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Önal B, Odabaşı M. Design and application of a newly generated bio/synthetic cryogel column for DNA capturing. Polym Bull (Berl) 2020. [DOI: 10.1007/s00289-020-03387-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Önal B, Acet Ö, Sanz R, Sanz-Pérez ES, Erdönmez D, Odabaşı M. Co-evaluation of interaction parameters of genomic and plasmid DNA for a new chromatographic medium. Int J Biol Macromol 2019; 141:1183-1190. [DOI: 10.1016/j.ijbiomac.2019.09.068] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2019] [Revised: 08/26/2019] [Accepted: 09/09/2019] [Indexed: 12/20/2022]
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4
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Xenopoulos A, Pattnaik P. Production and purification of plasmid DNA vaccines: is there scope for further innovation? Expert Rev Vaccines 2014; 13:1537-51. [DOI: 10.1586/14760584.2014.968556] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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5
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Development of a phenyl membrane chromatography-based process yielding pharmaceutical grade plasmid deoxyribonucleic acid for mammalian cells transfection. J Chromatogr A 2014; 1337:67-74. [DOI: 10.1016/j.chroma.2014.02.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Revised: 01/23/2014] [Accepted: 02/08/2014] [Indexed: 01/24/2023]
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6
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Caramelo-Nunes C, Almeida P, Marcos J, Tomaz C. Aromatic ligands for plasmid deoxyribonucleic acid chromatographic analysis and purification: An overview. J Chromatogr A 2014; 1327:1-13. [DOI: 10.1016/j.chroma.2013.12.057] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Revised: 12/19/2013] [Accepted: 12/20/2013] [Indexed: 12/25/2022]
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7
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Soares A, Queiroz JA, Sousa F, Sousa A. Purification of human papillomavirus 16 E6/E7 plasmid deoxyribonucleic acid-based vaccine using an arginine modified monolithic support. J Chromatogr A 2013; 1320:72-9. [PMID: 24210303 DOI: 10.1016/j.chroma.2013.10.053] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2013] [Revised: 10/11/2013] [Accepted: 10/15/2013] [Indexed: 12/28/2022]
Abstract
The development of efficient plasmid DNA (pDNA) purification processes has fostered therapeutic applications like gene therapy and DNA vaccination. In fact, monolithic supports have emerged as interesting approaches to purify pDNA due to their excellent mass transfer properties and high binding capacity for large biomolecules. The present study describes a method that combines the high selectivity of arginine affinity ligands with the versatility of monoliths to efficiently purify the supercoiled (sc) plasmid HPV-16 E6/E7. Quality control tests indicated that the level of impurities (proteins, endotoxins, gDNA and RNA) in the final plasmid sample was in accordance with the guidelines proposed by regulatory agencies. Breakthrough experiments were designed to compare the dynamic binding capacity of pDNA in the conventional arginine-agarose matrix with the modified monolithic support. The arginine monolith capacity was substantially higher than the conventional arginine-agarose matrix at 10% of breakthrough under the flow rate and pDNA concentration used. Overall, given that the pDNA final product complies with regulatory specifications, this combined support can be the key to obtain an adequate non-viral vaccine against a HPV infection.
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Affiliation(s)
- A Soares
- CICS-UBI-Centro de Investigação em Ciências da Saúde, Universidade da Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal
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De La Vega J, Braak BT, Azzoni AR, Monteiro GA, Prazeres DMF. Impact of plasmid quality on lipoplex-mediated transfection. J Pharm Sci 2013; 102:3932-41. [PMID: 23996350 DOI: 10.1002/jps.23709] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Revised: 07/22/2013] [Accepted: 07/29/2013] [Indexed: 01/20/2023]
Abstract
This work investigates the impact of quality attributes (impurity content, plasmid charge, and compactness) of plasmid DNA isolated with different purification methodologies on the characteristics of lipoplexes prepared thereof (size, zeta potential, stability) and on their ability to transfect mammalian cells. A 3.7 kb plasmid with a green fluorescence protein (GFP) reporter gene, Lipofectamine®-based liposomes, and Chinese Hamster Ovary (CHO) cells were used as models. The plasmid was purified by hydrophobic interaction chromatography (HIC)/gel filtration, and with three commercial kits, which combine the use of chaotropic salts with silica membranes/glass fiber fleeces. The HIC-based protocol delivered a plasmid with the smallest hydrodynamic diameter (144 nm) and zeta potential (-46.5 mV), which is virtually free from impurities. When formulated with Lipofectamine®, this plasmid originated the smallest (146 nm), most charged (+13 mV), and most stable lipoplexes. In vitro transfection experiments further showed that these lipoplexes performed better in terms of plasmid uptake (∼500,000 vs. ∼100,000-200,000 copy number/cell), transfection efficiency (50% vs. 20%-40%), and GFP expression levels (twofold higher) when compared with lipoplexes prepared with plasmids isolated using commercial kits. Overall our observations highlight the potential impact that plasmid purification methodologies can have on the outcome of gene transfer experiments and trials.
