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Effects of alpha-santalol on proapoptotic caspases and p53 expression in UVB irradiated mouse skin

Bhanu L Arasada1, Ajay Bommareddy, Xiaoying Zhang

  • 1Department of Pharmaceutical Sciences, South Dakota State University, Brookings, SD 57007, USA.

Anticancer Research
|April 4, 2008
PubMed
Abstract

Insights

Alpha-santalol, a sandalwood component, effectively prevents skin cancer by boosting apoptosis proteins and p53. This natural agent offers a promising approach to chemoprevention against UVB-induced skin tumors.

Area of Science:

  • Natural product chemoprevention
  • Photocarcinogenesis research
  • Molecular mechanisms of cancer

Background:

  • Naturally occurring agents, including phytochemicals, show promise in cancer chemoprevention.
  • Alpha-santalol, a sandalwood oil component, demonstrates efficacy in preventing chemically and UVB-induced skin cancer in mice.
  • The precise mechanism of alpha-santalol's chemopreventive action requires further elucidation.

Purpose of the Study:

  • To investigate the impact of alpha-santalol on apoptosis proteins and p53.
  • To elucidate the mechanism of alpha-santalol's efficacy in UVB-induced skin tumor development.
  • To assess the role of alpha-santalol in modulating key proteins involved in skin cancer progression.

Main Methods:

  • Female SKH-1 mice were utilized in a 30-week study.
  • Mice were topically treated with either acetone (control) or alpha-santalol prior to UVB exposure.
  • Tumor incidence, multiplicity, and levels of apoptosis proteins (caspase-3, -8) and p53 were assessed.

Main Results:

  • Alpha-santalol pre-treatment significantly reduced skin tumor incidence and multiplicity.
  • Significant increases in apoptosis proteins, specifically caspase-3 and -8, were observed.
  • Elevated levels of the tumor suppressor protein p53 were noted in the alpha-santalol treated group.

Conclusions:

  • Alpha-santalol demonstrates significant chemopreventive effects against UVB-induced skin cancer.
  • The mechanism involves the induction of proapoptotic proteins through an extrinsic pathway.
  • Increased p53 levels contribute to the observed anti-cancer effects of alpha-santalol.

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