Calcium mechanism of norepinephrine activation of ionic pump in somatic cells of Lumbricus terrestris earthworm muscle wall

被引：2

作者：

Volkov, EM ^{[1
]}

Nurullin, LF ^{[1
]}

Obukhova, AS ^{[1
]}

Chikin, AV ^{[1
]}

Nikol'skii, EE ^{[1
]}

机构：

[1] Kazan State Med Univ, Kazan, Russia

来源：

BULLETIN OF EXPERIMENTAL BIOLOGY AND MEDICINE | 2002年 / 134卷 / 01期

关键词：

norepinephrine; muscle cells; earthworm;

D O I：

10.1023/A:1020688117507

中图分类号：

R-3 [医学研究方法]; R3 [基础医学];

学科分类号：

1001 ;

摘要：

Blockade of norepinephrine-induced hyperpolarization in earthworm muscle cells was observed in a calcium-free medium, after substitution of Ca2+ with Mn2+, and in the presence of verapamil or chlorpromazine to the incubation saline. Changes in Ca2+ concentration in the saline and addition of caffeine had no effect on the resting potential of muscle cells. It was hypothesized that signal transduction from norepinephrine-activated membrane adrenoceptors to the ionic pump in earthworm muscle cells depends on influx of extracellular Ca2+ and subsequent involvement of Ca2+-accepting proteins similar to calmodulin in vertebrates.

引用

页码：18 / 19

页数：2

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