Abstract
Objective:
Investigating whether extracellular factors are possible actors in tumoral progression in bladder carcinoma.
Methods:
RT112/G2 bladder tumour cells were grown in presence of TGFbeta and analysed by immunological and cDNA microarray techniques.
Results:
TGFbeta inhibited cell proliferation, reduced TNFalpha- and IFNgamma-induced apoptosis by decreasing TNFalpha-RI and IFNgamma-R antigen expression. It also inhibited cleaved caspase 8 and 9 expression, decreased E-cadherin, and increased BclxL and cyclooxygenase-2 expression. The cDNA microarray approach showed that TGFbeta up-regulated the expression of genes with defined roles in tumoral progression sometimes associated with poor outcome in bladder cancer.
Conclusion:
These results suggest that a part of the bladder tumoral progression process may be related to the action of exogenous TGFbeta confirming the possible role for the microenvironment.
MeSH terms
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Apoptosis / physiology
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Cadherins / genetics
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Cadherins / metabolism
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Caspase 8
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Caspase 9
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Caspases / metabolism
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Cell Differentiation
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Cell Line, Tumor
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Cell Proliferation
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Disease Progression
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Gene Expression Regulation, Neoplastic
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Humans
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Interferon gamma Receptor
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Interferon-gamma / metabolism
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Molecular Sequence Data
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Oligonucleotide Array Sequence Analysis
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Protein Serine-Threonine Kinases
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Proto-Oncogene Proteins c-akt / genetics
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Proto-Oncogene Proteins c-akt / metabolism
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Receptor, Transforming Growth Factor-beta Type II
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Receptors, Interferon / genetics
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Receptors, Interferon / metabolism
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Receptors, Transforming Growth Factor beta / genetics
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Receptors, Transforming Growth Factor beta / metabolism
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Receptors, Tumor Necrosis Factor, Type I / genetics
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Receptors, Tumor Necrosis Factor, Type I / metabolism
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Recombinant Proteins / genetics
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Recombinant Proteins / metabolism
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Transforming Growth Factor beta / genetics
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Transforming Growth Factor beta / 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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Cadherins
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Receptors, Interferon
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Receptors, Transforming Growth Factor beta
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Receptors, Tumor Necrosis Factor, Type I
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Recombinant Proteins
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Transforming Growth Factor beta
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Interferon-gamma
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Protein Serine-Threonine Kinases
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Proto-Oncogene Proteins c-akt
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Receptor, Transforming Growth Factor-beta Type II
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CASP8 protein, human
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CASP9 protein, human
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Caspase 8
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Caspase 9
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Caspases