1
|
Eitzmann DR, Anderson JL. Facile Preconcentration of Cell-Free DNA in Human Plasma by Ion-Specific Poly Ionic Sorbents Featuring an Anion Exchange Mechanism. Anal Chem 2024; 96:11942-11950. [PMID: 38985898 DOI: 10.1021/acs.analchem.4c01683] [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: 07/12/2024]
Abstract
The expanding horizon of diagnostic and therapeutic applications involving nucleic acids (NA) requires novel tools for purification, including minimal sample preparation. In this work, thin-film microextraction devices featuring five poly ionic sorbents were examined as anion exchange extraction phases for the rapid purification of NAs. Each sorbent is composed of a nonionic cross-linker and a methacrylate monomer containing a core tetra-alkyl ammonium moiety with an alkyl, anionic, or cationic residue. Extraction devices were produced through the application of the prepolymer sorbent mixture onto a functionalized nitinol metal support followed by photoinduced free-radical polymerization. The miniaturized extraction devices (10 mm × 3.5 mm) were directly immersed into aqueous samples to isolate NAs via electrostatic interactions with the polycation. The ammonium methacrylate (AMA) monomer containing a propyl trimethylammonium group (AMA-C3N(CH3)3) exhibited the highest affinity for DNA, with 80 ± 10% of DNA being isolated. Recovery of DNA from the sorbents required the introduction of ions in an aqueous solution to exchange the anionic biopolymer from the polycationic moiety. An investigation of three anion species revealed that the AMA-C3N(CH3)3 sorbent showed the highest recoveries, with the perchlorate anion producing a preconcentration factor of 4.36 ± 0.86 while requiring only 250 mM NaClO4. A directly compatible quantitative polymerase chain reaction assay was developed to quantify the recovery of spiked DNA with lengths of 830, 204, and 98 base pairs in heat-treated human plasma. The AMA-C3N(CH3)3 sorbent was uninhibited by the complex human plasma matrix and enabled high preconcentration factors for the spiked DNA at a biologically relevant concentration of 10 pg/mL. While Qiagen's circulating cell-free DNA MinElute extraction kit enabled higher preconcentration of all analytes, the methodology described in this work requires fewer steps, less user intervention, and minimal equipment requirements to isolate DNA, making it more amenable for high-throughput and low resource applications.
Collapse
Affiliation(s)
- Derek R Eitzmann
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Jared L Anderson
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| |
Collapse
|
2
|
Ferreira PL, Marie H, Berger T, Edelmann B, Rammo O, Sousa F. Evaluation of novel chromatographic prototypes for supercoiled plasmid DNA polishing. Front Bioeng Biotechnol 2024; 11:1296444. [PMID: 38249801 PMCID: PMC10797707 DOI: 10.3389/fbioe.2023.1296444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 12/15/2023] [Indexed: 01/23/2024] Open
Abstract
Since the world first approved gene therapeutics, nucleic acid-based therapies have gained prominence. Several strategies for DNA-based therapy have been approved, and numerous clinical trials for plasmid DNA (pDNA)-based vaccines are currently in development. Due to the rising interest in pDNA for vaccination and gene therapy, plasmid manufacturing must become more effective. One of the most critical steps is downstream processing, involving isolation and purification procedures. To comply with the regulatory guidelines, pDNA must be available as a highly purified, homogeneous preparation of supercoiled pDNA (sc pDNA). This process undertakes several challenges, primarily due to the diversity of molecules derived from the producer organism. In this study, different resins were tested for the adsorption and selective polishing of sc pDNA. To identify optimal pDNA adsorption conditions, batch and column assays were performed with different resins while promoting electrostatic and hydrophobic interactions. The effect of ionic strength, pH, and contact time were evaluated and optimized. Additionally, static and dynamic binding capacities were determined for the selected resins. Analytical chromatography and agarose gel electrophoresis were used to assess the selectivity of the most promising resins toward sc pDNA isoform. Also, genomic DNA, endotoxins, and proteins were quantified to characterize the final sc pDNA quality. At the same time, the recovery and purity yields were evaluated by quantification of sc pDNA after the purification procedure. Overall, the results of the chromatographic assays using agmatine- and arginine-based resins have shown promising potential for sc pDNA polishing. Both resins demonstrated excellent binding capacity for pDNA, with agmatine outperforming arginine-based resin in terms of capacity. However, arginine-based resin exhibited a superior pDNA recovery yield, reaching a notable 52.2% recovery compared to 10.09% from agmatine. Furthermore, both resins exhibited high relative purity levels above 90% for the sc pDNA. The comprehensive characterization of the recovered sc pDNA also revealed a significant reduction in gDNA levels, reinforcing the potential of these prototypes for obtaining high-quality and pure sc pDNA. These findings highlight the promising applications of both resins in scalable pDNA purification processes for gene therapy and biopharmaceutical applications.
