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Variant SARS-CoV-2 mRNA vaccines confer broad neutralization as primary or booster series in mice
Kai Wu; Angela Choi; Matthew Koch; Sayda Elbashir; LingZhi Ma; Diana Lee; Angela Woods; Carole Henry; Charis Palandjian; Anna Hill; Hardik Jani; Julian Quinones; Naveen Nunna; Adrian B McDermott; Samantha Falcone; Elisabeth Narayanan; Tonya Colpitts; Hamilton Bennett; Kizzmekia Corbett; Robert Seder; Barney S Graham; Guillaume BE Stewart-Jones; Andrea Carfi; Darin K Edwards.
Afiliación
  • Kai Wu; Moderna, Inc
  • Angela Choi; Moderna, Inc
  • Matthew Koch; Moderna, Inc
  • Sayda Elbashir; Moderna, Inc
  • LingZhi Ma; Moderna, Inc
  • Diana Lee; Moderna, Inc
  • Angela Woods; Moderna, Inc
  • Carole Henry; Moderna, Inc
  • Charis Palandjian; Moderna, Inc
  • Anna Hill; Moderna, Inc
  • Hardik Jani; Moderna, Inc
  • Julian Quinones; Moderna, Inc
  • Naveen Nunna; Moderna, Inc
  • Adrian B McDermott; Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health
  • Samantha Falcone; Moderna, Inc
  • Elisabeth Narayanan; Moderna, Inc
  • Tonya Colpitts; Moderna, Inc
  • Hamilton Bennett; Moderna, Inc
  • Kizzmekia Corbett; Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health
  • Robert Seder; Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health
  • Barney S Graham; Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health
  • Guillaume BE Stewart-Jones; Moderna, Inc
  • Andrea Carfi; Moderna, Inc
  • Darin K Edwards; Moderna, Inc
Preprint en En | PREPRINT-BIORXIV | ID: ppbiorxiv-439482
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ABSTRACT
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the causative agent of a global pandemic. Safe and effective COVID-19 vaccines are now available, including mRNA-1273, which has shown 94% efficacy in prevention of symptomatic COVID-19 disease. However, the emergence of SARS-CoV-2 variants has led to concerns of viral escape from vaccine-induced immunity. Several variants have shown decreased susceptibility to neutralization by vaccine-induced immunity, most notably B.1.351 (Beta), although the overall impact on vaccine efficacy remains to be determined. Here, we present the initial evaluation in mice of 2 updated mRNA vaccines designed to target SARS-CoV-2 variants (1) monovalent mRNA-1273.351 encodes for the spike protein found in B.1.351 and (2) mRNA-1273.211 comprising a 11 mix of mRNA-1273 and mRNA-1273.351. Both vaccines were evaluated as a 2-dose primary series in mice; mRNA-1273.351 was also evaluated as a booster dose in animals previously vaccinated with mRNA-1273. The results demonstrated that a primary vaccination series of mRNA-1273.351 was effective at increasing neutralizing antibody titers against B.1.351, while mRNA-1273.211 was effective at providing broad cross-variant neutralization. A third (booster) dose of mRNA-1273.351 significantly increased both wild-type and B.1.351-specific neutralization titers. Both mRNA-1273.351 and mRNA-1273.211 are being evaluated in pre-clinical challenge and clinical studies.
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Texto completo: 1 Colección: 09-preprints Base de datos: PREPRINT-BIORXIV Tipo de estudio: Experimental_studies / Prognostic_studies / Rct Idioma: En Año: 2021 Tipo del documento: Preprint
Texto completo: 1 Colección: 09-preprints Base de datos: PREPRINT-BIORXIV Tipo de estudio: Experimental_studies / Prognostic_studies / Rct Idioma: En Año: 2021 Tipo del documento: Preprint