2021
DOI: 10.1016/j.cell.2021.07.006
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Pan-protective anti-alphavirus human antibodies target a conserved E1 protein epitope

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Cited by 55 publications
(44 citation statements)
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“…Other arthritogenic alphaviruses including MAYV, ONNV, and UNAV cause substantial acute and chronic human disease and contain cross-reactive neutralizing epitopes [57]. In our studies, HydroVax-CHIKV vaccination elicited substantial cross-neutralization against other alphaviruses (Fig 3D), albeit at lower titers compared to CHIKV itself, which is not unexpected since these are genetically distinct alphaviruses.…”
Section: Plos Pathogenssupporting
confidence: 65%
“…Other arthritogenic alphaviruses including MAYV, ONNV, and UNAV cause substantial acute and chronic human disease and contain cross-reactive neutralizing epitopes [57]. In our studies, HydroVax-CHIKV vaccination elicited substantial cross-neutralization against other alphaviruses (Fig 3D), albeit at lower titers compared to CHIKV itself, which is not unexpected since these are genetically distinct alphaviruses.…”
Section: Plos Pathogenssupporting
confidence: 65%
“…Potent neutralizing MAbs specific to the E2 glycoprotein of VEEV, EEEV and WEEV have been shown to protect in mouse models ( Burke et al, 2018 ; Hunt et al, 2011 ; Kim et al, 2019 ). Non-neutralizing antibodies may also confer protection after lethal alphavirus challenge, and this protection may be inhibiting viral egress from the infected cell and facilitating monocyte-dependent antibody effector functions ( Boere et al, 1983 ; Kim et al, 2021 ; Parker et al, 2010 ; Rulker et al, 2012 ; Schmaljohn et al, 1982 ; Williamson et al, 2021 ).…”
Section: Discussionmentioning
confidence: 99%
“…Four MAbs (1A4B-6, 2A2C-3, 3A5B-1 and 3A1C-12) that recognize similar epitopes on the fusion loop of alphaviruses were found to have moderate quantities of antibody-binding sites on the surface of VEEV infected cells. Protection by cross-reactive, non-neutralizing antibodies in alphaviral infections has been attributed to Fc effector functions such as Ab-dependent cell-mediated cytotoxicity (ADCC) and Ab dependent cell phagocytosis ( Burke et al, 2018 ; Kim et al, 2019 , 2021 ; Pal et al, 2013 ; Wust et al, 1987 ). Based on the quantitative flow cytometry data showing that the epitope recognized by 1A4B-6 is readily available on the surface of paraformaldehyde-fixed infected cells and our data showing in vivo protection from VEEV infection with 1A4B-6, we hypothesize that protection may be afforded by ADCC and warrants further investigation.…”
Section: Discussionmentioning
confidence: 99%
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“…Further, mAbs to the highly conserved fusion loop of E1 (which lies below the B-region of the E2 protein in the intact virus) have crossneutralizing activity [39], confirming that diverse AV have a similar mechanisms of cell entry. Humans infected with EEEV can produce antibodies that also limit infection with VEEV or CHIKV [39], while those infected with CHIKV can produce antibodies that protect against multiple alphaviruses [40]. Most of the neutralizing mAbs against CHIKV and EEEV that have been structurally characterized bind to surface-exposed regions of the A and B domain of the E2 protein [41][42][43][44].…”
Section: Introductionmentioning
confidence: 99%