scholarly journals High-mobility group box 1 protein induces tissue factor expression in vascular endothelial cells via activation of NF-κB and Egr-1

2009 ◽  
Vol 102 (08) ◽  
pp. 352-359 ◽  
Author(s):  
Haichao Wang ◽  
Yiting Tang ◽  
Zhang Fan ◽  
Ben Lv ◽  
Xianzhong Xiao ◽  
...  
Keyword(s):  
Endothelial Cells ◽  
Cell Surface ◽  
Tissue Factor ◽  
Vascular Endothelial Cells ◽  
High Mobility ◽  
High Mobility Group ◽  
Cell Surface Receptors ◽  
Dependent Manner ◽  
Vascular Endothelial ◽  
Surface Receptors

SummaryHigh-mobility group box 1 protein (HMGB1), an abundant nuclear protein, was recently established as a proinflammatory mediator of experimental sepsis.Although extracellular HMGB1 has been found in atherosclerotic plaques, its potential role in the pathogenesis of atherothrombosis remains elusive. In the present study, we determined whether HMGB1 induces tissue factor (TF) expression in vascular endothelial cells (ECs) and macrophages. Our data showed that HMGB1 stimulated ECs to express TF (but not TF pathway inhibitor) mRNA and protein in a concentration and time-dependent manner. Blockade of cell surface receptors (including TLR4, TLR2, and RAGE) with specific neutralising antibodies partially reduced HMGB1-induced TF expression. Moreover, HMGB1 increased expression of Egr-1 and nuclear translocation of NF-κB (c-Rel/p65) in ECs. Taken together, our data suggest that HMGB1 induces TF expression in vascular endothelial cells via cell surface receptors (TLR4, TLR2, and RAGE), and through activation of transcription factors (NF-κB and Egr-1).

Histidine-Rich Glycoprotein Inhibits High Mobility Group Box 1-Mediated Pathways in Vascular Endothelial Cells

2019 ◽  
Author(s):  
Shangze Gao ◽  
Hidenori Wake ◽  
Masakiyo Sakaguchi ◽  
Dengli Wang ◽  
Youhei Takahashi ◽  
...  
Keyword(s):  
Endothelial Cells ◽  
Vascular Endothelial Cells ◽  
High Mobility ◽  
High Mobility Group ◽  
Vascular Endothelial

scholarly journals NRP1 regulates HMGB1 in vascular endothelial cells under high homocysteine condition

2019 ◽  
Vol 316 (5) ◽  
pp. H1039-H1046 ◽  
Author(s):  
Yeshuo Ma ◽  
Zhen Zhang ◽  
Runtai Chen ◽  
Rui Shi ◽  
Pingyu Zeng ◽  
...  
Keyword(s):  
Endothelial Cells ◽  
Plasma Level ◽  
Thoracic Aorta ◽  
Rat Model ◽  
Vascular Endothelial Cells ◽  
High Mobility ◽  
High Mobility Group ◽  
Vascular Endothelial ◽  
Endothelial Inflammation ◽  
Neuropilin 1

Endothelial inflammation plays an important role in hyperhomocysteinemia (HHcy)-associated vascular diseases. High mobility group box 1 (HMGB1) is a pro-inflammatory danger molecule produced by endothelial cells. However, whether HMGB1 is involved in vascular endothelial inflammation of HHcy is poorly understood. Neuropilin-1 (NRP1) mediates inflammatory response and activates mitogen-activated protein kinases (MAPKs) pathway that has been reported to be involved in regulation of HMGB1. The aim of this study was to determine the alteration of HMGB1 in HHcy, and the role of NRP1 in regulation of endothelial HMGB1 under high homocysteine (Hcy) condition. In the present study, we first observed that the plasma level of HMGB1 was elevated in HHcy patients and an experimental rat model, and increased HMGB1 was also observed in the thoracic aorta of an HHcy rat model. HMGB1 was induced by Hcy accompanied with upregulated NRP1 in vascular endothelial cells. Overexpression of NRP1 promoted expression and secretion of HMGB1 and endothelial inflammation; knockdown of NRP1 inhibited HMGB1 and endothelial inflammation induced by Hcy, which partially regulated through p38 MAPK pathway. Furthermore, NRP1 inhibitor ATWLPPR reduced plasma HMGB1 level and expression of HMGB1 in the thoracic aorta of HHcy rats. In conclusion, our data suggested that Hcy requires NRP1 to regulate expression and secretion of HMGB1. The present study provides the evidence for inhibition of NRP1 and HMGB1 to be the novel therapeutic targets of vascular endothelial inflammation in HHcy in the future. NEW & NOTEWORTHY This study shows for the first time to our knowledge that the plasma level of high mobility group box 1 (HMGB1) is elevated in hyperhomocysteinemia (HHcy) patients, and homocysteine promotes expression and secretion of HMGB1 partially regulated by neuropilin-1 in endothelial cells, which is involved in endothelial inflammation. Most importantly, these new findings will provide a potential therapeutic strategy for vascular endothelial inflammation in HHcy.

