Document Detail


Evidence for a renomedullary vasodepressor system in rabbits and dogs.
MedLine Citation:
PMID:  1889845     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Renal perfusion was increased in anesthetized rabbits and dogs by using an extracorporeal circuit. When left kidney perfusion pressure was raised in rabbits (145-240 mm Hg), arterial pressure fell by 1.34 +/- 0.20 mm Hg/min. Pretreatment of the rabbits with 2-bromoethylamine hydrobromide, which destroyed the renal medulla, abolished the fall in arterial pressure (-0.08 +/- 0.08 mm Hg/min) in response to increased renal perfusion pressure. In dogs (with blockade of autonomic ganglia by pentolinium, converting enzyme inhibition [captopril/enalaprilat], and surgical renal denervation), increasing renal perfusion pressure to 170-220 mm Hg resulted in a fall in arterial pressure by 0.32 +/- 0.03 mm Hg/min (or by 28.9 +/- 3.1 mm Hg over a 90-minute period). Mean arterial pressure did not change significantly in identically prepared dogs not subjected to increased renal perfusion pressure, whereas pretreatment of dogs with bromoethylamine abolished the hypotensive response to increased renal perfusion pressure. Thus, the hypotensive response to increased renal perfusion was dependent on the presence of an intact renal medulla, but hypotension still occurred in the presence of converting enzyme inhibition, autonomic ganglion blockade, and renal denervation. The results provide in vivo evidence in two species that a vasodepressor factor from the renal medulla is released in response to increased renal perfusion.
Authors:
I J Christy; R L Woods; C A Courneya; K M Denton; W P Anderson
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Hypertension     Volume:  18     ISSN:  0194-911X     ISO Abbreviation:  Hypertension     Publication Date:  1991 Sep 
Date Detail:
Created Date:  1991-10-11     Completed Date:  1991-10-11     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7906255     Medline TA:  Hypertension     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  325-33     Citation Subset:  IM    
Affiliation:
Baker Medical Research Institute, Prahran, Victoria, Australia.
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MeSH Terms
Descriptor/Qualifier:
Animals
Diuresis
Dogs
Kidney Medulla / pathology,  physiology*
Perfusion
Pressure
Rabbits
Vasomotor System / physiology*

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


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