1
|
Blokhina TM, Ivanov AA, Vorobyeva NY, Yashkina EI, Nikitenko OV, Bychkova TM, Molokanov AG, Timoshenko GN, Bushmanov AY, Samoilov AS, Osipov AN. DNA Damage in Splenocytes of Mice Exposed to Secondary Radiation Created by 650 MeV Protons Bombarding a Concrete Shielding Barrier. Bull Exp Biol Med 2022; 174:194-198. [PMID: 36600036 DOI: 10.1007/s10517-023-05672-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Indexed: 01/06/2023]
Abstract
The proportion of splenocytes with a high level of DNA double-strand breaks was determined in mice exposed to primary and secondary radiation created by bombarding of a concrete barrier (thickness 20, 40, and 80 cm) by 650 MeV protons. The proportion of splenocytes with a high level of DNA double-strand breaks was assessed by flow cytometric analysis of γH2AX+ and TUNEL+ cells. It is shown that concrete barrier can significantly reduce primary proton radiation; the severity of negative biological effects in mice irradiated in the center of the proton beam decreased with increasing the thickness of this barrier. However, the spectrum of secondary radiation changes significantly with increasing the barrier thickness from 20 to 80 cm and the distance from central axis of the beam from 0 to 20 cm, and the proportion of the neutron component increases, which also causes negative biological effects manifesting in a significant (p<0.05) increase in the percentage of splenocytes with a high level of DNA damage in mice irradiated at a distance of 20 cm from the center of the proton beam and receiving relatively low doses (0.10-0.17 Gy).
Collapse
Affiliation(s)
- T M Blokhina
- A. I. Burnasyan Federal Medical Biophysical Center, Federal Medical-Biological Agency of Russia, Moscow, Russia.,N. N. Se-menov Federal Research Center of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
| | - A A Ivanov
- A. I. Burnasyan Federal Medical Biophysical Center, Federal Medical-Biological Agency of Russia, Moscow, Russia.,Institute of Biomedical Problems, State Research Center, Russian Academy of Sciences, Moscow, Russia.,United Institute of Nuclear Research, Dubna, Russia
| | - N Yu Vorobyeva
- A. I. Burnasyan Federal Medical Biophysical Center, Federal Medical-Biological Agency of Russia, Moscow, Russia.,N. N. Se-menov Federal Research Center of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
| | - E I Yashkina
- A. I. Burnasyan Federal Medical Biophysical Center, Federal Medical-Biological Agency of Russia, Moscow, Russia.,N. N. Se-menov Federal Research Center of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
| | - O V Nikitenko
- A. I. Burnasyan Federal Medical Biophysical Center, Federal Medical-Biological Agency of Russia, Moscow, Russia.,Institute of Biomedical Problems, State Research Center, Russian Academy of Sciences, Moscow, Russia
| | - T M Bychkova
- A. I. Burnasyan Federal Medical Biophysical Center, Federal Medical-Biological Agency of Russia, Moscow, Russia.,Institute of Biomedical Problems, State Research Center, Russian Academy of Sciences, Moscow, Russia
| | | | | | - A Yu Bushmanov
- A. I. Burnasyan Federal Medical Biophysical Center, Federal Medical-Biological Agency of Russia, Moscow, Russia
| | - A S Samoilov
- A. I. Burnasyan Federal Medical Biophysical Center, Federal Medical-Biological Agency of Russia, Moscow, Russia
| | - A N Osipov
- A. I. Burnasyan Federal Medical Biophysical Center, Federal Medical-Biological Agency of Russia, Moscow, Russia. .,N. N. Se-menov Federal Research Center of Chemical Physics, Russian Academy of Sciences, Moscow, Russia.
| |
Collapse
|
2
|
Zaharieva E, Sasatani M, Matsumoto R, Kamiya K. Formation of DNA Damage Foci in Human and Mouse Primary Fibroblasts Chronically Exposed to Gamma Radiation at 0.1 mGy/min. Radiat Res 2021; 196:40-54. [PMID: 33857310 DOI: 10.1667/rade-20-00059.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Accepted: 03/11/2021] [Indexed: 11/03/2022]
Abstract
Low-dose-rate radiation exposures and their associated cancer risk are an important concern for radiation protection today. Nevertheless, there is almost no data concerning DNA damage at dose rates below 0.1 mGy/min. In this study, we investigated the formation of DNA damage repair foci under chronic low-dose-rate irradiation relative to acute high-dose-rate irradiation and assessed the magnitude of the dose-rate effect. Four human and four mouse normal fibroblast cell models from different organs were subjected to gamma irradiation at 0.096 mGy/min or 0.81 Gy/min, and dose-response curves were established for the dose range from 0.1 to 0.8 Gy. The results indicate that prolonged low-dose-rate exposures cause modestly increased levels of DNA repair foci, with a strongly supralinear dose-response relationship, where 40-70% of the radiation effect at 1 Gy was already present at the total dose of 0.1 Gy. Thus, compared to acute irradiation, low-dose-rate exposure was 6-9 times less efficient at a total dose of 0.1 Gy, and 10-20 times less efficient at 1 Gy. Comparison between cell models revealed a certain correlation between the presence of persistent, above-background foci at 48 h after irradiation and the sensitivity to low-dose-rate radiation, suggesting that repair capacity plays an important role in the cellular response to chronic irradiation. Given the findings reported here, we propose that establishing detailed dose-response curves and accounting for the repair rates of different cell models are essential steps in elucidating dose-rate effects.
