Abstract：
:To investigate the interaction of cytoskeleton with the receptor modulation of ionic currents, we studied the effect of muscarinic and beta-adrenergic stimulation in adult guinea-pig ventricular cardiac myocytes treated with paclitaxel and colchicine, two drugs that respectively stabilize or destabilize microtubules. We observed that the stabilization of microtubules with paclitaxel (1 microM for 1-4 h) did not markedly affect either the kinetics of I(Ca), or the stimulatory effect of isoproterenol (Iso, 1 microM); however paclitaxel significantly blunted the response to carbachol (CCh, 1 microM). In agreement with the electrophysiological measurements, Iso induced a similar enhancement of intracellular cAMP levels in both control and paclitaxel-treated cells, while the response to CCh 1 microM was significantly reduced in paclitaxel-treated cells. The reduction of muscarinic response induced by paclitaxel was also evident in atrial cells, in which the stimulation of I(KACh) by CCh 1 microM was reduced to about 10%. Compared to the muscarinic response, paclitaxel did not have significant effect on the purinergic (adenosine 1-10 microM) modulation of I(Ca). In contrast to paclitaxel, in colchicine-treated cells, I(Ca) was not enhanced by beta-adrenergic stimulation, but instead reduced by CCh, even in the absence of previous stimulation. In conclusion, our data suggest that microtubule stabilization significantly affects the muscarinic modulation of I(Ca), by interacting with the receptor or the G-protein rather than on the intracellular signaling cascade.
journal_name
J Mol Cell Cardioljournal_title
Journal of molecular and cellular cardiologyauthors
Malan D,Gallo MP,Bedendi I,Biasin C,Levi RC,Alloatti Gdoi
10.1016/s0022-2828(02)00312-7keywords:
subject
Has Abstractpub_date
2003-02-01 00:00:00pages
195-206issue
2eissn
0022-2828issn
1095-8584pii
S0022282802003127journal_volume
35pub_type
杂志文章abstract：:Serine/threonine protein phosphatases control dephosphorylation of numerous cardiac proteins, including a variety of ion channels and calcium-handling proteins, thereby providing precise post-translational regulation of cardiac electrophysiology and function. Accordingly, dysfunction of this regulation can contribute ...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章,评审
doi：10.1016/j.yjmcc.2016.12.009
更新日期：2017-02-01 00:00:00
abstract：:We investigated whether parathyroid hormone-related peptide (PTH-rP), recently found expressed in the heart, exerts growth and contractile effects on adult cardiomyocytes from rat hearts. Synthetic PTH-rP peptides were used covering either a protein kinase C (PKC)-activating domain [PTH-rP(107-111)], or an adenylate c...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.1997.0520
更新日期：1997-11-01 00:00:00
abstract：:Phospholamban (PLN) is a key regulator of cardiac contraction and relaxation through its inhibition of the sarco/endoplasmic reticulum Ca(2+)-ATPase (SERCA2a). The inhibitory effect is attenuated upon protein kinase A (PKA) dependent phosphorylation of PLN. PLN exists in an equilibrium of pentamers and monomers. While...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2014.12.020
更新日期：2015-03-01 00:00:00
abstract：RATIONALE:Circulating monocytes play pivotal roles in chronic inflammatory diseases. Epoxyeicosatrienoic acids (EETs), metabolites of arachidonic acid, are known to have anti-inflammatory effects and are hydrolyzed by soluble epoxide hydrolase (sEH). OBJECTIVE:We aimed to investigate the effect of sEH inhibition in at...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2016.08.001
更新日期：2016-09-01 00:00:00
abstract：:Changes in the capacities of ATP-synthesizing reactions were analysed in residual non-infarcted myocardium following myocardial infarction. Rats were subjected to left coronary artery ligation (MI; n = 11) or to sham operation (sham; n = 18). Two months later, hearts were excised, rinsed and buffer-perfused isovolumic...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.1996.0143
更新日期：1996-07-01 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：:It is still a matter of debate, whether decreased protein expression of SERCA 2a and phospholamban (PLB), or alterations in the phosphorylation state of PLB are responsible for the reduced SERCA 2a function in failing human myocardium. Thus, in membrane preparations from patients with terminal heart failure due to idi...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.1998.0897
更新日期：1999-03-01 00:00:00
