Document Detail


Angiotensin mediated interaction of fetal kidney and placenta in the control of fetal arterial pressure and its role in hydrops fetalis.
MedLine Citation:
PMID:  9179925     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Fetal cardiovascular control is effected by an interaction of the fetal somatic and placental circulations. Three primary regulatory mechanisms are involved: transplacental transfer of extracellular fluid, driven by a difference in hydrostatic and oncotic pressures; modulation of fetal placental and somatic vascular resistances by means of blood pressure controlled production of angiotensin; and somatic autoregulation of flow. A systems analysis incorporates these and other fetal cardiovascular functions and this analysis was modelled for computer simulation. Given physiologically plausible values for known cardiovascular parameters in the fetal sheep, the model reproduced in detail a variety of experimental protocols with known outcomes; these included the normal fetus, the fetus after bilateral nephrectomy, the nephrectomized fetus infused with angiotensin, the intact fetus infused with NaCl solutions, the fetus with lymphatic obstruction and the severely anaemic fetus. The systems analysis demonstrated that fetal cardiac failure constituted the strongest stimulus for the formation of fetal oedema of any tested pathological intervention.
Authors:
J J Faber; D F Anderson
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.; Review    
Journal Detail:
Title:  Placenta     Volume:  18     ISSN:  0143-4004     ISO Abbreviation:  Placenta     Publication Date:  1997 May 
Date Detail:
Created Date:  1997-07-17     Completed Date:  1997-07-17     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  8006349     Medline TA:  Placenta     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  313-26     Citation Subset:  IM    
Affiliation:
Department of Physiology and Pharmacology, School of Medicine, Oregon Health Sciences University, Portland 97201-3098, USA.
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MeSH Terms
Descriptor/Qualifier:
Angiotensin II / physiology*
Animals
Blood Pressure*
Fetal Diseases / physiopathology
Fetus / physiology*
Humans
Hydrops Fetalis / physiopathology*
Kidney / embryology*
Nephrectomy
Placenta / blood supply,  physiopathology*
Grant Support
ID/Acronym/Agency:
HD-28965/HD/NICHD NIH HHS; HL-42893/HL/NHLBI NIH HHS
Chemical
Reg. No./Substance:
11128-99-7/Angiotensin II

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


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