Abstract：
:The isometric twitch properties of papillary muscles from hearts of 30- to 53-day-old cardiomyopathic hamsters (BIO 14.6) were studied before and after exposure to the cardiac glycoside, ouabain. The diseased tissue was weakly responsive to ouabain (3 to 100 microM), as compared to a more appreciable positive inotropic response in papillary muscle of similarly aged normal hamsters (BIO F1B). These data suggest that the activity of Na+,K+-ATPase is attenuated in the diseased sarcolemma. Pretreatment with the beta-adrenoceptor agonist, isoproterenol (0.1 microM), slightly increased the sensitivity of normal muscle to ouabain, however the response of myopathic muscle was greatly enhanced. These findings may be of significance to the genesis of cellular calcium overload hypothesized to be involved in the necrosis and degeneration of heart cells in this animal model of genetic cardiomyopathy.
journal_name
J Mol Cell Cardioljournal_title
Journal of molecular and cellular cardiologyauthors
Rossner KL,Mascarenhas DAdoi
10.1016/s0022-2828(87)80368-1subject
Has Abstractpub_date
1987-06-01 00:00:00pages
627-32issue
6eissn
0022-2828issn
1095-8584pii
S0022-2828(87)80368-1journal_volume
19pub_type
杂志文章abstract：:Studies using chemically-induced models of diabetes have shown the diabetic myocardium to exhibit abnormalities in cellular ion transport, which may affect susceptibility to reperfusion-induced arrhythmias. We studied the incidence of reperfusion-induced ventricular tachycardia (VT) and fibrillation (VF) in isolated h...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/0022-2828(92)93195-p
更新日期：1992-04-01 00:00:00
abstract：:Diabetes is recognized as an independent risk factor for cardiovascular morbidity and mortality. This is due, in large part, to premature atherosclerosis, enhanced thrombogenicity and activation of systemic inflammatory programs with resultant vascular dysfunction. More enigmatic mechanisms underpinning diabetes-assoc...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章,评审
doi：10.1016/j.yjmcc.2009.02.001
更新日期：2009-06-01 00:00:00
abstract：:Cardioprotection and preconditioning mediated via G-protein-coupled receptors may be lost or impaired with advancing age, limiting ischemic tolerance and the ability to pharmacologically protect older hearts from ischemic injury. Our preliminary findings indicated a loss of delta-opioid receptor-mediated protection in...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2007.02.011
更新日期：2007-05-01 00:00:00
abstract：:To examine some of the characteristics of the local noradrenaline (NA) release in myocardial ischemia a study was made on Langendorff-perfused rat hearts, prelabelled with 3H-NA. The left coronary artery was ligated for 15, 30, 60 or 120 min, followed by 10 min of reperfusion. The coronary effluent was collected and a...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/0022-2828(83)90344-9
更新日期：1983-12-01 00:00:00
abstract：:Cardiotrophin-1 (CT-1) is a heart-targeting cytokine that is increased in the metabolic syndrome due to overexpression in the adipocytes. The effects of CT-1 on cardiomyocyte substrate metabolism remain unknown. We therefore determined the effects of CT-1 on basal and stimulated glucose transport in cardiomyocytes exp...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2012.12.015
更新日期：2013-03-01 00:00:00
abstract：:We examined metabolic effects of "supply" and "demand" ischemia in immature and mature rabbit hearts. Moderate supply ischemia was produced by a 50% reduction in coronary flow (to approximately 5.0 ml min-1 g-1 giving a 50-55% rise in O2 extraction and a 35% drop in O2 supply/demand). Demand ischemia was produced by s...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.1996.0105
更新日期：1996-05-01 00:00:00
abstract：:Normal atrial conduction requires similar abundances and homogeneous/overlapping distributions of two connexins (Cx40 and Cx43). The remodeling of myocyte connections and altered electrical conduction associated with atrial fibrillation (AF) likely involves perturbations of these connexins. We conducted a comprehensiv...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2014.08.021
更新日期：2014-11-01 00:00:00
abstract：:Cardiac hypertrophy is characterized, among others, by the molecular events which selectively activate the expression of genes for contractile proteins within individual myocardial cells. As such, myosin light chain 2 (MLC-2), which is upregulated in the hypertrophic state in both rat and human, serves as a marker for...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/s0022-2828(95)92019-6
更新日期：1995-10-01 00:00:00
