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https://www.readbyqxmd.com/read/27908642/negative-regulation-of-nlrp3-inflammasome-by-sirt1-in-vascular-endothelial-cells
#1
Yanxiang Li, Xiaofeng Yang, Yanhao He, Weirong Wang, Jiye Zhang, Wei Zhang, Ting Jing, Bo Wang, Rong Lin
NLRP3 inflammasome not only functions as a critical effector in innate immunity, but also triggers the production of proinflammatory cytokines involved in inflammation-associated diseases. Sirtuin 1 (SIRT1) plays an important role in the regulation of cellular inflammation. However, whether the activation of NLRP3 inflammasome is regulated by SIRT1 remains unknown. In this study, we investigated the regulatory effect of SIRT1 on NLRP3 inflammasome and the underlying mechanisms. We found that lipopolysaccharide (LPS) and adenosine triphosphate (ATP)-induced the activation of NLRP3 inflammasome in human umbilical vein endothelial cells (HUVECs)...
November 4, 2016: Immunobiology
https://www.readbyqxmd.com/read/27906619/effects-of-4-pyridone-3-carboxamide-1%C3%AE-d-ribonucleoside-on-adenine-nucleotide-catabolism-in-the-aortic-wall-implications-for-atherosclerosis-in-apoe-ldlr-mice
#2
Magdalena Zabielska, Barbara Kutryb-Zajac, Paulina Żukowska, Ewa Slominska, Ryszard Smoleński
: 4-Pyridone-3-carboxamide-1-beta-D-ribonucleoside (4PYR) is an endogenously produced nucleoside that had been identified as a substrate for intracellular phosphorylation to form intracellular nucleotides. Previous studies demonstrated that 4PYR adversely affects metabolism of endothelial cells that is known risk factor for atherosclerosis. The purpose of this study was to evaluate effects of 4PYR on the progression of atherosclerosis and changes in extracellular nucleotides degradation on the surface of the vessel wall in the murine model...
December 2016: Nucleosides, Nucleotides & Nucleic Acids
https://www.readbyqxmd.com/read/27881059/natural-products-with-antiplatelet-action
#3
Gabriela Elisa Hirsch, Paulo Ricardo Nazário Viecili, Amanda Spring de Almeida, Sabrina Nascimento, Fernando Garcez Porto, Juliana Otero, Aline Schmidt, Brenda da Silva, Mariana Migliorini Parisi, Jonatas Zeni Klafke
BACKGROUND: Complex hemostatic mechanisms are involved in the pathophysiology of various diseases, including cardiovascular diseases. Among them, dysregulation of platelet activity is linked to the progression of atherosclerosis and mainly involves platelet aggregation and a decrease in blood flow in the vascular endothelium. The major platelet activation pathways mediated by agonists involve the arachidonic acid pathway, adenosine diphosphate pathway, serotonin pathway, nitric oxide pathway, and action of free radicals on molecules involved in platelet aggregation...
November 23, 2016: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/27871900/insulin-adenosine-axis-linked-signalling
#4
REVIEW
Luis Silva, Mario Subiabre, Joaquín Araos, Tamara Sáez, Rocío Salsoso, Fabián Pardo, Andrea Leiva, Rody San Martín, Fernando Toledo, Luis Sobrevia
Regulation of blood flow depends on systemic and local release of vasoactive molecules such as insulin and adenosine. These molecules cause vasodilation by activation of plasma membrane receptors at the vascular endothelium. Adenosine activates at least four subtypes of adenosine receptors (A1AR, A2AAR, A2BAR, A3AR), of which A2AAR and A2BAR activation leads to increased cAMP level, generation of nitric oxide, and relaxation of the underlying smooth muscle cell layer. Vasodilation caused by adenosine also depends on plasma membrane hyperpolarization due to either activation of intermediate-conductance Ca(2+)-activated K(+) channels in vascular smooth muscle or activation of ATP-activated K(+) channels in the endothelium...
November 19, 2016: Molecular Aspects of Medicine
https://www.readbyqxmd.com/read/27856430/glycolysis-and-oxidative-phosphorylation-are-essential-for-purinergic-receptor-mediated-angiogenic-responses-in-vasa-vasorum-endothelial-cells
#5
Martin Lapel, Philip Weston, Derek Strassheim, Vijaya Karoor, Nana Burns, Taras Lyubchenko, Petr Paucek, Kurt R Stenmark, Evgenia V Gerasimovskaya
Angiogenesis is an energy demanding process, however, the role of cellular energy pathways and their regulation by extracellular stimuli, especially extracellular nucleotides, remain largely unexplored. Using metabolic inhibitors of glycolysis (2-deoxyglucose, 2-DG) and oxidative phosphorylation (oligomycin, rotenone, and FCCP) we demonstrate that glycolysis and OXPHOS are both essential for angiogenic responses of vasa vasorum endothelial cell (VVEC). Treatment with P2R agonists, ATP and MeSADP, but not P1 receptor agonist, adenosine, increased glycolytic activity in VVEC (measured by extracellular acidification rate and lactate production)...
