Document Detail


Increased lymphatic flux of hyaluronan from cat intestine during fat absorption.
MedLine Citation:
PMID:  1636716     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
During fat absorption, chylomicrons with sizes up to 5,000-10,000 A must traverse an interstitium that has estimated pore sizes of 120-200 A to reach the lacteals. The present experiments were performed to study the behavior of the interstitial matrix component hyaluronan during fat absorption from the intestine. Ileal segments were isolated and autoperfused in pentobarbital-anesthetized cats. A postnodal lymphatic was cannulated, and lymph flow, protein, and hyaluronan concentration in lymph were determined. In group 1, a mixture of oleic acid and taurocholate was infused into the ileal lumen, while in group 2 the animals were fed cream overnight. In group 1, control lymph flow and hyaluronan concentration averaged 53.3 +/- 16.0 (SD) microliters.min-1.100 g intestine-1 and 21.4 +/- 16.0 micrograms/ml, respectively. Administration of taurocholate and oleic acid increased lymph flow and lymph hyaluronan concentration by 100 and 50%, respectively, resulting in a nearly three-fold increase in hyaluronan flux. Subsequent increases in venous pressure increased lymph flow and reduced hyaluronan concentration in lymph to less than 3 micrograms/ml. Hyaluronan flux remained approximately 2 micrograms.min-1.100 g intestine-1 independent of lymph flow. In group 2, no lymph sample was available before administration of fat. Hyaluronan concentration at control venous pressure was 19.3 +/- 6.7 micrograms/ml and fell to 10 micrograms/ml at the highest lymph flow. Hyaluronan flux was approximately 10 micrograms.min-1.100 g intestine-1 at the highest lymph flow and venous pressure (P less than 0.05 compared with the same lymph flow in group 1).(ABSTRACT TRUNCATED AT 250 WORDS)
Authors:
R K Reed; M I Townsley; V H Pitts; T C Laurent; A E Taylor
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Publication Detail:
Type:  In Vitro; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The American journal of physiology     Volume:  263     ISSN:  0002-9513     ISO Abbreviation:  Am. J. Physiol.     Publication Date:  1992 Jul 
Date Detail:
Created Date:  1992-08-21     Completed Date:  1992-08-21     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0370511     Medline TA:  Am J Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  G6-11     Citation Subset:  IM    
Affiliation:
Department of Physiology, University of South Alabama, Mobile 36688.
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MeSH Terms
Descriptor/Qualifier:
Absorption
Animals
Cats
Fats / pharmacokinetics*
Hyaluronic Acid / metabolism*
Intestines / metabolism*
Lymphatic System / metabolism*
Milk
Oleic Acid
Oleic Acids / metabolism
Osmolar Concentration
Proteins / metabolism
Taurocholic Acid / metabolism
Grant Support
ID/Acronym/Agency:
HL-39045/HL/NHLBI NIH HHS
Chemical
Reg. No./Substance:
0/Fats; 0/Oleic Acids; 0/Proteins; 112-80-1/Oleic Acid; 81-24-3/Taurocholic Acid; 9004-61-9/Hyaluronic Acid

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


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