G-CSF receptor-mediated up-regulation of c-fos but not c-raf mRNA expression in myeloid cells.

Abstract:

:Granulocyte colony stimulating factor (G-CSF) regulates survival, proliferation, and differentiation of myeloid precursor cells. One of the signaling mechanisms for the G-CSF receptor (G-CSF-R) involves the activation of Ras/MAP kinase (MEK) pathway. Since Raf is an important, common link between Ras and MEK in the Ras-Raf-MEK cascade, we studied the expression of c-raf mRNA in G-CSF-treated myeloid precursor cell lines--NFS-60 and HL-60. G-CSF did not alter c-raf mRNA expression in these cells up to 24 h, but induced a transient up-regulation of c-fos mRNA expression between 15-60 min post-treatment. Our results show that G-CSF triggers a de novo induction of c-fos but not c-raf mRNA, and suggests that G-CSF-R-mediated activation of Ras/MEK pathway may involve post-transcriptional mechanisms of Raf regulation.

journal_name

Mol Cell Biochem

authors

Deshpande RV,Moore MA

doi

10.1023/a:1006894329316

subject

Has Abstract

pub_date

1998-01-01 00:00:00

pages

47-50

issue

1-2

eissn

0300-8177

issn

1573-4919

journal_volume

178

pub_type

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