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The Effect of Low and Medium Doses of Proton Pencil Scanning Beam on the Blood-Forming Organs during Total Irradiation of Mice

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The aim of this work was to study the effect of proton pencil beam scanning in the Bragg peak in the dose range of 0.1–1.5 Gy on the induction of cytogenetic damage in the bone marrow, reactive oxygen species (ROS) production in whole blood, and the state of lymphoid organs after total body irradiation of mice. Irradiation was carried out in the Prometeus proton synchrotron (Protvino) in the Bragg peak with proton energy at the output of 90–116 MeV. It was found that, under irradiation of mice in the range of low and medium doses of proton pencil beam scanning in the Bragg peak, the relative biological effectiveness (RBE) according to the criterion of cytogenetic changes was 1.15. In addition, it was found that the pathophysiological effect on the lymphoid organs and the production of ROS by blood cells were different as compared with the effect of X-rays.

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The effect of low and medium doses of protons on the hematopoietic organs during total irradiation of mice was studied using pencil proton beam scanning technology at the Physical Technical Center of Lebedev Physical Institute and at the Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, within the framework of basic research under state assignment topics and with partial support by the R&D agreement no. 01/19 between the Physical Technical Center of Lebedev Physical Institute and the Institute of Theoretical and Experimental Biophysics of the Russian Academy of Sciences.

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Correspondence to O. M. Rozanova or T. A. Belyakova.

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Conflict of interest. The authors declare that they have no conflict of interest.

Statement on the welfare of animals. All manipulations with mice were performed in accordance with the regulatory legal acts on the experimental work with animals [6], and the experimental plan was approved by the Commission on Biological Safety and Bioethics of the Institute of Theoretical and Experimental Biophysics (Protocol no. 4 from April 5, 2018).

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Translated by M. Batrukova

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Balakin, V.E., Rozanova, O.M., Smirnova, E.N. et al. The Effect of Low and Medium Doses of Proton Pencil Scanning Beam on the Blood-Forming Organs during Total Irradiation of Mice. Dokl Biochem Biophys 494, 231–234 (2020).

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