α‐ADRENOCEPTORS CAN MEDIATE CHRONOTROPIC RESPONSES IN THE RAT HEART

α‐ADRENOCEPTORS CAN MEDIATE CHRONOTROPIC RESPONSES IN THE RAT HEART
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α-肾上腺素能受体可以介导大鼠心脏的变时反应

DOI:
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发表时间:
1981
影响因子:
7.3
通讯作者:
J. McGrath
J. McGrath
中科院分区:
医学2区
文献类型:
--
作者:
N. Flavahan;J. McGrath

文献摘要

被引文献

相似文献

在去髓大鼠中,阿米替林(一种"选择性" α 1-肾上腺素受体激动剂)引起正性变时性反应。这种反应可以被哌唑嗪拮抗,但不能被普萘洛尔或萝芙木素拮抗。类似地,对心脏加速器神经刺激的部分变时性反应对普萘洛尔的阻断具有抗性,但对哌唑嗪或WB 4101敏感。我们的结论是,α 1-肾上腺素受体可以介导大鼠心脏的变时性反应,无论是外源性激动剂或内源性神经递质去甲肾上腺素。
In the pithed rat, amidephrine, a ‘selective’ α1‐adrenoceptor agonist, evokes a positive chronotropic response. This response can be antagonized by prazosin but not by propranolol or by rauwolscine. Similarly, part of the chronotropic response to cardioaccelerator nerve stimulation is resistant to blockade by propranolol but is sensitive to prazosin or WB4101. We conclude that α1‐adrenoceptors can mediate a chronotropic response in the rat heart either to exogenous agonists or to the endogenous neurotransmitter noradrenaline.