Currently, primaquine is the only malaria transmission-blocking
drug recommended by the WHO. Recent efforts have highlighted the importance
of discovering new agents that regulate malarial transmission, with
particular interest in agents that can be administered in a single
low dose, ideally with a discrete and Plasmodium-selective
mechanism of action. Here, our team demonstrates an approach to identify
malaria transmission-blocking agents through a combination of in vitro screening and in vivo analyses.
Using a panel of natural products, our approach identified potent
transmission blockers, as illustrated by the discovery of the transmission-blocking
efficacy of brusatol. As a member of a large family of biologically
active natural products, this discovery provides a critical next step
toward developing methods to rapidly identify quassinoids and related
agents with valuable pharmacological therapeutic properties.