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豚鼠离体输精管中三磷酸腺苷与去甲肾上腺素之间的相互作用。

Interaction between adenosine triphosphate and noradrenaline in the isolated vas deferens of the guinea-pig.

作者信息

Kazić T, Milosavljević D

出版信息

Br J Pharmacol. 1980;71(1):93-8. doi: 10.1111/j.1476-5381.1980.tb10913.x.

Abstract

1 An interaction between adenosine triphosphate (ATP) and noradrenaline (NA) was investigated in the isolated vas deferens of the guinea-pig. 2 ATP (1.7 to 50 microM) enhanced contractions due to transmural electrical stimulation (ES; parameters: 30 Hz, 0.2 to 0.3 ms, 10 to 30 V; 1 s train duration). Responses to exogenous NA (12 microM) were also potentiated by ATP while contractions to acetylcholine (6 microM) were inhibited. 3 NA (1.2 microM) potentiated ATP-induced contractions and prevented the development of tachyphylaxis to ATP (510 microM). 4 Phentolamine (12.5 microM) prevented the potentiation by NA of ATP-induced contractions; these contractions were insensitive to phentolamine (up to 25 microM). 5 Removal of potassium chloride from the Tyrode solution for 10 min abolished the potentiating actions of both ATP and NA. 6 The present results suggest that the effect of ATP may be functionally closely related to that of NA at alpha-adrenoceptors in the vas deferens of the guinea-pig.

摘要

1 在豚鼠离体输精管中研究了三磷酸腺苷(ATP)与去甲肾上腺素(NA)之间的相互作用。2 ATP(1.7至50微摩尔)增强了经壁电刺激(ES;参数:30赫兹,0.2至0.3毫秒,10至30伏;1秒串刺激持续时间)引起的收缩。ATP还增强了对外源性NA(12微摩尔)的反应,而对乙酰胆碱(6微摩尔)的收缩则受到抑制。3 NA(1.2微摩尔)增强了ATP诱导的收缩,并防止了对ATP(5至10微摩尔)快速耐受性的发展。4 酚妥拉明(12.5微摩尔)阻止了NA对ATP诱导收缩的增强作用;这些收缩对酚妥拉明(高达25微摩尔)不敏感。5 从台氏液中去除氯化钾10分钟会消除ATP和NA的增强作用。6 目前的结果表明,在豚鼠输精管中,ATP的作用可能在功能上与NA在α-肾上腺素能受体上的作用密切相关。

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