Relationship between cell size, cell cycle and specific recombinant protein productivity
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Centrifugal elutriation was used to produce cell cycle enrichedfractions of four commercially relevant recombinant cell lines,chosen to allow for variation in properties due to construct,expression system and parent cell type, from normally growingheterogeneous batch cultures. As these fractions had identicalculture histories and had not been subjected to any insult orstress which was likely to have adversely affected cellularmetabolism, they were ideal for further study of cellularproperties. Specific productivity, cell size and cell cyclestate of replicate elutriated fractions were measured for eachcell line. Results showed that cell size was the major cellulardeterminant of productivity for all cell lines examined. Productformation was not restricted to any particular cell cycle phaseand in all cases, production occurred irrespective of cell cyclephase. Specific productivity was lowest when the majority ofcells in the fraction were G1, intermediate when themajority of cells in the fraction were S phase and greater whenthe majority of cells in the fraction were in G2/M. However, the evidence suggests that size is the major cellulardeterminant of productivity; the apparent relationship betweencell cycle and productivity is secondary and can simply beascribed to the increasing size of cells as they progress thoughthe cell cycle. Thus, in addition to cell density and viabilitycell size is the cellular parameter which should be incorporatednot only into mathematical models of recombinant mammalian cellproduction processes but also into process monitoring andcontrol strategies.
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- Relationship between cell size, cell cycle and specific recombinant protein productivity
Volume 34, Issue 1-2 , pp 59-70
- Cover Date
- Print ISSN
- Online ISSN
- Kluwer Academic Publishers
- Additional Links
- cell cycle
- cell size
- centrifugal elutriation
- flow cytometry
- Industry Sectors
- Author Affiliations
- 1. School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, B15 2TT, U.K.
- 2. School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, B15 2TT, U.K.