TPH2 Gene Polymorphisms and Major Depression - A Meta-Analysis
作者
Gao, J;Pan, ZL;Jiao, ZA;Li, F;Zhao, GQ;Wei, QQ;Pan, F;Evangelou, E
作者单位
[Gao, Jin; Pan, Fang] Shandong Univ, Sch Med, Dept Med Psychol, Jinan, Shandong, Peoples R China.;-;[Gao, Jin; Jiao, Zhian; Zhao, Guoqing; Wei, Qianqian] Shandong Univ, Prov Hosp, Dept Clin Psychol, Jinan, Shandong, Peoples R China.;-;[Pan, Zhenglun; Li, Feng] Shandong Univ, Prov Hosp, Dept Rheumatol, Jinan, Shandong, Peoples R China.;-;[Evangelou, Evangelos] Univ Ioannina, Sch Med, Dept Hyg & Epidemiol, GR-45110 Ioannina, Greece.
摘要
Background: Tryptophan hydroxylase-2 (TPH2) is the rate-limiting enzyme in the synthetic pathway for brain serotonin and is considered key factor for maintaining normal serotonin transmission in the central neuron system (CNS). Gene-disease association studies have reported a relationship between TPH2 and major depressive disorder (MDD) in different populations, however subsequent studies have produced contradictory results.;-;Objectives: We performed a systematic overview and a meta-analysis with all available data up-to-date.;-;Methods: We scrutinized PubMed, Embase, HuGNet and China National Knowledge Infrastructure (CNKI) and last update was held on October 2011. We also searched the manuscripts and the supplementary documents of the published genome-wide association studies in the field. Effect sizes of independent loci that have been studied in more than 3 articles were synthesized using fixed and random effects models.;-;Results: We found 27 eligible articles that studied a total of 74 single nucleotide polymorphisms (SNPs). Finally, 12 independent loci were included in the meta-analysis. The synthesis of the data shown that two SNPs (rs4570625 and rs17110747) were associated with MDD using fixed effects models. SNP rs4570625 had low heterogeneity and remained significant using the more conservative random effects calculations with a summary OR = 0.83 (95% CI: 0.73-0.96).;-;Conclusion: The current study identified a SNP (rs4570625) with strong epidemiological credibility; however more studies are required to provide robust evidence for other weak associations.
关键词
TRYPTOPHAN HYDROXYLASE-2 GENE; OF-FUNCTION MUTATION; HAPLOTYPE ANALYSIS; CANDIDATE GENES; MOOD DISORDERS; NO ASSOCIATION; UNIPOLAR; POPULATION; EPIDEMIOLOGY; RELATIVES
基本信息
