A high throughput screen for next-generation leads targeting malaria parasite transmission

Nature Communications
Michael J DelvesJake Baum

Abstract

Spread of parasite resistance to artemisinin threatens current frontline antimalarial therapies, highlighting the need for new drugs with alternative modes of action. Since only 0.2-1% of asexual parasites differentiate into sexual, transmission-competent forms, targeting this natural bottleneck provides a tangible route to interrupt disease transmission and mitigate resistance selection. Here we present a high-throughput screen of gametogenesis against a ~70,000 compound diversity library, identifying seventeen drug-like molecules that target transmission. Hit molecules possess varied activity profiles including male-specific, dual acting male-female and dual-asexual-sexual, with one promising N-((4-hydroxychroman-4-yl)methyl)-sulphonamide scaffold found to have sub-micromolar activity in vitro and in vivo efficacy. Development of leads with modes of action focussed on the sexual stages of malaria parasite development provide a previously unexplored base from which future therapeutics can be developed, capable of preventing parasite transmission through the population.

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Methods Mentioned

BETA
Assay
NMR
fluorescence microscopy
density gradient sedimentation

Software Mentioned

NIS Elements
MS
ICY Image Analysis
Harmony
ChEMBL
Excel
Spotfire DecisionSite
Operetta

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