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Affiliation(s)
- Jonathan De La Vega
- IBB-Institute for Biotechnology and Bioengineering, Centre for Biological and Chemical Engineering, Department of Bioengineering, Instituto Superior Técnico, Universidade Técnica de Lisboa, Lisboa, 1049-001, Portugal
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van der Heijden I, Gomez-Eerland R, van den Berg JH, Oosterhuis K, Schumacher TN, Haanen JBAG, Beijnen JH, Nuijen B. Transposon leads to contamination of clinical pDNA vaccine. Vaccine 2013; 31:3274-80. [PMID: 23707695 DOI: 10.1016/j.vaccine.2013.05.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Revised: 05/02/2013] [Accepted: 05/08/2013] [Indexed: 11/17/2022]
Abstract
We report an unexpected contamination during clinical manufacture of a Human Papilomavirus (HPV) 16 E6 encoding plasmid DNA (pDNA) vaccine, with a transposon originating from the Escherichia coli DH5 host cell genome. During processing, presence of this transposable element, insertion sequence 2 (IS2) in the plasmid vector was not noticed until quality control of the bulk pDNA vaccine when results of restriction digestion, sequencing, and CGE analysis were clearly indicative for the presence of a contaminant. Due to the very low level of contamination, only an insert-specific PCR method was capable of tracing back the presence of the transposon in the source pDNA and master cell bank (MCB). Based on the presence of an uncontrolled contamination with unknown clinical relevance, the product was rejected for clinical use. In order to prevent costly rejection of clinical material, both in-process controls and quality control methods must be sensitive enough to detect such a contamination as early as possible, i.e. preferably during plasmid DNA source generation, MCB production and ultimately during upstream processing. However, as we have shown that contamination early in the process development pipeline (source pDNA, MCB) can be present below limits of detection of generally applied analytical methods, the introduction of "engineered" or transposon-free host cells seems the only 100% effective solution to avoid contamination with movable elements and should be considered when searching for a suitable host cell-vector combination.
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Affiliation(s)
- I van der Heijden
- Department of Pharmacy & Pharmacology, Slotervaart Hospital/The Netherlands Cancer Institute, Amsterdam, The Netherlands.
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Madeira C, Rodrigues CAV, Reis MSC, Ferreira FFCG, Correia RESM, Diogo MM, Cabral JMS. Nonviral Gene Delivery to Neural Stem Cells with Minicircles by Microporation. Biomacromolecules 2013; 14:1379-87. [DOI: 10.1021/bm400015b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Catarina Madeira
- Department of Bioengineering and Institute for Biotechnology and Bioengineering (IBB), Instituto Superior Técnico, Technical University of Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal
| | - Carlos A. V. Rodrigues
- Department of Bioengineering and Institute for Biotechnology and Bioengineering (IBB), Instituto Superior Técnico, Technical University of Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal
| | - Mónica S. C. Reis
- Department of Bioengineering and Institute for Biotechnology and Bioengineering (IBB), Instituto Superior Técnico, Technical University of Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal
| | - Filipa F. C. G. Ferreira
- Department of Bioengineering and Institute for Biotechnology and Bioengineering (IBB), Instituto Superior Técnico, Technical University of Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal
| | - Raquel E. S. M. Correia
- Department of Bioengineering and Institute for Biotechnology and Bioengineering (IBB), Instituto Superior Técnico, Technical University of Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal
| | - Maria M. Diogo
- Department of Bioengineering and Institute for Biotechnology and Bioengineering (IBB), Instituto Superior Técnico, Technical University of Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal
| | - Joaquim M. S. Cabral
- Department of Bioengineering and Institute for Biotechnology and Bioengineering (IBB), Instituto Superior Técnico, Technical University of Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal
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Bonturi N, Radke VSCO, Bueno SMA, Freitas S, Azzoni AR, Miranda EA. Sodium citrate and potassium phosphate as alternative adsorption buffers in hydrophobic and aromatic thiophilic chromatographic purification of plasmid DNA from neutralized lysate. J Chromatogr B Analyt Technol Biomed Life Sci 2013; 919-920:67-74. [DOI: 10.1016/j.jchromb.2013.01.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2012] [Revised: 12/26/2012] [Accepted: 01/13/2013] [Indexed: 11/30/2022]
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12
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Üzek R, Uzun L, Şenel S, Denizli A. Nanospines incorporation into the structure of the hydrophobic cryogels via novel cryogelation method: An alternative sorbent for plasmid DNA purification. Colloids Surf B Biointerfaces 2013; 102:243-50. [DOI: 10.1016/j.colsurfb.2012.08.020] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2012] [Revised: 08/09/2012] [Accepted: 08/14/2012] [Indexed: 10/28/2022]
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Figueroa-Rosette JA, Guerrero-Germán P, Montesinos-Cisneros RM, Mártin-García AR, Tejeda-Mansir A. A Straightforward Method to Scale-Up Plasmid DNA Intermediate Recovery by Tangential Flow Ultrafiltration. BIOTECHNOL BIOTEC EQ 2013. [DOI: 10.5504/bbeq.2013.0053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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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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Raiado-Pereira L, Carapeto AP, Botelho do Rego AM, Mateus M. Grafting hydrophobic and affinity interaction ligands on membrane adsorbers: A close-up “view” by X-ray photoelectron spectroscopy. Sep Purif Technol 2012. [DOI: 10.1016/j.seppur.2012.03.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Abstract
Plasmid DNA (pDNA) is the base for promising DNA vaccines and gene therapies against many infectious, acquired, and genetic diseases, including HIV-AIDS, Ebola, Malaria, and different types of cancer, enteric pathogens, and influenza. Compared to conventional vaccines, DNA vaccines have many advantages such as high stability, not being infectious, focusing the immune response to only those antigens desired for immunization and long-term persistence of the vaccine protection. Especially in developing countries, where conventional effective vaccines are often unavailable or too expensive, there is a need for both new and improved vaccines. Therefore the demand of pDNA is expected to rise significantly in the near future. Since the injection of pDNA usually only leads to a weak immune response, several milligrams of DNA vaccine are necessary for immunization protection. Hence, there is a special interest to raise the product yield in order to reduce manufacturing costs. In this chapter, the different stages of plasmid DNA production are reviewed, from the vector design to downstream operation options. In particular, recent advances on cell engineering for improving plasmid DNA production are discussed.
