JOURNAL DESCRIPTION
The Medical Radiology and Radiation Safety journal ISSN 1024-6177 was founded in January 1956 (before December 30, 1993 it was entitled Medical Radiology, ISSN 0025-8334). In 2018, the journal received Online ISSN: 2618-9615 and was registered as an electronic online publication in Roskomnadzor on March 29, 2018. It publishes original research articles which cover questions of radiobiology, radiation medicine, radiation safety, radiation therapy, nuclear medicine and scientific reviews. In general the journal has more than 30 headings and it is of interest for specialists working in thefields of medicine¸ radiation biology, epidemiology, medical physics and technology. Since July 01, 2008 the journal has been published by State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency. The founder from 1956 to the present time is the Ministry of Health of the Russian Federation, and from 2008 to the present time is the Federal Medical Biological Agency.
Members of the editorial board are scientists specializing in the field of radiation biology and medicine, radiation protection, radiation epidemiology, radiation oncology, radiation diagnostics and therapy, nuclear medicine and medical physics. The editorial board consists of academicians (members of the Russian Academy of Science (RAS)), the full member of Academy of Medical Sciences of the Republic of Armenia, corresponding members of the RAS, Doctors of Medicine, professor, candidates and doctors of biological, physical mathematics and engineering sciences. The editorial board is constantly replenished by experts who work in the CIS and foreign countries.
Six issues of the journal are published per year, the volume is 13.5 conventional printed sheets, 88 printer’s sheets, 1.000 copies. The journal has an identical full-text electronic version, which, simultaneously with the printed version and color drawings, is posted on the sites of the Scientific Electronic Library (SEL) and the journal's website. The journal is distributed through the Rospechat Agency under the contract № 7407 of June 16, 2006, through individual buyers and commercial structures. The publication of articles is free.
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The two-year impact factor of RISC, according to data for 2017, was 0.439, taking into account citation from all sources - 0.570, and the five-year impact factor of RISC - 0.352.
Medical Radiology and Radiation Safety. 2023. Vol. 68. № 5
DOI:10.33266/1024-6177-2023-68-5-11-18
E.Yu. Moskaleva1, O.V. Vysotskaya1, E.S. Zhorova2, D.A. Shaposhnikova1,
V.P. Saprykin3, I.V. Cheshigin1, O.D. Smirnova1, A.S. Zhirnik1
Late Effects of γ, n-Irradiation of Mice: Shortening of Telomeres and Tumors Development
1 National Research Center “Kurchatov Institute”, Moscow, Russia
2 A.I. Burnazyan Federal Medical Biophysical Center, Moscow, Russia
3 Moscow Institute of Physics and Technology, Dolgoprudny, Russia
Contact person: E.Yu. Moskaleva, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. , This email address is being protected from spambots. You need JavaScript enabled to view it.
ABSTRACT
Purpose: To investigate the telomere length (TL) of bone marrow and thymus cells as a marker of replicative aging late after the prolonged γ, n-irradiation of mice at low and moderate doses and analysis of the appearance of tumors by the end of the experiment − after
14 months.
Material and methods: C57Bl/6 and CBA mice were irradiated at doses of 10–500 mGy at the OR-M facility using Pu-Be radionuclide sources at a total absorbed dose rate of neutrons and gamma rays of 2.13 mGy/h, 75 % of which – 1.57 mGy/h – accounted for neutrons with an average energy of 3.5 MeV. Absolute TL in bone marrow and thymus cells was determined using real-time PCR 2 months and 1 year
2 months after irradiation, and the mean TL was calculated. Tumors found during the mice organs examination after autopsy were subjected to histological examination.
Results: It was shown that the TL in bone marrow and thymus cells of control CВA mice was 2 times higher than the TL observed in C57Bl/6 mice. Prolonged γ, n-irradiation of C57Bl/6 mice led to a dose-dependent decrease in TL in bone marrow cells 14 months after exposure, which was statistically significant at doses of 100 and 500 mGy. A decreased TL in the thymus was found only at a dose of 500 mGy. During this period, TL in bone marrow cells of CBA mice was reduced in dose-independent manner, starting from as low as 10 mGy, but no statistically significant decrease in TL was found in the thymus. The results obtained indicate the acceleration of replicative senescence of bone marrow cells in mice in the long term period after γ,n-irradiation already at low doses, and in thymus cells only at a dose of 500 mGy. Twenty-four hours after irradiation at doses of 100 and 500 mGy the number of leukocytes in mice of both lines was reduced, which was recovered in C57Bl/6 mice after a week, and in CBA mice – after two weeks. In 14 months after γ, n-irradiation, the appearance of tumors was found in mice of both studied lines: in CBA mice, lung adenocarcinoma at a dose of 50 mGy (in 1 out of 10) and uterine carcinosarcoma at a dose of 500 mGy (in 1 out of 10); in C57Bl/6 mice, keratinizing squamous cell carcinoma of the uterus at a dose of 500 mGy (2 out of 10) was seen in the absence of tumors in control mice. Histological examination of the liver of CBA mice after γ, n-irradiation at a dose of 500 mGy revealed deep dystrophic changes, the causes of which are not clear.
Conclusion: The results obtained indicate a high biological hazard of prolonged γ, n-irradiation at doses above 10 mGy, since after irradiation at this dose, an acceleration of replicative senescence of bone marrow cells in the long-term period was found, and the possibility of tumor formation increases after irradiation at a dose of 50 mGy and higher.
Keywords: γ, n-irradiation, telomere length, bone marrow, thymus, late effects, prolonged exposure, neutrons, low doses, mice
For citation: Moskaleva EYu, Vysotskaya OV, Zhorova ES, Shaposhnikova DA, Saprykin VP, Cheshigin IV, Smirnova OD, Zhirnik AS. Late Effects of γ, n-Irradiation of Mice: Shortening of Telomeres and Tumors Development. Medical Radiology and Radiation Safety. 2023;68(5):11–18.
(In Russian). DOI:10.33266/1024-6177-2023-68-5-11-18
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PDF (RUS) Full-text article (in Russian)
Conflict of interest. The authors declare no conflict of interest.
Financing. SIC «Kurchatov Institute».
Contribution. Article was prepared with equal participation of the authors.
Article received: 20.04.2023. Accepted for publication: 27.05.2023.