Expression of HER/erbB family of receptor tyrosine kinases and induction of differentiation by glial growth factor 2 in human rhabdomyosarcoma cells

C. Ricci, L. Landuzzi, I. Rossi, C. De Giovanni, G. Nicoletti, A. Astolfi, S. Pupa, S. Menard, K. Scotlandi, P. Nanni, Pier Luigi Loluni

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Five human rhabdomyosarcoma cell lines were used to investigate the surface expression of HER/erbB receptors, particularly of HER-2, HER-3 and HER-4, by flow cytometry. HER-2 was expressed in 3/5 rhabdomyosarcoma cell lines. HER-3 was expressed in all rhabdomyosarcoma cell lines. None of the rhabdomyosarcoma cell lines investigated showed HER-4 surface expression. To study the biological activity of HER/erbB receptors in rhabdomyosarcomas, cells were cultured in the presence of glial growth factor 2 (GGF2), a specific ligand of HER-3 that is able to stimulate myogenesis in normal myoblasts. In 3 of 3 human rhabdomyosarcoma cell lines positive for both HER- 2 and HER-3 receptors, the treatment with GGF-2 induced a significant increase in myogenic differentiation. (C) 2000 Wiley-Liss, Inc.

Original languageEnglish
Pages (from-to)29-36
Number of pages8
JournalInternational Journal of Cancer
Issue number1
Publication statusPublished - 2000


ASJC Scopus subject areas

  • Cancer Research
  • Oncology

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