scholarly journals Histidine-Rich Glycoprotein Inhibits High-Mobility Group Box-1-Mediated Pathways in Vascular Endothelial Cells through CLEC-1A

iScience ◽  
2020 ◽  
Vol 23 (6) ◽  
pp. 101180
Author(s):  
Shangze Gao ◽  
Hidenori Wake ◽  
Masakiyo Sakaguchi ◽  
Dengli Wang ◽  
Youhei Takahashi ◽  
...  
Keyword(s):  
Endothelial Cells ◽  
Vascular Endothelial Cells ◽  
High Mobility ◽  
High Mobility Group ◽  
Vascular Endothelial

Activated Platelets Induce Tissue Factor Expression on Human Umbilical Vein Endothelial Cells by Ligation of CD40

1998 ◽  
Vol 80 (12) ◽  
pp. 1008-1041 ◽  
Author(s):  
Matthias Kalbas ◽  
Antje Willuweit ◽  
Volker Henn ◽  
Richard Kroczek ◽  
Gert Müller-Berghaus ◽  
...  
Keyword(s):  
Wound Healing ◽  
Endothelial Cells ◽  
Tissue Factor ◽  
Vascular Endothelial Cells ◽  
Tissue Injury ◽  
Pyrrolidine Dithiocarbamate ◽  
Type I ◽  
Dependent Manner ◽  
Vascular Endothelial ◽  
Activated Platelets

SummaryCD40 is a type I member of the tumour necrosis factor (TNF) receptor superfamily of proteins, and is present on a wide variety of cells including vascular endothelial cells. Ligation of this receptor on endothelial cells is known to increase expression of inflammatory adhesion molecules. We have recently demonstrated that platelets express the ligand of CD40 (CD154) within seconds of exposure to agonist, and interact with endothelial cells to participate directly in the induction of an inflammatory response. Here we show that activated platelets induce tissue factor (TF) expression on endothelial cells in a CD40/CD154-dependent manner, and that the magnitude of this response can equal that induced by TNFα. Moreover, CD40 ligation on endothelial cells downregulates the expression of thrombomodulin. We also show that CD40-mediated TF expression is less sensitive to inhibition with the oxidative radical scavenger pyrrolidine dithiocarbamate than is that mediated by TNFα, indicating that CD40 has a distinct signalling pathway. Tissue factor is a cell membrane protein which functions as the main trigger of the extrinsic pathway of blood coagulation, and its expression on endothelial cells is implicated in wound healing and angiogenesis. Since platelets are among the first cells involved in haemostasis following tissue injury, our data showing that ligation of CD40 by CD154 induces a procoagulant phenotype on vascular endothelial cells suggests that platelets may play an important role in the induction of wound healing.

Surface-retained tPA is essential for effective fibrinolysis on vascular endothelial cells

Blood ◽  
2011 ◽  
Vol 118 (11) ◽  
pp. 3182-3185 ◽  
Author(s):  
Yuko Suzuki ◽  
Hideki Yasui ◽  
Tomasz Brzoska ◽  
Hideo Mogami ◽  
Tetsumei Urano
Keyword(s):  
Endothelial Cells ◽  
Cell Surface ◽  
Enzymatic Activity ◽  
De Novo ◽  
Vascular Endothelial Cells ◽  
Secretory Granules ◽  
Vascular Endothelial Cell ◽  
Clot Lysis ◽  
Dependent Manner ◽  
Vascular Endothelial

Abstract In a previous study, we demonstrated unique secretory dynamics of tissue plasminogen activator (tPA) in which tPA was retained on the cell surface in a heavy chain–dependent manner after exocytosis from secretory granules in vascular endothelial cells. Here, we examined how retained tPA expresses its enzymatic activity. Retained tPA effectively increased the lysine binding site–dependent binding of plasminogen on the cell surface and pericellular area; this was abolished by inhibition of enzymatic activity of either tPA or plasmin, which suggests that de novo generation of carboxyl-terminal lysine as a consequence of degradation of surface/pericellular proteins by plasmin is essential. Retained tPA initiated zonal clot lysis of a fibrin network that had been formed on vascular endothelial cells, which was preceded by the binding of plasminogen to the lysis front. Our results provide evidence that secreted and retained tPA is essential for maintaining both high fibrinolytic activity and effective clot lysis on the vascular endothelial cell surface.

