Journal
BIOPROCESS ENGINEERING
Volume 23, Issue 3, Pages 229-233Publisher
SPRINGER
DOI: 10.1007/s004499900156
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Understanding the effect of hydrodynamic shear forces on microcarrier-attached cells is critical in several viral vaccine production processes, owing to that only the anchorage-dependent cells can be used for virus propagation in cultures. This study demonstrated that increasing the hydrodynamic shear forces in microcarrier cultures can increase the production of a vaccine strain of Japanese encephalitis virus ton a per cell basis) in Vero cells but not BHK-21. The shear force-enhanced JEV production were highly effective at around 2-3 d post infection and required the concentration of fetal bovine serum supplemented in medium above 2.5%. To our knowledge, this study reports for the first time that increasing the hydrodynamic shear forces on microcarrier-grown cells increases virus production in agitated bioreactor cultures.
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