A genome-wide association study of suicidal behavior.

TitleA genome-wide association study of suicidal behavior.
Publication TypeJournal Article
Year of Publication2015
AuthorsGalfalvy H, Haghighi F, Hodgkinson C, Goldman D, Oquendo MA, Burke A, Huang Y-Y, Giegling I, Rujescu D, Bureau A, Turecki G, J Mann J
JournalAm J Med Genet B Neuropsychiatr Genet
Volume168
Issue7
Pagination557-63
Date Published2015 Oct
ISSN1552-485X
KeywordsCase-Control Studies, Depressive Disorder, Major, European Continental Ancestry Group, Female, Genetic Markers, Genetic Testing, Genome-Wide Association Study, Humans, Male, Mental Disorders, Polymorphism, Single Nucleotide, Risk Factors, Suicidal Ideation, Suicide, Suicide, Attempted
Abstract

Genome wide array studies have reported limited success in identifying genetic markers conferring risk for suicidal behavior (SB). This may be attributable to study designs with primary outcome other than SB. We performed a GWAS on suicides and cases with a history of nonfatal suicide attempts compared with psychiatric controls and healthy volunteers. A consortium of USA, Canadian and German teams assembled two groups of cases (suicide attempters and suicides, N = 577) and non-attempter psychiatric and healthy controls (N = 1,233). Logistic regression was used to test genotype-suicidal behavior association. The test was repeated separating suicide attempt and completed suicide as outcomes. No SNP reached genome-wide significance, but several SNPs within STK3, ADAMTS14, PSME2, and TBX20 genes reached P < 1 × 10(-5) . The top SNPs for the suicide attempt analysis included two from DPP10, one from CTNNA3 and one from STK32B. In the suicide analysis we found seven SNPs from the TBX20 gene in the top hits. Pathway analysis identified the following pathways: "Cellular Assembly and Organization," "Nervous System Development and Function," "Cell Death and Survival," "Immunological Disease," "Infectious Disease," and "Inflammatory Response." The top genes in the SB analysis did not overlap with those in the ideation analysis. No genome wide significant results suggest that susceptibility to SB has genetic risk factors with smaller effect sizes. The strongest candidate genes, ADAMTS14, and PSME2 (both linked to inflammatory response), STK3 (neuronal cell death), and TBX20 (brainstem motor neuron development), have not been previously reported in association with suicide and warrant further study.

DOI10.1002/ajmg.b.32330
Alternate JournalAm. J. Med. Genet. B Neuropsychiatr. Genet.
PubMed ID26079190
Grant ListMH082041 / MH / NIMH NIH HHS / United States

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