Cited by 179Cancer Immunotherapy and BiomarkersCancer, Hypoxia, and MetabolismRenal cell carcinoma treatment

PD-L1 expression is regulated by hypoxia inducible factor in clear cell renal cell carcinoma

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Ruf, Melanie, Moch, Holger, Schraml, Peter·2016·International Journal of Cancer

Abstract

In our study, we demonstrate that ccRCC cell lines with impaired function of pVHL to degrade HIFα express elevated levels of PD‐L1. In vitro analysis provided evidence that both reconstitution of pVHL and silencing of HIF2α, but not of HIF1α, lead to reduced PD‐L1 expression. The strong correlation of expression between the HIF2α‐specific HIF target Glut1 and PD‐L1 confirmed this finding in ccRCC cell lines and tissue. Soluble PD‐L1 levels remained constant in the sera of ccRCC patients regardless of the PD‐L1 expression status in their tumors. In conclusion, our data suggest PD‐L1 as HIF2α target, which is upregulated in pVHL deficient ccRCC. The combination of PD‐L1 targeting drugs with HIF inhibiting agents may be an additional option for the treatment of ccRCC.

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  • The HIF-α dependency of PD-L1 is tumor-type dependent: PD-L1 expression is primarily HIF-1α driven in HIF-1α-dominant cancers (CT26 colon carcinoma and 4T1 breast carcinoma models) and HIF-2α-driven in HIF-2α-dominant cancers (ccRCC).

    “As seen for the other cancer axes, the HIF-α dependency of PD-L1 is tumor-type dependent, with PD-L1 expression primarily HIF-1α driven in HIF-1α-dominant cancers (such as CT26 colon carcinoma and 4T1 breast carcinoma models) and HIF-2α-driven in HIF-2α-dominant cancers (ccRCC) [81, 83].”

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Authors
Ruf, M., Moch, H., & Schraml, P.
Affiliations
University Hospital Zurich (CH)
Corresponding author
  • Ruf, Melanie
  • Schraml, Peter
Venue
International Journal of Cancer
Publisher
Wiley
Published
2016-03-25
Volume
139
Issue
2
Pages
396-403
ISSN
  • 0020-7136 (ISSN-L)
  • 1097-0215
OpenAlex
W2291094902
Cited by
179
References
38
Citations by year
2026: 4 · 2025: 6 · 2024: 13 · 2023: 18 · 2022: 20 · 2021: 28 · 2020: 27 · 2019: 24 · 2018: 24 · 2017: 11 · 2016: 4
FWCI
11.33
Type
journal article
Language
en
Open access
Locations
  • International Journal of Cancer (publishedVersion)
  • PubMed (publishedVersion)
  • Zurich Open Repository and Archive (University of Zurich) (acceptedVersion)
  • Zurich Open Repository and Archive (University of Zurich) (submittedVersion)
  • Zurich Open Repository and Archive (University of Zurich)
Funders
  • Swiss National Cancer Foundation (3238BO-10314)
  • Zurich Cancer League (to H.M.)
Topics
  • Health Sciences › Medicine › Oncology › Cancer Immunotherapy and Biomarkers
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Renal cell carcinoma treatment
Keywords
PD-L1, clear cell renal cell carcinoma, hypoxia-inducible factor, HIF-2α, HIF-1α, von Hippel-Lindau protein, VHL deficiency, HIF target genes, GLUT1, soluble PD-L1, HIF inhibitors, immune checkpoint inhibitors
MeSH terms
Carcinoma, Renal Cell, Humans, Immunohistochemistry, Kidney Neoplasms, Mutation, Gene Expression, Gene Expression Regulation, Neoplastic, Case-Control Studies, Gene Silencing, Cell Line, Tumor, Von Hippel-Lindau Tumor Suppressor Protein, Hypoxia-Inducible Factor 1, alpha Subunit, B7-H1 Antigen

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