Soumitra Sudip Bhuyan

University of Nebraska at Omaha, Omaha, Nebraska, United States

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Publications (2)3.06 Total impact

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    ABSTRACT: Several recent studies have focused on the association between the promoter polymorphisms 786T/C of the endothelial nitric oxide synthase (eNOS) gene and susceptibility to atrial fibrillation (AF); however, results have been conflicting. We searched Medline, Embase, and the ISI Web of Science through July 1, 2011. Five studies with 1,130 AF cases and 2,340 controls were selected. Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated based on fixed- and random-effects models. There was no overall association between eNOS 786T/C and AF risk. In subgroup analysis, stratified by ethnicity, we observed a positive association between the eNOS 786T/C polymorphism and AF risk among Caucasians but not among mixed populations. When stratifying by control source, the overall ORs for population- and hospital-based studies were 1.07 (95% CI, 0.50-2.30) and 0.79 (95% CI, 0.65-0.97) for CC vs. 22T carriers, respectively. In the studies with a sample size greater than 200, the eNOS 786T/C polymorphism decreased AF risk (OR [95% CI]: 0.79 [0.64-0.97] for CC vs. T carriers). This meta-analysis suggests that the 786T/C polymorphism of the eNOS gene is protective against AF risk among Caucasians. Additional large studies based on diverse populations are required to validate this conclusion.
    Journal of Cardiovascular Translational Research 06/2012; 5(4):528-34. · 3.06 Impact Factor
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    ABSTRACT: The tumor necrosis factor-alpha (TNF-α) gene may play an important role in coronary heart disease (CHD) and myocardial infarction (MI) risk. Recently, controversial results regarding the association of the G-308 A (rs1800629)polymorphism of the TNF-α gene with CHD/MI have been reported. We herein examine a possible association between the G-308 A (rs1800629)polymorphism of the TNF-α gene and CHD/MI in a sample of the Chinese Han population. We determined the genotypes of TNF-α G-308 A (rs1800629) in 535 unrelated Chinese patients with CHD, 420 patients with MI, and 1020 coronary artery disease-free controls. Additionally, a meta-analysis of all previous studies on the TNF-α G-308 A polymorphism and the risk of CHD and MI was performed. AA genotypes in the G-308 A (rs1800629)polymorphism of the TNF-α gene did not occur more frequently in CHD/MI patients than in controls; odds ratios (95% confidence intervals) were 1.743 (0.325 to 1.423) for CHD and 1.731 (0.442 to 1.526) for MI, after adjusting for conventional risk factors. Further stratification for age, gender, and other cardiovascular risk factors did not alter the prior negative findings. Pooled meta-analysis of 23 studies also found no statistically significant associations between the TNF-α polymorphism and CHD/MI risk in the genetic additive, dominant, and recessive models. Subgroup analyses showed no association between the TNF-α polymorphism and CHD/MI in Asian and Caucasian populations. Our study showed no association between the G-308 A (rs1800629) polymorphism of the TNF-α gene (presence of A allele) and CHD/MI in the Chinese Han population. There was no evidence of a difference in risk effects of rs1800629 between Caucasians and Asians.
    Journal of cardiovascular disease research 04/2012; 3(2):84-90.