Ethanol inhibition of stress-related tachycardia involves medullary NMDA receptors.

Ethanol inhibition of stress-related tachycardia involves medullary NMDA receptors.
复制标题

乙醇对应激相关心动过速的抑制作用涉及髓质 NMDA 受体。

DOI:
10.1016/0014-2999(96)00305-6
复制
发表时间:
1996
影响因子:
5
通讯作者:
Kunos,G
Kunos,G
中科院分区:
医学2区
文献类型:
--
作者:
Varga,K;Lovas,G;Palkovits,M;Kunos,G

文献摘要

参考文献

被引文献

相似文献

大鼠下丘脑穹窿周围区的神经元向孤束核连合部发出下行投射,这一结果由顺行示踪研究证实。在麻醉大鼠中,通过微量注射荷包牡丹碱或6-OH-萨氯芬刺激穹窿周围区的神经元引起心动过速并抑制压力反射性心动过缓。从穹窿周围区引起的效应在大小上与从相邻的背内侧核(也称为下丘脑防御区)引起的效应相似。孤束核内微量注射NMDA(N-甲基-D-天冬氨酸)受体拮抗剂AP-7(2-氨基-7-膦酰基庚酸)可抑制刺激穹窿周围区引起的心动过速反应。静脉注射乙醇或注射到孤束核中也抑制这种心动过速反应,但与AP-7结合时不会引起进一步的抑制。我们的结论是,穹窿周围区是下丘脑防御区的一部分,它是由GABA A和GABA B受体介导的强,紧张性GABA能抑制。此外,从穹窿周围区到孤束核的下行输入是通过NMDA突触,乙醇通过抑制孤束核中的这些NMDA受体来抑制应激相关的心动过速。
In rats, neurons in the perifornical area of the hypothalamus send descending projections to the commissural part of the nucleus tractus solitarii as demonstrated by an anterograde tracer study. In urethane-anaesthetised rats, stimulation of neurons in the perifornical area by microinjection of bicuculline or 6-OH-saclofen causes tachycardia and inhibits baroreflex bradycardia. The effects elicited from the perifornical area are similar in magnitude to those elicited from the adjacent dorsomedial nucleus, also called the hypothalamic defense area. Microinjection into the nucleus tractus solitarii of the NMDA (N-methyl-d-aspartate) receptor antagonist, AP-7 (2-amino-7-phosphonoheptanoic acid), inhibits the tachycardic response to stimulation of the perifornical area. Injection of ethanol intravenously or into the nucleus tractus solitarii also inhibits this tachycardic response, but causes no further inhibition when combined with AP-7. We conclude that the perifornical area is part of the hypothalamic defense area, and it is under strong, tonic GABAergic inhibition mediated by both GABAAand GABABreceptors. Furthermore, descending input from the perifornical area to the nucleus tractus solitarii is via an NMDA synapse, and ethanol inhibits stress-related tachycardia by inhibiting these NMDA receptors in the nucleus tractus solitarii.
孤束核中 NMDA 和非 NMDA 受体在乙醇对压力反射的抑制作用中的作用。
DOI: --
发表时间: 1993
期刊: The Journal of pharmacology and experimental therapeutics
影响因子: --
作者:
el-Mas,MM;Abdel-Rahman,AA
通讯作者: Abdel-Rahman,AA
酒精和压力在心血管水平上的相互作用。
DOI: --
发表时间: 1990
期刊: Alcohol
影响因子: 2.3
作者:
L. Pohorecky
通讯作者: L. Pohorecky
DOI: --
发表时间: 1986
影响因子: 3.8
作者:
G. T. Horst;P. Luiten
通讯作者: P. Luiten
NMDA 受体的激活对于脑干迷走神经运动神经元的快速信息传递是必要的。
DOI: --
发表时间: 1991
期刊: Brain Research
影响因子: 2.9
作者:
Y. T. Wang;D. Bieger;R. S. Neuman
通讯作者: R. S. Neuman
DOI: --
发表时间: 1992
期刊: The Journal of comparative neurology
影响因子: --
作者:
G. Allen;D. Cechetto
通讯作者: D. Cechetto