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Drug therapy is one of the typical treatments for post-injury inflammation of cartilage. Traditional Chinese herbs have potential as treatments, as their long history of clinical application has demonstrated they are effective and induce minimal side effects. Baicalin is a traditional Chinese medicine that has been used to treat inflammation, fever, ulcers and cancer for hundreds of years. Previous studies have demonstrated that baicalin may decrease levels of interleukin-1β and suppress the expression of type-I collagen, thus attenuating cartilage degeneration. In the present study, the effect of baicalin on chondrocytes was assessed by examining the morphology, proliferation, extracellular matrix (ECM) synthesis and cartilage-specific gene expression of chondrocytes. The results indicated that baicalin may promote the proliferation of articular chondrocytes, secretion of cartilage ECM and collagen type II, aggrecan and SRY box (Sox) 9 gene upregulation. The expression of collagen I, a marker of chondrocyte dedifferentiation, was downregulated by baicalin; therefore, baicalin may maintain the phenotype of chondrocytes. Within the recommended concentrations of baicalin ranging from 0.625-6.25 µmol/l cell proliferation was increased and a 1.25 µmol/l dose of baicalin exerted the most positive effect on articular chondrocytes. The results of the present study may therefore indicate that baicalin may be used as a novel agent promoting the repair of articular cartilage damage.

Protective effects of baicalin on rabbit articular chondrocytes in vitro