November 16, 2016: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/27823883/oligonucleotide-transition-state-analogues-of-saporin-l3
#6
Jennifer M Mason, Hongling Yuan, Gary B Evans, Peter C Tyler, Quan Du, Vern L Schramm
Ribosome inactivating proteins (RIPs) are among the most toxic agents known. More than a dozen clinical trials against refractory cancers have been initiated using modified RIPs with impressive results. However, dose-limiting toxicity due to vascular leak syndrome limits success of the therapy. We have previously reported some tight-binding transition state analogues of Saporin L3 that mimic small oligonucleotide substrates in which the susceptible adenosine has been replaced by a 9-deazaadenyl hydroxypyrrolidinol derivative...
October 27, 2016: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/27821588/smooth-muscle-cell-pro-angiogenic-phenotype-induced-by-cyclopentenyl-cytosine-promotes-endothelial-cell-proliferation-and-migration
#7
Rui Tang, Gui Zhang, Shi-You Chen
Vascular smooth muscle cells (SMCs) and endothelial cells (ECs) have a close contact with the blood vessel. SMC phenotypes can be altered during pathological vascular remodeling. However, how SMC phenotypes affect EC properties remain largely unknown. In the present study, we found that platelet-derived growth factor (PDGF)-BB-induced synthetic SMC suppressed EC proliferation and migration while exhibiting an increased expression of anti-angiogenic factors such as endostatin and decreased pro-angiogenic factors including C-X-C motif ligand 1 (CXCL1)...
November 7, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27821575/vasculo-neuronal-coupling-retrograde-vascular-communication-to-brain-neurons
#8
Ki Jung Kim, Juan Ramiro Diaz, Jennifer A Iddings, Jessica A Filosa
: Continuous cerebral blood flow is essential for neuronal survival, but whether vascular tone influences resting neuronal function is not known. Using a multidisciplinary approach in both rat and mice brain slices, we determined if flow/pressure-evoked increases or decreases in parenchymal arteriole vascular tone which result in arteriole constriction and dilation, respectively altered resting cortical pyramidal neuron activity. We present evidence for intercellular communication in the brain involving a flow of information from vessel-to-astrocyte-to neuron, a direction opposite to that of classic neurovascular coupling and referred here as vasculo-neuronal coupling (VNC)...
November 7, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27813476/ad%C3%A3-nylyl-cyclases-et-transdiff%C3%A3-renciation-des-cellules-musculaires-lisses-vasculaires-r%C3%A3-le-dans-le-remodelage-vasculaire-pathologique
#9
Marie Gueguen, Benjamin Vallin, Martine Glorian, Régis Blaise, Isabelle Limon
In response to various types of vascular stress, the smooth muscle cells of the vessel wall (VSMCs) change phenotype and acquire the capacity to react to abnormal signals. This phenomenon favors the involvement of these cells in the development of major vascular diseases, such as atherosclerosis, and some complications of angioplasty, such as restenosis. The cyclic adenosine monophosphate (cAMP) pathway plays a key role in the integration of stimuli from the immediate environment and in the development of cellular responses...
2016: Biologie Aujourd'hui
https://www.readbyqxmd.com/read/27801365/oxidative-stress-parameters-and-inflammatory-and-immune-mediators-as-markers-of-the-severity-of-sepsis
#10
Isil Bavunoglu, Habibe Genc, Dildar Konukoglu, Hayriye Cicekci, Volkan Sozer, Remise Gelisgen, Hafize Uzun
INTRODUCTION: Sepsis is a complex inflammatory syndrome with diverse etiology and wide spectrum of severity. The aim of this study was to investigate whether inflammatory mediators, in comparison with oxidative parameters, are associated with severity of sepsis. METHODOLOGY: Plasma neopterin, adenosine deaminase (ADA), vascular cell adhesion molecule (VCAM), intracellular adhesion molecule (ICAM), interleukin (IL)-1, IL-6, and tumor necrosis factor alpha (TNF-α), as inflammatory mediators, and serum nitric oxide (NOx), nitrotyrosine (NT), oxidized LDL (oxLDL) levels, serum paraoxonase 1 (PON1) activity, and erythrocyte glutathione (GSH) levels as oxidative stress parameters of 12 patients with mild sepsis, 25 patients with severe sepsis, and 20 healthy control subjects were evaluated...
