Search Results
Results 101 - 150 of 1576
1 2 3 4 5 6 7 8 9 10 >
Erling Nilon N Junior Vascular Surgery, Department of Surgery, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto AlegreRS, - - 2013
This study tests the hypothesis that local or remote ischemic preconditioning may protect the intestinal mucosa against ischemia and reperfusion injuries resulting from temporary supraceliac aortic clamping. Twenty-eight Wistar rats were divided into four groups: the sham surgery group, the supraceliac aortic occlusion group, the local ischemic preconditioning prior to ...
Grant Jennifer S JS Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, United - - 2013
MicroRNAs are small noncoding RNAs involved in the regulation of gene expression and have recently been implicated in the development of pulmonary arterial hypertension (PAH). Previous work has established that miR-451 is upregulated in rodent models of PAH. The role of miR-451 in the pulmonary circulation is unknown. We therefore ...
Kim In-Gyu IG Department of Surgery, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, - - 2013
Studies of liver anatomy have developed alongside clinical achievements, as these types of research complement each other. The aim of this study is to determine whether or not the portal vein branches (P4d) in 'Nagino's trisectionectomy' exist, and to examine their characteristics using cadaver dissection. From April 2012 to July ...
Enomoto Masahiro - - 2013
Background:Vasopressin is a systemic vasoconstrictor. Its pulmonary vasodilatory effect is controversial and limited data are available on its use in neonates with pulmonary hypertension. Hypothesizing that the vasopressin-induced pulmonary vasodilation is developmentally regulated, we evaluated its pulmonary and systemic arterial response in newborn and adult rats.Methods:Vessels were mounted on a ...
Toba Michie - - 2013
We have investigated the temporal relationship between the hemodynamic and histological/morphological progression in a rat model of pulmonary arterial hypertension that develops pulmonary arterial lesions indistinguishable from those in human pulmonary arterial hypertension. Adult male rats were injected with Sugen5416 and exposed to hypoxia for 3 weeks followed by a ...
Enomoto Masahiro - - 2013
Inhaled nitric oxide (NO) and other cyclic guanosine (cGMP) or adenosine (cAMP) monophosphate-dependent pulmonary vasodilators are often utilized in combination for the treatment of the persistent pulmonary hypertension of the newborn syndrome (PPHN). There is in vitro evidence to indicate that NO downregulate the pulmonary vascular response to cGMP-dependent agonists ...
Marbacher Serge - - 2013
The biological mechanisms predisposing intracranial saccular aneurysms to growth and rupture are not yet fully understood. Mural cell loss is a histological hallmark of ruptured cerebral aneurysms. It remains unclear whether mural cell loss predisposes to aneurysm growth and eventual rupture. Sodium dodecyl sulfate decellularized and nondecellularized saccular aneurysm from ...
Wang Jianzhen - - 2013
Abstract Superior sagittal sinus thrombosis (SSST) is a form of cerebral venous sinus thrombosis (CVST) routinely treated with anticoagulation therapy. Anticoagulation and thrombolysis treatment effects on neurological function, venous recanalization, and brain edema were compared after SSST in rats. Male Sprague-Dawley rats underwent non-fatal SSST induction and were divided into ...
Mendizábal Yolanda Y Area of Physiology, Department of Medical Sciences, University of Castilla-La Mancha, School of Medicine and Regional Centre for Biomedical Research (CRIB), Albacete, - - 2013
We have studied the vasoactive role of prostaglandins derived from perivascular adipose tissue (PVAT) and their effects on endothelial function in healthy rats and rats with metabolic syndrome (SHROB). Mesenteric resistance arteries (MRA) from SHROB and control rats (WKY) were mounted on wire myographs: a) together with a sphere of ...
Pankey Edward A - - 2013
The transient receptor potential (TRPV4) is a nonselective cation channel expressed on many cell types including the vascular endothelium and smooth muscle cells. TRPV4 channels play a role in regulating vasomotor tone and capillary permeability. The present study was undertaken to investigate responses to the TRPV4 agonist GSK101790A on the ...
