Ginsenoside metabolite compound K promotes recovery of dextran sulfate sodium-induced colitis and inhibits inflammatory responses by suppressing NF-κB activation

PLoS One. 2014 Feb 4;9(2):e87810. doi: 10.1371/journal.pone.0087810. eCollection 2014.

Abstract

Phytogenic compounds with anti-oxidant and anti-inflammatory properties, such as ginsenoside metabolite compound K (CK) or berberine (BBR), are currently discussed as promising complementary agents in the prevention and treatment of cancer and inflammation. The latest study showed that ginsenoside Rb1 and its metabolites could inhibit TNBS-induced colitis injury. However, the functional mechanisms of anti-inflammation effects of ginsenoside, particularly its metabolite CK are still not clear. Here, using dextran sulfate sodium (DSS)-induced colitis in mice, clinical parameters, intestinal integrity, pro-inflammatory cytokines production, and signaling pathways in colonic tissues were determined. In mild and sever colitis mice, CK and BBR (as a positive agent) alleviated colitis histopathology injury, ameliorated myeloperoxidase (MPO) activity, reduced pro-inflammatory cytokines production, such as, IL-6, IL-1β, TNF-α, and increased anti-inflammatory cytokine IL-10 production in both mice colon tissues and blood. Nevertheless, the results revealed that CK and BBR inhibited NF-κB p65 nuclear translocation, downregulated p-IκBα and upregulated IκBα, indicating that CK, as well as BBR, suppressed the activation of the NF-κB pathway in the progression of colitis with immunofluorescence, immunohistochemical and western blotting analysis. Furthermore, CK inhibited pro-inflammatory cytokines production in LPS-activated macrophages via down-regulation of NF-κB signaling pathway. Taken together, our results not only reveal that CK promotes the recovery of the progression of colitis and inhibits the inflammatory responses by suppressing NF-κB activation, but also suggest that CK downregulates intestinal inflammation through regulating the activation of macrophages and pro-inflammatory cytokines production.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Anti-Inflammatory Agents, Non-Steroidal / administration & dosage
  • Anti-Inflammatory Agents, Non-Steroidal / pharmacology
  • Berberine / administration & dosage
  • Berberine / pharmacology*
  • Cell Line
  • Colitis / chemically induced
  • Colitis / drug therapy
  • Colitis / immunology*
  • Colitis / metabolism*
  • Colitis / pathology
  • Colon / immunology
  • Colon / metabolism
  • Colon / pathology
  • Cytokines / biosynthesis
  • Dextran Sulfate / adverse effects
  • Disease Models, Animal
  • Inflammation Mediators / metabolism
  • Macrophages / drug effects
  • Macrophages / immunology
  • Macrophages / metabolism
  • Mice
  • NF-kappa B / metabolism*
  • Peroxidase / blood
  • Peroxidase / metabolism
  • Signal Transduction / drug effects

Substances

  • Anti-Inflammatory Agents, Non-Steroidal
  • Cytokines
  • Inflammation Mediators
  • NF-kappa B
  • Berberine
  • Dextran Sulfate
  • Peroxidase

Grants and funding

This work was supported by the grants from the National Natural Science Foundation of China (31071187, 81172284, 81272721), the Fundamental Research Funds for the Central Universities (2010121102), Xiamen Municipal Science and Technology Innovation Fund Project (3502Z20114018), and the Program for New Century Excellent Talents in Fujian Province University. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.