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Nair A, Loveday KA, Kenyon C, Qu J, Kis Z. Quality by Digital Design for Developing Platform RNA Vaccine and Therapeutic Manufacturing Processes. Methods Mol Biol 2024; 2786:339-364. [PMID: 38814403 DOI: 10.1007/978-1-0716-3770-8_16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2024]
Abstract
Quality by digital design (QbDD) utilizes data-driven, mechanistic, or hybrid models to define and optimize a manufacturing design space. It improves upon the QbD approach used extensively in the pharmaceutical industry. The computational models developed in this approach identify and quantify the relationship between the product's critical quality attributes (CQAs) and the critical process parameters (CPPs) of unit operations within the manufacturing process. This chapter discusses the QbDD approach in developing and optimizing unit operations such as in vitro transcription, tangential flow filtration, affinity chromatography, and lipid nanoparticle (LNP) formulation in mRNA vaccine manufacturing. QbDD can be an efficient framework for developing a production process for a disease-agnostic product that requires extensive experimental and model-based process-product interaction characterization during the early process development phase.
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Affiliation(s)
- Adithya Nair
- Department of Biological and Chemical Engineering, University of Sheffield, Sheffield, UK
| | - Kate A Loveday
- Department of Biological and Chemical Engineering, University of Sheffield, Sheffield, UK
| | - Charlotte Kenyon
- Department of Biological and Chemical Engineering, University of Sheffield, Sheffield, UK
| | - Jixin Qu
- Department of Biological and Chemical Engineering, University of Sheffield, Sheffield, UK
| | - Zoltán Kis
- Department of Biological and Chemical Engineering, University of Sheffield, Sheffield, UK.
- Department of Chemical Engineering, Imperial College London, London, UK.
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Mi X, Wang SC, Winters MA, Carta G. Protein adsorption on core-shell resins for flow-through purifications: Effect of protein molecular size, shape, and salt concentration. Biotechnol Prog 2023; 39:e3300. [PMID: 36101005 DOI: 10.1002/btpr.3300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 08/12/2022] [Accepted: 09/07/2022] [Indexed: 11/10/2022]
Abstract
This work addresses the functional properties of the core-shell resins Capto Core 400 and 700 for a broad range of proteins spanning 66.5 to 660 kDa in molecular mass, including bovine serum albumin (BSA) in monomer and dimer form, fibronectin, thyroglobulin, and BSA conjugates with 10 and 30 kDa poly(ethylene glycol) chains. Negatively charged latex nanoparticles (NPs) with nominal diameters of 20, 40, and 100 nm are also studied as surrogates for bioparticles. Protein binding and its trends with respect to salt concentration depend on the protein size and are different for the two agarose-based multimodal resins. For the smaller proteins, the amount of protein bound over practical time scales is limited by the resin surface area and is larger for Capto Core 400 compared with Capto Core 700. For the larger proteins, diffusion is severely restricted in Capto Core 400, resulting in lower binding capacities than those observed for Capto Core 700 despite the larger surface area. Adding 500 mM NaCl reduces the local bound protein concentration and diffusional hindrance resulting in higher binding capacities for the large proteins in Capto Core 400 compared with low ionic strength conditions. The NPs are essentially completely excluded from the Capto Core 400 pores. However, 20 and 40 nm NPs bind significantly to Capto Core 700, further hindering protein diffusion. A model is provided to predict the dynamic binding capacities as a function of residence time.
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Affiliation(s)
- Xue Mi
- Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia, USA
| | - Sheng-Ching Wang
- Vaccine Process Research & Development, Merck & Co., Inc., West Point, Pennsylvania, USA
| | - Michael A Winters
- Vaccine Process Research & Development, Merck & Co., Inc., West Point, Pennsylvania, USA
| | - Giorgio Carta
- Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia, USA
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3
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Fuks PE, Carta G. Preparation and characterization of agarose-encapsulated ceramic hydroxyapatite particles for flow-through chromatography. SEP SCI TECHNOL 2022. [DOI: 10.1080/01496395.2022.2026388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Preston E. Fuks
- Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia, USA
| | - Giorgio Carta
- Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia, USA
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Fei C, Gao J, Fei C, Ma L, Zhu W, He L, Wu Y, Song S, Li W, Zhou J, Liao G. A flow-through chromatography purification process for Vero cell-derived influenza virus (H7N9). J Virol Methods 2021; 301:114408. [PMID: 34896455 DOI: 10.1016/j.jviromet.2021.114408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 10/29/2021] [Accepted: 12/07/2021] [Indexed: 11/29/2022]
Abstract
Immunization is the most effective way to respond to an influenza epidemic. To produce Vero cell-derived influenza vaccines, a more efficient, stable and economical purification process is required. In this study, we purified the H7N9 influenza virus grown in Vero cells that were cultured in a serum-free medium by using a combination of anion exchange chromatography (AEC) and ligand-activated core chromatography (LCC), which avoids the virus capture step. After purification, 99.95 % host cell DNA (hcDNA) (final concentration: 28.69 pg/dose) and 98.87 % host cell protein (HCP) (final concentration: 28.28 ng/dose) were removed. The albumin content was 11.36 ng/dose. All these remnants met the current Chinese Pharmacopoeia and WHO requirements. The final virus recovery rate was 58.74 %, with the concentration of hemagglutinin recorded at 132.12 μg/mL. The flow-through chromatography purification process represents an alternative to the existing processes for cell-derived influenza viruses and might be suitable for the purification of other viruses as well.
