Fig. 4From: miR-21-5p protects IL-1β-induced human chondrocytes from degradationTo identify senescent cells, chondrocytes were stained with SA β-gal, and observed under a light microscope (magnification × 100). Values represent the mean ± SD from three independent replicate experiments.*P < 0.05 compared with the normal group. #P < 0.05 compared with the OA groupBack to article page