PMID- 25813720 OWN - NLM STAT- MEDLINE DCOM- 20150526 LR - 20150327 IS - 1879-3592 (Electronic) IS - 1383-5718 (Linking) VI - 779 DP - 2015 Feb TI - Continuous cytogenetic follow-up, over 5 years, of three individuals accidentally irradiated by a cobalt-60 source. PG - 1-4 LID - S1383-5718(15)00032-7 [pii] LID - 10.1016/j.mrgentox.2015.01.009 [doi] AB - A cobalt-60 irradiation accident occurred in Shanxi, China, on April 11, 2008. Five people were exposed to total-body irradiation ranging from 1.7 to 14.5 Gy. Two victims died post-irradiation, due to acute intestinal radiation sickness (at 62 days) and tuberculosis (at 1.5 year). The other three victims received medical follow-ups and were monitored for 5 years with multiple cytogenetic analyses. Unstable chromosome aberrations, including dicentric and centric rings (dic+r) and the micronucleus frequency in binucleated lymphocytes, were monitored. In addition, G-banding karyotype and fluorescence in situ hybridization (FISH) methods were used to analyze translocations, for exploring chromosome stability and for retrospective dosimetry. The results show that unstable chromosome aberrations (dic+r) declined each year, dropping to about 20-40% of initial levels by the 5th year. A similar trend was observed for the micronucleus frequency. Our results show that the translocation frequencies of the three victims, detected by G-banding karyotype, remained stable for the 5 years. Five years after irradiation, the translocation rates of the three victims (G-banding and FISH analyses) were similar. The retrospective estimated doses, reconstructed based on the translocation frequencies, were consistent with the biological doses estimated at the first day post-irradiation using dic+r. The results of this study indicate that chromosome translocation frequencies can be used as a biological dosimeter and are an excellent index for dose reconstruction. CI - Copyright (c) 2015 Elsevier B.V. All rights reserved. FAU - Wang, Zhi-Dong AU - Wang ZD AD - Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing 100850, China. FAU - Zhang, Xue-Qing AU - Zhang XQ AD - Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing 100850, China. FAU - Du, Jie AU - Du J AD - Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing 100850, China. FAU - Lu, Xue AU - Lu X AD - China CDC Key Laboratory of Radiological Protection and Nuclear Emergency, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China. FAU - Wang, Yuan AU - Wang Y AD - Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing 100850, China. FAU - Tian, Rong AU - Tian R AD - Affiliated Hospital of China Institute for Radiation Protection, Taiyuan, Shanxi Province 030006, China. FAU - Liu, Qing-Jie AU - Liu QJ AD - China CDC Key Laboratory of Radiological Protection and Nuclear Emergency, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China. Electronic address: qjliu@nirp.cn. FAU - Chen, Ying AU - Chen Y AD - Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing 100850, China. Electronic address: yingchen_29@163.com. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20150129 PL - Netherlands TA - Mutat Res Genet Toxicol Environ Mutagen JT - Mutation research. Genetic toxicology and environmental mutagenesis JID - 101632149 RN - 0 (Cobalt Radioisotopes) SB - IM MH - Adult MH - China MH - Chromosome Aberrations/radiation effects MH - Chromosome Banding MH - Cobalt Radioisotopes/*blood/*toxicity MH - Dose-Response Relationship, Radiation MH - Follow-Up Studies MH - Humans MH - In Situ Hybridization, Fluorescence MH - Karyotyping MH - Lymphocytes/radiation effects MH - Male MH - Radiation Injuries/pathology MH - *Radioactive Hazard Release MH - Translocation, Genetic OTO - NOTNLM OT - Biological dose OT - Chromosomal aberration OT - Dose reconstruction OT - Follow-up observation OT - Radiation accident EDAT- 2015/03/31 06:00 MHDA- 2015/05/27 06:00 CRDT- 2015/03/28 06:00 PHST- 2014/12/12 00:00 [received] PHST- 2015/01/26 00:00 [revised] PHST- 2015/01/28 00:00 [accepted] PHST- 2015/03/28 06:00 [entrez] PHST- 2015/03/31 06:00 [pubmed] PHST- 2015/05/27 06:00 [medline] AID - S1383-5718(15)00032-7 [pii] AID - 10.1016/j.mrgentox.2015.01.009 [doi] PST - ppublish SO - Mutat Res Genet Toxicol Environ Mutagen. 2015 Feb;779:1-4. doi: 10.1016/j.mrgentox.2015.01.009. Epub 2015 Jan 29.