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- W1992235175 abstract "The development of gene therapy is hampered by the difficulty of producing large stocks of retroviral vectors at high titer. This study aimed to improve culture conditions and to intensify the production of retroviruses by FLYRD18, a packaging cell line derived from the HT1080 human fibrosarcoma line. Batch virus production proved to be feasible in unsupplemented basal medium and provided significantly higher titers and productivities than medium supplemented with 10% serum. For longer-term production, however, AIM-V complete serum-free medium and basal medium supplemented with 2% serum gave superior results. Serum supplementation should nevertheless be optimized to take into account the presence of inhibitors of viral production. In monolayer cultures with 0.2 mL/cm(2), the cell concentration was increased up to 2 x 10(6) cells/mL without loss of cell productivity. A semicontinuous production process, which enables the collection of larger amounts of viruses from the same culture, has also been successfully used. Suspension culture processes were prevented by the anchorage dependency of the FLYRD18 cell line. Microcarrier cultures were able to produce viruses but will require further investigation and optimization for their performance to become competitive with monolayer cultures. In the course of this study, more than a 10-fold increase of titer has been achieved." @default.
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- W1992235175 date "1999-01-01" @default.
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- W1992235175 title "Production of Retroviral Vectors for Gene Therapy with the Human Packaging Cell Line FLYRD18" @default.
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- W1992235175 doi "https://doi.org/10.1021/bp990085b" @default.
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