A meta-analysis on relationship of MAOB intron 13 polymorphisms, interactions with smoking/COMT H158L polymorphisms with the risk of PD

Abstract

Background: To date, many studies have examined the correlation between Monoamine oxidase B (MAOB) intron 13 A/G polymorphisms and the susceptibility to Parkinson's disease (PD). However, the results of these studies are inconclusive. Methods: In order to confirm this correlation, a meta-analysis of 15 studies was performed and the dichotomous data are presented as odds ratios (ORs) and 95% confidence intervals (CIs). Results: Carriers of the MAOB intron 13 A allele were more likely to have PD than carriers of the G allele in the Asian population (OR = 1.182, 95% CI = 1.012–1.380, p < 0.05). When combined with the COMT LL genotype, the MAOB intron 13 AA/(A) genotype increased the risk of PD susceptibility more than with the GA genotype or GG + GA/(G) genotype (AA/(A) vs. GG + GA/(G): OR = 1.610, 95% CI = 1.094–2.369; AA/(A) vs. GA: OR = 1.621, 95% CI = 1.004–2.619). Irrespective of whether individuals were in the AA/(A) genotype or GG + GA/(G) genotype subgroup, this meta-analysis indicated that smoking was a PD-preventive factor (AA/(A): OR = 1.823, 95% CI = 1.150–2.891; GG + GA/(G): OR = 2.245, 95% CI = 1.277–3.948). Conclusion: The results of this meta-analysis suggest that people with the MAOB intron 13 A allele have an increased risk of PD in the Asian population, especially when combined with the COMT LL genotype.

KEYWORDS:

• MAOB gene
• Parkinson's disease
• polymorphism
• meta-analysis

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Corrigendum

Declaration of Interest

No potential conflict of interest was reported by the authors.

This article was originally published with errors. This version has been corrected. Please see Corrigendum (http://dx.doi.org/10.3109/00207454.2015.1089038).