Impact of Natural or Synthetic Singletons in the Capsid of Human Bocavirus 1 on Particle Infectivity and Immunoreactivity.
BoV
bocavirus
capsid
mutations
Journal
Journal of virology
ISSN: 1098-5514
Titre abrégé: J Virol
Pays: United States
ID NLM: 0113724
Informations de publication
Date de publication:
18 05 2020
18 05 2020
Historique:
received:
30
01
2020
accepted:
16
03
2020
pubmed:
28
3
2020
medline:
21
10
2020
entrez:
28
3
2020
Statut:
epublish
Résumé
Human bocavirus 1 (HBoV1) is a parvovirus that gathers increasing attention due to its pleiotropic role as a pathogen and emerging vector for human gene therapy. Curiously, albeit a large variety of HBoV1 capsid variants has been isolated from human samples, only one has been studied as a gene transfer vector to date. Here, we analyzed a cohort of HBoV1-positive samples and managed to PCR amplify and sequence 29 distinct HBoV1 capsid variants. These differed from the originally reported HBoV1 reference strain in 32 nucleotides or four amino acids, including a frequent change of threonine to serine at position 590. Interestingly, this T590S mutation was associated with lower viral loads in infected patients. Analysis of the time course of infection in two patients for up to 15 weeks revealed a gradual accumulation of T590S, concurrent with drops in viral loads. Surprisingly, in a recombinant vector context, T590S was beneficial and significantly increased titers compared to that of T590 variants but had no major impact on their transduction ability or immunoreactivity. Additional targeted mutations in the HBoV1 capsid identified several residues that are critical for transduction, capsid assembly, or DNA packaging. Our new findings on the phylogeny, infectivity, and immunoreactivity of HBoV1 capsid variants improve our understanding of bocaviral biology and suggest strategies to enhance HBoV1 gene transfer vectors.
Identifiants
pubmed: 32213611
pii: JVI.00170-20
doi: 10.1128/JVI.00170-20
pmc: PMC7269442
pii:
doi:
Substances chimiques
Capsid Proteins
0
DNA, Viral
0
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Subventions
Organisme : NIGMS NIH HHS
ID : R01 GM082946
Pays : United States
Informations de copyright
Copyright © 2020 American Society for Microbiology.
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