alexa Identification of a novel dendritic cell-like subset of CD64(+) CD16(+) blood monocytes.
Immunology

Immunology

Journal of Clinical & Cellular Immunology

Author(s): GrageGriebenow E, Zawatzky R, Kahlert H, Brade L, Flad H,

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Abstract Human monocytes (Mo) consist of a major subset of Fcgamma-receptor I (CD64)-positive typical low accessory phagocytes, and a minor CD64(-) DC-like subset with high T cell-accessory and IFN-alpha-releasing activity. Both populations also differentially express CD16 (Fcgamma-receptor III). Double labeling with anti-CD64 and anti-CD16 mAb, as performed here, identified four different subsets. The CD64(-) subset consists of CD64(-) / 16(+) cells with high antigen-presenting cell (APC) function and macrophage-like phenotype, and a CD64(-) / 16(-) subset of less active APC but which exhibits a higher mixed lymphocyte reaction (MLR) stimulating and IFN-alpha-producing capacity, possibly resembling plasmacytoid dendritic cell type II (DC2) blood precursors. As well as the majority of CD64(+) cells that appeared CD64(+) / 16(-) and represent typical low-accessory, CD14(high) Mo, we could identify and describe a novel minor subset of CD64(+) / 16(+) cells which is unique in combining typical DC and Mo characteristics in the same cell. These are high IL-12 production, high accessory capacity for antigen- or allogen-activated lymphocytes, and high expression of HLA-DR, CD86, and CD11c. This article was published in Eur J Immunol and referenced in Journal of Clinical & Cellular Immunology

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