Article
<i>O</i> 6 <i>-Methylguanine-DNA Methyltransferase</i> Gene: Epigenetic Silencing and Prognostic Value in Head and Neck Squamous Cell Carcinoma
1 Jun 2004
Abstract excerpt
BACKGROUND: Alkylating N-nitroso compounds can interact directly with DNA, forming O(6)-alkylguanine, a DNA adduct proved to be mutagenic and carcinogenic if not sufficiently repaired. A specific DNA repair enzyme, O(6)-methylguanine-DNA methyltransferase (MGMT), can remove the alkyl group from the O(6)-position of the guanine, thereby preventing its mutagenic and carcinogenic effects. Inactivation of the MGMT...
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