Fig 1: HIF‐1α (hypoxia‐inducible factor 1α) and Notch1 (neurogenic locus notch homolog protein 1) expression by western blotting analysis. Normal: Mice treated with normal saline; Model: asthmatic model mice treated with normal saline; LD: asthmatic model mice treated with low‐dose Vit D (100 IU/kg/day); MD: asthmatic model mice treated with middle‐dose Vit D (500 IU/kg/day); HD: asthmatic model mice treated with high‐dose Vit D (1000 IU/kg/day). ***p < .001, compared with Normal; # p < .05, ## p < .01, ### p < .001, compared with Model; $ p < .05, $$ p < .01, compared with LD group; & p < .05, compared with MD group