Data that support the evidence of mutagens known to cause epigenetic abnormalities that could potentially result in genomic instability and the development of cancer rather than to modifications in the human genome at the gene and chromosomal levels only. The level of global methylation in human lymphocytes in vitro caused by exposure to two mutagens with different mechanisms of action, i.e., dioxidine and methyl methanesulphonate (MMS), was demonstrated in the present study. Global methylation was assessed by methyl-sensitive comet assay. An increase in the level of global methylation to 45.64% was revealed during culturing with dioxidine in a concentration of 0.01 mg/mL (p < 0.001), while the addition of dioxidine in a concentration of 0.1 mg/mL resulted in a decreased level of methylation up to 42.31% (p < 0.001). The addition of MMS in concentrations of 0.0025 and 0.01 mg/mL resulted in minor but significant modifications (p < 0.05) of the global methylation level ranged within natural variations in global methylation. Accordingly, the addition of dioxidine in the concentration of 0.1 mg/mL might cause genomic instability and might be considered a potential carcinogen.
Russian Journal of Genetics – Springer Journals
Published: Jul 12, 2013
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