hUMSCs-exo@Cyasterone protects the cell model of steroid-induced femur head necrosis by regulating N-glycosylation modification of CTSD-N258A - Youqiang Sun; Mengmeng Liang; Yuemeng Xing; Yifan Duan; Baogui Deng; Xiaobing Xiang (PLoS ONE, 2026)