Document Detail


Effect of CO2 concentration on phosphatidylcholine and phosphatidylglycerol metabolism in surfactant and residual lung fractions.
MedLine Citation:
PMID:  16977     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
An investigation of the effect of change of total CO(2) concentration from 7 to 43 mM at pH 7.35 in the medium perfusing isolated rat lungs on [U-(14)C]glucose incorporation into lung phospholipids has been carried out. The incorporation of [U-(14)C]glucose into phosphatidylcholine and phosphatidylglycerol of the surfactant fraction and of the remaining lung tissue (residual fraction) was observed. Increased CO(2) concentration increased [U-(14)C]glucose incorporation into phosphatidylcholine of the surfactant fraction and residual fraction by 43 and 50%, respectively, during a 2 hr perfusion. Likewise, incorporation of [U-(14)C]glucose into phosphatidylglycerol was increased 22 and 34% into the surfactant and residual fractions, respectively. The percentage of [U-(14)C]glucose incorporated into the fatty acid moieties of phosphatidylcholine of both fractions increased as a result of increased CO(2) concentration. The increase in the incorporation of [U-(14)C]glucose into the fatty acid moieties of phosphatidylcholine was confirmed by an average increase of 56 and 77% in the specific activity of palmitic acid isolated from phosphatidylcholine of the surfactant and residual fraction, respectively, as a result of increased CO(2) concentration. The results suggest that alteration in extracellular CO(2) concentration affects the de novo synthesis from glucose of phosphatidylcholine and phosphatidylglycerol of the surfactant-lipoprotein fraction of lung.
Authors:
W J Longmore; J T Mourning
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of lipid research     Volume:  18     ISSN:  0022-2275     ISO Abbreviation:  J. Lipid Res.     Publication Date:  1977 May 
Date Detail:
Created Date:  1977-07-18     Completed Date:  1977-07-18     Revised Date:  2007-03-22    
Medline Journal Info:
Nlm Unique ID:  0376606     Medline TA:  J Lipid Res     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  309-13     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Carbon Dioxide / pharmacology*
Glucose / metabolism
Hydrogen-Ion Concentration
Kinetics
Lung / drug effects,  metabolism*
Male
Palmitic Acids / biosynthesis
Perfusion
Phosphatidylcholines / metabolism*
Phosphatidylglycerols / metabolism*
Pulmonary Surfactants / metabolism*
Rats
Chemical
Reg. No./Substance:
0/Palmitic Acids; 0/Phosphatidylcholines; 0/Phosphatidylglycerols; 0/Pulmonary Surfactants; 124-38-9/Carbon Dioxide; 50-99-7/Glucose

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


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