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Ferreira-Lucena LR, Xavier AISF, Netto AM, Magnata SDSLP, Siqueira Lima G, Amaral A. Extending culture time to improve Mitotic Index for cytogenetic dosimetry. Int J Radiat Biol 2024:1-12. [PMID: 38787719 DOI: 10.1080/09553002.2024.2356545] [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: 11/17/2022] [Accepted: 05/13/2024] [Indexed: 05/26/2024]
Abstract
PURPOSE To analyze the effects of extending lymphocyte cultivation time on the Mitotic Index, frequency of first-division cells, and dose estimation after irradiating blood samples with different doses of radiation. MATERIALS AND METHODS Blood samples from two healthy male volunteers were separately irradiated with three doses (3, 5, and 6 Gy) using a 60Co gamma source (average dose rate: 1.48 kGy.h-1) and cultivated in vitro for conventional (48 h) and extended (56, 68, and 72 h) amounts of time. Colcemid (0.01 µg.mL-1) was added at the beginning of the culture period. Cells were fixed, stained with fluorescence plus Giemsa (FPG), and analyzed under a light microscope. The effects of prolonged culture duration on the Mitotic Index (MI), frequency of first-division cells (M1 cells), and the First-Division Mitotic Index (FDMI) were investigated. The estimation of delivered doses was conducted using a conventional 48h-culture calibration curve. RESULTS Overall, cells presented higher MI (up to 12-fold) with the extension of culture, while higher radiation doses led to lower MI values (up to 80% reduction at 48 h). Cells irradiated with higher doses (5 and 6 Gy) had the most significant increase (5- to 12-fold) of MI as the cultivation was prolonged. The frequency of M1 cells decreased with the prolongation of culture for all doses (up to 75% reduction), while irradiated cells presented higher frequencies of M1 cells than non-irradiated ones. FDMI increased for all irradiated cultures but most markedly in those irradiated with higher doses (up to 10-fold). The conventional 48h-culture calibration curve proved adequate for assessing the delivered dose based on dicentric frequency following a 72-hour culture. CONCLUSION Compared to the conventional 48-hour protocol, extending the culture length to 72 hours significantly increased the Mitotic Index and the number of first-division metaphases of irradiated lymphocytes, providing slides with a better scorable metaphase density. Extending the culture time to 72 hours, combined with FPG staining to score exclusively first-division metaphases, improved the counting of dicentric chromosomes. The methodology presented and discussed in this study can be a powerful tool for dicentric-based biodosimetry, especially when exposure to high radiation doses is involved.
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Affiliation(s)
- Luciano Rodolfo Ferreira-Lucena
- Nuclear Energy Department, Laboratory of Modeling and Biological Dosimetry, Federal University of Pernambuco, Recife, Brazil
| | | | - André Maciel Netto
- Nuclear Energy Department, Laboratory of Modeling and Biological Dosimetry, Federal University of Pernambuco, Recife, Brazil
| | | | - Giovanna Siqueira Lima
- Nuclear Energy Department, Laboratory of Modeling and Biological Dosimetry, Federal University of Pernambuco, Recife, Brazil
| | - Ademir Amaral
- Nuclear Energy Department, Laboratory of Modeling and Biological Dosimetry, Federal University of Pernambuco, Recife, Brazil
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Kosarnia M, Bahreyni-Toossi MT, Gholamhosseinian H, Dolat E, Fakour-Mollaee P, Azimian H. Establishment and validation of a calibration curve for dicentric chromosome induced by 6MV X-ray. RADIATION PROTECTION DOSIMETRY 2023; 199:1410-1415. [PMID: 37448196 DOI: 10.1093/rpd/ncad200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 03/12/2023] [Accepted: 06/22/2023] [Indexed: 07/15/2023]
Abstract
Radiation during radiotherapy and nuclear accidents is currently one of the biggest concerns for the international community. Biological dosimetry examines the amount of damage caused by radiation at the cellular level by quantifying a radiation biomarker. In particular, the dicentric chromosome assay is a biodosimetric technique that can quantify radiation damage by correlating radiation dose exposure with the frequency of dicentric chromosomes in the peripheral lymphocytes extracted from exposed individuals. This study aims to present of the reference dose-response calibration curve for biodosimetry laboratory of Mashhad University of Medical Sciences (north-east of Iran). In all, 40 samples of peripheral blood from four healthy volunteers were irradiated at doses of 0-5 Gray in a customised water phantom using a 6 MV X-rays at dose rate of 2 Gy/min from a linear accelerator. The irradiated samples were cultured and analysed according to the International Atomic Energy Agency Cytogenetic Dosimetry Protocol (2011) with some modifications. Linear-quadratic model curve fitting and further statistical analysis were done using Chromosome Aberration Calculation Software Version 2.0 and Dose Estimate (Version 5.2). The curve equation obtained was ${Y}_{dic}=0.0533{D}^2+0.0231D+0.0001$ and was in the range of other studies. Validation of the calibration curve was done by estimating the dose of blind samples.
