Association study between asthma and single nucleotide polymorphisms of ORMDL3, GSDMB, and IL1RL1 genes in an Algerian population

Background Genetic variation has a key role in the development of asthma, but genetic influences may vary between different populations. In this study, we looked for evidence of association of key asthma SNPs, namely, rs1420101 and rs10192157 within the IL1RL1 gene, rs2305480 in GSDMB gene, and the rs3744246 polymorphism in the ORMDL3 gene, in the Algerian population. We included 266 unrelated subjects of an Algerian population in a case-control study, with 125 adult asthmatic and 141 healthy controls. DNA was extracted and genotypes determined by the Taqman PCR technique for characterization of the different genetic variants. Results The results show that there were no significant differences in allele frequencies for 3 of the chosen SNPs in the ORMDL3 , GSDMB , and IL1RL1 genes between the asthmatic and control groups with respective P values of 0.922, 0.331, and 0.937. However the T allele of rs10192157 of the IL1RL1gene was associated with protection from asthma ( P value=0.010). Conclusion These results indicate that there is no marked effect of rs3744246, rs2305480, and rs1420101 polymorphisms of the ORMDL3 , GSDMB , and IL1RL1 genes on asthma risk in the Algerian population. However, a protective effect of the rs10192157 polymorphism of the IL1RL1 gene was found.