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Affiliation(s)
- ChengRui Fei
- Institute of Medical Biology, Chinese Academy of Medical Science and Peking Union Medical College, Kunming, 650118, China
| | - JingXia Gao
- Institute of Medical Biology, Chinese Academy of Medical Science and Peking Union Medical College, Kunming, 650118, China
| | - ChengHua Fei
- Kunming Maternal and Child Health Hospital, 650031, China
| | - Lei Ma
- Institute of Medical Biology, Chinese Academy of Medical Science and Peking Union Medical College, Kunming, 650118, China
| | - WenYong Zhu
- Institute of Medical Biology, Chinese Academy of Medical Science and Peking Union Medical College, Kunming, 650118, China
| | - LingYu He
- Institute of Medical Biology, Chinese Academy of Medical Science and Peking Union Medical College, Kunming, 650118, China
| | - YaNan Wu
- Institute of Medical Biology, Chinese Academy of Medical Science and Peking Union Medical College, Kunming, 650118, China
| | - ShaoHui Song
- Institute of Medical Biology, Chinese Academy of Medical Science and Peking Union Medical College, Kunming, 650118, China
| | - WeiDong Li
- Institute of Medical Biology, Chinese Academy of Medical Science and Peking Union Medical College, Kunming, 650118, China
| | - Jian Zhou
- Institute of Medical Biology, Chinese Academy of Medical Science and Peking Union Medical College, Kunming, 650118, China.
| | - GuoYang Liao
- Institute of Medical Biology, Chinese Academy of Medical Science and Peking Union Medical College, Kunming, 650118, China.
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5
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Mi X, Fuks P, Wang SC, Winters MA, Carta G. Protein Adsorption on Core-shell Particles: Comparison of Capto™ Core 400 and 700 Resins. J Chromatogr A 2021; 1651:462314. [PMID: 34144396 DOI: 10.1016/j.chroma.2021.462314] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/26/2021] [Accepted: 05/29/2021] [Indexed: 01/15/2023]
Abstract
Structural and functional characteristics of the two core-shell resins Capto™ Core 400 and 700, which are useful for the flow-through purification of bioparticles such as viruses, viral vectors, and vaccines, are compared using bovine serum albumin (BSA) and thyroglobulin (Tg) as models for small and large protein contaminants. Both resins are agarose-based and contain an adsorbing core surrounded by an inert shell. Although shell thicknesses are comparable (3.6 and 4.2 µm for Capto Core 400 and 700, respectively), the two resins differ substantially in pore size (pore radii of 19 and 50 nm, respectively). Because of the smaller pores and higher surface area, the BSA binding capacity of Capto Core 400 is approximately double that of Capto Core 700. However, for the much larger Tg, the attainable capacity is substantially larger for Capto Core 700. Mass transfer in both resins is affected by diffusional resistances through the shell and within the adsorbing core. For BSA, core and shell effective pore diffusivities are about 0.25 × 10-7 and 0.6 × 10-7 cm2/s, respectively, for Capto Core 400, and about 1.6 × 10-7 and 2.6 × 10-7 cm2/s, respectively, for Capto Core 700. These values decrease dramatically for Tg to 0.022 × 10-7 and 0.088 × 10-7 cm2/s and to 0.13 × 10-7 and 0.59 × 10-7 cm2/s for Capto Core 400 and 700, respectively. Adsorbed Tg further hinders diffusion of BSA in both resins. Column measurements show that, despite the higher static capacity of Capto Core 400 for BSA, the dynamic binding capacity is greater for Capto Core 700 as a result of its faster kinetics. However, some of this advantage is lost if the feed is a mixture of BSA and Tg since, in this case, Tg binding leads to greater diffusional hindrance for BSA.
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Affiliation(s)
- Xue Mi
- Department of Chemical Engineering, University of Virginia, Charlottesville, VA, USA
| | - Preston Fuks
- Department of Chemical Engineering, University of Virginia, Charlottesville, VA, USA
| | - Sheng-Ching Wang
- Vaccine Process Research and Development, Merck & Co., Inc., West Point, PA, USA
| | - Michael A Winters
- Vaccine Process Research and Development, Merck & Co., Inc., West Point, PA, USA
| | - Giorgio Carta
- Department of Chemical Engineering, University of Virginia, Charlottesville, VA, USA.
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Sánchez-Trasviña C, Fuks P, Mushagasha C, Kimerer L, Mayolo-Deloisa K, Rito-Palomares M, Carta G. Structure and functional properties of Capto™ Core 700 core-shell particles. J Chromatogr A 2020; 1621:461079. [DOI: 10.1016/j.chroma.2020.461079] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 03/23/2020] [Accepted: 03/25/2020] [Indexed: 01/13/2023]
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Purification of supercoiled p53-encoding plasmid using an arginine-modified macroporous support. J Chromatogr A 2020; 1618:460890. [DOI: 10.1016/j.chroma.2020.460890] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 01/02/2020] [Accepted: 01/13/2020] [Indexed: 12/19/2022]
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8
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Yotani T, Yamada Y, Arai E, Tian Y, Gotoh M, Komiyama M, Fujimoto H, Sakamoto M, Kanai Y. Novel method for DNA methylation analysis using high-performance liquid chromatography and its clinical application. Cancer Sci 2018; 109:1690-1700. [PMID: 29520901 PMCID: PMC5980336 DOI: 10.1111/cas.13566] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 02/17/2018] [Accepted: 02/25/2018] [Indexed: 12/21/2022] Open
Abstract
The aim of this study was to develop a new methodology that is suitable for DNA methylation diagnostics and to demonstrate its clinical applicability. We developed a new anion-exchange column for high-performance liquid chromatography (HPLC) with electrostatic and hydrophobic properties. Both cytosine and thymine, corresponding to methylated and unmethylated cytosine after bisulfite modification, respectively, are captured by electrostatic interaction and then discriminated from each other by their hydrophobic interactions. The DNA methylation levels of synthetic DNA were quantified accurately and reproducibly within 10 minutes without time-consuming pretreatment of PCR products, and the measured values were unaffected by the distribution of methylated CpG within the synthetic DNA fragments. When the DNA methylation status of the FAM150A gene, a marker of the CpG island methylator phenotype specific to clear cell renal cell carcinoma (ccRCC), was examined in 98 patients with ccRCC, bulk specimens of tumorous tissue including cancer cells showing DNA methylation of the FAM150A gene were easily identifiable by simply viewing the differentiated chromatograms, even when the cancer cell content was low. Sixteen ccRCC showing DNA methylation more frequently exhibited clinicopathological parameters reflecting tumor aggressiveness (ie, a larger diameter, higher histological grade, vascular involvement, renal vein tumor thrombi, infiltrating growth, tumor necrosis, renal pelvis invasion and higher pathological TNM stage), and had significantly lower recurrence-free and overall survival rates. These data indicate that HPLC analysis using this newly developed anion-exchange column could be a powerful tool for DNA methylation diagnostics, including prognostication of patients with cancers, in a clinical setting.
