PMID: 25764816Mar 15, 2015Paper

Influence of chronic irradiation on the distribution of blood lymphocyte subpopulations among professionals of the atomic industry

Radiatsionnaia biologiia, radioecologiia
E I SelivanovaA S Saenko

Abstract

The aim of the study was to investigate the effects of chronic exposure to ionizing radiation on the cellular immunity of employees of the nuclear industry. Peripheral blood samples were studied in 195 employees of Physics and Power Engineering Institute (PPEI, Obninsk), who professionallycontacted with sources ofionizing radiation and were under individual dosimetric control. The median cumulative dose was 61.2 mSv, the average duration of work at the enterprise -27 ± 5 years. The control group consisted of 57 healthy individuals of a similar age and sex who did not have contact with sources of radiation. Indicators of the cellular immunity were determined by flow cytometry. Comparison of a cell-mediated immunity was conducted separately in the two age groups (20-40 and 41-70 years). The significant reduction inthe relative content of CD4+CD8 T-helper cells and the increase in the relative content of CD3-CD16, CD56+ NK-cells were found in both age groups of the PPEI employees in comparison with the age-matched control groups (p < 0.05). Separate analysis of the results in the low dose group (up to 50 mSv) demonstrated reducing the relative content of T-helper cells and increasing the proportion of NK-cells (as in the analysis ...Continue Reading

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