Collapse
Affiliation(s)
- Elena Zaharieva
- Department of Experimental Oncology, Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan
| | - Megumi Sasatani
- Department of Experimental Oncology, Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan
| | - Ryoga Matsumoto
- Graduate School of Medicine, Hiroshima University, Hiroshima, Japan
| | - Kenji Kamiya
- Department of Experimental Oncology, Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan
| |
Collapse
|
3
|
Zorin V, Grekhova A, Pustovalova M, Zorina A, Smetanina N, Vorobyeva N, Kopnin P, Gilmutdinova I, Moskalev A, Osipov AN, Leonov S. Spontaneous γH2AX foci in human dermal fibroblasts in relation to proliferation activity and aging. Aging (Albany NY) 2020; 11:4536-4546. [PMID: 31289256 PMCID: PMC6660037 DOI: 10.18632/aging.102067] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Accepted: 06/26/2019] [Indexed: 12/12/2022]
Abstract
We assessed the effects of donor age on clonogenicity, proliferative potential, and spontaneous γH2AX foci in the proliferating (Ki67 +) and senescent (SA β-gal +) cultures of skin fibroblasts isolated from 34 donors of different age (23-82 years). Here, we demonstrated that neither the colony forming effectiveness of proliferating (Ki67+) fraction of the fibroblasts nor the average number of γH2AX foci of the same fraction does not depend on the age of the donor. The correlation between the number of γH2AX foci and the donor's age was reliable in quiescent (Ki67-) cells. The average number of γH2AX foci in quiescent fibroblasts of donors older than 68 years was about two times higher than in the same cells of up to 30 years old donors. The number of γH2AX foci demonstrated a statistically significant positive correlation with the fraction of proliferating cells in fibroblast cultures. On average, proliferating cells have twice as many the γH2AX foci in comparison with the quiescent cells. Within a population of proliferating (Ki67+) cells, the degree of senescence correlated with a relative declining of constitutive γH2AX foci number, whereas in the population of quiescent (Ki67-) cells, it was proportional to augmenting the number of the γH2AX foci. Our data on a statistically significant (p=0.001) correlation between the age of the donor and the number of constitutive γH2AX foci in quiescent cells, could point out the ongoing DNA-damage response due in the maintenance of the senescent state of cells.
Collapse
Affiliation(s)
- Vadim Zorin
- Human Stem Cells Institute, Moscow 119333, Russia
| | - Anna Grekhova
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow 123098, Russia.,Emanuel Institute for Biochemical Physics, Russian Academy of Sciences, Moscow 119991, Russia
| | - Margarita Pustovalova
- Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region 141700, Russia
| | - Alla Zorina
- Human Stem Cells Institute, Moscow 119333, Russia
| | - Nadezhda Smetanina
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow 123098, Russia
| | - Natalia Vorobyeva
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow 123098, Russia.,Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow 119991, Russia
| | - Pavel Kopnin
- N.N. Blokhin National Medical Research Oncology Center, Ministry of Health of Russia, Moscow 115478, Russia
| | - Ilmira Gilmutdinova
- FSBI "National Medical Research Center for Rehabilitation and Balneology", Ministry of Health of Russia, Moscow 121099, Russia
| | - Alexey Moskalev
- Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region 141700, Russia.,Laboratory of Molecular Radiobiology and Gerontology, Institute of Biology of Komi Science Center of Ural Division of Russian Academy of Sciences, Syktyvkar, Russia.,Laboratory of Post-Genomic Research, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
| | - Andreyan N Osipov
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow 123098, Russia.,Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region 141700, Russia.,Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow 119991, Russia
| | - Sergey Leonov
- Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region 141700, Russia.,Institute of Cell Biophysics, Russian Academy of Sciences, Pushchino, Moscow Region 142290, Russia
| |
Collapse
|
4
|
Grekhova AK, Pustovalova MV, Eremin PS, Ozerov IV, Maksimova OA, Gordeev AV, Vorobyeva NY, Osipov AN. Evaluation of the Contribution of Homologous Recombination in DNA Double-Strand Break Repair in Human Fibroblasts after Exposure to Low and Intermediate Doses of X-ray Radiation. BIOL BULL+ 2020. [DOI: 10.1134/s1062359019110037] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
5
|
The Impact of Dose Rate on DNA Double-Strand Break Formation and Repair in Human Lymphocytes Exposed to Fast Neutron Irradiation. Int J Mol Sci 2019; 20:ijms20215350. [PMID: 31661782 PMCID: PMC6862539 DOI: 10.3390/ijms20215350] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 10/16/2019] [Accepted: 10/19/2019] [Indexed: 12/12/2022] Open
Abstract
The lack of information on how biological systems respond to low-dose and low dose-rate exposures makes it difficult to accurately assess the carcinogenic risks. This is of critical importance to space radiation, which remains a serious concern for long-term manned space exploration. In this study, the γ-H2AX foci assay was used to follow DNA double-strand break (DSB) induction and repair following exposure to neutron irradiation, which is produced as secondary radiation in the space environment. Human lymphocytes were exposed to high dose-rate (HDR: 0.400 Gy/min) and low dose-rate (LDR: 0.015 Gy/min) p(66)/Be(40) neutrons. DNA DSB induction was investigated 30 min post exposure to neutron doses ranging from 0.125 to 2 Gy. Repair kinetics was studied at different time points after a 1 Gy neutron dose. Our results indicated that γ-H2AX foci formation was 40% higher at HDR exposure compared to LDR exposure. The maximum γ-H2AX foci levels decreased gradually to 1.65 ± 0.64 foci/cell (LDR) and 1.29 ± 0.45 (HDR) at 24 h postirradiation, remaining significantly higher than background levels. This illustrates a significant effect of dose rate on neutron-induced DNA damage. While no significant difference was observed in residual DNA damage after 24 h, the DSB repair half-life of LDR exposure was slower than that of HDR exposure. The results give a first indication that the dose rate should be taken into account for cancer risk estimations related to neutrons.
Collapse
|
6
|
Ulyanenko S, Pustovalova M, Koryakin S, Beketov E, Lychagin A, Ulyanenko L, Kaprin A, Grekhova A, M Ozerova A, V Ozerov I, Vorobyeva N, Shegay P, Ivanov S, Leonov S, Klokov D, Osipov AN. Formation of γH2AX and pATM Foci in Human Mesenchymal Stem Cells Exposed to Low Dose-Rate Gamma-Radiation. Int J Mol Sci 2019; 20:E2645. [PMID: 31146367 PMCID: PMC6600277 DOI: 10.3390/ijms20112645] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 05/21/2019] [Accepted: 05/23/2019] [Indexed: 12/12/2022] Open
Abstract
DNA double-strand breaks (DSB) are among the most harmful DNA lesions induced by ionizing radiation (IR). Although the induction and repair of radiation-induced DSB is well studied for acute irradiation, responses to DSB produced by chronic IR exposures are poorly understood, especially in human stem cells. The aim of this study was to examine the formation of DSB markers (γH2AX and phosphorylated kinase ATM, pATM, foci) in human mesenchymal stem cells (MSCs) exposed to chronic gamma-radiation (0.1 mGy/min) in comparison with acute irradiation (30 mGy/min) at cumulative doses of 30, 100, 160, 240 and 300 mGy. A linear dose-dependent increase in the number of both γH2AX and pATM foci, as well as co-localized γH2AX/pATM foci ("true" DSB), were observed after an acute radiation exposure. In contrast, the response of MSCs to a chronic low dose-rate IR exposure deviated from linearity towards a threshold model, for γH2AX, pATM foci and γH2AX/pATM foci, with an indication of a "plateau". The state of equilibrium between newly formed DSB at a low rate during the protracted exposure time and the elimination of a fraction of DSB is proposed as a mechanistic explanation of the non-linear DSB responses following a low dose-rate irradiation. This notion is supported by the observation of the elimination of a substantial fraction of DSB 6 h after the cessation of the exposures. Our results demonstrate non-linear dose responses for γH2AX and pATM foci in human MSCs exposed to low dose-rate IR and showed the existence of a threshold, which may have implications for radiation protection in humans.
