Oscillatory afterpotentials in dog ventricular muscle fibers.

abstract：:The mTOR (mechanistic target of rapamycin) is a master regulator of several crucial cellular processes, including protein synthesis, cellular growth, proliferation, autophagy, lysosomal function, and cell metabolism. mTOR interacts with specific adaptor proteins to form 2 multiprotein complexes, called mTORC1 (mTOR co...

journal_title：Circulation research

authors： Sciarretta S,Forte M,Frati G,Sadoshima J

更新日期：2018-02-02 00:00:00

abstract：:Excitation-contraction coupling in the cardiac myocyte is mediated by a number of highly integrated mechanisms of intracellular Ca²(+) transport. The complexity and integrative nature of heart cell electrophysiology and Ca²(+) cycling has led to an evolution of computational models that have played a crucial role in s...

journal_title：Circulation research

authors： Greenstein JL,Winslow RL

更新日期：2011-01-07 00:00:00

abstract：:We determined age-related differences in automaticity and responsiveness of cardiac Purkinje fibers from adult and neonatal dogs to graded concentrations of epinephrine, isoproterenol, and phenylephrine. Purkinje fibers were studied with standard microelectrode techniques during superfusion with Tyrode's solution at 3...

journal_title：Circulation research

authors： Rosen MR,Hordof AJ,Ilvento JP,Danilo P Jr

更新日期：1977-04-01 00:00:00

abstract：RATIONALE:One of the physiological mechanisms by which the heart adapts to a rise in blood pressure is by augmenting myocyte stretch-mediated intracellular calcium, with a subsequent increase in contractility. This slow force response was first described over a century ago and has long been considered compensatory, but...

journal_title：Circulation research

authors： Cingolani OH,Kirk JA,Seo K,Koitabashi N,Lee DI,Ramirez-Correa G,Bedja D,Barth AS,Moens AL,Kass DA

更新日期：2011-12-09 00:00:00

abstract：:We discuss the recent finding by Mizishima's group regarding the role of the autophagy-related conjugation system in mediating the closure of autophagosomes and its implication in the study of autophagy in mammalian cells. The study not only shows a novel function of the autophagy-related conjugation system but also i...

journal_title：Circulation research

authors： Saito T,Sadoshima J

更新日期：2017-02-17 00:00:00

abstract：:As described in earlier reviews in this series on the molecular basis of hypertrophic cardiomyopathy (HCM), HCM is one of the archetypal monogenic cardiovascular disorders to be understood at the molecular level. Twenty years after the discovery of the first HCM disease gene, genetic studies still confirm that HCM is ...

journal_title：Circulation research

authors： Ashrafian H,McKenna WJ,Watkins H

更新日期：2011-06-24 00:00:00

abstract：:MicroRNAs act as negative regulators of gene expression by inhibiting the translation or promoting the degradation of target mRNAs. Because individual microRNAs often regulate the expression of multiple target genes with related functions, modulating the expression of a single microRNA can, in principle, influence an ...

journal_title：Circulation research

authors： van Rooij E,Marshall WS,Olson EN

更新日期：2008-10-24 00:00:00

abstract：:Cardiac and arterial tissues of six male and six female adult baboons were examined for nuclear uptake of tritiated 5-alpha-dihydrotestosterone (3H-DHT) or tritiated estradiol-17 beta (3H-E2) by autoradiography. 3H-DHT uptake occurred in nuclei of most atrial and ventricular myocardial fibers, no cardiac interstitial ...

journal_title：Circulation research

authors： McGill HC Jr,Sheridan PJ

更新日期：1981-02-01 00:00:00

abstract：:Myocytes overlying a zone of infarction form the primary substrate for serious reentrant ventricular arrhythmias. In vitro and in vivo studies suggest that antiarrhythmic agents affect Na+ channels of cells from the epicardial border zone (EBZ) of the 5-day infarcted heart differently than they affect those of normal ...

journal_title：Circulation research

authors： Pu J,Balser JR,Boyden PA

更新日期：1998-08-24 00:00:00

abstract：:We studied baroreceptor function in dogs before and after surgical repair of coarctation of the aorta by direct recording of multifiber carotid sinus (CS) nerve activity (NA) during alteration of pulsatile arterial pressure with systemic phenylephrine and nitroprusside, and during static pressure changes using a CS po...

journal_title：Circulation research

authors： Igler FO,Boerboom LE,Werner PH,Donegan JH,Zuperku EJ,Bonchek LI,Kampine JP

更新日期：1981-03-01 00:00:00

abstract：:Stimulation of beta-adrenergic receptors (betaARs) causes apoptosis in adult rat ventricular myocytes (ARVMs). The role of reactive oxygen species (ROS) in mediating betaAR-stimulated apoptosis is not known. Stimulation of betaARs with norepinephrine (10 micromol/L) in the presence of prazosin (100 nmol/L) for 24 hour...

