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Pyrazoleamide compounds are potent antimalarials that target Na+ homeostasis in intraerythrocytic Plasmodium falciparum

  • Akhil B. Vaidya*
  • , Joanne M. Morrisey
  • , Zhongsheng Zhang
  • , Sudipta Das
  • , Thomas M. Daly
  • , Thomas D. Otto
  • , Natalie J. Spillman
  • , Matthew Wyvratt
  • , Peter Siegl
  • , Jutta Marfurt
  • , Grennady Wirjanata
  • , Boni F. Sebayang
  • , Ric N. Price
  • , Arnab Chatterjee
  • , Advait Nagle
  • , Marcin Stasiak
  • , Susan A. Charman
  • , Iñigo Angulo-Barturen
  • , Santiago Ferrer
  • , María Belén Jiménez-Díaz
  • María Santos Martínez, Francisco Javier Gamo, Vicky M. Avery, Andrea Ruecker, Michael Delves, Kiaran Kirk, Matthew Berriman, Sandhya Kortagere, Jeremy Burrows, Erkang Fan, Lawrence W. Bergman
*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    115 Citations (Scopus)

    Abstract

    The quest for new antimalarial drugs, especially those with novel modes of action, is essential in the face of emerging drug-resistant parasites. Here we describe a new chemical class of molecules, pyrazoleamides, with potent activity against human malaria parasites and showing remarkably rapid parasite clearance in an in vivo model. Investigations involving pyrazoleamide-resistant parasites, whole-genome sequencing and gene transfers reveal that mutations in two proteins, a calcium-dependent protein kinase (PfCDPK5) and a P-type cation-ATPase (PfATP4), are necessary to impart full resistance to these compounds. A pyrazoleamide compound causes a rapid disruption of Na+ regulation in blood-stage Plasmodium falciparum parasites. Similar effect on Na+ homeostasis was recently reported for spiroindolones, which are antimalarials of a chemical class quite distinct from pyrazoleamides. Our results reveal that disruption of Na+ homeostasis in malaria parasites is a promising mode of antimalarial action mediated by at least two distinct chemical classes.

    Original languageEnglish
    Article number5521
    JournalNature Communications
    Volume5
    DOIs
    Publication statusPublished - 2014

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