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大鼠心室纤维中的膜电流与收缩激活

Membrane currents and activation of contraction in rat ventricular fibres.

作者信息

Léoty C

出版信息

J Physiol. 1974 Jun;239(2):237-49. doi: 10.1113/jphysiol.1974.sp010566.

DOI:10.1113/jphysiol.1974.sp010566
PMID:4414634
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC1330921/
Abstract
  1. A double sucrose gap technique has been combined with an optical method of measuring the movement of the preparation and applied to rat ventricular trabeculae.2. Experiments performed in normal McEwen and in depleted sodium solutions with and without tetrodotoxin, manganese or predepolarization suggest that the fast inward current is not as important as the slow inward current in determining the contractile strength. Furthermore, there is a marked similarity between potential dependence of the slow inward current and the contraction, particularly in sodium-depleted fluids.3. The appearance of a staircase response associated with a series of depolarizations, in normal McEwen, may mean that there is an intervention of a further, possibly intracellular, stage between inward current and contraction, as suggested by earlier experiments on frog as well as on mammalian heart.
摘要
  1. 双蔗糖间隙技术已与一种测量标本运动的光学方法相结合,并应用于大鼠心室小梁。

  2. 在正常的麦克尤恩溶液以及含有和不含有河豚毒素、锰或预去极化的低钠溶液中进行的实验表明,在决定收缩强度方面,快速内向电流不如缓慢内向电流重要。此外,缓慢内向电流的电位依赖性与收缩之间存在明显的相似性,特别是在低钠溶液中。

  3. 在正常的麦克尤恩溶液中,与一系列去极化相关的阶梯反应的出现,可能意味着如早期对青蛙和哺乳动物心脏的实验所表明的那样,在内向电流和收缩之间存在另一个可能是细胞内的阶段的干预。

相似文献

1
Membrane currents and activation of contraction in rat ventricular fibres.大鼠心室纤维中的膜电流与收缩激活
J Physiol. 1974 Jun;239(2):237-49. doi: 10.1113/jphysiol.1974.sp010566.
2
Two inward currents in frog atrial muscle.青蛙心房肌中的两种内向电流。
J Gen Physiol. 1971 Nov;58(5):523-43. doi: 10.1085/jgp.58.5.523.
3
Some limitations of the double sucrose gap, and its use in a study of the slow outward current in mammalian ventricular muscle.双蔗糖间隙的一些局限性及其在哺乳动物心室肌缓慢外向电流研究中的应用。
J Physiol. 1974 Aug;240(3):775-806. doi: 10.1113/jphysiol.1974.sp010634.
4
Positive and negative inotropic action of polarizing current on the frog ventricle.极化电流对蛙心室的正性和负性变力作用。
Am J Physiol. 1970 Apr;218(4):1038-45. doi: 10.1152/ajplegacy.1970.218.4.1038.
5
Electrical characteristics of frog atrial trabeculae in the double sucrose gap.双蔗糖间隙法中蛙心房小梁的电特性
Biophys J. 1975 Oct;15(10):1047-67. doi: 10.1016/S0006-3495(75)85882-6.
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Voltage-clamp experiments on frog single skeletal muscle fibres: evidence for a tubular sodium current.青蛙单根骨骼肌纤维的电压钳实验:管状钠电流的证据
J Physiol. 1977 Aug;269(3):605-25. doi: 10.1113/jphysiol.1977.sp011918.
7
Existence and role of a slow inward current during the frog atrial action potential.蛙心房动作电位期间缓慢内向电流的存在及其作用
Pflugers Arch. 1969;308(2):91-110. doi: 10.1007/BF00587018.
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Voltage-dependent potentiation of the slow inward current in frog atrium.青蛙心房中慢内向电流的电压依赖性增强。
J Physiol. 1981 Jan;310:77-95. doi: 10.1113/jphysiol.1981.sp013538.
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Inward calcium current in twitch muscle fibres of the frog.青蛙抽搐肌纤维中的内向钙电流。
J Physiol. 1978 Oct;283:197-209. doi: 10.1113/jphysiol.1978.sp012496.
10
Slow recovery from inactivation of inward currents in mammalian myocardial fibres.哺乳动物心肌纤维内向电流失活后的缓慢恢复。
J Physiol. 1974 Aug;240(3):703-24. doi: 10.1113/jphysiol.1974.sp010630.

