ジャーナル: Cell Rep / 年: 2023 タイトル: Rapid escape of new SARS-CoV-2 Omicron variants from BA.2-directed antibody responses. 著者: Aiste Dijokaite-Guraliuc / Raksha Das / Daming Zhou / Helen M Ginn / Chang Liu / Helen M E Duyvesteyn / Jiandong Huo / Rungtiwa Nutalai / Piyada Supasa / Muneeswaran Selvaraj / Thushan I de ...著者: Aiste Dijokaite-Guraliuc / Raksha Das / Daming Zhou / Helen M Ginn / Chang Liu / Helen M E Duyvesteyn / Jiandong Huo / Rungtiwa Nutalai / Piyada Supasa / Muneeswaran Selvaraj / Thushan I de Silva / Megan Plowright / Thomas A H Newman / Hailey Hornsby / Alexander J Mentzer / Donal Skelly / Thomas G Ritter / Nigel Temperton / Paul Klenerman / Eleanor Barnes / Susanna J Dunachie / / Cornelius Roemer / Thomas P Peacock / Neil G Paterson / Mark A Williams / David R Hall / Elizabeth E Fry / Juthathip Mongkolsapaya / Jingshan Ren / David I Stuart / Gavin R Screaton / 要旨: In November 2021, Omicron BA.1, containing a raft of new spike mutations, emerged and quickly spread globally. Intense selection pressure to escape the antibody response produced by vaccines or ...In November 2021, Omicron BA.1, containing a raft of new spike mutations, emerged and quickly spread globally. Intense selection pressure to escape the antibody response produced by vaccines or severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection then led to a rapid succession of Omicron sub-lineages with waves of BA.2 and then BA.4/5 infection. Recently, many variants have emerged such as BQ.1 and XBB, which carry up to 8 additional receptor-binding domain (RBD) amino acid substitutions compared with BA.2. We describe a panel of 25 potent monoclonal antibodies (mAbs) generated from vaccinees suffering BA.2 breakthrough infections. Epitope mapping shows potent mAb binding shifting to 3 clusters, 2 corresponding to early-pandemic binding hotspots. The RBD mutations in recent variants map close to these binding sites and knock out or severely knock down neutralization activity of all but 1 potent mAb. This recent mAb escape corresponds with large falls in neutralization titer of vaccine or BA.1, BA.2, or BA.4/5 immune serum.