Abstract
Proliferative mechanisms involving the epidermal growth factor (EGF) and transforming growth factor beta (TGF-β1) ligands are potential alternative pathways for prostate cancer (PC) progression to androgen independence (AI). Thus, the combined effect of EGF and TGFB1 functional polymorphisms might modulate tumor microenvironment and consequently its development. We studied EGF+61G>A and TGFB1+869T>C functional polymorphisms in 234 patients with PC and 243 healthy individuals. Intermediate- and high-proliferation genetic profile carriers have increased risk for PC (odds ratio (OR)=3.76, P=0.007 and OR=3.98, P=0.004, respectively), when compared with low proliferation individuals. Multivariate analysis showed a significantly lower time to AI in the high proliferation group, compared with the low/intermediate proliferation genetic profile carriers (HR=2.67, P=0.039), after adjustment for age, metastasis and stage. Results suggest that combined analysis of target genetic polymorphisms may contribute to the definition of cancer susceptibility and pharmacogenomic profiles. Combined blockage of key molecules in proliferation signaling pathways could be one of the most promising strategies for androgen-independent prostate cancer.
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Acknowledgements
We thank the Liga Portuguesa Contra o Cancro—Centro Regional do Norte (Portuguese League Against Cancer); Yamanouchi—Astellas European Foundation Award for Prostate Cancer; FCT—Fundação para a Ciência e Tecnologia (PTDC/SAU-FCF/71552/2006), Portuguese governmental foundation for science and technology; this project was partially sponsored by an unrestricted educational grant for basic research in Molecular Oncology from Novartis Oncology Portugal; RR is a recipient of a Doctoral degree grant from FCT (SFRH/BD/30021/2006); ALT is a recipient of a Master degree grant from Liga Portuguesa Contra o Cancro- Programa de Apoio à Investigação Oncológica no Norte de Portugal 2008.
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Teixeira, A., Ribeiro, R., Morais, A. et al. Combined analysis of EGF+61G>A and TGFB1+869T>C functional polymorphisms in the time to androgen independence and prostate cancer susceptibility. Pharmacogenomics J 9, 341–346 (2009). https://doi.org/10.1038/tpj.2009.20
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DOI: https://doi.org/10.1038/tpj.2009.20
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