Phenethyl Isothiocyanate Sensitizes Androgen-Independent Human Prostate Cancer Cells to Docetaxel-Induced Apoptosis In Vitro and In Vivo
- 25 February 2010
- journal article
- research article
- Published by Springer Science and Business Media LLC in Pharmaceutical Research
- Vol. 27 (4), 722-731
- https://doi.org/10.1007/s11095-010-0079-9
Abstract
Purpose The present study was undertaken to determine efficacy of phenethyl isothiocyanate (PEITC) for sensitization of androgen-independent human prostate cancer cells (AIPC) to Docetaxel-induced apoptosis using cellular and xenograft models. Methods Cell viability was determined by trypan blue dye exclusion assay. Microscopy and DNA fragmentation assay were performed to quantify apoptotic cell death in cultured cells. Protein levels were determined by immunoblotting. PC-3 prostate cancer xenograft model was utilized to determine in vivo efficacy of the PEITC and/or Docetaxel treatments. Results Pharmacologic concentrations of PEITC augmented Docetaxel-induced apoptosis in PC-3 and DU145 cells in association with suppression of Bcl-2 and XIAP protein levels and induction of Bax and Bak. The PEITC-Docetaxel combination was markedly more efficacious against PC-3 xenograft in vivo compared with PEITC or Docetaxel alone. Significantly higher counts of apoptotic bodies were also observed in tumor sections from mice treated with the PEITC-Docetaxel combination compared with PEITC or Docetaxel alone. The PEITC and/or Docetaxel-mediated changes in the levels of apoptosis regulating proteins in the tumor were generally consistent with the molecular alterations observed in cultured cells. Conclusion These results offer obligatory impetus to test PEITC-Docetaxel combination for the treatment of AIPC in a clinical setting.Keywords
This publication has 57 references indexed in Scilit:
- Signal Transducer and Activator of Transcription‐3, Inflammation, and CancerAnnals of the New York Academy of Sciences, 2009
- Atg5 Regulates Phenethyl Isothiocyanate–Induced Autophagic and Apoptotic Cell Death in Human Prostate Cancer CellsCancer Research, 2009
- Garlic Constituent Diallyl Trisulfide Prevents Development of Poorly Differentiated Prostate Cancer and Pulmonary Metastasis Multiplicity in TRAMP MiceCancer Research, 2008
- Benzyl Isothiocyanate Targets Mitochondrial Respiratory Chain to Trigger Reactive Oxygen Species-dependent Apoptosis in Human Breast Cancer CellsOnline Journal of Public Health Informatics, 2008
- The PIM1 Kinase Is a Critical Component of a Survival Pathway Activated by Docetaxel and Promotes Survival of Docetaxel-treated Prostate Cancer CellsOnline Journal of Public Health Informatics, 2008
- Cancer Statistics, 2008CA: A Cancer Journal for Clinicians, 2008
- Human inhibitor of apoptosis proteins: why XIAP is the black sheep of the familyEMBO Reports, 2006
- Suppression of NF-κB and NF-κB-regulated gene expression by sulforaphane and PEITC through IκBα, IKK pathway in human prostate cancer PC-3 cellsOncogene, 2005
- Molecular determinants of resistance to antiandrogen therapyNature Medicine, 2003
- Natural Products as Sources of New Drugs over the Period 1981−2002Journal of Natural Products, 2003