Collapse
Affiliation(s)
- Pedro L. Ferreira
- CICS-UBI—Health Sciences Research Centre, University of Beira Interior, Covilhã, Portugal
| | | | - Tim Berger
- Merck Life Science KGaA, Darmstadt, Germany
| | | | | | - Fani Sousa
- CICS-UBI—Health Sciences Research Centre, University of Beira Interior, Covilhã, Portugal
| |
Collapse
|
3
|
Kralj Š, Kodermac ŠM, Bergoč I, Kostelec T, Podgornik A, Štrancar A, Černigoj U. Effect of plasmid DNA isoforms on preparative anion exchange chromatography. Electrophoresis 2023; 44:1953-1966. [PMID: 37271857 DOI: 10.1002/elps.202300035] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 05/08/2023] [Accepted: 05/23/2023] [Indexed: 06/06/2023]
Abstract
Increased need for plasmid DNA (pDNA) with sizes above 10 kbp (large pDNA) in gene therapy and vaccination brings the need for its large-scale production with high purity. Chromatographic purification of large pDNA is often challenging due to low process yields and column clogging, especially using anion-exchanging columns. The goal of our investigation was to evaluate the mass balance and pDNA isoform composition at column outlet for plasmids of different sizes in combination with weak anion exchange (AEX) monolith columns of varying channel size (2, 3 and 6 µm channel size). We have proven that open circular pDNA (OC pDNA) isoform is an important driver of reduced chromatographic performance in AEX chromatography. The main reason for the behaviour is the entrapment of OC pDNA in chromatographic supports with smaller channel sizes. Entrapment of individual isoforms was characterised for porous beads and convective monolithic columns. Convective entrapment of OC pDNA isoform was confirmed on both types of stationary phases. Porous beads in addition showed a reduced recovery of supercoiled pDNA (on an 11.6 kbp plasmid) caused by diffusional entrapment within the porous structure. Use of convective AEX monoliths or membranes with channel diameter >3.5 µm has been shown to increase yields and prevent irreversible pressure build-up and column clogging during purification of plasmids at least up to 16 kbp in size.
Collapse
Affiliation(s)
- Špela Kralj
- Sartorius BIA Separations d.o.o., Ajdovščina, Slovenia
| | | | - Ines Bergoč
- Sartorius BIA Separations d.o.o., Ajdovščina, Slovenia
| | | | - Aleš Podgornik
- Department of Chemical Engineering and Technical Safety, Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
- COBIK, Ajdovščina, Slovenia
| | - Aleš Štrancar
- Sartorius BIA Separations d.o.o., Ajdovščina, Slovenia
| | - Urh Černigoj
- Sartorius BIA Separations d.o.o., Ajdovščina, Slovenia
| |
Collapse
|
4
|
Heinrich T, Toepfer S, Steinmetzer K, Ruettger M, Walz I, Kanitz L, Lemuth O, Hubold S, Fritsch F, Loncarevic-Barcena I, Klingner S, Bocker HT, Ermantraut E. DNA-Binding Magnetic Nanoreactor Beads for Digital PCR Analysis. Anal Chem 2023; 95:14175-14183. [PMID: 37646599 PMCID: PMC10534990 DOI: 10.1021/acs.analchem.3c01418] [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: 09/01/2023]
Abstract
Digital PCR (dPCR) is based on the separation of target amplification reactions into many compartments with randomly distributed template molecules. Here, we present a novel digital PCR format based on DNA binding magnetic nanoreactor beads (mNRBs). Our approach relies on the binding of all nucleic acids present in a sample to the mNRBs, which both provide a high-capacity binding matrix for capturing nucleic acids from a sample and define the space available for PCR amplification by the internal volume of their hydrogel core. Unlike conventional dPCR, this approach does not require a precise determination of the volume of the compartments used but only their number to calculate the number of amplified targets. We present a procedure in which genomic DNA is bound, the nanoreactors are loaded with PCR reagents in an aqueous medium, and amplification and detection are performed in the space provided by the nanoreactor suspended in fluorocarbon oil. mNRBs exhibit a high DNA binding capacity of 1.1 ng DNA/mNRB (95% CI 1.0-1.2) and fast binding kinetics with ka = 0.21 s-1 (95% CI 0.20-0.23). The dissociation constant KD was determined to be 0.0011 μg/μL (95% CI 0.0007-0.0015). A simple disposable chamber plate is used to accommodate the nanoreactor beads in a monolayer formation for rapid thermocycling and fluorescence detection. The performance of the new method was compared with conventional digital droplet PCR and found to be equivalent in terms of the precision and linearity of quantification. In addition, we demonstrated that mNRBs provide quantitative capture and loss-free analysis of nucleic acids contained in samples in different volumes.