abstract：:Hypertrophic cardiomyopathy occurs in two variants, either as an autosomal dominant familial disorder or as a sporadic disease without familial involvement. Different genes coding sarcomeric proteins of the heart have been identified as causing hypertrophic cardiomyopathy. Missense mutations in the cardiac beta-myosin...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.2000.1287
更新日期：2001-01-01 00:00:00
abstract：:In susceptible DBA/2 mice coxsackievirus B 3-induced myocarditis leads to inflammatory and necrotic lesions in the myocardium 7-10 days after virus inoculation. The purpose of this study was to determine whether hemodynamic changes occur in murine coxsackievirus B 3 myocarditis and whether they are correlated to histo...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/s0022-2828(95)90425-5
更新日期：1995-08-01 00:00:00
abstract：:Since systemic actions of thyroid hormone increase cardiac work, direct effects of T3 on myocardial protein turnover may be obscured in the intact animal. For this reason, the effects of T3 on synthesis and degradation of cellular protein were measured in replicate cultures of cardiac myocytes obtained from chick embr...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/s0022-2828(85)80103-6
更新日期：1985-09-01 00:00:00
abstract：:Lidocaine is a Na+ channel blocker that is highly effective for the treatment of ventricular tachyarrhythmias, but is largely ineffective against atrial arrhythmias. If is not known if this differential efficacy is the result of differences in lidocaine inhibition of atrial v ventricular Na+ channels. The purpose of t...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/0022-2828(95)90090-x
更新日期：1995-02-01 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：:Heart failure of diverse causes is associated with abnormalities of sarcoplasmic reticulum (SR) Ca(2+)transport. The purpose of this study was to determine whether the thyroid hormone analogue, 3,5-diiodothyropropionic acid (DITPA), prevents abnormal Ca(2+)transport and expression of SR proteins associated with post-i...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.2000.1225
更新日期：2000-11-01 00:00:00
abstract：AIMS:Ischaemic cardiovascular disease is a major cause of morbidity and mortality worldwide. Despite promising results from pre-clinical animal models, VEGF-based strategies for therapeutic angiogenesis have yet to achieve successful reperfusion of ischaemic tissues in patients. Failure to restore efficient VEGF activi...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2017.07.001
更新日期：2017-08-01 00:00:00
abstract：:The heart responds to increased haemodynamic load with growth of the ventricles. The rise in ventricle mass is due to increasing mass of the myocytes and proliferation of fibroblasts and smooth muscle cells. The accompanying adaptation and remodelling of the interstitium, e.g. production and composition of the extrace...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.1996.0280
更新日期：1997-01-01 00:00:00
abstract：:Patients with diabetes mellitus can develop cardiac dysfunction in the absence of underlying coronary artery disease or hypertension; a condition defined as diabetic cardiomyopathy. Mice lacking the intracellular protein kinase Akt2 develop a syndrome that is similar to diabetes mellitus type 2. Expression profiling o...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2010.08.011
更新日期：2010-12-01 00:00:00
abstract：:Cardiac troponin I (cTnI), the inhibitory-unit, and cardiac troponin T (cTnT), the tropomyosin-binding unit together with the Ca-binding unit (cTnC) of the hetero-trimeric troponin complex signal activation of the sarcomeres of the adult cardiac myocyte. The unique structure and heart myocyte restricted expression of ...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章,评审
doi：10.1016/j.yjmcc.2020.05.010
更新日期：2020-06-01 00:00:00
abstract：:We evaluated the time course of activation of endocardial endothelial cells and cardiomyocytes in adult rats with pressure overload induced by the abdominal aortic constriction. The silver staining technique for nucleolar organizer region was used to mark an increased transcriptional activity of the cells. An increase...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.1997.0484
更新日期：1997-09-01 00:00:00
abstract：:The 23Na NMR shift-reagent complexes (Dy(PPP)2, Dy(TTHA), and Tm(DOTP)) bind stoichiometric amounts of Ca2+. Thus, in perfused rat heart systems, a supplementation of Ca2+ is required to maintain the requisite extracellular free calcium concentration ([Ca(o)]f) and to approximate a physiological level of contractile f...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.2001.1459
更新日期：2001-11-01 00:00:00
