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Chromatography process development aided by a dye‐based assay

Jasulaityte, G; Johansson, HJ; Bracewell, DG; (2019) Chromatography process development aided by a dye‐based assay. Journal of Chemical Technology & Biotechnology , 95 (1) pp. 132-141. 10.1002/jctb.6214. Green open access

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Abstract

BACKGROUND: The lifetime of chromatography resins typically averages between 10 and 300 cycles for the manufacture of a therapeutic protein. Developing and establishing the robustness of the method for each separation process represents a significant challenge and is subject to extensive regulatory oversight. This paper presents a novel fluorescence‐based assay for residual aggregated proteins to aid the evaluation of the extent of resin regeneration. RESULTS: The versatility of this method was demonstrated by using strong anion and cation exchange agarose resins Praesto Q and SP in conjunction with bovine serum albumin and monoclonal antibody feed materials. The assay entails applying a molecular rotor dye to a sample of free resin and measuring the fluorescence intensity using a plate reader or visualizing under a confocal laser scanning microscope to gain a more detailed characterization. Following five consecutive chromatography cycles, both methods revealed a 10‐fold increase in fluorescence intensity along with a proportional reduction in dynamic binding capacity. Furthermore, the use of the assay suggested that fouling was dependent on spatial bead position in the column, bead channel structure and cleaning conditions. CONCLUSION: This work presents a simple assay suitable for use in resin lifetime studies to enhance process understanding.

Type: Article
Title: Chromatography process development aided by a dye‐based assay
Open access status: An open access version is available from UCL Discovery
DOI: 10.1002/jctb.6214
Publisher version: https://doi.org/10.1002/jctb.6214
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: chromatography, fouling, ion exchange, proteins
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Biochemical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10081763
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