Abstract：
:Our previous work showed that myosin phosphorylation decreased the ATPase activity of skeletal muscle myofibrils that were lightly fixed with glutaraldehyde. The fixation process prevented sarcomere shortening and destruction of the ordered filament array upon the addition of ATP. We have now extended these results to myofibrils prepared from hearts of rabbits, dogs and rats. Myofibrils were phosphorylated by incubation with myosin light chain kinase, calmodulin and either ATP-gamma s or ATP, for 15 minutes at 25 degrees C. The extent of myosin light chain phosphorylation was 50% to 80%. The ATPase activity of unphosphorylated myofibrils was not altered by reaction with 0.01% glutaraldehyde for 5 minutes at 0 degrees C, and the ATPase activity of unfixed myofibrils was not changed by phosphorylation. However, phosphorylation decreased the ATPase activity of fixed myofibrils by 50%. The effect on myocardial myofibrillar ATPase activity of phosphorylation was similar in the three animal species. These results suggest that in both skeletal and cardiac muscle, myosin phosphorylation decreases the rate of cross-bridge cycling resulting in decreased energy expenditure. It also appears that the effect of myosin light chain phosphorylation on ATPase activity requires an ordered myofilament structure.
journal_name
J Mol Cell Cardioljournal_title
Journal of molecular and cellular cardiologyauthors
Franks K,Cooke R,Stull JTdoi
10.1016/s0022-2828(84)80624-0subject
Has Abstractpub_date
1984-07-01 00:00:00pages
597-604issue
7eissn
0022-2828issn
1095-8584pii
S0022-2828(84)80624-0journal_volume
16pub_type
杂志文章abstract：:Peroxynitrite is a potent oxidant and nitrating species proposed as a direct effector of myocardial damage in a wide range of cardiac diseases. Whether peroxynitrite also acts indirectly, by modulating cell signal transduction pathways in the myocardium, has not been investigated. Here, we examined the ability of pero...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2005.02.020
更新日期：2005-05-01 00:00:00
abstract：:Heart failure is the leading cause of death among diabetic people. Cellular and molecular entities leading to diabetic cardiomyopathy are, however, poorly understood. Coupling of cardiac carbonic anhydrase II (CAII) and Na+/H+ exchanger 1 (NHE1) to form a transport metabolon was analyzed in obese type 2 diabetic mice ...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2019.09.005
更新日期：2019-11-01 00:00:00
abstract：:Cardiac-specific transgenesis in the mouse is widely used to study the basic biology and chemistry of the heart and to model human cardiovascular disease. A fundamental difference between mouse and human hearts is the background motor protein: mouse hearts contain predominantly the alphaalpha-myosin heavy chain (MyHC)...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2006.08.116
更新日期：2007-01-01 00:00:00
abstract：:Myocardial perfusion measurement with colored microspheres may become an alternative for radioactive microsphere techniques. We use and validate a spectrophotometric method that has been previously established for large animals in the isolated perfused rat heart. The perfusion system was adapted for use in a NMR micro...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.1996.0053
更新日期：1996-03-01 00:00:00
abstract：:The aim was to determine whether adaptation to chronic hypoxia protects the heart against ischemic arrhythmias and whether ATP-dependent potassium channels (K(ATP)) play a role in the antiarrhythmic mechanism. Adult male rats were adapted to intermittent high altitude hypoxia (5000 m, 4 h/day) and susceptibility to is...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.1999.1013
更新日期：1999-10-01 00:00:00
abstract：:The possibility to induce pluripotency in somatic cells or, even further, to induce cell transdifferentiation through the forced expression of reprogramming factors has offered new, attractive options for cardiovascular regenerative medicine. In fact, recent discoveries have demonstrated that induced pluripotent stem ...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章,评审
doi：10.1016/j.yjmcc.2013.04.022
更新日期：2013-09-01 00:00:00
abstract：:The authors have shown that stimulation of cardiac alpha 1-adrenoceptors confers immediate cardioprotection in the isolated rat heart against post-ischemic dysfunction, and have recently demonstrated that in vivo treatment of rats with norepinephrine (NE) induces cardiac heat shock protein 72 and myocardial adaptation...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.1996.0194
更新日期：1996-09-01 00:00:00
