iScience (Aug 2024)

Dissecting humoral immune responses to an MVA-vectored MERS-CoV vaccine in humans using a systems serology approach

  • Leonie M. Weskamm,
  • Paulina Tarnow,
  • Charlotte Harms,
  • Melanie Huchon,
  • Matthijs P. Raadsen,
  • Monika Friedrich,
  • Laura Rübenacker,
  • Cordula Grüttner,
  • Mariana G. Garcia,
  • Till Koch,
  • Stephan Becker,
  • Gerd Sutter,
  • Edouard Lhomme,
  • Bart L. Haagmans,
  • Anahita Fathi,
  • Sandra M. Blois,
  • Christine Dahlke,
  • Laura Richert,
  • Marylyn M. Addo

Journal volume & issue
Vol. 27, no. 8
p. 110470

Abstract

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Summary: Besides neutralizing antibodies, which are considered an important measure for vaccine immunogenicity, Fc-mediated antibody functions can contribute to antibody-mediated protection. They are strongly influenced by structural antibody properties such as subclass and Fc glycan composition. We here applied a systems serology approach to dissect humoral immune responses induced by MVA-MERS-S, an MVA-vectored vaccine against the Middle East respiratory syndrome coronavirus (MERS-CoV). Building on preceding studies reporting the safety and immunogenicity of MVA-MERS-S, our study highlights the potential of a late boost, administered one year after prime, to enhance both neutralizing and Fc-mediated antibody functionality compared to the primary vaccination series. Distinct characteristics were observed for antibodies specific to the MERS-CoV spike protein S1 and S2 subunits, regarding subclass and glycan compositions as well as Fc functionality. These findings highlight the benefit of a late homologous booster vaccination with MVA-MERS-S and may be of interest for the design of future coronavirus vaccines.

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