Fig. 1

PNS-R1 reduces caspase3 expression of bronchial epithelial cells induced by Dex in asthmatic mice. a Chemical structure of PNS-R1 (C47H80O18, molecular weight = 933.13, purity > 98%). b Protocol for inducing asthmatic mice. c Immunohistochemical of caspase3 expression in bronchial epithelial cells (brown represents positive expression). d Statistics of immunohistochemical positive expression. e The protein expression of caspase3 in mouse lung tissue was determined by western blot analysis. f The results of the western blot were quantified. Data represent the average ± SD. Significant differences between two are indicated as *P < 0.05, Dex group vs Dex + PNS-R1 group