abstract：:To understand better the pathophysiological roles of the vagal efferent system in ischemic heart diseases, we examined endogenous acetylcholine (ACh) release in the myocardium in vivo. Acute myocardial ischemia was induced in anesthetized cats by a 60-min occlusion of the left anterior descending coronary artery (LAD)...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.1999.1087
更新日期：2000-03-01 00:00:00
abstract：:Aquaporins (AQPs) are a family of water channel proteins that assist in maintenance of the cellular osmotic environment and whole body fluid balance. Specialized organ-specific AQPs are important in physiologic and pathologic processes but little is known about AQPs in the human heart. AQP1 has been identified in rode...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2004.01.009
更新日期：2004-05-01 00:00:00
abstract：:Familial hypertrophic cardiomyopathy (HCM), linked to mutations in myosin, myosin-binding proteins and other sarcolemmal proteins, is associated with increased risk of life threatening ventricular arrhythmias, and a number of animal models have been developed to facilitate analysis of disease progression and mechanism...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2017.01.006
更新日期：2017-02-01 00:00:00
abstract：:The effects of Cobra venom cardiotoxin (CTX) on the cellular morphology, twitch amplitude and intracellular calcium ([Ca2+]i) of the ventricular myocytes were studied. [Ca2+]i and twitch amplitude were determined with a fluorometric ratio method using Fura-2/AM and Calcium Green-1 as calcium indicators, and a videomic...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.1997.0511
更新日期：1997-10-01 00:00:00
abstract：:The activation of NO/cGMP pathways can induce pro-apoptotic pathways in cardiomyocytes although only a small number of cardiomyocytes fulfill the criteria of apoptosis. The same pathways reduce the contractile performance of cardiomyocytes. In the present study, we tested the hypothesis that exposure of cells to NO/cG...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2006.10.012
更新日期：2007-02-01 00:00:00
abstract：:In cardiomyocytes, Ca(2+) plays a central role in governing both contraction and signaling events that regulate gene expression. Current evidence indicates that discrimination between these two critical functions is achieved by segregating Ca(2+) within subcellular microdomains: transcription is regulated by Ca(2+) re...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章,评审
doi：10.1016/j.yjmcc.2014.06.015
更新日期：2014-10-01 00:00:00
abstract：:Several investigators have demonstrated that the opioid pathway is involved in tissue preservation during hypoxia or ischemia and that this protection is mediated via the delta (delta)-opioid receptor. Subsequently, we have shown that opioid receptors are involved in ischemic preconditioning (PC) in the rat heart and ...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.1997.0454
更新日期：1997-08-01 00:00:00
abstract：:The coronary collateral circulation is critically important as an adaptation of the heart to prevent the damage from ischemic insults. In their native state, collaterals in the heart would be classified as part of the microcirculation, existing as arterial-arterial anastomotic connections in the range of 30 to 100 μM ...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章,评审
doi：10.1016/j.yjmcc.2011.12.006
更新日期：2012-04-01 00:00:00
abstract：:Pacemaker (HCN) channels have a key role in the generation and modulation of spontaneous activity of sinoatrial node myocytes. Previous work has shown that compartmentation of HCN4 pacemaker channels within caveolae regulates important functions, but the molecular mechanism responsible is still unknown. HCN channels h...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2012.05.013
更新日期：2012-08-01 00:00:00
abstract：:Pyroptosis is a pro-inflammatory form of programmed cell death, whose genesis directly depended on caspase-1 activation. Pulmonary hypertension (PH) is a disease characterized, in part, by vascular fibrosis. Up to now, there is no report on the relationship between pyroptosis and vascular fibrosis in PH. Here, we conf...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2019.10.008
更新日期：2020-01-01 00:00:00
abstract：:The Ca(2+) dependent interaction between troponin I (cTnI) and troponin C (cTnC) triggers contraction in heart muscle. Heart failure is characterized by a decrease in cardiac output, and compounds that increase the sensitivity of cardiac muscle to Ca(2+) have therapeutic potential. The Ca(2+)-sensitizer, levosimendan,...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2010.08.019
更新日期：2010-12-01 00:00:00
