Cyclopropyl carboxamides, a chemically novel class of antimalarial agents identified in a phenotypic screen

Laura M Sanz, Maria B Jimenez-Diaz, Benigno Crespo, Cristina de Cozar, M Jesus Almela, Inigo Angulo-Barturen, Pablo Castaneda, Javier Ibanez, Esther P Fernandez, Santiago B Ferrer, Esperanza Herreros, Sonia Lozano, Maria Santos Martinez, Lourdes Rueda, Jeremy Burrows, Jose Garcia-Bustos, Francisco Javier Gamo-Benito

Research output: Contribution to journalArticleResearchpeer-review

26 Citations (Scopus)

Abstract

Malaria is one of the deadliest infectious diseases in the world, with the eukaryotic parasite Plasmodium falciparum causing the most severe form of the disease. Discovery of new classes of antimalarial drugs has become an urgent task to counteract the increasing problem of drug resistance. Screening directly for compounds able to inhibit parasite growth in vitro is one of the main approaches the malaria research community is now pursuing for the identification of novel antimalarial drug leads. Very recently, thousands of compounds with potent activity against the parasite P. falciparum have been identified and information about their molecular descriptors, antiplasmodial potency, and cytotoxicity is publicly available. Now the challenges are how to identify the most promising chemotypes for further development and how best to progress these compounds through a lead optimization program to generate antimalarial drug candidates. We report here the first chemical series to be characterized from one of those screenings, a completely novel chemical class with the generic name cyclopropyl carboxamides that has never before been described as having antimalarial or other pharmacological activities. Cyclopropyl carboxamides are potent inhibitors of drug-sensitive and -resistant strains of P. falciparum in vitro and show in vivo oral efficacy in malaria mouse models. In the present work, we describe the biological characterization of this chemical family, showing that inhibition of their still unknown target has very favorable pharmacological consequences but the compounds themselves seem to select for resistance at a high frequency.
Original languageEnglish
Pages (from-to)5740 - 5745
Number of pages6
JournalAntimicrobial Agents and Chemotherapy
Volume55
Issue number12
DOIs
Publication statusPublished - 2011

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