Active and passive liver microvascular responses from angiotensin, endothelin, norepinephrine, and vasopressin.
Active and passive liver microvascular responses from angiotensin, endothelin, norepinephrine, and vasopressin.
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血管紧张素、内皮素、去甲肾上腺素和加压素的主动和被动肝脏微血管反应。
DOI:
10.1152/ajpheart.2000.279.3.h1147
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发表时间:
2000
期刊:
影响因子:
--
通讯作者:
Maass-Moreno,R
中科院分区:
文献类型:
--
作者:
Rothe,CF;Maass-Moreno,R
Vasoconstrictor agents may induce a decrease in hepatic vascular volume passively, by decreasing distending pressure, or actively, by stimulating contractile elements of capacitance vessels. Hepatic venular resistance was estimated in anesthetized rabbits from hepatic venular pressure (Pμhv; by servo-null micropipette), inferior vena cava pressure, and total hepatic blood flow (Fhv; by ultrasound flow probe). Changes in liver volume were estimated from measures of liver lobe thickness. Angiotensin (ANG) II, endothelin (ET)-1, norepinephrine (NE), and vasopressin (VP) were infused into the portal vein at a constant rate for 5 min. We conclude that ANG II and NE induced active constriction of hepatic capacitance vessels, because the liver lobe thickness decreased significantly even though Pμhvand portal venous distending pressure (Ppv) increased. All four agents increased splanchnic and hepatic venous resistances in similar proportions. With VP, Pμhvand Ppvdecreased, but with ET-1, Pμhvand Ppvincreased. However, lobe thickness was not significantly changed by either drug during the infusion compared with the 2-min control period. Thus VP and ET-1 have only minor effects on hepatic capacitance vessels. ET-1, at 0.04 μg · min−1· kg body wt−1, caused an increase in systemic arterial blood pressure, but erythrocyte movement through the sinusoids in some animals stopped.
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影响因子:
20.1
作者:
A. Shoukas;K. Sagawa
通讯作者:
K. Sagawa
DOI:
--
发表时间:
1993
期刊:
影响因子:
--
作者:
J. Vane
通讯作者:
J. Vane
DOI:
10.1152/ajpgi.1995.269.2.g269
发表时间:
1995
期刊:
The American journal of physiology
影响因子:
--
作者:
Zhang,JX;Bauer,M;Clemens,MG
通讯作者:
Clemens,MG
影响因子:
--
作者:
H. ;T. Shibamoto;T. Miyahara
通讯作者:
T. Miyahara
DOI:
10.1152/ajpheart.1982.242.6.h1000
发表时间:
1982
期刊:
The American journal of physiology
影响因子:
--
作者:
Bennett,TD;MacAnespie,CL;Rothe,CF
通讯作者:
Rothe,CF