Increased Potency and Breadth of SARS-CoV-2 Neutralizing Antibodies After a Third mRNA Vaccine Dose
Increased Potency and Breadth of SARS-CoV-2 Neutralizing Antibodies After a Third mRNA Vaccine Dose
Abstract The omicron variant of SARS-CoV-2 infected very large numbers of SARS-CoV-2 vaccinated and convalescent individuals1–3. The penetrance of this variant in the antigen experienced human population can be explained in part by the relatively low levels of plasma neutralizing activity against Omicron in people who were infected or vaccinated with the original Wuhan-Hu-1 strain4–7. The 3rd mRNA vaccine dose produces an initial increase in circulating anti-Omicron neutralizing antibodies, but titers remain 10-20-fold lower than against Wuhan-Hu-1 and are, in many cases, insufficient to prevent infection7. Despite the reduced protection from infection, individuals that received 3 doses of an mRNA vaccine were highly protected from the more serious consequences of infection8. Here we examine the memory B cell repertoire in a longitudinal cohort of individuals receiving 3 mRNA vaccine doses9,10. We find that the 3rd dose is accompanied by an increase in, and evolution of, anti-receptor binding domain specific memory B cells. The increase is due to expansion of memory B cell clones that were present after the 2nd vaccine dose as well as the emergence of new clones. The antibodies encoded by these cells showed significantly increased potency and breadth when compared to antibodies obtained after the 2nd vaccine dose. Notably, the increase in potency was especially evident among newly developing clones of memory cells that differed from the persisting clones in targeting more conserved regions of the RBD. Overall, more than 50% of the analyzed neutralizing antibodies in the memory compartment obtained from individuals receiving a 3rd mRNA vaccine dose neutralized Omicron. Thus, individuals receiving 3 doses of an mRNA vaccine encoding Wuhan-Hu-1, have a diverse memory B cell repertoire that can respond rapidly and produce antibodies capable of clearing even diversified variants such as Omicron. These data help explain why a 3rd dose of an mRNA vaccine that was not specifically designed to protect against variants is effective against variant-induced serious disease.
Cho Alice、Bednarski Eva、Zong Shuai、Schaefer-Babajew Dennis、Shimeliovich Irina、Gazumyan Anna、Caskey Marina、Hatziioannou Theodora、Bieniasz Paul D.、Muecksch Frauke、Yao Kai-Hui、Oliveria Thiago Y.、DaSilva Justin、Ramos Victor、Millard Katrina G.、Raspe Raphael、Tanfous Tarek Ben、Turroja Martina、Schmidt Fabian、Gaebler Christian、Daga Mridushi、Jankovic Mila、Johnson Brianna、Nussenzweig Michel C.、Wang Zijun
Laboratory of Molecular Immunology, The Rockefeller UniversityLaboratory of Retrovirology, The Rockefeller UniversityLaboratory of Molecular Immunology, The Rockefeller UniversityLaboratory of Molecular Immunology, The Rockefeller UniversityLaboratory of Molecular Immunology, The Rockefeller UniversityLaboratory of Molecular Immunology, The Rockefeller UniversityLaboratory of Molecular Immunology, The Rockefeller UniversityLaboratory of Retrovirology, The Rockefeller UniversityLaboratory of Retrovirology, The Rockefeller University||Howard Hughes Medical InstituteLaboratory of Retrovirology, The Rockefeller UniversityLaboratory of Molecular Immunology, The Rockefeller UniversityLaboratory of Molecular Immunology, The Rockefeller UniversityLaboratory of Retrovirology, The Rockefeller UniversityLaboratory of Molecular Immunology, The Rockefeller UniversityLaboratory of Molecular Immunology, The Rockefeller UniversityLaboratory of Molecular Immunology, The Rockefeller UniversityLaboratory of Molecular Immunology, The Rockefeller UniversityLaboratory of Molecular Immunology, The Rockefeller UniversityLaboratory of Retrovirology, The Rockefeller UniversityLaboratory of Molecular Immunology, The Rockefeller UniversityLaboratory of Molecular Immunology, The Rockefeller UniversityLaboratory of Molecular Immunology, The Rockefeller UniversityLaboratory of Molecular Immunology, The Rockefeller UniversityLaboratory of Molecular Immunology, The Rockefeller University||Howard Hughes Medical InstituteLaboratory of Molecular Immunology, The Rockefeller University
医药卫生理论医学研究方法预防医学
Cho Alice,Bednarski Eva,Zong Shuai,Schaefer-Babajew Dennis,Shimeliovich Irina,Gazumyan Anna,Caskey Marina,Hatziioannou Theodora,Bieniasz Paul D.,Muecksch Frauke,Yao Kai-Hui,Oliveria Thiago Y.,DaSilva Justin,Ramos Victor,Millard Katrina G.,Raspe Raphael,Tanfous Tarek Ben,Turroja Martina,Schmidt Fabian,Gaebler Christian,Daga Mridushi,Jankovic Mila,Johnson Brianna,Nussenzweig Michel C.,Wang Zijun.Increased Potency and Breadth of SARS-CoV-2 Neutralizing Antibodies After a Third mRNA Vaccine Dose[EB/OL].(2025-03-28)[2025-05-17].https://www.biorxiv.org/content/10.1101/2022.02.14.480394.点此复制
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