(A) The expression of miR-137 in each group. (B) Up-regulation of miR-137 can reverse the significantly reduced cell proliferation ability under LPS intervention. (C) Up-regulation of miR-137 can reverse the significantly increased apoptosis rate under LPS intervention. (D) Up-regulation of miR-137 can reverse the significantly increased inflammatory factors under LPS intervention. (E) Flow cytometry. Note: Compared with the control group, **P<0.01; Compared with LPS group, #P<0.05, ##P<0.01. Abbreviations: FITC, fluorescein isothiocyanate; IL-1β, interleukin-1β; IL-6, interleukin-6; LPS, lipopolysaccharide; miR, microRNA; NC, negative control; OA, osteoarthritis; PI, propidium iodide; TNF-α, tumor necrosis factor-α.