Abstract
Stroke is a heterogeneous multifactorial disease and is thought to have a polygenic basis. Case–control studies on gene sequence variations have identified a number of potential genetic predisposition factors, but due to the conflicting results, uncertainty remains on the effect of these polymorphisms on risk for the development of stroke. To qualitatively and quantitatively assess the risk associated with different gene polymorphisms for stroke in Asian populations, we comprehensively searched and identified all the studies of association. Clinically overt case–control studies were selected only if neuroimaging had been used as the confirmatory measure for diagnosis of stroke. We performed a meta-analysis of the three most investigated genes, viz., methylenetetrahydrofolate reductase (MTHFR), apolipoprotein E (ApoE) and angiotensin-converting enzyme (ACE). Statistically significant association with stroke were identified for C677T polymorphism of MTHFR [random effects odds ratio (OR) = 1.47, 95% confidence interval (95% CI) 1.19, 1.82; P = 0.0004] and marginally significant association was detected with allele ɛ 4 of ApoE (random effects OR = 1.47, 95% CI 1.00, 2.15; P = 0.049). The sensitivity analysis (exclusion of studies with controls not in Hardy–Weinberg equilibrium) revealed a significant association of stroke with the MTHFR C677T and ApoE ɛ 4 alleles but showed no association with ACE gene insertion/deletion polymorphism.
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This work was supported by a research grant from the Indian Institute of Technology, Kanpur (IITK), to S.G. I.B. and V.G. received studentships from the IITK.
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Banerjee, I., Gupta, V. & Ganesh, S. Association of gene polymorphism with genetic susceptibility to stroke in Asian populations: a meta-analysis. J Hum Genet 52, 205–219 (2007). https://doi.org/10.1007/s10038-006-0098-x
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DOI: https://doi.org/10.1007/s10038-006-0098-x
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