Abstract
Objective
There is a lack of effective and long-term safe drugs for the treatment of osteoarthritis (OA). Tetrandrine (Tet) has been approved and used to treat rheumatoid arthritis for several decades, but its effect on OA has not been investigated. Herein, we explored the effect of Tet on OA and its underlying mechanism.
Methods
OA was induced using destabilization of the medial meniscus (DMM) in C57BL/6J mice. The animals were randomly divided into sham, DMM, Tet, celecoxib (CXB), and indomethacin (INDO) groups. Each group was given solvent or corresponding drugs by gavage for 7 weeks after convalescence. Pathological staining, OARSI scores, micro-computed tomography and behavior tests were performed to evaluate the effects of Tet.
Results
Tet remarkably alleviated cartilage injury in the knee joint, limited bone remodeling in the subchondral bone, and delayed progression of OA. Tet also significantly relieved joint pain and maintained function. Further mechanistic studies revealed that Tet lowered inflammatory cytokine levels and selectively suppressed gene and protein expression of cyclooxygenase (COX)-2 but not COX-1 (P<0.01). Tet also reduced the production of prostaglandin E2 without damaging the gastric mucosa.
Conclusion
We found that Tet could selectively inhibit COX-2 gene expression and decrease cytokine levels in mice, thus reducing inflammation and improving OA without obvious gastric adverse events. These results provide a scientific basis for the clinical application of Tet in the treatment of OA.
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Conflict of Interest Statement
The authors declare that there is no conflict of interest with any financial organization or corporation or individual that can inappropriately influence this work.
This study was supported by the Natural Science Foundation of Hubei Province (No. 2020CFB868).
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Gao, P., Rao, Zw., Li, M. et al. Tetrandrine Represses Inflammation and Attenuates Osteoarthritis by Selective Inhibition of COX-2. CURR MED SCI 43, 505–513 (2023). https://doi.org/10.1007/s11596-023-2725-6
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DOI: https://doi.org/10.1007/s11596-023-2725-6