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Characterization of Antigen-presenting Activity of Intestinal Mononuclear Cells Isolated from Normal and Inflammatory Bowel Disease Colon and Ileum

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Journal Immunology
Date 1988 Dec 1
PMID 2975633
Citations 15
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Abstract

Antigen-presenting activity in mononuclear cells, isolated from normal and inflamed human ileum and colon, has been characterized using allogeneic mixed lymphocyte reaction with resting T cells as responders. Greatest proliferation was induced by fibronectin-adherent (macrophage-enriched) cells, and least by fibronectin non-adherent (macrophage-depleted) cells and by mononuclear cells depleted of macrophages by panning with monoclonal antibody 3C10. When intestinal mononuclear cells and allogeneic T cells were incubated in large numbers, clusters were observed. These clusters contained cells with a dendritic morphology that were strongly HLA-D-positive and which also stained with macrophage-specific monoclonal antibodies 3C10, EMB11 and Y1/82A. These cells were closely associated with proliferating T cells. Studies comparing mononuclear cells isolated from normal and inflamed colonic mucosa suggest that the latter may have enhanced antigen-presenting capacity.

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