Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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    Different transcriptional response between susceptible and resistant common carp (Cyprinus carpio) fish hints on the mechanism of CyHV-3 disease resistance
    Tadmor-Levi, Roni ; Doron-faigenboim, Adi ; Marcos-hadad, Evgeniya ; Petit, Jules ; Hulata, Gideon ; Forlenza, Maria ; Wiegertjes, Geert F. ; David, Lior - \ 2019
    BMC Genomics 20 (2019)1. - ISSN 1471-2164
    Infectious disease outbreaks form major setbacks to aquaculture production and to further development of this important sector. Cyprinid herpes virus-3 (CyHV-3) is a dsDNA virus widely hampering production of common carp (Cyprinus carpio), one of the most farmed fish species worldwide. Genetically disease resistant strains are highly sought after as a sustainable solution to this problem. To study the genetic basis and cellular pathways underlying disease resistance, RNA-Seq was used to characterize transcriptional responses of susceptible and resistant fish at day 4 after CyHV-3 infection.
    Intra-muscular and oral vaccination using a Koi Herpesvirus ORF25 DNA vaccine does not confer protection in common carp (Cyprinus carpio L.)
    Embregts, Carmen W.E. ; Tadmor-Levi, Roni ; Veselý, Tomáš ; Pokorová, Dagmar ; David, Lior ; Wiegertjes, Geert F. ; Forlenza, Maria - \ 2019
    Fish and Shellfish Immunology 85 (2019). - ISSN 1050-4648 - p. 90 - 98.
    Cohabitation challenge - DNA vaccine - KHV ORF25 - KHV surface glycoprotein - Oral vaccination
    Koi Herpes Virus (KHV or Cyprinid Herpesvirus 3, CyHV-3) is among the most threatening pathogens affecting common carp production as well as the highly valuable ornamental koi carp. To date, no effective commercial vaccine is available for worldwide use. A previous study reported that three intramuscular injections with an ORF25-based DNA vaccine, led to the generation of neutralizing antibodies and conferred significant protection against an intraperitoneal challenge with KHV. In the present study, we set out to optimize an ORF25-based DNA vaccination protocol that required fewer injections and would confer protection upon a challenge that better resembled the natural route of infection. To this end, ORF25 was cloned in pcDNA3 either as a soluble protein or as a full-length transmembrane GFP-fusion protein. We tested our ORF25-based DNA vaccines in multiple vaccination trials using different doses, vaccination routes (i.m. injection and oral gavage) and challenge methods (bath and cohabitation). Furthermore, we analysed local and systemic responses to the i.m. injected DNA vaccine through histological and RT-qPCR analysis. We observed a strong protection when fish received three injections of either of the two DNA vaccines. However, this protection was observed only after bath challenge and not after cohabitation challenge. Furthermore, protection was insufficient when fish received one injection only, or received the plasmid orally. The importance of choosing a challenge model that best reflects the natural route of infection and the possibility to include additional antigens in future DNA vaccination strategies against KHV will be discussed.
    Development of DNA vaccine against KHV and characterization of immune responses after intramuscular and oral vaccination
    Embregts, C.W.E. ; Veselý, T. ; David, Lior ; Tadmor-Levi, Roni ; Wiegertjes, G. ; Forlenza, M. - \ 2017
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