Title:Base-Modified Nucleosides as Chemotherapeutic Agents: Past and Future
Volume: 16
Issue: 11
Author(s): Matthew P. Burke, Kayla M. Borland and Vladislav A. Litosh
Affiliation:
Keywords:
Antimetabolites, Anticancer and anti-microbial chemotherapeutics, Modified nucleobases, Nucleosides
Abstract: Nucleoside and nucleobase antimetabolites have substantially impacted treatment of cancer
and infections. Their close resemblance to natural analogs gives them the power to interfere with a variety
of intracellular targets, which on one hand gives them high potency, but on the other hand incurs
severe side effects, especially of the chemotherapeutics used against malignancies. Therefore, the development
of novel nucleoside analogs with widened therapeutic windows represents an attractive target
to synthetic organic and medicinal chemists. This review discusses the current antimetabolite drugs: 5-
fluorouracil, 6-mercaptopurine, 6-thioguanine, Cladribine, Vidaza, Decitabine, Emtricitabine, Abacavir,
Sorivudine, Clofarabine, Fludarabine, and Nelarabine; gives insight into the nucleoside drug candidates that are being developed;
and outlines the approaches to nucleobase modifications that may help discover novel bioactive nucleoside analogs
with the mechanism of action focused on termination of DNA synthesis, which is expected to diminish the off-target toxicity
in non-proliferating human cells.
