Upregulation of Lineage Specific Receptors and Ligands in Multipotential Progenitor Cells is Part of an Endogenous Program of Differentiation
作者:
JustUrsula,
FrielJutta,
HeberleinChristoph,
TamuraTeruko,
BaccariniManuela,
TessmerWe,
KlinglerKarl,
OstertagWolfram,
期刊:
Growth Factors
(Taylor Available online 1993)
卷期:
Volume 9,
issue 4
页码: 291-300
ISSN:0897-7194
年代: 1993
DOI:10.3109/08977199308991589
出版商: Taylor&Francis
关键词: cytokine receptors;dfferentiation;hematopoiesis
数据来源: Taylor
摘要:
Multipotent hematopoietic progenitor cell lines (FDCP-Mix) infected with a retroviral vector expressing the GM-CSF gene show functional downregulation of the GM-CSF receptor when maintained in IL-3 and activation of the receptor resulting in synchronous differentiation into mature granulocytes and macrophages on withdrawal of IL-3. This system has now been used to investigate whether or not receptors for some of the other growth factors are also influenced as a consequence of differentiation. We show here the lineage specific receptors for M-CSF, G-CSF and erythropoietin are all upregulated, regardless of whether or not differentiation is induced by GM-CSF or by other conditions. Concomitant induction of the mRNA coding for the ligands M-CSF and G-CSF, but not for erythropoietin, suggests that M-CSF and possibly G-CSF facilitate macrophage or granulocyte differentiation by an autocrine stimulation of the lineage specific receptors. FDCP-Mix mutants that are blocked in their ability to differentiate on exposure to GM-CSF, but that still require GM-CSF for proliferation, do not express increased levels of M-CSF receptor nor M-CSF. Based on these data, we suggest that expression of these lineage specific receptors is part of the intrinsic endogenous program of myeloid differentiation.
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