Collapse
Affiliation(s)
| | | | | | | | - Ines Walz
- BLINK AG, Bruesseler Strasse 20, 07747 Jena, Germany
| | - Lea Kanitz
- BLINK AG, Bruesseler Strasse 20, 07747 Jena, Germany
| | - Oliver Lemuth
- BLINK AG, Bruesseler Strasse 20, 07747 Jena, Germany
| | | | | | | | | | | | | |
Collapse
|
5
|
Beck J, Biechele M, Repik C, Gruber P, Furtmüller PG, Hahn R. Desorption of plasmid DNA from anion exchangers: Salt concentration at elution is independent of plasmid size and load. J Sep Sci 2023; 46:e2200943. [PMID: 36807776 DOI: 10.1002/jssc.202200943] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 02/13/2023] [Accepted: 02/15/2023] [Indexed: 02/20/2023]
Abstract
Detailed studies on the sorption behavior of plasmids on anion exchangers are rare compared to proteins. In this study, we systematically compare the elution behavior of plasmid DNA on three common anion exchange resins using linear gradient and isocratic elution experiments. Two plasmids of different lengths, 8 and 20 kbp, were studied and their elution characteristics were compared to a green fluorescent protein. Using established methods for determining retention characteristics of biomolecules in ion exchange chromatography lead to remarkable results. In contrast to the green fluorescent protein, plasmid DNA consistently elutes at one characteristic salt concentration in linear gradient elution. This salt concentration was the same independent of plasmid size but differed slightly for different resins. The behavior is consistent also at preparative loadings of plasmid DNA. Thus, only a single linear gradient elution experiment is sufficient to design elution in a process scale capture step. At isocratic elution conditions, plasmid DNA elutes only above this characteristic concentration. Even at slightly lower concentrations most plasmids remain tightly bound. We hypothesize, that the desorption is accompanied by a conformational change leading to a reduced number of available negative charges for binding. This explanation is supported by structural analysis before and after elution.
Collapse
Affiliation(s)
- Jürgen Beck
- Department of Biotechnology, Institute of Bioprocess Science and Engineering, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Matthias Biechele
- Department of Biotechnology, Institute of Bioprocess Science and Engineering, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Christoph Repik
- Baxalta Innovations GmbH, A Part of Takeda Companies, Orth an der Donau, Austria
| | - Petra Gruber
- Baxalta Innovations GmbH, A Part of Takeda Companies, Orth an der Donau, Austria
| | - Paul G Furtmüller
- Department of Chemistry, Institute of Biochemistry, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Rainer Hahn
- Department of Biotechnology, Institute of Bioprocess Science and Engineering, University of Natural Resources and Life Sciences, Vienna, Austria
| |
Collapse
|
6
|
Jakob LA, Mesurado T, Jungbauer A, Lingg N. Increase in cysteine-mediated multimerization under attractive protein-protein interactions. Prep Biochem Biotechnol 2022; 53:891-905. [PMID: 36576211 DOI: 10.1080/10826068.2022.2158471] [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: 12/29/2022]
Abstract
The CASPON enzyme became an interesting enzyme for fusion protein processing because it generates an authentic N-terminus. However, the high cysteine content of the CASPON enzyme may induce aggregation via disulfide-bond formation, which can reduce enzymatic activity and be considered a critical quality attribute. Different multimerization states of the CASPON enzyme were isolated by preparative size exclusion chromatography and analyzed with respect to multimerization propensity and enzymatic activity. The impact of co-solutes on multimerization was studied in solution and in adsorbed state. Furthermore, protein-protein interactions in the presence of different co-solutes were measured by self-interaction chromatography and were then correlated to the multimerization propensity. The dimer was the most stable and active species with 50% higher enzymatic activity than the tetramer. Multimerization was mainly governed by a cysteine-mediated pathway, as indicated by DTT-induced reduction of most caspase multimers. In the presence of ammonium sulfate, attractive protein-protein interactions were consistent with those observed for higher multimerization when the cysteine-mediated pathway was followed. Multimerization was also observed under attractive conditions on a chromatographic stationary phase. These findings corroborate common rules to perform protein purification with low residence time to avoid disulfide bond formation and conformational change of the protein upon adsorption.
