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• W3011444784 endingPage "e1008428" @default.
• W3011444784 startingPage "e1008428" @default.
• W3011444784 abstract "Enterovirus 71 (EV71) is a causative agent of hand, foot, and mouth disease (HFMD). However, this infection is sometimes associated with severe neurological complications. Identification of neurovirulence determinants is important to understand the pathogenesis of EV71. One of the problems in evaluating EV71 virulence is that its genome sequence changes rapidly during replication in cultured cells. The factors that induce rapid mutations in the EV71 genome in cultured cells are unclear. Here, we illustrate the population dynamics during adaptation to RD-A cells using EV71 strains isolated from HFMD patients. We identified a reproducible amino acid substitution from glutamic acid (E) to glycine (G) or glutamine (Q) in residue 145 of the VP1 protein (VP1-145) after adaptation to RD-A cells, which was associated with attenuation in human scavenger receptor B2 transgenic (hSCARB2 tg) mice. Because previous reports demonstrated that VP1-145G and Q mutants efficiently infect cultured cells by binding to heparan sulfate (HS), we hypothesized that HS expressed on the cell surface is a major factor for this selection. Supporting this hypothesis, selection of the VP1-145 mutant was prevented by depletion of HS and overexpression of hSCARB2 in RD-A cells. In addition, this mutation promotes the acquisition of secondary amino acid substitutions at various positions of the EV71 capsid to increase its fitness in cultured cells. These results indicate that attachment receptors, especially HS, are important factors for selection of VP1-145 mutants and subsequent capsid mutations. Moreover, we offer an efficient method for isolation and propagation of EV71 virulent strains with minimal selection pressure for attenuation." @default.
• W3011444784 created "2020-03-23" @default.
• W3011444784 creator A5065713218 @default.
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• W3011444784 date "2020-03-18" @default.
• W3011444784 modified "2023-10-12" @default.
• W3011444784 title "Heparan sulfate attachment receptor is a major selection factor for attenuated enterovirus 71 mutants during cell culture adaptation" @default.
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• W3011444784 doi "https://doi.org/10.1371/journal.ppat.1008428" @default.
• W3011444784 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7105141" @default.
• W3011444784 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/32187235" @default.
• W3011444784 hasPublicationYear "2020" @default.
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