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Korean Society for Biochemistry and Molecular Biology (생화학분자생물학회)
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Avenanthramide C as a novel candidate to alleviate osteoarthritic pathogenesis

  • Tran, Thanh-Tam (Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University) ;
  • Song, Won-Hyun (Hard-tissue Biointerface Research Center, School of Dentistry, Chonnam National University) ;
  • Lee, Gyuseok (Hard-tissue Biointerface Research Center, School of Dentistry, Chonnam National University) ;
  • Kim, Hyung Seok (Department of Forensic Science, Chonnam National University Medical School) ;
  • Park, Daeho (School of Life Sciences, Gwangju Institute of Science and Technology) ;
  • Huh, Yun Hyun (School of Life Sciences, Gwangju Institute of Science and Technology) ;
  • Ryu, Je-Hwang (Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University)
  • Received : 2021.08.05
  • Accepted : 2021.08.26
  • Published : 2021.10.31
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Abstract

Osteoarthritis (OA) is a degenerative disorder that can result in the loss of articular cartilage. No effective treatment against OA is currently available. Thus, interest in natural health products to relieve OA symptoms is increasing. However, their qualities such as efficacy, toxicity, and mechanism are poorly understood. In this study, we determined the efficacy of avenanthramide (Avn)-C extracted from oats as a promising candidate to prevent OA progression and its mechanism of action to prevent the expression of matrix-metalloproteinases (MMPs) in OA pathogenesis. Interleukin-1 beta (IL-1β), a proinflammatory cytokine as a main causing factor of cartilage destruction, was used to induce OA-like condition of chondrocytes in vitro. Avn-C restrained IL-1β-mediated expression and activity of MMPs, such as MMP-3, -12, and -13 in mouse articular chondrocytes. Moreover, Avn-C alleviated cartilage destruction in experimental OA mouse model induced by destabilization of the medial meniscus (DMM) surgery. However, Avn-C did not affect the expression of inflammatory mediators (Ptgs2 and Nos) or anabolic factors (Col2a1, Aggrecan, and Sox9), although expression levels of these genes were upregulated or downregulated by IL-1β, respectively. The inhibition of MMP expression by Avn-C in articular chondrocytes was mediated by p38 kinase and c-Jun N-terminal kinase (JNK) signaling, but not by ERK or NF-κB. Interestingly, Avn-C added with SB203580 and SP600125 as specific inhibitors of p38 kinase and JNK, respectively, enhanced its inhibitory effect on the expression of MMPs in IL-1β treated chondrocytes. Taken together, these results suggest that Avn-C is an effective candidate to prevent OA progression and a natural health product to relieve OA pathogenesis.

Keywords

Acknowledgement

This work was supported by grants (NRF-2019R1A5A2027521 and 2021R1A2C300572711) of the National Research Foundation of Korea (NRF) funded by the Korea government (MSIT), the Korea Healthcare Technology R&D Project of the Korea Health Industry Development Institute (HR14C0008), and Chonnam National University Hospital Biomedical Research Institute (BCRI18012).

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