PMID- 35913889 OWN - NLM STAT- MEDLINE DCOM- 20221014 LR - 20221019 IS - 1938-5404 (Electronic) IS - 0033-7587 (Linking) VI - 198 IP - 4 DP - 2022 Oct 1 TI - Chromosomal Aberrations in Large Japanese Field Mice (Apodemus speciosus) Captured in Various Periods after Fukushima Daiichi Nuclear Power Plant Accident. PG - 347-356 LID - 10.1667/RADE-21-00162.1 [doi] AB - After the Fukushima Daiichi Nuclear Power Plant accident, we studied the chromosomal aberrations (dicentrics and translocations) in the splenic lymphocytes of wild mice inhabiting Fukushima prefecture. Here, we report the frequencies of chromosomal aberrations in large Japanese field mice (Apodemus speciosus) captured from 2012 to 2016 in a heavily contaminated area. The chromosomal aberrations were detected using newly developed 4-color FISH (fluorescence in situ hybridization) with A. speciosus chromosome 1-, 3-, 4- and 5-specific painting probes. The frequencies of chromosomal aberrations in mice captured in July 2012 and October 2014 were significantly higher than that in the mice inhabiting the non-contaminated control area; however, the frequency of chromosomal aberrations in mice captured in January 2016 was not. The frequency of chromosomal aberrations in individual mice tended to increase with certain dose rates and accumulated doses. Regression tree analyses suggested increasing chromosomal aberration rate in mice exposed to chronic radiation at dose rates of more than 1.1 mGy day-1 and at accumulated doses of more than 200 mGy. It is concluded that ambient dose rates in the most severely contaminated area of Fukushima prefecture and radiation doses to wild mice inhabiting this area decrease with time; consequently, chromosomal aberrations induced by radiation have not been detected 5 years after the accident. CI - (c)2022 by Radiation Research Society. All rights of reproduction in any form reserved. FAU - Shiomi, Naoko AU - Shiomi N AD - Department of Radioecology and Fukushima Project, National Institute of Radiological Sciences, Quantum Medical Science Directorate, National Institute for Quantum and Radiological Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan. FAU - Takahashi, Hiroyuki AU - Takahashi H AD - Tokyo Nuclear Services Co., Ltd. 1-3-5 Taito, Taito-ku, Tokyo 110-0016, Japan. FAU - Watanabe, Yoshito AU - Watanabe Y AD - Department of Radioecology and Fukushima Project, National Institute of Radiological Sciences, Quantum Medical Science Directorate, National Institute for Quantum and Radiological Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan. FAU - Fuma, Shoichi AU - Fuma S AD - Department of Radioecology and Fukushima Project, National Institute of Radiological Sciences, Quantum Medical Science Directorate, National Institute for Quantum and Radiological Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan. FAU - Aoki, Masanari AU - Aoki M AD - Japan Wildlife Research Center, 3-3-7 Kotobashi, Sumida-ku, Tokyo 130-8606, Japan. FAU - Kubota, Masahide AU - Kubota M AD - Japan Wildlife Research Center, 3-3-7 Kotobashi, Sumida-ku, Tokyo 130-8606, Japan. FAU - Furuhata, Yoshiaki AU - Furuhata Y AD - Japan Wildlife Research Center, 3-3-7 Kotobashi, Sumida-ku, Tokyo 130-8606, Japan. FAU - Morosawa, Takahiro AU - Morosawa T AD - Japan Wildlife Research Center, 3-3-7 Kotobashi, Sumida-ku, Tokyo 130-8606, Japan. FAU - Kubota, Yoshihisa AU - Kubota Y AD - Department of Radioecology and Fukushima Project, National Institute of Radiological Sciences, Quantum Medical Science Directorate, National Institute for Quantum and Radiological Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Radiat Res JT - Radiation research JID - 0401245 SB - IM MH - Animals MH - Chromosome Aberrations MH - *Fukushima Nuclear Accident MH - In Situ Hybridization, Fluorescence MH - Japan MH - Mice MH - Murinae/genetics MH - Nuclear Power Plants MH - Radiation Dosage EDAT- 2022/08/02 06:00 MHDA- 2022/10/15 06:00 CRDT- 2022/08/01 13:12 PHST- 2021/08/18 00:00 [received] PHST- 2022/06/23 00:00 [accepted] PHST- 2022/08/02 06:00 [pubmed] PHST- 2022/10/15 06:00 [medline] PHST- 2022/08/01 13:12 [entrez] AID - 484477 [pii] AID - 10.1667/RADE-21-00162.1 [doi] PST - ppublish SO - Radiat Res. 2022 Oct 1;198(4):347-356. doi: 10.1667/RADE-21-00162.1.