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Affiliation(s)
- Alvaro R Lara
- Departamento de Procesos y Tecnología, Universidad Autónoma Metropolitana-Cuajimalpa, Mexico City, Mexico.
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ZEIN SIMAS, VETCHER ALEXANDREA, LEVENE STEPHEND. PCR-BASED SYNTHESIS OF REPETITIVE SINGLE-STRANDED DNA FOR APPLICATIONS TO NANOBIOTECHNOLOGY. INTERNATIONAL JOURNAL OF NANOSCIENCE 2011. [DOI: 10.1142/s0219581x05003140] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Recent data show that assembly of repetitive-sequence, single-stranded DNA molecules (ssDNA) and carbon nanotubes (CNTs) depend on the specific sequence repeat. Therefore, it is of practical interest to assess various methods for generating single-stranded DNA molecules that contain repetitive sequences. Existing automated synthesis procedures for generating long (> 100 nt) ssDNA molecules generate ssDNA products of variable purity and yield. An alternative to automated synthesis is the polymerase chain reaction (PCR), which provides a powerful tool for the amplification of minute amounts of specific DNA sequences. Here we show that a modified asymmetric PCR method allows synthesis of long ssDNAs comprised of tandem repeats of the repetitive vertebrate telomeric sequence (TTAGGG)n, and is also applicable to arbitrary (repetitive or nonrepetitive) DNA. Long, repetitive deoxynucleotides produced by automated synthesis are surprisingly heterogeneous with respect to both length and sequence. Benefits of the method described here are that long, repetitive ssDNA sequences are generated with high sequence fidelity and yield.
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Affiliation(s)
- SIMA S. ZEIN
- Department of Molecular and Cell Biology and Institute of Biomedical Sciences and Technology, University of Texas at Dallas, P. O. Box 830688 Richardson, TX 75083, USA
| | - ALEXANDRE A. VETCHER
- Department of Molecular and Cell Biology and Institute of Biomedical Sciences and Technology, University of Texas at Dallas, P. O. Box 830688 Richardson, TX 75083, USA
| | - STEPHEN D. LEVENE
- Department of Molecular and Cell Biology and Institute of Biomedical Sciences and Technology, University of Texas at Dallas, P. O. Box 830688 Richardson, TX 75083, USA
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Sousa A, Tomaz C, Sousa F, Queiroz J. Successful application of monolithic innovative technology using a carbonyldiimidazole disk to purify supercoiled plasmid DNA suitable for pharmaceutical applications. J Chromatogr A 2011; 1218:8333-43. [DOI: 10.1016/j.chroma.2011.09.033] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2011] [Revised: 09/12/2011] [Accepted: 09/14/2011] [Indexed: 02/03/2023]
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Impact of lysine-affinity chromatography on supercoiled plasmid DNA purification. J Chromatogr B Analyt Technol Biomed Life Sci 2011; 879:3507-15. [DOI: 10.1016/j.jchromb.2011.09.032] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2011] [Revised: 09/12/2011] [Accepted: 09/16/2011] [Indexed: 12/23/2022]
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Guerrero-Germán P, Montesinos-Cisneros RM, Prazeres DMF, Tejeda-Mansir A. Purification of plasmid DNA from Escherichia coli ferments using anion-exchange membrane and hydrophobic chromatography. Biotechnol Appl Biochem 2011; 58:68-74. [DOI: 10.1002/bab.12] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Li H, Bo H, Wang J, Shao H, Huang S. Separation of supercoiled from open circular forms of plasmid DNA, and biological activity detection. Cytotechnology 2010; 63:7-12. [PMID: 21120691 DOI: 10.1007/s10616-010-9322-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2010] [Accepted: 11/13/2010] [Indexed: 11/29/2022] Open
Abstract
To establish a cost-effective purification process for the large-scale production of plasmid DNA for gene therapy and DNA vaccination, a single anion-exchange chromatography (AEC) step was employed to purify supercoiled plasmid DNA (sc pDNA) from other isoforms and Escherichia coli impurities present in a clarified lysate. Two different size and conformation plasmids were used as model targets, and showed similar elution behavior in this chromatographic operation, in which sc pDNA was effectively separated from open circle plasmid DNA (oc pDNA) in a salt gradient. The process delivered high-purity pDNA of homogeneity of 95 ± 1.1% and almost undetectable levels of endotoxins, genomic DNA, RNA and protein, at a yield of 65 ± 8%. Furthermore, the transfection efficiency (29 ± 0.4%) was significantly higher than that (20 ± 0.1%) of a pDNA control. The present study confirms the possibility of using a single AEC step to purify sc pDNA from other isoforms and host contaminants present in a clarified E. coli lysate.
