PMID: 11320151Apr 26, 2001Paper

Dynamics of changes in micronucleus frequencies in subjects post cessation of chronic low-dose radiation exposure

Mutagenesis
M H TsaiW P Chang

Abstract

To assess DNA damage remaining in peripheral lymphocytes, 48 individuals were evaluated twice for lymphocyte micronucleus frequencies by the cytokinesis-blocking cytochalasin B (CBMN) analysis post relocation from radio-contaminated apartments after various periods of time. The frequencies of CBMN at the first evaluation were significantly higher than those at the second examination (Chang et al., 1999c). These individuals were categorized into three groups: those with cumulative exposure of >300 mSv (defined as high exposure, HDose), those with 100-300 mSv (MDose) and those with <100 mSv (LDose). Using the Poisson mixed-effect model (Little et al., 1996), the estimated mean CBMN frequencies ( per thousand) for individuals in HDose, MDose and LDose exposure categories when they had only recently relocated were 21.8, 17.6 and 15.4, respectively. The estimated mean duration post relocation for the CBMN frequencies of these individuals to reduce to 10.2, the second CBMN frequency, on average, was 47.5, 37.2 and 28.3 months in the three exposure groups, respectively. The rates of change in CBMN frequencies were shown to be significantly higher in the HDose group than in the MDose and LDose groups. The results suggested a characteri...Continue Reading

Citations

Dec 4, 2003·Mutation Research·Monica NeriStefano Bonassi
Mar 1, 2007·Environmental Toxicology and Pharmacology·Francisca L DiasMarly A S Balarin
Mar 15, 2013·International Journal of Radiation Biology·Pimei Nancy YenI-Feng Lin
Nov 3, 2020·International Journal of Radiation Biology·Valerie Swee Ting GohTomisato Miura

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