Abstract
The data of the study of the radioprotective properties of nanocerium (nCeO2) after total irradiation of mice with carbon ions in medium and lethal doses according to the micronucleus test and the criterion of 30-day survival are presented. A significant protective effect of nCeO2 upon irradiation at medium doses was observed at per os administration for 5 days before irradiation (that is, at long-term prophylactic use). Mouse survival data showed no protective effect of per os administration of nCeO2 in contrast to the micronucleus test results. After injections of both nCeO2 and saline solution 24 h before or immediately after irradiation, the radioprotective effect was detected using both methods. The data obtained revealed the dependence of the observed effects on the mode and time of nCeO2 administration, the influence of the solvent, the level of doses and the quality of radiation, as well as demonstrated the possibility of using nanocerium preparations to protect organisms from radiation with high LET values and the importance of further studies of the radioprotective properties of new nanomaterials.
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ACKNOWLEDGMENTS
We express our sincere gratitude to A.L. Popov, Head of the Laboratory of Cell and Tissue Growth, Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, for providing the nanocrystalline cerium oxide sample and interest in our research.
Funding
The study of the radioprotective effect of nanocerium upon irradiation of mice with medium and lethal doses of carbon ions was performed as part of fundamental scientific research on topics that correspond to the state assignment no. 075-00381-21-00 (Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences). The study was also supported in part by the R&D agreement with the Physical-Technical Center, Lebedev Physical Institute, no. 07/21.
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Statement on the welfare of animals. All applicable international, national and institutional guidelines for the care and use of animals in the performance of work have been observed. The studies were carried out in accordance with the requirements of the Federation of European Scientific Associations for the maintenance and use of laboratory animals in scientific research (Federation of European Laboratory Animal Science Association, FELASA),and the experimental plan was approved by the Commission on Biological Safety and Bioethics of the Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences (protocol no. 26/2021 dated February 9, 2021).
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Balakin, V.E., Rozanova, O.M., Smirnova, E.N. et al. Radioprotective Effect of Nanocerium by Irradiation of Mice with Carbon Ions in Medium and Lethal Doses. Dokl Biochem Biophys 507, 283–288 (2022). https://doi.org/10.1134/S1607672922060023
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DOI: https://doi.org/10.1134/S1607672922060023