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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 Nat+Commun 2021 ; 12 (1): 469 Nephropedia Template TP
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Molecular determinants and mechanism for antibody cocktail preventing SARS-CoV-2 escape #MMPMID33473140
Ku Z; Xie X; Davidson E; Ye X; Su H; Menachery VD; Li Y; Yuan Z; Zhang X; Muruato AE; I Escuer AG; Tyrell B; Doolan K; Doranz BJ; Wrapp D; Bates PF; McLellan JS; Weiss SR; Zhang N; Shi PY; An Z
Nat Commun 2021[Jan]; 12 (1): 469 PMID33473140show ga
Antibody cocktails represent a promising approach to prevent SARS-CoV-2 escape. The determinants for selecting antibody combinations and the mechanism that antibody cocktails prevent viral escape remain unclear. We compared the critical residues in the receptor-binding domain (RBD) used by multiple neutralizing antibodies and cocktails and identified a combination of two antibodies CoV2-06 and CoV2-14 for preventing viral escape. The two antibodies simultaneously bind to non-overlapping epitopes and independently compete for receptor binding. SARS-CoV-2 rapidly escapes from individual antibodies by generating resistant mutations in vitro, but it doesn't escape from the cocktail due to stronger mutational constraints on RBD-ACE2 interaction and RBD protein folding requirements. We also identified a conserved neutralizing epitope shared between SARS-CoV-2 and SARS-CoV for antibody CoV2-12. Treatments with CoV2-06 and CoV2-14 individually and in combination confer protection in mice. These findings provide insights for rational selection and mechanistic understanding of antibody cocktails as candidates for treating COVID-19.