The Dose Response of Chromosome Aberrations in Human Lymphocytes Induced In Vitro by Very Low-Dose γ Rays

Toshiyasu Iwasaki; Yoshio Takashima; Toshikazu Suzuki; Mitsuaki A. Yoshida; Isamu Hayata

doi:10.1667/RR2097.1

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Toshiyasu Iwasaki,¹ Yoshio Takashima,² Toshikazu Suzuki,² Mitsuaki A. Yoshida,² Isamu Hayata^1,2

¹aCentral Research Institute of Electric Power Industry (CRIEPI), 2-11-1, Iwadokita, Komae-shi, Tokyo
²bNational Institute of Radiological Sciences (NIRS), 4-9-1, Anagawa, Inage-ku, Chiba-shi, 263-8555 J

Abstract

This paper considers the dose–effect relationship for unstable chromosome aberration yields in human lymphocytes in very low-dose range. Data are presented for ⁶⁰Co γ-ray doses of 0, 10, 20, 40 and 1000 mGy. More than 5,000 metaphases were scored for each data point at the very low doses, and each cell was double-checked using a semi-automated metaphase finding/relocation system. Aberration yields of dicentrics plus centric rings followed an excellent linear dose response down to zero dose; the yields were significantly above the control frequency from 20 mGy.

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Toshiyasu Iwasaki, Yoshio Takashima, Toshikazu Suzuki, Mitsuaki A. Yoshida, and Isamu Hayata "The Dose Response of Chromosome Aberrations in Human Lymphocytes Induced In Vitro by Very Low-Dose γ Rays," Radiation Research 175(2), 208-213, (4 November 2010). https://doi.org/10.1667/RR2097.1

Received: 25 November 2009; Accepted: 1 August 2010; Published: 4 November 2010

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