title: [Multiaberrant cell formation caused by exposure to internal densely-ionizing irradiation].
abstract: The origin of multiaberrant cells (MACs) was studied by comparing the structure and intensity of chromosome damage in peripheral blood lymphocytes of two groups of people: workers of Siberian Chemical Plant differing in the content of plutonium-239 in their bodies, and inhabitants of a non-polluted settlement (control group). Plutonium-239 is known to be a long-lived densely-ionizing source of alpha-radiation with high linear energy delivery; therefore, it has a stronger effect on cell hereditary structures than gamma-rays. In persons with the content of plutonium-239 higher than 13 nCu, the frequency of MAC was 0.105% which at least tenfold exceeds the spontaneous level. The chromosome-type aberrations that are usually induced by ionizing radiation predominated in MACs. Our results suggest that MAC formation may be caused by internal body irradiation with the incorporated sources of densely-ionizing radiation.
authors.forename: N A
authors.initials: NA
authors.lastname: Popova
authors.forename: L P
authors.initials: LP
authors.lastname: Nazarenko
authors.forename: S A
authors.initials: SA
authors.lastname: Nazarenko
mesh_terms: D000328:Adult; D000512:Alpha Particles / Q000009:adverse effects*; D002617:Chemical Industry; D002869:Chromosome Aberrations / Q000528:radiation effects*; D005260:Female; D005720:Gamma Rays / Q000009:adverse effects*; D006801:Humans; D008214:Lymphocytes / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D011005:Plutonium
chemical_list: D011005:Plutonium