abstract：:Carnitine, certain of its derivatives, and the amino acid metabolite, taurine, when administered independently in prior studies have been shown to improve cardiac mechanic and/or metabolism. The purpose of these studies is to test a new compound, propionylcarnitine taurine (PCT), which potentially combines these actio...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/s0022-2828(88)80179-2
更新日期：1988-01-01 00:00:00
abstract：:Fibroblast growth factor receptor (FGFR) is expressed in a variety of cells and is involved in their proliferation/migration/survival. To elucidate FGFR-mediated specific action of vascular endothelial cells (ECs) on myocardial ischemia, we generated endothelium-targeted transgenic mice overexpressing constitutively a...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2009.01.015
更新日期：2009-05-01 00:00:00
abstract：:We have identified in soluble extracts of rat heart, a 500 000 dalton sulfhydryl-dependent protease which degrades globin and casein to acid-soluble peptides at an alkaline pH optimum. This enzyme was purified more than 1700-fold with respect to the postmicrosomal supernatant. On the basis of various catalytic and bio...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/0022-2828(83)90304-8
更新日期：1983-01-01 00:00:00
abstract：:In the postnatal rat heart, muscle cells continue to divide as well as increase in size. At the same time the cells in the soleus muscle (a slow skeletal muscle) do not divide, although they continue to grow in size. Since microtubules may have a role in orienting intracellular structures in muscle, we determined the ...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/s0022-2828(85)80087-0
更新日期：1985-01-01 00:00:00
abstract：:In the past decade, genetic modification has been extensively employed to define (patho)physiological roles of chaperones and the cytoskeleton in the heart, promoting dramatic advances in this field. Both loss-of-function and gain-of-function approaches have been used productively. alphaB-Crystallin (CryAB) is the mos...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章,评审
doi：10.1016/j.yjmcc.2004.07.004
更新日期：2004-12-01 00:00:00
abstract：:The failure of adenosine receptor antagonists to consistently attenuate metabolic coronary vasodilation suggests that adenosine is not a primary regulator of functional hyperemia. An alternative hypothesis, however, is that metabolic stimulation of the heart in the presence of an adenosine receptor antagonist results ...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/0022-2828(91)90132-6
更新日期：1991-08-01 00:00:00
abstract：:It is increasingly evident that redox-dependent modifications in cellular proteins and signaling pathways (or redox signaling) play important roles in many aspects of cardiac hypertrophy. Indeed, these redox modifications may be intricately linked with the process of hypertrophy wherein there is not only a significant...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章,评审
doi：10.1016/j.yjmcc.2014.02.002
更新日期：2014-08-01 00:00:00
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 sever...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.1994.1084
更新日期：1994-06-01 00:00:00
abstract：:Experimental evidence has emerged that myocardial ischemic preconditioning can prime the mitochondria into a "stress-resistant state", so that cell death is reduced following prolonged severe ischemia and reperfusion. Using a swine model of chronically ischemic myocardium, we tested the hypothesis that mitochondria wi...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2006.07.008
更新日期：2006-12-01 00:00:00
abstract：:Cardiac alpha(1)-adrenoceptors (AR) have two predominant subtypes (alpha(1A)-AR and alpha(1B)-AR) however, their roles in regulating contraction are unclear. We determined the effects of stimulating alpha(1A)-AR (using the subtype-selective agonist A61603) and alpha(1B)-AR (using a gene knockout mouse lacking alpha(1A...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.2002.2049
更新日期：2002-08-01 00:00:00
abstract：:Increasing heart rate enhances cardiac contractility (force frequency relationship, FFR) and accelerates cardiac relaxation (frequency-dependent acceleration of relaxation, FDAR). The positive FFR together with FDAR promotes rapid filling and ejection of blood from the left ventricle (LV) at higher heart rates. Recent...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2012.06.019
更新日期：2012-09-01 00:00:00
