Phosphatidylinositol 3-kinase contributes to Erk1/Erk2 MAP kinase activation associated with hepatocyte growth factor-induced cell scattering

Szabolcs Sipeki, Erzsébet Bander, László Buday, Gyöngyi Farkas, Ernõ Bácsy, D. Kirk Ways, Anna Faragó

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55 Citations (Scopus)

Abstract

MAP kinase cascade-dependent responses were investigated during scattering of HepG2 human hepatoma cells stimulated by HGF or phorbol ester. Inhibition of phosphatidylinositol 3-kinase with LY294002 prevented completely the dissociation of cells. Inhibition of MAP kinase kinase (MEK) with PD98059 prevented the development of characteristic morphological changes associated with cell migration. EGF, which failed to induce cell scattering, caused a short-term increase in the phosphorylation of Erk1/Erk2 MAP kinases. On the contrary, HGF or phorbol ester stimulated the phosphorylation of MAP kinases for a long time. Experiments performed with LY294002 indicated that phosphatidylinositol 3-kinase contributed to the HGF-stimulated phosphorylation of Erk1/Erk2. This finding was confirmed by the demonstration that the MAP kinase cascade-dependent expression of a high-Mr (>300 kDa) protein pair appearing in the course of cell scattering was inhibited by LY294002 in HGF-induced cells but was not inhibited in phorbol ester-treated cells. Copyright (C) 1999 Elsevier Science Inc.

Original languageEnglish
Pages (from-to)885-890
Number of pages6
JournalCellular Signalling
Volume11
Issue number12
DOIs
Publication statusPublished - Dec 1 1999

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Keywords

  • Cbl
  • Cell scattering
  • EGF
  • HGF
  • HepG2 cells
  • MAP kinase cascade
  • high-Mr (>300 kDa) protein pair
  • phosphatidylinositol 3-kinase

ASJC Scopus subject areas

  • Cell Biology

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