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Affiliation(s)
- Takuya Yotani
- Department of PathologyKeio University School of MedicineTokyoJapan
- Tsukuba Research InstituteResearch and Development DivisionSekisui Medical Co., Ltd.RyugasakiJapan
- Division of Molecular PathologyNational Cancer Center Research InstituteTokyoJapan
| | - Yuriko Yamada
- Tsukuba Research InstituteResearch and Development DivisionSekisui Medical Co., Ltd.RyugasakiJapan
- Division of Molecular PathologyNational Cancer Center Research InstituteTokyoJapan
| | - Eri Arai
- Department of PathologyKeio University School of MedicineTokyoJapan
- Division of Molecular PathologyNational Cancer Center Research InstituteTokyoJapan
| | - Ying Tian
- Department of PathologyKeio University School of MedicineTokyoJapan
| | - Masahiro Gotoh
- Division of Molecular PathologyNational Cancer Center Research InstituteTokyoJapan
| | | | | | - Michiie Sakamoto
- Department of PathologyKeio University School of MedicineTokyoJapan
| | - Yae Kanai
- Department of PathologyKeio University School of MedicineTokyoJapan
- Division of Molecular PathologyNational Cancer Center Research InstituteTokyoJapan
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Ng HW, Lee MFX, Chua GK, Gan BK, Tan WS, Ooi CW, Tang SY, Chan ES, Tey BT. Size-selective purification of hepatitis B virus-like particle in flow-through chromatography: Types of ion exchange adsorbent and grafted polymer architecture. J Sep Sci 2018; 41:2119-2129. [PMID: 29427396 DOI: 10.1002/jssc.201700823] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 01/08/2018] [Accepted: 01/26/2018] [Indexed: 11/09/2022]
Abstract
Hepatitis B virus-like particles expressed in Escherichia coli were purified using anion exchange adsorbents grafted with polymer poly(oligo(ethylene glycol) methacrylate) in flow-through chromatography mode. The virus-like particles were selectively excluded, while the relatively smaller sized host cell proteins were absorbed. The exclusion of virus-like particles was governed by the accessibility of binding sites (the size of adsorbents and the charge of grafted dextran chains) as well as the architecture (branch-chain length) of the grafted polymer. The branch-chain length of grafted polymer was altered by changing the type of monomers used. The larger adsorbent (90 μm) had an approximately twofold increase in the flow-through recovery, as compared to the smaller adsorbent (30 μm). Generally, polymer-grafted adsorbents improved the exclusion of the virus-like particles. Overall, the middle branch-chain length polymer grafted on larger adsorbent showed optimal performance at 92% flow-through recovery with a purification factor of 1.53. A comparative study between the adsorbent with dextran grafts and the polymer-grafted adsorbent showed that a better exclusion of virus-like particles was achieved with the absorbent grafted with inert polymer. The grafted polymer was also shown to reduce strong interaction between binding sites and virus-like particles, which preserved the particles' structure.