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Affiliation(s)
- Huangjin Li
- School of Life Science and Bio-Pharmaceutical, Guangdong Pharmaceutical University, 510006, Guangzhou, China
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Abstract
Cited are literary data related to the development of DNA vaccines against rabies virus. Research results regarding gene vaccination of different models of laboratory animals and different ways of vaccine introduction are presented. Possibility to potentiate immunogenicity of DNA vaccines using adjuvants and cytokines is considered. Ways of improving of polynucleotide vaccines are discussed.
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Pereira LR, Prazeres DMF, Mateus M. Hydrophobic interaction membrane chromatography for plasmid DNA purification: Design and optimization. J Sep Sci 2010; 33:1175-84. [DOI: 10.1002/jssc.200900844] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Han Y, You G, Pattenden LK, Forde GM. The harnessing of peptide–monolith constructs for single step plasmid DNA purification. Process Biochem 2010. [DOI: 10.1016/j.procbio.2009.09.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Smrekar F, Podgornik A, Ciringer M, Kontrec S, Raspor P, Štrancar A, Peterka M. Preparation of pharmaceutical-grade plasmid DNA using methacrylate monolithic columns. Vaccine 2010; 28:2039-45. [DOI: 10.1016/j.vaccine.2009.10.061] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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26
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Good Manufacturing Practices production and analysis of a DNA vaccine against dental caries. Acta Pharmacol Sin 2009; 30:1513-21. [PMID: 19890359 DOI: 10.1038/aps.2009.152] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
AIM To prepare a clinical-grade anti-caries DNA vaccine pGJA-P/VAX and explore its immune effect and protective efficacy against a cariogenic bacterial challenge. METHODS A large-scale industrial production process was developed under Good Manufacturing Practices (GMP) by combining and optimizing common unit operations such as alkaline lysis, precipitation, endotoxin removal and column chromatography. Quality controls of the purified bulk and final lyophilized vaccine were conducted according to authoritative guidelines. Mice and gnotobiotic rats were intranasally immunized with clinical-grade pGJA-P/VAX with chitosan. Antibody levels of serum IgG and salivary SIgA were assessed by an enzyme-linked immunosorbent assay (ELISA), and caries activity was evaluated by the Keyes method. pGJA-P/VAX and pVAX1 prepared by a laboratory-scale commercial kit were used as controls. RESULTS The production process proved to be scalable and reproducible. Impurities including host protein, residual RNA, genomic DNA and endotoxin in the purified plasmid were all under the limits of set specifications. Intranasal vaccination with clinical-grade pGJA-P/VAX induced higher serum IgG and salivary SIgA in both mice and gnotobiotic rats. While in the experimental caries model, the enamel (E), dentinal slight (Ds), and dentinal moderate (Dm) caries lesions were reduced by 21.1%, 33.0%, and 40.9%, respectively. CONCLUSION The production process under GMP was efficient in preparing clinical-grade pGJA-P/VAX with high purity and intended effectiveness, thus facilitating future clinical trials for the anti-caries DNA vaccine.
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Lemos MAN, Santos ASD, Astray RM, Pereira CA, Jorge SAC. Rabies virus glycoprotein expression in Drosophila S2 cells. I: design of expression/selection vectors, subpopulations selection and influence of sodium butyrate and culture medium on protein expression. J Biotechnol 2009; 143:103-10. [PMID: 19615415 DOI: 10.1016/j.jbiotec.2009.07.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2009] [Revised: 06/30/2009] [Accepted: 07/08/2009] [Indexed: 11/30/2022]
Abstract
The cDNA encoding the rabies virus glycoprotein (RVGP) gene was cloned in expression plasmids under the control of the inductive metallothionein promoter. They were designed in order to bear or not a secretion signal (i) and a cDNA coding for the selection hygromycin. These vectors were transfected into S2 cells, cell populations selected and subpopulations were then obtained by reselection with hygromycin. Cell cultures were examined for kinetics of cell growth, detection of RVGP mRNA and expression of RVGP. All cell populations were shown to express the RVGP mRNA upon induction. S2MtRVGPHy cell population, transfected with one vector that contains RGPV gene and selection gene, was shown to express higher amounts of RVGP as evaluated by flow cytometry ( approximately 52%) and ELISA (0.64 microg/10(7)cells at day 7). Subpopulation selection allowed a higher RVGP expression, specially for the S2MtRVGPHy(+) (5.5 microg/10(7)cells at day 7). NaBu treatment leading to lower cell growth and higher RVGP expression allowed an even higher RVGP synthesis by S2MtRVGPHy(+) (8.4 microg/10(7)cells at day 7). SF900II medium leading to a higher S2MtRVGPHy(+)cell growth allowed a higher final RVGP synthesis in this cell culture. RVGP synthesis may be optimized by the expression/selection vectors design, cell subpopulations selection, chromatin exposure and culture medium employed.
