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. 2022 Jan 6;20:25. doi: 10.1186/s12951-021-01230-7

Fig. 4.

Fig. 4

In vitro and in vivo recruitment of stem cells by the different hydrogels. A, B Crystal violet staining of the migrated BMSCs in the GelMA group, GE group and GelMA/ECM-PFS group in vitro, plus a statistical analysis. C Confocal images of endogenous stem cell migration assay in vivo. D The total number of cells recruited into the cartilage defect site. E The number of CD90 and CD105 double-positive cells recruited into the cartilage defect site. Data are the means ± SD (*p < 0.05, n = 3)