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Intranasal pediatric parainfluenza virus-vectored SARS-CoV-2 vaccine candidate is protective in macaques

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  • 09/09/2025
Type of Material
Authors
    Cyril Le Nouën, National Institute of Allergy and Infectious Diseases, NIH, BethesdaChrsitine E Nelson, National Institute of Allergy and Infectious Diseases, NIH, BethesdaXueqiao Liu, National Institute of Allergy and Infectious Diseases, NIH, BethesdaHong-Su Park, National Institute of Allergy and Infectious Diseases, NIH, BethesdaYumiko Matsuoka, National Institute of Allergy and Infectious Diseases, NIH, BethesdaCindy Luongo, National Institute of Allergy and Infectious Diseases, NIH, BethesdaCelia Santos, National Institute of Allergy and Infectious Diseases, NIH, BethesdaLijuan Yang, National Institute of Allergy and Infectious Diseases, NIH, BethesdaNational Institute of Allergy and Infectious Diseases, NIH, BethesdaRicard Herbert, National Institute of Allergy and Infectious Diseases, NIH, BethesdaAshley Castens, National Institute of Allergy and Infectious Diseases, NIH, BethesdaIan Moore, Emory UniversityTemeri Wilder-Kofie, National Institute of Allergy and Infectious Diseases, NIH, BethesdaRashida Moore, Emory UniversityApril Walker, National Institute of Allergy and Infectious Diseases, NIH, BethesdaPeng Zhang, National Institute of Allergy and Infectious Diseases, NIH, BethesdaPaolo Lusso, National Institute of Allergy and Infectious Diseases, NIH, BethesdaReed F Johnson, National Institute of Allergy and Infectious Diseases, NIH, BethesdaNicole L Garza, National Institute of Allergy and Infectious Diseases, NIH, BethesdaLaura E Via, National Institute of Allergy and Infectious Diseases, NIH, BethesdaShirin Munir, National Institute of Allergy and Infectious Diseases, NIH, BethesdaDaniel Barber, National Institute of Allergy and Infectious Diseases, NIH, BethesdaUrsula J Buchholz, National Institute of Allergy and Infectious Diseases, NIH, Bethesda
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  • English
Date
  • 2022-05-23
Publisher
  • NIH
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Copyright Statement
  • The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. This article is a US Government work. It is not subject to copyright under 17 USC 105.
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Abstract
  • Pediatric SARS-CoV-2 vaccines are needed that elicit immunity directly in the airways, as well as systemically. Building on pediatric parainfluenza virus vaccines in clinical development, we generated a live-attenuated parainfluenza virus-vectored vaccine candidate expressing SARS-CoV-2 prefusion-stabilized spike (S) protein (B/HPIV3/S-6P) and evaluated its immunogenicity and protective efficacy in rhesus macaques. A single intranasal/intratracheal dose of B/HPIV3/S-6P induced strong S-specific airway mucosal IgA and IgG responses. High levels of S-specific antibodies were also induced in serum, which efficiently neutralized SARS-CoV-2 variants of concern. Furthermore, B/HPIV3/S-6P induced robust systemic and pulmonary S-specific CD4+ and CD8+ T-cell responses, including tissue-resident memory cells in lungs. Following challenge, SARS-CoV-2 replication was undetectable in airways and lung tissues of immunized macaques. B/HPIV3/S-6P will be evaluated clinically as pediatric intranasal SARS-CoV-2/parainfluenza virus type 3 vaccine.
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