Cited by 316Fatty Acid Research and HealthLipid metabolism and biosynthesisDiet, Metabolism, and Disease

Polyunsaturated fatty acids suppress glycolytic and lipogenic genes through the inhibition of ChREBP nuclear protein translocation

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Dentin, R.·2005·Journal of Clinical Investigation

Abstract

Dietary polyunsaturated fatty acids (PUFAs) are potent inhibitors of hepatic glycolysis and lipogenesis. Recently, carbohydrate-responsive element-binding protein (ChREBP) was implicated in the regulation by glucose of glycolytic and lipogenic genes, including those encoding L-pyruvate kinase (L-PK) and fatty acid synthase (FAS). The aim of our study was to assess the role of ChREBP in the control of L-PK and FAS gene expression by PUFAs. We demonstrated in mice, both in vivo and in vitro, that PUFAs [linoleate (C18:2), eicosapentanoic acid (C20:5), and docosahexaenoic acid (C22:6)] suppressed ChREBP activity by increasing ChREBP mRNA decay and by altering ChREBP translocation from the cytosol to the nucleus, independently of an activation of the AMP-activated protein kinase, previously shown to regulate ChREBP activity. In contrast, saturated [stearate (C18)] and monounsaturated fatty acids [oleate (C18:1)] had no effect. Since glucose metabolism via the pentose phosphate pathway is determinant for ChREBP nuclear translocation, the decrease in xylulose 5-phosphate concentrations caused by a PUFA diet favors a PUFA-mediated inhibition of ChREBP translocation. In addition, overexpression of a constitutive nuclear ChREBP isoform in cultured hepatocytes significantly reduced the PUFA inhibition of both L-PK and FAS gene expression. Our results demonstrate that the suppressive effect of PUFAs on these genes is primarily caused by an alteration of ChREBP nuclear translocation. In conclusion, we describe a novel mechanism to explain the inhibitory effect of PUFAs on the genes encoding L-PK and FAS and demonstrate that ChREBP is a pivotal transcription factor responsible for coordinating the PUFA suppression of glycolytic and lipogenic genes.

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Crossref · 10.1172/jci25256

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Authors
Dentin, R.
Affiliations
Centre National de la Recherche Scientifique (FR)
Corresponding author
Dentin, R.
Venue
Journal of Clinical Investigation
Published
2005-10-01
Volume
115
Issue
10
Pages
2843-2854
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2114472618
Cited by
315
References
50
Citations by year
2026: 4 · 2025: 11 · 2024: 11 · 2023: 15 · 2022: 12 · 2021: 15 · 2020: 19 · 2019: 8 · 2018: 14 · 2017: 14 · 2016: 18 · 2015: 19 · 2014: 9 · 2013: 23 · 2012: 13
FWCI
16.21
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
Funders
  • European Commission (LSHMCT-2004-005272)
  • Ministère de l'Enseignement Supérieur et de la Recherche
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Fatty Acid Research and Health
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Lipid metabolism and biosynthesis
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diet, Metabolism, and Disease
Keywords
polyunsaturated fatty acids, ChREBP, nuclear translocation, hepatic glycolysis, lipogenesis, fatty acid synthase, mRNA degradation, xylulose-5-phosphate, pentose phosphate pathway, glucose metabolism, AMPK, linoleic acid, eicosapentaenoic acid, docosahexaenoic acid, saturated fatty acids, monounsaturated fatty acids, hepatocytes, transcriptional regulation
MeSH terms
Animals, Cells, Cultured, Dietary Fats, Unsaturated, Docosahexaenoic Acids, Glycolysis, Male, Multienzyme Complexes, Nuclear Proteins, Pentose Phosphate Pathway, Pyruvate Kinase, Transcription Factors, Eicosapentaenoic Acid, Down-Regulation, Gene Expression Regulation, Enzymologic, Protein Serine-Threonine Kinases, Hepatocytes, Lipogenesis, Mice, Basic Helix-Loop-Helix Leucine Zipper Transcription Factors, AMP-Activated Protein Kinases, Fatty Acid Synthases

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