Linked Life Data

2555152

Source:http://linkedlifedata.com/resource/pubmed/id/2555152

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
10
pubmed:dateCreated
1990-1-2
pubmed:abstractText
We have prepared a population of bone marrow cells that is highly enriched in neutrophil/macrophage progenitor cells (GM-CFC). Four distinct haemopoietic growth factors can stimulate the formation of mature cells from this population, although the proportions of neutrophils and/or macrophages produced varied depending on the growth factor employed: interleukin 3 (IL-3) and granulocyte/macrophage colony-stimulating factor (GM-CSF) stimulated the formation of colonies containing both neutrophils and macrophages; macrophage colony-stimulating factor (M-CSF) produced predominantly macrophage colonies; and granulocyte colony-stimulating factor (G-CSF) promoted neutrophil colony formation. Combinations of these four growth factors did not lead to any additive or synergistic effect on the number of colonies produced in clonal soft agar assays, indicating the presence of a common set of cells responsive to all four haemopoietic growth factors. These enriched progenitor cells therefore represent an ideal population to study myeloid growth-factor-stimulated survival, proliferation and development. Using this population we have examined the molecular signalling mechanisms associated with progenitor cell proliferation. We have shown that modulation of cyclic AMP levels has no apparent role in GM-CFC proliferation, whereas phorbol esters and/or Ca2+ ionophore can stimulate DNA synthesis, indicating a possible role for protein kinase C activation and increased cytosolic Ca2+ levels in the proliferation of these cells. The lack of ability of all four myeloid growth factors to mobilize intracellular Ca2+ infers that these effects are not achieved via inositol lipid hydrolysis.(ABSTRACT TRUNCATED AT 250 WORDS)
pubmed:commentsCorrections
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pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0261-4189
pubmed:author
pubmed:issnType
Print
pubmed:volume
8
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2967-74
pubmed:dateRevised
2009-11-18
pubmed:meshHeading
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