Abstract
Growing data have indicated that the miR-17–92 cluster is implicated in inflammatory response and rheumatoid arthritis (RA). This study was aimed to investigate the effects of miR-92a on the proliferation and migration of rheumatoid arthritis fibroblast-like synoviocytes (RA-FLSs). Our results showed that miR-92a was significantly down-regulated in RA synovial tissue and RA-FLSs, whereas the protein level of AKT2 is increased. Restoration of miR-92a suppressed the proliferation and migration of RA-FLSs. Down-regulation of miR-92a promotes proliferation and migration of normal human FLSs. Dual luciferase reporter gene assay showed that miR-92a could specifically bind with the 3′UTR of AKT2 and significantly repressed the luciferase activity. Down-regulation or up-regulation of miR-92a significantly increased or decreased the protein and phosphorylation levels of AKT2. siRNA-mediated down-regulation of AKT2 significantly prevented cell proliferation and migration of RA-FLSs, which were similar to the effects induced by overexpression of miR-92a. Moreover, AKT2 overexpression rescued miR-92a-mediated suppressive effect on proliferation and migration of RA-FLS. Thus, miR-92a could inhibit the proliferation and migration of RA-FLSs through regulation of AKT2 expression.
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Acknowledgements
This study was supported by National Science Foundation of China (No. 30801159), the 12th Five Year Programs for the Medical Research of Chinese PLA (CWS12J014), The Capital Health Research and Development of Special grant (39770714 and 2016-3-5071).
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Communicated by Ullas Kolthur-Seetharam.
Corresponding editor: Ullas Kolthur-Seetharam
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Yu, FY., Xie, CQ., Jiang, Cl. et al. MiR-92a inhibits fibroblast-like synoviocyte proliferation and migration in rheumatoid arthritis by targeting AKT2. J Biosci 43, 911–919 (2018). https://doi.org/10.1007/s12038-018-9803-0
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DOI: https://doi.org/10.1007/s12038-018-9803-0