Exogenous Platelet-Derived Growth Factor (PDGF) induces human astrocytoma cell line proliferation

E. Ranza, Angelica Facoetti, P. Morbini, E. Benericetti, R. Nano

Research output: Contribution to journalArticle

Abstract

Platelet-derived growth factor receptors (PDGFR) regulate several processes in normal cells including cellular proliferation, differentiation and migration, and are widely expressed in a variety of malignancies. In astrocytoma, PDGF ligand and receptor are often overexpressed and PDGFR activity deregulation has been linked to pathogenesis. The issue of the functional capacity of PDGFR has only occasionally been addressed in glioma cells by measuring the proliferative response induced by exogenous PDGF. In the present study, PDGFRα expression was evaluated in human grade 2 and 4 astrocytoma cell lines and tissue specimens by immunocytochemistry. The receptor responsiveness to exogenous PDGF was determined in astrocytoma cells with an MTT assay. It was found that astrocytoma cells express PDGFRα and respond to PDGF mitogenic action in a grade-dependent manner. The receptor was found to be functional since it induced cell proliferation at different ligand concentrations. We can thus conclude that the proliferative response of human astrocytoma cells is related to their malignancy and receptor status before PDGF stimulation, suggesting a role for PDGFRα inhibitors as blockers of malignant cell proliferation.

Original languageEnglish
Pages (from-to)2161-2166
Number of pages6
JournalAnticancer Research
Volume27
Issue number4 B
Publication statusPublished - Jul 2007

Keywords

  • Astrocytoma
  • PDGF
  • PDGF receptor
  • Platelet-derived growth factor
  • Proliferation

ASJC Scopus subject areas

  • Cancer Research
  • Oncology

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