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Lignans inhibit cell growth via regulation of Wnt/beta-catenin signaling

Ji-Hye Yoo1, Hee Ju Lee, Kyungsu Kang

  • 1Natural Products Research Center, Korea Institute of Science and Technology, Gangneung, Gangwon-do 210-340, Republic of Korea.

Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association
|June 1, 2010
PubMed

Insights

Arctigenin, a lignan from Saussurea salicifolia, effectively inhibits colon cancer cell growth by blocking the Wnt/beta-catenin signaling pathway. This compound reduces beta-catenin levels and induces apoptosis, offering potential for colon cancer prevention.

Area of Science:

  • Oncology
  • Molecular Biology
  • Pharmacology

Background:

  • Aberrant Wnt/beta-catenin signaling is a key driver of colon cancer development.
  • Targeting this pathway is a promising strategy for colon cancer prevention and treatment.

Purpose of the Study:

  • To investigate the potential of lignans from Saussurea salicifolia, specifically arctiin, matairesinol, and arctigenin, to inhibit Wnt/beta-catenin signaling in human colon cancer cells.
  • To determine which lignan exhibits the most significant inhibitory effect on this pathway.

Main Methods:

  • Treatment of SW480 human colon cancer cells with arctiin, matairesinol, and arctigenin.
  • Assessment of cell growth inhibition.
  • Measurement of transcriptional activity using a TCF binding element (TBE) reporter construct.
  • Analysis of beta-catenin levels, phosphorylation, and degradation.
  • Evaluation of downstream gene expression (CCND1, survivin, CTNNB1) and apoptosis induction.

Main Results:

  • All three lignans inhibited SW480 cell growth.
  • Transcriptional activity of the TBE reporter construct was reduced by all lignans.
  • Arctigenin demonstrated the most significant inhibition of Wnt/beta-catenin signaling.
  • Arctigenin reduced beta-catenin levels through phosphorylation-induced degradation.
  • Arctigenin decreased expression of Wnt/beta-catenin target genes and induced apoptosis.

Conclusions:

  • Arctigenin potently inhibits human colon cancer cell growth by targeting the Wnt/beta-catenin signaling pathway.
  • The methoxyl group in arctigenin may contribute to its potent inhibitory activity.
  • Arctigenin represents a potential therapeutic agent for colon cancer prevention and treatment.

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