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:
Biomedical research
影响因子:
--
通讯作者:
Y. Kurata
Y. Kurata
中科院分区:
--
文献类型:
--
作者:
Wei Zhang;T. Shibamoto;Y. Kuda;Shohei Shinomiya;Y. Kurata

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加压素是一种血管活性肽,通过 V1a 加压素受体引起血管收缩。与其他血管收缩剂不同,加压素还具有血管舒张特性。本研究的目的是确定加压素对 Sprague-Dawley 大鼠肝脏和内脏循环的影响。这些实验不仅在离体的血液和恒定流量灌注的肝脏中进行,而且还在麻醉的自主呼吸大鼠中进行。在麻醉大鼠中,连续测量门静脉压(Ppv)、全身动脉压(Psa)、中心静脉压以及门静脉和肝动脉联合血流量的肝血流量(HBF),并测定由(Psa - Ppv)/HBF定义的内脏血管床阻力(Rspl)。在灌注的肝脏中,0.1-1,000 nM 的加压素引起微弱的静脉收缩,Ppv 小幅增加即可证明。在麻醉大鼠中,当将加压素以0.01-100 nmol/kg连续推注至门静脉时,Psa呈剂量依赖性增加,在100 nmol/kg时峰值增量为60 ± 18 mmHg。 Ppv 和 HBF 下降,导致 Rspl 增加,表明内脏血管收缩。总之,加压素对大鼠的肝静脉收缩作用较弱。加压素引起内脏血管收缩,导致麻醉大鼠的 HBF 和 Ppv 降低。
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.
加压素对全身能力的影响。
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
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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
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
加压素诱导大鼠肺血管舒张。
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
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一氧化氮介导的精氨酸加压素诱​​导的肾血管舒张。
DOI: 10.1159/000159082
发表时间: 1995
影响因子: 1.7
作者:
Rudichenko,VM;Beierwaltes,WH
通讯作者: Beierwaltes,WH