Involvement of the Ras/MAPK signaling pathway in the modulation of urokinase production and cellular invasiveness by transforming growth factor-beta(1) in transformed keratinocytes

Santibanez, JF; Iglesias M.; Frontelo, P; Martinez, J.; Quintanilla, M

Abstract

Transformed PDV keratinocytes respond to TGF-beta(1) by stimulating cell motility and invasiveness concomitantly to enhancement of the urokinase-type plasminogen activator (uPA) expression/secretion. Depletion of extracellular signal-regulated kinase (ERK1, 2) proteins by treatment of PDV cells with antisense oligonucleotides reduced basal uPA production and abolished stimulation of uPA secreted levels and cell motility by TGF-beta(1). PD098059, an inhibitor of mitogen-activated protein kinase (MAPK) kinase (MEK), decreased TGF-beta(1)-induced uPA mRNA expression, secreted activity in a dose-dependent manner, and abrogated TGF-beta(1)-stimulated cell motility and invasiveness. PDV-derived dominant-negative RasN17 cell transfectants secreted similar amounts of uPA and exhibited similar invasive abilities as the parental cells or control clones, but were unable to respond to TGF-beta(1) for stimulation of uPA-secreted levels and invasiveness. These results suggest that a Ras/MAPK transduction pathway is involved in the invasive response of transformed keratinocytes to TGF-beta(1). (C) 2000 Academic Press.

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Título según WOS: Involvement of the Ras/MAPK signaling pathway in the modulation of urokinase production and cellular invasiveness by transforming growth factor-beta(1) in transformed keratinocytes
Título según SCOPUS: Involvement of the Ras/MAPK signaling pathway in the modulation of urokinase production and cellular invasiveness by transforming growth factor-?1 in transformed keratinocytes
Título de la Revista: BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
Volumen: 273
Número: 2
Editorial: Elsevier
Fecha de publicación: 2000
Página de inicio: 521
Página final: 527
Idioma: English
URL: http://linkinghub.elsevier.com/retrieve/pii/S0006291X00929462
DOI:

10.1006/bbrc.2000.2946

Notas: ISI, SCOPUS