Fig. 7

Comparison of staining results of dorsal skin in each group after 10 days’ pretreatment. a Results of HE staining and CD31 immunohistochemical staining. a, d and g are the results of HE staining under a microscope with a 40 ×; b, e and h are the results of HE staining under a microscope with a 200 ×. c, f and i are the results of CD31 immunohistochemical staining under a microscope with a 200 ×. Blood vessels are shown by the red arrows in the figure. It can be observed that the HuMSCs group and GS-HuMSCs-CM group have more blood vessels. b Counting results. A is the thickness of the skin and subcutaneous layer under a 40 × microscope, B and C are the comparison of total microvascular diameter and MVD count under 200 × microscope (*P < 0.05; **P < 0.01; ***P < 0.001)