Abstract:Objective To study the relationship of vitamin D receptor gene polymorphisms with children asthma and wheezy bronchitis. Methods Eighty-two cases of asthma and wheezy bronchitis treated in our hospital from September 2012 to September 2014 were analyzed and divided into two groups: 41 cases of bronchial asthma were into experimental group 1, 41 cases of asthmatic bronchitis were into experimental group 2. There were 41 cases in normal control group. The three groups used polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) to detect vitamin D receptor ApaⅠ, FokⅠ, BsmⅠ and TaqⅠ gene polymorphisms. The frequency of genotype distribution of the 3 groups were observed and the correlations of the vitamin D receptor gene polymorphisms with children asthmatic diseases were studied. Results The frequency of vitamin D receptor ApaⅠ, FokⅠ, BsmⅠ and TaqⅠ genotype distribution in the experimental group 1 had significant differences from that in the group 2 and the normal control group (P < 0.05). The vitamin D receptor ApaⅠ, FokⅠ, BsmⅠ and TaqⅠ allele frequency of the experimental group 1 had significant differences from that of the group 2 and the normal control group (P < 0.05). Conclusions The vitamin D receptor gene polymorphisms are closely correlated with asthmatic diseases, which provides a reliable basis for treatment of children with asthmatic diseases.