Serotonergic Multilocus Genetic Variation Moderates the Association Between Major Interpersonal Stress and Adolescent Depression: Replication and Candidate Environment Specification

UNCG Author/Contributor (non-UNCG co-authors, if there are any, appear on document)
Suzanne Vrshek-Schallhorn, Associate Professor and Undergraduate Program Director (Creator)
The University of North Carolina at Greensboro (UNCG )
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Abstract: Serotonin-linked genetic risk and stressful life event (SLE) interaction research has been criticized for using single genetic variants with inconsistent replicability. A recent study showed that a multilocus genetic profile score (MGPS) capturing additive risk from five serotonin-linked polymorphisms moderated the association between major interpersonal SLEs and depression, but no subsequent replication attempts have been reported. Moreover, major interpersonal SLEs have been suggested as “candidate environments” for this MGPS, but it has never been demonstrated that gene-environment interactions (G × Es) for major interpersonal SLEs are significantly stronger than for other contexts. Adolescents (N = 241) completed contextual-threat life stress interviews and clinical interviews assessing depressive symptoms, and provided DNA. MGPS intensified the major interpersonal stress-depression association; the interaction accounted for 4% of depressive symptom variance. Genetic moderation was statistically unique to major interpersonal stress versus other environments. Extending previous findings, results support an MGPS approach and underscore the cruciality of the G × E candidate environment.

Additional Information

Journal of Psychiatry Research, 117
Language: English
Date: 2019
multilocus genetic profile score, serotonin, gene-environment interaction, depression, interpersonal stress

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