The mechanisms of lethal action of arabinosyl cytosine (araC) and arabinosyl adenine (araA)

作者: Seymour S. Cohen

DOI: 10.1002/1097-0142(197707)40:1+<509::AID-CNCR2820400717>3.0.CO;2-8

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摘要: Certain D-arabinosyl nucleosides, notably arabinosyl cytosine (araC) and adenine (araA), are useful in the treatment of certain leukemias some DNA virus infections, respectively. The compounds lethal to animal cells bacteria. Despite extensive deamination, parent nucleosides transported within sensitive phosphorylated mono-, di- triphosphates. AraCTP araATP good specific competitive inhibitors tumor cell virus-induced polymerases, competing with dCTP dATP In addition markedly inhibiting synthesis, aranucleotides enter newly formed internucleotide linkage. Sensitivity appears correlate relative ratio formation triphosphate via a nucleoside kinase degradation deaminase. Inhibition deaminase increases aranucleoside leukemic or virus-infected toxicity nucleosides. Combinations deaminases being explored clinical situations. addition, slow penetration into has been observed these 5'-phosphates antiviral agents, e.g., against herpes herpetic kiratitis.

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