Prostate carcinogenesis involves transformation of zinc-accumulating normal epithelial cells to malignant cells, which do not accumulate zinc. We demonstrate that physiological levels of zinc inhibit activation of NFkappaB transcription factor, suppress expression of NF-kappaB-regulated proteins involved in angiogenesis and metastasis including VEGF, IL-8 and MMP-9 and sensitize prostate cancer cells to androgen deprivation and cytotoxic agents. Genes controlled by NF-kappaB contribute to malignant transformation, drug resistance and cancer progression to hormone-independent growth. The overall objective of the current proposal is to explore the role of zinc and zinc import and export proteins in the pathogenesis and progression of prostate malignancy and mechanisms of their regulation. We hypothesize that overexpression of zinc importers (hZIP1 and hZIP2) or reduced expression of proteins responsible for zinc export and intracellular distribution (ZnT1 through 9) has a functional impact on NF-kappaB activity, growth and viability of prostate cancer cells in vitro and in vivo.
Specific Aim 1 will examine the expression and mechanisms of regulation of zinc import and export proteins in normal and transformed prostate cells.
Specific Aim 2 will determine whether increased intracellular zinc accumulation via modulation of zinc import and export protein expression has a functional impact on NF-kappaB activity, growth and viability of prostate cancer cells.
Specific Aim 3 will determine if overexpression of human zinc uptake transporters hZIP1 and hZIP2 inhibits prostate tumor progression in vivo. Parental prostate cancer cells or cells transfected with either hZIP1 or hZIP2 will be injected orthotopically into nude mice. The effects of dietary zinc supplementation on tumor growth will be examined. The proposed studies will help to understand the role of zinc in the pathogenesis of prostate malignancy and therefore, might have important consequences for the prevention and treatment of prostate cancer. ? ?

Agency
National Institute of Health (NIH)
Institute
National Cancer Institute (NCI)
Type
Research Project (R01)
Project #
5R01CA108890-03
Application #
7230435
Study Section
Special Emphasis Panel (ZRG1-CDP (01))
Program Officer
Woodhouse, Elizabeth
Project Start
2005-06-15
Project End
2009-04-30
Budget Start
2007-05-01
Budget End
2008-04-30
Support Year
3
Fiscal Year
2007
Total Cost
$284,831
Indirect Cost
Name
Fox Chase Cancer Center
Department
Type
DUNS #
073724262
City
Philadelphia
State
PA
Country
United States
Zip Code
19111
Teper, Ervin; Makhov, Peter; Golovine, Konstantin et al. (2012) The effect of 5-aminolevulinic acid and its derivatives on protoporphyrin IX accumulation and apoptotic cell death in castrate-resistant prostate cancer cells. Urology 80:1391.e1-7
Kutikov, Alexander; Makhov, Peter; Golovine, Konstantin et al. (2011) Interleukin-6: a potential biomarker of resistance to multitargeted receptor tyrosine kinase inhibitors in castration-resistant prostate cancer. Urology 78:968.e7-11
Makhov, Peter B; Golovine, Konstantin V; Kutikov, Alexander et al. (2011) Reversal of epigenetic silencing of AP-2alpha results in increased zinc uptake in DU-145 and LNCaP prostate cancer cells. Carcinogenesis 32:1773-81
Canter, Daniel; Kutikov, Alexander; Golovine, Konstantin et al. (2011) Are all multi-targeted tyrosine kinase inhibitors created equal? An in vitro study of sunitinib and pazopanib in renal cell carcinoma cell lines. Can J Urol 18:5819-25
Makhov, Peter; Kutikov, Alexander; Golovine, Konstantin et al. (2011) Docetaxel-mediated apoptosis in myeloid progenitor TF-1 cells is mitigated by zinc: potential implication for prostate cancer therapy. Prostate 71:1413-9
Golovine, Konstantin; Makhov, Peter; Uzzo, Robert G et al. (2010) Cadmium down-regulates expression of XIAP at the post-transcriptional level in prostate cancer cells through an NF-kappaB-independent, proteasome-mediated mechanism. Mol Cancer 9:183
Makhov, Peter; Golovine, Konstantin; Uzzo, Robert G et al. (2009) Transcriptional regulation of the major zinc uptake protein hZip1 in prostate cancer cells. Gene 431:39-46
Golovine, Konstantin; Uzzo, Robert G; Makhov, Peter et al. (2008) Depletion of intracellular zinc increases expression of tumorigenic cytokines VEGF, IL-6 and IL-8 in prostate cancer cells via NF-kappaB-dependent pathway. Prostate 68:1443-9
Golovine, Konstantin; Makhov, Peter; Uzzo, Robert G et al. (2008) Overexpression of the zinc uptake transporter hZIP1 inhibits nuclear factor-kappaB and reduces the malignant potential of prostate cancer cells in vitro and in vivo. Clin Cancer Res 14:5376-84
Makhov, P; Golovine, K; Uzzo, R G et al. (2008) Zinc chelation induces rapid depletion of the X-linked inhibitor of apoptosis and sensitizes prostate cancer cells to TRAIL-mediated apoptosis. Cell Death Differ 15:1745-51

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