Dendritic cells and macrophages can mature independently from a human bone marrow-derived, post-colony-forming unit intermediate Journal Article


Authors: Szabolcs, P.; Avigan, D.; Gezelter, S.; Ciocon, D. H.; Moore, M. A. S.; Steinman, R. M.; Young, J. W.
Article Title: Dendritic cells and macrophages can mature independently from a human bone marrow-derived, post-colony-forming unit intermediate
Abstract: CD34(+) precursors in normal human bone marrow (BM) generate large numbers of dendritic cells alongside macrophages and granulocytic precursors when cultured for 12 to 14 days in c-kit ligand, granulocyte-macrophage colony-stimulating factor (GM-CSF), and tumor necrosis factor-alpha (TNF-alpha). This study reports an intermediate cell type that develops by day 6, and has the potential to differentiate into either macrophages or dendritic cells. When the d6 progeny are depleted of mature macrophages and residual CD34(+) precursors, a discrete CD14(+) HLA-DR(+) population persists in addition to immunostimulatory CD14(-) HLA-DR(+++) dendritic cells. Half of the CD14(+) HLA-DR(+) population is in cell cycle (Ki-67(+)), but colony-forming units (CFUs) are no longer detectable. The cells are c-fms(+), but lack myeloperoxidase and nonspecific esterase. They also possess substantial phagocytic and allostimulatory activity. These post-CFU, CD14(+) HLA-DR(+) intermediates develop into typical macrophages when recultured in the absence of exogenous cytokines. M-CSF supports up to similar to 2.5-fold expansion of macrophage progeny. In contrast, the combination of GMCSF and TNF-LU supports quantitative differentiation into dendritic cells, lacking c-fms, CD14, and other macrophage properties, and expressing HLA-DR, CD1a, CD83, CD80, CD86, and potent allostimulatory activity. Therefore, normal CD34(+) BM precursors can generate a post-CFU bipotential intermediate in the presence of c-kit ligand, GM-CSF, and TNF-alpha. This intermediate cell type will develop along the dendritic cell pathway when macrophages are removed and GM-CSF and TNF-alpha are provided. Alternatively, it can differentiate along a macrophage pathway when recultured with or without M-CSF. (C) 1996 by The American Society of Hematology.
Keywords: proliferation; tumor-necrosis-factor; factor-alpha; peripheral-blood; t-cells; gm-csf; human-monocytes; stimulating factor; epidermal langerhans cells; cd34+ progenitors
Journal Title: Blood
Volume: 87
Issue: 11
ISSN: 0006-4971
Publisher: American Society of Hematology  
Date Published: 1996-06-01
Start Page: 4520
End Page: 4530
Language: English
ACCESSION: WOS:A1996UN79700006
PROVIDER: wos
PUBMED: 8639819
DOI: 10.1182/blood.V87.11.4520.bloodjournal87114520
Notes: Article -- Source: Wos
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  1. James W Young
    301 Young
  2. Malcolm A S Moore
    527 Moore