Document Detail


Esterification of fatty acids by bovine intramuscular and subcutaneous adipose tissues.
MedLine Citation:
PMID:  1349716     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Exogenous fatty acid esterification in intramuscular and subcutaneous adipose tissues from 72-hr fasted or ad libitum fed Angus cattle was investigated. Intramuscular (interfascicular) and subcutaneous adipose tissue snips were obtained from the longissimus dorsi muscle and were incubated with radioisotopically labeled fatty acids (palmitate, stearate, oleate, linoleate or linolenate) at three different concentrations (0.3 mM, 0.6 mM and 2.0 mM) to assess rates of fatty acid incorporation into glycerolipids. Rates of fatty acid esterification in vitro increased with fatty acid concentration in both intramuscular and subcutaneous adipose tissues. For all of the fatty acids investigated, triglycerides were the predominant products (60-85%). Subcutaneous adipose tissue had larger adipocytes and more actively (P less than 0.05) esterified fatty acids, with the exception of palmitate, than intramuscular adipose tissue. The rate of palmitate esterification was not different between tissues, although intramuscular adipose tissue esterified a greater proportion (P less than 0.10) of palmitate as triglyceride (85%) than did subcutaneous adipose tissue (75%). Relative rates of incorporation of fatty acids into lipids in intramuscular and subcutaneous adipose tissues were: palmitate greater than linolenate greater than linoleate greater than stearate. In general, 72-hr fasting did not significantly reduce the rates of fatty acid incorporation in bovine adipose tissues. Results of this study revealed that:i) rates of exogenous fatty acid incorporation into adipose tissue lipids were dependent on the medium fatty acid concentration and adipose tissue depot; and ii) the relative esterification rates of the various fatty acids in vitro did not necessarily reflect the proportion of these fatty acids in bovine adipose tissues.
Authors:
K C Lin; H R Cross; S B Smith
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Lipids     Volume:  27     ISSN:  0024-4201     ISO Abbreviation:  Lipids     Publication Date:  1992 Feb 
Date Detail:
Created Date:  1992-06-11     Completed Date:  1992-06-11     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  0060450     Medline TA:  Lipids     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  111-6     Citation Subset:  IM    
Affiliation:
Department of Animal Science, Texas A&M University, College Station 77843.
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MeSH Terms
Descriptor/Qualifier:
Adipose Tissue / metabolism*
Animals
Cattle
Esterification
Fasting / metabolism
Fatty Acids / metabolism*
Female
Glycerides / biosynthesis*
Linoleic Acid
Linoleic Acids / metabolism
Linolenic Acids / metabolism
Male
Muscles / metabolism*
Oleic Acid
Oleic Acids / metabolism
Orchiectomy
Palmitic Acid
Palmitic Acids / metabolism
Skin / metabolism*
alpha-Linolenic Acid
Chemical
Reg. No./Substance:
0/Fatty Acids; 0/Glycerides; 0/Linoleic Acids; 0/Linolenic Acids; 0/Oleic Acids; 0/Palmitic Acids; 112-80-1/Oleic Acid; 2197-37-7/Linoleic Acid; 463-40-1/alpha-Linolenic Acid; 57-10-3/Palmitic Acid

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


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