초록
<P>This study describes the development work to shorten the monoclonal antibody (mAb) production time in CHO cell cultures from 14 days to 8 days without impacting mAb titer or product quality. The proposed process increases cell inoculation densities up to 25 higher than a typical seeding density in the final production bioreactor, with the implementation of an ATF perfusion system in the N?-?1 stage. Similar antibody titer and N-glycosylation profiles were reached in 8 days using the 25 seed condition, as in 14 days using the 1 seed condition. Acidic variants in the 25 seed condition were 12-20% lower than the 1 seed condition. These results indicate that an accelerated 8-day antibody production process utilizing a 25 seeding strategy has the potential of achieving similar product quality and titer as the 1 seeding condition in a 14-day production process.</P>