abstract：:The importance of endogenous and exogenous estrogen levels to the development of cardiovascular disease in women in controversial. The purpose of our study was to examine the effect of estrogen on the development of hypertension, cardiac hypertrophy, ventricular function, and gene expression for atrial natriuretic pep...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.1999.0985
更新日期：1999-08-01 00:00:00
abstract：:The pyrimidine base, orotic acid (OA), improves the function of recently infarcted hearts subjected to global ischemia but its mechanism of action is unclear. Our aims were to examine (i) in normal rats, the effect of OA on pyrimidine levels in plasma, liver and heart; (ii) in rats with normal or infarcted hearts, the...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.1997.0550
更新日期：1997-12-01 00:00:00
abstract：:Atrial fibrillation (AF) is commonly associated with chronic dilatation of the left atrium, both in human disease and animal models. The immediate signaling enzyme phospholipase C (PLC) is activated by mechanical stretch to generate the Ca2+-releasing messenger inositol(1,4,5)trisphosphate (Ins(1,4,5)P3) and sn-1,2-di...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2009.08.020
更新日期：2009-11-01 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：:In addition to the well-known reduction in the maximal rate of rise the antiarrhythmic agent, lidocaine, also produces a shortening in the duration of the normal ventricular action potential. The voltage-dependent currents carried by Na, Ca and K ions were examined in the absence and presence of lidocaine, in order to...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/s0022-2828(88)80117-2
更新日期：1988-07-01 00:00:00
abstract：:Biglycan, a small dermatan sulphate proteoglycan, has been postulated to interact with other components of the extracellular matrix (ECM), specifically collagens. We hypothesized that biglycan messenger ribonucleic acid (mRNA) is increased in the myocardial infarct zone. Biglycan mRNA expression after acute myocardial...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.1998.0737
更新日期：1998-09-01 00:00:00
abstract：:Cell therapy has the potential to drastically improve clinical outcomes for the 1.45 million patients suffering from a myocardial infarction (MI) each year in the U.S. However, the limitations associated with this treatment - including poor engraftment, significant cell death and poor differentiation potential - have ...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2015.09.007
更新日期：2015-11-01 00:00:00
abstract：:Transgenic mice with cardiac-specific overexpression of G alpha q exhibit a biochemical and physiological phenotype of load-independent cardiac hypertrophy with contractile dysfunction. To elucidate the cellular basis for altered contractility, we measured cellular contraction, Ca(2+)transients, and l -type Ca(2+)chan...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.1999.0966
更新日期：1999-07-01 00:00:00
abstract：:The lack of pathological consequences of cardiac ATP-sensitive potassium channel (K(ATP)) channel gene manipulation is in stark contrast to the effect of similar perturbations in the pancreatic beta-cell. Because the pancreatic and cardiac channel share the same pore-forming subunit (Kir6.2), the different effects of ...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1016/j.yjmcc.2005.06.003
更新日期：2005-10-01 00:00:00
abstract：:beta(1)integrin-deficient (beta(1)-/-) ES cells showed increased differentiation of cardiac cells characterized by reduced adhesion and high beating frequency. Whereas in whole embryoid body outgrowths of beta(1)-/- cells maximum levels of alpha(v), beta(3)and beta(5)integrin mRNA were delayed and transiently upregula...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.2000.1326
更新日期：2001-03-01 00:00:00
abstract：:Disturbances of cellular calcium homeostasis due to oxidative stress are involved in reperfusion associated phenomena like myocardial stunning and reperfusion induced arrhythmias. This study investigates the effect of the major neutrophil-derived oxidant hypochlorous acid (HOCl) on the l-type calcium current (ICa,L) o...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章
doi：10.1006/jmcc.1998.0749
更新日期：1998-09-01 00:00:00
abstract：:The BH3-only proteins, including BNip3, are members of the Bcl-2 family of cell death-regulating factors. Whereas proteins such as Bax and Bak play a central role in most forms of apoptosis, the BH3-only proteins appear to modulate apoptosis through cell type- and signal-specific pathways. This review will focus on ou...
journal_title：Journal of molecular and cellular cardiology
pub_type： 杂志文章,评审
doi：10.1016/j.yjmcc.2004.11.007
更新日期：2005-01-01 00:00:00