October 31, 2016: Journal of Infection in Developing Countries
https://www.readbyqxmd.com/read/27789557/the-dogged-search-for-cryptic-effects-of-ticagrelor-wishful-thinking-or-real-benefits-beyond-p2y12-inhibition
#11
EDITORIAL
Paul A Gurbel, Young-Hoon Jeong, Udaya S Tantry
No abstract text is available yet for this article.
November 29, 2016: Circulation
https://www.readbyqxmd.com/read/27788477/effect-of-dietary-supplementation-of-padauk-pterocarpus-soyauxii-leaf-on-high-fat-diet-streptozotocin-induced-diabetes-in-rats-brain-and-platelets
#12
Jamiyu A Saliu, Ganiyu Oboh, Olasunkanmi S Omojokun, João B T Rocha, Maria R Schetinger, Jessie Guterries, Naiara Stefanello, Fabiano Carvalho, Roberta Schmatz, Vera M Morsch, Aline Boligon
BACKGROUND: This study investigated the effects of Padauk leaf on brain malondialdehyde (MDA) content, acetylcholinesterase (AChE) activities, ectonucleotidases and adenosine deaminase (ADA) activities in the platelet of high fat diet and streptozotocin (STZ)-induced diabetic rats. METHODS: The animals were divided into six groups (n=7): normal control rats; diabetic rats+high fat diet (HFD); diabetic rats+HFD+Metformin; diabetic rats+HFD+acarbose; diabetic rats+HFD+10% Padauk leaf; normal rats+basal diet+10% Padauk leaf...
October 24, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27780585/purinergic-signaling-in-kidney-disease
#13
REVIEW
Robert I Menzies, Frederick W Tam, Robert J Unwin, Matthew A Bailey
Nucleotides are key subunits for nucleic acids and provide energy for intracellular metabolism. They can also be released from cells to act physiologically as extracellular messengers or pathologically as danger signals. Extracellular nucleotides stimulate membrane receptors in the P2 and P1 family. P2X are ATP-activated cation channels; P2Y and P1 are G-protein coupled receptors activated by ATP, ADP, UTP, and UDP in the case of P2 or adenosine for P1. Renal P2 receptors influence both vascular contractility and tubular function...
October 22, 2016: Kidney International
https://www.readbyqxmd.com/read/27779654/overlapping-molecular-pathways-between-cannabinoid-receptors-type%C3%A2-1-and%C3%A2-2-and-estrogens-androgens-on-the-periphery-and-their-involvement-in-the-pathogenesis-of-common-diseases%C3%A2-review
#14
Luka Dobovišek, Marko Hojnik, Polonca Ferk
The physiological and pathophysiological roles of sex hormones have been well documented and the modulation of their effects is applicable in many current treatments. On the other hand, the physiological role of endocannabinoids is not yet clearly understood and the endocannabinoid system is considered a relatively new therapeutic target. The physiological association between sex hormones and cannabinoids has been investigated in several studies; however, its involvement in the pathophysiology of common human diseases has been studied separately...
October 17, 2016: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/27749555/overexpression-of-cd39-in-hepatocellular-carcinoma-is-an-independent-indicator-of-poor-outcome-after-radical-resection
#15
Xiao-Yan Cai, Xiao-Chun Ni, Yong Yi, Hong-Wei He, Jia-Xing Wang, Yi-Peng Fu, Jian Sun, Jian Zhou, Yun-Feng Cheng, Jian-Jun Jin, Jia Fan, Shuang-Jian Qiu
Nucleoside triphosphate diphosphohydrolase-1 (ENTPD1/CD39) is the rate-limiting enzyme in a cascade leading to the generation of immunosuppressive adenosine and plays an important role in tumor progression. This study aimed to evaluate the expression of CD39 and CD39Foxp3 regulatory T cells (Tregs) and to determine their prognostic role in patients with hepatocellular carcinoma (HCC) after radical resection.Immunohistochemistry (IHC) and double IHC were used to analyze CD39 expression or the expression of CD39 and Foxp3 in a cohort of 324 HCC patients who underwent curative resection...
