» Articles » PMID: 9371652

Efficient Neutralization of Foot-and-mouth Disease Virus by Monovalent Antibody Binding

Overview
Journal J Virol
Date 1997 Nov 26
PMID 9371652
Citations 3
Authors
Affiliations
Soon will be listed here.
Abstract

Neutralization of an aphthovirus by monovalent binding of an antibody is reported. Foot-and-mouth disease virus (FMDV) clone C-S8c1 was neutralized by monoclonal antibody (MAb) SD6, which was directed to a continuous epitope within a major antigenic site of the G-H loop of capsid protein VP1. On a molar basis, the Fab fragment was at most fivefold less active in neutralization than the intact antibody, and both blocked virus attachment to cells. Neither the antibody nor the Fab fragment caused aggregation of virions, as evidenced by sucrose gradient sedimentation studies of the antibody-virus complex formed at antibody to virion ratios of 1:50 to 1:10,000. The results of neutralization of infectivity and of ultracentrifugation are fully consistent with structural data based on X-ray crystallographic and cryoelectron microscopy studies, which showed monovalent interaction of the antibody with a critical receptor binding motif Arg-Gly-Asp. The conclusions of these neutralization studies are that (i) bivalent binding of antibody is not a requisite for strong neutralization of aphthoviruses and (ii) aggregation of viral particles, which has been proposed to be the dominant neutralization mechanism of antibodies that bind monovalently to virions, is not necessary for the neutralization of FMDV C-S8c1 by MAb SD6.

Citing Articles

Deletion mutants of VPg reveal new cytopathology determinants in a picornavirus.

Arias A, Perales C, Escarmis C, Domingo E PLoS One. 2010; 5(5):e10735.

PMID: 20505767 PMC: 2873979. DOI: 10.1371/journal.pone.0010735.


Hidden virulence determinants in a viral quasispecies in vivo.

Sanz-Ramos M, Diaz-San Segundo F, Escarmis C, Domingo E, Sevilla N J Virol. 2008; 82(21):10465-76.

PMID: 18715925 PMC: 2573215. DOI: 10.1128/JVI.00825-08.


A similar pattern of interaction for different antibodies with a major antigenic site of foot-and-mouth disease virus: implications for intratypic antigenic variation.

Verdaguer N, Sevilla N, Valero M, Stuart D, Brocchi E, Andreu D J Virol. 1998; 72(1):739-48.

PMID: 9420281 PMC: 109430. DOI: 10.1128/JVI.72.1.739-748.1998.

References
1.
Wild T, Brown F . Nature of the inactivating action of trypsin on foot-and-mouth disease virus. J Gen Virol. 1967; 1(2):247-50. DOI: 10.1099/0022-1317-1-2-247. View

2.
Martinez M, Verdaguer N, Mateu M, Domingo E . Evolution subverting essentiality: dispensability of the cell attachment Arg-Gly-Asp motif in multiply passaged foot-and-mouth disease virus. Proc Natl Acad Sci U S A. 1997; 94(13):6798-802. PMC: 21238. DOI: 10.1073/pnas.94.13.6798. View

3.
Sobrino F, Davila M, Ortin J, Domingo E . Multiple genetic variants arise in the course of replication of foot-and-mouth disease virus in cell culture. Virology. 1983; 128(2):310-8. DOI: 10.1016/0042-6822(83)90258-1. View

4.
Baxt B, MORGAN D, Robertson B, Timpone C . Epitopes on foot-and-mouth disease virus outer capsid protein VP1 involved in neutralization and cell attachment. J Virol. 1984; 51(2):298-305. PMC: 254438. DOI: 10.1128/JVI.51.2.298-305.1984. View

5.
Wetz K, Willingmann P, Zeichhardt H, HABERMEHL K . Neutralization of poliovirus by polyclonal antibodies requires binding of a single IgG molecule per virion. Arch Virol. 1986; 91(3-4):207-20. DOI: 10.1007/BF01314281. View