Andrographolide Benefits Rheumatoid Arthritis via Inhibiting MAPK Pathways
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Abstract
Andrographolide (AD) is the main compound distributed in medicinal herb Andrographis paniculata and exhibits anti-inflammatory activity. AD has been used for the treatment of multiple inflammatory diseases. However, the therapeutic value of AD on human rheumatoid arthritis (RA) remains unclear. In this study, we investigated the effects of AD on collagen-induced arthritis (CIA) and human RA synovial fibroblasts (RA-SFs). CIA mice were treated with AD (dissolved in 0.5% CMC-Na, 100 mg/kg per day) or vehicle (0.5% CMC-Na) daily by oral gavage for 2 weeks. The arthritis severity and joint destruction were assessed. Serum anti-collagen II antibody (anti-CII Abs) and cytokines were determined by ELISA. TNFα-stimulated human RA-SFs were treated with varying doses of AD for in vitro investigation. Results showed that AD significantly attenuated the arthritis severity and joint damage. AD treatment significantly reduced the production of serum anti-CII, TNFα, IL-1β, and IL-6. In vitro, AD decreased the secretion of IL-1β and IL-6 from TNFα-stimulated RA-SFs in a dose-dependent manner. AD treatment reduced the TNFα-induced phosphorylation of p38 MAPK and ERK1/2 in a dose-dependent manner. Thus, our findings suggest that AD confers protective effects on autoimmune arthritis through inhibiting MAPK pathways.
KEY WORDS
andrographolide collagen-induced arthritis rheumatoid arthritis synovial fibroblastsNotes
Compliance with Ethical Standards
The study was approved by the Animal Care and Use Committee Women and Children’s Hospital of Linyi City. Synovial tissue samples were obtained from 20 patients with RA during orthopedic surgery after written informed consent. This study was approved by the Institutional Review Board of Women and Children’s Hospital of Linyi City.
Conflict of Interest
The authors declare that they have no conflict of interest.
Supplementary material
References
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