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J Med Chem. 2008 Feb 14;51(3):545-52. doi: 10.1021/jm070760l. Epub 2008 Jan 4.

Development of potent purine-derived nitrile inhibitors of the trypanosomal protease TbcatB.

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  • 1Graduate Program in Chemistry and Chemical Biology and Department of Cellular and Molecular Pharmacology, University of California, San Francisco, CA 94143-2280, USA.

Abstract

Human African trypanosomiasis (HAT), a major health concern in sub-Saharan Africa, is caused by the protozoan parasite Trypanosoma brucei. Recent studies have shown that a cathepsin B like protease, TbcatB, is essential to the survival of T. brucei in vitro (Mackey, Z. B.; O'Brien, T. C.; Greenbaum, D. C.; Blank, R. B.; McKerrow, J. H. J. Biol. Chem. 2004, 279, 48426-48433). Herein, we describe the first inhibitors of TbcatB, a series of purine nitriles. The compounds are potent trypanocides, killing the parasite with a high degree of selectivity over a panel of three human cell lines. In addition, a predictive model of trypanocidal activity was developed on the basis of potency against TbcatB and various calculated physical property descriptors.

PMID:
18173229
[PubMed - indexed for MEDLINE]

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