Fig. 3From: PTH (1-34) enhances the therapeutic effect of bone marrow mesenchymal stem cell-derived exosomes by inhibiting proinflammatory cytokines expression on OA chondrocyte repair in vitroThe effect of ExoBMSC and ExoPTH on OA chondrocyte proliferation was assayed by immunofluorescence staining for ki67 and PCNA. A Immunofluorescence staining for ki67 and PCNA. B The positive expression ratio of ki67. C The positive expression ratio of PCNA. Data are presented as the mean ± SD, *p < 0.05 versus OA group and #p < 0.05 versus ExoBMSC group. Bars = 50 μm. Ctrl, control; OA, osteoarthritis; ExoBMSC, exosomes derived from BMSCs; ExoPTH, exosomes derived from PTH-preconditioned BMSCs; BMSCs, bone marrow mesenchymal stem cellsBack to article page