Role of adipocyte lipid-binding protein (ALBP) and acyl-coA binding protein (ACBP) in PPAR-mediated transactivation.

Torben Helledie, Claus Jørgensen, Marianne Antonius, Ann M Krogsdam, Irina Kratchmarova, Karsten Kristiansen, Susanne Mandrup

Research output: Chapter in Book/Report/Conference proceedingBook chapterResearchpeer-review


Peroxisome proliferator-activated receptors (PPARs) are nuclear hormone receptors that are activated by a number of fatty acids and fatty acid derivatives. By contrast, we have recently shown that acyl-CoA esters display PPAR antagonistic properties in vitro. We have also shown that the adipocyte lipid binding protein (ALBP), the keratinocyte lipid binding protein (KLBP) and the acyl-CoA binding protein (ACBP) exhibit a prominent nuclear localization in differentiating 3T3-L1 adipocytes. Similarly, ectopic expression of these proteins in CV-1 cells resulted in a primarily nuclear localization. We therefore speculated that FABPs and ACBP might regulate the availability of PPAR agonists and antagonists by affecting not only their esterification in the cytoplasm but also their transport to and availability in the nucleus. We show here that coexpression of ALBP or ACBP exerts a negative effect on ligand-dependent PPAR transactivation, when tetradecylthioacetic (TTA) is used as ligand but not when the thiazolidinedione BRL49653 is used as ligand. The results presented here do not support the hypothesis that ALBP facilitates the transport of the fatty acid-type ligands to the nucleus, rather ALBP appears to sequester or increase the turn-over of the agonist. Similarly, our results are in keeping with a model in which ACBP increase the metabolism of these ligands.
Original languageEnglish
Title of host publicationCellular Lipid Binding Proteins
Publication date1. Oct 2002
ISBN (Print)978-1-4613-4868-9
ISBN (Electronic)978-1-4419-9270-3
Publication statusPublished - 1. Oct 2002
SeriesDevelopments in Molecular and Cellular Biochemistry


  • Acyl Coenzyme A
  • Adipocytes
  • Animals
  • Carrier Proteins
  • Cell Line
  • Diazepam Binding Inhibitor
  • Esters
  • Fatty Acid-Binding Proteins
  • Genes, Reporter
  • Neoplasm Proteins
  • Nuclear Proteins
  • Protein Isoforms
  • Receptors, Cytoplasmic and Nuclear
  • Recombinant Fusion Proteins
  • Trans-Activation (Genetics)
  • Transcription Factors


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