Abstract:
:Heat shock protein 70 (HSP70) has been shown to play a fundamental role in the induction of thermotolerance in many biological systems. Elevated synthesis of HSP70 in response to diverse stresses such as heat, anoxia, ischaemia, ethanol and heavy metals has been correlated with protection against subsequent more severe stress and cross-tolerance to differing stresses. In this respect, exposure of the mammalian heart to sublethal heat treatment or ischaemia has been shown to protect against subsequent myocardial ischaemia with concomitant elevation of HSP70. However, direct demonstration that HSP70 can alone confer thermotolerance has until recently been restricted to transfection of fibroblasts with an HSP70 gene, although preliminary data from others suggests that transfection of H9c2 myocytes with an HSP70 gene can confer tolerance to substrate-free hypoxia. The purpose of this study was, therefore, to test directly whether a myocyte cell line which retains certain features of cardiac cells (as opposed to non-myocyte cells) can be protected against lethal thermal stress by transfection with a single HSP70 gene. Rat heart-derived H9c2 cells were transfected either with a plasmid from which high level expression of a human HSP70 gene is driven by a strong, heterologous (human) beta-actin promoter (APr-HS70), or with an analogous control plasmid containing no HSP70 gene (pAPr-1 neo). Following selection with the neomycin analogue G418, several clones were isolated which either expressed no HSP70 (control: pAPr-1 neo-derived) or stably expressed high constitutive levels of an inducible isoform of HSP70 (HSP70i) (APr-HS70-derived) as determined by Western blotting with a specific monoclonal antibody to HSP70i.(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
J Mol Cell Cardioljournal_title
Journal of molecular and cellular cardiologyauthors
Heads RJ,Latchman DS,Yellon DMdoi
10.1006/jmcc.1994.1084subject
Has Abstractpub_date
1994-06-01 00:00:00pages
695-9issue
6eissn
0022-2828issn
1095-8584pii
S0022-2828(84)71084-4journal_volume
26pub_type
杂志文章abstract::Ischemia-induced myocardial potassium loss and post-ischemic potassium reuptake was quantitated in 8 open chest pigs during control conditions and during hemodynamic alterations which have been shown to increase steady state sarcolemmal potassium fluxes. Myocardial K+ balance was continuously computed before, during a...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/0022-2828(89)90673-1
更新日期:1989-12-01 00:00:00
abstract::The cardiac voltage-gated Na(+) channel, Na(V)1.5, is responsible for the upstroke of the action potential in cardiomyocytes and for efficient propagation of the electrical impulse in the myocardium. Even subtle alterations of Na(V)1.5 function, as caused by mutations in its gene SCN5A, may lead to many different arrh...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章,评审
doi:10.1016/j.yjmcc.2015.02.013
更新日期:2015-05-01 00:00:00
abstract::We have recently shown that norepinephrine (NE) pretreatment attenuates Ca2+ overloading in cardiac rat trabeculae during metabolic inhibition (MI) with NaCN (2 mmol/l), and improves contractile recovery during a subsequent recovery period (RP). In the present study, we investigated the effects of the continuous prese...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1006/jmcc.1997.0617
更新日期:1998-02-01 00:00:00
abstract::Nitric oxide, which is produced endogenously within cardiac myocytes by three distinct isoforms of nitric oxide synthase, is a key regulator of myocardial function. This review will focus on the regulation of myocardial function by each nitric oxide synthase isoform during health and disease, with a specific emphasis ...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章,评审
doi:10.1016/j.yjmcc.2008.07.015
更新日期:2008-11-01 00:00:00
abstract::Local signaling domains and numerous interacting molecular pathways and substrates contribute to the whole-cell response of myocytes during β-adrenergic stimulation (βARS). We aimed to elucidate the quantitative contribution of substrates and their local signaling environments during βARS to the canine epicardial vent...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/j.yjmcc.2011.02.007
更新日期:2011-05-01 00:00:00
abstract::During systole, Ca2+ is released from the sarcoplasmic reticulum (SR) through ryanodine receptors (RyRs) while, simultaneously, other ions (specifically K+, Mg2+, and Cl-) provide counter-ion flux. These ions move back into the SR during diastole through the SERCA pump and SR K+ and Cl- channels. In homeostasis, all i...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/j.yjmcc.2016.10.018
更新日期:2017-02-01 00:00:00
