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  • Title: NRAMP1 D543N and INT4 polymorphisms in susceptibility to pulmonary tuberculosis: A meta-analysis.
    Author: Yuan L, Ke Z, Guo Y, Xi X, Luo Z.
    Journal: Infect Genet Evol; 2017 Oct; 54():91-97. PubMed ID: 28648687.
    Abstract:
    The association of natural resistance associated macrophage protein 1 (NRAMP1) polymorphisms (D543N, INT4) with pulmonary tuberculosis (PTB) risk have been widely reported. However, the findings of previous studies were inconsistent. To clarify the role of these polymorphisms in PTB, we performed a meta-analysis of all available and relevant published studies. Based on comprehensive searches of the PubMed, Medline, Embase, Web of Science, Elsevier Science Direct and Cochrane Library database, we identified outcome data from all articles estimating the association between NRAMP1 polymorphisms and PTB risk. For D543NA/G polymorphism, no associations were found in all genetic models. For INT4C/G polymorphism, significant increased PTB risk was observed in recessive model (CC vs. GC+GG: P=0.025, OR=1.35, 95% CI=1.04-1.75). In the subgroup analysis by ethnicity, significantly increased risk were observed for D543NA/G polymorphism in Americans (GA vs. GG: P=0.03, OR=1.31, 95% CI=1.03-1.67; AA+AG vs. GG: P=0.032, OR=1.29, 95% CI=1.02-1.63). Moreover, the INT4C/G polymorphism was also associated with increased risk of TB for Africans in allele model (A vs. G: P=0.012, OR=1.41, 95% CI=1.08-1.85), heterozygous model (GA vs. GG: P=0.004, OR=1.53, 95% CI=1.14-2.04) and dominant model (AA+AG vs. GG: P=0.007, OR=1.49, 95% CI=1.12-1.98). This meta-analysis provides evidences that INT4C/G was associated with increased susceptibility to pulmonary tuberculosis in overall population in recessive model. D543NA/G polymorphism was associated with PTB increased risk in Americans, while INT4C/G polymorphism in Africans. Further well-designed, large scale studies are required to confirm this conclusion.
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