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Gene polymorphisms in VEGFA and COL2A1 are associated with response to inhaled corticosteroids in children with asthma.

Aim: The purpose of this study was to investigate the involvement of single-nucleotide polymorphisms in VEGFA, TBX21 and COL2A1 in the response to inhaled corticosteroids in asthmatic children. Subjects & methods: Children with mild-to-moderate asthma were enrolled in the study. The SEQUENOM MassARRAY method was used to sequence 27 SNP genotypes. By ranking the data from smallest to largest, we could infer whether the change in distribution of forced expiratory volume in one second/forced vital capcacity (FEV1/FVC) and fractional exhaled nitric oxide differed between genotype groups. Results: VEGFA rs3025039 T allele carriers had a smaller change in FEV1 than CC carriers (p = 0.040), and in COL2A1 rs3809324, the frequency of T allele carriers was lower than that of GG carriers (p = 0.048). rs3025039 was also associated with changes in FEV1/FVC (p = 0.016). Conclusion: VEGFA and COL2A1 polymorphisms are significantly associated with the response to inhaled corticosteroids in asthmatic children.