Fig. 6.

(a) Representative immunofluorescence staining images display the protein expression level of collagen II in the IL-1β treated chondrocytes, which are co-cultured with the GelMA, GelMA@DMA-MPC and GelMA@DMA-MPC@DS hydrogel microspheres for 12 h. Green: collagen II; Blue: cell nuclei; Red: cell F-actin. (b) The quantitative data show the comparison of protein expression level of collagen II via fluorescence intensity. (n = 3, * and ^# represent P < 0.05 by comparing with the control and blank groups, respectively).