LncRNA MEG3 suppresses erastin-induced ferroptosis of chondrocytes via regulating miR-885-5p/SLC7A11 axis

Springer Science and Business Media LLC - Tập 51 - Trang 1-10 - 2024
Chongtao Zhu1,2, Bin Chen3,2, Xu He4,2, Weiyuan Li4,2, Shengyu Wang5, Xun Zhu5, Yan Li4,2, Ping Wan4,2, Xiaolu Li4,2
1Laser Medical Center, The First People’s Hospital of Yunnan Province, Kunming, China
2The Affiliated Hospital of Kunming University of Science and Technology, Kunming, China
3Orthopaedics, The First People’s Hospital of Yunnan Province, Kunming, China
4Yunnan Province Clinical Research Center for Geriatrics, The First People’s Hospital of Yunnan Province, Kunming, China
5Medical School, Kunming University of Science and Technology, Kunming, China

Tóm tắt

Ferroptosis is involved in osteoarthritis development; however, the roles of long noncoding RNAs (lncRNAs), including lncRNA MEG3, in the regulation of ferroptosis in osteoarthritis are still unclear. In this study, qRT‒PCR and Western blotting assays were used to detect the expression of lncRNA MEG3, miR-885-5p, SLC7A11 and GPX4; MDA and CCK-8 assays were applied to analyse cellular MDA levels and cell viability, respectively. Erastin elevated cellular MDA levels and decreased the viability of chondrocytes and the erastin-induced decline in cell viability was reversed by a ferroptosis inhibitor (ferrostatin-1). Erastin downregulated lncRNA MEG3, SLC7A11 and GPX4 and upregulated miR-885-5p. Silencing of lncRNA MEG3 increased miR-885-5p and downregulated SLC7A11 and GPX4 and further sensitized chondrocytes to erastin-induced ferroptosis. In contrast, overexpression of lncRNA MEG3 had opposite effects. Dual luciferase assays confirmed binding between lncRNA MEG3 and miR-885-5p and between miR-885-5p and the 3′UTR of SLC7A11. In the synovial fluids from patients with osteoarthritis compared with synovial fluids from normal controls, the RNA levels of lncRNA MEG3 and SLC7A11 were decreased and the miR-885-5p expression level was increased. Our findings indicated that lncRNA MEG3 overexpression alleviated ferroptosis in chondrocytes by affecting the miR-885-5p/SLC7A11 signalling pathway.

Tài liệu tham khảo

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