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Chemopreventive effects of honokiol on UVB-induced skin cancer development

Shivani Chilampalli1, Xiaoying Zhang, Hesham Fahmy

  • 1Distinguished Professor and Head, Department of Pharmaceutical Sciences, College of Pharmacy-Box 2202 C, 116 A Intramural Building, South Dakota State University, Brookings, SD 57007, USA.

Anticancer Research
|April 16, 2010
PubMed
Abstract

Insights

Honokiol effectively prevents UVB-induced skin cancer in mice by activating apoptotic proteins. This natural compound shows promise as a chemopreventive agent for skin cancer.

Area of Science:

  • Oncology
  • Dermatology
  • Natural Products Chemistry

Background:

  • Skin cancer is a prevalent malignancy with increasing incidence.
  • Chemoprevention strategies aim to inhibit cancer development using chemical agents.
  • Honokiol, a lignan from Magnolia officinalis, exhibits chemopreventive properties.

Purpose of the Study:

  • To evaluate honokiol's chemopreventive effects against UVB-induced skin tumors in SKH-1 mice.
  • To investigate the role of apoptotic proteins in honokiol-mediated skin cancer prevention.

Main Methods:

  • SKH-1 mice were topically treated with honokiol or acetone before UVB exposure.
  • UVB radiation was administered for 30 weeks to induce skin tumors.
  • Tumor multiplicity and mouse weights were monitored weekly.

Main Results:

  • Honokiol pretreatment reduced tumor multiplicity by 45% compared to controls.
  • Mechanistic studies revealed activation of caspase-3, -8, -9, PARP, and p53.
  • These activations led to DNA fragmentation and apoptosis induction.

Conclusions:

  • Honokiol pretreatment prevents UVB-induced skin cancer development in a mouse model.
  • The mechanism involves the activation of proapoptotic proteins via intrinsic and extrinsic pathways.
  • Low-dose honokiol offers a potential chemopreventive strategy for skin cancer.

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