Spradley Frank T FT Section of Experimental Medicine, Georgia Regents University Augusta, Georgia ; Department of Medicine, Georgia Regents University Augusta, - - 2013
Chronic renal failure (CRF) is associated with hypertension and concomitant endothelial dysfunction, enhanced vasoconstriction, and nitric oxide synthase (NOS) dysfunction. Vascular function in patients is assessed in peripheral extremity arteries like the finger arteries, whereas animal studies often use the centrally located aorta. Therefore, we examined whether peripheral tail artery ...
Porras-González Cristina - - 2013
The effects of human urotensin II (hUII) on the vascular tone of different animal species has been studied extensively. However, little has been reported on the vasoactive effects of rat urotensin (rUII) in murine models. The aim of the present study was to investigate the effects of rUII on vasoreactivity ...
Labruijere Sieneke - - 2013
Endothelin-1 causes long-lasting contraction via endothelin type A receptor (ETAR) in isolated rat mesenteric arteries (RMA) that cannot be readily terminated by removing the agonist, or by adding the ETAR antagonist BQ123 or the NO donor sodium nitroprusside. It could be terminated by adding calcitonin-gene related peptide (CGRP), most likely ...
Senadheera Sevvandi - - 2013
In pregnancy, the vasculature of the uterus undergoes rapid remodelling to increase blood flow and maintain perfusion to the fetus. The present study determines the distribution and density of caveolae, transient receptor potential vanilloid type 4 channels (TRPV4) and myoendothelial gap junctions, and the relative contribution of related endothelium-dependent vasodilator ...
Allen Robert A - - 2013
The objective of this study was to evaluate the long-term performance of cell-free vascular grafts made from a fast-degrading elastic polymer. We fabricated small arterial grafts from microporous tubes of poly(glycerol sebacate) (PGS) reinforced with polycaprolactone (PCL) nanofibers on the outer surface. Grafts were interpositioned in rat abdominal aortas and ...
Alzoubi Abdallah - - 2013
Pulmonary arterial hypertension (PAH) is characterized by elevated pulmonary arterial pressure with lumen-occluding neointimal and plexiform lesions. Activation of store-operated calcium entry channels promotes contraction and proliferation of lung vascular cells. TRPC4 is a ubiquitously expressed store-operated calcium entry channel, but its role in PAH is unknown. We tested the ...
Colvin Kelley L - - 2013
Rationale Autoimmunity has long been associated with pulmonary hypertension. Bronchus associated lymphoid tissue plays important roles in antigen sampling and self-tolerance during infection and inflammation. Objectives We reasoned that activated bronchus associated lymphoid tissue would be evident in rats with pulmonary hypertension, and that loss of self-tolerance would result in ...
Guo Qiang - - 2013
A recent study from our group demonstrated that the Ca(2+)-sensing receptor (CaSR) was upregulated, and the extracellular Ca(2+)-induced increase in cytosolic Ca(2+) concentration ([Ca(2+)]cyt) was enhanced in pulmonary arterial smooth muscle cells from patients with idiopathic pulmonary arterial hypertension and animals with experimental pulmonary hypertension (PH). However, it is unclear ...
Khanamiri Saereh S Department of Biomedical Sciences, Faculty of Health and Medical Sciences, Danish National Research Foundation Centre for Cardiac Arrhythmia, The Panum Institute, University of Copenhagen, 12.5.14, Blegdamsvej 3, 2200 Copenhagen N, Denmark. - - 2013
The goal of the present study was to determine the role of KCNQ-encoded Kv channels (Kv7 channels) in the passive and active regulation of coronary flow in normotensive and hypertensive rats. In left anterior descending coronary arteries from normotensive rats, structurally different Kv7.2 to 7.5 activators produced relaxations, which were ...
