Heme Oxygenase-1-Mediated Autophagy Protects against Oxidative Damage in Rat Nucleus Pulposus-Derived Mesenchymal Stem Cells

被引:17
作者
Chen, Sheng [1 ]
Liu, Sheng [1 ]
Zhao, Lei [1 ]
Lin, Hui [1 ]
Ma, Kaige [1 ]
Shao, Zengwu [1 ]
机构
[1] Huazhong Univ Sci & Technol, Dept Orthopaed, Union Hosp, Tongji Med Coll, Wuhan 430022, Peoples R China
基金
中国国家自然科学基金;
关键词
INTERVERTEBRAL DISC; CHONDROGENIC DIFFERENTIATION; MECHANISM; HYPOXIA;
D O I
10.1155/2020/9349762
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
Although endogenous nucleus pulposus-derived mesenchymal stem cell- (NPMSC-) based regenerative medicine has provided promising repair strategy for intervertebral disc (IVD) degeneration, the hostile microenvironments in IVD, including oxidative stress, can negatively affect the survival and function of the NPMSCs and severely hinder the endogenous repair process. Therefore, it is of great importance to reveal the mechanisms of the endogenous repair failure caused by the adverse microenvironments in IVD. The aim of this study was to investigate the effect of oxidative stress on the rat NPMSCs and its underlying mechanism. Our results demonstrated that oxidative stress inhibited cell viability, induced apoptosis, and increased the production of reactive oxygen species (ROS) in NPMSCs. In addition, the results showed that the expression level of heme oxygenase-1 (HO-1) increased at an early stage but decreased at a late stage when NPMSCs were exposed to oxidative stress, and the oxidative damages of NPMSCs could be partially reversed by promoting the expression of HO-1. Further mechanistic analysis indicated that the protective effect of HO-1 against oxidative damage in NPMSCs was mediated by the activation of autophagy. Taken together, our study revealed that oxidative stress could inhibit cell viability, induce apoptosis, and increase ROS production in NPMSCs, and HO-1-mediated autophagy might act as a protective response to the oxidative damage. These findings might enhance our understanding on the mechanism of the endogenous repair failure during IVD degeneration and provide novel research direction for the endogenous repair of IVD degeneration.
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收藏
页数:14
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