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https://www.readbyqxmd.com/read/28204209/prolonging-hypothermic-ischaemic-cardiac-and-vascular-storage-by-inhibiting-the-activation-of-the-nuclear-enzyme-poly-adenosine-diphosphate-ribose-polymerase
#1
Sevil Korkmaz-Icöz, Tamás Radovits, Sivakkanan Loganathan, Shiliang Li, Mihály Ruppert, Kálmán Benke, Paige Brlecic, Csaba Szabó, Matthias Karck, Gábor Szabó
No abstract text is available yet for this article.
February 13, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28198766/the-differential-effect-of-apyrase-treatment-and-hcd39-overexpression-on-chronic-renal-fibrosis-following-ischemia-reperfusion-injury
#2
Veena Roberts, Duncan J Campbell, Bo Lu, Joanne Chia, Peter J Cowan, Karen M Dwyer
BACKGROUND: Renal ischemia reperfusion injury (IRI) leads to acute kidney injury and renal fibrosis. CD39 is a key purinergic enzyme in the hydrolysis of ATP and increased CD39 enzymatic activity protects from acute IRI but its effect on renal fibrosis is not known. METHODS: Using a mouse model of unilateral renal IRI, the effects of increased CD39 activity (using soluble apyrase and mice expressing human CD39 transgene) on acute and chronic renal outcomes were examined...
February 14, 2017: Transplantation
https://www.readbyqxmd.com/read/28194663/cilostazol-use-is-associated-with-reduced-risk-of-dementia-a-nationwide-cohort-study
#3
Shu-Yu Tai, Chen-Yu Chien, Yu-Han Chang, Yuan-Han Yang
Whether antiplatelet agents have a preventive effect on cognitive function remains unknown. We examined the potential association between the use of cilostazol, an antiplatelet agent and cyclic adenosine monophosphate phosphodiesterase 3 inhibitor, and the risk of dementia in an Asian population. Patients initiating cilostazol therapy between 1 January 2004 and 31 December 2009 without a prior history of dementia were identified from Taiwan's National Health Insurance database. Participants were stratified by age, sex, comorbidities, and comedication...
February 13, 2017: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
https://www.readbyqxmd.com/read/28183862/the-mechanisms-underlying-the-muscle-metaboreflex-modulation-of-sweating-and-cutaneous-blood-flow-in-passively-heated-humans
#4
Baies Haqani, Naoto Fujii, Narihiko Kondo, Glen P Kenny
Metaboreceptors can modulate cutaneous blood flow and sweating during heat stress but the mechanisms remain unknown. Fourteen participants (31 ± 13 years) performed 1-min bout of isometric handgrip (IHG) exercise at 60% of their maximal voluntary contraction followed by a 3-min occlusion (OCC), each separated by 10 min, initially under low (LHS, to activate sweating without changes in core temperature) and high (HHS, whole-body heating to a core temperature increase of 1.0°C) heat stress conditions. Cutaneous vascular conductance (CVC) and sweat rate were measured continuously at four forearm skin sites perfused with 1) lactated Ringer's solution (Control), 2) 10 mmol L-NAME [inhibits nitric oxide synthase (NOS)], 3) 10 mmol Ketorolac [inhibits cyclooxygenase (COX)], or 4) 4 mmol theophylline (THEO; inhibits adenosine receptors)...
February 2017: Physiological Reports
https://www.readbyqxmd.com/read/28170537/adenosine-deaminase-2-induced-hyperpermeability-in-human-retinal-vascular-endothelial-cells-is-suppressed-by-microrna-146b-3p
#5
Yara A Samra, Heba M Saleh, Khaled A Hussein, Nehal M Elsherbiny, Ahmed S Ibrahim, Khaled Elmasry, Sadanand Fulzele, Mamdouh M El-Shishtawy, Laila A Eissa, Mohamed Al-Shabrawey, Gregory I Liou
Purpose: We recently demonstrated that adenosine deaminase-2 (ADA2) contributes to diabetic retinopathy (DR) via up-regulating the production of inflammatory cytokines in macrophages. Also, microRNA (miR)-146b-3p has the ability to inhibit ADA2. The goal of this study was to investigate the potential role of ADA2 and therapeutic benefit of miR-146b-3p in retinal inflammation and endothelial barrier dysfunction during diabetes. Methods: Adenosine deaminase-2 activity was determined by colorimetric method in diabetic human vitreous...