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Affiliation(s)
- Morteza Kosarnia
- Department of Medical Physics, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad 9138813944, Iran
| | | | - Hamid Gholamhosseinian
- Medical Physics Research Center, Mashhad University of Medical Sciences, Mashhad 9138813944, Iran
| | - Elham Dolat
- Department of Medical Physics, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad 9138813944, Iran
| | - Parisa Fakour-Mollaee
- Department of Medical Physics, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad 9138813944, Iran
| | - Hosein Azimian
- Medical Physics Research Center, Mashhad University of Medical Sciences, Mashhad 9138813944, Iran
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3
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Jeong SK, Oh SJ, Kang YR, Kim H, Kye YU, Lee SH, Lee CG, Park MT, Baek JH, Kim JS, Jeong MH, Jo WS. Biological dosimetry dose-response curves for residents living near nuclear power plants in South Korea. Sci Prog 2023; 106:368504231198935. [PMID: 37769294 PMCID: PMC10540589 DOI: 10.1177/00368504231198935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/30/2023]
Abstract
The purpose of this study was to establish the dose-response curves for biological dosimetry of the Dong Nam Institute of Radiological and Medical Sciences to monitor radiation exposure of local residents in the vicinity of the nuclear power plant. The blood samples of five healthy volunteers were irradiated with gamma ray, and each sample was divided equally for analysis of chromosomal aberrations by Giemsa staining and three-color fluorescence in situ hybridization painting of the triplet (chromosomes #1, #2, and #4). The results of chromosomal aberrations followed the Poisson distribution in all individual and averaged data which include inter-individual variation in radiation susceptibility. Cytogenetics Dose Estimate Software version 5.2 was used to fit the dose-response curve and to determine the coefficients of linear-quadratic equations. The goodness of fit of the curves and statistical significance of fitted α and β-coefficients were confirmed in both Giemsa-based dicentric analysis and FISH-based translocation analysis. The coefficients calculated from the five-donor average data were almost identical in both of the analyses. We also present the results that the dose-response curve for dicentric chromosomes plus fragments could be more effective for dose estimation following low-dose radiation accidents.
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Affiliation(s)
- Soo Kyung Jeong
- Department of Research Center, Dongnam Institute of Radiological & Medical Sciences, Gijang-gun, Busan, Republic of Korea
- Department of Microbiology, Dong-A University College of Medicine, Seo-gu, Busan, Republic of Korea
| | - Su Jung Oh
- Department of Research Center, Dongnam Institute of Radiological & Medical Sciences, Gijang-gun, Busan, Republic of Korea
| | - Yeong-Rok Kang
- Department of Research Center, Dongnam Institute of Radiological & Medical Sciences, Gijang-gun, Busan, Republic of Korea
| | - HyoJin Kim
- Department of Research Center, Dongnam Institute of Radiological & Medical Sciences, Gijang-gun, Busan, Republic of Korea
| | - Yong Uk Kye
- Department of Research Center, Dongnam Institute of Radiological & Medical Sciences, Gijang-gun, Busan, Republic of Korea
| | - Seong Hun Lee
- Department of Research Center, Dongnam Institute of Radiological & Medical Sciences, Gijang-gun, Busan, Republic of Korea
| | - Chang Geun Lee
- Department of Research Center, Dongnam Institute of Radiological & Medical Sciences, Gijang-gun, Busan, Republic of Korea
| | - Moon-Taek Park
- Department of Research Center, Dongnam Institute of Radiological & Medical Sciences, Gijang-gun, Busan, Republic of Korea