Collapse
Affiliation(s)
- Leo A Jakob
- Department of Biotechnology, Institute of Bioprocess Science and Engineering, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Tomás Mesurado
- Department of Biotechnology, Institute of Bioprocess Science and Engineering, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Alois Jungbauer
- Department of Biotechnology, Institute of Bioprocess Science and Engineering, University of Natural Resources and Life Sciences, Vienna, Austria
- Austrian Centre of Industrial Biotechnology, Vienna, Austria
| | - Nico Lingg
- Department of Biotechnology, Institute of Bioprocess Science and Engineering, University of Natural Resources and Life Sciences, Vienna, Austria
- Austrian Centre of Industrial Biotechnology, Vienna, Austria
| |
Collapse
|
7
|
Applications of Cryostructures in the Chromatographic Separation of Biomacromolecules. J Chromatogr A 2022; 1683:463546. [DOI: 10.1016/j.chroma.2022.463546] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 09/05/2022] [Accepted: 09/29/2022] [Indexed: 12/20/2022]
|
8
|
Frank K, Bernau C, Buyel J. Spherical nanoparticles can be used as non-penetrating tracers to determine the extra-particle void volume in packed-bed chromatography columns. J Chromatogr A 2022; 1675:463174. [DOI: 10.1016/j.chroma.2022.463174] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 05/20/2022] [Accepted: 05/21/2022] [Indexed: 11/24/2022]
|
9
|
Cardoso S, Sousa F, Pessoa Filho PA, R Azzoni A. Understanding the adsorption of plasmid DNA and RNA molecules onto arginine-agarose chromatographic resin. Mol Biol Rep 2022; 49:3893-3901. [PMID: 35178684 PMCID: PMC8853897 DOI: 10.1007/s11033-022-07239-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Accepted: 02/08/2022] [Indexed: 11/29/2022]
Abstract
Background The production of nucleic acids (plasmid DNA or mRNA) in response to the development of new advanced vaccine platforms has greatly increased recently, mostly resulting from the pandemic situation. Due to the intended pharmaceutical use, nucleic acids preparations must fulfill all the required specifications in terms of purity and quality. Chromatography is a standard operation used to isolate these molecules from impurities, playing a central role in the manufacturing processes. However, the mechanism of nucleic acid adsorption in chromatographic resins is poorly understood, often leading to low adsorption capacities and a lack of specificity. Methods and results Here we investigated the adsorption of plasmid DNA and RNA molecules onto arginine-agarose, a resin with potential for large-scale application. Equilibrium batch studies were performed through pre-purified samples, using arginine-based ligands by varying the adsorption conditions in the pH value range from 6.0 to 9.0. Langmuir and Freundlich isotherm models were used to describe the adsorption equilibrium. The best fit for both nucleic acids was achieved using the Freundlich model. The correct choice of pH showed critical for controlling the efficacy of arginine-nucleic acid interaction, due to its influence on the nucleic acid structures. This type of analysis is necessary for the improvement of the selectivity and binding capacities of the resins used for plasmid DNA or mRNA purification. Conclusions The results presented here indicate that adsorption conditions can be tuned to enhance separation between pDNA and RNA, an important feature in the purification of nucleic acids for vaccine production.
Collapse
Affiliation(s)
- Sara Cardoso
- Departamento de Engenharia Química, Escola Politécnica da Universidade de São Paulo, Av. Prof. Luciano Gualberto, Trav. 3, Nº 380, São Paulo, SP, CEP 05508-900, Brazil
| | - Fani Sousa
- CICS-UBI - Centro de Investigação de Ciências da Saúde, Universidade da Beira Interior, Av. Infante D. Henrique, 6200-506, Covilhã, Portugal
| | - Pedro A Pessoa Filho
- Departamento de Engenharia Química, Escola Politécnica da Universidade de São Paulo, Av. Prof. Luciano Gualberto, Trav. 3, Nº 380, São Paulo, SP, CEP 05508-900, Brazil
| | - Adriano R Azzoni
- Departamento de Engenharia Química, Escola Politécnica da Universidade de São Paulo, Av. Prof. Luciano Gualberto, Trav. 3, Nº 380, São Paulo, SP, CEP 05508-900, Brazil.
| |
Collapse
|
10
|
Digital Twin of mRNA-Based SARS-COVID-19 Vaccine Manufacturing towards Autonomous Operation for Improvements in Speed, Scale, Robustness, Flexibility and Real-Time Release Testing. Processes (Basel) 2021. [DOI: 10.3390/pr9050748] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Supplying SARS-COVID-19 vaccines in quantities to meet global demand has a bottleneck in manufacturing capacity. Assessment of existing mRNA (messenger ribonucleic acid) vaccine processing shows the need for digital twins enabled by process analytical technology approaches to improve process transfers for manufacturing capacity multiplication, reduction of out-of-specification batch failures, qualified personnel training for faster validation and efficient operation, optimal utilization of scarce buffers and chemicals, and faster product release. A digital twin of the total pDNA (plasmid deoxyribonucleic acid) to mRNA process is proposed. In addition, a first feasibility of multisensory process analytical technology (PAT) is shown. Process performance characteristics are derived as results and evaluated regarding manufacturing technology bottlenecks. Potential improvements could be pointed out such as dilution reduction in lysis, and potential reduction of necessary chromatography steps. 1 g pDNA may lead to about 30 g mRNA. This shifts the bottleneck towards the mRNA processing step, which points out co-transcriptional capping as a preferred option to reduce the number of purification steps. Purity demands are fulfilled by a combination of mixed-mode and reversed-phase chromatography as established unit operations on a higher industrial readiness level than e.g., precipitation and ethanol-chloroform extraction. As a final step, lyophilization was chosen for stability, storage and transportation logistics. Alternative process units like UF/DF (ultra-/diafiltration) integration would allow the adjustment of final concentration and buffer composition before lipid-nano particle (LNP) formulation. The complete digital twin is proposed for further validation in manufacturing scale and utilization in process optimization and manufacturing operations. The first PAT results should be followed by detailed investigation of different batches and processing steps in order to implement this strategy for process control and reliable, efficient operation.
