Mutagen influence with different mechanisms of action on DNA global methylation in human whole-blood lymphocytes in vitro

Mutagen influence with different mechanisms of action on DNA global methylation in human... 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Genetics Springer Journals

Mutagen influence with different mechanisms of action on DNA global methylation in human whole-blood lymphocytes in vitro

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Publisher
Springer Journals
Copyright
Copyright © 2013 by Pleiades Publishing, Ltd.
Subject
Biomedicine; Human Genetics; Animal Genetics and Genomics; Microbial Genetics and Genomics
ISSN
1022-7954
eISSN
1608-3369
D.O.I.
10.1134/S1022795413060124
Publisher site
See Article on Publisher Site

Abstract

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.

Journal

Russian Journal of GeneticsSpringer Journals

Published: Jul 12, 2013

References

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