title: The association between COMT Val158Met polymorphism and migraine risk: A meta-analysis.
abstract: Background The COMT Val158Met polymorphism has long been regarded as a risk factor for migraine. The possible association between COMT Val158Met polymorphism and migraine has been evaluated in several studies, but the results are not consistent. Therefore, we conduct this meta-analysis to address these issues. Methods The WEB OF SCIENCE and EMBASE databases were searched for eligible studies. The odds ratio (OR) with the corresponding 95% confidence interval (CI) was calculated to estimate the strength of the association between COMT Val158Met polymorphism and migraine. Results Five studies with 979 cases and 1870 controls were ultimately included in the present meta-analysis. The overall data showed no significant association between COMT Val158Met polymorphism and migraine in the multiplicative model (OR = 0.97, 95% CI: 0.78-1.21, p = 0.805) and dominant model (OR = 1.05, 95% CI: 0.75-1.48, p = 0.773), neither in the additive model (OR = 0.97, 95% CI: 0.77-1.23, p = 0.817) nor in the recessive model (OR = 0.88, 95% CI: 0.71-1.09, p = 0.246). In subgroup analysis, both for Caucasian and Asian populations, no statistically significant associations were observed in any genetic models. Conclusions Our meta-analysis suggested that the COMT Val158Met polymorphism was not associated with migraine risk.
authors.affiliation: 1 Department of Anesthesiology, The Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong Province, China.
authors.forename: Yao-Jun
authors.initials: YJ
authors.lastname: Liao
authors.affiliation: 2 Department of Neurology, Sun Yat-Sen Memory Hospital of Sun Yat-Sen University, Guangzhou, Guangdong Province, China.
authors.forename: Jing-Ru
authors.initials: JR
authors.lastname: Jiang
authors.affiliation: 1 Department of Anesthesiology, The Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong Province, China.
authors.forename: San-Qing
authors.initials: SQ
authors.lastname: Jin
mesh_terms: D002394:Catechol O-Methyltransferase / Q000235:genetics*; D056726:Genetic Association Studies / Q000379:methods; D020022:Genetic Predisposition to Disease / Q000453:epidemiology / Q000235:genetics; D006801:Humans; D008715:Methionine / Q000235:genetics*; D008881:Migraine Disorders / Q000175:diagnosis / Q000453:epidemiology / Q000235:genetics*; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*; D012307:Risk Factors; D014633:Valine / Q000235:genetics*
chemical_list: D008715:Methionine; C588010:COMT protein, human; D002394:Catechol O-Methyltransferase; D014633:Valine
keywords: COMT; Val158Met polymorphism; migraine; rs4680