Zhang Chao - - 2013
The HydroCoil Endovascular Aneurysm Occlusion and Packing Study clinical trial, comparing HydroCoil with platinum coils, reported an 8.6% reduction in significant recurrence following cerebral aneurysm coil embolization. We sought to better understand the mechanism of aneurysmal healing following HydroCoil implantation using the rat external carotid artery (ECA) sidewall aneurysm model. ...
Monteiro Carvalho Mori da Cunha Marina Gabriela - - 2013
Intra-arterial injection of mesenchymal stem cells has been proven to result in a superior nephroprotection compared to intravenous injection. This avoids initial passage through filter organs such as the lung, liver and spleen. The aim of the present study was to investigate whether suprarenal aortic delivery results in a homogenous ...
Losurdo Pasquale - - 2013
Menopause is associated with increased arterial stiffness, an independent marker of cardiovascular risk. Omega-3 polyunsaturated fatty acids (N3-PUFAs) are thought to have multiple cardiovascular benefits, including prevention of arterial stiffness. We investigated whether treatment with N3-PUFA prevents increase in arterial stiffness in ovariectomized rats, an animal model of experimental menopause. ...
Kim Ki-Seok - - 2013
The ubiquitin-proteasome system is the major intracellular protein degradation pathway in the eukaryotic cells. Bortezomib inhibits 26S proteasome-induced I-κBα degradation and suppresses nuclear factor-kappa B (NF-κB) activation. We examined the effect of bortezomib on neointima formation after of a rat carotid artery balloon injury. After carotid artery balloon denudation, bortezomib ...
Pankey Edward A - - 2013
Cardiovascular responses to the tyrosine kinase inhibitor imatinib were investigated in the rat. The iv injections of imatinib 0.3 - 30 mg/kg produced small decreases in pulmonary arterial pressure, larger dose dependent decreases in systemic arterial pressure and no change or small increases in cardiac output suggesting that the systemic ...
Zhang Li - - 2013
15-lipoxygenase/15-hydroxyeicosatetraenoic acid (15-LO/15-HETE) is known to modulate pulmonary vascular medial hypertrophy and intimal endothelial cells migration and angiogenesis after hypoxia. However, it is unclear whether 15-HETE affects the adventitia of the pulmonary arterial wall. We performed immunohistochemistry, adventitia fibrosis, pulmonary artery fibroblasts phenotype and extracellular matrix (ECM) deposition to determine ...
Janairo Randall R R - - 2013
Due to high incidence of vascular bypass procedures, an unmet need for suitable vessel replacements exists, especially for small-diameter (< 6 mm) vascular grafts. Here, we developed a novel, bilayered, synthetic vascular graft of 1-mm diameter that consisted of a microfibrous luminal layer and a nanofibrous outer layer, which was ...
Compeer M G - - 2013
Endothelin-1 (ET-1) and endothelin-2 (ET-2) cause potent long-lasting vasoconstrictions by tight binding to smooth muscle ETA receptors. We tested the hypotheses that different mechanisms mediate initiation and maintenance of arterial contractile responses to ET-1 and ET-2 and that this differs between vascular beds. Segments of rat mesenteric resistance artery (MRA) ...
Xu Changwu - - 2013
Proliferation and migration of vascular smooth muscle cells (VSMCs) play pivotal roles in the development of restenosis after angioplasty and oxidative stress involves both processes. Naringenin, a flavanone compound found in citrus fruits, has been widely evaluated for antioxidant activity. This study was designed to explore whether naringenin could inhibit ...
Sylvester Andrew - - 2013
Abdominal aortic aneurysms (AAAs) are rupture-prone progressive dilations of the infrarenal aorta due to a loss of elastic matrix that lead to weakening of the aortic wall. Therapies to coax biomimetic regenerative repair of the elastic matrix by resident, diseased vascular cells may thus be useful to slow, arrest, or ...
