Document Detail


Vascular RAA system.
MedLine Citation:
PMID:  8230086     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Biochemical and bioassay evidence has proved the existence of tissue RAA systems although their function has not been satisfactorily defined. There are two sources of tissue renin: uptake from plasma and local synthesis. The uptake system has been demonstrated in arterial tissue. Retention of renin can be demonstrated in the aortic wall and the presence of renin at this site is closely correlated with the persistent elevation of blood pressure. Renin gene expression can be demonstrated in several organs such as the liver, brain and arterial wall, although the function of renin or pro-renin at these sites is unknown. Intracellular angiotensin II receptors have been identified that play a role in regulating gene expression. In addition to raising vascular tone, angiotensin II generated in this way could have a trophic action upon cardiac and vascular structures. There is now very strong evidence in favour of the extrarenal RAA system having a pathogenetic role in some forms of hypertension. Renin gene polymorphisms co-segregate with blood pressure in some genetic models, despite normal or low plasma renin and incorporation of an additional mouse renin gene construct into the rat genome produces severe hypertension despite suppression of renal renin.
Authors:
J D Swales; N J Samani
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Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  Journal of human hypertension     Volume:  7 Suppl 2     ISSN:  0950-9240     ISO Abbreviation:  J Hum Hypertens     Publication Date:  1993 Aug 
Date Detail:
Created Date:  1993-12-08     Completed Date:  1993-12-08     Revised Date:  2005-11-16    
Medline Journal Info:
Nlm Unique ID:  8811625     Medline TA:  J Hum Hypertens     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  S3-6     Citation Subset:  IM    
Affiliation:
Department of Medicine, Leicester Royal Infirmary, UK.
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MeSH Terms
Descriptor/Qualifier:
Biological Assay
Blood Pressure
Blood Vessels / physiology*
Humans
Hypertension / physiopathology
Muscle, Smooth, Vascular / physiology
Renin-Angiotensin System / genetics,  physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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