Abstract
The aim of this study was to explore whether the catechol-O-methyltransferase (COMT) Val158Met or the peroxisome proliferator-activated receptor-gamma (PPARγ) Pro12Ala polymorphisms are associated with susceptibility to Alzheimer’s disease (AD). We conducted a meta-analysis of the associations between the COMT Val158Met and the PPARγ Pro12Ala polymorphisms and AD in subjects. Meta-analysis showed no association between AD and the COMT G allele in any of the study subjects [odds ratio (OR) = 0.972, 95 % confidence intervals (95 % CI) = 0.893–1.059, p = 0.515]. Stratification by ethnicity indicated an association between the COMT GG+GA genotype and AD in an Asian group (OR = 0.702, 95 % CI = 0.517–0.953, p = 0.023), but not in Europeans (OR = 1.058, 95 % CI = 0.868–1.289, p = 0.579). Homozygote contrast analysis showed the same pattern for the COMT GG+GA genotype. Meta-analysis showed no association between AD and the PPARγ polymorphism (OR for the C allele = 0.963, 95 % CI = 0.818–1.134, p = 0.649). This meta-analysis identified an association between AD and the COMT Val158Met polymorphism in Asians but not in Europeans, but it revealed no association between AD and the PPARγ Pro12Ala polymorphism.
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Lee, Y.H., Song, G.G. COMT Val158Met and PPARγ Pro12Ala polymorphisms and susceptibility to Alzheimer’s disease: a meta-analysis. Neurol Sci 35, 643–651 (2014). https://doi.org/10.1007/s10072-014-1645-4
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DOI: https://doi.org/10.1007/s10072-014-1645-4