Collapse
Affiliation(s)
- Stepan Ulyanenko
- A. Tsyb Medical Radiological Research Centre-Branch of the National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation, Koroleva 4, Obninsk 249030, Russia.
| | - Margarita Pustovalova
- State Research Center-Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow 123098, Russia.
- Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow 119991, Russia.
- Moscow Institute of Physics and Technology, Dolgoprudny 141700, Russia.
| | - Sergey Koryakin
- A. Tsyb Medical Radiological Research Centre-Branch of the National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation, Koroleva 4, Obninsk 249030, Russia.
| | - Evgenii Beketov
- A. Tsyb Medical Radiological Research Centre-Branch of the National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation, Koroleva 4, Obninsk 249030, Russia.
| | - Anatolii Lychagin
- A. Tsyb Medical Radiological Research Centre-Branch of the National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation, Koroleva 4, Obninsk 249030, Russia.
| | - Liliya Ulyanenko
- A. Tsyb Medical Radiological Research Centre-Branch of the National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation, Koroleva 4, Obninsk 249030, Russia.
| | - Andrey Kaprin
- National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation, Moscow 125284, Russia.
| | - Anna Grekhova
- State Research Center-Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow 123098, Russia.
- Emanuel Institute for Biochemical Physics, Russian Academy of Sciences, Moscow 119991, Russia.
| | - Alexandra M Ozerova
- Faculty of Biology, Lomonosov Moscow State University, GSP-1, Leninskie Gory, Moscow 119991, Russia.
| | - Ivan V Ozerov
- State Research Center-Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow 123098, Russia.
| | - Natalia Vorobyeva
- State Research Center-Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow 123098, Russia.
- Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow 119991, Russia.
| | - Peter Shegay
- Center for Innovative Radiological and Regenerative Technologies of the Ministry of Health of the Russian Federation, Koroleva 4, Obninsk 249030, Russia.
| | - Sergey Ivanov
- A. Tsyb Medical Radiological Research Centre-Branch of the National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation, Koroleva 4, Obninsk 249030, Russia.
| | - Sergey Leonov
- Moscow Institute of Physics and Technology, Dolgoprudny 141700, Russia.
- Institute of Cell Biophysics, Russian Academy of Sciences, Institutskaya St., 3, Pushchino 142290, Russia.
| | - Dmitry Klokov
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON K1N 6N5, Canada.
| | - Andreyan N Osipov
- State Research Center-Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow 123098, Russia.
- Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow 119991, Russia.
- Moscow Institute of Physics and Technology, Dolgoprudny 141700, Russia.
- Center for Innovative Radiological and Regenerative Technologies of the Ministry of Health of the Russian Federation, Koroleva 4, Obninsk 249030, Russia.
| |
Collapse
|
7
|
Vorob'eva NY, Kochetkov OA, Pustovalova MV, Grekhova AK, Blokhina TM, Yashkina EI, Osipov AA, Kabanov DI, Surin PP, Barchukov VG, Osipov AN. Comparative Analysis of the Formation of γH2AX Foci in Human Mesenchymal Stem Cells Exposed to 3H-Thymidine, Tritium Oxide, and X-Rays Irradiation. Bull Exp Biol Med 2018; 166:178-181. [PMID: 30417285 DOI: 10.1007/s10517-018-4309-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Indexed: 11/25/2022]
Abstract
We performed a comparative study of the formation of γН2АХ foci (a marker of DNA doublestrand breaks) in human bone marrow mesenchymal stem cells after 24-h incubation with 3Н-thimidin and tritium oxide with low specific activities (50-800 MBq/liter). The dependence of the number of γH2AX foci on specific activity of 3H-thymidine was described by a linear equation y=2.21+43.45x (R2=0.96), where y is the number of γH2AX foci per nucleus and x is specific activity in 1000 MBq/liter. For tritium oxide, the relationship was described by a linear equation y=2.52+6.70x (R2=0.97). Thus, the yield of DNA double-strand breaks after exposure to 3H-thymidine was 6.5-fold higher than after exposure to tritium oxide. Comparison of the effects of tritium oxide and X-ray radiation on the yield of DNA double-strand breaks showed that the relative biological efficiency of tritium oxide in a dose range of 3.78-60.26 mGy was 1.6-fold higher than that of X-ray radiation. Improvement of the methods of analysis of DNA double-strand breaks repair foci is highly promising in the context of creation of highly sensitive biodosimetry technologies for tritium compounds in humans.
Collapse
Affiliation(s)
- N Yu Vorob'eva
- A. I. Burnazyan State Research Center Federal Medical Biophysical Center, Federal Medical-Biological Agency, Moscow, Russia
| | - O A Kochetkov
- A. I. Burnazyan State Research Center Federal Medical Biophysical Center, Federal Medical-Biological Agency, Moscow, Russia
| | - M V Pustovalova
- N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
| | - A K Grekhova
- N. M. Emanuel Institute for Biochemical Physics, Russian Academy of Sciences, Moscow, Russia
| | - T M Blokhina
- N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
| | - E I Yashkina
- A. I. Burnazyan State Research Center Federal Medical Biophysical Center, Federal Medical-Biological Agency, Moscow, Russia
| | - A A Osipov
- A. I. Burnazyan State Research Center Federal Medical Biophysical Center, Federal Medical-Biological Agency, Moscow, Russia
| | - D I Kabanov
- A. I. Burnazyan State Research Center Federal Medical Biophysical Center, Federal Medical-Biological Agency, Moscow, Russia
| | - P P Surin
- A. I. Burnazyan State Research Center Federal Medical Biophysical Center, Federal Medical-Biological Agency, Moscow, Russia
| | - V G Barchukov
- A. I. Burnazyan State Research Center Federal Medical Biophysical Center, Federal Medical-Biological Agency, Moscow, Russia
| | - A N Osipov
- A. I. Burnazyan State Research Center Federal Medical Biophysical Center, Federal Medical-Biological Agency, Moscow, Russia.
