Contracture and the calcium paradox in the rat heart.

abstract：:The influence of inhibition of the Na+ pump, with secondary stimulation of Na+-Ca++ exchange, on cellular Ca++ distribution is examined using the on-line scintillation disk technique and cultured neonatal rat myocardial cells. Under control conditions, La+++ displaced 78.1 +/- 1.13% (SEM) of the total cell associated ...

journal_title：Circulation research

authors： Burt JM,Langer GA

更新日期：1982-11-01 00:00:00

abstract：:An animal model was used to test the hypothesis that in heart failure the decrease in the ability to resynthesize ATP through the creatine kinase (CK) reaction (which we call energy reserve) contributes to the inability of the heart to maintain its normal function and contractile reserve. One-week-old turkey poults we...

journal_title：Circulation research

authors： Liao R,Nascimben L,Friedrich J,Gwathmey JK,Ingwall JS

更新日期：1996-05-01 00:00:00

abstract：:The sinoatrial node, which resides at the junction of the right atrium and the superior caval vein, contains specialized myocardial cells that initiate the heart beat. Despite this fundamental role in heart function, the embryonic origin and mechanisms of localized formation of the sinoatrial node have not been define...

journal_title：Circulation research

authors： Mommersteeg MT,Hoogaars WM,Prall OW,de Gier-de Vries C,Wiese C,Clout DE,Papaioannou VE,Brown NA,Harvey RP,Moorman AF,Christoffels VM

更新日期：2007-02-16 00:00:00

abstract：:The effects of acute hypoxemia and hypercapnic acidosis were examined in five unanesthetized dogs in which sodium intake was controlled at 80 mEq/24 hours for 4 days prior to study. Each animal was studied during combined acute hypoxemia and hypercapnic acidosis (Pao2 = 36 +/- 1 mm Hg, Paco2 = 52 +/- 1 mm Hg, pH = 7.1...

journal_title：Circulation research

authors： Rose CE Jr,Kimmel DP,Godine RL Jr,Kaiser DL,Carey RM

更新日期：1983-08-01 00:00:00

abstract：:A period of prolonged vasodilation follows flow-restricted exercise of skeletal muscle. We tested the hypothesis that adenosine participates in mediating this vascular response. Vascularly isolated, anterior calf muscles of anesthetized dogs were stimulated to contract at a rate of 4 twitches/sec. Blood flow was held ...

journal_title：Circulation research

authors： Belloni FL,Phair RD,Sparks HV

更新日期：1979-06-01 00:00:00

abstract：:Vascular restenosis involves contraction, proliferation, and remodeling of the arterial wall in response to overstretch injury. Mitogen-activated protein kinases (MAPKs) are implicated in both contraction and proliferation of vascular smooth muscle (VSM), and studies of porcine carotid arterial muscle strips have show...

journal_title：Circulation research

authors： Pyles JM,March KL,Franklin M,Mehdi K,Wilensky RL,Adam LP

更新日期：1997-12-01 00:00:00

abstract：:Diabetes mellitus has profound adverse effects on vascular and, in particular, endothelial function. Although pressure-induced constriction ("myogenic tone") is a major contributor to the regulation of blood flow, little is known about the effects of diabetes on this response. Diabetes has been shown to diminish the d...

journal_title：Circulation research

authors： Zimmermann PA,Knot HJ,Stevenson AS,Nelson MT

更新日期：1997-12-01 00:00:00

abstract：:A number of scavengers of reactive oxygen metabolites reduce myocardial injury when given before ischemia and reperfusion, but few, if any, have proven to be effective when given near the onset of reperfusion. This is particularly true when infarct size is measured after at least 48 hours of reperfusion, when the full...

journal_title：Circulation research

authors： Carrea FP,Lesnefsky EJ,Repine JE,Shikes RH,Horwitz LD

更新日期：1991-06-01 00:00:00

abstract：:Aldose reductase (AR), a member of the aldo-keto reductase superfamily, has been shown to metabolize toxic aldehydes generated by lipid peroxidation, suggesting that it may serve as an antioxidant defense. To investigate its role in the late phase of ischemic preconditioning (PC), conscious rabbits underwent 6 cycles ...

journal_title：Circulation research

authors： Shinmura K,Bolli R,Liu SQ,Tang XL,Kodani E,Xuan YT,Srivastava S,Bhatnagar A

更新日期：2002-08-09 00:00:00

abstract：:This study was performed to examine, first, the protective effects and responses of collateral vessels of the hind limb in normal and atherosclerotic monkeys and, second, the effects of chronic arterial occlusion on the development of atherosclerosis. The iliac artery was ligated on one side in cynomolgus monkeys. Six...

