioners, by 2011. IACC Recommended Budget: $400,000 over 2 years.|
|2010||F.||Create funding mechanisms that encourage rapid replication studies of novel or critical findings by 2011.|
|2010||G.||Develop a web-based tool that provides population estimates of ASD prevalence for States based on the most recent prevalence range and average identified by the ADDM Network by 2012. IACC Recommended Budget: $200,000 over 2 years.|
|2010||H.||Create mechanisms to specifically support the contribution of data from 90% of newly initiated projects to the National Database for Autism Research (NDAR), and link NDAR with other existing data resources, by 2012. IACC Recommended Budget: $6,800,000 over 2 years.|
|2010||I.||Supplement existing ADDM Network sites to use population-based surveillance data to conduct at least five hypothesis-driven analyses evaluating factors that may contribute to changes in ASD prevalence by 2012. IACC Recommended Budget: $660,000 over 2 years.|
|2010||J.||Develop the personnel and technical infrastructure to assist States, territories, and other countries that request assistance describing and investigating potential changes in the prevalence of ASD and other developmental disabilities by 2013. IACC Recommended Budget: $1,650,000 over 3 years.|
|2010||K.||Encourage programs and funding mechanisms that expand the research workforce, enhance interdisciplinary research training, and recruit early-career scientists into the ASD field by 2013. IACC Recommended Budget: $5,000,000 over 3 years.|
Revised in 2011
|L.||Expand the number of ADDM sites in order to conduct ASD surveillance in children and adults; conduct complementary direct screening to inform completeness of ongoing surveillance; and expand efforts to include autism subtypes by 2015. IACC Recommended Budget: $16,200,000 over 5 years.|
|2010||M.||Support 10 "Promising Practices" papers that describe innovative and successful services and supports being implemented in communities that benefit the full spectrum of people with ASD, which can be replicated in other communities, by 2015. IACC Recommended Budget: $75,000 over 5 years.|
|2011||N.||Enhance networks of clinical research sites offering clinical care in real-world settings that can collect and coordinate standardized and comprehensive diagnostic, biological (e.g., DNA, plasma, fibroblasts, urine), medical, and treatment history data that would provide a platform for conducting comparative effectiveness research and clinical trials of novel autism treatments by 2012. IACC Recommended Budget: $1,850,000 over 1 year.|
|2011||O.||Create an information resource for ASD researchers (e.g., PhenX Project ) to share information to facilitate data sharing and standardization of methods across projects by 2013.
IACC Recommended Budget: $2,000,000 over 2 years.
|2011||P.||Provide resources to centers or facilities that develop promising vertebrate and invertebrate model systems, and make these models more easily available or expand the utility of current model systems, and support new approaches to develop high-throughput screening technologies to evaluate the validity of model systems by 2013. IACC Recommended Budget: $1,100,000 over 2 years.|
Below is a list of currently available resources for conducting ASD research. It includes government and nongovernment resources spanning topics such as genetics, bioinformatics, brain and tissue samples, and animal resources, as well as resources related to surveillance, prevalence, and services.
ADDM (Autism and Developmental Disabilities Monitoring) Network
A surveillance network that provides data about ASD prevalence and describes the population of children with ASD. Supported by CDC.
AutismNOW: The National Autism Resource and Information Center
A center that provides access to resources and information on community-based services and interventions for people with ASD and their families, through a national dissemination network, regional events, training and technical assistance, and the web. Supported by the Administration on Developmental Disabilities/Administration for Children and Families.
CADDRE (Centers for Autism and Developmental Disabilities Research and Epidemiology)
Regional centers of excellence for ASD and other developmental disabilities, which are currently conducting the largest U.S. study of ASD risk factors. Supported by CDC.
National Children's Study
A population-based study of environmental influences on child health and development that could be used to investigate the relationship between genetic and environmental risk markers and ASD diagnosis. Supported by NIH.
NDAR (National Database for Autism Research)
A secure bioinformatics platform for scientific collaboration and data sharing between ASD investigators. Supported by NIH.
NDAR Data Definition
Provides data definitions of ASD research terminology. Supported by NIH.