Rits Yevgeniy - - 2013
Clinical studies have suggested a benefit for hyperbaric oxygen (HBO) treatment in decreasing symptomatic restenosis after coronary angioplasty. We hypothesize that HBO treatment will decrease hyperplastic intimal area after arterial balloon injury in a rat. Fifty-four male Sprague-Dawley rats (Charles River Laboratories, Wilmington, MA) were randomly assigned either to room ...
Jaldin Rodrigo Gibin - - 2013
Smoking is the most relevant environmental factor that affects the development of aortic aneurysm. Smokers have elevated levels of elastase activity in the arterial wall, which leads to weakening of the aorta. The aim of this study was to verify whether cigarette smoke exposure itself is capable of altering the ...
Gorshkova O P - - 2013
The responses of rat pial vessels to red laser irradiation can be mediated by NO. NO mainly affects major arteries and did not contribute to reactivity of small pial arteries and precortical arterioles.
Simsek Tekin - - 2013
Vessel grafting is commonly used for revascularization or pedicle lengthening. Although veins are more commonly used, they can form aneurysms when bridging an arterial gap. This can lead to thrombosis, and the risk is increased when there is a size discrepancy. This study reports the long-term results of arterial lengthening ...
Mendoza James - - 2013
This study determined whether the membrane-permeable ventilatory stimulant, L-cysteine ethylester (L-CYSee), reversed the deleterious actions of morphine on arterial blood-gas chemistry in isoflurane-anesthetized rats. Morphine (2mg/kg, i.v.) elicited sustained decreases in arterial blood pH, pO2 and sO2, and increases in pCO2 (all responses indicative of hypoventilation) and Alveolar-arterial gradient (indicative ...
Zhao Li-Mei - - 2013
The present study was designed to investigate the role of advanced glycation end products (AGEs) in intermediate-conductance and small-conductance Ca(2+)-activated potassium channels (KCa3.1 and KCa2.3)-mediated relaxation in rat resistance arteries and the underlying mechanism. The endothelial function of mesenteric arteries was assessed with the use of wire myography. Expression levels ...
Zhang Lijun - - 2013
The objective of this study were to determine the mechanism of action and role of the κ-opioid receptor (κ-OR) on hypoxic pulmonary artery hypertension (HPH) in the rat and its underlying mechanisms. The effect of U50,488H, a selective κ-OR agonist, on the proliferation of pulmonary arterial smooth muscle cells (PASMCs) ...
Berritto D - - 2013
To validate a rat model of acute arterial mesenteric ischemia correlating MRI patterns with macro and microscopic changes in the small bowel. Thirty Sprague-Dawley rats were assigned to two experimental groups (Group I and Group II) of fifteen rats each. Group I underwent surgical procedure of superior mesenteric artery (SMA) ...
Ferrari Renata Salatti - - 2013
Context To evaluate lung and liver changes in two experimental models using intraperitoneal carbon tetrachloride (CCl4) and bile duct ligation (BDL). Methods Twenty-four male Wistar rats were divided into a control group (CO) and an experimental group (EX). We evaluated the liver transaminases (AST, ALT, AP), arterial blood gases (PaO2, ...
Hadri Lahouaria L Cardiovascular Research Center, Box 1030, Icahn School of Medicine at Mount Sinai, 1470 Madison Ave, New York, NY 10029, USA. - - 2013
Pulmonary arterial hypertension (PAH) is characterized by dysregulated proliferation of pulmonary artery smooth muscle cells leading to (mal)adaptive vascular remodeling. In the systemic circulation, vascular injury is associated with downregulation of sarcoplasmic reticulum Ca(2+)-ATPase 2a (SERCA2a) and alterations in Ca(2+) homeostasis in vascular smooth muscle cells that stimulate proliferation. We, ...
