Abstract
Although bladder cancer represents a serious health problem worldwide, relevant mouse models for investigating disease progression or therapeutic targets have been lacking. We show that combined deletion of p53 and Pten in bladder epithelium leads to invasive cancer in a novel mouse model. Inactivation of p53 and PTEN promotes tumorigenesis in human bladder cells and is correlated with poor survival in human tumors. Furthermore, the synergistic effects of p53 and Pten deletion are mediated by deregulation of mammalian target of rapamycin (mTOR) signaling, consistent with the ability of rapamycin to block bladder tumorigenesis in preclinical studies. Our integrated analyses of mouse and human bladder cancer provide a rationale for investigating mTOR inhibition for treatment of patients with invasive disease.
Publication types
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Research Support, N.I.H., Extramural
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Research Support, Non-U.S. Gov't
MeSH terms
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Animals
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Carcinoma, Transitional Cell / genetics
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Carcinoma, Transitional Cell / metabolism
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Carcinoma, Transitional Cell / pathology*
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Cell Transformation, Neoplastic*
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Disease Models, Animal*
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Humans
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Lymphatic Metastasis
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Male
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Mice
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Mice, Nude
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Mice, Transgenic
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Neoplasm Invasiveness
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PTEN Phosphohydrolase / genetics
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PTEN Phosphohydrolase / metabolism*
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Protein Kinases / physiology
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Rats
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Signal Transduction
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TOR Serine-Threonine Kinases
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Tumor Suppressor Protein p53 / genetics
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Tumor Suppressor Protein p53 / metabolism*
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Urinary Bladder Neoplasms / genetics
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Urinary Bladder Neoplasms / metabolism
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Urinary Bladder Neoplasms / pathology*
Substances
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Tumor Suppressor Protein p53
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Protein Kinases
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MTOR protein, human
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mTOR protein, mouse
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TOR Serine-Threonine Kinases
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PTEN Phosphohydrolase
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PTEN protein, human
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Pten protein, mouse