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28
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Henriques A, Madeira C, Fevereiro M, Prazeres D, Aires-Barros M, Monteiro G. Effect of cationic liposomes/DNA charge ratio on gene expression and antibody response of a candidate DNA vaccine against Maedi Visna virus. Int J Pharm 2009; 377:92-8. [DOI: 10.1016/j.ijpharm.2009.05.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2009] [Revised: 04/30/2009] [Accepted: 05/06/2009] [Indexed: 10/20/2022]
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29
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Plasmid purification by hydrophobic interaction chromatography using sodium citrate in the mobile phase. Sep Purif Technol 2009. [DOI: 10.1016/j.seppur.2008.04.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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30
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Han Y, Gras S, Forde GM. Binding properties of peptidic affinity ligands for plasmid DNA capture and detection. AIChE J 2009. [DOI: 10.1002/aic.11690] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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31
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Sousa F, Prazeres DMF, Queiroz JA. Improvement of transfection efficiency by using supercoiled plasmid DNA purified with arginine affinity chromatography. J Gene Med 2009; 11:79-88. [DOI: 10.1002/jgm.1272] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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32
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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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33
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Tesoro Cruz E, Feria Romero IA, López Mendoza JG, Orozco Suárez S, Hernández González R, Favela FB, Pérez Torres A, José Álvaro Aguilar Setién. Efficient post-exposure prophylaxis against rabies by applying a four-dose DNA vaccine intranasally. Vaccine 2008; 26:6936-44. [DOI: 10.1016/j.vaccine.2008.09.083] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2008] [Revised: 09/21/2008] [Accepted: 09/24/2008] [Indexed: 11/28/2022]
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Sousa F, Prazeres DM, Queiroz JA. Affinity chromatography approaches to overcome the challenges of purifying plasmid DNA. Trends Biotechnol 2008; 26:518-25. [DOI: 10.1016/j.tibtech.2008.05.005] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2008] [Revised: 05/21/2008] [Accepted: 05/28/2008] [Indexed: 02/05/2023]
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Danquah MK, Forde GM. Development of a pilot-scale bacterial fermentation for plasmid-based biopharmaceutical production using a stoichiometric medium. BIOTECHNOL BIOPROC E 2008. [DOI: 10.1007/s12257-007-0080-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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36
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Forde GM. Plasmid DNA purification via the use of a dual affinity protein. Methods Mol Biol 2008; 421:275-283. [PMID: 18826061 DOI: 10.1007/978-1-59745-582-4_18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Methods are presented for the production, affinity purification and analysis of plasmid DNA (pDNA). Batch fermentation is used for the production of the pDNA, and expanded bed chromatography, via the use of a dual affinity glutathione S-transferase (GST) fusion protein, is used for the capture and purification of the pDNA. The protein is composed of GST, which displays affinity for glutathione immobilized to a solid-phase adsorbent, fused to a zinc finger transcription factor, which displays affinity for a target 9-base pair sequence contained within the target pDNA. A Picogreen fluorescence assay and/or an ethidium bromide agarose gel electrophoresis assay can be used to analyze the eluted pDNA.
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Affiliation(s)
- Gareth M Forde
- Department of Chemical Engineering, Monash University, Clayton, Victoria, Australia
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Henriques AM, Fevereiro M, Prazeres DMF, Monteiro GA. Development of a candidate DNA vaccine against Maedi-Visna virus. Vet Immunol Immunopathol 2007; 119:222-32. [PMID: 17624445 DOI: 10.1016/j.vetimm.2007.05.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2007] [Revised: 05/18/2007] [Accepted: 05/29/2007] [Indexed: 10/23/2022]
Abstract
DNA vaccine candidates against Maedi-Visna virus (MVV) infection in ovines were developed as an alternative to conventional vaccines. Candidates were constructed by cloning genes encoding the MVV gag polyprotein and gag proteins p16 and p25 fused to a beta-galactosidase reporter in a plasmid backbone. Transfection of different ovine cells showed a higher protein expression with plasmid lacZp16, which was hence further optimised by (i) removing a putative inhibitory sequence via reduction of the AU-content in the p16 gene or by (ii) introducing a secretory signal (Sc) to promote antigen secretion and increase its presentation to APCs. Unexpectedly, plasmids constructed on the basis of the first strategy by mutagenesis of lacZp16 (lacZp16mut(24)), led to a reduction in the expression of the antigen/reporter fusion in cultured ovine cells. This indicates that the high AU content in MVV does not inhibit protein expression. However, mice primed with lacZp16mut(24) and boosted with MVV protein displayed higher humoral response when compared with control lacZp16. The addition of the Sc signal (Sc-p16) led to lower amounts of intracellular antigen/reporter fusion in transfected ovine cells, thus confirming secretion. These findings correlate with in vivo experiments, which showed that mice primed with Sc-p16 and boosted with MVV exhibited stronger antibody responses when compared with control mice primed with lacZp16 and boosted with MVV. Stronger humoral responses were recorded by immunising mice with (i) Sc-p16 and lacZp16mut(24) plasmids together or with (ii) one plasmid containing both the mutations and the Sc signal.
