期刊
PHYTOMEDICINE
卷 91, 期 -, 页码 -出版社
ELSEVIER GMBH
DOI: 10.1016/j.phymed.2021.153657
关键词
Osteoarthritis; Avicularin; Extracellular matrix degradation; inflammation; TRAF6
资金
- National Natural Science Foundation of China [81673554, CPU2018GF03]
The study demonstrates that avicularin protects against cartilage extracellular matrix degradation and inflammation by inhibiting the TRAF6/MAPK pathway and targeting TRAF6, making it a potential therapeutic agent for osteoarthritis.
Background: Osteoarthritis (OA) is an intractable degenerative disease of the whole joint, which is characterized by synovitis inflammation, cartilage damage, and chronic pain. Tumor necrosis factor receptor (TNFR)-associated factor 6 (TRAF6) performs an important role in OA. Purpose: We aim to investigate avicularin to protect cartilage extracellular matrix degradation (ECM) and suppresses inflammation both in rat and human chondrocytes. Methods: 5-Ethynyl-2' -deoxyuridine (EdU) staining, Quantitative real-time PCR, TRAF6 plasmid transfection, Western blot, Measurement of nitric oxide (NO), ROS detection and Immunofluorescence were utilized in vitro. micro-CT scanning, Safranin O-Fast Green, toluidine blue and immunohistochemistry staining were performed in vivo. Results: In vitro, avicularin attenuates the degradation of ECM and inflammation, which could inhibit the activation of TRAF6/MAPK pathway via targeting TRAF6. Increased MMP3 and MMP13 expressions and decreased Aggrecan and Collagen II levels were observed in anterior cruciate ligament transection (ACLT) induced osteoarthritic rats. Interestingly, intra-articular injection of avicularin attenuates this phenomenon. Conclusions: Taken together, our results indicate that avicularin suppresses cartilage extracellular matrix degradation and inflammation via TRAF6/MAPK activation by targeting TRAF6. These observations identify TRAF6 as a relevant drug target, and avicularin may as a potential therapeutic agent in osteoarthritis.
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