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Our graphical review expands the analysis of cancer vulnerabilities for high dose vitamin C, based on several facts, illustrating the cytotoxic potential of the ascorbate free radical (AFR) via impairment of mitochondrial respiration and the mechanisms of its elimination in mammals by the membrane-bound NADH:cytochrome b5 oxidoreductase 3 (Cyb5R3). We propose that vitamin C can function in "protective mode" or "destructive mode" affecting cellular homeostasis, depending on the intracellular "steady-state" concentration of AFR and differential expression/activity of Cyb5R3 in cancerous and normal cells. Thus, a specific anti-cancer effect can be achieved at high doses of vitamin C therapy. The review is intended for a wide audience of readers - from students to specialists in the field. Copyright © 2019 The Authors. Published by Elsevier B.V. All rights reserved.

Citation

Rumiana Bakalova, Zhivko Zhelev, Thomas Miller, Ichio Aoki, Tatsuya Higashi. New potential biomarker for stratification of patients for pharmacological vitamin C in adjuvant settings of cancer therapy. Redox biology. 2020 Jan;28:101357

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PMID: 31678721

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