February 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28153452/adenosine-receptors-modulators-of-lipid-availability-that-are-controlled-by-lipid-levels
#6
REVIEW
Andrea Leiva, Enrique Guzmán-Gutiérrez, Susana Contreras-Duarte, Bárbara Fuenzalida, Claudette Cantin, Lorena Carvajal, Rocío Salsoso, Jaime Gutiérrez, Fabián Pardo, Luis Sobrevia
Adenosine as well as agonists and antagonists for the four adenosine receptor subtypes (A1R, A2AR, A2BR and A3R) play a role in several key physiological and pathophysiological processes, including the regulation of vascular tone, thrombosis, immune response, inflammation, and angiogenesis. This review focuses on the adenosine-mediated regulation of lipid availability in the cell and in the systemic circulation as well in humans and animal models. Therefore, adenosine, mainly by acting on A1R, inhibits lipolysis activity, leading to reduction of the circulating fatty acid levels...
January 30, 2017: Molecular Aspects of Medicine
https://www.readbyqxmd.com/read/28134997/mass-transport-circulatory-system-with-emphasis-on-nonendothermic-species
#7
Dane A Crossley, Warren W Burggren, Carl L Reiber, Jordi Altimiras, Kenneth J Rodnick
Mass transport can be generally defined as movement of material matter. The circulatory system then is a biological example given its role in the movement in transporting gases, nutrients, wastes, and chemical signals. Comparative physiology has a long history of providing new insights and advancing our understanding of circulatory mass transport across a wide array of circulatory systems. Here we focus on circulatory function of nonmodel species. Invertebrates possess diverse convection systems; that at the most complex generate pressures and perform at a level comparable to vertebrates...
December 6, 2016: Comprehensive Physiology
https://www.readbyqxmd.com/read/28109322/adar1-overexpression-is-associated-with-cervical-cancer-progression-and-angiogenesis
#8
Ying Chen, He Wang, Wenyi Lin, Ping Shuai
BACKGROUND: This study aimed to assess the role of RNA-dependent adenosine deaminase (ADAR1) in cervical squamous cell carcinoma occurrence and progression. METHODS: ADAR1 expression levels in stage IA and stage IIA cervical squamous cell carcinoma (group A), cervical intraepithelial neoplasia (CIN) specimens (group B), as well as normal and inflamed cervical tissue samples (group C) were assessed by immunohistochemistry. Clinical and pathological data of cervical squamous cell carcinoma patients undergoing surgery were retrospectively evaluated...
January 21, 2017: Diagnostic Pathology
https://www.readbyqxmd.com/read/28088487/adenosine-receptors-and-caffeine-in-retinopathy-of-prematurity
#9
REVIEW
Jiang-Fan Chen, Shuya Zhang, Rong Zhou, Zhenlang Lin, Xiaohong Cai, Jing Lin, Yuqing Huo, Xiaoling Liu
Retinopathy of prematurity (ROP) is a major cause of childhood blindness in the world and is caused by oxygen-induced damage to the developing retinal vasculature, resulting in hyperoxia-induced vaso-obliteration and subsequent delayed retinal vascularization and hypoxia-induced pathological neovascularization driven by vascular endothelial growth factor (VEGF) signaling pathway in retina. Current anti-VEGF therapy has shown some effective in a clinical trial, but is associated with the unintended effects on delayed eye growth and retinal vasculature development of preterm infants...
January 11, 2017: Molecular Aspects of Medicine
https://www.readbyqxmd.com/read/28079982/recombinant-soluble-apyrase-apt102-inhibits-thrombosis-and-intimal-hyperplasia-in-vein-grafts-without-adversely-affecting-hemostasis-or-re-endothelialization
#10
Y Ji, O Adeola, T L Strawn, S S Jeong, R Chen, W P Fay
BACKGROUND: Occlusion of vein grafts (VGs) after bypass surgery due to thrombosis and intimal hyperplasia (IH) is a major clinical problem. Apyrases are enzymes that scavenge extracellular ATP and ADP and promote adenosine formation at sites of vascular injury and hence have potential to inhibit vein graft pathology. OBJECTIVES: We examined the effects of recombinant soluble human apyrase, APT102, on platelets, smooth muscle cells (SMCs), and endothelial cells (ECs) in vitro and thrombosis and IH in murine VGs...