journal_title：Circulation research

authors： Lopez JA,Armstrong ML,Harrison DG,Piegors DJ,Heistad DD

更新日期：1988-12-01 00:00:00

abstract：:In intact porcine aorta, endothelium-derived nitric oxide released on thrombin stimulation inhibits the concomitant production of endothelin. Experiments were designed to examine the effect of hirudin (which inactivates thrombin) and the nitrovasodilators nitroglycerin and 3-morpholinosydnonimine on the spontaneous an...

journal_title：Circulation research

authors： Boulanger CM,Lüscher TF

更新日期：1991-06-01 00:00:00

abstract：:We have previously shown that VEGF165 gene delivery into ischemic skeletal muscle exerts not only proangiogenic, but also remarkable antiapoptotic and proregenerative activity. The aim of this study was to determine whether recombinant adeno-associated virus (rAAV)-mediated gene delivery of VEGF165 into cardiac muscle...

journal_title：Circulation research

authors： Ferrarini M,Arsic N,Recchia FA,Zentilin L,Zacchigna S,Xu X,Linke A,Giacca M,Hintze TH

更新日期：2006-04-14 00:00:00

abstract：:Peroxisome proliferator-activated receptor (PPAR) gamma is activated by thiazolidinediones (TZDs), widely used as insulin-sensitizing agents for the treatment of type 2 diabetes. TZDs have been shown to induce apoptosis in a variety of mammalian cells. In vascular smooth muscle cells (VSMCs), proliferation and apoptos...

journal_title：Circulation research

authors： Bruemmer D,Yin F,Liu J,Berger JP,Sakai T,Blaschke F,Fleck E,Van Herle AJ,Forman BM,Law RE

更新日期：2003-08-22 00:00:00

abstract：:Early afterdepolarizations (EADs) are a type of triggered activity found in heart muscle. We used voltage-clamped sheep cardiac Purkinje fibers to examine the mechanism underlying EADs induced near action potential plateau voltages with the Ca2+ current agonist Bay K 8644 and the effect of several interventions known ...

journal_title：Circulation research

authors： January CT,Riddle JM

更新日期：1989-05-01 00:00:00

abstract：RATIONALE:The ventricular conduction system controls the propagation of electric activity through the heart to coordinate cardiac contraction. This system is composed of specialized cardiomyocytes organized in defined structures including central components and a peripheral Purkinje fiber network. How the mammalian ven...

journal_title：Circulation research

authors： Miquerol L,Moreno-Rascon N,Beyer S,Dupays L,Meilhac SM,Buckingham ME,Franco D,Kelly RG

更新日期：2010-07-09 00:00:00

abstract：RATIONALE:In ventricular myocytes of large mammals with low T-tubule density, a significant number of ryanodine receptors (RyRs) are not coupled to the sarcolemma; cardiac remodeling increases noncoupled RyRs. OBJECTIVE:Our aim was to test the hypothesis that coupled and noncoupled RyRs have distinct microdomain-depen...

journal_title：Circulation research

authors： Dries E,Bito V,Lenaerts I,Antoons G,Sipido KR,Macquaide N

更新日期：2013-11-08 00:00:00

abstract：:Mitochondria play a key role in determining cell fate during exposure to stress. Their role during ischemia/reperfusion is particularly critical because of the conditions that promote both apoptosis by the mitochondrial pathway and necrosis by irreversible damage to mitochondria in association with mitochondrial perme...

journal_title：Circulation research

authors： Weiss JN,Korge P,Honda HM,Ping P

更新日期：2003-08-22 00:00:00

abstract：:Compelling evidence continues to emerge suggesting that the glycocalyx surface layer on vascular endothelial cells plays a determining role in numerous physiological processes including inflammation, microvascular permeability, and endothelial mechanotransduction. Previous research has shown that enzymes degrade the g...

journal_title：Circulation research

authors： Potter DR,Jiang J,Damiano ER

更新日期：2009-06-05 00:00:00

abstract：:Urea transporters have been cloned from kidney medulla (UT-A) and erythrocytes (UT-B). We determined whether UT-A proteins could be detected in heart and whether their abundance was altered by uremia or hypertension or in human heart failure. In normal rat heart, bands were detected at 56, 51, and 39 kDa. In uremic ra...

journal_title：Circulation research

authors： Duchesne R,Klein JD,Velotta JB,Doran JJ,Rouillard P,Roberts BR,McDonough AA,Sands JM

更新日期：2001-07-20 00:00:00

abstract：:This study investigations the phenomenon of sustained mechanical alternans (SMA) through the use of quantitative criteria. Discrete analysis is used to demonstrate that the hemodynamic variables during SMA are governed by a simple mathematical relation. The analysis shows that the value of the slope created by the two...

