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Personality traits as intermediary phenotypes in suicidal behavior: Genetic issues

Patrick Baud · American Journal of Medical Genetics Part C: Seminars in Medical Genetics · 2005

AbstractA genetic contribution to the risk of suicidal behavior is now supported by many studies. It probably involves specific factors acting on their own, independently of the genetic transmission of associated psychiatric disorders. A history of childhood maltreatment, adverse events, psychosocial stress, psychological traits and major psychiatric disorders all appear to contribute to the global risk of suicide attempt or completion. The interplay between previously identified risk factors, different as they are in nature and degree of complexity, still remains to be clarified. A stress‐diathesis model has been proposed, where trait‐like genetic and developmental risk factors (the diathesis) interact through still unknown mechanisms with actual (stress‐related) factors to create the conditions for a suicidal gesture. Disentangling the effects of these risk factors, and specifically the effects of the genetic factors influencing these different pathological conditions, appears to be a difficult task. Indeed the results of candidate gene association studies suggest that genetic vulnerability factors for various related psychiatric phenotypes (major psychiatric disorders and person

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