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  • Title: Recombinant Methioninase as a DNA Demethylation Agent.
    Author: Hoffman RM, Machover D.
    Journal: Methods Mol Biol; 2019; 1866():279-284. PubMed ID: 30725424.
    Abstract:
    This chapter reviews the effect of methionine (MET) restriction, via treatment with recombinant methioninase (rMETase), on DNA methylation of cancer cells. CCRF-CEM human cancer cells were treated with rMETase under subcytotoxic conditions. The rMETase-treated cells contained significantly lower levels of genomic methylated DNA than did untreated control cells. DNA methylation was measured by incorporation of the methyl group of [3H]methyl-S-adenosylmethionine into DNA and by methylation-sensitive arbitrarily-primed PCR. DNA hypomethylation effected by rMETase was of similar extent to that effected by treatment of the cells with the DNA methyltransferase inhibitor 5-azacytidine.
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