Cited by 1,213Cancer, Hypoxia, and MetabolismErythropoietin and Anemia TreatmentHemoglobin structure and function

Hypoxia-inducible factor 1 levels vary exponentially over a physiologically relevant range of O2 tension

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Jiang, B. H., Semenza, G. L., Bauer, C., Marti, H. H.·1996·American Journal of Physiology-Cell Physiology

Abstract

Hypoxia-inducible factor 1 (HIF-1) is a heterodimeric basic helix-loop-helix protein implicated in the transcriptional activation of genes encoding erythropoietin, glycolytic enzymes, and vascular endothelial growth factor in hypoxic mammalian cells. In this study, we have quantitated HIF-1 DNA-binding activity and protein levels of the HIF-1 alpha and HIF-1 beta subunits in human HeLa cells exposed to O2 concentrations ranging from 0 to 20% in the absence or presence of 1 mM KCN to inhibit oxidative phosphorylation and cellular O2 consumption. HIF-1 DNA-binding activity, HIF-1 alpha protein and HIF-1 beta protein each increased exponentially as cells were subjected to decreasing O2 concentrations, with a half maximal response between 1.5 and 2% O2 and a maximal response at 0.5% O2, both in the presence and absence of KCN. The HIF-1 response was greatest over O2 concentrations associated with ischemic/hypoxic events in vivo. These results provide evidence for the involvement of HIF-1 in O2 homeostasis and represent a functional characterization of the putative O2 sensor that initiates hypoxia signal transduction leading to HIF-1 expression.

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Crossref · 10.1152/ajpcell.1996.271.4.c1172

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Authors
Jiang, B. H., Semenza, G. L., Bauer, C., & Marti, H. H.
Affiliations
Johns Hopkins University (US)
Venue
American Journal of Physiology-Cell Physiology
Published
1996-10-01
Volume
271
Issue
4
Pages
C1172-C1180
ISSN
  • 0363-6143 (ISSN-L)
  • 1522-1563
OpenAlex
W1937401270
Cited by
1,213
References
32
Citations by year
2026: 12 · 2025: 22 · 2024: 22 · 2023: 23 · 2022: 30 · 2021: 47 · 2020: 26 · 2019: 34 · 2018: 29 · 2017: 30 · 2016: 46 · 2015: 47 · 2014: 32 · 2013: 51 · 2012: 50
FWCI
11.05
Type
journal article
Language
en
Open access
Locations
  • American Journal of Physiology-Cell Physiology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • American Heart Association
  • Johns Hopkins University
  • National Institutes of Health (5r01dk039869-16)
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01 DK39869)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
  • Health Sciences › Medicine › Hematology › Erythropoietin and Anemia Treatment
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Hemoglobin structure and function
Keywords
HIF-1, HIF-1α, oxygen partial pressure, oxygen homeostasis, oxygen sensors, hypoxia signaling, DNA-binding activity, cyanide, oxidative phosphorylation inhibition, HeLa cells, hypoxia
MeSH terms
Cell Nucleus, DNA-Binding Proteins, HeLa Cells, Humans, Nuclear Proteins, Oxygen, Potassium Cyanide, Transcription Factors, Blotting, Western, Gene Expression, Hypoxia-Inducible Factor 1, Hypoxia-Inducible Factor 1, alpha Subunit

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