期刊
PHARMACOLOGICAL RESEARCH
卷 113, 期 -, 页码 458-467出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.phrs.2016.09.016
关键词
Synovial fibroblast; Chitosan oligosaccharide; AMPK; NF-kappa B; Osteoarthritis
资金
- Mahidol University through the Royal Golden Jubilee Ph.D. Program [PHD/0369/2552]
- Mahidol University [BRG5980008]
- National Research Council of Thailand (NRCT)
- Faculty of Science, Mahidol University
- Office of the Higher Education Commission
- Mahidol University under the National Research Universities Initiative
- Thailand Research Fund
Synovial inflammation plays an important role in the early pathogenesis of osteoarthritis (OA). Chitosan oligosaccharide (COS) has been shown to activate AMPK and suppress inflammatory responses in intestinal epithelial cells. This study aimed to investigate the effect of COS on AMPK activation and synovial inflammation using both primary cultures of synoviocytes and a rabbit model of anterior cruciate ligament (ACL) transection-induced OA. COS induced AMPK activation in both rabbit and human synoviocytes. The mechanism of COS-induced AMPK activation involves an increase in the ADP/ATP ratio but not calcium/calmodulin-dependent protein kinase kinase beta (CaMKK13). Interestingly, COS suppressed the TNFa-induced iNOS and COX-2 expression via an AMPK-dependent mechanism in both rabbit and human synoviocytes. Importantly, oral administration of COS (10 mg/kg/day) induced AMPK activation and alleviated signs of inflammation including COX-2 expression in the synovium of a rabbit ACL transection model. Taken together, our results indicate that COS suppresses synovial inflammation in vitro and in vivo via AMPK activation. COS may be useful in the prevention of OA. (C) 2016 Elsevier Ltd. All rights reserved.
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