[Association of the gene and gene-environmental interaction with the susceptibility to childhood bronchial asthma].

Objectives: To study the association of the single nucleotide polymorphisms (SNPs) of the adenylyl cyclase IX () gene at rs1967309, rs2230739, rs2601814, rs2601825, rs2601796, and rs2283497 loci and gene-environment interaction with childhood bronchial asthma (asthma for short).

Methods: A total of 123 children with asthma who attended the hospital from March 2019 to September 2021 were enrolled as the asthma group, among whom 84 (68.3%) had mild-to-moderate attacks and 39 (31.7%) had severe attacks. A total of 124 healthy children were enrolled as the control group. The association of the SNPs and haplotypes of the gene at the above 6 loci with the susceptibility to childhood asthma was evaluated. The method of generalized multifactor dimensionality reduction was used to analyze gene-environment interaction.

Results: Polymorphisms were observed for the gene at the above six loci in both the asthma and control groups, and there were significant differences in genotype and allele frequencies at the rs1967309 locus between the two groups (<0.05). There was no significant difference in the distribution frequency of haplotypes TA and GG between the asthma and control groups (>0.05). The generalized multifactor dimensionality reduction analysis showed interaction between rs1967309 locus and allergen contact (<0.05), which increased the risk of asthma (=1.585, <0.05).

Conclusions: The rs1967309 locus of the gene is associated with the susceptibility to childhood asthma, and the locus and allergen contact have a synergistic effect on the development of asthma.