Murakami S, Horimoto T, Yamada S, Kakugawa S, Goto. Establishment of Canine RNA Polymerase I-Driven Reverse Genetics for Influenza A Virus: its Application for H5N1 Vaccine Production. J Virol. 2007 Nov 28
In the event of a new influenza pandemic, vaccines whose antigenicities match circulating strains must be rapidly produced. Here, we established an alternative reverse genetics system for influenza virus using the canine polymerase I (PolI) promoter sequence that works efficiently in the Madin-Darby canine kidney cell line - a cell line approved for human vaccine production. Using this system, we were able to generate H5N1 vaccine seed viruses more efficiently than can be achieved with the current system that uses the human PolI promoter in African green monkey Vero cells, thus improving pandemic vaccine production.
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