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MESH Headings
- Animals
- Antibodies, Viral/blood
- Antigens, Viral/genetics
- Antigens, Viral/metabolism
- Cells, Cultured
- Female
- Genes, Viral
- Mice
- Mice, Inbred BALB C
- Pneumonia, Progressive Interstitial, of Sheep/immunology
- Pneumonia, Progressive Interstitial, of Sheep/prevention & control
- Sheep/immunology
- Sheep/virology
- Time Factors
- Vaccines, DNA/immunology
- Viral Vaccines/immunology
- Visna-maedi virus/immunology
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Affiliation(s)
- Ana M Henriques
- Institute for Biotechnology and Bioengineering, Centre for Biological and Chemical Engineering, Lisboa, Portugal
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Yokomizo AY, Jorge SAC, Astray RM, Fernandes I, Ribeiro OG, Horton DSPQ, Tonso A, Tordo N, Pereira CA. Rabies virus glycoprotein expression in Drosophila S2 cells. I. Functional recombinant protein in stable co-transfected cell line. Biotechnol J 2007; 2:102-9. [PMID: 17225257 DOI: 10.1002/biot.200600211] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Recombinant rabies virus glycoprotein (rRVGP) was expressed in Drosophila melanogaster Schneider 2 (S2) cells. The cDNA encoding the entire RVGP gene was cloned in an expression plasmid under the control of the constitutive actin promoter (Ac), which was co-transfected into S2 cells together with a hygromycin selection plasmid. Selected S2 cell populations (S2AcRVGP) had a decreased ability to grow and consume substrates, when compared to the non-transfected cells (S2). They were shown, by PCR, to express the RVGP gene and mRNA and, by immunoblotting, to synthesize the rRVGP in its expected molecular mass of 65 kDa. ELISA kinetic studies showed the rRVGP expression in cell lysates and supernatants attaining concentrations of 300 microg/L. By flow cytometry analysis, about 30% of the cells in the co-transfected populations were shown to express the rRVGP. Cell populations selected by limiting dilution expressed higher rRVGP yields. Mice immunized with rRVGP were shown to synthesize antibodies against rabies virus and be protected against experimental infection with rabies virus. The data presented here show that S2 cells can be suitable hosts for the rRVGP expression, allowing its synthesis in a high degree of physical and biological integrity.
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Rozkov A, Larsson B, Gillström S, Björnestedt R, Schmidt SR. Large-scale production of endotoxin-free plasmids for transient expression in mammalian cell culture. Biotechnol Bioeng 2007; 99:557-66. [PMID: 17680665 DOI: 10.1002/bit.21603] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Transient expression of recombinant proteins in mammalian cell culture in a 100-L scale requires a large quantity of plasmid that is very labour intensive to achieve with shake flask cultures and commercially available plasmid purification kits. In this paper we describe a process for plasmid production in 100-mg scale. The fermentation is carried out in a 4-L fed-batch culture with a minimal medium. The detection of the end of batch and triggering the exponential (0.1 h(-1)) feed profile was unattended and controlled by Multi-fermenter Control System. A restricted specific growth rate in fed-batch culture increased the specific plasmid yield compared to batch cultures with minimal and rich media. This together with high biomass concentration (68-107 g L(-1) wet weight) achieves high volumetric yields of plasmid (95-277 mg L(-1) depending on the construct). The purification process consisted of alkaline lysis, lysate clarification and ultrafiltration, two-phase extraction with Triton X-114 for endotoxin removal, anion-exchange chromatography as a polishing step, ultrafiltration and sterile filtration. Both fermentation and purification processes were used without optimisation for production of four plasmids yielding from 39 to 163 mg of plasmids with endotoxin content of 2.5 EU mg(-1) or less.
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Affiliation(s)
- Aleksei Rozkov
- Global Protein Science & Supply, DECS, AstraZeneca R&D, Södertälje, S-15185 Sweden.
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Tumanova I, Boyer J, Ausar SF, Burzynski J, Rosencrance D, White J, Scheidel J, Parkinson R, Maguire H, Middaugh CR, Weiner D, Green AP. Analytical and biological characterization of supercoiled plasmids purified by various chromatographic techniques. DNA Cell Biol 2006; 24:819-31. [PMID: 16332179 DOI: 10.1089/dna.2005.24.819] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Supercoiled plasmids are an important component of gene-based delivery vehicles. A number of production methods for clinical applications have been developed, each resulting in very high-quality product with low levels of residual contaminants. There is, however, no consensus on the optimal methods to characterize plasmid quality, and further, to determine if these methods are predictive of either product stability or biological activity. We have produced two plasmids using four production purification methodologies based on PolyFlo and hydrophobic interaction chromatography (HIC), either alone or in tandem processes. In each case, the product was analyzed using standard molecular biological methods. We also performed a number of biophysical analyses such as dynamic light scattering (DLS), circular dichroism (CD), Fourier transform infrared spectroscopy (FTIR), and differential scanning calorimetry (DSC). Minimal differences were detected among the preparations based on the more standard molecular biological methods. Some small differences were detected, however, using biophysical techniques, particularly FTIR and DSC, which may reflect small variations in plasmid tertiary structure and thermal stability. Stability after heat exposure at 60 degrees C, exposure to fetal bovine serum and long-term storage at 4 degrees C varied between plasmids. One plasmid showed no difference in stability depending on the production process, but the other showed significant differences. Evaluation in vivo in models for gene immunization and gene therapy showed significant differences in the response depending on the method of purification. Preparations using a tandem process of PolyFlo used in two separation modes provided higher biological activity compared to a tandem HIC/PolyFlo process or either resin used alone in a single column process. These data indicate that the process by which supercoiled plasmids are made can influence plasmid stability and biological activity and emphasize the need for more rigorous methods to evaluate supercoiled plasmids as gene-delivery vehicles.
