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Inhibition of nuclear factor-kappaB activation by 2',8''-biapigenin

Eun-Rhan Woo1, Yuba Raj Pokharel, Jin Won Yang

  • 1College of Pharmacy, Chosun University, Gwangju, South Korea.

Biological & Pharmaceutical Bulletin
|May 3, 2006
PubMed

Insights

2

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Pharmacology

Background:

  • Inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) are key enzymes in inflammation and cancer pathogenesis.
  • Overproduction of nitric oxide (NO) and prostaglandins by iNOS and COX-2 contributes to human cancer development.
  • Selaginella tamariscina extracts are traditionally used in oriental medicine and show anti-inflammatory and anti-cancer properties.

Purpose of the Study:

  • To investigate the effects of 2',8''-biapigenin, isolated from S. tamariscina, on iNOS and COX-2 expression.
  • To determine the molecular mechanisms by which 2',8''-biapigenin modulates inflammatory gene expression.
  • To explore the potential of S. tamariscina and its compounds in cancer chemoprevention and inflammatory disease treatment.

Main Methods:

  • Isolation of 2',8''-biapigenin from Selaginella tamariscina.
  • Stimulation of Raw264.7 macrophages with lipopolysaccharide (LPS).
  • Assessment of iNOS and COX-2 gene expression and nuclear factor-kappaB (NF-κB) pathway activation.

Main Results:

  • 2',8''-biapigenin significantly inhibited the gene transactivation of iNOS and COX-2.
  • The compound effectively blocked the nuclear translocation of the p65 subunit of NF-κB.
  • This inactivation of NF-κB by 2',8''-biapigenin suppressed LPS-induced inflammatory responses.

Conclusions:

  • 2',8''-biapigenin from S. tamariscina effectively inhibits iNOS and COX-2 expression by blocking NF-κB activation.
  • This compound demonstrates potential as a therapeutic agent for inflammatory diseases.
  • S. tamariscina extracts and 2',8''-biapigenin may serve as valuable agents for cancer chemoprevention.

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