Abstract:
:To test the hypothesis that alterations in adrenergic or cholinergic receptors occur in response to physical training, and that changes in receptor properties could be mechanistically important in producting the altered cardiovascular physiology of the trained state, we studied the effects of endurance training by swimming upon beta adrenergic, alpha adrenergic, and muscarinic cholinergic receptors of rat heart. Because of previously reported sex-related differences in the cardiac adaptation to training, male and female rats were studied separately. Despite the occurrence of demonstrable training bradycardia in males, and of cardiac hypertrophy in females, there were no discernible effects of the training program upon the properties of cardiac beta adrenergic receptors. However, hearts from swimmers of both sexes demonstrated fewer numbers of muscarinic cholinergic and alpha adrenergic receptors than sedentary controls, without differences in the receptor affinities for antagonist or agonist compounds. These findings are inconsistent with the hypothesis that altered cardiac sensitivity to neurotransmitters contributes directly to training bradycardia.
journal_name
J Mol Cell Cardioljournal_title
Journal of molecular and cellular cardiologyauthors
Williams RS,Schaible TF,Bishop T,Morey Mdoi
10.1016/s0022-2828(84)80611-2subject
Has Abstractpub_date
1984-05-01 00:00:00pages
395-403issue
5eissn
0022-2828issn
1095-8584journal_volume
16pub_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::Preconditioning of hearts with the α(1)-adrenoceptor agonist phenylephrine decreases infarct size and increases the functional recovery of the heart following ischaemia-reperfusion. However, the cellular mechanisms responsible for this protection are not known. We investigated the role of protein kinase C ε and δ (PKC...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/j.yjmcc.2011.06.015
更新日期:2011-09-01 00:00:00
abstract::Immediate post-receptor events following alpha-adrenoceptor stimulation in cardiac ventricular muscle are still largely unknown. Since membrane redox systems appear to be present in cell plasma membranes and may be involved in trans-sarcolemma electron efflux, the possibility that Ca2+ inflow was controlled by electro...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/s0022-2828(86)80462-x
更新日期:1986-11-01 00:00:00
abstract:BACKGROUND:Statins have been shown to increase the level of circulating progenitor cells in peripheral blood supposedly due to a mobilization of progenitor cells from the bone marrow niche. Osteoclast/osteoblast interaction has been associated with progenitor cell mobilization. Here, we investigated the role of statins...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/j.yjmcc.2012.12.018
更新日期:2013-04-01 00:00:00
abstract::The mitochondrial permeability transition, an established mechanism for heart diseases, is a long-standing mystery of mitochondrial biology and a prime drug target for cardioprotection. Several hypotheses about its molecular nature have been put forward over the years, and the prevailing view is that permeabilization ...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/j.yjmcc.2020.05.014
更新日期:2020-07-01 00:00:00
abstract:AIMS:One unaddressed aspect of healing after myocardial infarction (MI) is how non-myocyte cells that survived the ischemic injury, keep withstanding additional cellular damage by stress forms typically arising during the post-infarction inflammation. Here we aimed to determine if cell survival is conferred by expressi...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/j.yjmcc.2020.10.013
更新日期:2020-10-30 00:00:00
abstract::Cell-based therapy after myocardial infarction (MI) is a promising therapeutic option but the relevant cell subsets and dosage requirements are poorly defined. We hypothesized that cell therapy for myocardial infarction is improved by ex vivo expansion and high-dose transplantation of defined hematopoietic progenitor ...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/j.yjmcc.2008.06.010
更新日期:2008-09-01 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::Neutrophil recruitment and activation are principal events in inflammation. Upon activation neutrophils release myeloperoxidase (MPO), a heme enzyme, which binds to and transcytoses endothelial cells. Whereas the significance of the subendothelial deposition of MPO has evolved as a critical prerequisite for the enzyme...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/j.yjmcc.2013.12.007
更新日期:2014-04-01 00:00:00
abstract::The interaction of verapamil and other phenylalkylamine calcium channel blockers with the 1,4-dihydropyridine receptor was examined. Studies characterizing the interaction and relationship between calcium channel blocking potency and binding affinity were performed in rat myocardium. The 1,4-dihydropyridines, nifedipi...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/s0022-2828(86)80010-4
更新日期:1986-09-01 00:00:00
abstract::Fibrosis, a consequence of tissue repair, can become a final common pathway to organ failure, if progressive. Prevention and regression of organ fibrosis represent targets of considerable interest. The natural fate of fibrosis differs among various tissues being either persistent, progressive or regressive. Cellular a...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1006/jmcc.1999.0944
更新日期:1999-05-01 00:00:00
abstract::The agent 2,3-butanedione monoxime (BDM) has been reported to reduce the sensitivity of myofilament force development to calcium ions, without affecting the calcium transient in myocardium. One would predict, therefore, that BDM should reduce the contractile state of the heart without reducing the amount of oxygen tha...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/0022-2828(92)91093-k
更新日期:1992-08-01 00:00:00
abstract::We determined whether the dilated cardiomyopathy which develops between 30 and 140 days of age in the Syrian hamster strain MS200, before the onset of cardiac hypertrophy and failure, is associated with alterations in both the action potential (AP) and the Ca(2+)-independent transient outward current, Ito1. AP was rec...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1006/jmcc.1996.0036
更新日期:1996-02-01 00:00:00
