The incidence of unstable chromosome aberrations in peripheral blood lymphocytes from unirradiated and occupationally exposed people

David Lloyd, R. J. Purrott, E. J. Reeder

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Abstract

Peripheral blood lymphocytes from unirradiated control subjects and workers exposed within permitted limits to γ-radiation, have been examined for the incidence of dicentric and acentric chromosome aberrations. The results are compared with a review of data published elsewhere. Background levels show inter-laboratory variation and possible reasons for this are discussed. By combining the present data with those from the literature the spontaneous incidence of dicentric aberrations is approx. 0.55 × 10−3 and for acentrics is 3.7 × 10−3. In occupationally exposed subjects a significantly higher incidence of aberrations was found. When allowance was made for the turnover of lymphocytes for the period over which each man had worked with radiation a linear dose-effect relationship was apparent. The incidence of dicentrics was 2.22 ± 0.94 × 10−4 rad−1 and for all unstable aberrations 8.24 ± 2.8 × 10−4 rad−1. These are in reasonable agreement with dose-response data obtained in vitro.

Original languageEnglish
Pages (from-to)523-532
Number of pages10
JournalMutation Research - Fundamental and Molecular Mechanisms of Mutagenesis
Volume72
Issue number3
DOIs
Publication statusPublished - 1980

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