Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 122, Issue -, Pages 882-892Publisher
ELSEVIER
DOI: 10.1016/j.ijbiomac.2018.11.015
Keywords
Anoectochilus roxburghii polysaccharides; Collagen-induced arthritis; Rheumatoid arthritis
Funding
- Program of Shanghai Health System Subject Chief Scientist [2017BR004]
- Shanghai Rising-star Program [18QA1405200]
- National Science and Technology Major Projects for New Drugs innovation and Development [2018ZX09J18110-006]
- Innovation Plan of Science and Technology Commission of Shanghai Municipality [16401901500]
- Project of National Natural Science Foundation of China [81603230, 81773846]
- Program for Distinguished Young Research Talents in Fujian Province University
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Anoectochilus roxburghii, a famous Chinese herbal medicine, has been commonly used for the treatment of liver disease, diabetes, and rheumatoid arthritis. Our study aimed to investigate the anti-rheumatoid arthritis effects of A. roxburghii polysaccharides (ARP), using the rat's model of type II collagen-induced arthritis (CIA). ARP was prepared by alcohol sedimentation and structurally characterized based on combined chemical, chromatographic and spectroscopic methods. High Performance Size Exclusion Chromatography-Multiangle Laser Light Scattering-Refrative Index (HPSEC-MALLS-RI) analysis revealed that ARP includes two peaks, and the weight-average molecular weight (Mw) of the principal one was estimated as 5.90 kDa with a relative content of 98.2%. Pharmacological results exhibited that ARP significantly decreased the arthritis index and ameliorated the inflammatory cell infiltration and the synovial tissue destruction in CIA rats. Additionally, ARP possessed significant NO production inhibitory effects and antioxidant activity. Further anti-inflammatory mechanism investigations indicated that ARP significantly inhibited the activation of nuclear factor kappa B (NF-kappa B) pathway by suppressing the phosphorylation of I kappa B and p65, which subsequently down-regulated the mRNA expressions of IL-1 beta and IL-6 in LPS-stimulated RAW 264.7 cells. These findings suggested that ARP has great potential in the development of functional foods and dietary supplements for the treatment of rheumatoid arthritis. (C) 2018 Published by Elsevier B.V.
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