Exosome-loaded methacrylated silk fibroin hydrogel delays intervertebral disc degeneration by DKK2-mediated mitochondrial unfolded protein response

Xiao Lu, Zhidi Lin, Liujingzhou Li, Guangyu Xu, Dachuan Li, Zhaoyang Gong, Juan Wu, Tian Gao, Xingyu Guo, Chenpei Xu, Xinlei Xia, Feizhou Lyu, Fei Zou, Jianyuan Jiang, Zhengzhong Shao, Xiaosheng Ma, Hongli Wang, Jian Song