The DOI matches its Crossref record; 56 of the 56 references it cites were found in a registry or an index.
Modulation of hypoxia-inducible factor-1 alpha in cultured primary cells by intracellular ascorbate
Abstract
Control of the transcription factor hypoxia inducible factor (HIF)-1 is mediated by hydroxylation by proline and asparagine hydroxylases. These enzymes require ascorbate for optimal activity, but little attention has been given to the effect of ascorbate on HIF-1 activation. Furthermore, cells in culture are ascorbate deficient. We investigated the effect of intracellular ascorbate on HIF-1alpha protein levels and on HIF-1-mediated gene expression in two human primary cell lines (umbilical vein endothelial cells and skin fibroblasts) and one human cancer cell line (A431 epithelial cells). Under normal culture conditions the cells contained no ascorbate and adding ascorbate to the medium increased intracellular concentrations in a dose-dependent manner. A basal level of HIF-1alpha detected in nonsupplemented cells under normoxic conditions disappeared when 10 microM ascorbate was added to the medium. Induction of HIF-1alpha by hypoxia (1% O(2)) or by CoCl(2) was markedly inhibited by ascorbate and loading with physiological levels resulted in almost complete reversal of HIF-1alpha stabilisation. Gene expression was similarly affected, with VEGF mRNA and GLUT-1 up-regulation being inhibited by ascorbate. Hence intracellular ascorbate is a major regulator of the hypoxic response in normal cells and optimal levels of this vitamin will have a profound effect on HIF-1-regulated processes.
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“Through the stimulation of regulatory hydroxylases, vitamin C also regulates the stabilization and activation of the hypoxia-inducible factor (HIF)-1, a metabolic sensor that controls the expression of hundreds of genes involved with cell survival and tissue remodelling, including collagenases [103,104,105].”
From The Roles of Vitamin C in Skin Health. (2017) · cites this paper as [103]
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Self-citationCharacterization of the human prolyl 4-hydroxylases that modify the hypoxia-inducible factor
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Metadata
- Authors
- Vissers, M. C. M., Gunningham, S. P., Morrison, M. J., Dachs, G. U., & Currie, M. J.
- Corresponding author
- Vissers, Margret C.M.
- Venue
- Free Radical Biology and Medicine
- Publisher
- Elsevier BV
- Published
- 2007-03
- Volume
- 42
- Issue
- 6
- Pages
- 765-772
- ISSN
- 0891-5849 (ISSN-L)
- OpenAlex
- W1984689645
- Cited by
- 125
- References
- 56
- Citations by year
- 2026: 4 · 2025: 3 · 2024: 9 · 2023: 3 · 2022: 4 · 2021: 2 · 2020: 5 · 2019: 9 · 2018: 4 · 2017: 7 · 2016: 8 · 2015: 5 · 2014: 15 · 2013: 8 · 2012: 7
- FWCI
- 1.95
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Free Radical Biology and Medicine (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Chinese Academy of Agricultural Sciences
- Health Research Council of New Zealand
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
- Health Sciences › Nursing › Nutrition and Dietetics › Vitamin C and Antioxidants Research
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Angiogenesis and VEGF in Cancer
- Keywords
- hypoxia-inducible factor-1α, vitamin C, prolyl hydroxylase, asparaginyl hydroxylase, HIF-1α stabilization, hypoxia response, vascular endothelial growth factor, GLUT1, umbilical vein endothelial cells, dermal fibroblasts, cobalt chloride, normoxia
- MeSH terms
- Hypoxia, Ascorbic Acid, Cells, Cultured, Dose-Response Relationship, Drug, Endothelium, Vascular, Fibroblasts, Gene Expression Regulation, Humans, RNA, Messenger, Blotting, Western, Vascular Endothelial Growth Factor A, Cell Line, Tumor, Glucose Transporter Type 1, Hypoxia-Inducible Factor 1, alpha Subunit
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