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Abstract
Objective: There has been significant interest in the association between asthma and the polymorphisms of IL-17A and IL-17F for a period of time. This work aims to present a clearer relationship between asthma and the polymorphisms of IL-17A and IL-17F. Method: Searches were performed in Medline, EMBASE, and the Chinese National Knowledge Infrastructure (CNKI) databases. Pooled odds ratios (ORs) and 95% confidence intervals (CIs) were calculated to assess the relationship between polymorphisms of IL-17A and IL-17F and asthma. Results: Nine studies comprising 3650 asthmatics and 3370 controls were included in this meta-analysis for all single nucleotide polymorphisms (SNPs) (2–6 per SNP). Our study examined the polymorphisms of IL-17F rs1889570 (C/T) (CC versus TT: OR = 0.55, 95%CI = 0.41–0.75; CT versus TT: OR = 0.54, 95%CI = 0.40–0.72; CC/CT versus TT: OR = 0.55, 95%CI = 0.42–0.72; CC versus CT/TT, OR = 1.83, 95%CI = 1.39–2.41), IL-17A rs4711998(A/G) (AA/AG versus GG: OR = 0.67, 95%CI = 0.46–0.98), and IL-17A rs3819024(A/G) (AA versus GG: OR = 1.77, 95%CI = 1.39–2.25) and found they were significantly related to the risk of asthma. Conclusion: Our systematic review showed that IL-17F rs1889570(C/T), IL-17A rs4711998(A/G) and IL-17A rs3819024(A/G) may be potential risk factors for asthma susceptibility.
Declaration of interest
The authors report that they have no conflicts of interest. The authors alone are responsible for the content and writing of the paper. This work was supported by a grant from the Natural Science Foundation of Ningbo (No. 2012A610257, Zaichun Deng).