January 12, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28073290/intra-and-interorgan-communication-in-the-cardiovascular-system-a-special-view-on-redox-regulation
#11
Axel Gödecke, Judith Haendeler
Intraorgan communication in the cardiovascular system is exerted not only by direct cell-cell contacts but also by locally released factors, which modulate neighboring cells by paracrine signals (e.g., NO, vascular endothelial growth factor, adenosine, reactive oxygen species). Moreover, cells in close proximity to the typical cardiovascular cells such as fibroblasts, red blood cells, as well as resident and invading immune cells must be considered in attempts to understand cardiovascular function in physiology and pathology...
February 7, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28065166/the-predictive-capabilities-of-a-novel-cardiovascular-magnetic-resonance-derived-marker-of-cardiopulmonary-reserve-on-established-prognostic-surrogate-markers-in-patients-with-pulmonary-vascular-disease-results-of-a-longitudinal-pilot-study
#12
Timothy J Baillie, Samuel Sidharta, Peter M Steele, Stephen G Worthley, Scott Willoughby, Karen Teo, Prashanthan Sanders, Stephen J Nicholls, Matthew I Worthley
BACKGROUND: No unified method exists to effectively predict and monitor progression of pulmonary arterial hypertension (PAH). We assessed the longitudinal relationship between a novel marker of cardiopulmonary reserve and established prognostic surrogate markers in patients with pulmonary vascular disease. METHODS AND RESULTS: Twenty participants with confirmed (n = 14) or at high risk (n = 6) for PAH underwent cardiovascular magnetic resonance (CMR) at baseline and after ~6 months of guideline-appropriate management...
January 9, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28049018/transactivation-of-the-epidermal-growth-factor-receptor-in-responses-to-myocardial-stress-and-cardioprotection
#13
REVIEW
Melissa E Reichelt, Shannon O'Brien, Walter G Thomas, John P Headrick
The epidermal growth factor receptor (EGFR) family comprises the ErbB1 (EGFR) and ErbB4 receptors as well as the 'co-receptors' ErbB2 (which does not bind EGF ligands) and ErbB3 (which lack tyrosine kinase activity). This family of receptors is essential for cardiac development, myocardial, renal and vascular function, and cardiac responses to physiological and pathological perturbations. The EGFR appears critical in protecting cardiac cells from injury, while considerable attention has focussed on neuregulin/ErbB4 signalling in potentially ameliorating cardiomyopathy/heart failure...
December 31, 2016: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/28038380/the-p2y2-nucleotide-receptor-is-an-inhibitor-of-vascular-calcification
#14
Shaomin Qian, Jenna N Regan, Maxwell T Shelton, April Hoggatt, Khalid S Mohammad, Paul B Herring, Cheikh I Seye
BACKGROUND AND AIMS: Mutations in the 5'-nucleotidase ecto (NT5E) gene that encodes CD73, a nucleotidase that converts AMP to adenosine, are linked to arterial calcification. However, the role of purinergic receptor signaling in the pathology of intimal calcification is not well understood. In this study, we examined whether extracellular nucleotides acting via P2Y2 receptor (P2Y2R) modulate arterial intimal calcification, a condition highly correlated with cardiovascular morbidity. METHODS: Apolipoprotein E, P2Y2R double knockout mice (ApoE(-/-)P2Y2R(-/-)) were used to determine the effect of P2Y2R deficiency on vascular calcification in vivo...
December 15, 2016: Atherosclerosis
https://www.readbyqxmd.com/read/28034895/impaired-aortic-contractility-to-uridine-adenosine-tetraphosphate-in-angiotensin-ii-induced-hypertensive-mice-receptor-desensitization
#15
Zhichao Zhou, Vishal R Yadav, Changyan Sun, Bunyen Teng, Jamal S Mustafa
OBJECTIVE: We previously showed that uridine adenosine tetraphosphate (Up4A)-mediated aortic contraction is partly mediated through purinergic P2X1 receptors (P2X1R). It has been reported that the plasma level of Up4A is elevated in hypertensive patients, implying a potential role for Up4A-P2X1R signaling in hypertension. This study investigated the vasoactive effect of Up4A in aortas isolated from angiotensin (Ang) II-infused (21 days) hypertensive mice. METHODS: Blood pressure was measured by tail cuff plethysmography...
