Abstract
Baicalein is a flavonoid extracted from the roots of Scutellaria baicalensis and Scutellaria lateriflora. This compound exerts various biochemical activities, including antioxidant and anti-inflammatory effects. The study aimed to investigate the effect of baicalein on articular cartilage cells and elucidate its underlying mechanism. In primary rat chondrocyte cultures, treatment with baicalein demonstrated a reduction in the loss of proteoglycan and extracellular matrix degradation induced by interleukin (IL)-1β. Baicalein suppressed IL-1β-induced catabolic responses, including the expression and activation of matrix metalloproteinase (MMP)-13, MMP-3, and MMP-1. In addition, baicalein effectively reduced nitric oxide and prostaglandin E2 production, and it downregulated the expression of inducible nitric oxide synthase and cyclooxygenase-2 in primary rat chondrocytes. Furthermore, baicalein downregulated IL-1β-induced inflammatory chemokines and cytokines, such as GM-CSF and MCP-1. These findings suggest that baicalein could potentially mitigate the catabolic responses of IL-1β in chondrocytes, making it a promising candidate for both the prevention and treatment of osteoarthritis.
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Acknowledgements
The authors would like to extend their sincere thanks to Suk-Gyun Park and Seung Hee Kwon for their technical assistance.
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This work was supported by National Research Foundation of Korea (NRF) grants (NRF-2019R1A6A3A01090239, NRF-2019R1A5A2027521) and a Korean Fund for Regenerative Medicine (KFRM) grant (Ministry of Science and ICT, Ministry of Health and Welfare, 22A0104L1).
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Cho, I., Chung, KH., Kim, Y. et al. Baicalein inhibits IL-1β-induced extracellular matrix degradation with decreased MCP-1 expression in primary rat chondrocytes. Toxicol Res. 40, 237–246 (2024). https://doi.org/10.1007/s43188-024-00225-4
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DOI: https://doi.org/10.1007/s43188-024-00225-4