Tawa Masashi - - 2013
Individual vascular beds exhibit differences in vascular reactivity. The present study examined the influence of hypoxia on endothelium-dependent, especially nitric oxide (NO)-mediated, relaxation in the isolated rat common carotid, superior mesenteric and external iliac arteries. Hypoxia for 1 and 3 h had no effects on the relaxations caused by acetylcholine ...
Yu Mu-Qing - - 2013
This study investigated the potential role of ERK1/2-cyclinE1 signaling pathway in rat pulmonary artery smooth muscle cells (rPASMCs) proliferation and pulmonary vascular remodeling induced by cigarette smoke exposure. A total of 24 male Wistar rats were randomly divided into 4 groups: control group (C group), S-1M, S-3M and S-6M groups ...
Tang Qiqiang - - 2013
The aim of the present study was to explore the role of suture diameter and vessel insertion position in the preparation of the middle cerebral artery occlusion (MCAO) rat model. A total of 84 Sprague-Dawley rats (weighing 250-300 g) were randomly divided to three groups: group A (type 1.0, suture ...
Shimamura Norihito - - 2013
We developed a novel model of a rat embolic cerebral infarction with a quantifiable autologous arterial blood clot. The left femoral artery had 0.15 ml of blood withdrawn and mixed with 10 units of thrombin in 50 μl saline. After 30 min, the clot was suctioned into a 4-French polyvinyl chloride tube. A 24-gage ...
Ay Yasin - - 2013
We investigated both the effect of levosimendan and the role of oxidant/antioxidant status and trace element levels in the pulmonary artery of rats. Fourteen male Wistar albino rats were randomly divided into two groups of seven animals each. Group 1 was not exposed to levosimendan and served as a control. ...
Li Gang - - 2013
BACKGROUND: Angiotensin-converting enzyme 2 (ACE2), an ACE homolog, hydrolyzes angiotensin II and opposes its actions, and plays a protective role in the pathogenesis of pulmonary arterial hypertension (PAH). However, the underlying mechanisms involved in the effect of ACE2 on PAH are still uncertain. In this study, we observed the effects ...
Fan You-Fei - - 2013
AIMS: Oxidative stress is implicated in the pathology of pulmonary arterial hypertension. Previously, we demonstrated that vardenafil, a phosphodiesterase-5 inhibitor, has potential as therapy for pulmonary arterial hypertension, although the mechanism remained uncharacterized. Here, we aimed to determine baseline levels of oxidative stress in pulmonary arterial hypertension and investigate whether ...
Dumas de la Roque Eric - - 2013
Background:Pulmonary hypertension (PH) is a disease that affects the adult or infant population. Dehydroepiandrosterone (DHEA), a steroid hormone, has been previously shown to prevent and to reverse PH in an adult rat model. We thus investigated its effect in a rat-pup model of chronic hypoxic PH.Methods:Animals were maintained for 3 ...
Nam Kweon-Ho - - 2013
The geometry of carotid artery bifurcation is of high clinical interest because it determines the characteristics of blood flow that is closely related to the formation and development of atherosclerotic plaque. However, information on the dynamic changes in the vessel wall of carotid artery bifurcation during a pulsatile cycle is ...
Nemeth Norbert - - 2013
We aimed to investigate hemodynamic, microcirculatory and hemorheological consequence of infrarenal or suprarenal aortic cross-clamping (IRAXC, SRAXC) in the rat. We hypothesized that the magnitude of the changes are different. Twenty-one male rats were randomized into Control, IRAXC or SRAXC groups. Under anesthesia the right carotid artery was cannulated for ...
Momi Stefania - - 2013
Thrombolytic therapy is the cornerstone of treatment of acute atherothrombotic ischemic stroke but is associated with brain hemorrhage, while antiplatelet therapy has limited efficacy and is still associated with intracranial bleeding. Therefore, new antithrombotic approaches with a better efficacy/safety ratio are required. We have assessed the effect of ALX-0081, a ...
1 2 3 4 5 6 7 8 9 10 >