Linked Life Data

7827285

Source:http://linkedlifedata.com/resource/pubmed/id/7827285

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
1995-2-17
pubmed:abstractText
Previous studies have demonstrated that some cytokines induce a coordinate catabolic response in adipose cells which leads to decreased fat storage. The mechanisms by which cytokines cause these effects are unknown. The primary purpose of the present study was to determine the effects of TNF, IL-1, IFN-alpha and IFN-alpha on the mRNA levels of the key enzymes involved in fat metabolism in 3T3-F442A adipocytes. TNF, IL-1, IFN-alpha and IFN-gamma decreased lipoprotein lipase activity and increased lipolysis in adipocytes. TNF, IFN-alpha and IFN-gamma decreased fatty acid synthesis while IL-1 increased fatty acid synthesis. However, the cytokine effects on mRNA levels were not always consistent with the observed changes in activity and were unique for each cytokine. Specifically, while all cytokines decreased LPL activity, only TNF and IFN-gamma decreased LPL mRNA levels. In addition, while TNF, IFN-alpha and IFN-gamma decreased fatty acid synthesis, only TNF significantly decreased the mRNA levels of both acetyl CoA carboxylase and fatty acid synthase, the key enzymes in fatty acid synthesis. IFN-alpha and IFN-gamma decreased fatty acid synthase mRNA levels without significantly altering acetyl CoA carboxylase mRNA. IL-1 caused a slight increase in fatty acid synthesis and increased acetyl CoA carboxylase mRNA levels. Finally, while all cytokines increased lipolysis, hormone sensitive lipase mRNA levels were decreased by TNF, IFN-alpha and IFN-gamma treatment. These results indicate that the regulation of adipocyte lipid metabolism by cytokines is complex and that coordinate changes in mRNA levels cannot account for the observed metabolic changes.(ABSTRACT TRUNCATED AT 250 WORDS)
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
1043-4666
pubmed:author
pubmed:issnType
Print
pubmed:volume
6
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
478-84
pubmed:dateRevised
2011-11-17
pubmed:meshHeading
pubmed:year
1994
pubmed:articleTitle
Cytokines induce catabolic effects in cultured adipocytes by multiple mechanisms.
pubmed:affiliation
Department of Medicine, University of California, San Francisco.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S.