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Affiliation(s)
- Hon Wei Ng
- Chemical Engineering Discipline, School of Engineering, Monash University Malaysia, Selangor, Malaysia
| | - Micky Fu Xiang Lee
- Chemical Engineering Discipline, School of Engineering, Monash University Malaysia, Selangor, Malaysia
| | - Gek Kee Chua
- Faculty of Chemical and Natural Resources Engineering, Universiti Malaysia Pahang, Pahang, Malaysia
| | - Bee Koon Gan
- Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Selangor, Malaysia.,Institute of Bioscience, Universiti Putra Malaysia, Selangor, Malaysia
| | - Wen Siang Tan
- Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Selangor, Malaysia.,Institute of Bioscience, Universiti Putra Malaysia, Selangor, Malaysia
| | - Chien Wei Ooi
- Chemical Engineering Discipline, School of Engineering, Monash University Malaysia, Selangor, Malaysia
| | - Siah Ying Tang
- Chemical Engineering Discipline, School of Engineering, Monash University Malaysia, Selangor, Malaysia
| | - Eng Seng Chan
- Chemical Engineering Discipline, School of Engineering, Monash University Malaysia, Selangor, Malaysia.,Advanced Engineering Platform, Monash University Malaysia, Selangor, Malaysia
| | - Beng Ti Tey
- Chemical Engineering Discipline, School of Engineering, Monash University Malaysia, Selangor, Malaysia.,Advanced Engineering Platform, Monash University Malaysia, Selangor, Malaysia
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A fast and efficient purification platform for cell-based influenza viruses by flow-through chromatography. Vaccine 2017; 36:3146-3152. [PMID: 28342667 DOI: 10.1016/j.vaccine.2017.03.016] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2016] [Revised: 03/03/2017] [Accepted: 03/08/2017] [Indexed: 01/01/2023]
Abstract
Since newly emerging influenza viruses with pandemic potentials occurred in recent years, the demand for producing pandemic influenza vaccines for human use is high. For the development of a quick and efficient vaccine production, we proposed an efficient purification platform from the harvest to the purified bulk for the cell-based influenza vaccine production. This platform based on flow-through chromatography and filtration steps and the process only involves a few purification steps, including depth filtration, inactivation by formaldehyde, microfiltration, ultrafiltration, anion-exchange and ligand-core chromatography and sterile filtration. In addition, in the proposed chromatography steps, no virus capture steps were employed, and the purification results were not affected by the virus strain variation, host cells and culturing systems. The results from different virus strains which produced by Vero or MDCK cells in different culturing systems also obtained 33-46% HA recovery yields by this platform. The overall removal rates of the protein and DNA concentration in the purified bulk were over 96.1% and 99.7%, respectively. The low residual cellular DNA concentrations were obtained ranged from 30 to 130pg per human dose (15µg/dose). All influenza H5N1 purified bulks met the regulatory requirements for human vaccine use.
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Lee MFX, Chan ES, Tam KC, Tey BT. Thermo-responsive adsorbent for size-selective protein adsorption. J Chromatogr A 2015; 1394:71-80. [DOI: 10.1016/j.chroma.2015.03.034] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Revised: 02/25/2015] [Accepted: 03/16/2015] [Indexed: 12/18/2022]
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12
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Fernandes CSM, Gonçalves B, Sousa M, Martins DL, Barroso T, Pina AS, Peixoto C, Aguiar-Ricardo A, Roque ACA. Biobased monoliths for adenovirus purification. ACS APPLIED MATERIALS & INTERFACES 2015; 7:6605-6612. [PMID: 25756920 DOI: 10.1021/am508907b] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Adenoviruses are important platforms for vaccine development and vectors for gene therapy, increasing the demand for high titers of purified viral preparations. Monoliths are macroporous supports regarded as ideal for the purification of macromolecular complexes, including viral particles. Although common monoliths are based on synthetic polymers as methacrylates, we explored the potential of biopolymers processed by clean technologies to produce monoliths for adenovirus purification. Such an approach enables the development of disposable and biodegradable matrices for bioprocessing. A total of 20 monoliths were produced from different biopolymers (chitosan, agarose, and dextran), employing two distinct temperatures during the freezing process (-20 °C and -80 °C). The morphological and physical properties of the structures were thoroughly characterized. The monoliths presenting higher robustness and permeability rates were further analyzed for the nonspecific binding of Adenovirus serotype 5 (Ad5) preparations. The matrices presenting lower nonspecific Ad5 binding were further functionalized with quaternary amine anion-exchange ligand glycidyltrimethylammonium chloride hydrochloride by two distinct methods, and their performance toward Ad5 purification was assessed. The monolith composed of chitosan and poly(vinyl) alcohol (50:50) prepared at -80 °C allowed 100% recovery of Ad5 particles bound to the support. This is the first report of the successful purification of adenovirus using monoliths obtained from biopolymers processed by clean technologies.
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Affiliation(s)
- Cláudia S M Fernandes
- †UCIBIO, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - Bianca Gonçalves
- †UCIBIO, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - Margarida Sousa
- †UCIBIO, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
- §LAQV, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - Duarte L Martins
- ‡Instituto de Biologia Experimental Tecnológica, Avenida da República, Quinta do Marquês, Edificio IBET/ITQB, Estação Agronómica Nacional, 2780-157 Oeiras, Portugal
| | - Telma Barroso
- †UCIBIO, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
- §LAQV, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - Ana Sofia Pina
- †UCIBIO, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - Cristina Peixoto
- ‡Instituto de Biologia Experimental Tecnológica, Avenida da República, Quinta do Marquês, Edificio IBET/ITQB, Estação Agronómica Nacional, 2780-157 Oeiras, Portugal
| | - Ana Aguiar-Ricardo
- §LAQV, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - A Cecília A Roque
- †UCIBIO, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
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Pérez-Martínez Y, Montesinos-Cisneros RM, Guerrero-Germán P, Guzman-Zamudio R, Tejeda-Mansir A. Batch Equilibrium and Kinetic Studies of Plasmid pCI Adsorption onto Perfusion Particles. J LIQ CHROMATOGR R T 2014. [DOI: 10.1080/10826076.2014.896818] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Y. Pérez-Martínez
- a Departamento de Ingeniería Química y Metalurgia , Universidad de Sonora , Hermosillo , Sonora , México
| | | | - P. Guerrero-Germán
- a Departamento de Ingeniería Química y Metalurgia , Universidad de Sonora , Hermosillo , Sonora , México
| | - R. Guzman-Zamudio
- c Department of Chemical and Environmental Engineering , University of Arizona , Tucson , Arizona , USA
| | - A. Tejeda-Mansir
- d Departamento de Investigaciones Científicas y Tecnológicas , Universidad de Sonora , Hermosillo , Sonora , México
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15
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Sousa Â, Sousa F, Queiroz JA. Advances in chromatographic supports for pharmaceutical-grade plasmid DNA purification. J Sep Sci 2012; 35:3046-58. [DOI: 10.1002/jssc.201200307] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2012] [Revised: 05/28/2012] [Accepted: 06/02/2012] [Indexed: 01/04/2023]
Affiliation(s)
- Ângela Sousa
- CICS-UBI - Centro de Investigação em Ciências da Saúde; Universidade da Beira Interior; Covilhã Portugal
| | - Fani Sousa
- CICS-UBI - Centro de Investigação em Ciências da Saúde; Universidade da Beira Interior; Covilhã Portugal
| | - João A. Queiroz
- CICS-UBI - Centro de Investigação em Ciências da Saúde; Universidade da Beira Interior; Covilhã Portugal
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16
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Ongkudon CM, Chew JH, Liu B, Danquah MK. Chromatographic Removal of Endotoxins: A Bioprocess Engineer's Perspective. ACTA ACUST UNITED AC 2012. [DOI: 10.5402/2012/649746] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Gram-negative bacteria are widely used for the production of gene-based products such as DNA vaccines and bio-drugs, where endotoxin contamination can occur at any point within the process and its removal is of great concern. In this article, we review the structures of endotoxin and the effects that it causes in vivo. The endotoxin removal strategies are also discussed in the light of the different interaction mechanisms involved between endotoxins and bioproducts particularly plasmid DNA and proteins. For most cases, endotoxin removal is favoured at a highly ionic or acidic condition. Various removal methods particularly chromatography-based techniques are covered in this article according to the relevant applications.
