Guided treatments with nanoparticles and low doses of radiation are a new approach in cancer therapy. This study evaluated the ability of Chitosan-Gallium nanoparticles (Ch.GaNPs) and low dose ofγ-radiation to suppressoxidative stressof female mice bearing solid Ehrlich carcinoma (EC)in the neck region. Begins from 7 th day of EC cells inoculation Ch.GaNPs(0.5 mg/kg body weight) were orally administered via gavages for a period of 15 consecutive days and Whole-body γ -irradiation was carried out at a single dose of 0.25Gy/twice a week for 2 weeks. Tumor size was monitored. Oxidative stress markers were assessed, histopathological changes in tumor and liver tissues were studied. In addition, the angiogenic markers concentrations were evaluated.Treatment of EC-bearing mice with Ch.GaNPs and/or low doseof γ -radiation exposure significantly reduced tumor volume, increased lipid peroxidation and decreased glutathione content as well as glutathione peroxidase activity intumor and liver tissues. Moreover, the dual treatment significantly reducedserumVEGF, PDGF and TNF-α levels, and significantly elevated Cas-3 activity. These results were well appreciated with the histopathologicalfindings in the tumor and liver tissue. In conclusion, the combined treatment of Ch.GaNPs and low dose ofγ-radiation have a role in suppressing oxidative stress of female mice bearing solid Ehrlich carcinoma .
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