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    An activated protein kinase C alpha gives a differentiation signal for hematopoietic progenitor cells and mimicks macrophage colony-stimulating factor-stimulated signaling events.

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    Authors
    Pierce, A
    Heyworth, Clare M
    Nicholls, S E
    Spooncer, Elaine
    Dexter, T Michael
    Lord, J M
    Owen-Lynch, P J
    Wark, G
    Whetton, Anthony D
    Affiliation
    Leukaemia Research Fund Cellular Development Unit, University of Manchester Institute of Science and Technology, Manchester, M60 1QD, United Kingdom.
    Issue Date
    1998-03-23
    
    Metadata
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    Abstract
    Highly enriched, bipotent, hematopoietic granulocyte macrophage colony-forming cells (GM-CFC) require cytokines for their survival, proliferation, and development. GM-CFC will form neutrophils in the presence of the cytokines stem cell factor and granulocyte colony-stimulating factor, whereas macrophage colony-stimulating factor leads to macrophage formation. Previously, we have shown that the commitment to the macrophage lineage is associated with lipid hydrolysis and translocation of protein kinase C alpha (PKCalpha) to the nucleus. Here we have transfected freshly prepared GM-CFC with a constitutively activated form of PKCalpha, namely PKAC, in which the regulatory domain has been truncated. Greater than 95% of the transfected cells showed over a twofold increase in PKCalpha expression with the protein being located primarily within the nucleus. The expression of PKAC caused macrophage development even in the presence of stimuli that normally promote only neutrophilic development. Thus, M-CSF-stimulated translocation of PKCalpha to the nucleus is a signal associated with macrophage development in primary mammalian hematopoietic progenitor cells, and this signal can be mimicked by ectopic PKAC, which is also expressed in the nucleus.
    Citation
    An activated protein kinase C alpha gives a differentiation signal for hematopoietic progenitor cells and mimicks macrophage colony-stimulating factor-stimulated signaling events. 1998, 140 (6):1511-8 J. Cell Biol.
    Journal
    The Journal of Cell Biology
    URI
    http://hdl.handle.net/10541/92761
    PubMed ID
    9508782
    Type
    Article
    Language
    en
    ISSN
    0021-9525
    Collections
    All Paterson Institute for Cancer Research

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