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Affiliation(s)
- Clarence M. Ongkudon
- Bio Engineering Laboratory, Department of Chemical Engineering, Monash University, Wellington Road, Clayton, VIC 3800, Australia
- Biotechnology Research Institute, University Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia
| | - Jia Han Chew
- Bio Engineering Laboratory, Department of Chemical Engineering, Monash University, Wellington Road, Clayton, VIC 3800, Australia
| | - Boyin Liu
- Bio Engineering Laboratory, Department of Chemical Engineering, Monash University, Wellington Road, Clayton, VIC 3800, Australia
| | - Michael K. Danquah
- Bio Engineering Laboratory, Department of Chemical Engineering, Monash University, Wellington Road, Clayton, VIC 3800, Australia
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Adsorption of peptides and small proteins with control access polymer permeation to affinity binding sites. Part II: Polymer permeation-ion exchange separation adsorbents with polyethylene glycol and strong anion exchange groups. J Chromatogr A 2012; 1227:126-37. [DOI: 10.1016/j.chroma.2011.12.092] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2011] [Revised: 12/09/2011] [Accepted: 12/27/2011] [Indexed: 11/21/2022]
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Iyer G, Ramaswamy S, Asher D, Mehta U, Leahy A, Chung F, Cheng KS. Reduced surface area chromatography for flow-through purification of viruses and virus like particles. J Chromatogr A 2011; 1218:3973-81. [DOI: 10.1016/j.chroma.2011.04.086] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2011] [Revised: 04/26/2011] [Accepted: 04/28/2011] [Indexed: 11/26/2022]
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19
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Guerrero-Germán P, Montesinos-Cisneros RM, Guzmán R, Tejeda-Mansir A. Modelling and simulation of plasmid DNA adsorption on ion-exchange membrane columns. CAN J CHEM ENG 2010. [DOI: 10.1002/cjce.20438] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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20
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Arpanaei A, Winther-Jensen B, Theodosiou E, Kingshott P, Hobley TJ, Thomas ORT. Surface modification of chromatography adsorbents by low temperature low pressure plasma. J Chromatogr A 2010; 1217:6905-16. [PMID: 20869062 DOI: 10.1016/j.chroma.2010.08.069] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2010] [Revised: 08/18/2010] [Accepted: 08/24/2010] [Indexed: 11/26/2022]
Abstract
In this study we show how low temperature glow discharge plasma can be used to prepare bi-layered chromatography adsorbents with non-adsorptive exteriors. The commercial strong anion exchange expanded bed chromatography matrix, Q HyperZ, was treated with plasmas in one of two general ways. Using a purpose-designed rotating reactor, plasmas were employed to either: (i) remove anion exchange ligands at or close to the exterior surface of Q HyperZ, and replace them with polar oxygen containing functions ('plasma etching and oxidation'); or (ii) bury the same surface exposed ligands beneath thin polymer coatings ('plasma polymerization coating') using appropriate monomers (vinyl acetate, vinyl pyrrolidone, safrole) and argon as the carrier gas. X-ray photoelectron spectroscopy analysis (first ∼10 nm depth) of Q HyperZ before and after the various plasma treatments confirmed that substantial changes to the elemental composition of Q HyperZ's exterior had been inflicted in all cases. The atomic percent changes in carbon, nitrogen, oxygen, yttrium and zirconium observed after being exposed to air plasma etching were entirely consistent with: the removal of pendant Q (trimethylammonium) functions; increased exposure of the underlying yttrium-stabilised zirconia shell; and introduction of hydroxyl and carbonyl functions. Following plasma polymerization treatments (with all three monomers tested), the increased atomic percent levels of carbon and parallel drops in nitrogen, yttrium and zirconium provided clear evidence that thin polymer coats had been created at the exteriors of Q HyperZ adsorbent particles. No changes in adsorbent size and surface morphology, nor any evidence of plasma-induced damage could be discerned from scanning electron micrographs, light micrographs and measurements of particle size distributions following 3 h exposure to air (220 V; 35.8 W L(-1)) or 'vinyl acetate/argon' (170 V; 16.5 W L(-1)) plasmas. Losses in bulk chloride exchange capacity before and after exposure to plasmas enabled effective modification depths within hydrated Q HyperZ adsorbent particles to be calculated as 0.2-1.2 μm, depending on the conditions applied. The depth of plasma induced alteration was strongly influenced by the power input and size of the treated batch, i.e. dropping the power or increasing the batch size resulted in reduced plasma penetration and therefore shallower modification. The selectivity of 'surface vs. core' modification imparted to Q HyperZ by the various plasma treatments was evaluated in static and dynamic binding studies employing appropriate probes, i.e. plasmid DNA, sonicated calf thymus DNA and bovine serum albumin. In static binding studies performed with adsorbents that had been exposed to plasmas at the 5 g scale (25 g L(-1) of plasma reactor), the highest 'surface/core' modification selectivity was observed for Q HyperZ that had been subjected to 3 h of air plasma etching at 220 V (35.8 W L(-1)). This treatment removed ∼53% of 'surface' DNA binding at the expense of a 9.3% loss in 'core' protein binding. Even more impressive results were obtained in dynamic expanded bed adsorption studies conducted with Q HyperZ adsorbents that had been treated with air (220 V, 3 h) and 'vinyl acetate/argon' (170 V, 3 h) plasmas at 10.5 g scale (52.5 g L(-1) of plasma reactor). Following both plasma treatments: the 10% breakthrough capacities of the modified Q HyperZ adsorbents towards 'surface' binding DNA probes dropped very significantly (30-85%); the DNA induced inter-particle cross-linking and contraction of expanded beds observed during application of sonicated DNA on native Q HyperZ was completely eradicated; but the 'core' protein binding performance remained unchanged cf. that of the native Q HyperZ starting material.
