Cited by 78Digestive system and related healthGenomics and Chromatin DynamicsMetabolism, Diabetes, and Cancer

Regulation of the human Na+-glucose cotransporter gene,SGLT1, by HNF-1 and Sp1

Martín, Martín G., Wang, Jiafang, Solorzano-Vargas, R. Sergio, Lam, Jason T., Turk, Eric, Wright, Ernest M.·2000·American Journal of Physiology-Gastrointestinal and Liver Physiology

Abstract

The Na+-glucose cotransporter ( SGLT1) is expressed primarily by small intestinal epithelial cells and transports the monosaccharides glucose and galactose across the apical membrane. Here we describe the isolation and characterization of 5.3 kb of the 5′-flanking region of the SGLT1 gene by transiently transfecting reporter constructs into a variety of epithelial cell lines. A fragment (nt −235 to +22) of the promoter showed strong activity in the intestinal cell line Caco-2 but was inactive in a nonintestinal epithelial cell line (Chinese hamster ovary). Within this region, three cis-elements, a hepatocyte nuclear factor-1 (HNF-1) and two GC box sites are critical for maintaining the gene's basal level of expression. The two GC boxes bind to several members of the Sp1 family of transcription factors and, in the presence of HNF-1, synergistically upregulate transactivation of the promoter. A novel 16-bp element just downstream of one GC box was also shown to influence the interaction of Sp1 to its binding site. In summary, we report the identification and characterization of the human SGLT1 minimal promoter and the critical role that HNF-1 and Sp1-multigene members have in enhancing the basal level of its transcription in Caco-2 cells.

Integrity signals

Registry

Crossref · 10.1152/ajpgi.2000.278.4.g591

Cites

46 of 46 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • An increase in SGLT-1 protein in the apical brush border of enterocytes occurs in a cAMP-dependent manner in response to basolateral signals, and secondary to increased SGLT-1 transcription and stabilization of the SGLT-1 transcript.

    “An increase in SGLT-1 protein in the apical brush border of enterocytes occurs in a cyclic AMP (cAMP)-dependent manner in response to transduction of basolateral signals (54,55), and secondary to an increase in SGLT-1 transcription (56) and stabilization (increased half-life) of the 3 ′ -untranslated region of the SGLT-1 transcript (57,58).”

Cites

Flagged first, then by citations

1 of the 47 references couldn’t be matched to a known paper.

Cited by

Sorted by citations

Authors
Martín, M. G., Wang, J., Solorzano-Vargas, R. S., Lam, J. T., Turk, E., & Wright, E. M.
Affiliations
  • Division of Gastroenterology and Nutrition, UCLA School of Medicine, Los Angeles 90095-1751; and
  • University of California, Los Angeles (US)
  • Departments of Physiology and Pediatrics,
Venue
American Journal of Physiology-Gastrointestinal and Liver Physiology
Published
2000-04-01
Volume
278
Issue
4
Pages
G591-G603
ISSN
  • 0193-1857 (ISSN-L)
  • 1522-1547
OpenAlex
W1868707770
Cited by
77
References
47
Citations by year
2024: 3 · 2023: 2 · 2022: 2 · 2020: 1 · 2019: 3 · 2018: 3 · 2017: 2 · 2016: 2 · 2015: 4 · 2014: 2 · 2013: 3 · 2012: 3
FWCI
2.53
Type
journal article
Language
en
Open access
closed
Locations
  • American Journal of Physiology-Gastrointestinal and Liver Physiology (publishedVersion)
  • PubMed (publishedVersion)
  • John Spoor Broome Library Institutional Repository (California State University) (submittedVersion)
Funders
  • National Institutes of Health (5r01dk044582-09)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK 44582)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (R01HD034706, HD 34706)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Digestive system and related health
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
Keywords
SGLT1, Na+/glucose cotransporter, HNF1, Sp1, Sp1 binding site, promoter regulation, 5'-flanking region, small intestinal epithelial cells, Caco-2 cells, transcriptional activation, intestinal glucose transport
MeSH terms
Animals, Base Sequence, Cell Line, Deoxyribonuclease I, DNA-Binding Proteins, Gene Expression Regulation, Multigene Family, Cricetinae, Humans, Membrane Glycoproteins, Molecular Sequence Data, Monosaccharide Transport Proteins, Nuclear Proteins, Promoter Regions, Genetic, Swine, Transcription Factors, Transfection, Sp1 Transcription Factor, CHO Cells, LLC-PK1 Cells, Caco-2 Cells, DNA Footprinting, Sodium-Glucose Transporter 1, Hepatocyte Nuclear Factor 1, Hepatocyte Nuclear Factor 1-alpha, Hepatocyte Nuclear Factor 1-beta

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review