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U-50,488H与去甲肾上腺素能系统对离体右心房的相互作用。

Interaction of U-50,488H and noradrenergic systems on isolated right atria.

作者信息

Micol J A, Laorden M L

机构信息

Department of Physiology and Pharmacology, CSV Arrixaca Hospital, Murcia, Spain.

出版信息

Gen Pharmacol. 1994 Mar;25(2):275-7. doi: 10.1016/0306-3623(94)90054-x.

DOI:10.1016/0306-3623(94)90054-x
PMID:8026726
Abstract
  1. The present study examined the effect of U-50,488H on auricular rate on isolated right atria of the rat. 2. The negative chronotropic action induced by the kappa-agonist (U-50,488H) was potentiated by propranolol (10(-8) or 5 x 10(-8) M) or yohimbine (5 x 10(-7) or 10(-6) M) and in reserpinized rats (5 mg/kg i.p. 24 h before the experiments). 3. These results suggest that catecholaminergic mechanisms are involved in the cardiac depressant effect induced by U-50,488H.
摘要
  1. 本研究检测了U - 50,488H对大鼠离体右心房心率的影响。2. κ受体激动剂(U - 50,488H)诱导的负性变时作用在普萘洛尔(10⁻⁸或5×10⁻⁸ M)或育亨宾(5×10⁻⁷或10⁻⁶ M)作用下以及在利血平化大鼠(实验前24小时腹腔注射5 mg/kg)中增强。3. 这些结果表明,儿茶酚胺能机制参与了U - 50,488H诱导的心脏抑制作用。

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