Protective effect of a polyvalent influenza DNA vaccine in pigs
Karlsson, Ingrid
Borggren, Marie
Rosenstierne, Maiken Worsøe
Trebbien, Ramona
Williams, James A.
Vidal Barba, Enric (Institut de Recerca i Tecnologia Agroalimentàries. Centre de Recerca en Sanitat Animal)
Vergara-Alert, Júlia (Institut de Recerca i Tecnologia Agroalimentàries. Centre de Recerca en Sanitat Animal)
Solanes Foz, David (Institut de Recerca i Tecnologia Agroalimentàries. Centre de Recerca en Sanitat Animal)
Darji, Ayub (Institut de Recerca i Tecnologia Agroalimentàries. Centre de Recerca en Sanitat Animal)
Sisteré-Oró, Marta (Institut de Recerca i Tecnologia Agroalimentàries. Centre de Recerca en Sanitat Animal)
Segalés Coma, Joaquim (Universitat Autònoma de Barcelona. Departament de Sanitat i d'Anatomia Animals)
Nielsen, Jens
Fomsgaard, Anders

Date:	2018
Abstract:	Influenza A virus in swine herds represents a major problem for the swine industry and poses a constant threat for the emergence of novel pandemic viruses and the development of more effective influenza vaccines for pigs is desired. By optimizing the vector backbone and using a needle-free delivery method, we have recently demonstrated a polyvalent influenza DNA vaccine that induces a broad immune response, including both humoral and cellular immunity. To investigate the protection of our polyvalent influenza DNA vaccine approach in a pig challenge study. By intradermal needle-free delivery to the skin, we immunized pigs with two different doses (500 μg and 800 μg) of an influenza DNA vaccine based on six genes of pandemic origin, including internally expressed matrix and nucleoprotein and externally expressed hemagglutinin and neuraminidase as previously demonstrated. Two weeks following immunization, the pigs were challenged with the 2009 pandemic H1N1 virus. When challenged with 2009 pandemic H1N1, 0/5 vaccinated pigs (800 μg DNA) became infected whereas 5/5 unvaccinated control pigs were infected. The pigs vaccinated with the low dose (500 μg DNA) were only partially protected. The DNA vaccine elicited binding-, hemagglutination inhibitory (HI) − as well as cross-reactive neutralizing antibody activity and neuraminidase inhibiting antibodies in the immunized pigs, in a dose-dependent manner. The present data, together with the previously demonstrated immunogenicity of our influenza DNA vaccine, indicate that naked DNA vaccine technology provides a strong approach for the development of improved pig vaccines, applying realistic low doses of DNA and a convenient delivery method for mass vaccination.
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Challenge ; DNA vaccine ; H1N1pdm09 ; Needle-free immunization ; Protection ; Swine influenza
Published in:	Veterinary Immunology and Immunopathology, Vol. 195 (january 2018) , p. 25-32, ISSN 1873-2534

DOI: 10.1016/j.vetimm.2017.11.007
PMID: 29249314

8 p, 465.3 KB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Health sciences and biosciences > Centre de Recerca en Sanitat Animal (CReSA-IRTA)
Articles > Research articles
Articles > Published articles