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Affiliation(s)
- A Arpanaei
- Center for Microbial Biotechnology, Building 223, Institute for Systems Biology, Technical University of Denmark, DK-2800 Lyngby, Denmark
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21
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SUN G, SUN Y. PREPARATION OF A BIPOROUS POLYMERIC ADSORBENT FOR RAPID CHROMATOGRAPHIC PURIFICATION OF PLASMID DNA. ACTA POLYM SIN 2010. [DOI: 10.3724/sp.j.1105.2006.00994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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22
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Adsorption of pDNA on microparticulate charged surface. J Biotechnol 2009; 141:47-57. [DOI: 10.1016/j.jbiotec.2009.02.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2008] [Revised: 02/09/2009] [Accepted: 02/12/2009] [Indexed: 11/18/2022]
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23
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Sousa F, Passarinha L, Queiroz J. Biomedical application of plasmid DNA in gene therapy: A new challenge for chromatography. Biotechnol Genet Eng Rev 2009. [DOI: 10.5661/bger-26-83] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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24
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Tarmann C, Jungbauer A. Adsorption of plasmid DNA on anion exchange chromatography media. J Sep Sci 2008; 31:2605-18. [DOI: 10.1002/jssc.200700654] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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25
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Streitner N, Voss C, Flaschel E. Reverse micellar extraction systems for the purification of pharmaceutical grade plasmid DNA. J Biotechnol 2007; 131:188-96. [PMID: 17673324 DOI: 10.1016/j.jbiotec.2007.06.011] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2007] [Revised: 05/21/2007] [Accepted: 06/15/2007] [Indexed: 11/21/2022]
Abstract
Plasmid DNA as an active pharmaceutical ingredient (API) is gaining more and more importance. For the production of multigram quantities of this substance robust and scalable processes comprising several purification steps have to be designed. One main challenge is the initial separation of plasmid DNA and RNA in such a purification scheme. In this study we investigated the distribution of plasmid DNA and RNA in reverse micellar two-phase systems which is considered to be the basis for the development of an extractive purification step that can easily be integrated into common processes. For this purpose the distribution of the 4.6kb plasmid pUT649 and Escherichia coli RNA in systems comprising isooctane, ethylhexanol, and the surfactant methyltrioctylammoniumchloride (TOMAC) under the influence of different salts was studied. Anion concentrations at which the partitioning behaviour for nucleic acids inverted (inversion point) were identified. Systems capable of separating RNA from plasmid DNA were further analysed and applied to extract RNA from plasmid DNA out of a preconditioned cleared lysate. The capability of reverse micellar systems for plasmid form separation was also shown by capillary and agarose gel electrophoresis.
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Affiliation(s)
- Nadine Streitner
- Faculty of Technology, Bielefeld University, PO 100 131, D-33501 Bielefeld, Germany
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26
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Tiainen P, Gustavsson PE, Månsson MO, Larsson PO. Plasmid purification using non-porous anion-exchange silica fibres. J Chromatogr A 2007; 1149:158-68. [PMID: 17433342 DOI: 10.1016/j.chroma.2007.02.114] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2007] [Revised: 02/21/2007] [Accepted: 02/22/2007] [Indexed: 10/23/2022]
Abstract
A new type of fibre-based anion-exchange material for plasmid purification was developed. The basic material consisted of non-porous silica fibres with a mean diameter of 1.5 microm and a surface area of 2.4m(2)g(-1). The fibre surface was provided with several types of ligands, either by adsorption of polymers (chitosan or poly(ethyleneimine)) or by polymerization of amine-containing acrylic monomers onto a propyl methacrylate-silanized surface. The resulting polymer layers contained primary, tertiary or quaternary amines as ion-exchange groups. The packing density could be varied considerably, 9-34% (v/v). The loose packing structure provided excellent flow properties suitable for high-speed operations. The best overall performance was shown by silica fibres provided with tertiary amine polymers, having a plasmid-binding capacity of 0.9 mg ml(-1) (pre-purified plasmid) and a plasmid recovery of 62% (performance data remained stable though several adsorption cycles). The high flow rates possible with the fibre material made it especially useful when large volumes of cleared lysate were processed. The columns could be operated with retention of their adsorption properties at speeds of up to 1800 cm h(-1), equivalent to 0.5 column volumes per minute. The binding capacity was found to be lower than anticipated from the design of the fibres. Fluorescence imaging showing individual plasmid molecules indicated the fibre population to be heterogeneous with respect to plasmid adsorption, some fibres displaying poor binding properties. Possible reasons for this heterogeneity are discussed.
