Cited by 40Cancer, Hypoxia, and MetabolismRenal cell carcinoma treatmentErythropoietin and Anemia Treatment

Factor inhibiting HIF (FIH-1) promotes renal cancer cell survival by protecting cells from HIF-1α-mediated apoptosis

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Khan, M N, Bhattacharyya, T, Andrikopoulos, P, Esteban, M A, Barod, R, Connor, T, Ashcroft, M, Maxwell, P H +1 more·2011·British Journal of Cancer

Abstract

BACKGROUND: Clear cell renal cell carcinoma (CCRCC) is the commonest form of kidney cancer. Up to 91% have biallelic inactivation of VHL, resulting in stabilisation of HIF-α subunits. Factor inhibiting HIF-1 is an enzyme that hydroxylates HIF-α subunits and prevents recruitment of the co-activator CBP/P300. An important question is whether FIH-1 controls HIF activity in CCRCC. METHODS: Human VHL defective CCRCC lines RCC10, RCC4 and 786-O were used to determine the role of FIH-1 in modulating HIF activity, using small interfering RNA knockdown, retroviral gene expression, quantitative RT-PCR, western blot analysis, Annexin V and propidium iodide labelling. RESULTS: Although it was previously suggested that FIH-1 is suppressed in CCRCC, we found that FIH-1 mRNA and protein are actually present at similar levels in CCRCC and normal kidney. The FIH-1 inhibition or knockdown in the VHL defective CCRCC lines RCC10 and RCC4 (which express both HIF-1α and HIF-2α) resulted in increased expression of HIF target genes. In the 786-O CCRCC cell line, which expresses only HIF-2α, FIH-1 attenuation showed no significant effect on expression of these genes; introduction of HIF-1α resulted in sensitivity of HIF targets to FIH-1 knockdown. In RCC4 and RCC10, knockdown of FIH-1 increased apoptosis. Suppressing HIF-1α expression in RCC10 prevented FIH-1 knockdown from increasing apoptosis. CONCLUSION: Our results support a unifying model in which HIF-1α has a tumour suppressor action in CCRCC, held in check by FIH-1. Inhibiting FIH-1 in CCRCC could be used to bias the HIF response towards HIF-1α and decrease tumour cell viability.

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Crossref · 10.1038/bjc.2011.73

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  • HIF-1α is more sensitive to FIH-1-mediated inhibition than HIF-2α due to a specific amino acid difference between the two HIFs.

    “Of note, HIF-1α is more sensitive to FIH-1-mediated inhibition than HIF-2α (Khan et al., 2011) due to a specific amino acid difference between the two HIFs (Bracken et al., 2006).”

    From Therapeutic targeting of hypoxia and hypoxia-inducible factors in cancer (2016) · cites this paper as Khan et al., 2011

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Authors
Khan, M. N., Bhattacharyya, T., Andrikopoulos, P., Esteban, M. A., Barod, R., Connor, T., Ashcroft, M., Maxwell, P. H., & Kiriakidis, S.
Affiliations
  • University College London (GB)
  • Chinese Academy of Sciences (CN)
Corresponding author
Maxwell, P H
Venue
British Journal of Cancer
Published
2011-03
Volume
104
Issue
7
Pages
1151-1159
ISSN
  • 0007-0920 (ISSN-L)
  • 1532-1827
OpenAlex
W2030204259
Cited by
40
References
43
Citations by year
2024: 1 · 2023: 3 · 2022: 4 · 2021: 3 · 2020: 2 · 2019: 3 · 2018: 2 · 2017: 2 · 2016: 5 · 2015: 4 · 2014: 6 · 2013: 2 · 2012: 2
FWCI
1.09
Type
journal article
Language
en
Open access
Locations
  • British Journal of Cancer (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Queen Mary Research Online (Queen Mary University of London) (submittedVersion, cc-by-nc-sa)
  • UCL Discovery (University College London) (submittedVersion)
  • Apollo (University of Cambridge) (submittedVersion, cc-by-nc-sa)
  • Apollo
Funders
  • National Institute for Health and Care Research (NF-SI-0507-10315)
  • British Heart Foundation
  • European Commission
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Renal cell carcinoma treatment
  • Health Sciences › Medicine › Hematology › Erythropoietin and Anemia Treatment
Keywords
FIH-1, HIF-1α, HIF-2α, clear cell renal cell carcinoma, VHL inactivation, apoptosis, tumor cell survival, HIF target genes, tumour suppressor
MeSH terms
Endothelial PAS Domain-Containing Protein 1, Amino Acids, Dicarboxylic, Cell Survival, Humans, Mixed Function Oxygenases, Kidney Neoplasms, Repressor Proteins, Apoptosis, Cytoprotection, Cell Line, Tumor, Basic Helix-Loop-Helix Proteins, Basic Helix-Loop-Helix Transcription Factors, Von Hippel-Lindau Tumor Suppressor Protein, Hypoxia-Inducible Factor 1, alpha Subunit

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