Pharmaceutical Research

, Volume 25, Issue 9, pp 2181–2189

Murine Prostate Cancer Inhibition by Dietary Phytochemicals—Curcumin and Phenyethylisothiocyanate

Authors

  • Avantika Barve
    • Graduate Program in Pharmaceutical Sciences, Ernest Mario School of PharmacyRutgers, The State University of New Jersey
  • Tin Oo Khor
    • Department of Pharmaceutics, Ernest Mario School of PharmacyRutgers, The State University of New Jersey
  • Xingpei Hao
    • Department for Chemical Biology, Ernest Mario School of PharmacyRutgers, The State University of New Jersey
    • Center for Cancer Prevention Research, Ernest Mario School of PharmacyRutgers, The State University of New Jersey
  • Young-Sam Keum
    • Graduate Program in Pharmaceutical Sciences, Ernest Mario School of PharmacyRutgers, The State University of New Jersey
  • Chung S. Yang
    • Department for Chemical Biology, Ernest Mario School of PharmacyRutgers, The State University of New Jersey
    • Center for Cancer Prevention Research, Ernest Mario School of PharmacyRutgers, The State University of New Jersey
  • Bandaru Reddy
    • Department for Chemical Biology, Ernest Mario School of PharmacyRutgers, The State University of New Jersey
    • Center for Cancer Prevention Research, Ernest Mario School of PharmacyRutgers, The State University of New Jersey
    • Department of Pharmaceutics, Ernest Mario School of PharmacyRutgers, The State University of New Jersey
    • Center for Cancer Prevention Research, Ernest Mario School of PharmacyRutgers, The State University of New Jersey
Research Paper

DOI: 10.1007/s11095-008-9574-7

Cite this article as:
Barve, A., Khor, T.O., Hao, X. et al. Pharm Res (2008) 25: 2181. doi:10.1007/s11095-008-9574-7

ABSTRACT

Purpose

Prior studies from our laboratory have demonstrated the efficacy of a combined treatment of low doses of dietary agents curcumin and phenylethylisothiocyanate in effectively suppressing prostate cancer in vitro in human prostate cancer PC3 cells as well as in vivo in immunodeficient mice implanted with PC3 cells. Hence, this study was undertaken to examine the potential chemopreventive properties of the two agents against transgenic adenocarcinoma of the mouse prostate.

Materials and Methods

The efficacy of AIN-76A diet supplemented with 2% curcumin or 0.05% PEITC or a combination of 1% curcumin and 0.025% PEITC for periods of 10 and 16 weeks was tested against adenocarcinoma of the mouse prostate. Immunohistochemistry and Western blot analysis were used to examine the expression of proliferation and apoptotic biomarkers. All statistical tests were two-sided.

Results

Supplementing AIN-76A diet with dietary phytochemicals curcumin or PEITC either alone or in combination, significantly decreased incidence of prostate tumor formation (P = 0.0064). Immunohistochemistry revealed a significant inhibition of high-grade PIN (P = 0.0006, 0.000069, 0.00029 for a treatment period of 10 weeks and P = 0.02582, 0.022179, 0.0317 for a treatment period of 16 weeks) along with decreased proliferation and increased apoptotic index in the curcumin, PEITC or curcumin and PEITC treated animals, respectively. Furthermore, Western blot analysis revealed that downregulation of the Akt signaling pathway may in part play a role in decreasing cell proliferation ultimately retarding prostate tumor formation.

Conclusion

Our data lucidly evidence the chemopreventive merits of dietary phytochemicals curcumin and PEITC in suppressing prostate adenocarcinoma.

KEY WORDS

cancer chemopreventioncurcuminPEITCprostate cancerTRAMP

Copyright information

© Springer Science+Business Media, LLC 2008