title: [Mutagenesis under the influence of simian vacuolating virus 40 (SV40). I. Induction of chromosome aberrations in Chinese hamster cells during the first days following infection].
abstract: Chromosome aberrations were studied in cultured chinese hamster cells on the 1--4th days after infection with Simian Virus 40. In the first and second mitoses after infection a statistically significant increase of the percentage of aberrant metaphases was observed (up to 22% as compared to 8--10% in intact cells). Already after 3 days following treatment the percentage of aberrant metaphases decreased sharply, reaching the control level. The virus induced a significant increase of the frequency of chromosome and chromatid breaks, as well as the appearance of fragments of an unknown origin. Chromosome breaks were distributed randomly among 5 morphologically distinct chromosome groups, according to the comparative length of respective chromosomes. An increase of the frequency of gaps and coiling deficiencies was also observed in virus-infected cultures. An earlier appearance of the first mitosis was observed in virus-treated cultures. It is suggested that the mutagenic effect of SV40 in the cells studied may be related to mechanisms controlling the integration of viral genomes into the cell chromosomes.
mesh_terms: D000818:Animals; D002869:Chromosome Aberrations; D002999:Clone Cells; D006224:Cricetinae; D013539:Simian virus 40
vernacular_title: Mutagenez pod vozdeĭstviem obez'ian'ego vakuoliziruiushchego virusa 40 (sv40). Soobshchenie I. Induktsiia khromosomnykh aberratsiĭ v kletkakh kitaĭskogo khomiachka v pervye dni posle zarazheniia