Collapse
|
11
|
Gerstweiler L, Billakanti J, Bi J, Middelberg A. Comparative evaluation of integrated purification pathways for bacterial modular polyomavirus major capsid protein VP1 to produce virus-like particles using high throughput process technologies. J Chromatogr A 2021; 1639:461924. [PMID: 33545579 PMCID: PMC7825977 DOI: 10.1016/j.chroma.2021.461924] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 01/11/2021] [Accepted: 01/16/2021] [Indexed: 12/21/2022]
Abstract
Modular virus-like particles and capsomeres are potential vaccine candidates that can induce strong immune responses. There are many described protocols for the purification of microbially-produced viral protein in the literature, however, they suffer from inherent limitations in efficiency, scalability and overall process costs. In this study, we investigated alternative purification pathways to identify and optimise a suitable purification pathway to overcome some of the current challenges. Among the methods, the optimised purification strategy consists of an anion exchange step in flow through mode followed by a multi modal cation exchange step in bind and elute mode. This approach allows an integrated process without any buffer adjustment between the purification steps. The major contaminants like host cell proteins, DNA and aggregates can be efficiently removed by the optimised strategy, without the need for a size exclusion polishing chromatography step, which otherwise could complicate the process scalability and increase overall cost. High throughput process technology studies were conducted to optimise binding and elution conditions for multi modal cation exchanger, Capto™ MMC and strong anion exchanger Capto™ Q. A dynamic binding capacity of 14 mg ml−1 was achieved for Capto™ MMC resin. Samples derived from each purification process were thoroughly characterized by RP-HPLC, SEC-HPLC, SDS-PAGE and LC-ESI-MS/MS Mass Spectrometry analytical methods. Modular polyomavirus major capsid protein could be purified within hours using the optimised process achieving purities above 87% and above 96% with inclusion of an initial precipitation step. Purified capsid protein could be easily assembled in-vitro into well-defined virus-like particles by lowering pH with addition of calcium chloride to the eluate. High throughout studies allowed the screening of a vast design space within weeks, rather than months, and unveiled complicated binding behaviour for CaptoTM MMC.
Collapse
Affiliation(s)
- Lukas Gerstweiler
- The University of Adelaide, School of Chemical Engineering and Advanced Materials, Adelaide, SA 5005, Australia
| | - Jagan Billakanti
- Cytiva, Product and Application Specialist Downstream Design-In ANZ, Suite 547, Level 5, 7 Eden Park Drive, Macquarie Park, NSW 2113, Australia
| | - Jingxiu Bi
- The University of Adelaide, School of Chemical Engineering and Advanced Materials, Adelaide, SA 5005, Australia
| | - Anton Middelberg
- The University of Adelaide, Division of Research and Innovation, Adelaide, SA 5005, Australia.
| |
Collapse
|
12
|
Valente JFA, Queiroz JA, Sousa F. Dilemma on plasmid DNA purification: binding capacity vs selectivity. J Chromatogr A 2020; 1637:461848. [PMID: 33421679 DOI: 10.1016/j.chroma.2020.461848] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 12/21/2020] [Accepted: 12/23/2020] [Indexed: 10/22/2022]
Abstract
Plasmid DNA chromatography is a powerful field in constant development and evolution. The use of this technique is considered mandatory in the production of an efficient and safe formulation to be applied for plasmid-mediated gene therapy. Concerning this, the search for an ideal chromatographic support/ligand combination motivated scientist to pursue a continuous improvement on the plasmid chromatography performance, looking for a progression on the ligands and supports used. The present review explores the different approaches used over time to purify plasmid DNA, ambitioning both high recovery and high purity levels. Overall, it is presented a critical discussion relying on the relevance of the binding capacity versus selectivity of the supports.
