The direct peroxisome proliferator-activated receptor target fasting-induced adipose factor (FIAF/PGAR/ANGPTL4) is present in blood plasma as a truncated protein that is increased by fenofibrate treatment.

Détails

ID Serval
serval:BIB_DE95C5E5D38E
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
The direct peroxisome proliferator-activated receptor target fasting-induced adipose factor (FIAF/PGAR/ANGPTL4) is present in blood plasma as a truncated protein that is increased by fenofibrate treatment.
Périodique
Journal of Biological Chemistry
Auteur(s)
Mandard S., Zandbergen F., Tan N.S., Escher P., Patsouris D., Koenig W., Kleemann R., Bakker A., Veenman F., Wahli W., Müller M., Kersten S.
ISSN
0021-9258
Statut éditorial
Publié
Date de publication
2004
Peer-reviewed
Oui
Volume
279
Numéro
33
Pages
34411-34420
Langue
anglais
Notes
Publication types: Journal Article
Résumé
The fasting-induced adipose factor (FIAF, ANGPTL4, PGAR, HFARP) was previously identified as a novel adipocytokine that was up-regulated by fasting, by peroxisome proliferator-activated receptor agonists, and by hypoxia. To further characterize FIAF, we studied regulation of FIAF mRNA and protein in liver and adipose cell lines as well as in human and mouse plasma. Expression of FIAF mRNA was up-regulated by peroxisome proliferator-activated receptor alpha (PPARalpha) and PPARbeta/delta agonists in rat and human hepatoma cell lines and by PPARgamma and PPARbeta/delta agonists in mouse and human adipocytes. Transactivation, chromatin immunoprecipitation, and gel shift experiments identified a functional PPAR response element within intron 3 of the FIAF gene. At the protein level, in human and mouse blood plasma, FIAF was found to be present both as the native protein and in a truncated form. Differentiation of mouse 3T3-L1 adipocytes was associated with the production of truncated FIAF, whereas in human white adipose tissue and SGBS adipocytes, only native FIAF could be detected. Interestingly, truncated FIAF was produced by human liver. Treatment with fenofibrate, a potent PPARalpha agonist, markedly increased plasma levels of truncated FIAF, but not native FIAF, in humans. Levels of both truncated and native FIAF showed marked interindividual variation but were not associated with body mass index and were not influenced by prolonged semistarvation. Together, these data suggest that FIAF, similar to other adipocytokines such as adiponectin, may partially exert its function via a truncated form.
Mots-clé
3T3-L1 Cells, Adipocytes/metabolism, Adipokines/metabolism, Adiponectin, Adipose Tissue/metabolism, Angiopoietins, Animals, Base Sequence, Blotting, Western, Cell Differentiation, Cell Line, Cell Line, Tumor, Cells, Cultured, Chromatin/metabolism, Cytokines/metabolism, Humans, Intercellular Signaling Peptides and Proteins/blood, Introns, Liver/metabolism, Mice, Mice, Inbred C57BL, Molecular Sequence Data, Precipitin Tests, Procetofen/metabolism, Procetofen/pharmacology, Proteins/metabolism, RNA/metabolism, RNA, Messenger/metabolism, Rats, Receptors, Cytoplasmic and Nuclear/metabolism, Reverse Transcriptase Polymerase Chain Reaction, Transcription Factors/metabolism, Transcription, Genetic, Transcriptional Activation, Up-Regulation
Pubmed
Web of science
Open Access
Oui
Création de la notice
24/01/2008 17:04
Dernière modification de la notice
20/08/2019 17:03
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