Abstract 9483: High Mobility Group Box 1 Promotes Angiogenesis From Bone Marrow-Derived Endothelial Progenitor Cells After Myocardial Infarction

Circulation ◽  
2014 ◽  
Vol 130 (suppl_2) ◽  
Author(s):  
Yuichi Nakamura ◽  
Satoshi Suzuki ◽  
Takeshi Shimizu ◽  
Makiko Miyata ◽  
Tetsuro Shishido ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Bone Marrow ◽  
Endothelial Cells ◽  
Progenitor Cells ◽  
Endothelial Progenitor Cells ◽  
Vascular Endothelial Cells ◽  
High Mobility ◽  
High Mobility Group ◽  
Vascular Endothelial ◽  
Double Positive

Background: High mobility group box 1 (HMGB1) is a DNA-binding protein secreted into extracellular space from necrotic cells and acts as a cytokine. We have reported that HMGB1 attenuates cardiac damage and restores cardiac function by enhancing angiogenesis after myocardial infarction (MI). We examined the role of HMGB1 in angiogenesis from bone marrow (BM) -derived cells in the heart, using transgenic mice with cardiac-specific overexpression of HMGB1 (HMGB1-TG). Methods and Results: HMGB1-TG mice and wild-type littermate (WT) mice were lethally irradiated and injected with BM cells from green fluorescent protein (GFP) mice through the tail vein. Two weeks after BM transplantation, the left anterior descending artery was ligated to create MI. In flow cytometry analysis, GFP-positive cells were identified as donor BM cells-derived endothelial progenitor cells (EPC) if they were positive for both CD34 and CD144 in granulocyte differentiation antigen-1-negative fraction. Circulating EPC mobilized from BM was increased at 1 week after MI in HMGB1-TG mice compared with WT mice (41.9% vs. 24.5%, P < 0.01). Histological examination showed the size of MI was smaller in HMGB1-TG mice than in WT mice (42.9% vs. 59.1%, P < 0.01) at 4 weeks after MI. In myocardial immunofluorescence staining, GFP and CD31 double-positive cells were BM-derived cells engrafted within myocardial tissue as vascular endothelial cells of new capillaries or arterioles. The ratio of these double positive cells to all cardiac cells was significantly higher in the HMGB1-TG mice than in the WT mice (8.3% vs. 2.9%, P < 0.01). Enzyme-linked immunosorbent assay revealed that the levels of cardiac vascular endothelial growth factor at 1 week after MI were higher in HMGB1-TG mice than in WT mice (642.1 vs. 390.7 pg/dl, P < 0.05). Conclusions: The present study demonstrated the direct in vivo evidence that HMGB1 promoted angiogenesis and reduced MI size by enhancing mobilization and differentiation of BM cells to EPC, migration to the border zone of MI, and engraftment as vascular endothelial cells of new capillaries or arterioles in the infarcted heart.

Biomechanical interactions of Schistosoma mansoni eggs with vascular endothelial cells facilitate egg extravasation

2021 ◽  
Author(s):  
Yi-Ting Yeh ◽  
Danielle E. Skinner ◽  
Ernesto Criado-Hidalgo ◽  
Natalie Shee Chen ◽  
Antoni Garcia-De Herreros ◽  
...  
Keyword(s):  
Endothelial Cells ◽  
Schistosoma Mansoni ◽  
Disease Transmission ◽  
Vascular Endothelial Cells ◽  
Flexible Substrate ◽  
Blood Stream ◽  
The Body ◽  
Dependent Manner ◽  
Vascular Endothelial ◽  
Maturation State

AbstractThe eggs of the parasitic blood fluke, Schistosoma, are the main drivers of the chronic pathologies associated with schistosomiasis, a disease of poverty afflicting approximately 220 million people worldwide. Eggs laid by Schistosoma mansoni in the bloodstream of the host are encapsulated by vascular endothelial cells (VECs), the first step in the migration of the egg from the blood stream into the lumen of the gut and eventual exit from the body. The biomechanics associated with encapsulation and extravasation of the egg are poorly understood. We demonstrate that S. mansoni eggs induce VECs to form two types of membrane extensions during encapsulation; filopodia that probe eggshell surfaces and intercellular nanotubes that presumably facilitate VEC communication. Encapsulation efficiency, the number of filopodia and intercellular nanotubes, and the length of these structures depend on the egg’s vitality and, to a lesser degree, its maturation state. During encapsulation, live eggs induce VEC contractility and membranous structures formation, in a Rho/ROCK pathway-dependent manner. Using elastic hydrogels embedded with fluorescent microbeads as substrates to culture VECs, live eggs induce VECs to exert significantly greater contractile forces during encapsulation than dead eggs, which leads to 3D deformations on both the VEC monolayer and the flexible substrate underneath. These significant mechanical deformations cause the VEC monolayer tension to fluctuate with eventual rupture of VEC junctions, thus facilitating egg transit out of the blood vessel. Overall, our data on the mechanical interplay between host VECs and the schistosome egg improve our understanding of how this parasite manipulates its immediate environment to maintain disease transmission.

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