| | - Jeong-Hwa Baek
- Department of Research Center, Dongnam Institute of Radiological & Medical Sciences, Gijang-gun, Busan, Republic of Korea
| | - Joong Sun Kim
- College of Veterinary Medicine and BK21 Plus Project Team, Chonnam National University, Gwangju, Republic of Korea
| | - Min Ho Jeong
- Department of Microbiology, Dong-A University College of Medicine, Seo-gu, Busan, Republic of Korea
| | - Wol Soon Jo
- Department of Research Center, Dongnam Institute of Radiological & Medical Sciences, Gijang-gun, Busan, Republic of Korea
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4
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Royba E, Repin M, Balajee AS, Shuryak I, Pampou S, Karan C, Wang YF, Lemus OD, Obaid R, Deoli N, Wuu CS, Brenner DJ, Garty G. Validation of a High-Throughput Dicentric Chromosome Assay Using Complex Radiation Exposures. Radiat Res 2023; 199:1-16. [PMID: 35994701 PMCID: PMC9947868 DOI: 10.1667/rade-22-00007.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 10/24/2022] [Indexed: 01/12/2023]
Abstract
Validation of biodosimetry assays is routinely performed using primarily orthovoltage irradiators at a conventional dose rate of approximately 1 Gy/min. However, incidental/ accidental exposures caused by nuclear weapons can be more complex. The aim of this work was to simulate the DNA damage effects mimicking those caused by the detonation of a several kilotons improvised nuclear device (IND). For this, we modeled complex exposures to: 1. a mixed (photons + IND-neutrons) field and 2. different dose rates that may come from the blast, nuclear fallout, or ground deposition of radionuclides (ground shine). Additionally, we assessed whether myeloid cytokines affect the precision of radiation dose estimation by modulating the frequency of dicentric chromosomes. To mimic different exposure scenarios, several irradiation systems were used. In a mixed field study, human blood samples were exposed to a photon field enriched with neutrons (ranging from 10% to 37%) from a source that mimics Hiroshima's A-bomb's energy spectrum (0.2-9 MeV). Using statistical analysis, we assessed whether photons and neutrons act in an additive or synergistic way to form dicentrics. For the dose rates study, human blood was exposed to photons or electrons at dose rates ranging from low (where the dose was spread over 32 h) to extremely high (where the dose was delivered in a fraction of a microsecond). Potential effects of cytokine treatment on biodosimetry dose predictions were analyzed in irradiated blood subjected to Neupogen or Neulasta for 24 or 48 h at the concentration recommended to forestall manifestation of an acute radiation syndrome in bomb survivors. All measurements were performed using a robotic station, the Rapid Automated Biodosimetry Tool II, programmed to culture lymphocytes and score dicentrics in multiwell plates (the RABiT-II DCA). In agreement with classical concepts of radiation biology, the RABiT-II DCA calibration curves suggested that the frequency of dicentrics depends on the type of radiation and is modulated by changes in the dose rate. The resulting dose-response curves suggested an intermediate dicentric yields and additive effects of photons and IND-neutrons in the mixed field. At ultra-high dose rate (600 Gy/s), affected lymphocytes exhibited significantly fewer dicentrics (P < 0.004, t test). In contrast, we did not find the dose-response modification effects of radiomitigators on the yields of dicentrics (Bonferroni corrected P > 0.006, ANOVA test). This result suggests no bias in the dose predictions should be expected after emergency cytokine treatment initiated up to 48 h prior to blood collection for dicentric analysis.
