Stable and unstable chromosome aberrations in humans and other mammals in relation to the problems of biological dosimetry

Literature data of long-term cytogenetic follow-up of people exposed to radiation as a results of different radiation accidents are considered for the purpose of discussing of some problems of biological dosimetry. The results obtained for mammals are also presented. Of particular interest is a decr...

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Bibliographic Details
Published inRadiat͡s︡ionnai͡a︡ biologii͡a︡, radioėkologii͡a Vol. 48; no. 1; p. 14
Main Author Elisova, T V
Format Journal Article
LanguageRussian
Published Russia (Federation) 01.01.2008
Subjects
Animals
Chromosome Aberrations - radiation effects
Chromosome Painting
Cytogenetic Analysis
Dose-Response Relationship, Radiation
Gamma Rays
Humans
In Situ Hybridization, Fluorescence
Radiation Dosage
Radiation Injuries - genetics
Radiation, Ionizing
Radioactive Hazard Release
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Summary:Literature data of long-term cytogenetic follow-up of people exposed to radiation as a results of different radiation accidents are considered for the purpose of discussing of some problems of biological dosimetry. The results obtained for mammals are also presented. Of particular interest is a decrease in the level of dicentrics and symmetrical translocations in peripheral blood lymphocytes with the time after acute exposure depending on the dose of irradiation. The frequency of dicentrics decreases in accordance to the exponential law passing the fast and slow phases of elimination. In different radiation situations the values of the parameter which defines the half-life period of lymphocytes characterizing 50% reduction of cells with dicentrics markedly vary. However a general regularity is a decrease in the parameter value as the exposure dose increases. The level of stable translocations estimates by the EISH method remains relatively constant at doses below 1-2 Gy. At higher doses their level in peripheral blood lymphocytes declines with time due to which the retrospective dose appears to be underestimated. The reasons of such regularity, the role of various factors affecting the scoring of translocations, criteria of analysis of the given chromosome aberrations are discussed in the context of common agreements between leading European laboratories on the use of FISH for improving biological dosimetric estimates.
ISSN:0869-8031