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Immunisation efficacy of a stabilised SARS-CoV-2 spike glycoprotein in two geriatric animal models
Usai, Carla (Unitat mixta d'investigació IRTA-UAB en Sanitat Animal. Centre de Recerca en Sanitat Animal)
Ainsua-Enrich, Erola (Institut Germans Trias i Pujol. Institut de Recerca de la Sida IrsiCaixa)
Urrea, Víctor (Institut Germans Trias i Pujol. Institut de Recerca de la Sida IrsiCaixa)
Pradenas, Edwards (Institut Germans Trias i Pujol. Institut de Recerca de la Sida IrsiCaixa)
Lorca-Oró, Cristina (Unitat mixta d'investigació IRTA-UAB en Sanitat Animal. Centre de Recerca en Sanitat Animal)
Tarrés-Freixas, Ferran (Unitat mixta d'investigació IRTA-UAB en Sanitat Animal. Centre de Recerca en Sanitat Animal)
Roca, Núria (Unitat mixta d'investigació IRTA-UAB en Sanitat Animal. Centre de Recerca en Sanitat Animal)
Pérez, Mónica (Unitat mixta d'investigació IRTA-UAB en Sanitat Animal. Centre de Recerca en Sanitat Animal)
Avila-Nieto, Carlos (Institut Germans Trias i Pujol. Institut de Recerca de la Sida IrsiCaixa)
Rodríguez de la Concepción, María Luisa (Institut Germans Trias i Pujol. Institut de Recerca de la Sida IrsiCaixa)
Pedreño-López, Núria (Institut Germans Trias i Pujol. Institut de Recerca de la Sida IrsiCaixa)
Carabelli, Julieta (Institut Germans Trias i Pujol. Institut de Recerca de la Sida IrsiCaixa)
Trinité, Benjamin (Institut Germans Trias i Pujol. Institut de Recerca de la Sida IrsiCaixa)
Ballana, Ester (Institut Germans Trias i Pujol. Institut de Recerca de la Sida IrsiCaixa)
Riveira-Muñoz, Eva (Institut Germans Trias i Pujol. Institut de Recerca de la Sida IrsiCaixa)
Izquierdo Useros, Nuria (Instituto de Salut Carlos III. CIBERINFEC)
Clotet Sala, Bonaventura (Fundació Lluita contra les Infeccions)
Blanco, Julià (Universitat de Vic - Universitat Central de Catalunya)
Guallar, Victor (Institució Catalana de Recerca i Estudis Avançats)
Cantero, Guillermo (Unitat mixta d'investigació IRTA-UAB en Sanitat Animal. Centre de Recerca en Sanitat Animal)
Vergara-Alert, Júlia (Unitat mixta d'investigació IRTA-UAB en Sanitat Animal. Centre de Recerca en Sanitat Animal)
Carrillo, Jorge (Instituto de Salut Carlos III. CIBERINFEC)
Segalés Coma, Joaquim (Universitat Autònoma de Barcelona. Departament de Sanitat i d'Anatomia Animals)

Date: 2024
Abstract: Age is associated with reduced efficacy of vaccines and linked to higher risk of severe COVID-19. Here we determined the impact of ageing on the efficacy of a SARS-CoV-2 vaccine based on a stabilised Spike glycoprotein (S-29) that had previously shown high efficacy in young animals. Thirteen to 18-month-old golden Syrian hamsters (GSH) and 22-23-month-old K18-hCAE2 mice were immunised twice with S-29 protein in AddaVax TM adjuvant. GSH were intranasally inoculated with SARS-CoV-2 either two weeks or four months after the booster dose, while all K18-hACE2 mice were intranasally inoculated two weeks after the second immunisation. Body weight and clinical signs were recorded daily post-inoculation. Lesions and viral load were investigated in different target tissues. Immunisation induced seroconversion and production of neutralising antibodies; however, animals were only partially protected from weight loss. We observed a significant reduction in the amount of viral RNA and a faster viral protein clearance in the tissues of immunized animals. Infectious particles showed a faster decay in vaccinated animals while tissue lesion development was not altered. In GSH, the shortest interval between immunisation and inoculation reduced RNA levels in the lungs, while the longest interval was equally effective in reducing RNA in nasal turbinates; viral nucleoprotein amount decreased in both tissues. In mice, immunisation was able to improve the survival of infected animals. Despite the high protection shown in young animals, S-29 efficacy was reduced in the geriatric population. Our research highlights the importance of testing vaccine efficacy in older animals as part of preclinical vaccine evaluation.
Note: Altres ajuts: Grífols (CBIG), Direcció General de Recerca i Innovació en Salut (SLD0015 and SDL0016) and Crowdfunding "yomecorono.com".
Rights: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. Creative Commons
Language: Anglès
Document: Article ; recerca ; Versió publicada
Subject: Respiratory tract diseases ; Experimental models of disease
Published in: NPJ Vaccines, Vol. 9 (february 2024) , ISSN 2059-0105

DOI: 10.1038/s41541-024-00840-0
PMID: 38413645


12 p, 2.8 MB

The record appears in these collections:
Articles > Research articles
Articles > Published articles

 Record created 2024-04-19, last modified 2024-05-10



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