Mariano Soiza-Reilly, Ph.D., of INSERM, France, will study the development and maturation of neural pathways connecting the medial prefrontal cortex (mPFC and the dorsal raphe nucleus, which are involved in stress and emotional responses and are impaired in mood disorders. Does dysregulation of this process contribute to vulnerability to stress and mood disorders? The team will use a new technique called array tomography along with in utero electroporation to selectively visualize and manipulate the activity of neural circuits. This may provide new insights into the possible role of mPFC neurons in the developmental origins of stress-related and mood disorders and will provide a plausible neural substrate for developing preventive tools and therapeutics.