Hypoxia, calcium fluxes, and inotropic state: studies in cultured heart cells.

Hypoxia, calcium fluxes, and inotropic state: studies in cultured heart cells.
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缺氧、钙流动和正性肌力状态:培养心脏细胞的研究。

DOI:
10.1016/0002-8703(82)90478-1
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发表时间:
1982
影响因子:
4.8
通讯作者:
Lorell,B
Lorell,B
中科院分区:
医学2区
文献类型:
--
作者:
Smith,TW;Barry,WH;Marsh,JD;Lorell,B

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已经开发了使用培养的鸡胚心脏细胞研究各种生理和病理生理现象的细胞机制的方法。这些自发跳动的单层制剂缺乏明显的扩散障碍,和间隙空间成分可以方便地定义和控制。这些特性有助于测量跨膜通量和钠、钾和钙的细胞含量。同时,已经开发了测量收缩状态的方法,如培养物中单个肌细胞运动的幅度和速度所反映的。实验中所描述的培养的心脏细胞的收缩反应,以分级缺氧表现出一个关键的PO 2水平约12毫米汞柱,低于该水平发生的渐进性损害的收缩功能。在碘乙酸诱导的糖酵解阻断制剂中,对缺氧的敏感性增强。另外的实验进行了描述,证明了该模型系统的适用性,包括心脏糖苷诱导的增加的变力状态的机制和重要的兴奋-收缩耦合的钙流途径的定义的问题的研究。
Methods have been developed for the study of cellular mechanisms underlying a variety of physiologic and pathophysiologic phenomena using cultured chick embryo heart cells. These spontaneously beating monolayer preparations lack appreciable diffusion barriers, and interstitial space components can be defined and controlled conveniently. These properties facilitate the measurement of transmembrane fluxes and cellular contents of sodium, potassium, and calcium. Concomitantly, methods have been developed to measure the contractile state as reflected in the amplitude and velocity of movement of individual myocytes in the culture. Experiments are described in which the contractile responses of cultured heart cells to graded hypoxia demonstrated a critical PO2level around 12 mm Hg, below which progressive impairment of contractile function occurred. In preparations with iodoacetate-induced glycolytic blockade, enhanced sensitivity to hypoxia occurred. Additional experiments are described, demonstrating the applicability of this model system to the study of problems including the mechanism of cardiac glycoside-induced increases in inotropic state and the definition of calcium flux pathways important in excitation-contraction coupling.
氨力农(一种强心药)对狗红细胞钙运动的影响。
DOI: 10.1172/jci109851
发表时间: 1980
期刊: The Journal of clinical investigation
影响因子: --
作者:
J. Parker;J. Harper
通讯作者: J. Harper
DOI: 10.1073/pnas.75.12.5831
发表时间: 1978-01-01
影响因子: 11.1
作者:
GALPER, JB;SMITH, TW
通讯作者: SMITH, TW
分级缺氧对培养鸡胚心室细胞收缩的影响。
DOI: 10.1152/ajpheart.1980.239.5.h651
发表时间: 1980
期刊: The American journal of physiology
影响因子: --
作者:
Barry,WH;Pober,J;Marsh,JD;Frankel,SR;Smith,TW
通讯作者: Smith,TW
培养心脏细胞中毒蕈碱胆碱能受体的激动剂和鸟嘌呤核苷酸调节。
DOI: --
发表时间: 1980
期刊: The Journal of biological chemistry
影响因子: --
作者:
Galper,JB;Smith,TW
通讯作者: Smith,TW
DOI: 10.1161/01.res.42.6.856
发表时间: 1978-01-01
影响因子: 20.1
作者:
HOUGEN, TJ;SMITH, TW
通讯作者: SMITH, TW