Fig. 3

Degradation properties of methacrylated gelatin-exosomes (GelMA-Exos) and GelMA in vivo and in vitro. a Every five days, the weights of GelMA-Exos were measured. b GelMA-Exos were implanted subcutaneously into mice and taken out and weighed after 28 d. c The hydrogel was implanted under the skin of the backs of mice. Data are presented as the mean ± standard deviation (SD). Non-significant (ns): compared with 0 d, P > 0.05