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  • Title: Interleukin-10 promoter 1082/-819/-592 polymorphisms are associated with asthma susceptibility in Asians and atopic asthma: a meta-analysis.
    Author: Zheng XY, Guan WJ, Mao C, Chen HF, Ding H, Zheng JP, Hu TT, Luo MH, Huang YH, Chen Q.
    Journal: Lung; 2014 Feb; 192(1):65-73. PubMed ID: 24162871.
    Abstract:
    BACKGROUND: Although interleukin-10 (IL-10) is a potent inhibitor of allergic diseases, the association between promoter -1082/-819/-592 polymorphisms and asthma susceptibility remains inconclusive. We sought to determine if IL-10 promoter -1082/-819/-592 polymorphisms contribute to asthma susceptibility and are associated with phenotypes of atopic asthma. METHODS: Systematic computerized searches were performed. Pooled odds ratios (ORs) and 95 % confidence intervals (CIs) were estimated by using random-effect and fixed-effect models, based on between-study heterogeneity. Subgroup analyses were performed according to age, ethnicity, and atopy. Publication bias was detected by funnel plot using Egger's test. RESULTS: A total of 4,716 asthmatic patients and 5,093 controls were included. The asthma susceptibility correlated significantly with IL-10 promoter gene -1082 polymorphism [OR (95 % CI) 1.26 (1.02, 1.55) for AA vs. AG + GG] and -592 polymorphism [OR (95 % CI) 1.12 (1.07, 1.34) for AC + AA vs. CC] (both P < 0.05), but not with -819 polymorphism (P > 0.05). Subgroup analyzes suggested that the AA versus AG + GG genotype of -1082A/G polymorphism and AC + AA versus CC genotype of -592A/C polymorphism contributed significantly to increased asthma susceptibility in adults [OR (95 % CI) 1.39 (1.03, 1.87) for -1082A/G and 1.53 (1.25, 1.87) for -592A/C polymorphism]. The Asian population [OR (95 % CI) 1.35 (1.1, 1.7) for -1082A/G and 1.4 (1.12, 1.64) for -592A/C polymorphism] and subjects with atopic asthma [OR (95 % CI) 1.49 (1.18, 1.88) for -1082A/G and 1.23 (1.01, 1.48) for -592A/C polymorphism] also had an increased susceptibility of asthma. No publication bias was detected. CONCLUSIONS: IL-10 promoter -1028A/G, -592A/C polymorphisms and their haplotypes, but not -819T/C polymorphism, correlate with asthma susceptibility.
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