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Cell Growth & Differentiation, Vol 2, Issue 9 421-427, Copyright © 1991 by American Association of Cancer Research


ARTICLES

The network of hemopoietic regulatory proteins in myeloid cell differentiation

J Lotem, Y Shabo and L Sachs
Department of Molecular Genetics and Virology, Weizmann Institute of Science, Rehovot, Israel.

There are clones of myeloid leukemic cells that can be induced to undergo terminal cell differentiation to macrophages by normal hemopoietic regulatory proteins. Induction of differentiation in two different clones of myeloid leukemic cells with interleukin 6 (IL-6) or granulocyte-macrophage colony-stimulating factor (GM-CSF) resulted in induction of mRNA for the hemopoietic regulatory proteins IL-6, GM-CSF, interleukin 1 alpha and interleukin 1 beta, tumor necrosis factor, and transforming growth factor beta 1. In one of these clones, induction of differentiation with GM-CSF was also associated with induction of mRNA for macrophage colony-stimulating factor (M-CSF) but not for the receptor for M-CSF (c-fms), whereas in the other clone, induction of differentiation with IL-6 was associated with induction of mRNA for both c-fms and M-CSF. The clones also differed in their responsiveness to these regulators. There was no induction of mRNA for granulocyte colony-stimulating factor or interleukin 3 during differentiation of either clone. The results indicate that the genes for a nearly normal network of positive and negative hemopoietic regulatory proteins are induced during differentiation of these myeloid leukemic cells and that there are leukemic clones with specific defects in this network.


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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 © 1991 by the American Association of Cancer Research.