NICHD Brain and Tissue Bank
A brain tissue repository to support and enhance the acquisition and distribution of tissue samples from deceased individuals diagnosed with intellectual and developmental disabilities for use in research studies. Supported by NIH.
NIF (Neuroscience Information Framework)
A dynamic inventory of web-based neuroscience resources that enables discovery and worldwide access to these resources through an open source, networked environment. The NeuroLex project, within NIF, is a dynamic lexicon to improve communication among neuroscientists about their data by standardizing neuroscience terminology. Supported by NIH.
NIH Blueprint Non-Human Primate Atlas
An atlas mapping the expression of particular genes to specific neuroanatomical locations across several time points in development in the rhesus monkey. Supported by NIH.
NIH Pediatric MRI Data Repository
A multi-site longitudinal study using technologies (anatomical magnetic resonance imaging [MRI], diffusion tensor imaging [DTI], and magnetic resonance spectroscopy [MRS]) to map pediatric brain development. Supported by NIH.
NIMH Center for Collaborative Genetic Studies of Mental Disorders
A repository of biospecimens from individuals with mental illnesses such as schizophrenia, bipolar disorder, autism spectrum disorders, depression, and obsessive-compulsive disorders. Supported by NIH.
NIMH Transcriptional Atlas of Human Brain Development
A foundational resource created using funds from the American Recovery and Reinvestment Act (ARRA) for studying transcriptional mechanisms involved in human brain development. Supported by NIH.
NITRC (Neuroimaging Informatics Tools and Resources Clearinghouse)
A neuroimaging tools repository, NITRC facilitates finding and comparing neuroimaging resources for functional and structural neuroimaging analyses. Supported by NIH.
AGRE (Autism Genetic Resource Exchange)
A repository for biomaterials and associated phenotype and genotype information from more than 1,000 individuals with an ASD diagnosis and their families. Supported by Autism Speaks .
ALLEN Human Brain Atlas
A unique multi-modal atlas of the human brain that integrates anatomic data (MRI, DTI, histology) and gene expression data (microarray, in situ hybridization), coupled with a suite of visualization and mining tools, to create an open public resource for brain researchers and other scientists across a wide range of specialties, including autism. Maintained by the Allen Institute for Brain Science .
Autism Genome Project
A study to find the genes associated with inherited risk for autism. Supported by Autism Speaks and other partners, including the Health Research Board of Ireland, Genome Canada, the United Kingdom's Medical Research Council (MRC), and the Hilibrand Foundation .
Autism Induced Pluripotent Stem Cell (iPSC) Biorepository (ASCB)
A biorepository of fibroblast and iPSC lines cultured from patients with idiopathic autism as well as patients with FMR1 gene mutations. Maintained by the National Human Neural Stem Cell Resource at the Children's Hospital of Orange County and fully supported by the NIH.
Autism Tissue Program
An ASD brain tissue repository. Supported by Autism Speaks .
Autism Treatment Network
A network of hospitals and physicians dedicated to developing a model of comprehensive medical care for children and adolescents with autism. A program of Autism Speaks funded in part through grants from HRSA and NIH.
A biobank of cell lines and DNA samples from autistic individuals and family members with corresponding detailed clinical diagnoses. The biobank is maintained and fully supported by Coriell Institute for Medical Research , in collaboration with the University of Medicine and Dentistry, Robert Wood Johnson Medical School , New Jersey.
High Risk Baby Siblings Research Consortium
A consortium studying the infant siblings of children with ASD in order to identify early behavioral and biomedical markers of the disorder. Supported by Autism Speaks and NIH.
IAN (Interactive Autism Network)
An online registry of more than 35,000 people who have or are related to those with ASD. Collaboratively supported at the Kennedy Krieger Institute by Autism Speaks , the Simons Foundation , and NIH.
ISAAC (Internet System for Assessing Autistic Children)
A web-based application for administering and managing health research projects/studies and the associated data. Supported by Autism Speaks .
REDCap (Research Electronic Data Capture)
Two secure, web-based applications (REDCap and REDCap Survey) designed to support data capture for research studies. Maintained by the REDCap Consortium , comprised of 194 active institutional partners.
