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  • Title: Interferon type I responses to virus infections in carp cells: In vitro studies on Cyprinid herpesvirus 3 and Rhabdovirus carpio infections.
    Author: Adamek M, Rakus KŁ, Chyb J, Brogden G, Huebner A, Irnazarow I, Steinhagen D.
    Journal: Fish Shellfish Immunol; 2012 Sep; 33(3):482-93. PubMed ID: 22683518.
    Abstract:
    Interferons (IFNs) are secreted mediators that play a fundamental role in the innate immune response against viruses among all vertebrate classes. Common carp is a host for two highly contagious viruses: spring viraemia of carp virus (Rhabdovirus carpio, SVCV) and the Cyprinid herpesvirus 3 (CyHV-3), which belong to Rhabdoviridae and Alloherpesviridae families, respectively. Both viruses are responsible for significant losses in carp aquaculture. In this paper we studied the mRNA expression profiles of genes encoding for proteins promoting various functions during the interferon pathway, from pattern recognition receptors to antiviral genes, during in vitro viral infection. Furthermore, we investigated the impact of the interferon pathway (stimulated with poly I:C) on CyHV-3 replication and the speed of virus spreading in cell culture. The results showed that two carp viruses, CyHV-3 and SVCV induced fundamentally different type I IFN responses in CCB cells. SVCV induced a high response in all studied genes, whereas CyHV-3 seems to induce no response in CCB cells, but it induces a response in head kidney leukocytes. The lack of an IFN type I response to CyHV-3 could be an indicator of anti-IFN actions of the virus, however the nature of this mechanism has to be evaluated in future studies. Our results also suggest that an activation of type I IFN in CyHV-3 infected cells can limit the spread of the virus in cell culture. This would open the opportunity to treat the disease associated with CyHV-3 by an application of poly I:C in certain cases.
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