Biodosimetry results obtained by various cytogenetic methods and electron spin resonance spectrometry among inhabitants of a radionuclide contaminated area around the siberian chemical plant (Tomsk-7).
On April 6, 1993, near the town of Tomsk (Russia) there was an accident at the Siberian Chemical Plant (SCP) which resulted in extensive contamination of an area of 250 km(2) to the north of SCP with long-lived radionuclides such as (239)Pu, (137)Cs and (90)Sr. Cytogenetic methods and electron spin resonance (ESR) spectrometry of tooth enamel were used to estimate the radiation doses received by the population. The ESR signal intensity and the chromosomal aberration frequency in lymphocytes of the tooth donors showed a good correlation. The data showed that 15% of the inhabitants of the Samus settlement received a radiation dose >90 cGy. The exceptions were results of an examination of fishermen, where ESR gave high values (80-210 cGy) but both the chromosome assay and the cytokinesis block micronucleus method gave lower ones (8-52 cGy). A large increase in chromosome damage was observed in people born between 1961 and 1969. It was found that during these years several serious accidents at the Siberian Chemical Plant had occurred causing radiation pollution of the area. The number of cells with chromosome aberrations was significantly less among the people arriving in Samus after 1980. We found good correlations between the level of carotene consumption and a decrease in frequency of both micronuclei in binucleated lymphocytes (r = 0.68, P < 0.01) and chromatid aberrations (r = 0.61, P < 0.01) among the inhabitants. We also examined the inhabitants of Samus for opisthorchis infection, which was present in 30% of the population. The Samus inhabitants affected by Opisthorchis felineus showed significantly increased levels of micronuclei in binucleated lymphocytes and chromatid aberrations as compared with the controls.
Ilyinskikh
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Siberian Medical University, 634050 Tomsk-50, a/ya 808, Russia, Department of Radiation and Chemical Mutagenesis, Leiden University, Leiden, The Netherlands. root@ecogen.tomsk.su
Ilyinskikh
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IN
Porovskiy
V A
VA
Natarajan
A T
AT
Suskov
I I
II
Smirenniy
L N
LN
Ilyinskikh
E N
EN
D000328:Adult; D000818:Animals; D002675:Child, Preschool; D002869:Chromosome Aberrations; D003582:Cytogenetics / Q000379:methods; D003743:Dental Enamel / Q000528:radiation effects; D004307:Dose-Response Relationship, Radiation; D004578:Electron Spin Resonance Spectroscopy; D004781:Environmental Exposure / Q000009:adverse effects*; D005260:Female; D006801:Humans; D007223:Infant; D008214:Lymphocytes / Q000166:cytology / Q000378:metabolism / Q000528:radiation effects; D008297:Male; D048629:Micronuclei, Chromosome-Defective / Q000528:radiation effects; D015162:Micronucleus Tests; D008875:Middle Aged; D016273:Occupational Exposure / Q000009:adverse effects; D009889:Opisthorchiasis; D011829:Radiation Dosage; D018788:Radioactive Hazard Release; D011848:Radioactive Pollutants / Q000009:adverse effects*; D011874:Radiometry / Q000379:methods*; D012189:Retrospective Studies; D012800:Siberia; D012907:Smoking; D013223:Statistics as Topic; D011795:Surveys and Questionnaires; D014875:Water Pollutants, Radioactive / Q000009:adverse effects
D011848:Radioactive Pollutants; D014875:Water Pollutants, Radioactive