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- Title
Ascorbic acid does not reduce the anticancer effect of radiotherapy.
- Authors
YOICHIRO HOSOKAWA; RYO SAGA; SATORU MONZEN; SHINGO TERASHIMA; EICHI TSURUGA
- Abstract
The present study hypothesized that the therapeutic use of ascorbic acid (AsA) in combination with radiation may reduce therapy-related side effects and increase the antitumor effects. The aim of the study was to examine the association between the scavenged activity of AsA and the biological anticancer effect of hydroxyl (OH) radicals generated by X-ray irradiation. Cell survival, DNA fragmentation of human leukemia HL60 cells and the amount of OH radicals were investigated following X-ray irradiation and AsA treatment. The number of living cells decreased, and DNA fragmentation increased at AsA concentrations >1 mM. Electron spin resonance spectra revealed that X-ray irradiation generated OH radicals, which were scavenged by AsA at concentrations >75 μM. The AsA concentration inside the cell was 75 μM when cells underwent extracellular treatment with 5 mM AsA, which significantly induced HL60 cell death even without irradiation. No increase in the number of viable HL60 cells was observed following AsA treatment with irradiation when compared to irradiation alone. In conclusion, the disappearance of the radiation anticancer effects with AsA treatment in combination with radiotherapy for cancer treatment is not a cause for concern.
- Subjects
THERAPEUTIC use of vitamin C; ANTINEOPLASTIC agents; CANCER radiotherapy; DRUG side effects; LEUKEMIA treatment; ELECTRON paramagnetic resonance spectroscopy
- Publication
Biomedical Reports, 2017, Vol 6, Issue 1, p103
- ISSN
2049-9434
- Publication type
Article
- DOI
10.3892/br.2016.819