Fig. 1

HE staining, MLI and DI score of lung tissue. A Experimental protocol of COPD mice modeling and treatment; B representative images of HE staining of lung tissue in the control, COPD, COPD+EPCs and COPD+P5091 groups, with a scale of 50 μm; C and D scores of pathomorphological indexes MLI and DI of lung tissue in the four groups. In C and D, p values were calculated by one-way ANOVA in multiple groups and two-sided t-test between two groups. *p < 0.05; ns means p > 0.05