Lack of association between translin-associated factor X gene (TSNAX) and methamphetamine dependence in the Japanese population.

Abstract

OBJECTIVES:

Recently, we detected that the prokineticin 2 receptor gene was associated with not only major depressive disorder (MDD) but also methamphetamine dependence. Therefore, it is possible that mood disorders and drug addiction have shared susceptibility genes. The translin-associated factor X gene (TSNAX)/disrupted-in-schizophrenia-1 gene (DISC1) has been associated with psychiatric disorders, including schizophrenia, MDD and bipolar disorder. TSNAX is located immediately upstream of DISC1 and has been shown to undergo intergenic splicing with DISC1. Based on this evidence, we hypothesized that TSNAX might be a good candidate gene for methamphetamine dependence.

METHODS:

We conducted a case-control study of Japanese individuals (215 with methamphetamine dependence and 318 age- and sex-matched controls) with three tagging SNPs (rs1630250, rs766288 and rs6662926) selected by HapMap database.

RESULTS:

rs1630250 was associated in males with methamphetamine dependence in the allele analysis (P-value: 0.0253). However, these results did not remain significant after Bonferroni correction to adjust for multiple comparisons (corrected P-value: 0.152).

CONCLUSION:

Our findings suggest that TSNAX does not play a role in methamphetamine dependence in the Japanese population. A replication study using larger samples needs to be conducted to obtain conclusive results.

• Authors: Taro Kishi, Tomo Okochi, Tsuyoshi Kitajima, Hiroshi Ujike, Toshiya Inada, Mitsuhiko Yamada, Naohisa Uchimura, Ichiro Sora, Masaomi Iyo, Norio Ozaki, Christoph U Correll, Nakao Iwata
• Journal: Progress in neuro-psychopharmacology & biological psychiatry (Prog Neuropsychopharmacol Biol Psychiatry) Vol. 35 Issue 7 Pg. 1618-22 (Aug 15 2011) ISSN: 1878-4216 [Electronic] England
• PMID: 21683752 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2011 Elsevier Inc. All rights reserved.

Chemical References

• Central Nervous System Stimulants
• DISC1 protein, human
• DNA-Binding Proteins
• Nerve Tissue Proteins
• TSNAX protein, human
• Methamphetamine

Topics

• Alleles
• Amphetamine-Related Disorders (epidemiology, genetics, metabolism)
• Asian People (genetics)
• Bipolar Disorder (genetics)
• Case-Control Studies
• Central Nervous System Stimulants (adverse effects, metabolism)
• DNA-Binding Proteins (genetics, metabolism)
• Depressive Disorder, Major (epidemiology, genetics, metabolism)
• Female
• Genetic Predisposition to Disease
• Genotype
• HapMap Project
• Haplotypes
• Humans
• Male
• Methamphetamine (adverse effects, metabolism)
• Nerve Tissue Proteins (genetics, metabolism)
• Polymorphism, Single Nucleotide
• Schizophrenia (genetics)