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Publication Abstract from PubMed

Preexisting immunity against seasonal coronaviruses (CoVs) represents an important variable in predicting antibody responses and disease severity to severe acute respiratory syndrome CoV-2 (SARS-CoV-2) infections. We used electron microscopy-based polyclonal epitope mapping (EMPEM) to characterize the antibody specificities against beta-CoV spike proteins in prepandemic (PP) sera or SARS-CoV-2 convalescent (SC) sera. We observed that most PP sera had antibodies specific to seasonal human CoVs (HCoVs) OC43 and HKU1 spike proteins while the SC sera showed reactivity across all human beta-CoVs. Detailed molecular mapping of spike-antibody complexes revealed epitopes that were differentially targeted by preexisting antibodies and SC serum antibodies. Our studies provide an antigenic landscape to beta-HCoV spikes in the general population serving as a basis for cross-reactive epitope analyses in SARS-CoV-2-infected individuals.

Structural mapping of antibody landscapes to human betacoronavirus spike proteins.,Bangaru S, Antanasijevic A, Kose N, Sewall LM, Jackson AM, Suryadevara N, Zhan X, Torres JL, Copps J, de la Pena AT, Crowe JE Jr, Ward AB Sci Adv. 2022 May 6;8(18):eabn2911. doi: 10.1126/sciadv.abn2911. Epub 2022 May 4. PMID:35507649^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.