Department of Pharmacology, Nantong University School of Pharmacy, Nantong, China
Research Article
Arginine Vasopressin Promotes Transient Contractile Responses through Distinct Mechanisms in Rat Aorta and Mesenteric Resistant Arteries
Author(s): Weizhong Zhu*, Aihua Yang, Yifeng Zhang, Yuhang Wang, Xiaojun Wang, Hairong Bao and Jun Ren
Background: Neurohormone-regulated peripheral vascular resistance is considered one of the factors governing
blood pressure. This study was designed to evaluate the effect of Arginine Vasopressin (AVP) on contraction of
endothelium-intact or denuded rat aorta and mesenteric resistant arteries.
Method: The wire myograph technique was used to assess the contractility of the vascular smooth muscles in
response to a high-K+, phenylephrine, AVP and inhibitors, etc. The time-course of agonist-evoked contraction
was then recorded. The endothelium of the mesenteric resistance arteries and abdominal aorta were denuded by
physical abrasion, as evidenced by acetylcholine-induced vasodilation dysfunction.
Results: The result revealed that: (1) AVP, but neither high K+ nor phenylephrine, evoke.. View more»