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Affiliation(s)
- Peter Tiainen
- Department of Pure and Applied Biochemistry, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
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27
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Sadílek P, Šatínský D, Solich P. Using restricted-access materials and column switching in high-performance liquid chromatography for direct analysis of biologically-active compounds in complex matrices. Trends Analyt Chem 2007. [DOI: 10.1016/j.trac.2007.02.002] [Citation(s) in RCA: 103] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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28
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Tiainen P, Gustavsson PE, Ljunglöf A, Larsson PO. Superporous agarose anion exchangers for plasmid isolation. J Chromatogr A 2007; 1138:84-94. [PMID: 17070823 DOI: 10.1016/j.chroma.2006.10.029] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2006] [Revised: 10/10/2006] [Accepted: 10/13/2006] [Indexed: 11/17/2022]
Abstract
Superporous agarose beads have wide, connecting flow pores allowing large molecules such as plasmids to be transported into the interior of the beads by convective flow. The pore walls provide additional surface for plasmid binding thus increasing the binding capacity of the adsorbent. Novel superporous agarose anion exchangers have been prepared, differing with respect to bead diameter, superpore diameter and type of anion-exchange functional group (poly(ethyleneimine) and quaternary amine). The plasmid binding capacities were obtained from breakthrough curves and compared with the binding capacity of homogeneous agarose beads of the same particle size. Significantly, the smaller diameter superporous agarose beads were found to have four to five times higher plasmid binding capacity than the corresponding homogeneous agarose beads. The experimentally determined plasmid binding capacity was compared with the theoretically calculated surface area for each adsorbent and fair agreement was found. Confocal microscopy studies of beads with adsorbed, fluorescently labelled plasmids aided in the interpretation of the results. Superporous poly(ethyleneimine)-substituted beads with a high ion capacity (230 micromol/ml) showed a plasmid binding of 3-4 mg/ml adsorbent. Superporous quaternary amine-substituted beads had a lower ion capacity (81 micromol/ml) and showed a correspondingly lower plasmid binding capacity (1-2 mg/ml adsorbent). In spite of the lower capacity, the beads with quaternary amine ligand were preferred, due to their much better plasmid recovery (70-100% recovery). Interestingly, both capacity and recovery was improved when the plasmid adsorption step was carried out in the presence of a moderate salt concentration. The most suitable superporous bead type (45-75 microm diameter beads; 4 microm superpores; quaternary amine ligand) was chosen for the capture of plasmid DNA from a clarified alkaline lysate. Two strategies were evaluated, one with and one without enzymatic digestion of RNA. The strategy without RNase gave high plasmid recovery, quantitative removal of protein and a 70% reduction in RNA.
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Affiliation(s)
- Peter Tiainen
- Department of Pure and Applied Biochemistry, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
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29
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Ma. Montesinos-Cisneros R, Olivas JDLV, Ortega J, Guzmán R, Tejeda-Mansir A. Breakthrough Performance of Plasmid DNA on Ion-Exchange Membrane Columns. Biotechnol Prog 2007. [DOI: 10.1002/bp070054d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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30
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Abstract
The concept of curing diseases at the genetic level was already introduced in the 1970s, but only the evolution of molecular biology and tools for genetic manipulation brought the idea into labs and clinics during the last 16 years. Viral and non-viral vectors and delivery systems were developed to transfer therapeutic genes into the target cells. In the case of non-viral approaches plasmid DNA has become a very promising gene delivery vector because it can easily be genetically manipulated and produced by cultivation of plasmid harbouring Escherichia coli and subsequent downstream processing, thus making production easy in comparison to other gene delivery vectors. Another advantage in using plasmid DNA is the low risk of immunogenic reactions and oncogen activation that can arise while using viral vectors. This review describes the recent development in plasmid manufacturing ranging from bacterial cultivation in batch and fedbatch mode to produce plasmid-bearing E. coli over cell lysis and subsequent purification to storage, application, and process and quality control.
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Affiliation(s)
- Carsten Voss
- Fermentation Engineering, Faculty of Technology, Bielefeld University, Germany.
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31
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Ma Montesinos-Cisneros R, Ortega J, Guzmán R, Tejeda-Mansir A. Breakthrough performance of linear-DNA on ion-exchange membrane columns. Bioprocess Biosyst Eng 2006; 29:91-8. [PMID: 16770595 DOI: 10.1007/s00449-006-0055-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2006] [Accepted: 02/17/2006] [Indexed: 10/24/2022]
Abstract
Breakthrough performance of linear-DNA adsorption on ion-exchange membrane columns was theoretically and experimentally investigated using batch and fixed-bed systems. System dispersion curves showed the absence of flow non-idealities in the experimental arrangement. Breakthrough curves were not significantly affected by flow-rate or inlet solution concentration. In the theoretical analysis a model was integrated by the serial coupling of the membrane transport model and the system dispersion model. A transport model that considers finite kinetic rate and column dispersed flow was used in the study. A simplex optimization routine coupled to the solution of the partial differential model equations was employed to estimate the maximum adsorption capacity constant, the equilibrium desorption constant and the forward interaction rate-constant, which are the parameters of the membrane transport model. Through this approach a good prediction of the adsorption phenomena is obtained for inlet concentrations and flow rates greater than 0.2 mg/ml and 0.16 ml/min.
