scholarly journals A zinc complex that suppresses the expression of a reactive sulfur species-producing enzyme, cystathionine γ-lyase, in cultured vascular endothelial cells

2018 ◽  
Vol 5 (6) ◽  
pp. 181-184
Author(s):  
Akane Takahashi ◽  
Musubu Takahashi ◽  
Tomoya Fujie ◽  
Takato Hara ◽  
Eiko Yoshida ◽  
...  
Keyword(s):  
Endothelial Cells ◽  
Zinc Complex ◽  
Vascular Endothelial Cells ◽  
Vascular Endothelial ◽  
Sulfur Species ◽  
Reactive Sulfur Species

scholarly journals Transcriptional Induction of Cystathionine γ-Lyase, a Reactive Sulfur-Producing Enzyme, by Copper Diethyldithiocarbamate in Cultured Vascular Endothelial Cells

2020 ◽  
Vol 21 (17) ◽  
pp. 6053
Author(s):  
Tomoya Fujie ◽  
Akane Takahashi ◽  
Musubu Takahashi ◽  
Takato Hara ◽  
Asuka Soyama ◽  
...  
Keyword(s):  
Endothelial Cells ◽  
Intracellular Signaling ◽  
Vascular Endothelial Cells ◽  
Toxic Substances ◽  
Vascular Endothelial ◽  
Sulfur Species ◽  
Intracellular Signaling Pathways ◽  
Reactive Sulfur Species ◽  
Copper Diethyldithiocarbamate ◽  
Transcriptional Induction

As toxic substances can enter the circulating blood and cross endothelial monolayers to reach parenchymal cells in organs, vascular endothelial cells are an important target compartment for such substances. Reactive sulfur species protect cells against oxidative stress and toxic substances, including heavy metals. Reactive sulfur species are produced by enzymes, such as cystathionine γ-lyase (CSE), cystathionine β-synthase, 3-mercaptopyruvate sulfurtransferase, and cysteinyl-tRNA synthetase. However, little is known about the regulatory mechanisms underlying the expression of these enzymes in vascular endothelial cells. Bio-organometallics is a research field that analyzes biological systems using organic-inorganic hybrid molecules (organometallic compounds and metal coordinating compounds) as molecular probes. In the present study, we analyzed intracellular signaling pathways that mediate the expression of reactive sulfur species-producing enzymes in cultured bovine aortic endothelial cells, using copper diethyldithiocarbamate (Cu10). Cu10 selectively upregulated CSE gene expression in vascular endothelial cells independent of cell density. This transcriptional induction of endothelial CSE required both the diethyldithiocarbamate scaffold and the coordinated copper ion. Additionally, the present study revealed that ERK1/2, p38 MAPK, and hypoxia-inducible factor (HIF)-1α/HIF-1β pathways mediate transcriptional induction of endothelial CSE by Cu10. The transcription factors NF-κB, Sp1, and ATF4 were suggested to act in constitutive CSE expression, although the possibility that they are involved in the CSE induction by Cu10 cannot be excluded. The present study used a copper complex as a molecular probe to reveal that the transcription of CSE is regulated by multiple pathways in vascular endothelial cells, including ERK1/2, p38 MAPK, and HIF-1α/HIF-1β. Bio-organometallics appears to be an effective strategy for analyzing the functions of intracellular signaling pathways in vascular endothelial cells.

scholarly journals Synthesis of Reactive Sulfur Species in Cultured Vascular Endothelial Cells after Exposure to TGF-β1: Induction of Cystathionine γ-Lyase and Cystathionine β-Synthase Expression Mediated by the ALK5-Smad2/3/4 and ALK5-Smad2/3-ATF4 Pathways

2021 ◽  
Vol 22 (21) ◽  
pp. 11762
Author(s):  
Musubu Takahashi ◽  
Tomoya Fujie ◽  
Tsuyoshi Nakano ◽  
Takato Hara ◽  
Yasuhiro Shinkai ◽  
...  
Keyword(s):  
Cell Proliferation ◽  
Endothelial Cells ◽  
Endothelial Cell ◽  
Molecular Mass ◽  
Vascular Endothelial Cells ◽  
Vascular Endothelial Cell ◽  
High Molecular Mass ◽  
Vascular Endothelial ◽  
Sulfur Species ◽  
Tgf Β1

Transforming growth factor-β1 (TGF-β1) occurs at high levels at damage sites of vascular endothelial cell layers and regulates the functions of vascular endothelial cells. Reactive sulfur species (RSS), such as cysteine persulfide, glutathione persulfide, and hydrogen persulfide, are cytoprotective factors against electrophiles such as reactive oxygen species and heavy metals. Previously, we reported that sodium trisulfide, a sulfane sulfur donor, promotes vascular endothelial cell proliferation. The objective of the present study was to clarify the regulation and significance of RSS synthesis in vascular endothelial cells after exposure to TGF-β1. Bovine aortic endothelial cells in a culture system were treated with TGF-β1 to assess the expression of intracellular RSS, the effect of RSS on cell proliferation in the presence of TGF-β1, induction of RSS-producing enzymes by TGF-β1, and intracellular signal pathways that mediate this induction. The results suggest that TGF-β1 increased intracellular RSS levels to modulate its inhibitory effect on proliferation. The increased production of RSS, probably high-molecular-mass RSS, was due to the induction of cystathionine γ-lyase and cystathionine β-synthase, which are RSS-producing enzymes, and the induction was mediated by the ALK5-Smad2/3/4 and ALK5-Smad2/3-ATF4 pathways in vascular endothelial cells. TGF-β1 regulates vascular endothelial cell functions such as proliferation and fibrinolytic activity; intracellular high-molecular-mass RSS, which are increased by TGF-β1, may modulate the regulation activity in vascular endothelial cells.