| |
Collapse
|
8
|
Cortese F, Klokov D, Osipov A, Stefaniak J, Moskalev A, Schastnaya J, Cantor C, Aliper A, Mamoshina P, Ushakov I, Sapetsky A, Vanhaelen Q, Alchinova I, Karganov M, Kovalchuk O, Wilkins R, Shtemberg A, Moreels M, Baatout S, Izumchenko E, de Magalhães JP, Artemov AV, Costes SV, Beheshti A, Mao XW, Pecaut MJ, Kaminskiy D, Ozerov IV, Scheibye-Knudsen M, Zhavoronkov A. Vive la radiorésistance!: converging research in radiobiology and biogerontology to enhance human radioresistance for deep space exploration and colonization. Oncotarget 2018; 9:14692-14722. [PMID: 29581875 PMCID: PMC5865701 DOI: 10.18632/oncotarget.24461] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Accepted: 01/31/2018] [Indexed: 12/12/2022] Open
Abstract
While many efforts have been made to pave the way toward human space colonization, little consideration has been given to the methods of protecting spacefarers against harsh cosmic and local radioactive environments and the high costs associated with protection from the deleterious physiological effects of exposure to high-Linear energy transfer (high-LET) radiation. Herein, we lay the foundations of a roadmap toward enhancing human radioresistance for the purposes of deep space colonization and exploration. We outline future research directions toward the goal of enhancing human radioresistance, including upregulation of endogenous repair and radioprotective mechanisms, possible leeways into gene therapy in order to enhance radioresistance via the translation of exogenous and engineered DNA repair and radioprotective mechanisms, the substitution of organic molecules with fortified isoforms, and methods of slowing metabolic activity while preserving cognitive function. We conclude by presenting the known associations between radioresistance and longevity, and articulating the position that enhancing human radioresistance is likely to extend the healthspan of human spacefarers as well.
Collapse
Affiliation(s)
- Franco Cortese
- Biogerontology Research Foundation, London, UK
- Department of Biomedical and Molecular Sciences, Queen's University School of Medicine, Queen's University, Kingston, Ontario, Canada
| | - Dmitry Klokov
- Canadian Nuclear Laboratories, Chalk River, Ontario, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Ontario, Canada
| | - Andreyan Osipov
- Insilico Medicine, Inc., Emerging Technology Centers, Johns Hopkins University, Baltimore, MD, USA
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow, Russia
- Moscow Institute of Physics and Technology, Dolgoprudny, Russia
| | - Jakub Stefaniak
- Biogerontology Research Foundation, London, UK
- Nuffield Department of Medicine, Target Discovery Institute, University of Oxford, Oxford, UK
| | - Alexey Moskalev
- Moscow Institute of Physics and Technology, Dolgoprudny, Russia
- Laboratory of Molecular Radiobiology and Gerontology, Institute of Biology of Komi Science Center of Ural Branch of Russian Academy of Sciences, Syktyvkar, Russia
- Engelhardt Institute of Molecular Biology of Russian Academy of Sciences, Moscow, Russia
| | - Jane Schastnaya
- Insilico Medicine, Inc., Emerging Technology Centers, Johns Hopkins University, Baltimore, MD, USA
| | - Charles Cantor
- Boston University, Department of Biomedical Engineering, Boston, MA, USA
| | - Alexander Aliper
- Insilico Medicine, Inc., Emerging Technology Centers, Johns Hopkins University, Baltimore, MD, USA
- Laboratory of Bioinformatics, D. Rogachev Federal Medical Research Center of Pediatric Hematology, Oncology and Immunology, Moscow, Russia
| | - Polina Mamoshina
- Insilico Medicine, Inc., Emerging Technology Centers, Johns Hopkins University, Baltimore, MD, USA
- Computer Science Department, University of Oxford, Oxford, UK
| | - Igor Ushakov
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow, Russia
| | - Alex Sapetsky
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow, Russia
| | - Quentin Vanhaelen
- Insilico Medicine, Inc., Emerging Technology Centers, Johns Hopkins University, Baltimore, MD, USA
| | - Irina Alchinova
- Laboratory of Physicochemical and Ecological Pathophysiology, Institute of General Pathology and Pathophysiology, Moscow, Russia
- Research Institute for Space Medicine, Federal Medical Biological Agency, Moscow, Russia
| | - Mikhail Karganov
- Laboratory of Physicochemical and Ecological Pathophysiology, Institute of General Pathology and Pathophysiology, Moscow, Russia
| | - Olga Kovalchuk
- Canada Cancer and Aging Research Laboratories, Ltd., Lethbridge, Alberta, Canada
- University of Lethbridge, Lethbridge, Alberta, Canada
| | - Ruth Wilkins
- Environmental and Radiation and Health Sciences Directorate, Health Canada, Ottawa, Ontario, Canada
| | - Andrey Shtemberg
- Laboratory of Extreme Physiology, Institute of Medical and Biological Problems RAS, Moscow, Russia
| | - Marjan Moreels
- Radiobiology Unit, Interdisciplinary Biosciences, Institute for Environment, Health and Safety, Belgian Nuclear Research Centre, (SCK·CEN), Mol, Belgium
| | - Sarah Baatout
- Radiobiology Unit, Interdisciplinary Biosciences, Institute for Environment, Health and Safety, Belgian Nuclear Research Centre, (SCK·CEN), Mol, Belgium
- Department of Molecular Biotechnology, Ghent University, Ghent, Belgium
| | - Evgeny Izumchenko
- Insilico Medicine, Inc., Emerging Technology Centers, Johns Hopkins University, Baltimore, MD, USA
- The Johns Hopkins University, School of Medicine, Department of Otolaryngology, Head and Neck Cancer Research, Baltimore, MD, USA
| | - João Pedro de Magalhães
- Biogerontology Research Foundation, London, UK
- Integrative Genomics of Ageing Group, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, UK
| | - Artem V. Artemov
- Insilico Medicine, Inc., Emerging Technology Centers, Johns Hopkins University, Baltimore, MD, USA
| | | | - Afshin Beheshti
- Wyle Laboratories, Space Biosciences Division, NASA Ames Research Center, Mountain View, CA, USA
- Division of Hematology/Oncology, Molecular Oncology Research Institute, Tufts Medical Center, Boston, MA, USA
| | - Xiao Wen Mao
- Department of Basic Sciences, Division of Biomedical Engineering Sciences (BMES), Loma Linda University, Loma Linda, CA, USA
| | - Michael J. Pecaut
- Department of Basic Sciences, Division of Biomedical Engineering Sciences (BMES), Loma Linda University, Loma Linda, CA, USA
| | - Dmitry Kaminskiy
- Biogerontology Research Foundation, London, UK
- Deep Knowledge Life Sciences, London, UK
| | - Ivan V. Ozerov
- Insilico Medicine, Inc., Emerging Technology Centers, Johns Hopkins University, Baltimore, MD, USA
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow, Russia
| | | | - Alex Zhavoronkov
- Biogerontology Research Foundation, London, UK
- Insilico Medicine, Inc., Emerging Technology Centers, Johns Hopkins University, Baltimore, MD, USA
