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Activation of PPARdelta alters lipid metabolism in db/db mice

Academic Article
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Overview

authors

  • Leibowitz, M. D.
  • Fievet, C.
  • Hennuyer, N.
  • Peinado-Onsurbe, J.
  • Duez, H.
  • Berger, J.
  • Cullinan, C. A.
  • Sparrow, C. P.
  • Baffic, J.
  • Berger, G. D.
  • Santini, C.
  • Marquis, R. W.
  • Tolman, R. L.
  • Smith, Roy
  • Moller, D. E.
  • Auwerx, J.

publication date

  • May 2000

journal

  • FEBS Letters  Journal

abstract

  • Peroxisome proliferator-activated receptors (PPARs) are nuclear receptors, which heterodimerize with the retinoid X receptor and bind to peroxisome proliferator response elements in the promoters of regulated genes. Despite the wealth of information available on the function of PPARalpha and PPARgamma, relatively little is known about the most widely expressed PPAR subtype, PPARdelta. Here we show that treatment of insulin resistant db/db mice with the PPARdelta agonist L-165041, at doses that had no effect on either glucose or triglycerides, raised total plasma cholesterol concentrations. The increased cholesterol was primarily associated with high density lipoprotein (HDL) particles, as shown by fast protein liquid chromatography analysis. These data were corroborated by the chemical analysis of the lipoproteins isolated by ultracentrifugation, demonstrating that treatment with L-165041 produced an increase in circulating HDL without major changes in very low or low density lipoproteins. White adipose tissue lipoprotein lipase activity was reduced following treatment with the PPARdelta ligand, but was increased by a PPARgamma agonist. These data suggest both that PPARdelta is involved in the regulation of cholesterol metabolism in db/db mice and that PPARdelta ligands could potentially have therapeutic value.

subject areas

  • Acetates
  • Adipose Tissue
  • Animals
  • Blood Glucose
  • Cholesterol
  • Chromatography, Liquid
  • DNA-Binding Proteins
  • Ligands
  • Lipids
  • Lipoprotein Lipase
  • Lipoproteins
  • Male
  • Mice
  • Mice, Inbred C57BL
  • Mice, Mutant Strains
  • Phenols
  • Phenoxyacetates
  • Receptors, Cytoplasmic and Nuclear
  • Transcription Factors
  • Triglycerides
  • Ultracentrifugation
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Research

keywords

  • lipid metabolism
  • peroxisome proliferator-activated receptor
  • peroxisome proliferator-activated receptor delta agonist
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Identity

International Standard Serial Number (ISSN)

  • 0014-5793

Digital Object Identifier (DOI)

  • 10.1016/s0014-5793(00)01554-4

PubMed ID

  • 10818235
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Additional Document Info

start page

  • 333

end page

  • 336

volume

  • 473

issue

  • 3

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