Association of two polymorphisms of miRNA-146a rs2910164 (G > C) and miRNA-499 rs3746444 (T > C) with asthma: a meta-analysis

Abstract

Objective To conduct a meta-analysis to determine the association between two single nucleotide polymorphisms (SNPs) miRNA146a rs2910164 (G > C) and miRNA-499 rs3746444 (T > C) and asthma risk. Data Sources PubMed and Embase (updated May 17, 2019). Keywords (microRNA OR microRNAs) AND (polymorphism OR polymorphisms) AND (Asthmas OR Bronchial Asthma OR Asthma, Bronchial). Results Six eligible case-control studies (2441 asthma cases and 3044 controls) met our inclusion criteria. A trend of increased asthma risk was indicated by the heterozygote model (miR-499: TC versus TT, OR = 1.38, 95% CI = 1.06–1.79, P < 0.01) and the dominant model (miR-499: TC + CC versus TT, OR = 1.60, 95% CI = 1.07–2.39, P < 0.01) of miRNA-499 rs3746444. Polymorphisms rs2910164 in miRNA-146a of the allele model (miR-146a: C versus G, OR = 0.84, 95% CI = 0.74–0.96, P = 0.238), homozygote model (miR-146a: CC versus GG, OR = 0.68, 95% CI = 0.51–0.91, P = 0.213), recessive model (miR-146a: CC versus GC + GG, OR = 0.75, 95% CI = 0.60–0.94, P = 0.149) indicated a decreased risk of asthma. Conclusions The miR-499 rs3746444 (T > C) polymorphism is associated with asthma susceptibility and miRNA-146a rs2910164 (G > C) polymorphism has a protective role against susceptibility to asthma.