Cited by 410Lipid metabolism and disordersPeroxisome Proliferator-Activated ReceptorsCholesterol and Lipid Metabolism

Fibrates downregulate apolipoprotein C-III expression independent of induction of peroxisomal acyl coenzyme A oxidase. A potential mechanism for the hypolipidemic action of fibrates.

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Staels, B, Vu-Dac, N, Kosykh, V A, Saladin, R, Fruchart, J C, Dallongeville, J, Auwerx, J·1995·Journal of Clinical Investigation

Abstract

Epidemiological and transgenic animal studies have implicated apo C-III as a major determinant of plasma triglyceride metabolism. Since fibrates are very efficient in lowering triglycerides, it was investigated whether fibrates regulate apo C-III gene expression. Different fibrates lowered rat liver apo C-III mRNA levels up to 90% in a dose- and time-dependent manner, whereas intestinal apo C-III mRNA remained constant. This decrease in liver apo C-III mRNA was rapid (1 d) and reversible, since it was restored to control levels within 1 wk after cessation of treatment. In addition, fenofibrate treatment abolished the developmental rise of hepatic apo C-III mRNA observed during the suckling-weaning period. Administration of fibrates to rats induced liver and intestinal expression of the acyl CoA oxidase gene, the rate-limiting enzyme for peroxisomal beta-oxidation of fatty acids. In primary cultures of rat and human hepatocytes, fenofibric acid lowered apo C-III mRNA in a time- and dose-dependent manner. This reduction in apo C-III mRNA levels was accompanied by a decreased secretion of apo C-III in the culture medium of human hepatocytes. In rat hepatocytes fenofibric acid induced acyl CoA oxidase gene expression, whereas acyl CoA oxidase mRNA remained unchanged in human hepatocytes. Nuclear run-on and transient transfection experiments of a reporter construct driven by the human apo C-III gene promoter indicated that fibrates downregulate apo C-III gene expression at the transcriptional level. In conclusion, these studies demonstrate that fibrates decrease rat and human liver apo C-III gene expression. In humans the mechanisms appears to be independent of the induction of peroxisomal enzymes. This downregulation of liver apo C-III gene expression by fibrates may contribute to the hypotriglyceridemic action of these drugs.

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Authors
Staels, B., Vu-Dac, N., Kosykh, V. A., Saladin, R., Fruchart, J. C., Dallongeville, J., & Auwerx, J.
Affiliations
Institut Pasteur de Lille (FR)
Venue
Journal of Clinical Investigation
Published
1995-02-01
Volume
95
Issue
2
Pages
705-712
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2131037449
Cited by
410
References
59
Citations by year
2026: 4 · 2025: 4 · 2024: 1 · 2023: 6 · 2022: 8 · 2021: 4 · 2020: 5 · 2019: 6 · 2018: 11 · 2017: 10 · 2016: 8 · 2015: 9 · 2014: 7 · 2013: 7 · 2012: 5
FWCI
13.97
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Infoscience (Ecole Polytechnique Fédérale de Lausanne) (submittedVersion)
  • Infoscience (Ecole Polytechnique Fédérale de Lausanne) (submittedVersion, cc-by-nc-nd)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Lipid metabolism and disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Peroxisome Proliferator-Activated Receptors
  • Health Sciences › Medicine › Surgery › Cholesterol and Lipid Metabolism
Keywords
fibrates, fenofibrate, fenofibric acid, apolipoprotein C-III, gene downregulation, hepatic gene expression, transcriptional regulation, hepatocytes
MeSH terms
Aging, Animals, Apolipoproteins C, Base Sequence, Cells, Cultured, Enzyme Induction, Female, Gene Expression Regulation, Humans, Kinetics, Liver, Male, Microbodies, Molecular Sequence Data, Oxidoreductases, Pregnancy, Prenatal Exposure Delayed Effects, Fenofibrate, Polymerase Chain Reaction, Rats, Wistar, DNA Primers, Acyl-CoA Oxidase, Rats, Apolipoprotein C-III

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