Xu Fangqi, Zhuang Chen, Yao Lufeng, Xu Yiwen, Cao Qihua, Fu Zherui, Wang Longfeng, Zhu Yuan, Xue Deting, Zhang Ning, Yu Xiaohua, Hu Gangfeng, Lin Feng
Department of Orthopedics Surgery, The First People's Hospital of Xiaoshan District, Xiaoshan Affiliated Hospital of Wenzhou Medical University, Hangzhou, 310000, PR China.
Alberta Institute, Wenzhou Medical University, Wenzhou, 315000, PR China.
Mater Today Bio. 2025 Jul 26;34:102138. doi: 10.1016/j.mtbio.2025.102138. eCollection 2025 Oct.
Cellular senescence plays a crucial role in the progression of various diseases, and targeting senescence is a potential therapeutic strategy for osteoarthritis (OA). However, the complex biomechanical environment surrounding chondrocytes significantly affects their senescence process. Currently, few biomaterials are available that have the ability to modulate stresses and counteract chondrocyte senescence. In this study, we used cationic liposomes as the core of the crosslinked structure of the hydrogel network through imine bonding to construct a high-mobility network hydrogel microsphere system (Res@Lipo@HMs). The deformability of liposomes endowed mobility to the crosslinked structure of the hydrogel network. This system not only enhanced joint lubrication through a rolling mechanism but also distributed mechanical stress on chondrocytes by increasing the elastic deformation capacity of the microspheres. Moreover, this approach delayed chondrocyte senescence, improved chondrocyte physiological function, and slowed down OA progression by enhancing mitochondrial function and inhibiting senescence pathways. This study offers new insights into antisenescence strategies for chondrocyte therapy.
细胞衰老在多种疾病的进展中起着关键作用,针对衰老进行干预是骨关节炎(OA)的一种潜在治疗策略。然而,软骨细胞周围复杂的生物力学环境会显著影响其衰老过程。目前,能够调节应力并对抗软骨细胞衰老的生物材料很少。在本研究中,我们通过亚胺键合将阳离子脂质体用作水凝胶网络交联结构的核心,构建了一种高迁移率网络水凝胶微球系统(Res@Lipo@HMs)。脂质体的可变形性赋予了水凝胶网络交联结构流动性。该系统不仅通过滚动机制增强了关节润滑,还通过增加微球的弹性变形能力将机械应力分布在软骨细胞上。此外,这种方法通过增强线粒体功能和抑制衰老途径延缓了软骨细胞衰老,改善了软骨细胞的生理功能,并减缓了OA的进展。本研究为软骨细胞治疗的抗衰老策略提供了新的见解。