ジャーナル: iScience / 年: 2024 タイトル: Broad sarbecovirus neutralization by combined memory B cell antibodies to ancestral SARS-CoV-2. 著者: Cyril Planchais / Ignacio Fernández / Benjamin Chalopin / Timothée Bruel / Pierre Rosenbaum / Maxime Beretta / Jordan D Dimitrov / Laurine Conquet / Flora Donati / Matthieu Prot / ...著者: Cyril Planchais / Ignacio Fernández / Benjamin Chalopin / Timothée Bruel / Pierre Rosenbaum / Maxime Beretta / Jordan D Dimitrov / Laurine Conquet / Flora Donati / Matthieu Prot / Françoise Porrot / Delphine Planas / Isabelle Staropoli / Florence Guivel-Benhassine / Eduard Baquero / Sylvie van der Werf / Ahmed Haouz / Etienne Simon-Lorière / Xavier Montagutelli / Bernard Maillère / Félix A Rey / Pablo Guardado-Calvo / Hervé Nozach / Olivier Schwartz / Hugo Mouquet / 要旨: Antibodies play a pivotal role in protecting from SARS-CoV-2 infection, but their efficacy is challenged by the continuous emergence of viral variants. In this study, we describe two broadly ...Antibodies play a pivotal role in protecting from SARS-CoV-2 infection, but their efficacy is challenged by the continuous emergence of viral variants. In this study, we describe two broadly neutralizing antibodies cloned from the memory B cells of a single convalescent individual after infection with ancestral SARS-CoV-2. Cv2.3194, a resilient class 1 anti-RBD antibody, remains active against Omicron sub-variants up to BA.2.86. Cv2.3132, a near pan-Sarbecovirus neutralizer, targets the heptad repeat 2 membrane proximal region. When combined, Cv2.3194 and Cv2.3132 form a complementary SARS-CoV-2 neutralizing antibody cocktail exhibiting a local dose-dependent synergy. Thus, remarkably robust neutralizing memory B cell antibodies elicited in response to ancestral SARS-CoV-2 infection can withstand viral evolution and immune escape. The cooperative effect of such antibody combination may confer a certain level of protection against the latest SARS-CoV-2 variants.