期刊
JOURNAL OF CELLULAR AND MOLECULAR MEDICINE
卷 25, 期 4, 页码 1896-1910出版社
WILEY
DOI: 10.1111/jcmm.15857
关键词
ATM; ATR; p53 signalling pathway; Cyclin I; extracellular vesicles; inflammation; MicroRNA-34a; rheumatoid arthritis
资金
- Natural Science Foundation of Jiangsu Province [BK20181133]
- Key Project in Natural Science Research in Higher Education Institutions of Anhui Province [KJ2018A0814, KJ2019A1096]
- Scientific Research Project of Anhui Provincial Health and Family Planning Commision [2018SEYL008]
The study demonstrated that miR-34a contained in BM-MSC-derived Evs could reduce RA inflammation by inhibiting the cyclin I/ATM/ATR/p53 signaling pathway.
Extracellular vesicles (Evs) participate in the development of rheumatoid arthritis (RA), but the mechanisms remain unclear. This study aimed to determine the mechanism by which microRNA-34a (miR-34a) contained in bone marrow mesenchymal stem cell (BM-MSC)-derived Evs functions in RA fibroblast-like synoviocytes (RA-FLSs). BM-MSC-derived Evs and an Evs inhibitor were extracted. A rat model of RA was established. miR-34a gain- and loss-of-function experiments were performed, and the inflammation in rat synovial fluid and tissues was detected. The role of miR-34a in RA-FLSs was also measured in vitro. The target gene of miR-34a was predicted using the online software TargetScan and identified using a dual-luciferase reporter gene assay, and the activation of the ATM/ATR/p53 signalling pathway was assessed. BM-MSC-derived Evs mainly elevated miR-34a expression, which reduced RA inflammation in vivo and inhibited RA-FLS proliferation and resistance to apoptosis in vitro, while inhibited miR-34a expression enhanced RA development. In addition, miR-34a could target cyclin I to activate the ATM/ATR/p53 signalling pathway, thus inhibiting abnormal RA-FLS growth and RA inflammation. Our study showed that miR-34a contained in BM-MSC-derived Evs could reduce RA inflammation by inhibiting the cyclin I/ATM/ATR/p53 signalling pathway.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据