Actions of Camptothecin Derivatives on Larvae and Adults of the Arboviral Vector Aedes aegypti

Partridge, F.A., Poulton, B., Lake, M.A.I., Lees, R.A., Mann, H-J., Lycett, G. and Sattelle, D.B. 2021. Actions of Camptothecin Derivatives on Larvae and Adults of the Arboviral Vector Aedes aegypti. Molecules. 26 (20) 6226. https://doi.org/10.3390/molecules26206226

TitleActions of Camptothecin Derivatives on Larvae and Adults of the Arboviral Vector Aedes aegypti
TypeJournal article
AuthorsPartridge, F.A., Poulton, B., Lake, M.A.I., Lees, R.A., Mann, H-J., Lycett, G. and Sattelle, D.B.
Abstract

Mosquito-borne viruses including dengue, Zika, and Chikungunya viruses, and parasites such as malaria and Onchocerca volvulus endanger health and economic security around the globe, and emerging mosquito-borne pathogens have pandemic potential. However, the rapid spread of insecticide resistance threatens our ability to control mosquito vectors. Larvae of Aedes aegypti were screened with the Medicines for Malaria Venture Pandemic Response Box, an open-source compound library, using INVAPP, an invertebrate automated phenotyping platform suited to high-throughput chemical screening of larval motility. We identified rubitecan (a synthetic derivative of camptothecin) as a hit compound that reduced A. aegypti larval motility. Both rubitecan and camptothecin displayed concentration dependent reduction in larval motility with estimated EC50 of 25.5 ± 5.0 µM and 22.3 ± 5.4 µM, respectively. We extended our investigation to adult mosquitoes and found that camptothecin increased lethality when delivered in a blood meal to A. aegypti adults at 100 µM and 10 µM, and completely blocked egg laying when fed at 100 µM. Camptothecin and its derivatives are inhibitors of topoisomerase I, have known activity against several agricultural pests, and are also approved for the treatment of several cancers. Crucially, they can inhibit Zika virus replication in human cells, so there is potential for dual targeting of both the vector and an important arbovirus that it carries.

Article number6226
JournalMolecules
Journal citation26 (20)
Year2021
PublisherMDPI
Publisher's version
License
CC BY 4.0
File Access Level
Open (open metadata and files)
Digital Object Identifier (DOI)https://doi.org/10.3390/molecules26206226
Web address (URL)https://www.mdpi.com/1420-3049/26/20/6226
Publication dates
Published09 Sep 2021

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