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https://www.readbyqxmd.com/read/28343356/development-of-a-novel-strategy-to-target-cd39-antithrombotic-activity-to-the-endothelial-platelet-microenvironment-in-kidney-ischemia-reperfusion-injury
#1
Maithili Sashindranath, Karen M Dwyer, Shala Dezfouli, Carly Selan, Sandra Crikis, Bo Lu, Yuping Yuan, Michael J Hickey, Karlheinz Peter, Simon C Robson, Peter J Cowan, Harshal H Nandurkar
Kidney ischemia-reperfusion injury (IRI) is common during transplantation. IRI is characterised by inflammation and thrombosis and associated with acute and chronic graft dysfunction. P-selectin and its ligand PSGL-1 are cell adhesion molecules that control leukocyte-endothelial and leukocyte-platelet interactions under inflammatory conditions. CD39 is the dominant vascular nucleotidase that facilitates adenosine generation via extracellular ATP/ADP-phosphohydrolysis. Adenosine signalling is protective in renal IRI, but CD39 catalytic activity is lost with exposure to oxidant stress...
March 25, 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/28319748/modulation-of-vascular-function-and-anti-aggregation-effect-induced-by-1%C3%A2-3-1%C3%A2-6-%C3%AE-d-glucan-of-saccharomyces-cerevisiae-and-its-carboxymethylated-derivative-in-rats
#2
Lorena Soares Bezerra, Marciane Magnani, Raul Jorge Hernan Castro-Gomez, Hassler Clementino Cavalcante, Tays Amanda Felisberto da Silva, Renata Layne Paixão Vieira, Isac Almeida de Medeiros, Robson Cavalcante Veras
BACKGROUND: β-d-Glucans are polysaccharides found in the cell walls of yeasts, such as Saccharomyces cerevisiae, and they have been studied because of their beneficial effects on health, mainly in terms of immunomodulation. However, information on the action of these polymers on vascular and platelet function is still scarce. This study evaluate the effect of (1→3) (1→6) β-d-glucan (βG-Sc) and its carboxymethylated derivative (CM-G) on vascular and platelet function in rats. METHODS: The animals received daily oral treatments with βG-Sc (20mg/kg) and CM-G (20mg/kg) for eight days...
January 12, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/28306357/asthma-causes-inflammation-of-human-pulmonary-arteries-and-decreases-vasodilatation-induced-by-prostaglandin-i2-analogs
#3
Nabil Foudi, Aouatef Badi, Mounira Amrane, Wassim Hodroj
OBJECTIVE: Asthma is a chronic inflammatory disease associated with increased cardiovascular events. This study assesses the presence of inflammation and the vascular reactivity of pulmonary arteries in patients with acute asthma. METHODS: Rings of human pulmonary arteries obtained from non-asthmatic and asthmatic patients were set up in organ bath for vascular tone monitoring. Reactivity was induced by vasoconstrictor and vasodilator agents. Protein expression of inflammatory markers was detected by western blot...
February 21, 2017: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/28292763/oxygen-delivery-and-the-restoration-of-the-muscle-energetic-balance-following-exercise-implications-for-delayed-muscle-recovery-in-patients-with-copd
#4
Gwenael Layec, Corey R Hart, Joel D Trinity, Oh-Sung Kwon, Matthew J Rossman, Ryan M Broxterman, Yann Le Fur, Eun-Kee Jeong, Russell S Richardson
Patients with chronic obstructive pulmonary disease (COPD) experience a delayed recovery from skeletal muscle fatigue following exhaustive exercise that likely contributes to their progressive loss of mobility. As this phenomenon is not well understood, this study sought to examine post-exercise peripheral oxygen (O2) transport and muscle metabolism dynamics in patients with COPD, two important determinants of muscle recovery. Twenty four subjects, 12 non-hypoxemic patients with COPD and 12 healthy subjects with a sedentary lifestyle, performed dynamic plantar flexion exercise at 40% of maximal work rate (WRmax) with phosphorus magnetic resonance spectroscopy ((31)P-MRS), near-infrared spectroscopy (NIRS), and vascular Doppler ultrasound assessments...
