Association of substance dependence phenotypes in the COGA sample

作者：Wetherill Leah; Agrawal Arpana; Kapoor Manav; Bertelsen Sarah; Bierut Laura J; Brooks Andrew; Dick Danielle; Hesselbrock Michie; Hesselbrock Victor; Koller Daniel L; Nhung Le; Nurnberger John I Jr; Salvatore Jessica E; Schuckit Marc; Tischfield Jay A; Wang Jen Chyong; Xuei Xiaoling; Edenberg Howard J; Porjesz Bernice; Bucholz Kathleen; Goate Alison M; Foroud Tatiana^*

来源：Addiction Biology, 2015, 20(3): 617-627.

DOI：10.1111/adb.12153

• Alcohol dependence
• cannabis dependence
• cocaine dependence
• common genetic liability
• drug dependence
• opioid dependence

Alcohol and drug use disorders are individually heritable (50%). Twin studies indicate that alcohol and substance use disorders share common genetic influences, and therefore may represent a more heritable form of addiction and thus be more powerful for genetic studies. This study utilized data from 2322 subjects from 118 European-American families in the Collaborative Study on the Genetics of Alcoholism sample to conduct genome-wide association analysis of a binary and a continuous index of general substance dependence liability. The binary phenotype (ANYDEP) was based on meeting lifetime criteria for any DSM-IV dependence on alcohol, cannabis, cocaine or opioids. The quantitative trait (QUANTDEP) was constructed from factor analysis based on endorsement across the seven DSM-IV criteria for each of the four substances. Heritability was estimated to be 54% for ANYDEP and 86% for QUANTDEP. One single-nucleotide polymorphism (SNP), rs2952621 in the uncharacterized gene LOC151121 on chromosome 2, was associated with ANYDEP (P=1.8x10(-8)), with support from surrounding imputed SNPs and replication in an independent sample [Study of Addiction: Genetics and Environment (SAGE); P=0.02]. One SNP, rs2567261 in ARHGAP28 (Rho GTPase-activating protein 28), was associated with QUANTDEP (P=3.8x10(-8)), and supported by imputed SNPs in the region, but did not replicate in an independent sample (SAGE; P=0.29). The results of this study provide evidence that there are common variants that contribute to the risk for a general liability to substance dependence.

• 出版日期2015-5