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2015 ; 2015
(ä): 145305
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MiR-146b Mediates Endotoxin Tolerance in Human Phagocytes
#MMPMID26451077
Renzi TA
; Rubino M
; Gornati L
; Garlanda C
; Locati M
; Curtale G
Mediators Inflamm
2015[]; 2015
(ä): 145305
PMID26451077
show ga
A proper regulation of the innate immune response is fundamental to keep the
immune system in check and avoid a chronic status of inflammation. As they act as
negative modulators of TLR signaling pathways, miRNAs have been recently involved
in the control of the inflammatory response. However, their role in the context
of endotoxin tolerance is just beginning to be explored. We here show that
miR-146b is upregulated in human monocytes tolerized by LPS, IL-10, or TGF?
priming and demonstrate that its transcription is driven by STAT3 and RUNX3, key
factors downstream of IL-10 and TGF? signaling. Our study also found that IFN?,
known to revert LPS tolerant state, inhibits miR-146b expression. Finally, we
provide evidence that miR-146b levels have a profound effect on the tolerant
state, thus candidating miR-146b as a molecular mediator of endotoxin tolerance.