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The removal from stored autologous host bone marrow of a monocytoid cell population by exposure to methylprednisolone is associated with successful introduction of unresponsiveness to renal allografts in irradiated recipients reconstituted with such treated marrow. The eliminated cells are a prominent component of the canine long bone marrow interstitium and share a number of important properties with dendritic cells (DC), including size and shape; poor or nonadherence to plastic or glass surfaces; negative staining for neutral esterase, acid phosphatase, or peroxidase; nonphagocytic; Ia positive, but negative for IgG or IgM; ability to act as accessory cells in augmenting the intensity of allogeneic mixed-lymphocyte reactions. Both cell types are of bone marrow origin and are susceptible to steroids in vitro. The results suggest that the bone marrow interstitial cells identified in the course of this study may be enriched with populations of canine dendritic cell precursors and dendritic cells at various stages of differentiation. The detection of a receptor site for Helix promatia on the surface of such cells may be of usefulness in their further characterization and in the analysis of their precise role in the modulation of allogeneic unresponsiveness.
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F T Rapaport, and
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E P Cronkite
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F T Rapaport, and
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E P Cronkite
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F T Rapaport, and
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F T Rapaport, and
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K Sato, and
S Miura, and
A Chanana, and
E P Cronkite
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Transplantation proceedings,
F T Rapaport, and
A N Arnold, and
H Asari, and
K Sato, and
S Miura, and
A Chanana, and
E P Cronkite
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Transplantation proceedings,
F T Rapaport, and
A N Arnold, and
H Asari, and
K Sato, and
S Miura, and
A Chanana, and
E P Cronkite
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