The use of barcoded Asaia bacteria in mosquito in vivo screens for identification of systemic insecticides and inhibitors of malaria transmission
Angelika, S.; Vos, M.; Henderson, R.; Eldering, M.; Koolen, K.; Sheshachalam, A.; Favia, G.; Samby, K.; Herreros, E.; Dechering, K. J.
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This work addresses the need for new chemical matter in product development for control of pest insects and vector-borne diseases. We present a barcoding strategy that enables phenotypic screens of blood-feeding insects against small molecules in microtiter plate-based arrays and apply this to discovery of novel systemic insecticides and compounds that block malaria parasite development in the mosquito vector. Encoding of the bloodmeals was achieved through recombinant DNA-tagged Asaia bacteria that successfully colonized Aedes and Anopheles mosquitoes. An arrayed screen of a collection of pesticides showed that chemical classes of avermectins, phenylpyrazoles and neonicotinoids were enriched for compounds with systemic adulticide activity against Anopheles. Using a luminescent Plasmodium falciparum reporter strain, barcoded screens identified 48 drug-like transmission blocking compounds from a 400-compound antimicrobial library. The approach significantly increases the throughput in phenotypic screening campaigns using adult insects, and identifies novel candidate small molecules for disease control.
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