Fig. 2From: Extracellular vesicles derived from LPS-preconditioned human synovial mesenchymal stem cells inhibit extracellular matrix degradation and prevent osteoarthritis of the knee in a mouse modelEffects of LPS-pre EVs on proliferation and apoptosis of chondrocytes. a, b Proliferation rate of chondrocytes was determined by EdU assay (n = 3, one-way ANOVA). c, d Apoptosis rate of chondrocytes was determined by TUNEL assay (n = 3, one-way ANOVA). e, f Apoptosis rate of chondrocytes was analyzed by flow cytometry (n = 3, one-way ANOVA). b, d, f Values are presented as mean ± SD. *P < 0.05, **P < 0.01, ***P < 0.001, one-way ANOVABack to article page