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Eur J Pharmacol. 2015 Jun 5;756:38-42. doi: 10.1016/j.ejphar.2015.03.012. Epub 2015 Mar 20.

Taraxasterol inhibits IL-1β-induced inflammatory response in human osteoarthritic chondrocytes.

Author information

1
Children׳s Hospital of Harbin, Harbin, Heilongjiang Province 150010, People׳s Republic of China.
2
Department of Orthopedic Surgery, the Second Hospital of Harbin Medical University, Harbin, Heilongjiang Province 150086, People׳s Republic of China.
3
Department of Orthopedic Surgery, the Second Hospital of Harbin Medical University, Harbin, Heilongjiang Province 150086, People׳s Republic of China. Electronic address: Liujianyu6@hotmail.com.

Abstract

Osteoarthritis (OA), a chronic degenerative joint disease, is a leading cause of disability among elderly patients. Taraxasterol, a pentacyclic-triterpene isolated from Taraxacum officinale, has been shown to have anti-inflammatory effects. However, the protective effect of taraxasterol on OA remains unclear. In order to provide a scientific basis for the applicability of taraxasterol in OA, the anti-inflammatory effects of taraxasterol on IL-1β-stimulated osteoarthritic chondrocytes were investigated. Chondrocytes were pretreated with taraxasterol 1h before IL-1β treatment. The productions of MMP-1, MMP3, MMP13, PGE2 and NO were measured by ELISA and Griess reaction. The expression of COX-2, iNOS, and NF-κB was detected by western blot analysis. Our results demonstrated that taraxasterol dose-dependently suppressed MMP-1, MMP3, MMP13, PGE2 and NO production induced by IL-1β. The expression of COX-2 and iNOS was also inhibited by taraxasterol. Western blot analysis showed that taraxasterol suppressed IL-1β-induced NF-κB activation in a dose-dependent manner. Taken together, we found that taraxasterol protected human chondrocytes by inhibiting MMPs, NO and PGE2 production. Taraxasterol may be a useful agent for prevention and treatment of OA.

KEYWORDS:

IL-1β; NF-κB; Osteoarthritis chondrocyte; Taraxasterol

PMID:
25797286
DOI:
10.1016/j.ejphar.2015.03.012
[Indexed for MEDLINE]

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