abstract：:There is increasing evidence that pathological changes in the myocardium during chronic heart failure (CHF) are partly regulated through the activation of the renin-angiotensin system (RAS), an effect mediated by the angiotensin II type 1 receptor (AT1R). We examined the expression of cardiac AT1R mRNA in normal (atri...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.1997.0458
更新日期：1997-08-01 00:00:00
abstract：:In view of considerable gaps in our knowledge of myocardial peroxisomes. the aim of the present study is, on the basis of extensive electron-microscopic investigations, to provide reliable results on the inducibility of a proliferation (increase in the number) of these organelles in rodents' heart by several agents an...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.1996.0260
更新日期：1997-01-01 00:00:00
abstract：:We previously established a new measuring method of the myocardial O2 consumption of mechanically unloaded rat left-ventricular slices. O 2 consumption of unstimulated myocardium corresponds to basal metabolism. We have found O2 consumption of stimulated myocardium to include basal metabolism and O 2 consumption for C...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.1997.0630
更新日期：1998-03-01 00:00:00
abstract：:Diacylglycerol analogs and phorbol esters are used as protein kinase C (PKC) activators to investigate the effect of PKC on L-type calcium current [ICa(L)] in cardiomyocytes. 1-2-dioctanoyl-sn-glycerol (diC8) is a potent analog of diacylglycerol (DAG) which produces positive inotropic effects in guinea-pig atria cardi...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/0022-2828(95)90058-6
更新日期：1995-05-01 00:00:00
abstract：:To investigate the contribution of the cardiac renin-angiotensin system to ventricular dilatation after myocardial infarction, we examined the effects of 3-week treatments with an angiotensin converting enzyme inhibitor, delapril, and a selective angiotensin II type 1 (AT1) receptor antagonist, TCV-116, on haemodynami...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.1993.1149
更新日期：1993-11-01 00:00:00
abstract：:The metabolism of pantothenic acid (Pa) by cardiac muscle was studied in normal and diabetic rats. Tissue levels of Coenzyme A (CoA) are elevated in the heart during early (6 to 12 h) diabetes, remains at a high level for several days, and then returns to normal or below normal levels. The increase in total tissue CoA...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/0022-2828(89)90605-6
更新日期：1989-07-01 00:00:00
abstract：:The Na+/Ca2+ exchanger plays an important role in the maintenance of calcium homeostasis in the heart. Therefore, factors which regulate the exchanger have a significant impact on cardiac function. Previously, we showed that the non-hydrolysable GTP analog, 5'guanylyl imidodiphosphate [Gpp(NH)p], stimulates Na+/Ca2+ e...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.1996.0002
更新日期：1996-01-01 00:00:00
abstract：:Atrial fibrosis has been strongly associated with the presence of heart diseases/arrhythmias, including congestive heart failure (CHF) and atrial fibrillation (AF). Inducibility of AF as a result of atrial fibrosis has been the subject of intense recent investigation since it is the most commonly encountered arrhythmi...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章,评审
doi：10.1016/j.yjmcc.2009.09.001
更新日期：2010-03-01 00:00:00
abstract：:Adequate wound healing and scar formation is an essential response to myocardial infarction (MI), and fibroblasts are primary cellular components regulating the process. How fibroblast functions are altered post-MI and to what extent these abnormalities persist in vitro is not well understood. Accordingly, we isolated...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2005.07.008
更新日期：2005-10-01 00:00:00
abstract：:We report a novel action of intracellular adenosine monophosphate (AMP) to inhibit beta-adrenergic signaling in isolated rat ventricular myocytes. Extracellular application of adenosine or AMP suppressed isoproterenol (Iso)-induced prolongation of action potential duration (APD). This effect was completely abolished b...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2007.07.059
更新日期：2007-11-01 00:00:00
abstract：:Attenuation of excessive rates of myocardial glycolysis limits proton production and Ca(2+) overload during reperfusion and improves recovery of post-ischemic left ventricular (LV) function. In order to elucidate mechanisms underlying glycolytic inhibition by adenosine (ADO), this study tested the hypothesis that the ...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2012.03.014
更新日期：2012-06-01 00:00:00