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Affiliation(s)
- Ekaterina Royba
- Center for Radiological Research, Columbia University Irving Medical Center, New York, New York
| | - Mikhail Repin
- Center for Radiological Research, Columbia University Irving Medical Center, New York, New York
| | - Adayabalam S. Balajee
- Radiation Emergency Assistance Center/Training Site (REAC/TS), Cytogenetic Biodosimetry Laboratory (CBL), Oak Ridge Institute for Science and Education, Oak Ridge Associated Universities, Oak Ridge, Tennessee
| | - Igor Shuryak
- Center for Radiological Research, Columbia University Irving Medical Center, New York, New York
| | - Sergey Pampou
- Columbia Genome Center High-Throughput Screening facility, Columbia University Irving Medical Center, New York, New York
| | - Charles Karan
- Columbia Genome Center High-Throughput Screening facility, Columbia University Irving Medical Center, New York, New York
| | - Yi-Fang Wang
- Department of Radiation Oncology, Columbia University Irving Medical Center, New York, New York
| | - Olga Dona Lemus
- Department of Radiation Oncology, Columbia University Irving Medical Center, New York, New York
| | - Razib Obaid
- Radiological Research Accelerator facility, Columbia University Irving Medical Center, Irvington, New York
- Currently at Stanford Linear Accelerator Center National Accelerator Laboratory, Menlo Park, California
| | - Naresh Deoli
- Radiological Research Accelerator facility, Columbia University Irving Medical Center, Irvington, New York
| | - Cheng-Shie Wuu
- Department of Radiation Oncology, Columbia University Irving Medical Center, New York, New York
| | - David J. Brenner
- Center for Radiological Research, Columbia University Irving Medical Center, New York, New York
| | - Guy Garty
- Center for Radiological Research, Columbia University Irving Medical Center, New York, New York
- Radiological Research Accelerator facility, Columbia University Irving Medical Center, Irvington, New York
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5
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Farkas G, Kocsis ZS, Székely G, Mihály D, Pesznyák C, Pócza T, Major T, Polgár C, Jurányi Z. Quantifying biological effects of radiation from high-energy linear accelerators on lymphocytes. JOURNAL OF RADIATION RESEARCH 2020; 61:73-81. [PMID: 31825080 PMCID: PMC6976737 DOI: 10.1093/jrr/rrz073] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 07/23/2019] [Accepted: 10/15/2019] [Indexed: 06/10/2023]
Abstract
The aim of this study was to investigate the radiobiological effects of flattening filter (FF) and flattening filter-free (FFF) modes of linear electron accelerators and to understand whether there is any difference between the effects of these modes. We evaluated the number of chromosome aberrations following irradiation of lymphocytes from healthy volunteers with X-ray photons at two energy levels, 6 and 10 MV; the dose rate ranged between 5.50 and 23.08 Gy/min and absorbed doses ranged between 0.5 and 8 Gy. A 60Co curve was employed for comparison. Metaphases from the lymphocyte cultures were prepared using standard cytogenetic techniques and chromosome analysis was performed. Our results allow the performance of biodosimetry at higher energies and doses than the currently used reference dosimetry. We observed significant differences in aberration frequencies when different irradiation techniques were used. FFF mode has a higher radiobiological effect than the FF mode. Linear-quadratic dose response calibration curves were constructed and relative biological effectiveness (RBE) values were calculated. Average RBE values using 6 MV (5.50 Gy/min) as a reference radiation were 1.28 for 60Co γ irradiation, 1.11 for 6 FFF and 0.79-0.92 for 10 FFF. Since there are compelling differences between radiation modalities in cases of hypofractionation, these results may be even more important in a therapeutic situation. In case of an accidental overdose of a patient, use of the appropriate calibration curves for biodosimetry are also essential for quantifying the overdose.
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Affiliation(s)
- Gyöngyi Farkas
- National Institute of Oncology, Centre of Radiotherapy, Department of Radiobiology and Diagnostic Onco-Cytogenetics, 1122 Budapest, Ráth György u.7-9
| | - Zsuzsa S Kocsis
- National Institute of Oncology, Centre of Radiotherapy, Department of Radiobiology and Diagnostic Onco-Cytogenetics, 1122 Budapest, Ráth György u.7-9
| | - Gábor Székely
- National Institute of Oncology, Centre of Radiotherapy, Department of Radiobiology and Diagnostic Onco-Cytogenetics, 1122 Budapest, Ráth György u.7-9