journal_title：Circulation research

authors： Adler D,Nikolic S,Sonnenblick EH,Yellin EL

更新日期：1991-07-01 00:00:00

abstract：:We performed experiments to determine whether or not acetylcholine exerts a prejunctional inhibitory effect on adrenergic neurotransmission in the human blood vessel wall. Rings of human greater saphenous veins were prepared 2 to 15 hours after death and mounted for isometric tension recording in organ chambers filled...

journal_title：Circulation research

authors： Rorie DK,Rusch NJ,Shepherd JT,Vanhoutte PM,Tyce GM

更新日期：1981-08-01 00:00:00

abstract：RATIONALE:Proteasomal degradation is altered in many disease phenotypes including cardiac hypertrophy, a prevalent condition leading to heart failure. Our recent investigations identified heterogeneous subpopulations of proteasome complexes in the heart and implicated multiple mechanisms for their regulation. OBJECTIV...

journal_title：Circulation research

authors： Drews O,Tsukamoto O,Liem D,Streicher J,Wang Y,Ping P

更新日期：2010-10-29 00:00:00

abstract：:Pinacidil belongs to a novel group of compounds that enhance the potassium permeability of vascular smooth muscle. Evidence also exists that this drug enhances the potassium permeability of cardiac tissue. The purpose of the present investigation was to determine if pinacidil alters potassium-channel activity in heart...

journal_title：Circulation research

authors： Arena JP,Kass RS

更新日期：1989-08-01 00:00:00

abstract：:Aging of the vasculature plays a central role in morbidity and mortality of older people. To develop novel treatments for amelioration of unsuccessful vascular aging and prevention of age-related vascular pathologies, it is essential to understand the cellular and functional changes that occur in the vasculature durin...

journal_title：Circulation research

authors： Ungvari Z,Tarantini S,Donato AJ,Galvan V,Csiszar A

更新日期：2018-09-14 00:00:00

abstract：:Focal ectopic activity in cardiac tissue is a key factor in the initiation and perpetuation of tachyarrhythmias. Because myofibroblasts as present in fibrotic remodeled myocardia and infarct scars depolarize cardiomyocytes by heterocellular electrotonic interactions via gap junctions in vitro, we investigated using st...

journal_title：Circulation research

authors： Miragoli M,Salvarani N,Rohr S

更新日期：2007-10-12 00:00:00

abstract：:Cellular Ca2+ regulation is abnormal in diseased hearts. We designed this study to assess the role of the Na(+)-Ca2+ exchanger in excitation-contraction coupling in surviving myocardium of the infarcted heart. We measured cellular contractions and whole-cell currents in single left ventricular myocytes isolated from t...

journal_title：Circulation research

authors： Litwin SE,Bridge JH

更新日期：1997-12-01 00:00:00

abstract：:The aim of this study was to examine the effect of exercise training on reflex control of vascular resistance in human males. Forearm vascular responses to lower body negative pressure (LBNP) at -10 and -40 mm Hg were compared between highly trained young athletes (21.5 +/- 0.5 years old, n = 14) and age-matched nonat...

journal_title：Circulation research

authors： Takeshita A,Jingu S,Imaizumi T,Kunihiko Y,Koyanagi S,Nakamura M

更新日期：1986-07-01 00:00:00

abstract：RATIONALE:POSTN (Periostin) is an ECM (extracellular matrix) protein involved in tissue remodeling in response to injury and a contributing factor in tumorigenesis, suggesting that POSTN plays a role in the pathogenesis of pulmonary hypertension (PH). OBJECTIVE:We aimed to gain insight into the mechanistic contributio...

journal_title：Circulation research

authors： Nie X,Shen C,Tan J,Wu Z,Wang W,Chen Y,Dai Y,Yang X,Ye S,Chen J,Bian JS

更新日期：2020-10-09 00:00:00

abstract：:Despite improvements in the therapy of underlying heart disease, sudden cardiac death is a major cause of death worldwide. Disturbed Na and Ca handling is known to be a major predisposing factor for life-threatening tachyarrhythmias. In cardiomyocytes, many ion channels and transporters, including voltage-gated Na and...

journal_title：Circulation research

authors： Wagner S,Maier LS,Bers DM

更新日期：2015-06-05 00:00:00

abstract：:The direct-current magnetocardiogram, which shows the T-Q (baseline) shift, is used to clarify the cause of S-T depression induced by stress testing in the human heart. Measurements are made of the amount of baseline shift associated with the S-T depression. Results are presented of a well-documented patient, with typ...

journal_title：Circulation research

authors： Cohen D,Savard P,Rifkin RD,Lepeschkin E,Strauss WE

更新日期：1983-08-01 00:00:00