4.5 Article

Regulation of scavenger receptor CD163 expression in human monocytes and macrophages by pro- and antiinflammatory stimuli

Journal

JOURNAL OF LEUKOCYTE BIOLOGY
Volume 67, Issue 1, Pages 97-103

Publisher

WILEY
DOI: 10.1002/jlb.67.1.97

Keywords

interleukin-10; interferon-gamma; inflammation; tumor necrosis factor alpha

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CD163, also referred to as M130, member of the scavenger receptor cysteine-rich family (SRCR) is exclusively expressed on cells of the monocyte lineage. In freshly isolated monocytes the CD14(bright) CD16(+) monocyte subset revealed the highest expression of CD163 among all monocyte subsets. CD163 mRNA and protein expression is up-regulated during macrophage colony-stimulating factor (M-CSF)-dependent phagocytic differentiation of human blood monocytes, In contrast, monocytic cells treated with GM-CSF and interleukin-4 (IL-P) for dendritic differentiation down-regulate this antigen. CD163 expression is also suppressed by proinflammatory mediators like lipopolysaccharide (LPS), interferon-gamma (IFN-gamma), and tumor necrosis factor alpha, whereas IL-6 and the antiinflammatory cytokine interleukin-10 (IL-10) strongly up-regulate CD163 mRNA in monocytes and macrophage. The effects of the immunosuppressants dexamethasone, cyclosporin A (CA), and cortisol differ in their capacity to influence CD163 mRNA levels, Our results demonstrate that CD163 expression in monocytes/macrophages is regulated by proinflammatory and antiinflammatory mediators, This expression pattern implies a functional role of CD163 in the antiinflammatory response of monocytes.

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