alexa CD14lowCD16high: a cytokine-producing monocyte subset which expands during human immunodeficiency virus infection.
Immunology

Immunology

Journal of Clinical & Cellular Immunology

Author(s): Thieblemont N, Weiss L, Sadeghi HM, Estcourt C, HaeffnerCavaillon N

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Abstract Infection with the human immunodeficiency virus HIV-1 is associated with the expansion of a CD14lowCD16high monocyte subset in peripheral blood. This subset, which represents a minor subpopulation of monocytes in healthy individuals, increases during HIV infection and, in patients with AIDS, may represent up to 40\% of the total circulating monocyte cell population. The CD14lowCD16high circulating monocytes co-express MAX.1, p150,95 and HLA-DR which are typical of tissue macrophage markers. These cells also express higher levels of intracellular interleukin (IL)-1 alpha and tumor necrosis factor (TNF)-alpha than the CD14highCD16low monocyte population from the same patients. The CD14lowCD16high cells also express low levels of CD35, CD11a and CD4 in common with normal monocytes. When cultured in vitro, monocytes from HIV-seropositive individuals differentiated within a few hours into an elongated fibroblastoid shape characteristic of migratory cells. Our results suggest that the expansion of the CD14lowCD16high monocyte subset, which produce high amount sof TNF-alpha and IL-1 alpha, may participate in the immune dysfunction observed during HIV infection. This article was published in Eur J Immunol and referenced in Journal of Clinical & Cellular Immunology

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