abstract::Clinical studies suggest increased arrhythmia risk associated with cell therapy for myocardial infarction (MI); however, the underlying mechanisms are poorly understood. We hypothesize that the degree of electrical viability in the infarct and border zone associated with skeletal myoblast (SKMB) or mesenchymal stem ce...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/j.yjmcc.2006.09.011
更新日期:2007-02-01 00:00:00
abstract::This study addresses the role of polyamines and their rate limiting enzyme, ornithine decarboxylase in regulation of macromolecular transport of two macromolecules, fluorescein and horseradish peroxidase, across coronary capillaries. Rat hearts were isolated and retrogradely perfused through the aorta (Langendorff met...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1006/jmcc.1994.1046
更新日期:1994-03-01 00:00:00
abstract::Although protection against necrosis has been observed in both hibernating (HIB) and ischemic preconditioned hearts in the second window of protection (SWOP), a comparison of the mitochondrial proteome between the two entities has not been previously performed. Anesthetized swine underwent instrumentation with a fixed...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/j.yjmcc.2013.03.018
更新日期:2013-07-01 00:00:00
abstract::We investigated the expression pattern of the heterotrimeric G proteins Gs alpha, Gi alpha-2 and Go alpha in rat and guinea-pig heart by in situ hybridization. Cryosections were hybridized with single-stranded 35S-cRNA probes complementary to subtype-specific sequences of the respective mRNAs. Hybridization signals we...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/s0022-2828(95)91659-8
更新日期:1995-10-01 00:00:00
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 inotropi...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/s0022-2828(87)80368-1
更新日期:1987-06-01 00:00:00
abstract::Previously, we demonstrated that acute exposure to superfusate containing verapamil suppresses action potential plateau to a greater degree in cells at the tip of the anterior papillary muscle compared to those at its base in normal cat left ventricle (LV) studied in tissue bath. To determine the effects of chronic pr...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/s0022-2828(86)80469-2
更新日期:1986-02-01 00:00:00
abstract:AIMS:In response to vascular injury, vascular smooth muscle cells (VSMC) may change from a contractile phenotype to a proliferative phenotype and consequently become conducive to neointima formation. Apoptosis repressor with caspase recruitment domain (ARC) was initially discovered as an endogenous apoptosis inhibitor,...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/j.yjmcc.2020.08.003
更新日期:2020-10-01 00:00:00
abstract::The effects of fentanyl on ultrastructure, protein biosynthesis, and atrial natriuretic peptide (ANP) secretion were studied in neonatal rat cardiomyocytes (CM). Ventricles from 2-day-old American Wistar rats were digested with 1% collagenase in perfusion buffer. Eight hundred thousand to 1.0 million cells/ml were inc...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1006/jmcc.1994.1053
更新日期:1994-04-01 00:00:00
abstract::In this article we review the late Na current which functionally can be measured using patch-clamp electrophysiology (INa,late). This current is largely enhanced under pathological myocardial conditions such as ischemia and heart failure. In addition, INa,late can cause systolic and diastolic contractile dysfunction v...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章,评审
doi:10.1016/j.yjmcc.2013.03.001
更新日期:2013-08-01 00:00:00
abstract::CD34+ progenitor cells hold promise for therapeutic neovascularization in various settings. In this study, the role of human peripheral blood CD34+ cells in neovascularization and inflammatory cell recruitment was longitudinally studied in vivo. Human CD34+ cells were incorporated in Matrigel, implanted subcutaneously...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/j.yjmcc.2007.03.907
更新日期:2007-06-01 00:00:00
abstract::Reperfusion or reoxygenation of ischaemic or hypoxic cardiac tissue results in increases in total cell calcium and cell lysis both of which are dependent on mitochondrial function. Although changes which occur during this period of exposure of the tissue to hypoxia predispose the heart to take up calcium on reoxygenat...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1006/jmcc.1993.1107
更新日期:1993-08-01 00:00:00
abstract::Human immunodeficiency virus (HIV, lentivirus) type-1 based vectors have a number of attractive features for gene therapy, including the ability to transduce non-dividing cells and long term transgene expression. We used a three-plasmid expression system to generate pseudotyped lentivirus-based vectors by transient tr...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1006/jmcc.1999.1035