| | - Dalma Mihály
- National Institute of Oncology, Centre of Radiotherapy, 1122 Budapest, Ráth György u.7-9
| | - Csilla Pesznyák
- Budapest University of Technological Economics Hungary, National Institute of Oncology, Centre of Radiotherapy, 1122 Budapest, Ráth György u.7-9
| | - Tamás Pócza
- National Institute of Oncology, Centre of Radiotherapy, 1122 Budapest, Ráth György u.7-9
| | - Tibor Major
- National Institute of Oncology, Centre of Radiotherapy, 1122 Budapest, Ráth György u.7-9
| | - Csaba Polgár
- Centre of Radiotherapy, National Institute of Oncology, Budapest, Hungary, Department of Oncology, Semmelweis University, Budapest, Hungary, 1122 Budapest, Ráth György u.7-9
| | - Zsolt Jurányi
- National Institute of Oncology, Centre of Radiotherapy, Department of Radiobiology and Diagnostic Onco-Cytogenetics, 1122 Budapest, Ráth György u.7-9
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Lusiyanti Y, Syaifudin M, Budiantari T, Purnami S, Ramadhani D. Development of Dose-Response Calibration Curve for Dicentric Chromosome Induced by X-Rays. Genome Integr 2019; 10:2. [PMID: 31391915 PMCID: PMC6659407 DOI: 10.4103/genint.genint_1_19] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Chromosome aberration is a biomarker that has been used as a standard tool in biological dosimetry (biodosimetry) of individuals after exposure to ionizing radiation. It is based mainly on the induction of dicentric chromosomes - one of the radiation-induced biological effects, in order to correlate them with radiation dose. In this study, a dose calibration curve for X-rays was generated by using the dicentric assay and by fitting the data to both Chromosomal Aberration Calculation Software and Dose Estimate programs to compare the output of each method. Peripheral blood samples from four nonsmoker healthy donors were irradiated with various doses ranging from 0 to 4 Gy with 250 kV or 122 keV X-rays at a dose rate of 0.17 Gy/min. The irradiated blood was cultured, harvested, and analyzed according to the standard procedure as described by the International Atomic Energy Agency with slight modifications. The dose-response calibration data for dicentrics were fitted with the linear-quadratic model (Ydic = 0.03987D2 + 0.00651D). The dose-response calibration curve obtained in this research was comparable to other estimations with similar radiation quality and dose rates. The results in this research convinced us in sustaining a biodosimetry using a dose-response calibration curve in our laboratory.
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Affiliation(s)
- Yanti Lusiyanti
- Center for Technology of Radiation Safety and Metrology, National Nuclear Energy Agency of Indonesia, Jakarta, Indonesia
| | - Mukh Syaifudin
- Center for Technology of Radiation Safety and Metrology, National Nuclear Energy Agency of Indonesia, Jakarta, Indonesia
| | - Tuti Budiantari
- Center for Technology of Radiation Safety and Metrology, National Nuclear Energy Agency of Indonesia, Jakarta, Indonesia
| | - Sofiati Purnami
- Center for Technology of Radiation Safety and Metrology, National Nuclear Energy Agency of Indonesia, Jakarta, Indonesia
| | - Dwi Ramadhani
- Center for Technology of Radiation Safety and Metrology, National Nuclear Energy Agency of Indonesia, Jakarta, Indonesia
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Royba E, Repin M, Pampou S, Karan C, Brenner DJ, Garty G. RABiT-II-DCA: A Fully-automated Dicentric Chromosome Assay in Multiwell Plates. Radiat Res 2019; 192:311-323. [PMID: 31295087 DOI: 10.1667/rr15266.1] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We developed a fully-automated dicentric chromosome assay (DCA) in multiwell plates. All operations, from sample loading to chromosome scoring, are performed, without human intervention, by the second-generation Rapid Automated Biodosimetry Tool II (RABiT-II) robotic system, a plate imager and custom software, FluorQuantDic. The system requires small volumes of blood (30 µl per individual) to determine radiation dose received as a result of a radiation accident or terrorist attack. To visualize dicentrics in multiwell plates, we implemented a non-classical protocol for centromere FISH staining at 37°C. The RABiT-II performs rapid analysis of chromosomes after extracting them from metaphase cells. With the use of multiwell plates, many samples can be screened at the same time. Thus, the RABiT-II DCA provides an advantage during triage when risk-based stratification and medical management are required for a large population exposed to unknown levels of ionizing radiation.
