Cited by 794Angiogenesis and VEGF in CancerCancer, Hypoxia, and MetabolismKruppel-like factors research

Differential Transcriptional Regulation of the Two Vascular Endothelial Growth Factor Receptor Genes

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Gerber, Hans-Peter, Condorelli, Fabrizio, Park, Jeanie, Ferrara, Napoleone·1997·Journal of Biological Chemistry

Abstract

Vascular endothelial growth factor (VEGF) and its two endothelial cell-specific receptor tyrosine kinases, Flk-1/KDR and Flt-1, play a key role in physiological and pathological angiogenesis. Hypoxia has been shown to be a major mechanism for up-regulation of VEGF and its receptors in vivo. When we exposed human umbilical vein endothelial cells to hypoxic conditions in vitro, we observed increased levels of Flt-1 expression. In contrast, Flk-1/KDR mRNA levels were unchanged or slightly repressed. These findings suggest a differential transcriptional regulation of the two receptors by hypoxia. To identify regulatory elements involved in the hypoxic response, promoter regions of the mouse Flt-1 and Flk-1/KDR genes were isolated and tested in conjunction with luciferase reporter gene. In transient transfection assays, hypoxia led to strong transcriptional activation of the Flt-1 promoter, whereas Flk-1/KDR transcription was essentially unchanged. Promoter deletion analysis demonstrated a 430-bp region of the Flt-1 promoter to be required for transcriptional activation in response to hypoxia. This region includes a heptamer sequence matching the hypoxia-inducible factor-1 (HIF) consensus binding site previously found in other hypoxia-inducible genes such as the VEGF gene and erythropoietin gene. We further narrowed down the element mediating the hypoxia response to a 40-base pair sequence including the putative HIF binding site. We show that this element acts like an enhancer, since it activated transcription irrespective of its location or orientation in the construct. Furthermore, mutations within the putative HIF consensus binding site lead to impaired transcriptional activation by hypoxia. These findings indicate that, unlike the KDR/Flk-1 gene, the Flt-1 receptor gene is directly up-regulated by hypoxia via a hypoxia-inducible enhancer element located at positions -976 to -937 of the Flt-1 promoter.

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Crossref · 10.1074/jbc.272.38.23659

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  • Macrophage-secreted growth factors such as VEGF, VEGFR1, VEGFR2, PDGF, FGF, and TGF-β are induced by hypoxia.

    “Macrophage-secreted growth factors such as vascular endothelial growth factor (VEGF) and its receptor VEGFR1 and VEGFR2, platelet-derived growth factor (PDGF), fibroblast growth factor (FGF), and transforming growth factor-β (TGF-β) have been reported to be induced by hypoxia [76,77,78].”

    From The Pathogenesis of Adenomyosis vis-à-vis Endometriosis (2020) · cites this paper as [77]

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Authors
Gerber, H.-P., Condorelli, F., Park, J., & Ferrara, N.
Affiliations
Genentech (US)
Corresponding author
Ferrara, Napoleone
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
1997-09
Volume
272
Issue
38
Pages
23659-23667
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2020968632
Cited by
794
References
50
Citations by year
2026: 5 · 2025: 9 · 2024: 10 · 2023: 10 · 2022: 18 · 2021: 19 · 2020: 14 · 2019: 13 · 2018: 21 · 2017: 14 · 2016: 7 · 2015: 30 · 2014: 24 · 2013: 32 · 2012: 34
FWCI
9.36
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Angiogenesis and VEGF in Cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Kruppel-like factors research
Keywords
vascular endothelial growth factor receptor, Flt-1, KDR/Flk-1, hypoxia, transcriptional regulation, HIF-1, enhancers, promoter analysis, angiogenesis, human umbilical vein endothelial cells, VEGF receptors
MeSH terms
Amino Acid Sequence, Animals, Base Sequence, Cell Line, HeLa Cells, Humans, Molecular Sequence Data, Proto-Oncogene Proteins, RNA, Messenger, Sequence Homology, Nucleic Acid, Transcription, Genetic, Cell Hypoxia, Up-Regulation, Endothelial Growth Factors, Receptors, Growth Factor, Receptor Protein-Tyrosine Kinases, Receptors, Vascular Endothelial Growth Factor, Vascular Endothelial Growth Factor Receptor-1, Mice

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