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Chemopreventive activity of lantadenes on two-stage carcinogenesis model in Swiss albino mice: AP-1 (c-jun), NFκB (p65) and P53 expression by ELISA and immunohistochemical localization

  • Jagdeep Kaur
  • Manu Sharma
  • P. D. Sharma
  • M. P. Bansal
Article

Abstract

Lantadenes are pentacyclic triterpenoids isolated from leaves of Lantana camara L. and have antitumor activity. Lantadene A (LA) and methyl ester of LA (LAM) were earlier studied in the author’s lab for their chemopreventive effect on 7,12-dimethylbenz(a)anthracene (DMBA) followed by 12–O-tetradecanoylphorbol-13-acetate (TPA) induced squamous cell carcinoma incidence in Swiss albino mice. The present study was specially designed to initiate the involvement of the molecular targets in chemopreventive activity of these compounds. Skin lesions were induced by twice-weekly topical application of DMBA (100 nmol/100 μl of acetone) for 2 weeks followed by TPA (1.7 nmol/100 μl of acetone) on depilated back of mice for 20 weeks. LA and LAM were administered orally at a dose of 50 mg/kg body weight twice weekly, 1 week before DMBA application and continued for 20 weeks thereafter. A significant decrease in the incidence of number of lesions in mice was obtained in LA/LAM treated groups as compared to DMBA/TPA alone. Significant increase in the protein levels of c-jun, p65, and p53 by ELISA were observed in DMBA/TPA treated mice tumors whereas less expression was observed in LA and LAM treated tumors. Further immunohistochemical localization of transcription factors was studied which also showed less localization of c-jun, p65, and p53 in LA and LAM treated tumors as compared to localization in DMBA/TPA treated tumors. It can be inferred that LA and LAM chemopreventive activity may be linked to the deregulation of above molecular targets which warrants further studies in that direction.

Keywords

Transcription factors Lantadenes Squamous cell carcinoma 

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Copyright information

© Springer Science+Business Media, LLC. 2008

Authors and Affiliations

  • Jagdeep Kaur
    • 1
  • Manu Sharma
    • 2
  • P. D. Sharma
    • 2
  • M. P. Bansal
    • 1
  1. 1.Department of BiophysicsPanjab UniversityChandigarhIndia
  2. 2.University Institute of Pharmaceutical SciencesPanjab UniversityChandigarhIndia

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