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Affiliation(s)
- Ekaterina Royba
- Center for Radiological Research.,Columbia Genome Center High-Throughput Screening Facility, Columbia University Medical Center, New York, New York 10032
| | | | - Sergey Pampou
- Columbia Genome Center High-Throughput Screening Facility, Columbia University Medical Center, New York, New York 10032
| | - Charles Karan
- Columbia Genome Center High-Throughput Screening Facility, Columbia University Medical Center, New York, New York 10032
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Jang MA, Han EA, Lee JK, Cho KH, Shin HB, Lee YK. Dose Estimation Curves Following In Vitro X-ray Irradiation Using Blood From Four Healthy Korean Individuals. Ann Lab Med 2018; 39:91-95. [PMID: 30215236 PMCID: PMC6143466 DOI: 10.3343/alm.2019.39.1.91] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 02/14/2018] [Accepted: 07/10/2018] [Indexed: 12/27/2022] Open
Abstract
Cytogenetic dosimetry is useful for evaluating the absorbed dose of ionizing radiation based on analysis of radiation-induced chromosomal aberrations. We created two types of in vitro dose-response calibration curves for dicentric chromosomes (DC) and translocations (TR) induced by X-ray irradiation, using an electron linear accelerator, which is the most frequently used medical device in radiotherapy. We irradiated samples from four healthy Korean individuals and compared the resultant curves between individuals. Aberration yields were studied in a total of 31,800 and 31,725 metaphases for DC and TR, respectively, obtained from 11 X-ray irradiation dose-points (0, 0.05, 0.1, 0.25, 0.5, 0.75, 1, 2, 3, 4, and 5 Gy). The dose-response relationship followed a linear-quadratic equation, Y=C+αD+βD², with the coefficients C=0.0011 for DC and 0.0015 for TR, α=0.0119 for DC and 0.0048 for TR, and β=0.0617 for DC and 0.0237 for TR. Correlation coefficients between irradiation doses and chromosomal aberrations were 0.971 for DC and 0.6 for TR, indicating a very strong and a moderate correlation, respectively. This is the first study implementing cytogenetic dosimetry following exposure to ionizing X-radiation.
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Affiliation(s)
- Mi Ae Jang
- Department of Laboratory Medicine and Genetics, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - Eun Ae Han
- Department of Laboratory Medicine and Genetics, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - Jin Kyung Lee
- Department of Laboratory Medicine, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Kwang Hwan Cho
- Department of Radiation Oncology, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - Hee Bong Shin
- Department of Laboratory Medicine and Genetics, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea.
| | - You Kyoung Lee
- Department of Laboratory Medicine and Genetics, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea.
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9
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Construction of dose response curves up to 6 Gy for Micronucleus and Dicentric Chromosome Aberration Assay with 6 MV X-ray Beam. RADIAT MEAS 2018. [DOI: 10.1016/j.radmeas.2018.05.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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10
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Manivannan B, Kuppusamy T, Venkatesan S, Perumal V. A comparison of estimates of doses to radiotherapy patients obtained with the dicentric chromosome analysis and the γ-H2AX assay: Relevance to radiation triage. Appl Radiat Isot 2017; 131:1-7. [PMID: 29080427 DOI: 10.1016/j.apradiso.2017.10.031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 10/14/2017] [Accepted: 10/14/2017] [Indexed: 11/18/2022]
Abstract
The γ-H2AX assay was investigated as an alternative to the time-consuming dicentric chromosome assay (DCA). Radiation doses to 25 radiotherapy patients were estimated in parallel by DCA and the γ-H2AX assay. The γ-H2AX assay yielded doses in line with the calculated equivalent whole body doses in 92% of the patients, whereas the success rate of DCA was only 76%. The result shows that the γ-H2AX assay can be effectively used as a rapid and more precise alternative to DCA.
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Affiliation(s)
- Bhavani Manivannan
- Department of Human Genetics, College of Biomedical Sciences, Technology and Research, Sri Ramachandra University, Porur, Chennai 600116, Tamil Nadu, India.
| | - Thayalan Kuppusamy
- Dr. Kamakshi Memorial Hospital Pvt. Ltd., Pallikaranai, Chennai 600100, Tamil Nadu, India.
| | - Srinivasan Venkatesan
- Dr. Kamakshi Memorial Hospital Pvt. Ltd., Pallikaranai, Chennai 600100, Tamil Nadu, India.
| | - Venkatachalam Perumal
- Department of Human Genetics, College of Biomedical Sciences, Technology and Research, Sri Ramachandra University, Porur, Chennai 600116, Tamil Nadu, India.
