Meta-Analysis on the Associations of TLR2 Gene Polymorphisms with Pulmonary Tuberculosis Susceptibility among Asian Populations
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Meta-Analysis on the Associations of TLR2 Gene Polymorphisms with Pulmonary Tuberculosis Susceptibility among Asian Populations

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  • Alternative Title:
    PLoS One
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  • Description:
    Background

    Publications regarding the associations of toll-like receptor 2 (TLR2) G2258A and T597C polymorphisms with pulmonary tuberculosis (PTB) susceptibility are inconsistent. A meta-analysis was conducted to investigate the relationship between TLR2 G2258A and T597C polymorphisms with PTB susceptibility.

    Methods

    A systematic search was performed for published studies on the relationship between TLR2 polymorphisms and PTB susceptibility. Information was gathered from each eligible study, and statistically analyzed.

    Results

    6 eligible studies, totaling 1301 cases and 1217 controls on G2258A genotypes, and 8 studies, totaling 2175 cases and 2069 controls on T597C genotypes, were included in the analysis. TLR2 2258G allele and 2258GG genotype were found to be associated with decreased PTB susceptibility (A vs. G: OR  = 3.02, 95% CI: 2.22–4.12, P<0.001, GA+AA vs. GG: OR  = 2.69, 95% CI = 1.49–4.87, P = 0.001). In the subgroup analyses, the 2258G allele and 2258GG genotype also exhibited a protective effect of PTB risk in Asians (A vs. G: OR  = 2.95, 95% CI: 1.91–4.55, P<0.001; GA+AA vs. GG: OR  = 3.59, 95% CI: 2.23–5.78, P<0.001), while no associations were observed in Caucasians. No significant associations between T597C polymorphism and PTB were found in the allele model (C vs. T: OR  = 0.95, 95% CI: 0.86–1.04, P = 0.28), co-dominant model (CC vs. TT: OR  = 0.88, 95% CI = 0.92–1.40, P = 0.25; CT vs. TT: OR  = 0.92, 95% CI = 0.80–1.06, P = 0.28), recessive model (CC vs. TT+TC: OR  = 0.96, 95% CI: 0.80–1.16, P = 0.69), or dominant model (TC+CC vs. TT: OR  = 0.93, 95% CI = 0.76–1.15, P = 0.51). The associations of T597C polymorphism with PTB susceptibility, in the ethnic-specific analyses, were still not significant.

    Conclusion

    TLR2 2258G allele may provide protective effects against PTB susceptibility, particularly among Asians, whereas TLR2 T597C polymorphism might not be associated with PTB susceptibility.

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  • Source:
    PLoS One. 2013; 8(10).
  • Document Type:
    Journal Article
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