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Gene and environment interaction in familial suicidal behavior. A single family with 4 committed suicides

Habibolah Khazaie1, Leeba Rezaie, Reza Alibakhshi

  • 1Sleep Research Center, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran.

Saudi Medical Journal
|October 20, 2011
PubMed

Insights

Family suicide risk is high, influenced by genetics and environment. A case study highlights how gene variations and socioeconomic factors interact, increasing suicide risk in the M family.

Area of Science:

  • Psychiatry
  • Genetics
  • Sociology

Background:

  • Family history of suicide is a significant predictor of suicide risk.
  • Gene-environment interactions are crucial in understanding suicide etiology.

Observation:

  • A case study of the M family documented four suicides within five years, involving the father and three sons.
  • Suicidal ideation was prevalent among other family members.

Findings:

  • The M family's elevated suicide risk resulted from a combination of environmental factors (low education, opium dependency, unemployment, poverty, limited mental health access) and genetic factors.
  • Genotype analysis revealed all surviving members carried CC and AC variations in the tryptophan hydroxylase A218C polymorphism.

Implications:

  • This case underscores the complex interplay between genetic predisposition and environmental stressors in familial suicide.
  • Understanding these interactions is vital for targeted suicide prevention strategies and mental health interventions.

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