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Cell Stress Chaperones. 2015 Sep;20(5):781-6. doi: 10.1007/s12192-015-0600-5. Epub 2015 Jun 5.

Inhibitory effects of EGb761 on the expression of matrix metalloproteinases (MMPs) and cartilage matrix destruction.

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Department of Joint Surgery, Weifang Medical University, Weifang, China.


Cytokines such as tumor necrosis factor alpha (TNF-α)-induced expression of matrix metalloproteinase (MMP) play a pivotal role in the destruction of articular cartilage in patients who are suffering from osteoarthritis (OA). Collagen type II, the basis for articular cartilage, can be degraded by MMP-1, MMP-3, and 13. EGb761, the standardized extract of Ginkgo biloba produced by Dr. Willar Schwabe Pharmaceuticals, has shown its anti-inflammatory capacity. This study aimed to determine a mechanism whereby EGb761 may inhibit cartilage degradation. Our results indicated that pretreatment with EGb761 abolishes MMP-1, MMP-3, and MMP-13 gene expression and protein expression induced by TNF-α in human chondrocyte monolayer. In addition, the reduction of the tissue inhibitor of metalloproteinase-1(TIMP-1) and metalloproteinase-2 gene expression induced by TNF-α was rescued by pretreatment with EGb761. Importantly, TNF-α-induced degradation of collagen type II was ameliorated by EGb761 in a dose-dependent manner. Mechanistically, our results indicated that EGb761 treatment attenuated TNF-α-induced NF-κB activation. These actions of EGb761 suggest a mechanism by which EGb761 may act to prevent cartilage breakdown in arthritis.

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