Abstract:
:Clofarabine is a new-generation nucleoside analog that has been synthesized to combine the most favorable pharmacokinetic properties of its congeners fludarabine and cladribine. In addition to inhibition of DNA polymerases and DNA synthesis, clofarabine acts as a strong inhibitor of ribonucleotide reductase (RnR), an enzyme involved in regulating intracellular deoxynucleotide pools, and has a high affinity to the enzyme deoxycytidine kinase (dCyd), the rate-limiting step in nucleoside phosphorylation.A review of the English literature was performed that included original articles and related reviews from the MEDLINE (PubMed) data base and from abstracts based on the publication of meeting materials. Although it was synthesized early in the 1980s, the development of clofarabine was stalled until 1993, when, through efforts at The University of Texas M. D. Anderson Cancer Center, animal toxicology studies were conducted, and the first Phase I study was initiated in patients with hematologic and solid malignancies. Since then, clofarabine has demonstrated single-agent antitumor activity in pediatric and adult acute leukemias. By way of its unique metabolic properties, clofarabine also has lent itself to biochemical modulation strategies with other nucleoside analogs, such as cytarabine. Combinations of clofarabine with cytarabine have been studied in acute leukemia and currently are being evaluated in untreated elderly patients with acute myeloid leukemia. Novel schedules are being explored in lymphoproliferative disorders and solid tumors. Clofarabine is a new nucleoside analog with considerable activity and an acceptable safety profile in acute leukemias.
journal_name
Cancerjournal_title
Cancerauthors
Faderl S,Gandhi V,Keating MJ,Jeha S,Plunkett W,Kantarjian HMdoi
10.1002/cncr.21005subject
Has Abstractpub_date
2005-05-15 00:00:00pages
1985-95issue
10eissn
0008-543Xissn
1097-0142journal_volume
103pub_type
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