March 14, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28290914/-nonplatelet-effects-of-ticagrelor
#5
V V Boiko, G N Soboleva
This review summarizes current knowledge concerning "nonplatelet effects of P2Y12 receptor antagonist ticagrelor. We show the experimental and clinical evidence that ticagrelor increases plasma concentration of adenosine as a potential mechanism of additive effects of ticagrelor. In addition, we sought to compare the clinical profile of ticagrelor with pharmacological effects of adenosine and discuss from this point of view the effects of ticagrelor on vascular tone, cardiac electrophysiology, ischemia/reperfusion injury, immunity and inflammatory reactions, peripheral nerves...
July 2016: Kardiologiia
https://www.readbyqxmd.com/read/28288160/efficient-and-robust-differentiation-of-endothelial-cells-from-human-induced-pluripotent-stem-cells-via-lineage-control-with-vegf-and-cyclic-amp
#6
Takeshi Ikuno, Hidetoshi Masumoto, Kohei Yamamizu, Miki Yoshioka, Kenji Minakata, Tadashi Ikeda, Ryuzo Sakata, Jun K Yamashita
Blood vessels are essential components for many tissues and organs. Thus, efficient induction of endothelial cells (ECs) from human pluripotent stem cells is a key method for generating higher tissue structures entirely from stem cells. We previously established an EC differentiation system with mouse pluripotent stem cells to show that vascular endothelial growth factor (VEGF) is essential to induce ECs and that cyclic adenosine monophosphate (cAMP) synergistically enhances VEGF effects. Here we report an efficient and robust EC differentiation method from human pluripotent stem cell lines based on a 2D monolayer, serum-free culture...
2017: PloS One
https://www.readbyqxmd.com/read/28278315/biochemical-effects-of-exercise-on-a-fasciocutaneous-flap-in-a-rat-model
#7
Edita Aksamitiene, Adam L Baker, Sudeep Roy, Salini Hota, Li-Hui Zhang, Julianna Rodin, Kealan Hobelmann, Jan B Hoek, Edmund A Pribitkin
Importance: An overwhelming amount of data suggest that cardiovascular exercise has a positive effect on the mind and body, although the precise mechanism is not always clear. Objective: To assess the clinical and biochemical effects of voluntary cardiovascular exercise on pedicled flaps in a rodent model. Design, Setting, and Participants: Eighteen adult Sprague-Dawley male rats were randomized into a resting animal group (RAG) (n=9) and an exercise animal group (EAG) (n=9) for 14 days (July 23, 2013, through July 30, 2013)...
March 9, 2017: JAMA Facial Plastic Surgery
https://www.readbyqxmd.com/read/28277329/sevoflurane-compared-with-isoflurane-minimizes-lung-damage-in-pulmonary-but-not-in-extrapulmonary-acute-respiratory-distress-syndrome-in-rats
#8
Mariana N Araújo, Cíntia L Santos, Cynthia S Samary, Luciana B B Heil, Vinicius C M Cavalcanti, Fernanda F Cruz, Nathane S Felix, Johnatas D Silva, Marcelo M Morales, Paolo Pelosi, Fatima C Fernandes, Nivaldo R Villela, Pedro L Silva, Patricia R M Rocco
BACKGROUND: Volatile anesthetics modulate inflammation in acute respiratory distress syndrome (ARDS). However, it is unclear whether they act differently depending on ARDS etiology. We hypothesized that the in vivo and in vitro effects of sevoflurane and isoflurane on lung damage would not differ in pulmonary (p) and extrapulmonary (exp) ARDS. METHODS: Twenty-four Wistar rats were randomized to undergo general anesthesia (1-2 minutes) with sevoflurane and isoflurane...
March 8, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28250241/stimulation-of-ovarian-follicle-growth-following-ampk-inhibition
#9
Xiaowei Lu, Song Guo, Yuan Cheng, Jae-Hong Kim, Yi Feng, Yun Feng
Previous studies showed that the protein kinase B (Akt)-mammalian target of rapamycin (mTOR) and Hippo signaling-Yes associated protein (YAP) pathways play important roles in promoting follicle growth. Additionally, other studies demonstrated that 5' adenosine monophosphate-activated protein kinase (AMPK) is an upstream regulatory element of mTOR and YAP. Here, we used AMPK inhibitor (Compound C) to in vitro culture ovaries from 10-day-old mice followed by in vivo grafting into adult hosts, or to in situ treat ovaries of 3-week-old mice by intrabursal injection followed by gonadotropin stimulation...
March 1, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
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
#10
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
#11
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
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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