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Federico S. Rodríguez, Katterine A. Salazar, Nery A. Jara, María A García-Robles, Fernando Pérez, Luciano E. Ferrada, Fernando Martínez and Francisco J. Nualart Superoxide-dependent uptake of vitamin C in human glioma cells Journal of Neurochemistry 127

Article first published online: 19 AUG 2013 | DOI: 10.1111/jnc.12365

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This study strongly suggests that the Bystander effect, that is, glioma cell interaction with oxidant-producing microglia, could be an important mechanism for glioma vitamin C loading in the absence of functional sodium-vitamin C cotransporter 2 (SVCT2) expression. The high cellular vitamin C load in glioma cells results from a high uptake of extracellular dehydroascorbic acid (DHA) generated by neighboring microglia. This Bystander effect may explain the high antioxidative potential observed in high-grade gliomas, considering that high-grade gliomas may be the only neoplasm where oxidant-producing microglia can almost equal the number of tumor cells.

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