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  Influence of host cell defence during influenza vaccine production in cell culture

Frensing, T., Seitz, C., Heynisch, B., & Reichl, U. (2010). Influence of host cell defence during influenza vaccine production in cell culture. Poster presented at 4th European Congress of Virology, Cernobbio, Como Lake, Italy.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-8FD2-4 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0025-1B96-C
Genre: Poster

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 Creators:
Frensing, T.1, Author              
Seitz, C.1, Author              
Heynisch, B.1, Author              
Reichl, U.1, 2, Author              
Affiliations:
1Bioprocess Engineering, Max Planck Institute for Dynamics of Complex Technical Systems, Max Planck Society, ou_1738140              
2Otto-von-Guericke-Universität Magdeburg, ou_1738156              

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 Abstract: INFLUENCE OF HOST CELL DEFENCE DURING INFLUENZA VACCINE PRODUCTION IN CELL CULTURE Background. For cell culture-based Influenza vaccine production virus yield optimisation is of crucial importance. In particular, with the recent threat of the new H1N1 pandemic, not only seasonal vaccines but also pre-/pandemic vaccines have to be supplied in large quantities. In vivo influenza replication is limited by the immune system, but for production cell lines the impact of defence mechanisms on virus yield is unknown. Methods. Interferon (IFN) response and subsequent induction of the antiviral state was monitored in influenza-infected adherent Madin-Darby canine kidney (MDCK) cells by real-time PCR. Stimulation and inhibition of the host cell defence were performed analysing its impact on virus yields. Results. Virus yield and host cell signalling intensity were strain-dependent. By over-expression of viral antagonists IFN-signalling could be reduced up to 90%. However, maximum virus titre determined by real-time PCR and HA-assay was not altered significantly. Stimulation of the antiviral state by conditioned medium led to enhanced IFN-signalling, which initially slowed down virus replication but had only minor effects on final virus titres. Interestingly, minireplicon assays revealed that canine Mx proteins are lacking the antiviral activity against influenza of their human or mouse counterparts. Conclusions. For MDCK cell culture-based influenza vaccine production host cell defence mechanisms seem to play only a minor role for final virus yields. Antiviral mechanisms of these epithelial cells may slow down influenza replication, which in vivo gains time for the immune system to be activated, but do not reduce maximum virus titres obtained in the bioprocess.

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Language(s): eng - English
 Dates: 2010
 Publication Status: Not specified
 Pages: -
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 Rev. Method: -
 Identifiers: eDoc: 476635
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Title: 4th European Congress of Virology
Place of Event: Cernobbio, Como Lake, Italy
Start-/End Date: 2010-04-07 - 2010-04-11

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