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Effect of deguelin on UVB-induced skin carcinogenesis

J J Gills1, J Kosmeder, R C Moon

  • 1Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, Chicago, IL 60612, USA.

Journal of Chemotherapy (Florence, Italy)
|July 27, 2005
PubMed

Insights

Deguelin, a plant compound, effectively prevented UVB-induced skin tumors in mice. This study reveals deguelin activates AMP-activated kinase (AMPK), a novel mechanism for cancer chemoprevention.

Area of Science:

  • Oncology
  • Dermatology
  • Molecular Biology

Background:

  • Nonmelanoma skin cancer affects over one million Americans annually, necessitating improved preventive strategies.
  • Deguelin, a rotenoid from plants, exhibits known cancer chemopreventive properties.
  • Understanding deguelin's mechanism against UVB-induced skin cancer is crucial.

Purpose of the Study:

  • To evaluate deguelin's efficacy in preventing UVB-induced skin carcinogenesis.
  • To investigate the molecular mechanisms underlying deguelin's chemopreventive effects.
  • To explore the role of AMP-activated kinase (AMPK) in deguelin's action.

Main Methods:

  • Utilized the SKh-1 mouse model for UVB-induced skin carcinogenesis studies.
  • Administered deguelin topically to assess its impact on tumor development.
  • Conducted mechanistic studies to analyze molecular signaling pathways, including AP-1 DNA binding, mRNA induction, and protein phosphorylation.

Main Results:

  • Topical deguelin significantly reduced the multiplicity of UVB-induced skin tumors.
  • Mechanistic studies did not support previously hypothesized pathways for deguelin's action.
  • Deguelin was found to activate 5' AMP-activated kinase (AMPK), a cellular energy sensor.

Conclusions:

  • Deguelin demonstrates potential as a chemopreventive agent against human skin cancer.
  • The activation of AMPK by deguelin represents a novel mechanism for cancer chemoprevention.
  • This finding suggests a potential role for AMPK in the broader field of cancer chemoprevention.

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