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International Journal of Hypertension
Volume 2012, Article ID 474870, 11 pages
http://dx.doi.org/10.1155/2012/474870
Review Article

Renin-Angiotensin System and Sympathetic Neurotransmitter Release in the Central Nervous System of Hypertension

1Cardiovascular and Metabolic Research Center, Kansai University of Health Sciences, Osaka 590-0482, Japan
2Division of Cardiology, Department of Medicine, Wakayama Medical University, Wakayama 641-8509, Japan

Received 24 August 2012; Accepted 18 October 2012

Academic Editor: Ovidiu C. Baltatu

Copyright © 2012 Kazushi Tsuda. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Many Studies suggest that changes in sympathetic nerve activity in the central nervous system might have a crucial role in blood pressure control. The present paper discusses evidence in support of the concept that the brain renin-angiotensin system (RAS) might be linked to sympathetic nerve activity in hypertension. The amount of neurotransmitter release from sympathetic nerve endings can be regulated by presynaptic receptors located on nerve terminals. It has been proposed that alterations in sympathetic nervous activity in the central nervous system of hypertension might be partially due to abnormalities in presynaptic modulation of neurotransmitter release. Recent evidence indicates that all components of the RAS have been identified in the brain. It has been proposed that the brain RAS may actively participate in the modulation of neurotransmitter release and influence the central sympathetic outflow to the periphery. This paper summarizes the results of studies to evaluate the possible relationship between the brain RAS and sympathetic neurotransmitter release in the central nervous system of hypertension.