Establishing 293T suspension cultrue for lentiviral vector production in
a stirred bioreactor
Abstract
293T suspensions cells were first cultured in a big bubble-stirred
bioreactors for large-scale lentivirus vectors (LV) production in the
study. Direct domesticated approaches were utilized for 293 suspensions
cells. We validated of the ability to LV package and drew a growth curve
in shake flask. The results show 293T suspension culture was successful,
and also retained the capacity for LV production. After facile
optimization of the viral package and cryopreservation conditions, 293T
suspension cells were inoculated in a 5.5 L bioreactor. Packaged
CAR-CD30 lentivirus yield was close to that from the original shake
flask culture. Cultivation for 4 days in the bioreactor enabled
production of 1.5±0.3×107 TU/mL coarse LV and the lentiviral infection
efficiency was 48.6±2.8% in T Cells. The process has merits of low cost
as well as more effective, and expected to be highly competitive
compared to other bioreactors.