MIR-140-5p affects chondrocyte proliferation, apoptosis, and inflammation by targeting HMGB1 in osteoarthritis

• Published in: Inflammation research Vol. 69; no. 1; pp. 63 - 73
• Main Authors: Wang, Yingjie, Shen, Songpo, Li, Zeng, Li, Weifeng, Weng, Xisheng
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 2020; Springer Nature B.V
• Subjects: 1-Phosphatidylinositol 3-kinase; AKT protein; Allergology; Apoptosis; Arthritis; Bioinformatics; Biomedical and Life Sciences; Biomedical materials; Biomedicine; Cholecystokinin; Chondrocytes; Dermatology; DNA microarrays; Flow cytometry; HMGB1 protein; Identification methods; IL-1β; Immunology; Interleukins; Interstitial collagenase; Kinases; Matrix metalloproteinase; Metalloproteinase; Neurology; Original Research Paper; Osteoarthritis; Pharmacology/Toxicology; Rheumatology; Signal transduction; Target recognition; Tumor necrosis factor-TNF; Tumor necrosis factor-α; Western blotting; MiR-140-5p; HMGB1; PI3K/AKT signaling pathway; Osteoarthritis
• ISSN: 1023-3830; 1420-908X
• DOI: 10.1007/s00011-019-01294-0

Objective This study aimed to test the expression and biological function of miR-140-5p in osteoarthritis (OA), and identify its target gene and explore its mechanism in OA. Methods Differential genes were screened and analyzed by gene microarray and WGCNA analysis. The normal human chondrocytes C28/I2 were induced by IL-1β to construct the OA cell model. The expression of miR-140-5p and high mobility group box 1 (HMGB1) was quantified by quantitative real-time PCR (qRT-PCR) in OA tissues and IL-1β-induced chondrocytes. Western blotting was performed to evaluate the expression of HMGB1 and PI3K/AKT pathway activation. The concentrations of tumor necrosis factor (TNF)-α, interleukin (IL)-6, MMP-1 and MMP-3 were determined by ELISA. CCK-8 and flow cytometry were conducted to determine the cellular capabilities of proliferation and cell apoptosis. Results Bioinformatics analysis demonstrated that HMGB1 was highly expressed in OA and activated PI3K/AKT pathway. Also, HMGB1 was predicted as a target of miR-140-5p. The levels of miR-140-5p were negatively correlated with HMGB1 in OA tissues and IL-1β-induced chondrocytes. The overexpression of miR-140-5p reduced the expression of HMGB1 protein, p-AKT (Ser473) and p-PI3K in IL-1β-induced chondrocytes. Besides, the expression of p-AKT (Ser473) and p-PI3K was significantly upregulated by employing miR-140-5p inhibitor, but retrieved after treating with LY294002. Furthermore, miR-140-5p inhibited inflammation, matrix metalloprotease expression and apoptosis in IL-1β-induced chondrocytes through regulating HMGB1. Conclusion MiR-140-5p was down-regulated while HMGB1 was upregulated in OA. MiR-140-5p could inhibit the PI3K/AKT signaling pathway and suppress the progression of OA through targeting HMGB1.