Diversity-Oriented Synthesis Probe Targets Plasmodium falciparum Cytochrome b Ubiquinone Reduction Site and Synergizes With Oxidation Site Inhibitors
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Author
Heidebrecht, Richard W.
Mulrooney, Carol
Beaudoin, Jennifer A.
Comer, Eamon
Duvall, Jeremy R.
Fitzgerald, Mark E.
Masi, Daniela
Galinsky, Kevin
Scherer, Christina A.
Palmer, Michelle
Munoz, Benito
Foley, Michael
Schreiber, Stuart L.
Wiegand, Roger C.
Note: Order does not necessarily reflect citation order of authors.
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https://doi.org/10.1093/infdis/jiu565Metadata
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Lukens, A. K., R. W. Heidebrecht, C. Mulrooney, J. A. Beaudoin, E. Comer, J. R. Duvall, M. E. Fitzgerald, et al. 2014. “Diversity-Oriented Synthesis Probe Targets Plasmodium falciparum Cytochrome b Ubiquinone Reduction Site and Synergizes With Oxidation Site Inhibitors.” The Journal of Infectious Diseases 211 (7): 1097-1103. doi:10.1093/infdis/jiu565. http://dx.doi.org/10.1093/infdis/jiu565.Abstract
Background. The emergence and spread of drug resistance to current antimalarial therapies remains a pressing concern, escalating the need for compounds that demonstrate novel modes of action. Diversity-Oriented Synthesis (DOS) libraries bridge the gap between conventional small molecule and natural product libraries, allowing the interrogation of more diverse chemical space in efforts to identify probes of novel parasite pathways. Methods. We screened and optimized a probe from a DOS library using whole-cell phenotypic assays. Resistance selection and whole-genome sequencing approaches were employed to identify the cellular target of the compounds. Results. We identified a novel macrocyclic inhibitor of Plasmodium falciparum with nanomolar potency and identified the reduction site of cytochrome b as its cellular target. Combination experiments with reduction and oxidation site inhibitors showed synergistic inhibition of the parasite. Conclusions. The cytochrome b oxidation center is a validated antimalarial target. We show that the reduction site of cytochrome b is also a druggable target. Our results demonstrating a synergistic relationship between oxidation and reduction site inhibitors suggests a future strategy for new combination therapies in the treatment of malaria.Other Sources
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4354981/pdf/Terms of Use
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