October 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27741282/breathing-maneuvers-as-a-vasoactive-stimulus-for-detecting-inducible-myocardial-ischemia-an-experimental-cardiovascular-magnetic-resonance-study
#16
Kady Fischer, Dominik P Guensch, Nancy Shie, Julie Lebel, Matthias G Friedrich
BACKGROUND: Breathing maneuvers can elicit a similar vascular response as vasodilatory agents like adenosine; yet, their potential diagnostic utility in the presence of coronary artery stenosis is unknown. The objective of the study is to investigate if breathing maneuvers can non-invasively detect inducible ischemia in an experimental animal model when the myocardium is imaged with oxygenation-sensitive cardiovascular magnetic resonance (OS-CMR). METHODS AND FINDINGS: In 11 anesthetised swine with experimentally induced significant stenosis (fractional flow reserve <0...
2016: PloS One
https://www.readbyqxmd.com/read/27740874/current-controversies-in-the-use-of-aspirin-and-ticagrelor-for-the-treatment-of-thrombotic-events
#17
Aung Myat, Udaya S Tantry, Jacek Kubica, Paul A Gurbel
A P2Y12 inhibitor plus aspirin is the most widely used antiplatelet strategy to prevent adverse outcomes in the setting of atherothrombotic vascular disease. Areas covered: A paucity of robust evidence for an optimal dose, gastrointestinal toxicity, ineffectiveness in high-risk patients and interactions with other antiplatelet agents, are major controversies associated with aspirin therapy. Ticagrelor is a reversibly binding oral P2Y12 receptor blocker that mediates potent inhibition of adenosine diphosphate-induced platelet function...
December 2016: Expert Review of Cardiovascular Therapy
https://www.readbyqxmd.com/read/27737734/bronchodilator-inhalation-during-ex%C3%A2-vivo-lung-perfusion-improves-posttransplant-graft-function-after-warm-ischemia
#18
Kyoko Hijiya, Toyofumi F Chen-Yoshikawa, Takeshi Kondo, Hideki Motoyama, Akihiro Ohsumi, Daisuke Nakajima, Jin Sakamoto, Keiji Ohata, Mamoru Takahashi, Satona Tanaka, Ei Miyamoto, Akihiro Aoyama, Hiroshi Date
BACKGROUND: We hypothesized that an injured lung graft from donation after cardiac death donors could be reconditioned before transplantation using an ex vivo lung perfusion (EVLP) system and ventilation with high-dose short-acting β2-adrenergic receptor agonists. METHODS: Cardiac arrest was induced in a canine model by intravenous potassium chloride injection. Lungs were randomly assigned to two groups after 150 minutes of warm ischemia: inhalation of 1,400 μg of procaterol (BETA group, n = 5) or control group receiving solvent (CON group, n = 5) during EVLP...
October 10, 2016: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/27732656/soluble-cd73-in-critically-ill-septic-patients-data-from-the-prospective-finnaki-study
#19
Suvi T Vaara, Maija Hollmén, Anna-Maija Korhonen, Mikael Maksimow, Tero Ala-Kokko, Marko Salmi, Sirpa Jalkanen, Ville Pettilä
BACKGROUND: CD73 dephosphorylates adenosine monophosphate to adenosine that is an anti-inflammatory molecule inhibiting immune activation and vascular leakage. Therefore, CD73 could be an interesting mediator both in sepsis and acute kidney injury (AKI). We aimed to explore the soluble CD73 (sCD73) levels and their evolution in critically ill patients with severe sepsis and, second, to scrutinize the potential association of sCD73 levels with AKI and 90-day mortality. METHODS: This was a post-hoc laboratory analysis of the prospective, observational FINNAKI study conducted in 17 Finnish ICU during 5 months in 2011-2012...
2016: PloS One
https://www.readbyqxmd.com/read/27703477/early-intervention-of-didang-decoction-on-mlck-signaling-pathways-in-vascular-endothelial-cells-of-type-2-diabetic-rats
#20
Shoujiao Ye, Zhenqiang Song, Jing Li, Chunshen Li, Juhong Yang, Bai Chang
In the study, type 2 diabetic rat model was established using streptozotocin (STZ) combined with a high-fat diet, and the rats were divided into control and diabetic groups. Diabetic groups were further divided into nonintervening, simvastatin, Didang Decoction (DDD) early-phase intervening, DDD mid-phase intervening, and DDD late-phase intervening groups. The expression level of MLCK was detected using Western Blot analysis, and the levels of cyclic adenosine monophosphate (cAMP), protein kinase C (PKC), and protein kinase A (PKA) were examined using Real Time PCR...
2016: International Journal of Endocrinology
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