Bonadio RS, Arcanjo AC, Lima EC, Vasconcelos AT, Silva RC, Horst FH, Azevedo RB, Poças-Fonseca MJ, F Longo JP. DNA methylation alterations induced by transient exposure of MCF-7 cells to maghemite nanoparticles.
Nanomedicine (Lond) 2017;
12:2637-2649. [PMID:
29111877 DOI:
10.2217/nnm-2017-0241]
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Abstract
AIM
To evaluate the DNA methylation profile of MCF-7 cells during and after the treatment with maghemite nanoparticles (MNP-CIT).
MATERIALS & METHODS
Noncytotoxic MNP-CIT concentrations and cell morphology were evaluated by standard methods. DNA methylation was assessed by whole genome bisulfite sequencing. DNA methyltransferase (DNMT) genes expression was analyzed by qRT-PCR.
RESULTS
A total of 30 and 60 µgFeml-1 MNP-CIT accumulated in cytoplasm but did not present cytotoxic effects. The overall percentage of DNA methylation was not affected, but 58 gene-associated regions underwent DNA methylation reprogramming, including genes related to cancer onset. DNMT transcript levels were also modulated.
CONCLUSION
Transient exposure to MNP-CIT promoted epigenomic changes and altered the DNMT genes regulation in MCF-7 cells. These events should be considered for biomedical applications.
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