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Analysis of a SARS-CoV-2-Infected Individual Reveals Development of Potent Neutralizing Antibodies with Limited Somatic Mutation.

Abstract：

:Antibody responses develop following SARS-CoV-2 infection, but little is known about their epitope specificities, clonality, binding affinities, epitopes, and neutralizing activity. We isolated B cells specific for the SARS-CoV-2 envelope glycoprotein spike (S) from a COVID-19-infected subject 21 days after the onset of clinical disease. 45 S-specific monoclonal antibodies were generated. They had undergone minimal somatic mutation with limited clonal expansion, and three bound the receptor-binding domain (RBD). Two antibodies neutralized SARS-CoV-2. The most potent antibody bound the RBD and prevented binding to the ACE2 receptor, while the other bound outside the RBD. Thus, most anti-S antibodies that were generated in this patient during the first weeks of COVID-19 infection were non-neutralizing and target epitopes outside the RBD. Antibodies that disrupt the SARS-CoV-2 S-ACE2 interaction can potently neutralize the virus without undergoing extensive maturation. Such antibodies have potential preventive and/or therapeutic potential and can serve as templates for vaccine design.

journal_name

Immunity

journal_title

Immunity

authors

Seydoux E,Homad LJ,MacCamy AJ,Parks KR,Hurlburt NK,Jennewein MF,Akins NR,Stuart AB,Wan YH,Feng J,Whaley RE,Singh S,Boeckh M,Cohen KW,McElrath MJ,Englund JA,Chu HY,Pancera M,McGuire AT,Stamatatos L

doi

10.1016/j.immuni.2020.06.001

subject

Has Abstract

pub_date

2020-07-14 00:00:00

pages

98-105.e5

issue

1

eissn

1074-7613

issn

1097-4180

pii

S1074-7613(20)30231-4

journal_volume

53

pub_type

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