| |
Collapse
|
9
|
Pustovalova M, Astrelina ТA, Grekhova A, Vorobyeva N, Tsvetkova A, Blokhina T, Nikitina V, Suchkova Y, Usupzhanova D, Brunchukov V, Kobzeva I, Karaseva Т, Ozerov IV, Samoylov A, Bushmanov A, Leonov S, Izumchenko E, Zhavoronkov A, Klokov D, Osipov AN. Residual γH2AX foci induced by low dose x-ray radiation in bone marrow mesenchymal stem cells do not cause accelerated senescence in the progeny of irradiated cells. Aging (Albany NY) 2018; 9:2397-2410. [PMID: 29165316 PMCID: PMC5723693 DOI: 10.18632/aging.101327] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Accepted: 11/11/2017] [Indexed: 01/09/2023]
Abstract
Mechanisms underlying the effects of low-dose ionizing radiation (IR) exposure (10-100 mGy) remain unknown. Here we present a comparative study of early (less than 24h) and delayed (up to 11 post-irradiation passages) radiation effects caused by low (80 mGy) vs intermediate (1000 mGy) dose X-ray exposure in cultured human bone marrow mesenchymal stem cells (MSCs). We show that γН2АХ foci induced by an intermediate dose returned back to the control value by 24 h post-irradiation. In contrast, low-dose irradiation resulted in residual γН2АХ foci still present at 24 h. Notably, these low dose induced residual γН2АХ foci were not co-localized with рАТМ foci and were observed predominantly in the proliferating Кi67 positive (Кi67+) cells. The number of γН2АХ foci and the fraction of nonproliferating (Кi67-) and senescent (SA-β-gal+) cells measured at passage 11 were increased in cultures exposed to an intermediate dose compared to unirradiated controls. These delayed effects were not seen in the progeny of cells that were irradiated with low-dose X-rays, although such exposure resulted in residual γН2АХ foci in directly irradiated cells. Taken together, our results support the hypothesis that the low-dose IR induced residual γH2AХ foci do not play a role in delayed irradiation consequences, associated with cellular senescence in cultured MSCs.
Collapse
Affiliation(s)
- Margarita Pustovalova
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow 123098, Russia.,Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow 119991, Russia
| | - Тatiana A Astrelina
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow 123098, Russia
| | - Anna Grekhova
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow 123098, Russia.,Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow 119991, Russia.,Emanuel Institute for Biochemical Physics, Russian Academy of Sciences, Moscow 119991, Russia
| | - Natalia Vorobyeva
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow 123098, Russia.,Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow 119991, Russia
| | - Anastasia Tsvetkova
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow 123098, Russia.,Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region 141700, Russia
| | - Taisia Blokhina
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow 123098, Russia.,Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow 119991, Russia
| | - Victoria Nikitina
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow 123098, Russia
| | - Yulia Suchkova
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow 123098, Russia
| | - Daria Usupzhanova
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow 123098, Russia
| | - Vitalyi Brunchukov
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow 123098, Russia
| | - Irina Kobzeva
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow 123098, Russia
| | - Тatiana Karaseva
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow 123098, Russia
| | - Ivan V Ozerov
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow 123098, Russia.,Insilico Medicine, Inc, ETC, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Aleksandr Samoylov
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow 123098, Russia
| | - Andrey Bushmanov
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow 123098, Russia
| | - Sergey Leonov
- Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region 141700, Russia.,Institute of Cell Biophysics, Russian Academy of Sciences, Pushchino, Moscow Region, 142290, Russia
| | - Evgeny Izumchenko
- Department of Otolaryngology-Head and Neck Cancer Research, Johns Hopkins University, School of Medicine, Baltimore, MD 21218, USA
| | - Alex Zhavoronkov
- Insilico Medicine, Inc, ETC, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Dmitry Klokov
- Canadian Nuclear Laboratories, Chalk River, Ontario K0J1P0, Canada.,University of Ottawa, Ottawa, Ontario K1N6N5, Canada
| | - Andreyan N Osipov
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow 123098, Russia.,Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow 119991, Russia.,Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region 141700, Russia.,Insilico Medicine, Inc, ETC, Johns Hopkins University, Baltimore, MD 21218, USA
| |
Collapse
|
10
|
Pustovalova M, Grekhova A, Astrelina Т, Nikitina V, Dobrovolskaya E, Suchkova Y, Kobzeva I, Usupzhanova D, Vorobyeva N, Samoylov A, Bushmanov A, Ozerov IV, Zhavoronkov A, Leonov S, Klokov D, Osipov AN. Accumulation of spontaneous γH2AX foci in long-term cultured mesenchymal stromal cells. Aging (Albany NY) 2017; 8:3498-3506. [PMID: 27959319 PMCID: PMC5270682 DOI: 10.18632/aging.101142] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 12/03/2016] [Indexed: 01/15/2023]
Abstract
Expansion of mesenchymal stromal/stem cells (MSCs) used in clinical practices may be associated with accumulation of genetic instability. Understanding temporal and mechanistic aspects of this process is important for improving stem cell therapy protocols. We used γH2AX foci as a marker of a genetic instability event and quantified it in MSCs that undergone various numbers of passage (3-22). We found that γH2AX foci numbers increased in cells of late passages, with a sharp increase at passage 16-18. By measuring in parallel foci of ATM phosphorylated at Ser-1981 and their co-localization with γH2AX foci, along with differentiating cells into proliferating and resting by using a Ki67 marker, we conclude that the sharp increase in γH2AX foci numbers was ATM-independent and happened predominantly in proliferating cells. At the same time, gradual and moderate increase in γH2AX foci with passage number seen in both resting and proliferating cells may represent a slow, DNA double-strand break related component of the accumulation of genetic instability in MSCs. Our results provide important information on selecting appropriate passage numbers exceeding which would be associated with substantial risks to a patient-recipient, both with respect to therapeutic efficiency and side-effects related to potential neoplastic transformations due to genetic instability acquired by MSCs during expansion.