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Affiliation(s)
- Rosa Ma Montesinos-Cisneros
- Departamento de Biotecnología y Bioingeniería, CINVESTAV-IPN, Avenida IPN No. 2508, Mexico, DF 07360, Mexico.
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32
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Hoare M, Levy MS, Bracewell DG, Doig SD, Kong S, Titchener‐Hooker N, Ward JM, Dunnill P. Bioprocess engineering issues that would be faced in producing a DNA vaccine at up to 100 m3 fermentation scale for an influenza pandemic. Biotechnol Prog 2006; 21:1577-92. [PMID: 16321039 PMCID: PMC7161863 DOI: 10.1021/bp050190n] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The risk of a pandemic with a virulent form of influenza is acknowledged by the World Health Organization (WHO) and other agencies. Current vaccine production facilities would be unable to meet the global requirement for vaccine. As a possible supplement a DNA vaccine may be appropriate, and bioprocess engineering factors bearing on the use of existing biopharmaceutical and antibiotics plants to produce it are described. This approach addresses the uncertainty of timing of a pandemic that precludes purpose-built facilities. The strengths and weaknesses of alternative downstream processing routes are analyzed, and several gaps in public domain information are addressed. The conclusion is that such processing would be challenging but feasible.
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Affiliation(s)
- Mike Hoare
- The Advanced Centre for Biochemical Engineering, Department of Biochemical Engineering, University College London, Torrington Place, London WC1E 7JE, UK
| | - M. Susana Levy
- The Advanced Centre for Biochemical Engineering, Department of Biochemical Engineering, University College London, Torrington Place, London WC1E 7JE, UK
| | - Daniel G. Bracewell
- The Advanced Centre for Biochemical Engineering, Department of Biochemical Engineering, University College London, Torrington Place, London WC1E 7JE, UK
| | - Steven D. Doig
- The Advanced Centre for Biochemical Engineering, Department of Biochemical Engineering, University College London, Torrington Place, London WC1E 7JE, UK
| | - Simyee Kong
- The Advanced Centre for Biochemical Engineering, Department of Biochemical Engineering, University College London, Torrington Place, London WC1E 7JE, UK
| | - Nigel Titchener‐Hooker
- The Advanced Centre for Biochemical Engineering, Department of Biochemical Engineering, University College London, Torrington Place, London WC1E 7JE, UK
| | - John M. Ward
- Department of Biochemistry and Molecular Biology, University College London, Torrington Place, London WC1E 7JE, UK
| | - Peter Dunnill
- The Advanced Centre for Biochemical Engineering, Department of Biochemical Engineering, University College London, Torrington Place, London WC1E 7JE, UK
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33
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Ferreira GNM. Chromatographic Approaches in the Purification of Plasmid DNA for Therapy and Vaccination. Chem Eng Technol 2005. [DOI: 10.1002/ceat.200500158] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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34
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Abstract
Liquid chromatography plays a central role in process-scale manufacturing of therapeutic plasmid DNA (pDNA) for gene therapy and DNA vaccination. Apart from its use as a preparative purification step, it is also very useful as an analytical tool to monitor and control pDNA quality during processing and in final formulations. This paper gives an overview of the use of pDNA chromatography. The specificity of pDNA purification and the consequent limitations to the performance of chromatography are described. Strategies currently used to overcome those limitations, as well as other possible solutions are presented. Applications of the different types of chromatography to the purification of therapeutic pDNA are reviewed, and the main advantages and disadvantages behind each technique highlighted.
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Affiliation(s)
- M M Diogo
- Centro de Engenharia Biológica e Química, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
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Kepka C, Lemmens R, Vasi J, Nyhammar T, Gustavsson PE. Integrated process for purification of plasmid DNA using aqueous two-phase systems combined with membrane filtration and lid bead chromatography. J Chromatogr A 2004; 1057:115-24. [PMID: 15584230 DOI: 10.1016/j.chroma.2004.09.060] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
An integrated process for purifying a 6.1 kilo base pair (kbp) plasmid from a clarified Escherichia coli cell lysate based on an ultra/diafiltration step combined with polymer/polymer aqueous two-phase system and a new type of chromatography is described. The process starts with a volume reduction (ultrafiltration) and buffer exchange (diafiltration) of the clarified lysate using a hollow fibre membrane system. The concentrated and desalted plasmid solution is then extracted in a thermoseparating aqueous two-phase system, where the contaminants (RNA and proteins) to a large extent are removed. While the buffer exchange (diafiltration) is necessary in order to extract the plasmid DNA exclusively to the top phase, experiments showed that the ultrafiltration step increased the productivity of the aqueous two-phase system by a factor of more than 10. The thermoseparated water phase was then subjected to a polishing step using lid bead chromatography. Lid beads are a new type of restricted access chromatography beads, here with a positively charged inner core that adsorbed the remaining RNA while its inert surface layer prevented adsorption of the plasmid DNA thus passing in the flow-through of the column. Differently-sized plasmid DNA in the range of 2.7-20.5 kbp were also partitioned in the aqueous two-phase system. Within this size range, all plasmid DNA was exclusively extracted to the top phase. The complete process is free of additives and easy scalable for use in large scale production of plasmid DNA. The overall process yield for plasmid DNA was 69%.
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Affiliation(s)
- Cecilia Kepka
- Department of Biochemistry, Center for Chemistry and Chemical Engineering, Lund University, SE-22100 Lund, Sweden
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