engleski

In Vitro Assessment of Asbestos Fibers Genotoxicity

This study was carried out in order to assess the genotoxic effect of in vitro exposure to commercial chrysotile asbestos. V 79 cell line, known as well-established cellular model, was used for detection of asbestos genotoxic potency. Conventional structural chromosomal aberration analysis and sister chromatide exchange (SCE) method were both used for asbestos genotoxicity assessment. Within the experimental protocol applied, V 79 cells were treated with asbestos in concentrations of 100 and 200um/ml F-10 (HAM) media during 90 days, respectively. Analysis of changes in chromosome structure as well as of cell ploidity was performed each tenth day of experimental course, consecutively. Two hundred well spread metaphases were taken into account for chromosomal aberration analysis. Frequency of sister chromatide exchange was observed in 50 cells per sample. The results of cytogenetic tests revealed structural chromosomal damages, SCE-elavation and changes in cell ploidity. Cytogenetic effect of asbestos obviously depended on dose applied and on the period of incubation. The results of this study suggest that significant cytogenetic changes occurring after asbestos treatment might directly or indirectly be a part of the biological events responsible for eliciting asbestos-induced carcinogenesis.

V 79 cell line; chrysotile asbestos; chromosomal aberration; sister chromatide exchange

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