Collapse
Affiliation(s)
- Margarita Pustovalova
- State Research Center-Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency (SRC-FMBC), Moscow 123098, Russia
| | - Anna Grekhova
- State Research Center-Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency (SRC-FMBC), Moscow 123098, Russia
| | - Тatiana Astrelina
- State Research Center-Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency (SRC-FMBC), Moscow 123098, Russia
| | - Viktoria Nikitina
- State Research Center-Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency (SRC-FMBC), Moscow 123098, Russia
| | - Ekaterina Dobrovolskaya
- State Research Center-Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency (SRC-FMBC), Moscow 123098, Russia
| | - Yulia Suchkova
- State Research Center-Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency (SRC-FMBC), Moscow 123098, Russia
| | - Irina Kobzeva
- State Research Center-Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency (SRC-FMBC), Moscow 123098, Russia
| | - Darya Usupzhanova
- State Research Center-Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency (SRC-FMBC), Moscow 123098, Russia
| | - Natalia Vorobyeva
- State Research Center-Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency (SRC-FMBC), Moscow 123098, Russia
| | - Aleksandr Samoylov
- State Research Center-Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency (SRC-FMBC), Moscow 123098, Russia
| | - Andrey Bushmanov
- State Research Center-Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency (SRC-FMBC), Moscow 123098, Russia
| | - Ivan V Ozerov
- State Research Center-Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency (SRC-FMBC), Moscow 123098, Russia.,Insilico Medicine, Inc., Emerging Technology Centers, Johns Hopkins University at Eastern, Baltimore, MD 21218, USA
| | - Alex Zhavoronkov
- Insilico Medicine, Inc., Emerging Technology Centers, Johns Hopkins University at Eastern, Baltimore, MD 21218, USA.,Life Sciences Center, Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region 141700, Russia
| | - Sergey Leonov
- Life Sciences Center, Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region 141700, Russia
| | - Dmitry Klokov
- Canadian Nuclear Laboratories, Chalk River, ON K0J1P0, Canada
| | - Andreyan N Osipov
- State Research Center-Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency (SRC-FMBC), Moscow 123098, Russia.,Insilico Medicine, Inc., Emerging Technology Centers, Johns Hopkins University at Eastern, Baltimore, MD 21218, USA.,Life Sciences Center, Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region 141700, Russia
| |
Collapse
|
11
|
γH2AX, 53BP1 and Rad51 protein foci changes in mesenchymal stem cells during prolonged X-ray irradiation. Oncotarget 2017; 8:64317-64329. [PMID: 28969073 PMCID: PMC5610005 DOI: 10.18632/oncotarget.19203] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Accepted: 06/20/2017] [Indexed: 11/25/2022] Open
Abstract
At high exposure levels ionizing radiation is a carcinogen. Little is known about how human stem cells, which are known to contribute to tumorigenesis, respond to prolonged radiation exposures. We studied formation of DNA double strand breaks, accessed as γH2AX and 53BP1 foci, in human mesenchymal stem cells (MSCs) exposed to either acute (5400 mGy/h) or prolonged (270 mGy/h) X-irradiation. We show a linear γH2AX and 53BP1 dose response for acute exposures. In contrast, prolonged exposure resulted in a dose-response curve that had an initial linear portion followed by a plateau. Analysis of Rad51 foci, as a marker of homologous recombination, in cells exposed to prolonged irradiation revealed a threshold in a dose response. Using Ki67 as a marker of proliferating cells, we show no difference in the γH2AX distribution in proliferating vs. quiescent cells. However, Rad51 foci were found almost exclusively in proliferating cells. Concurrent increases in the fraction of S/G2 cells were detected in cells exposed to prolonged irradiation by scoring CENPF-positive cells. Our data suggest that prolonged exposure of MSCs to ionizing radiation leads to cell cycle redistribution and associated activation of homologous recombination. Also, proliferation status may significantly affect the biological outcome, since homologous repair is not activated in resting MSCs.
Collapse
|
12
|
Can high dose rates used in cancer radiotherapy change therapeutic effectiveness? Contemp Oncol (Pozn) 2017; 20:449-452. [PMID: 28239281 PMCID: PMC5320456 DOI: 10.5114/wo.2016.65603] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Accepted: 09/30/2016] [Indexed: 11/17/2022] Open
Abstract
Current cancer radiotherapy relies on increasingly high dose rates of ionising radiation (100-2400 cGy/min). It is possible that changing dose rates is not paralleled by treatment effectiveness. Irradiating cancer cells is assumed to induce molecular alterations that ultimately lead to apoptotic death. Studies comparing the efficacy of radiation-induced DNA damage and apoptotic death in relation to varying dose rates do not provide unequivocal data. Whereas some have demonstrated higher dose rates (single dose) to effectively kill cancer cells, others claim the opposite. Recent gene expression studies in cells subject to variable dose rates stress alterations in molecular signalling, especially in the expression of genes linked to cell survival, immune response, and tumour progression. Novel irradiation techniques of modern cancer treatment do not rely anymore on maintaining absolute constancy of dose rates during radiation emission: instead, timing and exposure areas are regulated temporally and spatially by modulating the dose rate and beam shape. Such conditions may be reflected in tumour cells' response to irradiation, and this is supported by the references provided.
Collapse
|
13
|
Chen H, Wang B, Wang C, Cao W, Zhang J, Ma Y, Hong Y, Fu S, Wu F, Ying W. Dose-rate plays a significant role in synchrotron radiation X-ray-induced damage of rodent testes. INTERNATIONAL JOURNAL OF PHYSIOLOGY, PATHOPHYSIOLOGY AND PHARMACOLOGY 2016; 8:140-145. [PMID: 28078052 PMCID: PMC5209442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Accepted: 11/08/2016] [Indexed: 06/06/2023]
Abstract
Synchrotron radiation (SR) X-ray has significant potential for applications in medical imaging and cancer treatment. However, the mechanisms underlying SR X-ray-induced tissue damage remain unclear. Previous studies on regular X-ray-induced tissue damage have suggested that dose-rate could affect radiation damage. Because SR X-ray has exceedingly high dose-rate compared to regular X-ray, it remains to be determined if dose-rate may affect SR X-ray-induced tissue damage. We used rodent testes as a model to investigate the role of dose-rate in SR X-ray-induced tissue damage. One day after SR X-ray irradiation, we determined the effects of the irradiation of the same dosage at two different dose-rates, 0.11 Gy/s and 1.1 Gy/s, on TUNEL signals, caspase-3 activation and DNA double-strand breaks (DSBs) of the testes. Compared to those produced by the irradiation at 0.11 Gy/s, irradiation at 1.1 Gy/s produced higher levels of DSBs, TUNEL signals, and caspase-3 activation in the testes. Our study has provided the first evidence suggesting that dose-rate could be a significant factor in SR X-ray-induced tissue damage, which may establish a valuable base for utilizing this factor to manipulate the tissue damage in SR X-ray-based medical applications.
