Attenuation hotspots in neurotropic human astroviruses

During the last decade, the detection of neurotropic astroviruses has increased dramatically. The MLB genogroup of astroviruses represents a genetically distinct group of zoonotic astroviruses associated with gastroenteritis and severe neurological complications in young children, the immunocompromi...

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Veröffentlicht in:PLoS biology 2023-07, Vol.21 (7), p.e3001815
Hauptverfasser: Ali, Hashim, Lulla, Aleksei, Nicholson, Alex S, Hankinson, Jacqueline, Wignall-Fleming, Elizabeth B, O'Connor, Rhian L, Vu, Diem-Lan, Graham, Stephen C, Deane, Janet E, Guix, Susana, Lulla, Valeria
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container_volume 21
creator Ali, Hashim
Lulla, Aleksei
Nicholson, Alex S
Hankinson, Jacqueline
Wignall-Fleming, Elizabeth B
O'Connor, Rhian L
Vu, Diem-Lan
Graham, Stephen C
Deane, Janet E
Guix, Susana
Lulla, Valeria
description During the last decade, the detection of neurotropic astroviruses has increased dramatically. The MLB genogroup of astroviruses represents a genetically distinct group of zoonotic astroviruses associated with gastroenteritis and severe neurological complications in young children, the immunocompromised, and the elderly. Using different virus evolution approaches, we identified dispensable regions in the 3' end of the capsid-coding region responsible for attenuation of MLB astroviruses in susceptible cell lines. To create recombinant viruses with identified deletions, MLB reverse genetics (RG) and replicon systems were developed. Recombinant truncated MLB viruses resulted in imbalanced RNA synthesis and strong attenuation in iPSC-derived neuronal cultures confirming the location of neurotropism determinants. This approach can be used for the development of vaccine candidates using attenuated astroviruses that infect humans, livestock animals, and poultry.
doi_str_mv 10.1371/journal.pbio.3001815
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subjects Aged
Animals
Astroviridae Infections - diagnosis
Astroviridae Infections - veterinary
Attenuation
Biology and life sciences
Capsid
Capsid Proteins - genetics
Cell culture
Cell lines
Child
Child, Preschool
Coding
Complications
Evolution
Gastroenteritis
Genetics
Genomes
Health aspects
Humans
Infections
Livestock
Mamastrovirus - genetics
Medicine and Health Sciences
Methods and Resources
Neurological complications
Neurotrophic functions
Neurotropism
Pathogenesis
Phylogeny
Proteins
RNA polymerase
RNA viruses
Transcription
Vaccines
Viruses
title Attenuation hotspots in neurotropic human astroviruses
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