更新日期:1999-11-01 00:00:00
abstract::We investigated the role of neuropeptide Y (NPY), abundant in the myocardial sympathetic nervous system and endothelial cells, in angiogenesis during chronic myocardial ischemia. Adult male Yorkshire swine underwent ameroid constrictor placement on the proximal left circumflex coronary artery. After 3 weeks, an osmoti...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/j.yjmcc.2010.08.022
更新日期:2010-12-01 00:00:00
abstract::Beta-adrenoceptor is over-stimulated during myocardial ischemia, in which hydrogen sulphide (H2S) concentration was found to be lowered. The present study attempted to investigate if H2S modulates beta-adrenoceptor function and the underlying mechanism. We examined the effect of NaHS (a H2S donor) on myocyte contracti...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/j.yjmcc.2008.01.007
更新日期:2008-04-01 00:00:00
abstract::Energy metabolism of quiescent cardiac muscle was studied in the isolated rabbit heart preparation perfused at constant pressure by the Langendorff technique. Oxygen consumption (MVo2), coronary flow rate (CFR) and the steady state concentrations of high energy phosphate compounds were determined in hearts rendered as...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/0022-2828(89)90863-8
更新日期:1989-02-01 00:00:00
abstract::Lysophosphatidylcholine (LPC) accumulation in intracellular and/or interstitial space in cardiomyocytes may underlie as a mechanism for tachycardia and various arrhythmias during cardiac ischemia, which is usually accompanied by elevation of intracellular Ca(2+) concentration ([Ca(2+)](i)). The present study was there...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/j.yjmcc.2009.08.032
更新日期:2010-01-01 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::Left ventricular hypertrophy may lead to heart failure. The transition between hypertrophy and heart failure is, however, incompletely understood. On the cellular level, human heart failure is characterized by alterations in Ca(2+)-cycling proteins and beta-adrenergic receptor density, but the hypertrophied human hear...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1006/jmcc.2001.1390
更新日期:2001-06-01 00:00:00
abstract::This study examined the potential role of ET-1 and the contribution of protein kinase C (PKC) in the desensitization of the ET-1 transmembrane signaling pathway in the left circumflex coronary artery (CCA) of a dog model of congestive heart failure (CHF). In the CCA of the rapid ventricular pacing-overdrive dog model ...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1006/jmcc.1993.1102
更新日期:1993-08-01 00:00:00
abstract::The existing literature indicates a crucial role of p38 MAP (mitogen-activated protein) kinase (p38MAPK) and its downstream target MAPKAP kinase 2 (MK2) in ischemic preconditioning (IPC). Accordingly, deletion of MK2 gene should abolish the cardioprotective ability of IPC. Interestingly, we were able to partially prec...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章,收录出版
doi:10.1016/j.yjmcc.2007.02.010
更新日期:2007-05-01 00:00:00
abstract::Milrinone, a potent positive inotropic and vasodilating agent, has shown promise in the clinical treatment of congestive heart failure, but significant controversy about its mechanism of action exists. To approach these mechanistic problems in a non-innervated, non-diffusion-limited system, the effects of milrinone on...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/s0022-2828(87)80548-5
更新日期:1987-01-01 00:00:00
abstract::The rapid application of caffeine to cardiac myocytes is commonly used to assess changes in the Ca2+ content of the sarcoplasmic reticulum (SR) and to study other parameters of intracellular Ca2+ regulation. Here we examined the effects of rapid caffeine application on membrane potential, intracellular Ca2+, and cell ...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1006/jmcc.1998.0782
更新日期:1998-11-01 00:00:00
abstract::Platelet-derived growth factor (PDGF) has protean manifestations, including the regulation of growth and migration, in many cell types. We have previously reported that PDGF-BB induces the accumulation of monocyte chemoattractant protein (MCP)-1 mRNA in smooth muscle cells (SMC), in large part due to an increase in mR...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/j.yjmcc.2006.03.426
更新日期:2006-07-01 00:00:00
abstract::Echocardiographic dimensions and endocrinological examination were performed in 71 young patients with borderline hypertension (BHT) and 31 age-matched normotensive subjects (NT). Patients with BHT had significantly higher relative wall thickness (RWT) and left ventricular mass index than NT, although all BHT patients...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/0022-2828(89)90769-4
更新日期:1989-12-01 00:00:00