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Cell Growth & Differentiation, Vol 9, Issue 11 929-937, Copyright © 1998 by American Association of Cancer Research


ARTICLES

Synergistic effects of colony-stimulating factor 1 and leukemia inhibitory factor in inducing early myeloid cell differentiation

C Aperlo, L Sevilla, S Guerin, P Pognonec and KE Boulukos
Centre de Biochimie, Faculte des Sciences, Nice, France.

Cells of the M1D+ murine myeloid leukemic cell line differentiate into macrophages in response to either leukemia inhibitory factor (LIF) or interleukin 6. Previously, it was shown that LIF treatment of M1D+ cells leads to an increased expression of colony-stimulating factor (CSF) receptor mRNA encoded by c-fms. CSF-1, a macrophage growth factor, induces the survival, growth, and differentiation of mononuclear phagocytes but has not been implicated in the regulation of early myeloid cell differentiation. Here we show that low-dose LIF treatment of M1D+ cells results in CSF-1 secretion and CSF-1 receptor up-regulation. CSF-1, when applied alone, induces some M1D+ adherence and the up-regulation of lysozyme M, a macrophage-specific marker. Finally, we show that when applied together, LIF and CSF-1 act synergistically to induce macrophage morphology, phagocytosis, and the expression of the macrophage-specific markers CD11b/Mac-1 alpha chain, lysozyme M, FcgammaRII, and JE/MCP.1. These results indicate that instead of being part of exclusive pathways, as thought until this work, LIF and CSF-1 can function synergistically to further stimulate the early stages of myeloid differentiation.


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HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Cancer Research Clinical Cancer Research
Cancer Epidemiology Biomarkers & Prevention Molecular Cancer Therapeutics
Molecular Cancer Research Cell Growth & Differentiation
Copyright © 1998 by the American Association of Cancer Research.