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- W1571539585 abstract "The relationship between antineoplastic activity of 5-aza-2'-deoxycytidine (5-aza-dCyd) in mice with L1210 leukemia and inhibition of DNA methylation was investigated. BALB/c X DBA/2 F1 mice with L1210 leukemia were given a 15-hr i.v. infusion of 5-aza-dCyd at a total dose ranging from 0.5 mg/kg (weak antineoplastic effect) to 22 mg/kg (very potent antineoplastic effect). The DNA of L1210 leukemia cells was isolated from 5-aza-dCyd-treated mice and tested for its ability to accept methyl groups from S-adenosyl-L-methionine in a reaction catalyzed by DNA methyltransferase. The methyl-accepting ability of leukemia cell DNA was found to be dependent on the dose of 5-aza-dCyd, suggesting that this therapy induced significant changes in the level of methylation of the DNA. At the start of the 5-aza-dCyd infusion, mice were given i.p. injections of [6-3H]uridine, and the DNA of the L1210 leukemia cells was isolated at the end of therapy. Analysis of the labeled pyrimidine bases showed that 5-aza-dCyd produced a dose-dependent reduction in the 5-methylcytosine content of the DNA. Thus, there appears to be a correlation between the antileukemic activity of 5-aza-dCyd and its ability to inhibit DNA methylation." @default.
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- W1571539585 date "1983-08-01" @default.
- W1571539585 modified "2023-09-23" @default.
- W1571539585 title "Inhibition of DNA methylation in L1210 leukemic cells by 5-aza-2'-deoxycytidine as a possible mechanism of chemotherapeutic action." @default.
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