Induction of c-sis mRNA and activity similar to platelet-derived growth factor by transforming growth factor beta: a proposed model for indirect mitogenesis involving autocrine activity.
AUTOR(ES)
Leof, E B
RESUMO
Treatment of quiescent cultures of mouse embryo-derived AKR-2B cells with transforming growth factor beta resulted in an early induction of c-sis mRNA. The increase in c-sis mRNA was followed by a corresponding increase in protein similar to platelet-derived growth factor (PDGF) in the culture medium. In addition, PDGF-regulated genes (c-fos and c-myc) were stimulated by transforming growth factor beta with delayed kinetics relative to that seen in other cell systems with direct PDGF stimulation. A model is proposed in which the monolayer mitogenicity of transforming growth factor beta is mediated by the induction of c-sis and PDGF and the subsequent autocrine stimulation of c-fos, c-myc, and other PDGF-inducible genes.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=323316Documentos Relacionados
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