[Effects of oil-refining microbes (genus Acinetobacter) on cytogenetical structures of human lymphocytes in cell cultures].

The objective of this study was to assess ability of oil-refining bacteria Acinetobacter calcoaceticus and A. valentis to induce karyopathological abnormalities and chromosomal aberrations in human lymphocyte cultures. It was found that the cultures infected with A. calcoaceticus showed significantly high frequencies of cytogenetical effects and chromosomal aberrant cells as compared to the intact cultures and cultures infected with A. valentis. The most of chromosomal aberrations, mainly chromatid aberrations, were located in 1 and 2 chromosomes. Moreover, the aberrations were detected in some specific chromosome areas. Abnormalities of mitotic cell division and nucleus morphology were determined in lymphocyte cultures infected with A. calcoaceticus. There were found significantly high frequencies of cells with micronuclei, nucleus protrusions, anaphase or metaphase chromosome and chromosomal fragments lagging as well as multipolar and C-mitoses. Thus, the oil-refining bacteria A. calcoaceticus in contrast to A. valentis demonstrated strong genotoxic effects in human lymphocyte cultures in vitro.

[The role of mutation of gene cyp1A1 and benzapilene in cytogenetic changes of urinary tract epitheliocytes in oil industry workers employed in the oil fields of the North of West Siberia].

The examination of 477 oil industry workers and office personnel (control) employed in the oil fields of the North of Tomsk and Tyumen regions has detected increased number of epithelyocytes with micronuclei and an elevated urine level ofbenzapilene in workers employed in oil production. Especially pronounced changes of the above parameters were observed in men with mutant alleles Val of CYP1A1 gene. An enhanced mutation process in oil production workers may be due to a resultant action of different factors on human genome. Involved may be both mutagens and factors of comutagenic nature. The results obtained in this study suggest a conclusion about urgent need of introduction of new scientifically validated criteria of selection of personnel for oil production in the North of the West Siberia. Health examination of the applicants must include genotyping.

[Therapeutic effect of mineral water of the Belokurikha spa resort on the level of antinuclear antibodies and chromosomal aberrations in synovial cells of patients with osteoarthrosis].

The objective of this study was chromosomal analysis and measurement of anti-nuclear antibody level in synovial cells of 28 patients aged between 35 and 50 years with knee joint osteoarthrosis before and after radon therapy at an equivalent doe of 280 mSv per treatment course. It was shown that the presence of osteoarthrosis was associated with a rise in the number of synoviocytes characterized by cytogenetic defects in the form of various chromosomal aberrations the frequency of which positively correlated with the number of anti-nuclear antibodies. Radon therapy brought about a decreases in the titers of antinuclear antibodies in synovial cells and the number of chromosomal aberrations in their nuclear apparatus. These changes were accompanied by the enhancement of mitotic activity of synoviocytes, stimulation of protein synthesis in these cells, and activation of proliferative processes in the synovial medium of the joints.

[Complex study of various pathogenetic and physiologic parameters of the health status of watchmen in the oil industry]. / Kompleksnoe izuchenie nekotorykh tsitogeneticheskikh i fiziologicheskikh parametrov zdorov'ia u vakhtovykh rabochikh-neftianikov.

Complex examination of oil industry workers and those engaged in nonproductive area (control group) was undertaken. It was established that in both groups there were persons with a high level of cells with cytogenetic disturbances (micronuclear test). However, as opposed to control group, oil industry workers had higher levels of systolic and pulse pressure. Besides it was shown that after 12 hours of work at an oil field under winter conditions in the north area of the Tomsk Region they had higher body temperature. It appeared that these persons primarily had the longest term of professional service. Further examination of persons with especially high level of micronuclei cells showed that they had elevated lymphocyte amount with chromosome impairments and some parameters of T- and B-immunoreactivity, phagocytosis and activity of normal killer cells were changed.

[Antimutagenic effectiveness of pyrimidine derivatives in lesions of the bone marrow cell chromosome apparatus in mice infected with measles or poliomyelitis viruses]. / Amtimutagennaia éffektivnost' pirimidinovykh proizvodnykh pri porazheniiakh khromosomnogo apparata kletok kostnogo mozga myshei, zarazhennykh virusami kori i poliomielita.

It is determined that the number of marrow cells with cytogenetic disturbances grows in mice infected with measles or polymyelitis viruses. The level of marrow cells with disturbances is much lower in the mice fed with methyluracilum or pentoxylum before infection. The level of deteriorated cells also decreases when the mice were fed with the mentioned drug after infection. In an analogous experiment with polymyelitis viruses the antimutagenic effect was not determined.