Study of the BDNF-Val66Met Polymorphism in Alcohol-dependent Subjects in Relation to Abstinence After Withdrawal

Study of the BDNF- Val66Met Polymorphism in Alcohol-dependent Subjects in Relation to Abstinence After Withdrawal

This study is complementary to the main study "Brain Derived Neurotrophic Factor Serum Levels Evolution During the Six Months After Alcohol Withdrawal " NCT01491347.

The purpose of this study is to evaluate the Bdnf gene - Val66Met polymorphism in subjects with alcohol dependence according to their alcohol consumption status 6 months after withdrawal (relapse or abstinence), in relation to the presence of psychiatric co-morbidities.

Inclusion Criteria:

• participation to the study "BDNF serum levels evolution during 6 months after alcohol withdrawal" (main study)
• criteria from the main study

Exclusion Criteria:

• criteria from the main study
• released or out from the main study before the follow-up at 4 months after withdrawal