Stress sensitization to depression following childhood adversity: Moderation by HPA axis and serotonergic multilocus profile scores.

Development and Psychopathology
Lisa R StarrSuzanne Vrshek-Schallhorn

Abstract

Childhood adversity appears to sensitize youth to stress, increasing depression risk following stressful life events occurring throughout the lifespan. Some evidence suggests hypothalamic-pituitary-adrenal (HPA) axis-related and serotonergic genetic variation moderates this effect, in a "gene-by-environment-by-environment" interaction (G × E × E). However, prior research has tested single genetic variants, limiting power. The current study uses a multilocus genetic profile score (MGPS) approach to capture polygenic risk relevant to HPA axis and serotonergic functioning. Adolescents (N = 241, Mage = 15.90) completed contextual-threat-based interviews assessing childhood adversity and acute life events, and diagnostic interviews assessing depression. Established MGPSs indexed genetic variation linked to HPA axis (10 single nucleotide polymorphisms [SNPs]) and serotonergic (five SNPs) functioning. Results showed significant MGPS × Childhood Adversity × Recent Life Stress interactions predicting depression for both HPA axis and serotonergic MGPSs, with both risk scores predicting stronger Childhood Adversity × Recent Stress interactions. Serotonergic genetic risk specifically predicted sensitization to major interpersonal stressors...Continue Reading

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Jan 31, 2021·Nutrients·Tarkan KarakanRaffaele Capasso

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