Fig. 2.

ELISA detection of TGF-β1 concentrations in mouse lungs after irradiation. Mice of two irradiated groups, exposed to a single fraction of X-ray irradiation (12 Gy) to the thorax, were treated with NS or GA. The GA group was not exposed to irradiation. Concentrations of the cytokine TGF-β1 in lung homogenates were determined by ELISA 2 days and 17 days after irradiation. Data are the mean ± SD.*P < 0.05, vs control group; ^#P < 0.05, vs IR + NS group; ^&P < 0.05, vs GA group, at identical time-points, by one-way ANOVA (followed by Bonferroni's multiple comparison test). IR = irradiation, NS = normal saline, GA = glycyrrhetinic acid.