Abstract
Conditionally replicating adenoviruses (CRAVs) are a group of recombinant human adenoviruses genetically engineered to replicate in selected tissues, such as tumors. These viruses could potentially offer significant medicinal benefits, since the restrictive replication of these viral vectors leads to the lysis of target cells without harm to the surrounding tissues. The in vitro propagation and amplification of the CRAV vectors often requires special host cells with deregulated growth control pathways. In order to develop an efficient cell culture process for the scaleable production of a CRAV vector, A549 cells, a human lung carcinoma cell line normally cultured in adherent culture, were adapted to suspension culture. CRAV production was demonstrated with the suspension-adapted A549 cells and a baseline production process was developed in shake flasks. The ability to scale-up virus production was confirmed in stirred tank bioreactors. Molecular characterization of the suspension-adapted A549 cells indicates no significant changes in cellular mechanisms related to adenovirus infection.
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Longley, R., Radzniak, L., Santoro, M. et al. Development of a Serum-free Suspension Process for the Production of a Conditionally Replicating Adenovirus using A549 Cells. Cytotechnology 49, 161–171 (2005). https://doi.org/10.1007/s10616-006-0008-2
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DOI: https://doi.org/10.1007/s10616-006-0008-2