Collapse
Affiliation(s)
- Heyu Chen
- School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong UniversityShanghai, P. R. China
| | - Ban Wang
- School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong UniversityShanghai, P. R. China
| | - Caixia Wang
- School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong UniversityShanghai, P. R. China
| | - Wei Cao
- School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong UniversityShanghai, P. R. China
| | - Jie Zhang
- School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong UniversityShanghai, P. R. China
| | - Yingxin Ma
- School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong UniversityShanghai, P. R. China
| | - Yunyi Hong
- School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong UniversityShanghai, P. R. China
| | - Shen Fu
- Department of Radiation Oncology, Shanghai Proton and Heavy Ion Center, Fudan University Cancer HospitalShanghai, P. R. China
| | - Fan Wu
- Department of Civil Engineering, School of Naval Architecture, Ocean & Civil Engineering, Shanghai Jiao Tong UniversityShanghai, P. R. China
| | - Weihai Ying
- School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong UniversityShanghai, P. R. China
| |
Collapse
|
14
|
Low doses of X-rays induce prolonged and ATM-independent persistence of γH2AX foci in human gingival mesenchymal stem cells. Oncotarget 2016; 6:27275-87. [PMID: 26314960 PMCID: PMC4694989 DOI: 10.18632/oncotarget.4739] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Accepted: 07/10/2015] [Indexed: 12/11/2022] Open
Abstract
Diagnostic imaging delivering low doses of radiation often accompany human mesenchymal stem cells (MSCs)-based therapies. However, effects of low dose radiation on MSCs are poorly characterized. Here we examine patterns of phosphorylated histone H2AX (γH2AX) and phospho-S1981 ATM (pATM) foci formation in human gingiva-derived MSCs exposed to X-rays in time-course and dose-response experiments. Both γH2AX and pATM foci accumulated linearly with dose early after irradiation (5–60 min), with a maximum induction observed at 30–60 min (37 ± 3 and 32 ± 3 foci/cell/Gy for γH2AX and pATM, respectively). The number of γH2AX foci produced by intermediate doses (160 and 250 mGy) significantly decreased (40–60%) between 60 and 240 min post-irradiation, indicating rejoining of DNA double-strand breaks. In contrast, γH2AX foci produced by low doses (20–80 mGy) did not change after 60 min. The number of pATM foci between 60 and 240 min decreased down to control values in a dose-independent manner. Similar kinetics was observed for pATM foci co-localized with γH2AX foci. Collectively, our results suggest differential DNA double-strand break signaling and processing in response to low vs. intermediate doses of X-rays in human MSCs. Furthermore, mechanisms governing the prolonged persistence of γH2AX foci in these cells appear to be ATM-independent.
Collapse
|
15
|
Osipov AN, Grekhova A, Pustovalova M, Ozerov IV, Eremin P, Vorobyeva N, Lazareva N, Pulin A, Zhavoronkov A, Roumiantsev S, Klokov D, Eremin I. Activation of homologous recombination DNA repair in human skin fibroblasts continuously exposed to X-ray radiation. Oncotarget 2016; 6:26876-85. [PMID: 26337087 PMCID: PMC4694959 DOI: 10.18632/oncotarget.4946] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Accepted: 07/31/2015] [Indexed: 11/25/2022] Open
Abstract
Molecular and cellular responses to protracted ionizing radiation exposures are poorly understood. Using immunofluorescence microscopy, we studied the kinetics of DNA repair foci formation in normal human fibroblasts exposed to X-rays at a dose rate of 4.5 mGy/min for up to 6 h. We showed that both the number of γH2AX foci and their integral fluorescence intensity grew linearly with time of irradiation up to 2 h. A plateau was observed between 2 and 6 h of exposure, indicating a state of balance between formation and repair of DNA double-strand breaks. In contrast, the number and intensity of foci formed by homologous recombination protein RAD51 demonstrated a continuous increase during 6 h of irradiation. We further showed that the enhancement of the homologous recombination repair was not due to redistribution of cell cycle phases. Our results indicate that continuous irradiation of normal human cells triggers DNA repair responses that are different from those elicited after acute irradiation. The observed activation of the error-free homologous recombination DNA double-strand break repair pathway suggests compensatory adaptive mechanisms that may help alleviate long-term biological consequences and could potentially be utilized both in radiation protection and medical practices.
Collapse
Affiliation(s)
- Andreyan N Osipov
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency (SRC-FMBC), Moscow 123098, Russia.,Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow 119991, Russia.,Dmitry Rogachev Federal Research Center of Pediatric Hematology, Oncology and Immunology, Moscow 117997, Russia.,Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region 141700, Russia
| | - Anna Grekhova
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency (SRC-FMBC), Moscow 123098, Russia.,Emanuel Institute for Biochemical Physics, Russian Academy of Sciences, Moscow 119991, Russia
| | - Margarita Pustovalova
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency (SRC-FMBC), Moscow 123098, Russia.,Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow 119991, Russia
| | - Ivan V Ozerov
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency (SRC-FMBC), Moscow 123098, Russia
| | - Petr Eremin
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency (SRC-FMBC), Moscow 123098, Russia
| | - Natalia Vorobyeva
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency (SRC-FMBC), Moscow 123098, Russia.,Dmitry Rogachev Federal Research Center of Pediatric Hematology, Oncology and Immunology, Moscow 117997, Russia
| | - Natalia Lazareva
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency (SRC-FMBC), Moscow 123098, Russia
| | - Andrey Pulin
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency (SRC-FMBC), Moscow 123098, Russia
| | - Alex Zhavoronkov
- Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region 141700, Russia.,Insilico Medicine, Inc, ETC, Johns Hopkins University, Baltimore, MD 21218, USA.,The Biogerontology Research Foundation, BGRF, London W1J 5NE, UK
| | - Sergey Roumiantsev
- Dmitry Rogachev Federal Research Center of Pediatric Hematology, Oncology and Immunology, Moscow 117997, Russia.,Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region 141700, Russia.,N.I. Pirogov Russian National Research Medical University, Moscow 117997, Russia
| | - Dmitry Klokov
- Canadian Nuclear Laboratories, Chalk River, ON K0J1P0, Canada
| | - Ilya Eremin
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency (SRC-FMBC), Moscow 123098, Russia
| |
Collapse
|
16
|
Bernadotte A, Mikhelson VM, Spivak IM. Markers of cellular senescence. Telomere shortening as a marker of cellular senescence. Aging (Albany NY) 2016; 8:3-11. [PMID: 26805432 PMCID: PMC4761709 DOI: 10.18632/aging.100871] [Citation(s) in RCA: 285] [Impact Index Per Article: 35.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/15/2023]
Abstract
The cellular senescence definition comes to the fact of cells irreversible proliferation disability. Besides the cell cycle arrest, senescent cells go through some morphological, biochemical, and functional changes which are the signs of cellular senescence. The senescent cells (including replicative senescence and stress-induced premature senescence) of all the tissues look alike. They are metabolically active and possess the set of characteristics in vitro and in vivo, which are known as biomarkers of aging and cellular senescence. Among biomarkers of cellular senescence telomere shortening is a rather elegant frequently used biomarker. Validity of telomere shortening as a marker for cellular senescence is based on theoretical and experimental data.
