Fig. 6.

Histological evaluations (H&E staining) and CD31, DMP-1 and DSPP immunohistochemical staining at 1 month after each group being subcutaneously injected into nude mice back. The black arrows indicate the gap between microspheres and connective tissues, red arrows indicate newly formed vessels, black stars indicate the DMP-1 positive cells, yellow stars indicate DSPP positive cells, red stars indicate CD31 positive cells, and M represents the location of residual microspheres. Scale bars ​= ​100 ​μm.