journal_title：Circulation research

authors： Remondino A,Kwon SH,Communal C,Pimentel DR,Sawyer DB,Singh K,Colucci WS

更新日期：2003-02-07 00:00:00

abstract：:The synthesis of an angiotensin II (A II) antagonist, sarcosyl1-cysteinyl(S-methyl)8-angiotensin II [Sar1-Cys(Me)8-A II], showing partial organ selectivity and properties of a noncompetitive antagonist, is described. The compound was found to be an extremely potent antagonist on vascular smooth muscle both in vitro (p...

journal_title：Circulation research

authors： Freer RJ,Sutherland JC Jr,Day AR

更新日期：1980-05-01 00:00:00

abstract：:Our previous studies suggested that enhanced fibronectin mRNA translation in ductus arteriosus compared with aortic smooth muscle cells is related to increased expression of light chain 3 (LC3) of microtubule-associated protein 1, which binds an AU-rich element in the 3' untranslated region of fibronectin mRNA. We the...

journal_title：Circulation research

authors： Zhou B,Rabinovitch M

更新日期：1998-09-07 00:00:00

abstract：:Two gap junction proteins, connexin43 (Cx43) and connexin45 (Cx45), are coexpressed in many cardiac and other cells. Homomeric channels formed by these proteins differ in unitary conductance, permeability, and regulation. We sought to determine the ability of Cx43 and Cx45 to oligomerize with each other to form hetero...

journal_title：Circulation research

authors： Martinez AD,Hayrapetyan V,Moreno AP,Beyer EC

更新日期：2002-05-31 00:00:00

abstract：:The objective of this study was to elucidate the mechanisms associated with the reciprocal relation between magnesium and calcium on vascular smooth muscle tone in bovine pulmonary artery and vein. Rapid removal of magnesium from Krebs-bicarbonate medium used to bathe isolated rings of precontracted artery or vein cau...

journal_title：Circulation research

authors： Gold ME,Buga GM,Wood KS,Byrns RE,Chaudhuri G,Ignarro LJ

更新日期：1990-02-01 00:00:00

abstract：:Activin is a member of the transforming growth factor-beta superfamily, and it modulates the proliferation and differentiation of various target cells. In this study, we investigated the role of activin in the initiation and progression of human atherosclerosis. The expression of activin, its physiological inhibitor f...

journal_title：Circulation research

authors： Engelse MA,Neele JM,van Achterberg TA,van Aken BE,van Schaik RH,Pannekoek H,de Vries CJ

更新日期：1999-11-12 00:00:00

abstract：:Compared with the adult, neonatal heart muscle is less sensitive to deactivation by acidic pH. We hypothesized that expression of slow skeletal troponin I (ssTnI), the embryonic isoform, in adult heart would help maintain left ventricular (LV) systolic function during respiratory hypercapnia. We assessed LV function b...

journal_title：Circulation research

authors： Urboniene D,Dias FA,Peña JR,Walker LA,Solaro RJ,Wolska BM

更新日期：2005-07-08 00:00:00

abstract：:Vascular dysfunction in diabetes is attributed to lack of bioavailable nitric oxide (NO) and is postulated as a primary cause of small vessel complications as a result of poor glycemic control. Although it has been proposed that NO is bound by red blood cells (RBCs) and can induce relaxation of blood vessels distal to...

journal_title：Circulation research

authors： James PE,Lang D,Tufnell-Barret T,Milsom AB,Frenneaux MP

更新日期：2004-04-16 00:00:00

abstract：RATIONALE:Transmural dispersion of repolarization has been shown to play a role in the genesis of ventricular tachycardia and fibrillation in different animal models of heart failure (HF). Heterogeneous changes of repolarization within the midmyocardial population of ventricular cells have been considered an important ...

journal_title：Circulation research

authors： Glukhov AV,Fedorov VV,Lou Q,Ravikumar VK,Kalish PW,Schuessler RB,Moazami N,Efimov IR

更新日期：2010-03-19 00:00:00

abstract：:Ectopic calcification of blood vessels, heart valves, and skeletal muscle is a major clinical problem. There is now good evidence that angiogenesis is associated with ectopic calcification in these tissues and that it is necessary, but not sufficient, for calcification to occur. Angiogenesis may regulate ectopic calci...

journal_title：Circulation research

authors： Collett GD,Canfield AE

更新日期：2005-05-13 00:00:00

abstract：:Blockade of angiotensin type 1 (AT1) receptors induces smooth muscle cell (SMC) death and regression of aortic hypertrophy in spontaneously hypertensive rats (SHR). We postulated that SMC death and vascular remodeling in this model may be attenuated by z-Val-Ala-Asp(OMe)-CH2F (z-VAD-fmk), a tripeptide inhibitor of cas...