Collapse
Affiliation(s)
- Alexandra Bernadotte
- Karolinska Institute, Department of Medical Biochemistry and Biophysics, Stockholm, 14157, Sweden
- St. Petersburg Institute of Bioregulation and Gerontology, Russian Academy of Sciences, Saint-Petersburg, 197110 Russia
| | - Victor M. Mikhelson
- Institute of Cytology, Russian Academy of Sciences, Saint-Petersburg, 194064, Russia
| | - Irina M. Spivak
- Institute of Cytology, Russian Academy of Sciences, Saint-Petersburg, 194064, Russia
- Saint-Petersburg's State University, Saint-Petersburg, 199034, Russia
- Saint-Petersburg's Polytechnic State University, Saint-Petersburg, 195251 Russia
| |
Collapse
|
17
|
Turner HC, Shuryak I, Taveras M, Bertucci A, Perrier JR, Chen C, Elliston CD, Johnson GW, Smilenov LB, Amundson SA, Brenner DJ. Effect of dose rate on residual γ-H2AX levels and frequency of micronuclei in X-irradiated mouse lymphocytes. Radiat Res 2015; 183:315-24. [PMID: 25738897 DOI: 10.1667/rr13860.1] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The biological risks associated with low-dose-rate (LDR) radiation exposures are not yet well defined. To assess the risk related to DNA damage, we compared the yields of two established biodosimetry end points, γ-H2AX and micronuclei (MNi), in peripheral mouse blood lymphocytes after prolonged in vivo exposure to LDR X rays (0.31 cGy/min) vs. acute high-dose-rate (HDR) exposure (1.03 Gy/min). C57BL/6 mice were total-body irradiated with 320 kVP X rays with doses of 0, 1.1, 2.2 and 4.45 Gy. Residual levels of total γ-H2AX fluorescence in lymphocytes isolated 24 h after the start of irradiation were assessed using indirect immunofluorescence methods. The terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) assay was used to determine apoptotic cell frequency in lymphocytes sampled at 24 h. Curve fitting analysis suggested that the dose response for γ-H2AX yields after acute exposures could be described by a linear dependence. In contrast, a linear-quadratic dose-response shape was more appropriate for LDR exposure (perhaps reflecting differences in repair time after different LDR doses). Dose-rate sparing effects (P < 0.05) were observed at doses ≤2.2 Gy, such that the acute dose γ-H2AX and TUNEL-positive cell yields were significantly larger than the equivalent LDR yields. At the 4.45 Gy dose there was no difference in γ-H2AX expression between the two dose rates, whereas there was a two- to threefold increase in apoptosis in the LDR samples compared to the equivalent 4.45 Gy acute dose. Micronuclei yields were measured at 24 h and 7 days using the in vitro cytokinesis-blocked micronucleus (CBMN) assay. The results showed that MNi yields increased up to 2.2 Gy with no further increase at 4.45 Gy and with no detectable dose-rate effect across the dose range 24 h or 7 days post exposure. In conclusion, the γ-H2AX biomarker showed higher sensitivity to measure dose-rate effects after low-dose LDR X rays compared to MNi formation; however, confounding factors such as variable repair times post exposure, increased cell killing and cell cycle block likely contributed to the yields of MNi with accumulating doses of ionizing radiation.
Collapse
Affiliation(s)
- H C Turner
- Center for Radiological Research, Columbia University Medical Center, New York, New York 10032
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Sheng C, Chen H, Wang B, Wang C, Lin L, Li Y, Ying W. Poly(ADP-ribose) polymerase activation mediates synchrotron radiation X-ray-induced damage of rodent testes by exacerbating DNA damage and apoptotic changes. Int J Radiat Biol 2014; 90:580-6. [DOI: 10.3109/09553002.2014.908263] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
19
|
DNA comet Giemsa staining for conventional bright-field microscopy. Int J Mol Sci 2014; 15:6086-95. [PMID: 24727376 PMCID: PMC4013617 DOI: 10.3390/ijms15046086] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Revised: 03/18/2014] [Accepted: 03/26/2014] [Indexed: 11/16/2022] Open
Abstract
This study was undertaken to evaluate the compatibility of Giemsa staining protocol with the comet assay. We showed, for the first time, that DNA comets can be visualized and analyzed using Giemsa staining. We generated DNA damage dose response curves for human peripheral blood lymphocytes exposed to X-ray radiation using the comet assay with either SybrGreen I or Giemsa stain. The dose response curves were fitted by linear regressions (R2>0.977). The SybrGreen I results showed only ~1.2-fold higher slope coefficient (method sensitivity) compared to the Giemsa results. The unexpectedly high sensitivity of Giemsa staining for the comet assay is due to the Romanowsky-Giemsa effect, the stain photo-stability and the higher resolution of bright-field imaging compared to fluorescence imaging. Our results demonstrate that Giemsa staining can effectively be used for measuring DNA damage by the comet assay. The low cost and availability of Giemsa stain makes this method affordable for any low budget research and will facilitate new applications of the comet assay in biology and medicine.
Collapse
|