LOXL3 Inhibits Autophagy of Chondrocytes by Activating Rheb in Osteoarthritis

被引:0
|
作者
Zheng, Guang-ping [1 ]
Liu, Chen [1 ]
Zhang, Liang [2 ]
Zhong, Qiang [1 ]
Zhang, Yun [1 ]
Huang, Zhong-ming [1 ]
机构
[1] Nanchang Univ, Affiliated Ganzhou Hosp, Ganzhou Municipal Key Lab Bone & Joint Res, Ganzhou 341000, Peoples R China
[2] Shandong First Med Univ, Jinan Cent Hosp, Res Ctr Translat Med, Jinan 250013, Peoples R China
基金
中国国家自然科学基金;
关键词
osteoarthritis; LOXL3; Rheb; mTORC1; chondrocyte; autophagy; MTORC1;
D O I
10.1007/s11596-023-2820-8
中图分类号
R-3 [医学研究方法]; R3 [基础医学];
学科分类号
1001 ;
摘要
ObjectiveThis study aimed to investigate the potential mechanisms by which lysyl oxidase like 3 (LOXL3) affects the autophagy in chondrocytes in osteoarthritis (OA), specifically through the activation of mammalian target of rapamycin complex 1 (mTORC1).MethodsTo establish an OA model, rats underwent anterior cruciate ligament transection (ACLT). Chondrocytes were isolated from cartilage tissues and cultured. Western blotting was performed to assess the expression of LOXL3, Rheb, phosphorylation of p70S6K (p-p70S6K, a downstream marker of mTORC1), and autophagy markers. The autophagy of chondrocytes was observed using an immunofluorescence assay.ResultsThe expression levels of both LOXL3 and Rheb proteins were upregulated in chondrocytes isolated from the OA model cartilage, in comparison to those from the normal cartilage. The silencing of LOXL3 resulted in a decrease in the protein levels of Rheb and p-p70S6K, as well as an increase in the expression of autophagy-related proteins. Additionally, the effect of LOXL3 could be reversed through the silencing of Rheb. The results of the immunofluorescence assay confirmed the impact of LOXL3 and Rheb on chondrocyte autophagy.ConclusionLOXL3 inhibits chondrocyte autophagy by activating the Rheb and mTORC1 signaling pathways.
引用
收藏
页码:1195 / 1200
页数:6
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