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MMP-9 and Col II were detected by immunofluorescence staining. MMP-9 was diffusely stained in the control group, but not in the SAP and SAP-MSC groups. The Col II detected by immunofluorescence staining was less abundant in the control group compared to the normal and MSC groups. Scale bar 100 μm.
Abbreviations: MMP, matrix metalloproteinase; Col II, collagen type II; DAPI, 4′,6-diamidino-2-phenylindole; MSC, mesenchymal stem cell; SAP, self-assembled peptide.
