Arthropod steroid hormone (20-Hydroxyecdysone) suppresses IL-1β- induced catabolic gene expression in cartilage

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• 作者：Shiow-Yunn Sheu ; Shin-Rong Ho ; Jui-Sheng Sun…
• 关键词：20 ; Hydroxyecdysone ; IL ; 1β ; Hypoxia ; Normoxia ; Cartilage destruction ; HIF ; 2α
• 刊名：BMC Complementary and Alternative Medicine
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：15
• 期：1
• 全文大小：1,069 KB
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• 刊物主题：Complementary & Alternative Medicine; Internal Medicine; Chiropractic Medicine;
• 出版者：BioMed Central
• ISSN：1472-6882

文摘

Background In osteoarthritis (OA), the imbalance of chondrocytes-anabolic and catabolic factors can induce cartilage destruction. Interleukin-1 beta (IL-1β) is a potent pro-inflammatory cytokine that is capable of inducing chondrocytes and synovial cells to synthesize MMPs. The hypoxia-inducible factor-2alpha (HIF-2alpha, encoded by Epas1) is the catabolic transcription factor in the osteoarthritic process. The purpose of this study is to validate the effects of ecdysteroids (Ecd) on IL-1β- induced cartilage catabolism and the possible role of Ecd in treatment or prevention of early OA. Methods Chondrocytes and articular cartilage was harvested from newborn ICR mice. Ecd effect on chondrocytes viability was tested and the optimal concentration was determined by MTT assay. The effect of HIF-2α (EPAS1) in cartilage catabolism simulated by IL-1β (5 ng/ml) was evaluated by articular cartilage explants culture. The effects of Ecd on IL-1β-induced inflammatory conditions and their related catabolic genes expression were analyzed. Results Interleukin-1β (IL-1β) treatment on primary mouse articular cartilage explants enhanced their Epas1, matrix metalloproteinases (MMP-3, MMP-13) and ADAMTS-5 genes expression and down-regulated collagen type II (Col2a1) gene expression. With the pre-treatment of 10?M Ecd, the catabolic effects of IL-1β on articular cartilage were scavenged. Conclusion In conclusions, Ecd can reduce the IL-1β-induced inflammatory effect of the cartilage. Ecd may suppress IL-1β- induced cartilage catabolism via HIF-2α pathway.