Aim: Accumulating evidence suggests that inflammatory processes play a role in asthma etiology, and interleukin-10 (IL10) is an important immunosuppressive cytokine. The present study aimed to evaluate the contribution of IL10 promoter A-1082G (rs1800896), T-819C (rs3021097), A-592C (rs1800872) genetic polymorphisms to the risk of asthma in Taiwan.
Materials and methods: Associations of three IL10 polymorphic genotypes with risk of asthma were investigated among 198 patients with asthma and 453 non-asthmatic healthy controls, by polymerase chain reaction-restriction fragment length polymorphism genotyping method.
Results: The results showed that the percentages of TT, TC and CC for IL-10 T-819C genotypes were differentially represented at 63.1%, 32.3% and 4.6%, respectively, in the patient group and 53.0%, 36.4% and 10.6%, respectively, in the healthy control group (p for trend=0.0114). The CC genotype carriers were at lower risk for asthma (odds ratio=0.36, 95% confidence interval=0.17-0.76, p=0.0055). There was no difference in the distribution of A-1082G or A-592C genotype between the asthma and non-asthma groups. The protective effects of the CC genotype were obvious among males, but not females, and those aged 25 up to 40 years but not those aged over 40 years.
Conclusion: The CC genotype of IL10 T-819C compared to the TT genotype may have a protective effect on asthma risk in younger adults (25-40 years old), and males in Taiwan.
Keywords: Age; Taiwan; asthma; gender; genotype; interleukin-10; polymorphism.
Copyright © 2015 International Institute of Anticancer Research (Dr. John G. Delinassios), All rights reserved.