We have demonstrated that Ara-C incorporates in leukemic cell DNA and that the extent of this incorporation correlates significantly with loss of clonogenic survival. This relationship between formation of (Ara-C)DNA and cytotoxicity is also obtained in the presence of modulating agents such as thym
Cellular aspects of the action of cytosine arabinoside
โ Scribed by Valeriote, Fred
- Publisher
- John Wiley and Sons
- Year
- 1982
- Tongue
- English
- Weight
- 984 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0098-1532
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โฆ Synopsis
The cellular effects of Ara-C are reviewed including its S-phase sensitivity, its proliferative-dependent cytotoxicity and progression delay effects which result in unbalance growth. Both direct and indirect cytotoxic mechanisms are discussed.
The impact of such cellular information on the scheduling of Ara-C is presented with regard to normal and tumor cell population cytotoxicity. Based on these data a therapeutic rationale is presented.
Key words phase-specific, cell kinetics, drug scheduling, progression delay, therapeutic rationale
๐ SIMILAR VOLUMES
The enzymes responsible for the metabolism of Ara-C and its metabolites in human cells are described. The relevance of the properties of those enzymes to the action of Ara-C is discussed.
Cytosine arabinoside (Ara-C) is a very potent inhibitor of DNA synthesis in mammalian cells. This inhibition does not appear to be due to the direct inhibition of DNA polymerase by Ara-CTP (triphosphate of Ara-C) because it is a very weak competitive inhibitor of this enzyme. The inhibition of DNA s
A Phase I1 study of high dose cytosine arabinoside (ara-C) with different schedules in patients with recurrent acute myelogenous leukaemia (AML) and myeloid blast crisis of chronic myeloid leukaemia has been conducted at St. Bartholomew's Hospital. Ara-C was infused continuously for seven days at a