Document Detail


The interaction of convection and diffusion in the transport of 131I-albumin within the media of the rabbit thoracic aorta.
MedLine Citation:
PMID:  4064259     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The interaction of convection and diffusion in the transport of 131I-labeled albumin within the wall of rabbit thoracic aorta was studied in vessels excised at in vivo length. They were pressurized with a solution containing no tracer and immersed in a solution containing labeled albumin. The label then entered the wall tissue via the adventitia and had to diffuse against the convective flux which occurred from the lumen to the adventitia. Experiments were performed on intact and deendothelialized vessels pressurized to 70 and 180 mm Hg. At the end of each experiment the vessels were subjected to sequential frozen sectioning parallel to the lumenal surface. The radioactivity of the 20-micron-thick sections was determined and expressed as a tissue:labeled solution concentration ratio. Transmural profiles of these ratios were thus obtained. The steady state was found to be achieved by about 90 minutes. When the convection was enhanced by removal of the endothelium, the average ratios were lower than when the endothelium was intact, and the profile was much flatter. The results suggest that convection influenced macromolecular transport within the arterial wall, even in vessels with intact endothelium.
Authors:
A Tedgui; M J Lever
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Circulation research     Volume:  57     ISSN:  0009-7330     ISO Abbreviation:  Circ. Res.     Publication Date:  1985 Dec 
Date Detail:
Created Date:  1986-01-21     Completed Date:  1986-01-21     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0047103     Medline TA:  Circ Res     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  856-63     Citation Subset:  IM; S    
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MeSH Terms
Descriptor/Qualifier:
Animals
Aorta, Thoracic / metabolism*
Biological Transport
Blood Pressure
Diffusion
Endothelium / metabolism
Male
Rabbits
Serum Albumin / metabolism*
Chemical
Reg. No./Substance:
0/Serum Albumin

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


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