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Peroxisome Proliferator-Activated Receptor Induces the Expression of Tissue Factor Pathway Inhibitor-1 (TFPI-1) in Human Macrophages

Overview
Journal PPAR Res
Publisher Wiley
Date 2017 Jan 25
PMID 28115923
Citations 4
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Abstract

Tissue factor (TF) is the initiator of the blood coagulation cascade after interaction with the activated factor VII (FVIIa). Moreover, the TF/FVIIa complex also activates intracellular signalling pathways leading to the production of inflammatory cytokines. The TF/FVIIa complex is inhibited by the tissue factor pathway inhibitor-1 (TFPI-1). Peroxisome proliferator-activated receptor gamma (PPAR) is a transcription factor that, together with PPAR and PPAR/, controls macrophage functions. However, whether PPAR activation modulates the expression of TFP1-1 in human macrophages is not known. Here we report that PPAR activation increases the expression of TFPI-1 in human macrophages in vitro as well as in vivo in circulating peripheral blood mononuclear cells. The induction of TFPI-1 expression by PPAR ligands, an effect shared by the activation of PPAR and PPAR/, occurs also in proinflammatory M1 and in anti-inflammatory M2 polarized macrophages. As a functional consequence, treatment with PPAR ligands significantly reduces the inflammatory response induced by FVIIa, as measured by variations in the IL-8, MMP-2, and MCP-1 expression. These data identify a novel role for PPAR in the control of TF the pathway.

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