MicroRNA-21 Promotes Proliferation of Fibroblast-Like Synoviocytes through Mediation of NF-κB Nuclear Translocation in a Rat Model of Collagen-Induced Rheumatoid Arthritis

作者：Chen, Ying; Xian, Pei-Feng; Yang, Lu^*; Wang, Sheng-Xu^*

来源：Biomed Research International, 2016, 2016: 9279078.

DOI：10.1155/2016/9279078

• EXPRESSION
• MIR-21
• CELLS
• SIGNATURES
• TARGETS
• PDCD4

MicroRNA-21 (miR-21) is overexpressed in patients with rheumatoid arthritis (RA). This study was designed to investigate the effect and mechanism of miR-21 on cell proliferation in fibroblast-like synoviocytes (FLS) of RA. FLS were primary-cultured from a rat RA model. RA-FLS and normal FLS were infected with lentivirus (anti-miR-21 or pro-miR-21) for overexpression or downregulation of miR-21, respectively. The effects of miR-21 overexpression or inhibition on nucleoprotein NF-kappa B levels and FLS cell proliferation were evaluated by western blotting and MTT assays. The effects of an inhibitor of NF-kappa B nuclear translocation (BAY 11-7082) were also evaluated. The results showed that the levels of miR-21 and nucleoprotein NF-kappa B were increased in FLS of RA model rats compared to the control group. Downregulation of miR-21 in RAFLS led to a significant decrease in nucleoprotein NF-kappa B levels and cell proliferation rates compared to the antinegative control (NC) group. However, miR-21 overexpression in normal FLS resulted in a significant increase of nucleoprotein NF-kappa B levels and cell proliferation rates compared to the pro-NC group. The effects of miR-21 overexpression were reversed by BAY 11-7082. We concluded that upregulated miR-21 in FLS in RA model rats may promote cell proliferation by facilitating NF-kappa B nuclear translocation, thus affecting the NF-kappa B pathway.

• 出版日期2016
• 单位南方医科大学