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Abstract Title:

An acidic polysaccharide of Panax ginseng ameliorates experimental autoimmune encephalomyelitis and induces regulatory T cells.

Abstract Source:

Immunol Lett. 2011 Aug 30;138(2):169-78. Epub 2011 Apr 15. PMID: 21524666

Abstract Author(s):

Insun Hwang, Ginnae Ahn, Eunjin Park, Danbee Ha, Jie-Young Song, Youngheun Jee

Article Affiliation:

College of Veterinary Medicine and Applied Radiological Institute, Jeju National University, Jeju, South Korea.

Abstract:

An acidic polysaccharide of Panax ginseng (APG), so called ginsan, is a purified polysaccharide. APG has multiple immunomodulatory effects of stimulating natural killer (NK) and T cells and producing a variety of cytokines that proved to diminish the proinflammatory response, and protect from septic lethality. To determine APG's role in the autoimmune demyelinating disease, we tested whether APG can regulate inflammatory and encephalitogenic response in experimental autoimmune encephalomyelitis (EAE), an animal model of human multiple sclerosis (MS). Here, we demonstrate the therapeutic efficacy of the APG which induces the suppression of an encephalitogenic response during EAE. APG significantly ameliorates the progression of EAE by inhibiting the proliferation of autoreactive T cells and the production of inflammatory cytokines such as IFN-γ, IL-1β and IL-17. More importantly, APG promotes the generation of immunosuppressive regulatory T cells (Tregs) through the activation of transcription factor, Foxp3. Furthermore, the depletion of CD25(+) cells from APG-treated EAE mice abrogates the beneficial effects of EAE. The capacity of APG to induce clinically beneficial effects furthers our understanding of the basis for its therapeutic immunosuppression of EAE and, possibly, MS. Thus, our results suggest that APG may serve as an effective therapy for MS and other autoimmune diseases.

Study Type : Animal Study

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