Cited by 66DNA Repair MechanismsCancer, Hypoxia, and MetabolismMetal complexes synthesis and properties

HIF1α regulated expression of XPA contributes to cisplatin resistance in lung cancer

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Liu, Yanbin, Bernauer, Amanda M., Yingling, Christin M., Belinsky, Steven A.·2012·Carcinogenesis

Abstract

Factors regulating nucleotide excision repair probably contribute to the heterogenous response of advanced stage lung cancer patients to drugs such as cisplatin. Studies to identify the genes in the nucleotide excision repair pathway most closely associated with resistance to cisplatin have not been conclusive. We hypothesized that Xeroderma pigmentosum complementation group A (XPA), because of its dual role in sensing and recruiting other DNA repair proteins to the damaged template, would be critical in defining sensitivity to cisplatin. Studies were conducted to identify factors regulating transcription of XPA, to assess its role in modulating sensitivity to cisplatin and its expression in primary lung tumors. Hypoxia-inducible factor 1 alpha (HIF1α) subunit was found to bind with strong affinity to a hypoxia response element sequence in the promoter of XPA. Modulating expression of HIF1α by small interfering RNA or cobalt chloride markedly reduced or increased transcription of XPA in lung cancer cell lines, respectively. Protein levels of XPA were strongly correlated with sensitivity to cisplatin (r = 0.88; P < 0.001) in cell lines and sensitivity could be increased by small interfering RNA depletion of XPA. Expression of XPA determined in 54 primary lung tumors was elevated on average 5.2-fold when compared with normal bronchial epithelial cells and correlated with levels of HIF1α (r = 0.58; P < 0.01). Together, these studies identify XPA as a novel target for regulation by HIF1α whose modulation could impact lung cancer therapy.

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Crossref · 10.1093/carcin/bgs142

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  • XPA may serve as a potential target for sensitization to cancer chemotherapy (e.g. cisplatin) via manipulation of available nuclear XPA, either at the transcriptional or post-transcriptional level.

    “XPA may serve as a potential target for sensitization to cancer chemotherapy (e.g. cisplatin) via manipulation of available nuclear XPA, either at the transcriptional or post-transcriptional level [53], [54], [55].”

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Authors
Liu, Y., Bernauer, A. M., Yingling, C. M., & Belinsky, S. A.
Affiliations
Lovelace Respiratory Research Institute (US)
Corresponding author
Belinsky, Steven A.
Venue
Carcinogenesis
Published
2012-03-31
Volume
33
Issue
6
Pages
1187-1192
ISSN
  • 0143-3334 (ISSN-L)
  • 1460-2180
OpenAlex
W2148990963
Cited by
65
References
44
Citations by year
2026: 2 · 2025: 6 · 2024: 1 · 2023: 1 · 2022: 3 · 2021: 4 · 2020: 7 · 2019: 6 · 2018: 4 · 2017: 8 · 2016: 5 · 2015: 4 · 2014: 4 · 2013: 8 · 2012: 2
FWCI
2.31
Type
journal article
Language
en
Open access
Locations
  • Carcinogenesis (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute of Environmental Health Sciences (R01ES015262)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
  • Health Sciences › Medicine › Oncology › Metal complexes synthesis and properties
Keywords
XPA, HIF-1α, cisplatin resistance, lung cancer, nucleotide excision repair, hypoxia response element, transcriptional regulation, cobalt chloride, siRNA, primary lung tumor
MeSH terms
Adenocarcinoma of Lung, Adenocarcinoma, Antineoplastic Agents, Cisplatin, Cobalt, DNA Repair, DNA-Binding Proteins, Humans, Lung Neoplasms, Transcription, Genetic, Gene Expression Regulation, Neoplastic, Drug Resistance, Neoplasm, RNA Interference, RNA, Small Interfering, Cell Line, Tumor, Xeroderma Pigmentosum Group A Protein, Hypoxia-Inducible Factor 1, alpha Subunit

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