Cited by 443Vitamin C and Antioxidants ResearchCancer, Hypoxia, and MetabolismCancer and biochemical research

O2⋅− and H2O2-Mediated Disruption of Fe Metabolism Causes the Differential Susceptibility of NSCLC and GBM Cancer Cells to Pharmacological Ascorbate

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Schoenfeld, Joshua D., Sibenaller, Zita A., Mapuskar, Kranti A., Wagner, Brett A., Cramer-Morales, Kimberly L., Furqan, Muhammad, Sandhu, Sonia, Carlisle, Thomas L. +27 more·2017·Cancer Cell

Abstract

Pharmacological ascorbate has been proposed as a potential anti-cancer agent when combined with radiation and chemotherapy. The anti-cancer effects of ascorbate are hypothesized to involve the autoxidation of ascorbate leading to increased steady-state levels of H 2 O 2; however, the mechanism(s) for cancer cell-selective toxicity remain unknown. The current study shows that alterations in cancer cell mitochondrial oxidative metabolism resulting in increased levels of O 2⋅- and H 2 O 2 are capable of disrupting intracellular iron metabolism, thereby selectively sensitizing non-small-cell lung cancer (NSCLC) and glioblastoma (GBM) cells to ascorbate through pro-oxidant chemistry involving redox-active labile iron and H 2 O 2. In addition, preclinical studies and clinical trials demonstrate the feasibility, selective toxicity, tolerability, and potential efficacy of pharmacological ascorbate in GBM and NSCLC therapy.

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Crossref · 10.1016/j.ccell.2017.02.018

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  • In lung and glioblastoma cancer cells, higher mitochondrial ROS raised intracellular labile iron by increasing transferrin receptor, making the cells more sensitive to ascorbate.

    “an increased level of mitochondrial ROS in lung and glioblastoma cancer cells led to increased levels of intracellular labile iron through the upregulation of the Tf receptor (TfR), thus increasing the sensitivity of these cancer cells to ascorbate43.”

    From Targeting cancer vulnerabilities with high-dose vitamin C (2019) · cites this paper as [43]

  • Giving ascorbate by injection does not block the effects of chemotherapy or radiotherapy.

    “Numerous preclinical and clinical studies indicate that parenteral injection of pharmacological ascorbate does not interfere with chemotherapy or radiotherapy and may even act synergistically43,104,105.”

    From Targeting cancer vulnerabilities with high-dose vitamin C (2019) · cites this paper as [43]

  • Giving ascorbate by injection may act synergistically with chemotherapy or radiotherapy.

    “Numerous preclinical and clinical studies indicate that parenteral injection of pharmacological ascorbate does not interfere with chemotherapy or radiotherapy and may even act synergistically43,104,105.”

    From Targeting cancer vulnerabilities with high-dose vitamin C (2019) · cites this paper as [43]

  • In non-small-cell lung cancer and glioblastoma cells, pharmacological ascorbate selectively sensitizes the cells by generating redox-active labile iron and hydrogen peroxide, as shown in in vitro cell lines and mouse models.

    “This study shows that pharmacological ascorbate selectively sensitizes non-small-cell lung cancer (NSCLC) and glioblastoma (GBM) cells by generating redox-active labile iron and H2O2 using in vitro cell lines and mouse models.”

    From Targeting cancer vulnerabilities with high-dose vitamin C (2019) · cites this paper as [43]

  • Ascorbate therapy combined with other chemotherapies has potential efficacy in patients with glioblastoma and non-small-cell lung cancer.

    “In addition, it shows the potential efficacy of ascorbate therapy combined with other chemotherapies in patients with GBM and NSCLC.”

    From Targeting cancer vulnerabilities with high-dose vitamin C (2019) · cites this paper as [43]

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Research works printed but not linked: 1

  1. Stupp R Mason WP van den Bent MJ Weller M Fisher B Taphoorn MJB Belanger K Brandes AA Marosi C Bogdahn U 2005b Radiotherapy plus concomitant and adjuvant temozolomide for glioblastoma N Engl J Med 352 987 996 15758009

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Authors
Schoenfeld, J. D., Sibenaller, Z. A., Mapuskar, K. A., Wagner, B. A., Cramer-Morales, K. L., Furqan, M., Sandhu, S., Carlisle, T. L., Smith, M. C., Abu Hejleh, T., Berg, D. J., Zhang, J., Keech, J., Parekh, K. R., Bhatia, S., Monga, V., Bodeker, K. L., Ahmann, L., Vollstedt, S., Brown, H., Shanahan Kauffman, E. P., Schall, M. E., Hohl, R. J., Clamon, G. H., Greenlee, J. D., Howard, M. A., Schultz, M. K., Smith, B. J., Riley, D. P., Domann, F. E., Cullen, J. J., Buettner, G. R., Buatti, J. M., Spitz, D. R., & Allen, B. G.
Affiliations
  • University of Iowa (US)
  • Galera Therapeutics, Inc. (United States) (US)
Corresponding author
  • Spitz, Douglas R.
  • Allen, Bryan G.
Venue
Cancer Cell
Publisher
Elsevier BV
Published
2017-04
Volume
31
Issue
4
Pages
487-500.e8
ISSN
1535-6108 (ISSN-L)
OpenAlex
W2597494578
Cited by
443
References
74
Citations by year
2026: 27 · 2025: 34 · 2024: 44 · 2023: 52 · 2022: 59 · 2021: 56 · 2020: 61 · 2019: 45 · 2018: 45 · 2017: 20
FWCI
38.88
Type
journal article
Language
en
Update notices
erratum (2017-08-14)
Open access
Locations
  • Cancer Cell (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • American Society for Radiation Oncology (JF2014-1)
  • Carver Research Program of Excellence in Redox Biology
  • US NIH (R01-CA182804, R01-CA184051, R01-CA169046, U01-CA166800)
  • IBM
  • CCSG (P30-CA086862)
  • University of Iowa Medical Scientist Training Program (T32-GM007337, T32-CA078586)
  • Galera Therapeutics
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Vitamin C and Antioxidants Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cancer and biochemical research
Keywords
pharmacological ascorbate, reactive oxygen species, superoxide, hydrogen peroxide, mitochondrial oxidative metabolism, non-small cell lung cancer, glioblastoma
MeSH terms
Animals, Antineoplastic Combined Chemotherapy Protocols, Ascorbic Acid, Brain Neoplasms, Carcinoma, Non-Small-Cell Lung, Female, Glioblastoma, Humans, Hydrogen Peroxide, Iron, Lung Neoplasms, Male, Mice, Nude, Oxygen, Radiation-Sensitizing Agents, Xenograft Model Antitumor Assays, Cell Line, Tumor, Chemoradiotherapy

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