Broad neutralization of SARS-related viruses by human monoclonal antibodies

AZ Wec, D Wrapp, AS Herbert, DP Maurer… - Science, 2020 - science.org
AZ Wec, D Wrapp, AS Herbert, DP Maurer, D Haslwanter, M Sakharkar, RK Jangra
Science, 2020science.org
Broadly protective vaccines against known and preemergent human coronaviruses (HCoVs)
are urgently needed. To gain a deeper understanding of cross-neutralizing antibody
responses, we mined the memory B cell repertoire of a convalescent severe acute
respiratory syndrome (SARS) donor and identified 200 SARS coronavirus 2 (SARS-CoV-2)
binding antibodies that target multiple conserved sites on the spike (S) protein. A large
proportion of the non-neutralizing antibodies display high levels of somatic hypermutation …
Broadly protective vaccines against known and preemergent human coronaviruses (HCoVs) are urgently needed. To gain a deeper understanding of cross-neutralizing antibody responses, we mined the memory B cell repertoire of a convalescent severe acute respiratory syndrome (SARS) donor and identified 200 SARS coronavirus 2 (SARS-CoV-2) binding antibodies that target multiple conserved sites on the spike (S) protein. A large proportion of the non-neutralizing antibodies display high levels of somatic hypermutation and cross-react with circulating HCoVs, suggesting recall of preexisting memory B cells elicited by prior HCoV infections. Several antibodies potently cross-neutralize SARS-CoV, SARS-CoV-2, and the bat SARS-like virus WIV1 by blocking receptor attachment and inducing S1 shedding. These antibodies represent promising candidates for therapeutic intervention and reveal a target for the rational design of pan-sarbecovirus vaccines.
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