SFARI Gene / AutDB (Autism Database)
A publicly available webportal for ongoing collection, manual annotation, and visualization of genes associated with autism from the published literature. SFARI Gene is licensed by the Simons Foundation from MindSpec .
Simons Simplex Collection
A repository of genetic samples and phenotypic data from families where parents without ASD give birth to a child with the disorder. Supported by the Simons Foundation Autism Research Initiative (SFARI) .
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The Interagency Autism Coordinating Committee (IACC) was established by Congress under the Combating Autism Act of 2006 (CAA) to provide advice to the Secretary of Health and Human Services (HHS) and coordinate all efforts within HHS concerning autism spectrum disorders (ASD).
As mandated by law, the IACC has a membership composed of Federal officials from agencies involved in autism research and services and public members, including people with ASD, parents of children and adults with ASD, and members of the autism advocacy and research community. The diversity of the Committee ensures that a broad range of views and opinions is reflected and discussed in a public forum.
Under the CAA, the IACC is required to (1) develop and annually update a Strategic Plan for ASD research, (2) develop and annually update a summary of advances in ASD research, and (3) monitor federal activities related to ASD.
In developing and updating the IACC Strategic Plan for Autism Spectrum Disorder Research since it was first released in 2009, the IACC has laid out a framework for the pursuit of critical biomedical and services research. Through activities such as public meetings and workshops, publication of an annual Summary of Advances in ASD Research, dissemination of information regarding ASD research and IACC activities, gathering of public input and coordination of Federal activities related to autism, the IACC continues in its effort to provide guidance to the Department of Health and Human Services and to reach out to the broader autism community to find ways to work together to help people with autism and their families.
James F. Battey, M.D., Ph.D.
National Institute on Deafness and Other Communication Disorders
National Institutes of Health
Linda Birnbaum, Ph.D.
National Institute of Environmental Health Sciences
National Institutes of Health
Research Triangle Park, North Carolina
Ellen W. Blackwell, M.S.W.
Division of Community and Institutional Services
Disabled and Elderly Health Programs Group
Center for Medicaid and State Operations
Centers for Medicare & Medicaid Services
Coleen Boyle, Ph.D.
National Center on Birth Defects and Developmental Disabilities
Centers for Disease Control and Prevention
Larke N. Huang, Ph.D.
Senior Advisor on Children
Office of the Administrator
Substance Abuse and Mental Health Services Administration
Walter J. Koroshetz, M.D.
National Institute of Neurological Disorder and Stroke
National Institutes of Health
Office on Disability
U.S. Department of Health and Human Services
Francis S. Collins, M.D., Ph.D.
National Institutes of Health
Alan E. Guttmacher, M.D.
Eunice Kennedy Shriver National Institute of Child Health and Human Development
National Institutes of Health
Gail R. Houle, Ph.D.
Associate Division Director
Early Childhood Programs
Office of Special Education Programs
U.S. Department of Education
Geraldine Dawson, Ph.D.
Chief Science Officer
New York, New York
Gerald D. Fischbach, M.D.
Simons Foundation Autism Research Initiative
New York, New York
President and CEO
Autism Society of America
Yvette M. Janvier, M.D.
Children's Specialized Hospital
Toms River, New Jersey
Christine M. McKee, J.D.
Autistic Self-Advocacy Network
Lyn Redwood, R.N., M.S.N.
Co-Founder and Executive Director
Coalition for Safe Minds
Denise D. Resnik
Board Member and Co-Founder
Southwest Autism Research and Resource Center
Stephen M. Shore, Ed.D.
Autism Spectrum Consulting and
Assistant Professor of Special Education
Alison Tepper Singer, M.B.A.
Autism Science Foundation
New York, New York
Marjorie Solomon, Ph.D., M.B.A.
Assistant Clinical Professor
University of California, Davis
School of Medicine and
All material appearing in this report is in the public domain and may be reproduced or copied. A suggested citation follows.
Interagency Autism Coordinating Committee (IACC). 2011 IACC Strategic Plan for Autism Spectrum Disorder Research. January 2011. Retrieved from the U.S. Department of Health and Human Services Interagency Autism Coordinating Committee website: http://iacc.hhs.gov/strategic-plan/2011/index.shtml.