The Endothelial Cell and the Factor VIII Bypassing Activity of Prothrombin Complex Concentrate

1988 ◽  
Vol 60 (02) ◽  
pp. 226-229 ◽  
Author(s):  
Jerome M Teitel ◽  
Hong-Yu Ni ◽  
John J Freedman ◽  
M Bernadette Garvey
Keyword(s):  
Endothelial Cells ◽  
Endothelial Cell ◽  
Factor Viii ◽  
Prothrombin Complex Concentrate ◽  
Vascular Endothelial Cells ◽  
Vascular Endothelial ◽  
Monolayer Cultures ◽  
Coagulant Activity ◽  
Time Courses ◽  
Privileged Site

SummarySome classical hemophiliacs have a paradoxical hemostatic response to prothrombin complex concentrate (PCC). We hypothesized that vascular endothelial cells (EC) may contribute to this “factor VIII bypassing activity”. When PCC were incubated with suspensions or monolayer cultures of EC, they acquired the ability to partially bypass the defect of factor VIII deficient plasma. This factor VIII bypassing activity distributed with EC and not with the supernatant PCC, and was not a general property of intravascular cells. The effect of PCC was even more dramatic on fixed EC monolayers, which became procoagulant after incubation with PCC. The time courses of association and dissociation of the PCC-derived factor VIII bypassing activity of fixed and viable EC monolayers were both rapid. We conclude that EC may provide a privileged site for sequestration of constituents of PCC which express coagulant activity and which bypass the abnormality of factor VIII deficient plasma.

Alterations in Vascular Endothelial Cell-related Plasma Proteins In Thalassaemic Patients and their Correlation with Clinical Symptoms

1995 ◽  
Vol 74 (04) ◽  
pp. 1045-1049 ◽  
Author(s):  
P Butthep ◽  
A Bunyaratvej ◽  
Y Funahara ◽  
H Kitaguchi ◽  
S Fucharoen ◽  
...  
Keyword(s):  
Endothelial Cells ◽  
Endothelial Cell ◽  
Immunosorbent Assay ◽  
Plasma Proteins ◽  
Clinical Symptoms ◽  
Vascular Endothelial Cells ◽  
Vascular Endothelial Cell ◽  
Enzyme Linked Immunosorbent Assay ◽  
Vascular Endothelial ◽  
Leg Ulcers

SummaryAn increased level of plasma thrombomodulin (TM) in α- and β- thalassaemia was demonstrated using an enzyme-linked immunosorbent assay (ELISA). Nonsplenectomized patients with β-thalassaemia/ haemoglobin E (BE) had higher levels of TM than splenectomized cases (BE-S). Patients with leg ulcers (BE-LU) were found to have the highest increase in TM level. Appearance of larger platelets in all types of thalassaemic blood was observed indicating an increase in the number of younger platelets. These data indicate that injury of vascular endothelial cells is present in thalassaemic patients.

Actions of Liraglutide on Vascular Endothelial Cells Play a Central Role in the Suppression of Atherosclerosis in Diabetic Mice

Diabetes ◽  
2018 ◽  
Vol 67 (Supplement 1) ◽  
pp. 487-P
Author(s):  
MUNENORI HIROMURA ◽  
YUSAKU MORI ◽  
MASAKAZU KOSHIBU ◽  
HIDEKI KUSHIMA ◽  
KYOKO KOHASHI ◽  
...  
Keyword(s):  
Endothelial Cells ◽  
Vascular Endothelial Cells ◽  
Vascular Endothelial ◽  
Diabetic Mice

ROCK2 Regulates the Expression of Cell Adhesion Molecules and Cell-to-Cell Adhesion in Vascular Endothelial Cells

Diabetes ◽  
2018 ◽  
Vol 67 (Supplement 1) ◽  
pp. 476-P
Author(s):  
YUSUKE TAKEDA ◽  
KEIICHIRO MATOBA ◽  
DAIJI KAWANAMI ◽  
YOSUKE NAGAI ◽  
TOMOYO AKAMINE ◽  
...  
Keyword(s):  
Endothelial Cells ◽  
Cell Adhesion ◽  
Adhesion Molecules ◽  
Cell Adhesion Molecules ◽  
Vascular Endothelial Cells ◽  
Vascular Endothelial ◽  
Cell To Cell Adhesion

Intracellular mechanisms involved in D-glucose-mediated amplification of agonist-induced Ca2+ response and EDRF formation in vascular endothelial cells

Diabetes ◽  
1994 ◽  
Vol 43 (8) ◽  
pp. 984-991 ◽  
Author(s):  
T. C. Wascher ◽  
H. Toplak ◽  
G. J. Krejs ◽  
S. Simecek ◽  
W. R. Kukovetz ◽  
...  
Keyword(s):  
Endothelial Cells ◽  
Vascular Endothelial Cells ◽  
Vascular Endothelial ◽  
Intracellular Mechanisms
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