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Forde GM, Ghose S, Slater NKH, Hine AV, Darby RAJ, Hitchcock AG. LacO-LacI interaction in affinity adsorption of plasmid DNA. Biotechnol Bioeng 2006; 95:67-75. [PMID: 16646090 DOI: 10.1002/bit.20955] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Current approaches for purifying plasmids from bacterial production systems exploit the physiochemical properties of nucleic acids in non-specific capture systems. In this study, an affinity system for plasmid DNA (pDNA) purification has been developed utilizing the interaction between the lac operon (lacO) sequence contained in the pDNA and a 64mer synthetic peptide representing the DNA-binding domain of the lac repressor protein, LacI. Two plasmids were evaluated, the native pUC19 and pUC19 with dual lacO3/lacOs operators (pUC19(lacO3/lacOs)), where the lacOs operator is perfectly symmetrical. The DNA-protein affinity interaction was evaluated by surface plasmon resonance using a Biacore system. The affinity capture of DNA in a chromatography system was evaluated using LacI peptide that had been immobilized to Streamline adsorbent. The KD-values for double stranded DNA (dsDNA) fragments containing lacO1 and lacO3 and lacOS and lacO3 were 5.7 +/- 0.3 x 10(-11) M and 4.1 +/- 0.2 x 10(-11) M respectively, which compare favorably with literature reports of 5 x 10(-10)-1 x 10(-9) M for native lacO1 and 1-1.2 x 10(-10) M for lacO1 in a saline buffer. Densitometric analysis of the gel bands from the affinity chromatography run clearly showed a significant preference for capture of the supercoiled fraction from the feed pDNA sample. The results indicate the feasibility of the affinity approach for pDNA capture and purification using native protein-DNA interaction.
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Affiliation(s)
- Gareth M Forde
- Department of Chemical Engineering, Cambridge Unit for Bioscience Engineering (CUBE), Pembroke Street, University of Cambridge, Cambridge CB2 3RA, UK
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42
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Abstract
In responding to future influenza pandemics and other infectious agents, plasmid DNA overcomes many of the limitations of conventional vaccine production approaches.
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Affiliation(s)
- Gareth M Forde
- Victorian Endowment for Science, Knowledge, and Innovation (VESKI), Department of Chemical Engineering, Monash University, Clayton, Melbourne, Australia, 3800.
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43
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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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Rajcáni J, Mosko T, Rezuchová I. Current developments in viral DNA vaccines: shall they solve the unsolved? Rev Med Virol 2005; 15:303-25. [PMID: 15906276 DOI: 10.1002/rmv.467] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
This review describes the mechanisms of immune response following DNA vaccination. The efficacy of DNA vaccines in animal models is highlighted, especially in viral diseases against which no widely accepted vaccination is currently available. Emphasis is given to possible therapeutic vaccination in chronic infections due to persisting virus genomes, such as recurrent herpes (HSV-1 and HSV-2), pre-AIDS (HIV-1) and/or chronic hepatitis B (HBV). In these, the problem of introducing foreign viral DNA may not be of crucial importance, since the immunised subject is already a viral DNA (or provirus) carrier. The DNA-based immunisation strategies may overcome several problems of classical viral vaccines. Novel DNA vaccines could induce immunity against multiple viral epitopes including the conservative type common ones, which do not undergo antigenic drifts. Within the immunised host, they mimic the effect of live attenuated viral vaccines when continuously expressing the polypeptide in question. For this reason they directly stimulate the antigen-presenting cells, especially dendritic cells. The antigen encoded by plasmid elicits T helper cell activity (Th1 and Th2 type responses), primes the cytotoxic T cell memory and may induce a satisfactory humoral response. The efficacy of DNA vaccines can be improved by adding plasmids encoding immunomodulatory cytokines and/or their co-receptors.
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Affiliation(s)
- J Rajcáni
- Institute of Virology, Slovak Academy of Sciences, Dúbravská cesta 9, 845 05 Bratislava, Slovak Republic.
