Abstract
Since drug resistance and toxicity limit the use of available antiprotozoal agents, it is important that new drugs be developed as soon as possible. In this study, the method by which several protozoa degrade 5'-methylthioadenosine (MTA) was shown to differ from MTA catabolism in human cells. To exploit this metabolic difference, two analogs of methylthioribose (MTR), an MTA catabolite, were synthesized and found to be cytocidal to Plasmodium falciparum, Giardia lamblia, and Ochromonas malhamensis in vitro. In contrast, these analogs had no effect on cultured mammalian cells. Analogs of MTR represent a potential new class of antiprotozoal drugs.
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