title: C677T methylenetetrahydrofolate reductase gene polymorphisms in bipolar disorder: an association study in the Chinese population and a meta-analysis of genetic association studies.
abstract: The methylenetetrahydrofolate reductase (MTHFR) gene variant C677T is suspected to be a risk factor for psychiatric disorders, but it remains uncertain whether the MTHFR C677T variant is associated with bipolar disorders. To investigate possible association, unrelated controls (n=461) with no history of psychiatric disorders and patients (n=501) diagnosed with bipolar disorder were recruited in this study. In addition, six association studies published up to June 2008 were included in a subsequent meta-analysis. No significant difference was found in either allele frequencies or genotype distribution between patients and controls in our association study in the Chinese population. Similarly, the meta-analysis result showed no significant association between MTHFR C677T and bipolar disorder. In conclusion, the MTHFR C677T variant is unlikely to play a major role in the susceptibility to bipolar disorder, although MTHFR plays an important role in the one-carbon metabolism and DNA methylation.
authors.affiliation: Institute for Nutritional Science, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 294 Tai Yuan Road, Shanghai 200031, China.
authors.forename: Zhuo
authors.initials: Z
authors.lastname: Chen
authors.forename: Yun
authors.initials: Y
authors.lastname: Liu
authors.forename: Di
authors.initials: D
authors.lastname: Zhang
authors.forename: Zhe
authors.initials: Z
authors.lastname: Liu
authors.forename: Peng
authors.initials: P
authors.lastname: Wang
authors.forename: Daizhan
authors.initials: D
authors.lastname: Zhou
authors.forename: Teng
authors.initials: T
authors.lastname: Zhao
authors.forename: Ting
authors.initials: T
authors.lastname: Wang
authors.forename: He
authors.initials: H
authors.lastname: Xu
authors.forename: Sheng
authors.initials: S
authors.lastname: Li
authors.forename: Guoyin
authors.initials: G
authors.lastname: Feng
authors.forename: Lin
authors.initials: L
authors.lastname: He
authors.forename: Lan
authors.initials: L
authors.lastname: Yu
mesh_terms: D000328:Adult; D044466:Asian People; D001714:Bipolar Disorder / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease / Q000235:genetics*; D005838:Genotype; D006801:Humans; D008297:Male; D015201:Meta-Analysis as Topic; D042965:Methylenetetrahydrofolate Reductase (NADPH2) / Q000235:genetics*; D011110:Polymorphism, Genetic / Q000235:genetics*; D055815:Young Adult
chemical_list: D042965:Methylenetetrahydrofolate Reductase (NADPH2)