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- W2022425145 abstract "We report an innovative at-line method to monitor concentration of bioactive antibody (i.e., antibody with conserved antigen-binding activity) secreted during bioreactor culture by the use of surface plasmon resonance (SPR)-based biosensor technology. In a first series of experiments, conditions for SPR-based measurements were validated off-line by monitoring bioactive antibody concentration in conditioned medium from 500-ml baffled flask hybridoma cell cultures. A fully automated experimental setup in which the SPR-based biosensor was harnessed to a bioreactor was then used at-line to monitor the concentration of bioactive antibody produced in a 3.5-L bioreactor. Quantitative SPR measurements performed both at-line and off-line were in excellent agreement with quantitative Western blotting followed by densitometry analyses. Thus, our experimental study confirms that SPR biosensors can be applied to at-line quantification of correctly folded proteins that are secreted by cells cultured in a bioreactor. Our experimental approach represents a novel and robust analytical strategy to be applied to the control and optimization of the production of bioactive secreted proteins." @default.
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- W2022425145 date "2008-07-01" @default.
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- W2022425145 title "At-line quantification of bioactive antibody in bioreactor by surface plasmon resonance using epitope detection" @default.
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- W2022425145 doi "https://doi.org/10.1016/j.ab.2008.04.019" @default.
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