Using barcoded Zika virus to assess virus population structure in vitro and in Aedes aegypti mosquitoes

Arboviruses such as Zika virus (ZIKV, Flaviviridae; Flavivirus) must replicate in both mammalian and insect hosts possessing strong immune defenses. Accordingly, transmission between and replication within hosts involves genetic bottlenecks, during which viral population size and genetic diversity m...

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Bibliographic Details
Published in:Virology (New York, N.Y.) N.Y.), 2018-08, Vol.521, p.138-148
Main Authors: Weger-Lucarelli, James, Garcia, Selene M., Rückert, Claudia, Byas, Alex, O’Connor, Shelby L., Aliota, Matthew T., Friedrich, Thomas C., O’Connor, David H., Ebel, Gregory D.
Format: Article
Language:English
Subjects:
Aedes - virology
Animals
Arbovirus
Cell Line
Flavivirus
Genetic Variation
Haplorhini - virology
Mosquito-borne virus
Virus evolution
Zika virus
Zika Virus - classification
Zika Virus - genetics
Zika Virus - growth & development
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Summary:Arboviruses such as Zika virus (ZIKV, Flaviviridae; Flavivirus) must replicate in both mammalian and insect hosts possessing strong immune defenses. Accordingly, transmission between and replication within hosts involves genetic bottlenecks, during which viral population size and genetic diversity may be significantly reduced. To help quantify these bottlenecks and their effects, we constructed 4 “barcoded” ZIKV populations that theoretically contain thousands of barcodes each. After identifying the most diverse barcoded virus, we passaged this virus 3 times in 2 mammalian and mosquito cell lines and characterized the population using deep sequencing of the barcoded region of the genome. C6/36 maintain higher barcode diversity, even after 3 passages, than Vero. Additionally, field-caught mosquitoes exposed to the virus to assess bottlenecks in a natural host. A progressive reduction in barcode diversity occurred throughout systemic infection of these mosquitoes. Differences in bottlenecks during systemic spread were observed between different populations of Aedes aegypti.
ISSN:0042-6822
1096-0341
DOI:10.1016/j.virol.2018.06.004