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A monolith purification process for virus-like particles from yeast homogenate.

Burden, CS; Jin, J; Podgornik, A; Bracewell, DG; (2012) A monolith purification process for virus-like particles from yeast homogenate. Journal of Chromatography B , 880 (1) 82 - 89. 10.1016/j.jchromb.2011.10.044. Green open access

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Abstract

Monoliths are an alternative stationary phase format to conventional particle based media for large biomolecules. Conventional resins suffer from limited capacities and flow rates when used for viruses, virus-like particles (VLP) and other nanoplex materials. The monolith structure provides a more open pore structure to improve accessibility for these materials and better mass transport from convective flow and reduced pressure drops. To examine the performance of this format for bioprocessing we selected the challenging capture of a VLP from clarified yeast homogenate. Using a recombinant Saccharomyces cerevisiae host it was found hydrophobic interaction based separation using a hydroxyl derivatised monolith had the best performance. The monolith was then compared to a known beaded resin method, where the dynamic binding capacity was shown to be three-fold superior for the monolith with equivalent 90% recovery of the VLP. To understand the impact of the crude feed material confocal microscopy was used to visualise lipid contaminants, deriving from the homogenised yeast. It was seen that the lipid formed a layer on top of the column, even after regeneration of the column with isopropanol, resulting in increasing pressure drops with the number of operational cycles. Removal of the lipid pre-column significantly reduces the amount and rate of this fouling process. Using Amberlite/XAD-4 beads around 70% of the lipid was removed, with a loss of VLP around 20%. Applying a reduced lipid feed versus an untreated feed further increased the dynamic binding capacity of the monolith from 0.11 mg/mL column to 0.25 mg/mL column.

Type: Article
Title: A monolith purification process for virus-like particles from yeast homogenate.
Location: Netherlands
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.jchromb.2011.10.044
Publisher version: http://dx.doi.org/10.1016/j.jchromb.2011.10.044
Language: English
Additional information: This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Keywords: Ammonium Sulfate, Chromatography, Liquid, Fermentation, Hepatitis B Surface Antigens, Hydrophobic and Hydrophilic Interactions, Lipids, Microscopy, Confocal, Microscopy, Electron, Transmission, Polystyrenes, Porosity, Saccharomyces cerevisiae, Vaccines, Virus-Like Particle
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/1333870
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