Human Monocytes - CD14, CD16 - Ziegler-Heitbrock

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Acute hyperglycemia impairs IL-6 expression in humans.

Abstract

Normal glucose metabolism is critical to immune function but the effects of short-term hyperglycemia on immunity are not well described. To study this phenomenon, we induced hyperglycemia in healthy subjects for 2 h with intravenous dextrose and octreotide. An RNA-seq analysis of whole blood RNA demonstrated alterations in multiple immune pathways and transcripts during acute hyperglycemia including decreased transcription of IL-6, an important component of both innate and adaptive immune responses. Additional in vitro studies of human peripheral blood mononuclear cells (PBMCs) exposed to high glucose confirmed decreased IL-6 expression, most prominently in CD14(+)CD16(+) intermediate monocytes. Hyperglycemia also reduced IL-17A expression suggesting further impairment of immune responses during acute hyperglycemia. These findings demonstrate multiple defective immune responses in acute hyperglycemia and suggest a novel role for intermediate monocytes as metabolically sensitive innate immune cells.

Authors: Spindler MP, Ho AM, Tridgell D, McCulloch-Olson M, Gersuk V, Ni C, Greenbaum C, Sanda S.
Journal: Immun Inflamm Dis.;4(1):91-7
Year: 2016
PubMed: Find in PubMed