Collapse
Affiliation(s)
- J F A Valente
- CICS-UBI - Health Sciences Research Centre, Universidade da Beira Interior, Avenida Infante D. Henrique, 6200-506Covilhã, Portugal; CDRSP-IPLEIRIA - Centre for Rapid and Sustainable Product Development, Instituto Politécnico de Leiria, Rua de Portugal - Zona Industrial, 2430-028Marinha Grande, Portugal
| | - J A Queiroz
- CICS-UBI - Health Sciences Research Centre, Universidade da Beira Interior, Avenida Infante D. Henrique, 6200-506Covilhã, Portugal
| | - F Sousa
- CICS-UBI - Health Sciences Research Centre, Universidade da Beira Interior, Avenida Infante D. Henrique, 6200-506Covilhã, Portugal.
| |
Collapse
|
13
|
Retention and diffusion characteristics of oligonucleotides in a solid phase with polymer grafted anion-exchanger. J Chromatogr A 2020; 1629:461495. [PMID: 32846340 DOI: 10.1016/j.chroma.2020.461495] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 08/07/2020] [Accepted: 08/14/2020] [Indexed: 01/09/2023]
Abstract
In the chromatographic separation process of oligonucleotides (ONs), mechanistic understanding of their binding and diffusion processes is of significant importance to determine operating conditions in a fast and robust way. In this work, we determined the number of binding sites and the diffusivities of ONs in a polymer grafted anion exchange chromatography through linear gradient experiments (LGE) being carried out at selected four to five gradient slopes. Synthetic poly (T)s with length ranging from 3 to 90-mer were employed as a model of an antisense oligonucleotide with typical lengths of 10 - 30 bases. Comparison of the retention was also conducted between the grafted anion exchanger with a conventional ligand and an anion monolith disk. For the ONs up to 50 bases, the number of binding sites determined can be correlated with the length of ONs, and the grafted resin showed a better diffusion and narrower peak width compared to the nongrafted one. The retention behavior became similar for porous media when the longer ONs (> 50mer) were applied. The results obtained suggest that antisense ONs can be separated with grafted ligands without sacrificing mass transfer properties.
Collapse
|
14
|
Nweke MC, McCartney RG, Bracewell DG. Mechanical characterisation of agarose-based chromatography resins for biopharmaceutical manufacture. J Chromatogr A 2017; 1530:129-137. [DOI: 10.1016/j.chroma.2017.11.038] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 11/15/2017] [Accepted: 11/16/2017] [Indexed: 11/28/2022]
|
15
|
Zhao L, Zhu K, Huang Y, Li Q, Li X, Zhang R, Su Z, Wang Q, Ma G. Enhanced binding by dextran-grafting to Protein A affinity chromatographic media. J Sep Sci 2017; 40:1493-1499. [PMID: 28234424 DOI: 10.1002/jssc.201601196] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 12/28/2016] [Accepted: 01/25/2017] [Indexed: 12/24/2022]
Abstract
Dextran-grafted Protein A affinity chromatographic medium was prepared by grafting dextran to agarose-based matrix, followed by epoxy-activation and Protein A coupling site-directed to sulfhydryl groups of cysteine molecules. An enhancement of both the binding performance and the stability was achieved for this dextran-grafted Protein A chromatographic medium. Its dynamic binding capacity was 61 mg immunoglobulin G/mL suction-dried gel, increased by 24% compared with that of the non-grafted medium. The binding capacity of dextran-grafted medium decreased about 7% after 40 cleaning-in-place cycles, much lower than that of the non-grafted medium as decreased about 15%. Confocal laser scanning microscopy results showed that immunoglobulin G was bound to both the outside and the inside of dextran-grafted medium faster than that of non-grafted one. Atomic force microscopy showed that this dextran-grafted Protein A medium had much rougher surface with a vertical coordinate range of ±80 nm, while that of non-grafted one was ±10 nm. Grafted dextran provided a more stereo surface morphology and immunoglobulin G molecules were more easily to be bound. This high-performance dextran-grafted Protein A affinity chromatographic medium has promising applications in large-scale antibody purification.
