Document Detail


Insulin induces fatty acid desaturase expression in human monocytes.
MedLine Citation:
PMID:  21413848     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Abstract Increasing evidence suggests that fatty acid desaturases, rate-limiting enzymes in unsaturated fatty acid biosynthesis, are important factors in the pathogenesis of lipid-induced insulin resistance. The conversion of dihomogamma linolenic acid (DGLA) into arachidonic acid (AA) in human plasma phospholipids has been shown to be regulated by insulin, suggesting a role for insulin in fatty acid desaturase 1 regulation. However insulin's role in monocyte inflammation associated with obesity and lifestyle disease development is uncertain. We therefore investigated if insulin is able to induce expression of stearoyl-CoA desaturase (SCD, Δ9 desaturase), fatty acid desaturase 1 (FADS1, Δ;5 desaturase), and fatty acid desaturase 2 (FADS2, Δ6 desaturase), as well as the sterol regulatory element binding transcription factor 1-c (SREBP-1c) in monocytes. Here, for the first time, we demonstrate that THP-1 monocytes are insulin-responsive in inducing expression of SCD, FADS1, and FADS2 in a time- and dose-dependent manner. Understanding secondary consequences of postprandial hyperinsulinemia may open up new strategies for prevention and/or treatment of obesity-related metabolic complications.
Authors:
Ingerid Arbo; Cathinka Halle; Darshan Malik; Hans-Richard Brattbakk; Berit Johansen
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-3-17
Journal Detail:
Title:  Scandinavian journal of clinical and laboratory investigation     Volume:  -     ISSN:  1502-7686     ISO Abbreviation:  -     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-3-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0404375     Medline TA:  Scand J Clin Lab Invest     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Department of Biology, Norwegian University of Science and Technology, Trondheim, Norway.
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