title: Serotonin-related pathways and developmental plasticity: relevance for psychiatric disorders.
abstract: Risk for adult psychiatric disorders is partially determined by early-life alterations occurring during neural circuit formation and maturation. In this perspective, recent data show that the serotonin system regulates key cellular processes involved in the construction of cortical circuits. Translational data for rodents indicate that early-life serotonin dysregulation leads to a wide range of behavioral alterations, ranging from stress-related phenotypes to social deficits. Studies in humans have revealed that serotonin-related genetic variants interact with early-life stress to regulate stress-induced cortisol responsiveness and activate the neural circuits involved in mood and anxiety disorders. Emerging data demonstrate that early-life adversity induces epigenetic modifications in serotonin-related genes. Finally, recent findings reveal that selective serotonin reuptake inhibitors can reinstate juvenile-like forms of neural plasticity, thus allowing the erasure of long-lasting fear memories. These approaches are providing new insights on the biological mechanisms and clinical application of antidepressants.
authors.affiliation: Departments of Mental Health and Psychiatry and Basic Neurosciences, University of Geneva Medical School, Geneva, Switzerland.
authors.forename: Alexandre
authors.initials: A
authors.lastname: Dayer
mesh_terms: D000818:Animals; D001921:Brain / Q000254:growth & development*; D059647:Gene-Environment Interaction; D014644:Genetic Variation; D006801:Humans; D001523:Mental Disorders / Q000235:genetics / Q000378:metabolism / Q000503:physiopathology; D055495:Neurogenesis / Q000502:physiology; D009473:Neuronal Plasticity / Q000502:physiology*; D012701:Serotonin / Q000235:genetics; D013315:Stress, Psychological / Q000150:complications*
chemical_list: D012701:Serotonin
keywords: antidepressant; cortex; development; mood disorder; serotonin; stress
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