Collapse
Affiliation(s)
- Lan Zhao
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, P.R. China
| | - Kai Zhu
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, P.R. China.,School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing, P.R. China
| | - Yongdong Huang
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, P.R. China
| | - Qiang Li
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, P.R. China
| | - Xiunan Li
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, P.R. China
| | - Rongyue Zhang
- Department of Chemical Engineering, Beijing Institute of Petro-chemical Technology, Beijing, P.R. China
| | - Zhiguo Su
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, P.R. China
| | - Qibao Wang
- School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing, P.R. China
| | - Guanghui Ma
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, P.R. China.,Jiangsu National Synergetic Innovation, Center for Advance Materials (SICAM), Nanjing, P.R. China
| |
Collapse
|
16
|
Diamantino T, Pereira P, Queiroz JA, Sousa Â, Sousa F. Minicircle DNA purification using a CIM® DEAE‐1 monolithic support. J Sep Sci 2016; 39:3544-9. [DOI: 10.1002/jssc.201600375] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 07/05/2016] [Accepted: 07/18/2016] [Indexed: 01/28/2023]
Affiliation(s)
- Tatiana Diamantino
- CICS‐UBI ‐ Health Sciences Research CentreUniversidade da Beira Interior Covilhã Portugal
| | - Patrícia Pereira
- CICS‐UBI ‐ Health Sciences Research CentreUniversidade da Beira Interior Covilhã Portugal
| | - João A. Queiroz
- CICS‐UBI ‐ Health Sciences Research CentreUniversidade da Beira Interior Covilhã Portugal
| | - Ângela Sousa
- CICS‐UBI ‐ Health Sciences Research CentreUniversidade da Beira Interior Covilhã Portugal
| | - Fani Sousa
- CICS‐UBI ‐ Health Sciences Research CentreUniversidade da Beira Interior Covilhã Portugal
| |
Collapse
|
17
|
Steppert P, Burgstaller D, Klausberger M, Berger E, Aguilar PP, Schneider TA, Kramberger P, Tover A, Nöbauer K, Razzazi-Fazeli E, Jungbauer A. Purification of HIV-1 gag virus-like particles and separation of other extracellular particles. J Chromatogr A 2016; 1455:93-101. [DOI: 10.1016/j.chroma.2016.05.053] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 05/04/2016] [Accepted: 05/13/2016] [Indexed: 12/31/2022]
|
18
|
Bicho D, Santos B, Caramelo-Nunes C, Sousa A, Sousa F, Queiroz J, Tomaz C. Application of ethylenediamine monolith to purify a hemagglutinin influenza deoxyribonucleic acid-based vaccine. Sep Purif Technol 2015. [DOI: 10.1016/j.seppur.2015.09.046] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
|
19
|
Byrnes SA, Bishop JD, Lafleur L, Buser JR, Lutz B, Yager P. One-step purification and concentration of DNA in porous membranes for point-of-care applications. LAB ON A CHIP 2015; 15:2647-59. [PMID: 25989457 DOI: 10.1039/c5lc00317b] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The emergence of rapid, user-friendly, point-of-care (POC) diagnostic systems is paving the way for better disease diagnosis and control. Lately, there has been a strong emphasis on developing molecular-based diagnostics due to their potential for greatly increased sensitivity and specificity. One of the most critical steps in developing practical diagnostic systems is the ability to perform sample preparation, especially the purification of nucleic acids (NA), at the POC. As such, we have developed a simple-to-use, inexpensive, and disposable sample preparation system for in-membrane purification and concentration of NAs. This system couples lateral flow in a porous membrane with chitosan, a linear polysaccharide that captures NAs via anion exchange chromatography. The system can also substantially concentrate the NAs. The combination of these capabilities can be used on a wide range of sample types, which are prepared for use in downstream processes, such as qPCR, without further purification.
Collapse
Affiliation(s)
- S A Byrnes
- University of Washington, Department of Bioengineering, 3720 15th Ave NE, Seattle, WA 98195, USA.
| | | | | | | | | | | |
Collapse
|
20
|
Aguilar P, Twarda A, Sousa F, Dias-Cabral A. Thermodynamic study of the interaction between linear plasmid deoxyribonucleic acid and an anion exchange support under linear and overloaded conditions. J Chromatogr A 2014; 1372C:166-173. [DOI: 10.1016/j.chroma.2014.11.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Revised: 10/30/2014] [Accepted: 11/02/2014] [Indexed: 12/24/2022]
|
21
|
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
| |
Collapse
|
22
|
Amirthalingam E, Rodrigues M, Casal-Dujat L, Calpena AC, Amabilino DB, Ramos-López D, Pérez-García L. Macrocyclic imidazolium-based amphiphiles for the synthesis of gold nanoparticles and delivery of anionic drugs. J Colloid Interface Sci 2014; 437:132-139. [PMID: 25313476 DOI: 10.1016/j.jcis.2014.09.026] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Revised: 09/10/2014] [Accepted: 09/11/2014] [Indexed: 12/11/2022]
Abstract
In the present work, we have explored the use of amphiphilic bis-imidazolium based macrocycles and an open chain analog for the successful synthesis of gold nanoparticles (AuNPs). The macrocyclic ligands incorporate hydrophobic chains of different lengths, and the newly synthesized ligands were further used for the synthesis of AuNPs in a biphasic system. The successfully synthesized AuNPs were thoroughly characterized. The sizes of the AuNPs were ca. 8 nm, using macrocyclic ligands bearing two 10 carbon atoms alkyl chains, ca. 5 nm in the case of macrocyclic ligands with two 18 carbon atoms alkyl chains, and ca. 7 nm for the open chain ligand with two 18 carbon atoms alkyl chains. Their possible application as vehicles to load and release anionic drugs (such as sodium ibuprofenate) was also assessed and compared with previously described open chain analogs. In this case, it was observed that the AuNPs had high efficiency in extracting sodium ibuprofenate from an aqueous solution. The application as a drug delivery vehicle was confirmed by in vitro release experiments at different pH values.
