Ketogenic diets combined with fractionated radiation treatment results in decreased immunoreactive PCNA in tumor tissue. Ketogenic diets combined with.

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Ketogenic diets combined with fractionated radiation treatment results in decreased immunoreactive PCNA in tumor tissue. Ketogenic diets combined with fractionated radiation treatment results in decreased immunoreactive PCNA in tumor tissue. Mouse xenograft tumors treated as in Fig. 2 were harvested 24 hours after the final 2 Gy radiation fraction. Tumor protein homogenates harvested from control, ketogenic diet, ionizing radiation, and ketogenic diet + ionizing radiation-treated animals (3 from each group) were separated on denaturing gels, blotted onto membranes, and stained with anti-PCNA or anti-γH2AX antibodies (A). Quantification of dot blots was done by ImageJ analysis and samples were normalized to the background on each blot. Animals treated with ketogenic diet + ionizing radiation had a significant reduction in PCNA staining, relative to ionizing radiation animals (B). There was not a significant difference in γH2AX staining when ionizing radiation and ketogenic diet + ionizing radiation were compared, suggesting that ketogenic diets do not increase DNA damage when combined with radiation (C). Error bars represent ± 1SEM. One way ANOVA with Newman–Keuls Multiple Comparison Test were used to determine which groups were significantly different from control (*, P < 0.05). Bryan G. Allen et al. Clin Cancer Res 2013;19:3905-3913 ©2013 by American Association for Cancer Research