ABSTRACT
Objective To explore the relationship between levels of serum 25-(OH) D3 and changes in Th1/Th2 cell balance in infants with recurrent wheezing.Methods Sixty cases of infants with recurrent wheezing were involved and 60 cases of healthy children were selected as controls.Enzyme linked immunosorbent assay (ELISA) was used to detect the levels of serum 25-(OH) D3 and double-antibody sandwich (ABC-ELISA) was used to detect the serum levels of interferon-γ(IFN-γ),interleukin (IL)-4,IL-13,and then the relationship between the levels of serum 25-(OH) D3 and changes in Th1/Th2 balance in infants with recurrent wheezing were explored.Results Serum 25-(OH) D3 levels decreased significantly in the infants with recurrent wheezing group compared with those of the healthy control group [(18.24 ± 5.64) μg/L vs (37.85 ± 7.78) μg/L] (t =15.810,P =0.000).Serum IFN-γ levels decreased significantly in the infants with recurrent wheezing group compared with those of the healthy control group [(11.20 ± 2.08) ng/L vs (20.68 ± 3.87) ng/L] (t =16.700,P =0.000).In contrast,serum IL-4,IL-13 levels increased significantly in the infants with recurrent wheezing group compared with those of the healthy control group[IL-4:(28.61 ±6.44) ng/L vs (22.14±5.29) ng/L;IL-13:(20.02±4.83) ng/L vs (17.72± 4.06) ng/L] (t =6.201,P =0.000 ; t =2.829,P =0.006).Th1/Th2 in the infants with recurrent wheezing group were lower than that those of the healthy control group,and there was statistically significant difference between two groups(0.41 ± 0.12 vs 1.00 ± 0.36) (t =11.796,P =0.000).Serum 25-(OH) D3 levels were negatively correlated with Th1/Th2 in the infants with recurrent wheezing(r =-0.649,P =0.000).There were no correlation between serum 25-(OH) D3 levels and Thl/Th2 in the healthy control group(r =-0.217,P =0.096).Conclusions Low serum 25-(OH) D3 may be the risk factor for recurrent wheezing in infants.Serum 25-(OH) D3 levels were negatively correlated with Th1/Th2 in the infants with recurrent wheezing group,which show that recurrent wheezing in the infants is closely related to allergic reaction.