Genome-wide DNA hypermethylation induced by 3'-azido-3'-deoxythymidine (AZT) has been suggested to be involved in the development of AZT resistance. We used a CD4 T-lymphoblastoid CEM line and its AZT-resistant MT500 variant with reduced thymidine kinase activity, Evaluation of total DNA methylation, after AZT treatment, failed to show an increase in the 5-methylcytosine level in both parental and AZT-resistant cells, The effect was instead observed at a more specific gene level, on the three HpaII sites present in exon 1 of the human thymidine kinase gene, These results suggest that AZT treatment can induce site-specific hypermethylation, even in the absence of a more general DNA hypermethylating effect.

AZT-induced hypermethylation of human thymidine kinase gene in the absence of total DNA hypermethylation / Lucarelli, Marco; Palitti, Franco; Carotti, Daniela; Maurizio, Cianfriglia; Claudia, Signoretti; Bozzi, Argante; Strom, Roberto. - In: FEBS LETTERS. - ISSN 0014-5793. - STAMPA. - 396:2-3(1996), pp. 323-326. [10.1016/0014-5793(96)01124-6]

AZT-induced hypermethylation of human thymidine kinase gene in the absence of total DNA hypermethylation

LUCARELLI, Marco;PALITTI, Franco;CAROTTI, Daniela;BOZZI, Argante;STROM, Roberto
1996

Abstract

Genome-wide DNA hypermethylation induced by 3'-azido-3'-deoxythymidine (AZT) has been suggested to be involved in the development of AZT resistance. We used a CD4 T-lymphoblastoid CEM line and its AZT-resistant MT500 variant with reduced thymidine kinase activity, Evaluation of total DNA methylation, after AZT treatment, failed to show an increase in the 5-methylcytosine level in both parental and AZT-resistant cells, The effect was instead observed at a more specific gene level, on the three HpaII sites present in exon 1 of the human thymidine kinase gene, These results suggest that AZT treatment can induce site-specific hypermethylation, even in the absence of a more general DNA hypermethylating effect.
1996
3′-azido-3′-deoxythymidine; dna methylation; drug resistance; hpaii/pcr assay; thymidine kinase gene
01 Pubblicazione su rivista::01a Articolo in rivista
AZT-induced hypermethylation of human thymidine kinase gene in the absence of total DNA hypermethylation / Lucarelli, Marco; Palitti, Franco; Carotti, Daniela; Maurizio, Cianfriglia; Claudia, Signoretti; Bozzi, Argante; Strom, Roberto. - In: FEBS LETTERS. - ISSN 0014-5793. - STAMPA. - 396:2-3(1996), pp. 323-326. [10.1016/0014-5793(96)01124-6]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/244860
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