Investigating the Association of ADAM33 Single Nucleotide Polymorphisms (SNPs) with Susceptibility to Allergic Asthma in Azerbaijan Population of Iran: A Case-control Study

Asthma, affecting a growing number of populations, is a clinical condition with complex cellular and genetic factors. Single nucleotide polymorphisms (SNPs) in gene coding for molecules, which play major roles in the immunopathogenesis of asthma have been considered recently as genetic predisposing factors this disease. Possible association between two SNPs in a disintegrin and metalloprotease 33 (ADAM33), which participates in airway remodeling, and susceptibility to asthma was studied in this study. 190 patients with asthma and 180 healthy controls were enrolled in this case-control study. Using conventional PCR method, specific bands were amplified and the frequency of genotypes of T1 (rs2280091) and V4 (rs2787094) ADAM33 SNPs were determined by digestion with NcoI and PstI, respectively. The results showed that the frequency of genotypes of T1 and V4 were not significantly different between patients and controls (p=0.54 and p=0.85, respectively). On the other hand, no significant differences were seen in allele frequency of both T1 and V4 SNPs (p=0.15 and p=0.47, respectively). In agreement with some other studies in different populations, our results showed no association between frequency of genotype or alleles of both T1 and V4 SNPs in ADAM33 gene and predisposition to asthma in Azerbaijan population of Iran. Genetic differences in different ethnic groups might be involved in such inconsistent results. More studies in populations with larger number of patients and healthy individuals are needed for concluding remarks for involvement of ADAM33 SNPs in asthma.