Biological action of inosine analogs in Leishmania and Trypanosoma spp

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Abstract
Previous investigations have suggested that inosine analogs would be good models for the development of chemotherapeutic agents active against pathogenic hemoflagellates. We have systematically modified the five-membered heterocyclic ring of six inosine analogs and tested them for their antiprotozoal activities and toxicity to a mammalian cell line. All six analogs were very active against the three protozoan pathogens Leishmania donovani, Trypanosoma cruzi, and Trypanosoma gambiense. Two of the six, 9-deazainosine and allopurinol ribonucleoside, had very little toxicity for mouse L cells and offer promise as potential chemotherapeutic agents.