ABSTRACT
Aim: To investigate the role of manganese superoxide dismutase (MS0D) protein expression in the proliferation and apoptosis of fibroblast-like synoviocyte (RA-FLS) in rheumatoid arthritis mediated by resveratrol(Res). Methods: After RA-FLSs was treated with Res, the expression of MnSOD protein was detected by CCK-8 method, and the expression of Mn- SOD protein was detected by, Western blot. After lentivirus infection with RA-FLSs, 8 mg · L-1 purine mycin was used to screen the infected cells, and three stable cell lines were established; MnSOD overexpression, MnSOD interference and MnSOD control. The mitochondria reactive oxygen species (mtROS) levels of each cell line treated with 5 μmol · L-1 hydrogen peroxide (H2O2) and 200 mol · L-1 Res were detected by laser confocal microscopy, and cell apoptosis was detected by flow cytometry. Results Res could inhibit the proliferation and the expression of MnSOD in RA- FLSs. The lentivirus-mediated MnSOD regulation could significantly increase or decrease the expression of Mn- SOD in RA-FLSs. MnSOD over expression could decrease the level of mtROS and apoptosis of the RA- FLSs treated with 5 μmol · L-1 H2O2 and 200 μmol · L-1 Res. While the MnSOD RNAi showed the opposite results. Conclusions: Res may up-regulate mtROS levels by inhibiting the expression of MnSOD, thus promoting the apoptosis of RA-FLSs.