YEARS

1997-2001

AUTHORS

Steven K Clinton

TITLE

DIETARY TOMATO PRODUCTS AND EXPERIMENTAL PROSTATE CANCER

ABSTRACT

Background. Prostate cancer has become the most frequently diagnosed malignancy in American men, particularly the African American population which experiences the highest rates in the world. It is probable that a number of dietary factors modulate risk. The Health Professionals Follow-Up Study has detected a significant reduction in prostate cancer risk with the consumption of tomato products. Several additional lines of preliminary evidence derived by our group support the hypothesis that tomato products may reduce risk. The biologically active substances in tomatoes that may influence the prostate are unknown. One possibility is the carotenoid lycopene. Higher serum concentrations of lycopene are associated with reduced prostrate cancer risk in the Physicians Health Study. Lycopene is the most common carotenoid in the human prostate and has antiproliferative effects on prostate cells in vitro. Hypothesis. We hypothesize that diets supplemented with tomato products or lycopene inhibit de novo prostate carcinogenesis, prostate tumor growth rates, and metastases in well characterized rodent models. Experimental Approach. The effects of diets supplemented with tomato powder, tomato lipophilic extract, or lycopene on prostate carcinogenesis will be evaluated in five models. (1). NMU/androgen-induced rat prostate carcinogenesis. (2). The growth rate of the well differentiated, slow growing and androgen sensitive Dunning R3327H prostate adenocarcinoma in rats. (3). Metastatic spread of the MatLyLu poorly differentiated and androgen independent prostate adenocarcinoma in rats. (4). The growth rate of the human poorly differentiated, androgen resistant, and p53 mutant PC-3 prostate adenocarcinoma in SCID mice. (5). The growth rate of the human, poorly differentiated, hormone dependent, and p53 normal LNCaP human prostate adenocarcinoma in SCID mice. Relevance. These studies will provide critical data for the understanding of prostate cancer etiology and prevention as well as the potential development of a new chemopreventive agent.

FUNDED PUBLICATIONS

  • Increased phospho-AKT is associated with loss of the androgen receptor during the progression of N-methyl-N-nitrosourea-induced prostate carcinogenesis in rats.
  • Interrelationships among angiogenesis, proliferation, and apoptosis in the tumor microenvironment during N-methyl-N-nitrosourea androgen-induced prostate carcinogenesis in rats.
  • beta-Carotene stability and uptake by prostate cancer cells are dependent on delivery vehicle.
  • Changes in plasma and oral mucosal lycopene isomer concentrations in healthy adults consuming standard servings of processed tomato products.
  • Suppression of VEGF-mediated autocrine and paracrine interactions between prostate cancer cells and vascular endothelial cells by soy isoflavones.
  • Hyperlipidemia and atherosclerotic lesion development in LDL receptor-deficient mice fed defined semipurified diets with and without cholate.
  • Energy balance alters dunning R3327-H prostate tumor architecture, androgen receptor expression, and nuclear morphometry in rats.
  • Energy intake and prostate tumor growth, angiogenesis, and vascular endothelial growth factor expression.
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    24 TRIPLES      15 PREDICATES      25 URIs      7 LITERALS

    Subject Predicate Object
    1 grants:ee53e77b0acf615dafb39b58b17b9ea7 sg:abstract Background. Prostate cancer has become the most frequently diagnosed malignancy in American men, particularly the African American population which experiences the highest rates in the world. It is probable that a number of dietary factors modulate risk. The Health Professionals Follow-Up Study has detected a significant reduction in prostate cancer risk with the consumption of tomato products. Several additional lines of preliminary evidence derived by our group support the hypothesis that tomato products may reduce risk. The biologically active substances in tomatoes that may influence the prostate are unknown. One possibility is the carotenoid lycopene. Higher serum concentrations of lycopene are associated with reduced prostrate cancer risk in the Physicians Health Study. Lycopene is the most common carotenoid in the human prostate and has antiproliferative effects on prostate cells in vitro. Hypothesis. We hypothesize that diets supplemented with tomato products or lycopene inhibit de novo prostate carcinogenesis, prostate tumor growth rates, and metastases in well characterized rodent models. Experimental Approach. The effects of diets supplemented with tomato powder, tomato lipophilic extract, or lycopene on prostate carcinogenesis will be evaluated in five models. (1). NMU/androgen-induced rat prostate carcinogenesis. (2). The growth rate of the well differentiated, slow growing and androgen sensitive Dunning R3327H prostate adenocarcinoma in rats. (3). Metastatic spread of the MatLyLu poorly differentiated and androgen independent prostate adenocarcinoma in rats. (4). The growth rate of the human poorly differentiated, androgen resistant, and p53 mutant PC-3 prostate adenocarcinoma in SCID mice. (5). The growth rate of the human, poorly differentiated, hormone dependent, and p53 normal LNCaP human prostate adenocarcinoma in SCID mice. Relevance. These studies will provide critical data for the understanding of prostate cancer etiology and prevention as well as the potential development of a new chemopreventive agent.
    2 sg:endYear 2001
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    17 sg:language English
    18 sg:license http://scigraph.springernature.com/explorer/license/
    19 sg:scigraphId ee53e77b0acf615dafb39b58b17b9ea7
    20 sg:startYear 1997
    21 sg:title DIETARY TOMATO PRODUCTS AND EXPERIMENTAL PROSTATE CANCER
    22 sg:webpage http://projectreporter.nih.gov/project_info_description.cfm?aid=2895738
    23 rdf:type sg:Grant
    24 rdfs:label Grant: DIETARY TOMATO PRODUCTS AND EXPERIMENTAL PROSTATE CANCER
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