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Detailed Analysis of Gene Polymorphisms Associated with Ischemic Stroke in South Asians

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Listed:
  • Sunaina Yadav
  • Nazeeha Hasan
  • Thomas Marjot
  • Muhammad S Khan
  • Kameshwar Prasad
  • Paul Bentley
  • Pankaj Sharma

Abstract

The burden of stroke is disproportionately high in the South Asian subcontinent with South Asian ethnicity conferring a greater risk of ischemic stroke than European ancestry regardless of country inhabited. While genes associated with stroke in European populations have been investigated, they remain largely unknown in South Asians. We conducted a comprehensive meta-analysis of known genetic polymorphisms associated with South Asian ischemic stroke, and compared effect size of the MTHFR C677T-stroke association with effect sizes predicted from homocysteine-stroke association. Electronic databases were searched up to August 2012 for published case control studies investigating genetic polymorphisms associated with ischemic stroke in South Asians. Pooled odds ratios (OR) for each gene-disease association were calculated using a random-effects model. We identified 26 studies (approximately 2529 stroke cases and 2881 controls) interrogating 33 independent genetic polymorphisms in 22 genes. Ten studies described MTHFR C677T (108 with TT genotype and 2018 with CC genotype) -homocysteine relationship and six studies (735 stroke cases and 713 controls) described homocysteine-ischemic stroke relationship. Risk association ORs were calculated for ACE I/D (OR 5.00; 95% CI, 1.17–21.37; p = 0.03), PDE4D SNP 83 (OR 2.20; 95% CI 1.21–3.99; p = 0.01), PDE4D SNP 32 (OR 1.57; 95% CI 1.01–2.45, p = 0.045) and IL10 G1082A (OR 1.44; 95% CI, 1.09–1.91, p = 0.01). Significant association was observed between elevated plasma homocysteine levels and MTHFR/677 TT genotypes in healthy South Asians (Mean difference (ΔX) 5.18 µmol/L; 95% CI 2.03–8.34: p = 0.001). Our results demonstrate that the genetic etiology of ischemic stroke in South Asians is broadly similar to the risk conferred in Europeans, although the dataset is considerably smaller and warrants the same clinical considerations for risk profiling.

Suggested Citation

  • Sunaina Yadav & Nazeeha Hasan & Thomas Marjot & Muhammad S Khan & Kameshwar Prasad & Paul Bentley & Pankaj Sharma, 2013. "Detailed Analysis of Gene Polymorphisms Associated with Ischemic Stroke in South Asians," PLOS ONE, Public Library of Science, vol. 8(3), pages 1-8, March.
    • Handle: RePEc:plo:pone00:0057305
    DOI: 10.1371/journal.pone.0057305
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    1. Editors The, 2008. "From the Editors," Basic Income Studies, De Gruyter, vol. 3(1), pages 1-1, July.
    2. Paul Bentley & George Peck & Liam Smeeth & John Whittaker & Pankaj Sharma, 2010. "Causal Relationship of Susceptibility Genes to Ischemic Stroke: Comparison to Ischemic Heart Disease and Biochemical Determinants," PLOS ONE, Public Library of Science, vol. 5(2), pages 1-15, February.
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    1. Zhao-Feng Chen & Lufei Young & Chong Ho Yu & S. Pamela K. Shiao, 2018. "A Meta-Prediction of Methylenetetrahydrofolate-Reductase Polymorphisms and Air Pollution Increased the Risk of Ischemic Heart Diseases Worldwide," IJERPH, MDPI, vol. 15(7), pages 1-16, July.
    2. Jun Jin & Wuying Li & Lingmei Peng & Jian Chen & Rong Li & Peihua Wu & Sheng Tan, 2014. "Relationship between Interleukin-10 −1082A/G Polymorphism and Risk of Ischemic Stroke: A Meta-Analysis," PLOS ONE, Public Library of Science, vol. 9(4), pages 1-10, April.
    3. Vandana Rai & Upendra Yadav & Pradeep Kumar & Sushil Kumar Yadav & Om Prakesh Mishra, 2014. "Maternal Methylenetetrahydrofolate Reductase C677T Polymorphism and Down Syndrome Risk: A Meta-Analysis from 34 Studies," PLOS ONE, Public Library of Science, vol. 9(9), pages 1-15, September.

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