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Developing a Vaccine to Block West Nile Virus Transmission: In Silico Studies, Molecular Characterization, Expression, and Blocking Activity of MosGCTL-1

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Journal Pathogens
Date 2021 Mar 6
PMID 33671430
Citations 1
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Abstract

Background: Mosquito galactose-specific C-type lectins (mosGCTLs), such as mosGCTL-1, act as ligands to facilitate the invasion of flaviviruses like West Nile virus (WNV). WNV interacts with the of (Culicidae) and facilitates the invasion of this virus. Nevertheless, there is no data about the role of mosGCTL-1 as a transmission-blocking vaccine candidate in , the most abundant Culicinae mosquito in temperate regions.

Methods: Adult female mosquitoes were experimentally infected with a WNV infectious blood meal, and the effect of rabbit anti-rmosGCTL-1 antibodies on virus replication was evaluated. Additionally, in silico studies such as the prediction of protein structure, homology modeling, and molecular interactions were carried out.

Results: We showed a 30% blocking activity of polyclonal antibodies (compared to the 10% in the control group) with a decrease in infection rates in mosquitoes at day 5 post-infection, suggesting that there may be other proteins in the midgut of that could act as cooperative-receptors for WNV. In addition, docking results revealed that WNV binds with high affinity, to the mosquito lectin receptors.

Conclusions: Our results do not support the idea that mosGCTL-1 of primarily interacts with WNV to promote viral infection, suggesting that other mosGCTLs may act as primary infection factors in

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