Cited by 168Glycogen Storage Diseases and MyoclonusMetabolism, Diabetes, and CancerBiochemical and Molecular Research

Regulation of Rat Liver Glucose-6-Phosphatase Gene Expression in Different Nutritional and Hormonal States: Gene Structure and 5′-Flanking Sequence

Argaud, Doriane, Zhang, Qing, Pan, Wansong, Maitra, Subir, Pilkis, Simon J, Lange, Alex J·1996·Diabetes

Abstract

The mRNA level of the catalytic subunit of rat liver glucose-6-phosphatase (Glu-6-Pase) was regulated by hormones commensurate with activity changes in vivo. Insulin exerts a dominant negative effect on the mRNA levels of Glu-6-Pase. Both mRNA levels and activities of the enzyme are low in the fed and refed state where insulin levels are elevated. Insulin administration to diabetic rats also decreases levels of mRNA and Glu-6-Pase activity. Insulin at a concentration of 1 nmol/l completely overcomes the stimulatory effect of glucocorticoids on Glu-6-Pase message levels in FAO hepatoma cells. The stimulatory response to glucocorticoid in FAO cells is biphasic, with maxima seen at 3 and 18 h after hormone addition (respectively 1.6- and 3.3-fold). 8-(4-chlorophenylthio)-cAMP (CPT-cAMP) causes a fourfold increase in Glu-6-Pase mRNA at 3 h in FAO cells. The gene of rat liver Glu-6-Pase is 13 kilobases in length and comprised of 5 exons. The exon-intron structure is completely conserved when compared with the mouse and human genes. A 0.5-kb 3′-untranslated region, which is present in rat and mouse liver Glu-6-Pase cDNA, is absent in the Glu-6-Pase gene reported here, indicating the possible duplication of either the terminal fifth exon or the entire gene. The promoter region contains a consensus core CCAAT element at position –207 and a TATAAA at position –31. Several possible response elements have been identified in the 5′-flanking region (from a HindIII site at position –1641). A consensus glucocorticoid response element is located at base pair –1552, a 9/10 match of the insulin response sequence is located at position –1449, and a 7/8 match of the cAMP response element is located at position –164.

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Crossref · 10.2337/diab.45.11.1563

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  • Starvation and diabetes cause a two- to threefold increase in gluconeogenic enzyme activity in the liver associated with a two- to fourfold increase in PEPCK and G-6-Pase mRNA.

    “Starvation and diabetes cause a two- to threefold increase in gluconeogenic enzyme activity in the liver that is associated with a two- to fourfold increase in PEPCK and G-6-Pase mRNA (1).”

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Authors
Argaud, D., Zhang, Q., Pan, W., Maitra, S., Pilkis, S. J., & Lange, A. J.
Affiliations
University of Minnesota (US)
Venue
Diabetes
Published
1996-11-01
Volume
45
Issue
11
Pages
1563-1571
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
OpenAlex
W2057486586
Cited by
168
References
0
Citations by year
2026: 1 · 2023: 3 · 2022: 5 · 2021: 1 · 2020: 5 · 2019: 2 · 2018: 5 · 2017: 4 · 2016: 5 · 2015: 3 · 2014: 4 · 2013: 8 · 2012: 6
FWCI
8.40
Type
journal article
Language
en
Open access
closed
Locations
  • Diabetes (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5r01dk046562-05)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK-46562)
Topics
  • Health Sciences › Medicine › Rheumatology › Glycogen Storage Diseases and Myoclonus
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Biochemical and Molecular Research
Keywords
glucose-6-phosphatase, gene expression regulation, liver, insulin, glucocorticoids, cAMP response element, promoter, 5'-flanking region, exon-intron structure, 3' untranslated region, gene duplication, TATA box, hepatic gluconeogenesis, diabetic rats, Fao hepatoma cells
MeSH terms
Cyclic AMP, Amino Acid Sequence, Animals, Base Sequence, Cell Nucleus, Diabetes Mellitus, Experimental, Dietary Carbohydrates, Eating, Exons, Fasting, Glucocorticoids, Glucose-6-Phosphatase, Humans, Insulin, Introns, Liver, Liver Neoplasms, Experimental, Male, Molecular Sequence Data, Nutritional Status, Thionucleotides, Transcription, Genetic, Tumor Cells, Cultured, Genomic Library, Gene Expression Regulation, Enzymologic, Rats, Sprague-Dawley, Dinucleotide Repeats, Mice, Rats

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