Control of meningioma cell growth by platelet-derived growth factor (PDGF)

Alessandro Mauro, Alessia Di Sapio, Cristina Mocellini, Davide Schiffer

Research output: Contribution to journalArticle

Abstract

We have examined the possible involvement of PDGF and PDGF receptors in the growth control of five meningiomas, analyzing the biopsy specimens and the primary cultures derived from the same tumors. Light and electron microscopy demonstrated that MAbs against PDGF β-receptors immunodecorate meningioma cells in vivo and in vitro, while those against α-receptors gave negative results. The effects of PDGF isoforms AA, AB, BB and of PDGF neutralizing antibodies on meningioma cultures were examined using [3H]thymidine incorporation analysis. Only with PDGF-AB and -BB a mitogenic effect was observed, while PDGF-neutralizing antibodies produced a reduction of [3H]thymidine incorporation. The production of PDGF-like growth factors by meningioma cells was tested analyzing the effects of meningioma culture-conditioned media on the growth of Swiss 3T3 cells. In all cases meningioma conditioned media stimulated the in vitro growth of 3T3 fibroblasts and this stimulatory effect was strongly reduced by PDGF-neutralizing antibodies. Furthermore, Northern blot analysis demonstrated expression of c-sis/PDGF-B and PDGF β-receptors mRNA in all meningioma biopsies and in all the derived cultures. Our results provide strong evidence that PDGF-B chain and PDGF β-receptors are involved in growth control mechanisms of human meningiomas through autocrine and/or paracrine mechanisms.

Original languageEnglish
Pages (from-to)135-143
Number of pages9
JournalJournal of the Neurological Sciences
Volume131
Issue number2
DOIs
Publication statusPublished - 1995

Keywords

  • Autocrine system
  • Cell culture
  • Growth factors
  • Meningioma
  • PDGF receptor
  • Platelet-derived growth factor

ASJC Scopus subject areas

  • Clinical Neurology
  • Neurology
  • Ageing
  • Surgery
  • Developmental Neuroscience
  • Neuroscience(all)

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