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• W4387440785 endingPage "110992" @default.
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• W4387440785 abstract "Sepsis begins with vascular endothelial barrier breakdown and causes widespread organ failure. Protease-activated receptor 1 (PAR1) is an important target for modulating vascular endothelial permeability; however, little research has been undertaken in sepsis, and its putative molecular mechanism remains unknown. The vascular endothelial permeability was examined by detecting FITC-dextran flux. F-actin was examined by immunofluorescence (IF). PAR1, ERM phosphorylation, and RhoA/ROCK signaling pathway expression in lipopolysaccharide (LPS)-stimulated human umbilical vein endothelial cells (HUVECs) line were examined by IF and Western blot. To develop the sepsis model, cecal ligation and puncture (CLP) were conducted. The PAR1 inhibitor SCH79797 was utilized to inhibit PAR1 expression in vivo. Vascular permeability in main organs weres measured by Evans blue dye extravasation. The pathological changes in main organs were examined by HE staining. The expression of PAR1, ERM phosphorylation, and the RhoA/ROCK signaling pathway was examined using IF, immunohistochemical and WB in CLP mice. In vitro, in response to LPS stimulation of HUVECs, PAR1 mediated the phosphorylation of ERM, promoted F-actin rearrangement, and increased endothelial hyperpermeability, all of which were prevented by inhibiting PAR1 or RhoA. Additionally, inhibiting PAR1 expression reduced RhoA and ROCK expression. In vivo, we showed that inhibiting PAR1 expression will reduce ezrin/radixin/moesin (ERM) phosphorylation to relieve vascular endothelial barrier dysfunction and thereby ameliorate multiorgan dysfunction syndrome (MODS) in CLP-induced septic mice. This study revealed that PAR1-mediated phosphorylation of ERM induced endothelial barrier dysfunction, which in turn led to MODS in sepsis, and that the RhoA/ROCK signaling pathway underlay these effects." @default.
• W4387440785 created "2023-10-10" @default.
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• W4387440785 date "2023-11-01" @default.
• W4387440785 modified "2023-10-16" @default.
• W4387440785 title "PAR1 regulates sepsis-induced vascular endothelial barrier dysfunction by mediating ERM phosphorylation via the RhoA/ROCK signaling pathway" @default.
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• W4387440785 doi "https://doi.org/10.1016/j.intimp.2023.110992" @default.
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