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Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Cell+Rep+Med 2021 ; 2 (6): 100313 Nephropedia Template TP
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Cross-reactive coronavirus antibodies with diverse epitope specificities and Fc effector functions #MMPMID34056628
Cell Rep Med 2021[Jun]; 2 (6): 100313 PMID34056628show ga
The continual emergence of novel coronaviruses (CoV), such as severe acute respiratory syndrome-(SARS)-CoV-2, highlights the critical need for broadly reactive therapeutics and vaccines against this family of viruses. From a recovered SARS-CoV donor sample, we identify and characterize a panel of six monoclonal antibodies that cross-react with CoV spike (S) proteins from the highly pathogenic SARS-CoV and SARS-CoV-2, and demonstrate a spectrum of reactivity against other CoVs. Epitope mapping reveals that these antibodies recognize multiple epitopes on SARS-CoV-2 S, including the receptor-binding domain, the N-terminal domain, and the S2 subunit. Functional characterization demonstrates that the antibodies mediate phagocytosis-and in some cases trogocytosis-but not neutralization in vitro. When tested in vivo in murine models, two of the antibodies demonstrate a reduction in hemorrhagic pathology in the lungs. The identification of cross-reactive epitopes recognized by functional antibodies expands the repertoire of targets for pan-coronavirus vaccine design strategies.
|Animals[MESH]
|Antibodies, Monoclonal/*immunology[MESH]
|Antigen-Antibody Reactions[MESH]
|B-Lymphocytes/cytology/metabolism[MESH]
|COVID-19/pathology/virology[MESH]
|Cell Line[MESH]
|Cross Reactions/immunology[MESH]
|Epitope Mapping[MESH]
|Epitopes/*immunology[MESH]
|Female[MESH]
|Humans[MESH]
|Immunoglobulin Fc Fragments/immunology/*metabolism[MESH]