| Autor: |
Joanne Byrne, Lili Gu, Alejandro Garcia-Leon, Colette Marie Gaillard, Gurvin Saini, Dana Alalwan, Julen Tomás-Cortázar, Grace Kenny, Sean Donohue, Bearach Reynolds, Tessa O’Gorman, Alan Landay, Peter Doran, Jannik Stemler, Philipp Koehler, Rebecca Jane Cox, Ole F. Olesen, Jean-Daniel Lelievre, Cathal O’Broin, Stefano Savinelli, Eoin R. Feeney, Jane A. O’Halloran, Aoife Cotter, Mary Horgan, Christine Kelly, Corrina Sadlier, Eoghan de Barra, Oliver A. Cornely, Virginie Gautier, Patrick WG Mallon, All Ireland Infectious Diseases cohort study and VACCELERATE consortium, A. Cotter, E. Muldoon, G. Sheehan, T. McGinty, J. S. Lambert, T. O’Gorman, C. Kelly, K. Leamy, J. Byrne, G. Kenny, K. McCann, R. McCann, C. O’Broin, S. Savinelli, J. O’Halloran, E. Feeney, P. W. G. Mallon, A. Garcia Leon, S. Miles, D. Alalwan, R. Negi, G. Saini, E. Moore, E. de Barra, S. McConkey, K. Hurley, B. Jacob, F. Lyons, M. Horgan, C. Sadlier, T. Bracken, B. Whelan, J Low, O Yousif, B. McNicholas, G. Courtney, C. O’Maoldomhnaigh, P. Gavin, Julia M. Neuhann, Ullrich Bethe, Sarah Heringer, Jon Salmanton-Garcı́a, Lea Tischmann, Arnd Cüppers, Jan Grothe, Antonio J. Carcas, Jesús Frías-Iniesta, Murat Akova, Alejandro Garcia Leon, Patrick Mallon, Riya Negi, Colette Gaillard, Christine Lammens, An Hotterbeekx, Katherine Loens, Surbhi Malhotra-Kumar, Herman Goossens, Samir Kumar-Singh, Franz König, Lusine Yeghiazaryan, Martin Posch |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
Frontiers in Immunology, Vol 15 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
1664-3224 |
| DOI: |
10.3389/fimmu.2024.1445653 |
| Popis: |
IntroductionA clear immune correlate of protection from severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection has not been defined. We explored antibody, B-cell, and T-cell responses to the third-dose vaccine and relationship to incident SARS-CoV-2 infection.MethodsAdults in a prospective cohort provided blood samples at day 0, day 14, and 10 months after the third-dose SARS-CoV-2 vaccine. Participants self-reported incident SARS-CoV-2 infection. Plasma anti–SARS-CoV-2 receptor-binding domain (RBD) and spike-subunit-1 and spike-subunit-2 antibodies were measured. A sub-study assessed SARS-CoV-2–specific plasma and memory B-cell and memory T-cell responses in peripheral blood mononuclear cells by enzyme-linked immunospot. Comparative analysis between participants who developed incident infection and uninfected participants utilised non-parametric t-tests, Kaplan–Meier survival analysis, and Cox proportional hazard ratios.ResultsOf the 132 participants, 47 (36%) reported incident SARS-CoV-2 infection at a median 16.5 (16.25–21) weeks after the third-dose vaccination. RBD titres and B-cell responses, but not T-cell responses, increased after the third-dose vaccine. Whereas no significant difference in day 14 antibody titres or T-cell responses was observed between participants with and without incident SARS-CoV-2 infection, RBD memory B-cell frequencies were significantly higher in those who did not develop infection [10.0% (4.5%–16.0%) versus 4.9% (1.6%–9.3%), p = 0.01]. RBD titres and memory B-cell frequencies remained significantly higher at 10 months than day 0 levels (p < 0.01).DiscussionRobust antibody and B-cell responses persisted at 10 months following the third-dose vaccination. Higher memory B-cell frequencies, rather than antibody titres or T-cell responses, predicted protection from subsequent infection, identifying memory B cells as a correlate of protection. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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