Trauma-induced changes in the brain differ significantly between males and females
Exposure to stress during critical developmental windows significantly increases the risk of developing mood and anxiety disorders in adulthood. While women and sexual- and gender-minority groups experience higher rates of adversity and stress-related disorders, the underlying biological mechanisms driving these sex-influenced vulnerabilities remain poorly understood.
Developmental stress triggers distinct brain alterations in males and females, according to a recent study. Researchers from the Max Planck Institute of Psychiatry and international collaborators uncovered how early-life adversity reshapes adult brain function and behavior through different biological pathways in the two sexes. Mice exposed to stress during pregnancy and early life exhibited sex-specific behavioral, neural, and molecular changes.
Males displayed reduced behavioral flexibility, depression-like traits, increased stress circuit activity, and elevated metabolic gene expression. Conversely, females retained flexibility, exhibited altered reward sensitivity, lower activation, and stronger network connectivity. These sex-opposite effects were also found in human depression tissue, highlighting the need for sex-informed approaches in psychiatric treatments.
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