The responses of the hepatic and splanchnic vascular beds to vasopressin in rats.
The responses of the hepatic and splanchnic vascular beds to vasopressin in rats.
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大鼠肝脏和内脏血管床对加压素的反应。
DOI:
10.2220/biomedres.33.83
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
Y. Kurata
中科院分区:
文献类型:
--
作者:
Wei Zhang;T. Shibamoto;Y. Kuda;Shohei Shinomiya;Y. Kurata
Vasopressin, a vasoactive peptide, causes vasoconstriction via V1a vasopressin receptors. Unlike other vasoconstrictor agents, vasopressin also has vasodilatory properties. The purpose of this study was to determine the effect of vasopressin on hepatic and splanchnic circulation in Sprague- Dawley rats. The experiments were conducted in not only isolated blood- and constant flowperfused livers but also anesthetized spontaneously breathing rats. In anesthetized rats, portal venous pressure (Ppv), systemic arterial pressure (Psa), central venous pressure, and hepatic blood flow (HBF) of combined portal venous and hepatic arterial blood flow were continuously measured, and splanchnic vascular bed resistance (Rspl) defined by (Psa - Ppv) / HBF was determined. In perfused livers, vasopressin at 0.1-1,000 nM caused weak venoconstriction as evidenced by small increase in Ppv. In anesthetized rats, when vasopressin was injected into the portal vein as a bolus consecutively at 0.01-100 nmol/kg, Psa increased dose-dependently with the peak increment of 60 ± 18 mmHg at 100 nmol/kg. Ppv and HBF decreased, with resultant increase in Rspl, indicating splanchnic vasoconstriction. In conclusion, hepatic venoconstrictor action of vasopressin was weak in rats. Vasopressin causes splanchnic vasoconstriction, resulting in a decrease in HBF and Ppv in anesthetized rats.
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DOI:
10.1152/ajpheart.1991.261.5.h1494
发表时间:
1991
期刊:
The American journal of physiology
影响因子:
--
作者:
Welt,FG;Rutlen,DL
通讯作者:
Rutlen,DL
DOI:
10.1152/ajpheart.2000.279.3.h1147
发表时间:
2000
期刊:
American journal of physiology. Heart and circulatory physiology
影响因子:
--
作者:
Rothe,CF;Maass-Moreno,R
通讯作者:
Maass-Moreno,R
DOI:
10.1152/ajpheart.1989.257.2.h415
发表时间:
1989
期刊:
The American journal of physiology
影响因子:
--
作者:
Walker,BR;HaynesJr,J;Wang,HL;Voelkel,NF
通讯作者:
Voelkel,NF
影响因子:
1.7
作者:
Rudichenko,VM;Beierwaltes,WH
通讯作者:
Beierwaltes,WH