The effect of the cell death suppressor vMIA on the production of a recombinant protein in the adenovirus-293 expression system

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Apoptosis is a major problem in animal cell cultures during production of biopharmaceuticals, such as recombinant proteins or viral vectors. A 293 cell line constitutively expressing vMIA (viral mitochondria-localized inhibitor of apoptosis) was constructed and examined on production of a model recombinant protein, green fluorescent protein (GFP) in the adenovirus-293 expression system, and on production of a model infectious adenoviral vector. vMIA-293 cells were more resistant than the parental 293 cells to apoptosis induced by either oxidative stress, or by adenovirus infection. The yield of GFP produced in vMIA-293 cell cultures was consistently higher (similar to 140%) compared to that in the parental cells. vMIA reduced production of adenovirus infectious particles, which was not due to a decline of adenovirus replication, since adenoviral DNA replication rate in vMIA-293 cells was higher than that in the parental cells. In conclusion, introduction of the vMIA gene into the 293 cell line is a promising strategy to improve recombinant protein production in the adenovirus-293 expression system.
Original languageUnknown
Pages (from-to)179-184
JournalProtein Expression And Purification
Issue number2
Publication statusPublished - 1 Jan 2009

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