abstract::Although the myocardium is capable of utilizing both glucose and fatty acid substrates, glucose metabolism is inhibited in the presence of fatty acid during normal perfusion conditions. Fatty acid regulation of glucose utilization in intact beating rat hearts was studied with 13C-enriched substrates and 13C and 31P NM...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/0022-2828(89)90787-6
更新日期:1989-05-01 00:00:00
abstract:BACKGROUND:Inflammatory serine proteases (ISPs) play an important role in cardiac repair after injury through hydrolysis of dead cells and extracellular matrix (ECM) debris. Evidence also suggests an important role of ISPs in the coordination of the inflammatory response. However, the effect of ISPs on inflammation is ...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/j.yjmcc.2019.06.016
更新日期:2019-09-01 00:00:00
abstract::Peroxynitrite and hydroxyl radical are reactive oxidants produced during myocardial reperfusion injury. In various cell types, including macrophages and smooth muscle cells, peroxynitrite and hydrogen peroxide cause DNA single strand breakage, which triggers the activation of the nuclear enzyme poly (ADP-ribose) synth...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1006/jmcc.1997.0496
更新日期:1997-09-01 00:00:00
abstract::In general, in most organ systems, intracellular protein homeostasis is the sum of many factors, including chromosomal state, protein synthesis, post-translational processing and transport, folding, assembly and disassembly into macromolecular complexes, protein stability and clearance. In the heart, there has been a ...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章,评审
doi:10.1016/j.yjmcc.2013.12.015
更新日期:2014-06-01 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::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:BACKGROUND:Cardiovascular fibrosis is a major contributor to cardiovascular disease, the primary cause of death in patients with chronic kidney disease (CKD). We previously reported expression of endogenous Klotho in human arteries, and that CKD is a state of Klotho deficiency, resulting in vascular calcification, but ...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/j.yjmcc.2019.09.004
更新日期:2019-11-01 00:00:00
abstract::Aftercontractions induced by beta-adrenoceptor stimulation in human and guinea-pig cardiomyocytes may be related to changes in action potential duration (APD). We investigated the effects of altering APD during the occurrence of isoproterenol-induced aftercontractions, using the KATP channel openers cromakalim and lem...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1006/jmcc.1997.0385
更新日期:1997-05-01 00:00:00
abstract::Lack of endothelial nitric oxide synthase (eNOS) may affect the sensitivity of cyclic GMP signaling through soluble guanylyl cyclase (sGC). We hypothesized that in eNOS knockout (eNOS-/-) mice, stimulation of guanylyl cyclase would have enhanced effects inhibiting cardiac contraction. We measured cell shortening and c...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/j.yjmcc.2005.08.008
更新日期:2005-12-01 00:00:00
abstract::Function and various parameters of myocardial substrate and energy metabolism were measured in preload-controlled isolated working guinea-pig hearts perfused with normoxic (95% O2) and hypoxic (30 to 45% O2) Krebs-Henseleit buffers ([Ca2+] = 1.25 mM). Energy-yielding substrates were glucose, pyruvate, lactate, and fat...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/s0022-2828(86)80905-1
更新日期:1986-04-01 00:00:00
abstract::There is currently a growing global burden of valvular heart diseases due to aging populations and changing lifestyles. Valvular heart diseases mainly include the malfunctioning of aortic and mitral valves and are characterized by extensive tissue remodeling, which includes calcification, endothelial dysfunction, and ...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章,评审
doi:10.1016/j.yjmcc.2020.03.015
更新日期:2020-05-01 00:00:00
abstract::Therapeutic angiogenesis can be induced by the implantation of bone marrow cells (BMCs). However, the mechanism of BMC-mediated neovascularization remains to be clarified. We investigated the differential activities of bone marrow subpopulations in angiogenesis and cytokine production. BMCs were separated into positiv...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/j.yjmcc.2007.08.001
更新日期:2007-11-01 00:00:00
abstract::We used three interventions to test critically the theory that ischemic preconditioning is the result of translocation of cytosolic protein kinase C (PKC) into the membranes where it can be activated. If that theory were true then kinase activity should not be necessary during the preconditioning ischemia and thus blo...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1006/jmcc.1994.1078
更新日期:1994-05-01 00:00:00
abstract::Frequency-dependent acceleration of relaxation (FDAR) is an important intrinsic mechanism that allows for diastolic filling of the ventricle at higher heart rates, yet its molecular mechanism is still not understood. Previous studies showed that FDAR is dependent on functional sarcoplasmic reticulum (SR) and can be ab...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/j.yjmcc.2006.12.007
更新日期:2007-03-01 00:00:00
abstract::Connexin40 (Cx40) and connexin45 (Cx45) are involved in both cardiac morphogenesis and propagation of electrical activity. We found that Cx40/Cx45 double deficiency (Cx40(-/-)/Cx45(+/-)) causes a variety of cardiac defects leading to high mortality during embryonic development and at birth. The majority of Cx40(-/-)/C...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1016/j.yjmcc.2006.07.005
更新日期:2006-11-01 00:00:00
abstract::Understanding the process of Ca(2+)/Mg(2+)exchange during muscle excitation and relaxation is fundamental to elucidating the mechanism of Ca(2+)-regulated muscle contraction. During the resting phase, the C-domain of cardiac troponin C may be occupied by either Ca(2+)or Mg(2+). Here, complexes of recombinant cardiac t...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1006/jmcc.2000.1174
更新日期:2000-08-01 00:00:00
abstract::We made novel measurements of the influence of rest intervals and stimulation frequency on twitch contractions and on sarcoplasmic reticulum (SR) Ca(2+)-content (using rapid cooling contractures, RCCs) in isolated ventricular muscle strips from rat and rabbit hearts at a physiological temperature of 37 degrees C. In a...
journal_title:Journal of molecular and cellular cardiology
pub_type: 杂志文章
doi:10.1006/jmcc.2000.1252
更新日期:2000-12-01 00:00:00