Growth factor PDGF-B/v-sis confers a tumorigenic phenotype to human tumor cells bearing PDGF receptors but not to cells devoid of receptors: evidence for an autocrine, but not a paracrine, mechanism.

Abstract excerpt

Numerous established human tumor lines co-express platelet-derived growth factor (PDGF) and cognate receptors, suggesting that an autocrine and/or paracrine growth mechanism may be a causal or contributing mechanism to their transformed phenotype. Indeed, it is known that a PDGF-autocrine system is functional in several established tumor lines, especially in human gliomas, and a model for a functional paracrine...

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