Cited by 969Cancer, Hypoxia, and MetabolismAngiogenesis and VEGF in CancerCancer-related Molecular Pathways

Regulation of tumor angiogenesis by p53-induced degradation of hypoxia-inducible factor 1α

Open access
Ravi, Rajani, Mookerjee, Bijoyesh, Bhujwalla, Zaver M., Sutter, Carrie Hayes, Artemov, Dmitri, Zeng, Qinwen, Dillehay, Larry E., Madan, Ashima +2 more·2000·Genes & Development

Abstract

The switch to an angiogenic phenotype is a fundamental determinant of neoplastic growth and tumor progression. We demonstrate that homozygous deletion of the p53 tumor suppressor gene via homologous recombination in a human cancer cell line promotes the neovascularization and growth of tumor xenografts in nude mice. We find that p53 promotes Mdm2-mediated ubiquitination and proteasomal degradation of the HIF-1α subunit of hypoxia-inducible factor 1 (HIF-1), a heterodimeric transcription factor that regulates cellular energy metabolism and angiogenesis in response to oxygen deprivation. Loss of p53 in tumor cells enhances HIF-1α levels and augments HIF-1-dependent transcriptional activation of the vascular endothelial growth factor (VEGF) gene in response to hypoxia. Forced expression of HIF-1α in p53-expressing tumor cells increases hypoxia-induced VEGF expression and augments neovascularization and growth of tumor xenografts. These results indicate that amplification of normal HIF-1-dependent responses to hypoxia via loss of p53 function contributes to the angiogenic switch during tumorigenesis.

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Crossref · 10.1101/gad.14.1.34

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  • Beyond canonical HRE-driven transcription, HIF isoforms differentially affect signaling pathways by interacting with non-PAS proteins such as p53, c-MYC, β-catenin, and the Notch intracellular domain.

    “Apart from canonical HRE-mediated transcription, the HIF isoforms differentially modulate signaling pathways through interaction with proteins that do not contain PAS domains, such p53, the c-MYC proto-oncogene, β-catenin and the Notch intracellular domain (Fig. 2A) [11–15].”

    From Revisiting the HIF switch in the tumor and its immune microenvironment. (2022) · cites this paper as [11]

    The section ‘p53 promotes ubiquitin-dependent [degradation] of HIF-1α’ reports that HIF-1α co-immunoprecipitates with p53, supporting p53 as an interaction partner. The paper shows p53 promoting HIF-1α degradation, however; it does not establish that HIF isoforms differentially modulate signaling through this interaction. The other listed proteins are not the part this citation supports. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • p53 can promote Mdm2-mediated degradation of HIF-1α.

    “Intriguingly, p53 can also promote Mdm2-mediated degradation of HIF-1α (Ravi et al., 2000).”

    From Therapeutic targeting of hypoxia and hypoxia-inducible factors in cancer (2016) · cites this paper as Ravi et al., 2000

  • miR-17 mediates cellular response to diverse stimuli by targeting closely related signaling pathways.

    “which raises the possibility that miR-17 mediates cellular response to diverse stimuli by targeting closely related signaling pathways [56].”
  • MDM2 can ubiquitinate and degrade HIF-1α through the proteasome pathway.

    “It has been proposed that MDM2 can also ubiquitinate and degrade HIF-1α through the proteasome pathway”

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Authors
Ravi, R., Mookerjee, B., Bhujwalla, Z. M., Sutter, C. H., Artemov, D., Zeng, Q., Dillehay, L. E., Madan, A., Semenza, G. L., & Bedi, A.
Affiliations
Johns Hopkins University (US)
Venue
Genes & Development
Published
2000-01-01
Volume
14
Issue
1
Pages
34-44
ISSN
  • 0890-9369 (ISSN-L)
  • 1549-5477
OpenAlex
W4294718043
Cited by
967
References
70
Citations by year
2026: 19 · 2025: 23 · 2024: 35 · 2023: 28 · 2022: 35 · 2021: 35 · 2020: 33 · 2019: 25 · 2018: 30 · 2017: 25 · 2016: 35 · 2015: 41 · 2014: 36 · 2013: 34 · 2012: 32
Type
posted content
Language
en
Open access
Locations
Genes & Development (publishedVersion)
Funders
  • U.S. Department of Defense
  • American Cancer Society
  • National Institutes of Health
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Angiogenesis and VEGF in Cancer
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
Keywords
tumor angiogenesis, p53, hypoxia-inducible factor-1α, MDM2, ubiquitination, proteasomal degradation, vascular endothelial growth factor, hypoxia, neovascularization, tumor xenografts, angiogenic switch, tumor suppressor

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