Malfunction of Vascular Control in Lifestyle-Related Diseases: Oxidative Stress of Angiotensin II-induced Hypertension: Mitogen-Activated Protein Kinases and Blood Pressure Regulation

• Main Authors: Shoji Kimura (Author), Guo-Xing Zhang (Author), Youichi Abe (Author)
• Format: Book
• Published: Elsevier, 2004-01-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.
• Notes: 1347-8613; 10.1254/jphs.fmj04006x5
• Keywords: Therapeutics. Pharmacology; RM1-950
• Source: Journal of Pharmacological Sciences, Vol 96, Iss 4, Pp 406-410 (2004)

The candidate mechanisms for maintaining hypertension in a chronically angiotensin II (Ang II)-infused state include direct vasoconstriction of the vasculature, disturbance of renal water/sodium handling, and central/peripheral sympathetic nerve regulation of hemodynamics. The involvement of reactive oxygen species (ROS) has been studied in these proposed mechanisms and the importance of ROS in progression of Ang II-induced hypertension has been accepted. We recently reported ROS-sensitive blood pressure regulation in chronically as well as acutely Ang II-infused hypertensive rats. The facts suggested that mechanisms for maintaining high peripheral vascular resistance in chronically Ang II-infused hypertensive rats were different from those involved in the acute hypertensive response to Ang II from the perspective of ROS sensitivity and that there must be a time-dependent transition from ROS-non-sensitive to ROS-sensitive vasoconstriction during prolonged Ang II infusion. In this review, we introduced our recent work describing the time transition of ROS sensitivity in Ang II-induced hypertension and activation of cardiovascular mitogen-activated protein kinase (MAPK) in acute and chronic phases Ang II infusion in conscious rats. Keywords:: angiotensin, vasoconstriction, tempol, superoxide anion, mitogen-activated protein kinase