Cell Reports (Dec 2024)

Protein nanoparticle vaccines induce potent neutralizing antibody responses against MERS-CoV

  • Cara W. Chao,
  • Kaitlin R. Sprouse,
  • Marcos C. Miranda,
  • Nicholas J. Catanzaro,
  • Miranda L. Hubbard,
  • Amin Addetia,
  • Cameron Stewart,
  • Jack T. Brown,
  • Annie Dosey,
  • Adian Valdez,
  • Rashmi Ravichandran,
  • Grace G. Hendricks,
  • Maggie Ahlrichs,
  • Craig Dobbins,
  • Alexis Hand,
  • Jackson McGowan,
  • Boston Simmons,
  • Catherine Treichel,
  • Isabelle Willoughby,
  • Alexandra C. Walls,
  • Andrew T. McGuire,
  • Elizabeth M. Leaf,
  • Ralph S. Baric,
  • Alexandra Schäfer,
  • David Veesler,
  • Neil P. King

Journal volume & issue
Vol. 43, no. 12
p. 115036

Abstract

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Summary: Middle East respiratory syndrome coronavirus (MERS-CoV) is a betacoronavirus that causes severe respiratory illness in humans. There are no licensed vaccines against MERS-CoV and only a few candidates in phase I clinical trials. Here, we develop MERS-CoV vaccines utilizing a computationally designed protein nanoparticle platform that has generated safe and immunogenic vaccines against various enveloped viruses, including a licensed vaccine for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Two-component nanoparticles displaying spike (S)-derived antigens induce neutralizing responses and protect mice against challenge with mouse-adapted MERS-CoV. Epitope mapping reveals the dominant responses elicited by immunogens displaying the prefusion-stabilized S-2P trimer, receptor binding domain (RBD), or N-terminal domain (NTD). An RBD nanoparticle elicits antibodies targeting multiple non-overlapping epitopes in the RBD. Our findings demonstrate the potential of two-component nanoparticle vaccine candidates for MERS-CoV and suggest that this platform technology could be broadly applicable to betacoronavirus vaccine development.

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