Cited by 79Vitamin C and Antioxidants ResearchCancer, Hypoxia, and MetabolismCancer and biochemical research

Pharmacologic ascorbate induces neuroblastoma cell death by hydrogen peroxide mediated DNA damage and reduction in cancer cell glycolysis

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Ma, Enlong, Chen, Ping, Wilkins, Heather M., Wang, Tao, Swerdlow, Russell H., Chen, Qi·2017·Free Radical Biology and Medicine

Abstract

An ascorbate-mediated production of oxidative stress has been shown to retard tumor growth. Subsequent glycolysis inhibition has been suggested. Here, we further define the mechanisms relevant to this observation. Ascorbate was cytotoxic to human neuroblastoma cells through the production of H2O2, which led to ATP depletion, inhibited GAPDH, and non-apoptotic and non-autophagic cell death. The mechanism of cytotoxicity is different when PARP-dependent DNA repair machinery is active or inhibited. Ascorbate-generated H2O2 damaged DNA, activated PARP, depleted NAD+, and reduced glycolysis flux. NAD+ supplementation prevented ATP depletion and cell death, while treatment with a PARP inhibitor, olaparib, preserved NAD+ and ATP levels but led to increased DNA double-strand breakage and did not prevent ascorbate-induced cell death. These data indicate that in cells with an intact PARP-associated DNA repair system, ascorbate-induced cell death is caused by NAD+ and ATP depletion, while in the absence of PARP activation ascorbate-induced cell death still occurs but is a consequence of ROS-induced DNA damage. In a mouse xenograft model, intraperitoneal ascorbate inhibited neuroblastoma tumor growth and prolonged survival. Collectively, these data suggest that ascorbate could be effective in the treatment of glycolysis-dependent tumors. Also, in cancers that use alternative energy metabolism pathways, combining a PARP inhibitor with ascorbate treatment could be useful.

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Crossref · 10.1016/j.freeradbiomed.2017.09.008

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  • Pharmacological ascorbate may damage DNA in tumours in living animals.

    “This observation suggests that pharmacological ascorbate can cause DNA damage in in vivo tumours”

    From Targeting cancer vulnerabilities with high-dose vitamin C (2019) · cites this paper as [36]

  • In a xenograft model, daily intraperitoneal high-dose ascorbate (4 g kg−1) slowed neuroblastoma growth and raised tumour CHK2 and H2AX activity.

    “daily intraperitoneal injection with high-dose ascorbate (4 g kg−1) inhibited neuroblastoma growth in a xenograft model, and tumours had the increased activity of checkpoint kinase 2 (CHK2) and histone 2AX (H2AX).”

    From Targeting cancer vulnerabilities with high-dose vitamin C (2019) · cites this paper as [36]

  • Cancer cells need large amounts of readily available labile Fe2+ to survive and grow.

    “cancer cells have a high demand for easily accessible labile Fe2+ for their survival and growth.”

    From Targeting cancer vulnerabilities with high-dose vitamin C (2019) · cites this paper as [36]

  • That neuroblastoma study did not show an in vivo connection between ascorbate and H2O2 production.

    “although an in vivo link between ascorbate and the generation of H2O2 has not been demonstrated in this study36.”

    From Targeting cancer vulnerabilities with high-dose vitamin C (2019) · cites this paper as [36]

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Authors
Ma, E., Chen, P., Wilkins, H. M., Wang, T., Swerdlow, R. H., & Chen, Q.
Affiliations
  • Shenyang Pharmaceutical University (CN)
  • University of Kansas Medical Center (US)
Corresponding author
Chen, Qi
Venue
Free Radical Biology and Medicine
Publisher
Elsevier BV
Published
2017-12
Volume
113
Pages
36-47
ISSN
0891-5849 (ISSN-L)
OpenAlex
W2755332177
Cited by
79
References
59
Citations by year
2026: 8 · 2025: 6 · 2024: 9 · 2023: 5 · 2022: 10 · 2021: 8 · 2020: 13 · 2019: 12 · 2018: 6 · 2017: 2
FWCI
7.51
Type
journal article
Language
en
Open access
Locations
  • Free Radical Biology and Medicine (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • University of Kansas
  • P30 (AG035982)
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
vitamin C, neuroblastoma, hydrogen peroxide, oxidative stress, DNA damage, poly(ADP-ribose) polymerase, NAD+ depletion, ATP depletion, glycolysis inhibition, glyceraldehyde-3-phosphate dehydrogenase, non-apoptotic cell death, olaparib, PARP inhibitors, DNA double-strand breaks, tumor growth inhibition, cancer metabolism
MeSH terms
Animals, Ascorbic Acid, DNA, DNA Damage, DNA Repair, Humans, Hydrogen Peroxide, Neuroblastoma, Poly(ADP-ribose) Polymerases, Cell Death, Oxidative Stress, Xenograft Model Antitumor Assays, Mice

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