Family-based study of brain-derived neurotrophic factor ( ΒDNF) gene polymorphism in alcohol dependence

Brain-derived neurotrophic factor (BDNF) belongs to a family of proteins related to the nerve growth factor family, which are responsible for the proliferation, survival and differentiation of neurons. BDNF is thought to be involved in the pathogenesis of bipolar disorder, schizophrenia, eating disorders and addiction. We hypothesize that a functionally relevant polymorphism of the ΒDNF gene promoter may be associated with the pathogenesis of alcohol dependence.We performed an association study of 141 families with alcohol dependence. One hundred and thirty-eight healthy control subjects were matched based on ethnicity and gender. An association between the ΒDNF Val66Met gene polymorphism and alcoholism was not found.