H7, an inhibitor of protein kinase C, prevents serum-induced phosphorylation of Raf and MAP kinase in neuroblastoma cells.

Abstract:

:We have previously shown that 1-(5-isoquinolinylsulfonyl)-2-methylpiperazine (H7), an inhibitor of protein kinase C, inhibits proliferation of neuroblastoma cells in culture. We have now tested whether the effect of H7 is mediated by MAP kinase and Raf. It is shown that, in Neuro 2a cells, activation of protein kinase C by addition of 4 beta-phorbol-12 beta-myristate-13 alpha-acetate (PMA), leads to phosphorylation of Raf and Mitogen-activated protein kinase (MAP kinase). PMA-induced phosphorylation of these proteins is prevented by H7. When quiescent Neuro 2a were stimulated to proliferate by addition of serum, Raf and MAP kinase were rapidly phosphorylated. Serum-induced phosphorylation of Raf and MAP kinase is prevented by H7. These results suggest that, in Neuro 2a cells, the control of proliferation by protein kinase C could be mediated by phosphorylation (and concomitant activation) of Raf and MAP kinase.

journal_name

Neurosci Lett

journal_title

Neuroscience letters

authors

Cabedo H,Felipo V,Miñana MD,Grisolía S

doi

10.1016/0304-3940(96)12867-6

subject

Has Abstract

pub_date

1996-08-16 00:00:00

pages

13-6

issue

1

eissn

0304-3940

issn

1872-7972

pii

S0304394096128676

journal_volume

214

pub_type

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