title: Genistein and curcumin block TGF-beta 1-induced u-PA expression and migratory and invasive phenotype in mouse epidermal keratinocytes.
abstract: Transforming growth factor-beta 1 (TGF-beta 1) stimulates migration/invasion of mouse transformed keratinocytes and increases urokinase (u-PA) expression/secretion. In this report, we analyzed the biological behavior of two naturally occurring inhibitors of protein tyrosine kinases, genistein and curcumin, that could abrogate the enhancement of u-PA levels induced by TGF-beta 1 in transformed keratinocytes. Our results showed that genistein and curcumin blocked this response in a dose-dependent manner and also inhibited the TGF-beta 1-induced synthesis of fibronectin, an early responsive gene to the growth factor. Both compounds also reduced TGF-beta 1-stimulated cell migration and invasiveness. These results suggest that a tyrosine kinase-signaling pathway should be involved in TGF-beta 1-mediated increased malignancy of transformed keratinocytes and that genistein and curcumin could play an important role in inhibiting tumor progression.
authors.affiliation: Laboratorio de Biología Celular, INTA, Universidad de Chile, Santiago, Chile.
authors.forename: J F
authors.initials: JF
authors.lastname: Santibáñez
authors.forename: M
authors.initials: M
authors.lastname: Quintanilla
authors.forename: J
authors.initials: J
authors.lastname: Martínez
mesh_terms: D000818:Animals; D015153:Blotting, Western; D002465:Cell Movement / Q000187:drug effects; D002478:Cells, Cultured; D003474:Curcumin / Q000494:pharmacology*; D000078404:Epidermal Cells; D004817:Epidermis / Q000187:drug effects; D005455:Fluorescent Antibody Technique; D019833:Genistein / Q000037:antagonists & inhibitors / Q000494:pharmacology*; D015603:Keratinocytes / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D051379:Mice; D011505:Protein-Tyrosine Kinases / Q000378:metabolism; D016212:Transforming Growth Factor beta / Q000494:pharmacology*; D014568:Urokinase-Type Plasminogen Activator / Q000187:drug effects* / Q000378:metabolism
chemical_list: D016212:Transforming Growth Factor beta; D019833:Genistein; D011505:Protein-Tyrosine Kinases; D014568:Urokinase-Type Plasminogen Activator; D003474:Curcumin