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© Valérie Choumet
Mosquitoes were orally infected with the chikungunya virus. Midguts were dissected at day 5 post-infection, fixed and permeabilised. Virus is shown in red (anti-E2 protein, cyanine 3), the actin network in green (phalloidin 548) and nuclei in blue (DAPI).
Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Scientific reports - 05 Mar 2019

Gouignard N, Cherrier F, Brito-Fravallo E, Pain A, Zmarlak NM, Cailliau K, Genève C, Vernick KD, Dissous C, Mitri C

Link to Pubmed [PMID] – 30837655

Sci Rep 2019 Mar;9(1):3615

Vector-borne diseases and especially malaria are responsible for more than half million deaths annually. The increase of insecticide resistance in wild populations of Anopheles malaria vectors emphasises the need for novel vector control strategies as well as for identifying novel vector targets. Venus kinase receptors (VKRs) constitute a Receptor Tyrosine Kinase (RTK) family only found in invertebrates. In this study we functionally characterized Anopheles VKR in the Gambiae complex member, Anopheles coluzzii. Results showed that Anopheles VKR can be activated by L-amino acids, with L-arginine as the most potent agonist. VKR was not required for the fecundity of A. coluzzii, in contrast to reports from other insects, but VKR function is required in both Anopheles males and females for development of larval progeny. Anopheles VKR function is also required for protection against infection by Plasmodium parasites, thus identifying a novel linkage between reproduction and immunity in Anopheles. The insect specificity of VKRs as well as the essential function for reproduction and immunity suggest that Anopheles VKR could be a potentially druggable target for novel vector control strategies.

https://www.ncbi.nlm.nih.gov/pubmed/30837655