Chemosensitivity to triazene compounds and O6-alkylguanine-DNA alkyltransferase levels: Studies with blasts of leukaemic patients
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چکیده
منابع مشابه
Use of oligodeoxynucleotides containing O6-alkylguanine for the assay of O6-alkylguanine-DNA-alkyltransferase activity.
A sensitive assay procedure was developed for the measurement of the activity of mammalian O6-alkylguanine-DNA-alkyltransferase. The procedure utilized oligodeoxynucleotides containing O6-methylguanine as substrates for the reaction. The oligodeoxynucleotides were end labeled with 32P by the reaction with polynucleotide kinase and [gamma-32P]ATP and allowed to react with organ or cell extracts ...
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O(6)-Alkylguanine-DNA alkyltransferase (ATase) confers resistance to many of the biological effects of certain classes of alkylating agents by repairing the DNA lesions responsible. The role of ATase in the mutagenic and toxic effects of the carcinogenic and antitumour alkylating agents are of interest in relation to the prevention and treatment of cancer in man. In this commentary we specifica...
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Promoter hypermethylation of the DNA repair protein O(6)-alkylguanine-DNA alkyltransferase (AGT) has been associated with an enhanced response to chloroethylating and methylating agents in patients with malignant glioma. The purpose of this study was to compare three distinct yet related indices for measuring AGT to determine if these assays could be used interchangeably when AGT status is to b...
متن کاملO6-alkylguanine-DNA alkyltransferase in the chick embryo during development.
In the whole embryo, O6-alkylguanine-DNA alkyltransferase (AT) activity increased until day 9 of development and declined sharply after day 13. AT activity of the liver was greatest between day 12 and day 20 and decreased fast after hatching. In the brain, AT activities reached a maximum at day 17 and 18 and declined sharply after hatching. At two developmental stages with different AT activiti...
متن کاملO6 alkylguanine-DNA alkyltransferase activity in human myeloid cells.
The association between alkylating agent exposure and acute nonlymphocytic leukemia in humans indicates that myeloid cells may be particularly susceptible to mutagenic damage. Alkylating agent mutagenesis is frequently mediated through formation and persistence of a particular DNA base adduct, O6alkylguanine, which preferentially mispairs with thymine rather than cytosine, leading to point muta...
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ژورنال
عنوان ژورنال: Annals of Oncology
سال: 1995
ISSN: 0923-7534
DOI: 10.1093/oxfordjournals.annonc.a059189