abstract：BACKGROUND:Cardiac injury, as measured by troponin elevation, has been reported among hospitalized coronavirus disease 2019 (COVID-19) patients and portends a poor prognosis. However, how the dynamics of troponin elevation interplay with inflammation and coagulation biomarkers over time is unknown. We assessed longitud...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2020.08.008
更新日期：2020-10-01 00:00:00
abstract：:The heart contains many cell types; mechanical work is done by cardiomyocytes which do not divide but are terminally differentiated and capable of continuous protein synthesis and degradation. The steps in protein synthesis are (1) transport of amino acids into heart cells by a variety of cell-membrane carriers, (2) A...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章,评审
doi：10.1016/s0022-2828(84)80711-7
更新日期：1984-01-01 00:00:00
abstract：:Spectrin is a large, flexible protein that stabilizes membranes and organizes proteins and lipids into microdomains in intracellular organelles and at the plasma membrane. Alternative splicing occurs in spectrins, but it is not yet clear if these small variations in structure alter spectrin's functions. Three alternat...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2010.01.001
更新日期：2010-06-01 00:00:00
abstract：:Phosphorylation of myosin binding protein C (MyBP-C) was investigated in intraventricular septum samples taken from patients with hypertrophic cardiomyopathy undergoing surgical septal myectomy. These samples were compared with donor heart muscle, as a well-characterised control tissue, and with end-stage failing hear...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2008.05.020
更新日期：2008-08-01 00:00:00
abstract：:Cardiac hypertrophy is associated with modifications in Ca2+ transport processes, enzymes of energy metabolism and antioxidant capacity. It is unknown whether these changes occur in infarct-induced hypertrophy with regard to an altered susceptibility to ischemia/reperfusion injury. We examined changes in sarcoplasmic ...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.1998.0794
更新日期：1998-11-01 00:00:00
abstract：:The aim of this study was to investigate the effects of aging on the profile of myocardial substrate utilization and cardiac function using a physiological profile of substrates. Hearts from 6-, 15- and 24-month male Wistar rats were perfused in the isovolumic Langendorff mode, with physiological concentrations of 13C...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2005.09.018
更新日期：2006-01-01 00:00:00
abstract：:Tetrahydrobiopterin (BH(4)) is an essential cofactor for aromatic amino acid hydroxylases and for all three nitric oxide synthase (NOS) isoforms. It also has a protective role in the cell as an antioxidant and scavenger of reactive nitrogen and oxygen species. Experimental studies in humans and animals demonstrate tha...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章,评审
doi：10.1016/j.yjmcc.2011.03.009
更新日期：2011-10-01 00:00:00
abstract：:Cardiac arrhythmias are one of the main causes of death worldwide. Several studies have shown that inflammation plays a key role in different cardiac diseases and Toll-like receptors (TLRs) seem to be involved in cardiac complications. In the present study, we investigated whether the activation of TLR4 induces cardia...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2014.08.012
更新日期：2014-11-01 00:00:00
abstract：:Common cardiovascular diseases such as hypertension and myocardial infarction require that myocytes develop greater than normal force to maintain cardiac pump function. This requires increases in [Ca(2+)]. These diseases induce cardiac hypertrophy and increases in [Ca(2+)] are known to be an essential proximal signal ...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2012.08.005
更新日期：2012-11-01 00:00:00
abstract：:The effects of adenosine on myocardial substrate utilization were assessed in isolated Langendorff-perfused rat hearts. In unpaced hearts perfused at constant flow with insulin, adenosine inhibited oxidation of both glucose and palmitate with similar dose-dependency, without significant effects on effluent lactate+pyr...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/0022-2828(92)93153-b
更新日期：1992-02-01 00:00:00
abstract：:Densitometric scanning of SDS-polyacrylamide gels was used to measure myosin heavy chain concentration in left ventricular specimens obtained from cat hearts 3 to 12 months after healing of small experimental myocardial infarctions. The study was designed to test the hypothesis that myosin concentration varies as a fu...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/s0022-2828(84)80642-2
更新日期：1984-06-01 00:00:00