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45
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Trindade IP, Diogo MM, Prazeres DMF, Marcos JC. Purification of plasmid DNA vectors by aqueous two-phase extraction and hydrophobic interaction chromatography. J Chromatogr A 2005; 1082:176-84. [PMID: 16035359 DOI: 10.1016/j.chroma.2005.05.079] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The current study explores the possibility of using a polyethyleneglycol(PEG)-ammonium sulphate aqueous two-phase system (ATPS) as an early step in a process for the purification of a model 6.1 kbp plasmid DNA (pDNA) vector. Neutralised alkaline lysates were fed directly to ATPS. Conditions were selected to direct pDNA towards the salt-rich bottom phase, so that this stream could be subsequently processed by hydrophobic interaction chromatography (HIC). Screening of the best conditions for ATPS extraction was performed using three PEG molecular weights (300, 400 and 600) and varying the tie-line length, phase volume ratio and lysate load. For a 20% (w/w) lysate load, the best results were obtained with PEG 600 using the shortest tie-line (38.16%, w/w). By further manipulating the system composition along this tie-line in order to obtain a top/bottom phase volume ratio of 9.3 (35%, w/w PEG 600, 6%, w/w NH4)2 SO4), it was possible to recover 100% of pDNA in the bottom phase with a three-fold increase in concentration. Further increase in the lysate load up to 40% (w/w) with this system resulted in a eight-fold increase in pDNA concentration, but with a yield loss of 15%. The ATPS extraction was integrated with HIC and the overall process compared with a previously defined process that uses sequential precipitations with iso-propanol and ammonium sulphate prior to HIC. Although the final yield is lower in the ATPS-based process the purity grade of the final pDNA product is higher. This shows that it is possible to substitute the time-consuming two-step precipitation procedure by a simple ATPS extraction.
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Affiliation(s)
- Inês P Trindade
- Centro de Química--IBQF (Pólo de Braga), Universidade do Minho, Campus de Gualtar, 4700-320 Braga, Portugal
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Brennan FR, Dougan G. Non-clinical safety evaluation of novel vaccines and adjuvants: new products, new strategies. Vaccine 2005; 23:3210-22. [PMID: 15837222 DOI: 10.1016/j.vaccine.2004.11.072] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2004] [Accepted: 11/24/2004] [Indexed: 11/21/2022]
Abstract
Advances in molecular biology and biotechnology, coupled with an increased understanding of disease processes and mechanisms of protective immunity have facilitated the development of new rationally-designed vaccines utilising recombinant proteins, naked DNA, live vectors, genetically-modified toxins and whole dendritic and tumour cells for both prophylaxis and therapy of a wide range of indications. These new vaccine technologies coupled with novel adjuvants, delivery systems, formulations, dosing routes and regimes present many unique and difficult challenges in demonstrating product safety and efficacy to support clinical testing. This paper aims to review these novel vaccine and adjuvant technologies and to highlight the key safety issues potentially associated with them. Approaches taken to demonstrate vaccine safety by assessing systemic and local toxicity, biodistribution and persistence, immunogenicity and immunotoxicity, reproductive toxicology, safety pharmacology and genotoxicity within the current regulatory framework are presented.
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Affiliation(s)
- Frank R Brennan
- Huntingdon Life Sciences, Woolley Road, Alconbury, Huntingdon, Cambridgeshire PE28 4HS, UK.
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47
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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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Wahlund PO, Gustavsson PE, Izumrudov VA, Larsson PO, Galaev IY. Precipitation by polycation as capture step in purification of plasmid DNA from a clarified lysate. Biotechnol Bioeng 2005; 87:675-84. [PMID: 15352066 DOI: 10.1002/bit.20180] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The demand for highly purified plasmids in gene therapy and plasmid-based vaccines requires large-scale production of pharmaceutical-grade plasmid. Large-scale purification of plasmid DNA from bacterial cell culture normally includes one or several chromatographic steps. Prechromatographic steps include precipitation with solvents, salts, and polymers combined with enzymatic degradation of nucleic acids. No method alone has so far been able to selectively capture plasmid DNA directly from a clarified alkaline lysate. We present a method for selective precipitation of plasmid DNA from a clarified alkaline lysate using polycation poly(N, N'-dimethyldiallylammonium) chloride (PDMDAAC). The specific interaction between the polycation and the plasmid DNA resulted in the formation of a stoichiometric insoluble complex. Efficient removal of contaminants such as RNA, by far the major contaminant in a clarified lysate, and proteins as well as 20-fold plasmid concentration has been obtained with about 80% recovery. The method utilizes a inexpensive, commercially available polymer and thus provides a capture step suitable for large-scale production.
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Affiliation(s)
- P-O Wahlund
- Department of Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, S-221 00, Lund, Sweden
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Manthorpe M, Hobart P, Hermanson G, Ferrari M, Geall A, Goff B, Rolland A. Plasmid vaccines and therapeutics: from design to applications. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2005; 99:41-92. [PMID: 16568888 DOI: 10.1007/10_003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
In the late 1980s, Vical and collaborators discovered that the injection into tissues of unformulated plasmid encoding various proteins resulted in the uptake of the plasmid by cells and expression of the encoded proteins. After this discovery, a period of technological improvements in plasmid delivery and expression and in pharmaceutical and manufacturing development was quickly followed by a plethora of human clinical trials testing the ability of injected plasmid to provide therapeutic benefits. In this chapter, we summarize in detail the technologies used in the most recent company-sponsored clinical trials and discuss the potential for future improvements in plasmid design, manufacturing, delivery, formulation and administration. A generic path for the clinical development of plasmid-based products is outlined and then exemplified using a case study on the development of a plasmid vaccine from concept to clinical trial.
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Prather KJ, Sagar S, Murphy J, Chartrain M. Industrial scale production of plasmid DNA for vaccine and gene therapy: plasmid design, production, and purification. Enzyme Microb Technol 2003. [DOI: 10.1016/s0141-0229(03)00205-9] [Citation(s) in RCA: 139] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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