Tehran University of Medical Sciences

Science Communicator Platform

Stay connected! Follow us on X network (Twitter):
Share this content! By
Heterologous Immunization With Inactivated Vaccine Followed by Mrna-Booster Elicits Strong Immunity Against Sars-Cov-2 Omicron Variant Publisher Pubmed



Zuo F1 ; Abolhassani H1 ; Du L1 ; Piralla A2 ; Bertoglio F3 ; De Camposmata L1 ; Wan H1 ; Schubert M3 ; Cassaniti I2 ; Wang Y1 ; Sammartino JC2 ; Sun R1 ; Vlachiotis S1 ; Bergami F2 Show All Authors
Authors
  1. Zuo F1
  2. Abolhassani H1
  3. Du L1
  4. Piralla A2
  5. Bertoglio F3
  6. De Camposmata L1
  7. Wan H1
  8. Schubert M3
  9. Cassaniti I2
  10. Wang Y1
  11. Sammartino JC2
  12. Sun R1
  13. Vlachiotis S1
  14. Bergami F2
  15. Kumagaibraesch M4
  16. Andrell J5
  17. Zhang Z6
  18. Xue Y7
  19. Wenzel EV3, 8
  20. Calzolai L9
  21. Varani L10
  22. Rezaei N11
  23. Chavoshzadeh Z12
  24. Baldanti F2, 13
  25. Hust M3
  26. Hammarstrom L1
  27. Marcotte H1
  28. Panhammarstrom Q1

Source: Nature Communications Published:2022


Abstract

The recent emergence of the Omicron variant has raised concerns on vaccine efficacy and the urgent need to study more efficient vaccination strategies. Here we observed that an mRNA vaccine booster in individuals vaccinated with two doses of inactivated vaccine significantly increased the plasma level of specific antibodies that bind to the receptor-binding domain (RBD) or the spike (S) ectodomain (S1 + S2) of both the G614 and the Omicron variants, compared to two doses of homologous inactivated vaccine. The level of RBD- and S-specific IgG antibodies and virus neutralization titers against variants of concern in the heterologous vaccination group were similar to that in individuals receiving three doses of homologous mRNA-vaccine or a boost of mRNA vaccine after infection, but markedly higher than that in individuals receiving three doses of a homologous inactivated vaccine. This heterologous vaccination regime furthermore significantly enhanced the RBD-specific memory B cell response and S1-specific T cell response, compared to two or three doses of homologous inactivated vaccine. Our study demonstrates that mRNA vaccine booster in individuals vaccinated with inactivated vaccines can be highly beneficial, as it markedly increases the humoral and cellular immune responses against the virus, including the Omicron variant. © 2022, The Author(s).
Other Related Docs
9. Conversion of Monoclonal Igg to Dimeric and Secretory Iga Restores Neutralizing Ability and Prevents Infection of Omicron Lineages, Proceedings of the National Academy of Sciences of the United States of America (2024)
17. Obstacles in the Development of Therapeutic Cancer Vaccines, Vaccines for Cancer Immunotherapy: An Evidence-Based Review on Current Status and Future Perspectives (2018)
19. Influenza Vaccine: Where Are We and Where Do We Go?, Reviews in Medical Virology (2019)