Ascorbate kills breast cancer cells by rewiring metabolism via redox imbalance and energy crisis
| Autor: | Ghanem, Ali, Melzer, Anna Maria, Zaal, Esther, Neises, Laura, Baltissen, Danny, Matar, Omar, Glennemeier-Marke, Hannah, Almouhanna, Fadi, Theobald, Jannick, Abu El Maaty, Mohamed A, Berkers, Celia, Wölfl, Stefan, Sub Biomol.Mass Spectrometry & Proteom., Veterinaire biochemie, dB&C FR-RMSC RMSC, Biomolecular Mass Spectrometry and Proteomics, Al het onderzoek van de faculteit Diergeneeskunde |
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| Přispěvatelé: | Sub Biomol.Mass Spectrometry & Proteom., Veterinaire biochemie, dB&C FR-RMSC RMSC, Biomolecular Mass Spectrometry and Proteomics, Al het onderzoek van de faculteit Diergeneeskunde |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0301 basic medicine
Cell Survival Breast Neoplasms Oxidative phosphorylation Ascorbic Acid Pentose phosphate pathway medicine.disease_cause Peroxide Biochemistry Redox 03 medical and health sciences 0302 clinical medicine Breast cancer Physiology (medical) medicine Animals Humans Glycolysis Ascorboic acid Vitamin C Reversing warburg effect Cancer Chemistry Warburg effect Cancer metabolism Oxidative burst Cell biology Citric acid cycle 030104 developmental biology Oxidative stress Female NAD+ kinase Metabolic rewiring Targetting cancer metabolism Energy Metabolism Oxidation-Reduction 030217 neurology & neurosurgery Intracellular |
| Zdroj: | Free Radical Biology and Medicine, 163, 196. Elsevier |
| ISSN: | 0891-5849 |
| Popis: | The idea to use megadoses of ascorbate (vitamin C) for cancer treatment has recently been revived. Despite clear efficacy in animal experimentation, our understanding of the cellular and molecular mechanisms of this treatment is still limited and suggests a combined oxidative and metabolic mechanism behind the selective cytotoxicity of ascorbate towards cancerous cells. To gain more insight into the cellular effects of high doses of ascorbate, we performed a detailed analysis of metabolic changes and cell survival of both luminal and basal-like breast cancer cells treated with ascorbate and revealed a distinctive metabolic shift virtually reversing the Warburg effect and triggering a severe disruption of redox homeostasis. High doses of ascorbate were cytotoxic against MCF7 and MDA-MB231 cells representing luminal and basal-like breast cancer phenotypes. Cell death was dependent on ascorbate-induced oxidative stress and accumulation of ROS, DNA damage, and depletion of essential intracellular co-factors including NAD+/NADH, associated with a multifaceted metabolic rewiring. This included a sharp disruption of glycolysis at the triose phosphate level, a rapid drop in ATP levels, and redirection of metabolites toward lipid droplet accumulation and increased metabolites and enzymatic activity in the pentose phosphate pathway (PPP). High doses of ascorbate also inhibited the TCA cycle and increased oxygen consumption. Together the severe disruptions of the intracellular metabolic homeostasis on multiple levels “redox crisis and energetic catastrophe” consequently trigger a rapid irreversible cell death. |
| Databáze: | OpenAIRE |
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