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Kumar AAA, Bakkiam D, Sonwani S, Seenisamy R, Sivasubramanian K, Venkatraman B. Comparison of dicentric dose response curves of 6MV LINAC X-rays and 60Co γ-rays for biodosimetry application. Appl Radiat Isot 2017; 129:124-129. [PMID: 28843160 DOI: 10.1016/j.apradiso.2017.08.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Revised: 06/19/2017] [Accepted: 08/17/2017] [Indexed: 10/19/2022]
Abstract
In vitro Dicentric (DC) dose response curves of 6MV X-rays (3Gy/min) and 60Co γ-rays (0.63Gy/min) were generated and compared (intra-laboratory) to understand their similarities and differences. Human peripheral blood samples exposed to ten different doses (0, 0.05, 0.1, 0.25, 0.5, 1, 2, 3, 4 and 5Gy) of 6MV X-rays and 60Co γ-rays were subjected to Dicentric Chromosome Assay (DCA) and dicentrics, excess acentric fragments (AF) and chromatid breaks (CB) were scored. Totally about 31,553 metaphase spreads were scored for the purpose. Dose response curves of both radiation qualities were almost same except for a 13.8% higher β value for 6MV X-rays. However, blind tests results revealed that both these curves are biologically equivalent and exhibited good dose prediction accuracy for the entire dose range. This demonstrated the feasibility of interchangeable use of these curves in biodosimetry. Consequently it has been suggested that LINAC facilities worldwide can be roped in for biodosimetry capacity augmentation towards managing nuclear emergency situations involving γ-radiation exposures.
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Affiliation(s)
- A Arul Anantha Kumar
- Radiological Safety Division, Indira Gandhi Center for Atomic Research, Kalpakkam, Tamilnadu, India.
| | - D Bakkiam
- Radiological Safety Division, Indira Gandhi Center for Atomic Research, Kalpakkam, Tamilnadu, India
| | - Swetha Sonwani
- Radiological Safety Division, Indira Gandhi Center for Atomic Research, Kalpakkam, Tamilnadu, India
| | - R Seenisamy
- Regional Cancer Center, Jawaharlal Institute of Postgraduate Medical Education & Research, Puducherry, India
| | - K Sivasubramanian
- Radiological Safety Division, Indira Gandhi Center for Atomic Research, Kalpakkam, Tamilnadu, India
| | - B Venkatraman
- Radiological Safety Division, Indira Gandhi Center for Atomic Research, Kalpakkam, Tamilnadu, India
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Achel DG, Serafin AM, Akudugu JM. Flow cytometry-assisted quantification of γH2AX expression has potential as a rapid high-throughput biodosimetry tool. RADIATION AND ENVIRONMENTAL BIOPHYSICS 2016; 55:349-357. [PMID: 27262315 DOI: 10.1007/s00411-016-0654-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Accepted: 05/23/2016] [Indexed: 06/05/2023]
Abstract
Large-scale radiological events require immediate and accurate estimates of doses received by victims, and possibly the first responders, to assist in treatment decisions. Although there are numerous efforts worldwide to develop biodosimetric tools to adequately handle triage needs during radiological incidents, such endeavours do not seem to actively involve sub-Saharan Africa which currently has a significant level of nuclear-related activity. To initiate a similar interest in Africa, ex vivo radiation-induced γH2AX expression in peripheral blood lymphocytes from fourteen healthy donors was assessed using flow cytometry. While the technique shows potential for use as a rapid high-throughput biodosimetric tool for radiation absorbed doses up to 5 Gy, significant inter-individual differences in γH2AX expression emerged. Also, female donors exhibited higher levels of γH2AX expression than their male counterparts. To address these shortcomings, gender-based in-house dose-response curves for γH2AX induction in lymphocytes 2, 4, and 6 h after X-ray irradiation are proposed for the South African population. The obtained results show that γH2AX is a good candidate biomarker for biodosimetry, but might need some refinement and validation through further studies involving a larger cohort of donors.
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Affiliation(s)
- Daniel G Achel
- Division of Radiobiology, Department of Medical Imaging and Clinical Oncology, Faculty of Medicine and Health Sciences, Stellenbosch University, Tygerberg, 7505, South Africa
- Applied Radiation Biology Centre, Radiological and Medical Sciences Research Institute, Ghana Atomic Energy Commission, P.O. Box LG 80, Legon, Accra, Ghana
| | - Antonio M Serafin
- Division of Radiobiology, Department of Medical Imaging and Clinical Oncology, Faculty of Medicine and Health Sciences, Stellenbosch University, Tygerberg, 7505, South Africa
| | - John M Akudugu
- Division of Radiobiology, Department of Medical Imaging and Clinical Oncology, Faculty of Medicine and Health Sciences, Stellenbosch University, Tygerberg, 7505, South Africa.
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