December 29, 2016: American Journal of Hypertension
https://www.readbyqxmd.com/read/28033029/higher-platelet-reactivity-and-platelet-monocyte-complex-formation-in-gram-positive-sepsis-compared-to-gram-negative-sepsis
#16
Rahajeng N Tunjungputri, Wouter van de Heijden, Rolf T Urbanus, Philip G de Groot, Andre van der Ven, Quirijn de Mast
Platelets may play a role in the high risk for vascular complications in Gram-positive sepsis. We compared the platelet reactivity of 15 patients with Gram-positive sepsis, 17 with Gram-negative sepsis and 20 healthy controls using a whole blood flow cytometry-based assay. Patients with Gram-positive sepsis had the highest median fluorescence intensity (MFI) of the platelet membrane expression of P-selectin upon stimulation with high dose adenosine diphosphate (ADP; P = 0.002 vs. Gram-negative and P = 0.005 vs...
December 29, 2016: Platelets
https://www.readbyqxmd.com/read/28024309/stroke-as-initial-manifestation-of-adenosine-deaminase-2-deficiency
#17
Miriam Elbracht, Michael Mull, Norbert Wagner, Christiane Kuhl, Angela Abicht, Ingo Kurth, Klaus Tenbrock, Martin Häusler
Deficiency of adenosine deaminase 2 (ADA2) due to homozygous or compound heterozygous mutations in the cat eye syndrome chromosome region, candidate 1 (CECR1) gene causes an autoimmune phenotype with systemic vasculitis affecting the skin, inner organs, and the central nervous system. Typically, stroke has been reported to follow systemic inflammatory disease and predominantly affects posterior and central brain areas. Here, we describe one of the rare patients in whom acute mesencephalic stroke preceded systemic inflammation and presented as initial clinical symptom...
December 26, 2016: Neuropediatrics
https://www.readbyqxmd.com/read/28003870/new-perspective-on-maintenance-therapies-for-platinum-sensitive-recurrent-ovarian-cancer-in-women-with-germline-and-somatic-mutations-in-brca1-and-brca2-genes
#18
I Vergote, V Bours, B Blaumeiser, J-F Baurain
Ovarian cancer (OC) is the seventh most common cancer in women. Although women diagnosed with OC are usually treated frontline with platinum-based chemotherapy, most of them relapse once treatment is halted. Therefore, maintenance therapies have been developed to secure the response and delay further chemotherapy. There are two established maintenance therapies for women affected by platinum-sensitive recurrent OC: bevacizumab, a humanized monoclonal antibody targeting vascular endothelial growth factor, and olaparib, an inhibitor of poly (adenosine diphosphate [ADP]-ribose) polymerase (PARPi)...
September 2016: Facts, Views & Vision in ObGyn
https://www.readbyqxmd.com/read/27997923/the-role-of-hmgb1-in-pial-arteriole-dilating-reactivity-following-subarachnoid-hemorrhage-in-rats
#19
Haoliang Xu, Benjarat Changyaleket, Tibor Valyi-Nagy, Randal O Dull, Dale A Pelligrino, David E Schwartz, Zhao Zhong Chong
High-mobility group box 1 protein (HMGB1) has been implicated in inflammatory responses, and is also associated with cerebral vasospasm after subarachnoid hemorrhage (SAH). However, there are no direct evident links between HMGB1 and cerebral vasospasm. We therefore investigated the effects of HMGB1 on pial arteriole reactivity following SAH in rats. We initially found that SAH induced a significant decrease in pial arteriole dilating responses to sciatic nerve stimulation (SNS), hypercapnia (CO2), and the topical suffusion of acetylcholine (ACh), adenosine (ADO), and s-nitroso-N-acetylpenicillamine (SNAP) over a 7-day period after SAH...
2016: Journal of Vascular Research
https://www.readbyqxmd.com/read/27997894/zedoarondiol-inhibits-platelet-derived-growth-factor-induced-vascular-smooth-muscle-cells-proliferation-via-regulating-amp-activated-protein-kinase-signaling-pathway
#20
Huimin Mao, Tianqi Tao, Dandan Song, Mi Liu, Xiaoren Wang, Xiuhua Liu, Dazhuo Shi
BACKGROUND/AIMS: Vascular smooth muscle cells (VSMCs) proliferation contributes significantly to atherosclerosis and in-stent restenosis. Platelet-derived growth factor-BB (PDGF-BB) plays a vital role in VSMCs proliferation. Zedoarondiol, a sesquiterpene lactone compound, has an anti-inflammatory activity. However, the role of zedoarondiol in PDGF-BB-mediated VSMCs proliferation remains unclear. In this study, we investigated the effects of zedoarondiol on PDGF-BB-induced VSMCs proliferation and explored the possible mechanisms...
2016: Cellular Physiology and Biochemistry
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