引用本文的文献

1
Sex differences in myocardial contractility in the rat.大鼠心肌收缩力的性别差异。
Basic Res Cardiol. 1983 Mar-Apr;78(2):156-71. doi: 10.1007/BF01906669.
2
Age-related differences in excitation-contraction coupling in rat papillary muscle.大鼠乳头肌兴奋-收缩偶联中的年龄相关差异。
Basic Res Cardiol. 1983 Sep-Oct;78(5):492-504. doi: 10.1007/BF01906460.
3
The contractile behaviour of EGTA- and detergent-treated heart muscle.经乙二醇双乙醚二胺四乙酸(EGTA)和去污剂处理的心肌的收缩行为。
J Muscle Res Cell Motil. 1985 Oct;6(5):541-67. doi: 10.1007/BF00711914.
4
Electrical activity and contraction in cells isolated from rat and guinea-pig ventricular muscle: a comparative study.大鼠和豚鼠心室肌分离细胞的电活动与收缩:一项比较研究。
J Physiol. 1987 Oct;391:527-44. doi: 10.1113/jphysiol.1987.sp016754.
5
Interval dependence of force and twitch duration in rat heart explained by Ca2+ pump inactivation in sarcoplasmic reticulum.肌浆网中Ca2+泵失活解释大鼠心脏中力与抽搐持续时间的间期依赖性
J Physiol. 1990 Dec;431:427-44. doi: 10.1113/jphysiol.1990.sp018338.

本文引用的文献

1
The potassium chloride contracture of the heart and its modification by calcium.心脏的氯化钾挛缩及其钙的影响
J Physiol. 1956 Dec 28;134(3):584-99. doi: 10.1113/jphysiol.1956.sp005667.
2
Ionic currents in rat ventricular heart fibres: voltage-clamp experiments using double sucrose-gap technique.
J Physiol. 1969 Oct;204(2):95P-96P.
3
Two components of inward current in myocardial muscle fibers.心肌纤维内向电流的两个组成部分。
Pflugers Arch. 1969;307(3):190-203. doi: 10.1007/BF00592084.
4
Calcium current and activation of contraction in ventricular myocardial fibers.心室肌纤维中的钙电流与收缩激活
Science. 1969 Jan 24;163(3865):399-401. doi: 10.1126/science.163.3865.399.
5
The ultrastructure of frog ventricular cardiac muscle and its relationship to mechanism of excitation-contraction coupling.青蛙心室心肌的超微结构及其与兴奋-收缩偶联机制的关系。
J Cell Biol. 1968 Jul;38(1):99-114. doi: 10.1083/jcb.38.1.99.
6
The dependence of the contractile force generated by frog auricular trabeculae upon the external calcium concentration.青蛙心耳小梁产生的收缩力对外界钙浓度的依赖性。
J Physiol. 1971 May;215(1):139-62. doi: 10.1113/jphysiol.1971.sp009462.
7
The action of caffeine on frog myocardial contractility.咖啡因对青蛙心肌收缩性的作用。
J Physiol. 1971;217 Suppl:64P-66P.
8
Voltage dependence and time dependence of contraction in sheep cardiac Purkinje fibers.绵羊心脏浦肯野纤维收缩的电压依赖性和时间依赖性。
Circ Res. 1971 Apr;28(4):446-60. doi: 10.1161/01.res.28.4.446.
9
The relation between membrane potential, membrane currents and activation of contraction in ventricular myocardial fibres.心室肌纤维的膜电位、膜电流与收缩激活之间的关系。
J Physiol. 1970 Mar;207(1):211-29. doi: 10.1113/jphysiol.1970.sp009057.
10
Voltage clamp experiments on ventricular myocarial fibres.心室肌纤维的电压钳实验。
J Physiol. 1970 Mar;207(1):165-90. doi: 10.1113/jphysiol.1970.sp009055.