CLINICS 2011;66(7):1143-1147 TGF-b in prostate cancer Reis ST et al. 24. Prindull G, Zipori D. Environmental guidance of normal and tumor cell plasticity: epithelial mesenchymal transitions as a paradigm. Blood. 2004;103: 2892–99, doi: 10.1182/blood-2003-08-2807. 25. Letterio JJ, Roberts AB. Regulation of immune responses by TGF-b. Annu Rev Immunol. 1998;16:137–61, doi: 10.1146/annurev.immunol.16. 1.137. 1147