期刊
NEUROPSYCHOPHARMACOLOGY
卷 32, 期 11, 页码 2375-2383出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/sj.npp.1301359
关键词
violence; aggression; criminality; personality; monoamine metabolism; serotonin transporter
Aggressive behavior is influenced by variation in genes of the serotonergic circuitry and early-life experience alike. The present study aimed at investigating the contribution of polymorphisms shown to moderate transcription of two genes involved in serotonergic neurotransmission ( serotonin transporter, 5HTT, and monoamine oxidase A, MAOA) to the development of violence and to test for gene-environment interactions relating to adverse childhood environment. A cohort of 184 adult male volunteers referred for forensic assessment participated in the study. Each individual was assigned to either a violent or a nonviolent group. Logistic regression was performed and the best-fitting model, with a predictive power of 74%, revealed independent effects of adverse childhood environment and MAOA genotype. High environmental adversity during childhood was associated significantly with violent behavior. Forty-five percent of violent, but only 30% of nonviolent individuals carried the low-activity, short MAOA allele. Most interestingly, an interaction effect between childhood environment and 5HTT genotype on violent behavior was found in that high adversity during childhood impacted only the later-life violence if the short promoter alleles were present. These findings indicate complex interactions between genetic variation of the serotonergic circuitry and environmental factors arguing against simplistic, mono-causal explanations of violent behavior.
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