The suitability of DEAE-Cl active groups on customized poly(GMA-co-EDMA) continuous stationary phase for fast enzyme-free isolation of plasmid DNA

Danquah, Michael K. & Forde, Gareth M. (2007) The suitability of DEAE-Cl active groups on customized poly(GMA-co-EDMA) continuous stationary phase for fast enzyme-free isolation of plasmid DNA. Journal of Chromatography B : Analytical Technologies in the Biomedical and Life Sciences, 853(1-2), pp. 38-46.

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The creation of a commercially viable and a large-scale purification process for plasmid DNA (pDNA) production requires a whole-systems continuous or semi-continuous purification strategy employing optimised stationary adsorption phase(s) without the use of expensive and toxic chemicals, avian/bovine-derived enzymes and several built-in unit processes, thus affecting overall plasmid recovery, processing time and economics. Continuous stationary phases are known to offer fast separation due to their large pore diameter making large molecule pDNA easily accessible with limited mass transfer resistance even at high flow rates. A monolithic stationary sorbent was synthesised via free radical liquid porogenic polymerisation of ethylene glycol dimethacrylate (EDMA) and glycidyl methacrylate (GMA) with surface and pore characteristics tailored specifically for plasmid binding, retention and elution. The polymer was functionalised with an amine active group for anion-exchange purification of pDNA from cleared lysate obtained from E. coli DH5α-pUC19 pellets in RNase/protease-free process. Characterization of the resin showed a unique porous material with 70% of the pores sizes above 300 nm. The final product isolated from anion-exchange purification in only 5 min was pure and homogenous supercoiled pDNA with no gDNA, RNA and protein contamination as confirmed with DNA electrophoresis, restriction analysis and SDS page. The resin showed a maximum binding capacity of 15.2 mg/mL and this capacity persisted after several applications of the resin. This technique is cGMP compatible and commercially viable for rapid isolation of pDNA.

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ID Code: 81566
Item Type: Journal Article
Refereed: Yes
Keywords: Enzyme-free process, Fast purification, Methacrylate monolith, Plasmid DNA, Methacrylate monoliths, Adsorption, DNA, Enzymes, Ethylene glycol, Mass transfer, Polymerization, Purification, Biomedical engineering, 2 chloro n, n diethylethylamine, amine, diethylamine, ethylene glycol dimethacrylate, glycidyl methacrylate, methacrylic acid derivative, resin, unclassified drug, anion exchange, article, cell lysate, DNA isolation, Escherichia coli, flow rate, nonhuman, plasmid, polyacrylamide gel electrophoresis, porosity, priority journal, synthesis, Chromatography, Ion Exchange, Ethanolamines, Hydrogen-Ion Concentration, Methacrylates, Microscopy, Electron, Scanning, Molecular Structure, Plasmids, Polymers, Reproducibility of Results
DOI: 10.1016/j.jchromb.2007.02.050
ISSN: 1570-0232
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2007 Elsevier B.V.
Deposited On: 05 Feb 2015 23:21
Last Modified: 11 Feb 2015 05:24

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