Objective o observe the expression of histamine H4 R and IL-12(P70) in children with asthma and the effect of Yupingfeng granules on the expression of H4 R and IL-12(P70) in asthmatic children. Methods Sixty children with bronchial asthma during acute exacerbation,60 children with bronchial asthma during clinical remission and 60 healthy children were enrolled in the study. The levels of H4 R mRNA and protein in peripheral blood mononuclear cells and serum IL-12(P70) of three groups were detected. To detect...