journal_title：Circulation research

authors： Marchand EL,Der Sarkissian S,Hamet P,deBlois D

更新日期：2003-04-18 00:00:00

abstract：:It is well known that electrical pacing may either terminate or change the rate and/or ECG appearance of reentrant ventricular tachycardia. However, the dynamics of interaction of reentrant waves with waves initiated by external pacing are poorly understood. Prevailing concepts are based on simplistic models in which ...

journal_title：Circulation research

authors： Davidenko JM,Salomonsz R,Pertsov AM,Baxter WT,Jalife J

更新日期：1995-12-01 00:00:00

abstract：:RNA splicing represents a post-transcriptional mechanism to generate multiple functional RNAs or proteins from a single transcript. The evolution of RNA splicing is a prime example of the Darwinian function follows form concept. A mutation that leads to a new mRNA (form) that encodes for a new functional protein (func...

journal_title：Circulation research

authors： van den Hoogenhof MM,Pinto YM,Creemers EE

更新日期：2016-02-05 00:00:00

abstract：:The SCN5A gene encodes the alpha subunit of the human heart sodium channel (hH1), which plays a critical role in cardiac excitability. Mutations of SCN5A underlie Brugada syndrome, an inherited disorder that leads to ventricular fibrillation and sudden death. This study describes changes in cellular localization and f...

journal_title：Circulation research

authors： Baroudi G,Pouliot V,Denjoy I,Guicheney P,Shrier A,Chahine M

更新日期：2001-06-22 00:00:00

abstract：:Chronic hypoxic pulmonary hypertension is associated with profound vascular remodeling and alterations in Ca(2+) homeostasis in pulmonary arterial smooth muscle cells (PASMCs). Recent studies show that transient receptor potential (TRPC) genes, which encode store-operated and receptor-operated cation channels, play im...

journal_title：Circulation research

authors： Lin MJ,Leung GP,Zhang WM,Yang XR,Yip KP,Tse CM,Sham JS

更新日期：2004-09-03 00:00:00

abstract：:In the present study, we established an injury model of the mouse carotid artery. Complete removal of the endothelium was achieved with a flexible wire. A platelet monolayer covered the denuded surface, and damage to underlying medial smooth muscle cells (SMCs) was detected. Injection of [3H]thymidine was used to dete...

journal_title：Circulation research

authors： Lindner V,Fingerle J,Reidy MA

更新日期：1993-11-01 00:00:00

abstract：:Reperfusion of globally ischemic rat hearts causes the generation of inositol(1,4,5)trisphosphate [Ins(1,4,5)P3] and the initiation of arrhythmias. These responses are mediated by alpha1-adrenergic receptors (ARs), but the subtype of receptor involved has not been identified. Under normoxic conditions, hearts from tra...

journal_title：Circulation research

authors： Harrison SN,Autelitano DJ,Wang BH,Milano C,Du XJ,Woodcock EA

更新日期：1998-12-14 00:00:00

abstract：RATIONALE:Microparticles are cell-derived membrane vesicles, relevant to a range of biological responses and known to be elevated in cardiovascular disease. OBJECTIVE:To investigate microparticle release during cardiac stress and how this response differs in those with vascular disease. METHODS AND RESULTS:We measure...

journal_title：Circulation research

authors： Augustine D,Ayers LV,Lima E,Newton L,Lewandowski AJ,Davis EF,Ferry B,Leeson P

更新日期：2014-01-03 00:00:00

abstract：:The aim of the study was to investigate whether the adrenal renin-angiotensin system plays an independent role in the regulation of mineralocorticoid biosynthesis in the adrenal gland and to explore the mechanisms of this action. Twelve-week-old male Sprague-Dawley rats were studied: 22 rats were maintained on a regul...

journal_title：Circulation research

authors： Volpe M,Gigante B,Enea I,Porcellini A,Russo R,Lee MA,Magri P,Condorelli G,Savoia C,Lindpaintner K,Rubattu S

更新日期：1997-11-01 00:00:00

abstract：RATIONALE:Remodeling of the vessel wall and the formation of vascular networks are dynamic processes that occur during mammalian embryonic development and in adulthood. Plaque development and excessive neointima formation are hallmarks of atherosclerosis and vascular injury. As our understanding of these complex proces...

journal_title：Circulation research

authors： Becher T,Riascos-Bernal DF,Kramer DJ,Almonte VM,Chi J,Tong T,Oliveira-Paula GH,Koleilat I,Chen W,Cohen P,Sibinga NES

更新日期：2020-02-28 00:00:00