Collapse
Affiliation(s)
- Ezhil Amirthalingam
- Departament de Farmacologia i Química Terapèutica, Universitat de Barcelona, Avda. Joan XXIII s/n, 08028 Barcelona, Spain; Institut de Nanociència i Nanotecnología UB (IN2UB), Universitat de Barcelona, 08028 Barcelona, Spain
| | - Mafalda Rodrigues
- Departament de Farmacologia i Química Terapèutica, Universitat de Barcelona, Avda. Joan XXIII s/n, 08028 Barcelona, Spain; Institut de Nanociència i Nanotecnología UB (IN2UB), Universitat de Barcelona, 08028 Barcelona, Spain
| | - Lucía Casal-Dujat
- Departament de Farmacologia i Química Terapèutica, Universitat de Barcelona, Avda. Joan XXIII s/n, 08028 Barcelona, Spain; Institut de Nanociència i Nanotecnología UB (IN2UB), Universitat de Barcelona, 08028 Barcelona, Spain
| | - Ana C Calpena
- Institut de Nanociència i Nanotecnología UB (IN2UB), Universitat de Barcelona, 08028 Barcelona, Spain; Departament de Farmàcia i Tecnologia Farmacèutica, Universitat de Barcelona, Avda. Joan XXIII s/n, 08028 Barcelona, Spain
| | - David B Amabilino
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus Universitari, 08193 Bellaterra, Spain
| | - David Ramos-López
- Unitat de Toxicologia Experimental i Ecotoxicologia (UTOX-PCB), Parc Científic de Barcelona, Baldiri i Reixac 10-12, 08028 Barcelona, Spain
| | - Lluïsa Pérez-García
- Departament de Farmacologia i Química Terapèutica, Universitat de Barcelona, Avda. Joan XXIII s/n, 08028 Barcelona, Spain; Institut de Nanociència i Nanotecnología UB (IN2UB), Universitat de Barcelona, 08028 Barcelona, Spain.
| |
Collapse
|
23
|
Bicho D, Sousa Â, Sousa F, Queiroz J, Tomaz C. Effect of chromatographic conditions and plasmid DNA size on the dynamic binding capacity of a monolithic support. J Sep Sci 2014; 37:2284-92. [DOI: 10.1002/jssc.201400127] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Revised: 05/24/2014] [Accepted: 06/02/2014] [Indexed: 12/12/2022]
Affiliation(s)
- Diana Bicho
- CICS-UBI-Health Sciences Research Centre; University of Beira Interior, Av. Infante D. Henrique; Covilhã Portugal
| | - Ângela Sousa
- CICS-UBI-Health Sciences Research Centre; University of Beira Interior, Av. Infante D. Henrique; Covilhã Portugal
| | - Fani Sousa
- Department of Chemistry; University of Beira Interior; Covilhã Portugal
| | - João Queiroz
- CICS-UBI-Health Sciences Research Centre; University of Beira Interior, Av. Infante D. Henrique; Covilhã Portugal
- Department of Chemistry; University of Beira Interior; Covilhã Portugal
| | - Cãndida Tomaz
- CICS-UBI-Health Sciences Research Centre; University of Beira Interior, Av. Infante D. Henrique; Covilhã Portugal
- Department of Chemistry; University of Beira Interior; Covilhã Portugal
| |
Collapse
|
24
|
Matos T, Queiroz JA, Bülow L. Plasmid DNA purification using a multimodal chromatography resin. J Mol Recognit 2014; 27:184-9. [DOI: 10.1002/jmr.2349] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Revised: 11/25/2013] [Accepted: 12/02/2013] [Indexed: 11/09/2022]
Affiliation(s)
- Tiago Matos
- Department of Pure and Applied Biochemistry; Lund University; SE 22100 Lund Sweden
- CICS - Health Sciences Research Centre; University of Beira Interior; 6201-001 Covilhã Portugal
| | - João A. Queiroz
- CICS - Health Sciences Research Centre; University of Beira Interior; 6201-001 Covilhã Portugal
| | - Leif Bülow
- Department of Pure and Applied Biochemistry; Lund University; SE 22100 Lund Sweden
| |
Collapse
|
25
|
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]
|
26
|
Mahut M, Gargano A, Schuchnigg H, Lindner W, Lämmerhofer M. Chemoaffinity material for plasmid DNA analysis by high-performance liquid chromatography with condition-dependent switching between isoform and topoisomer selectivity. Anal Chem 2013; 85:2913-20. [PMID: 23391311 DOI: 10.1021/ac3034823] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Plasmid DNA may exist in three isoforms, the linear, open-circular (oc, "nicked"), and covalently closed circular (ccc, "supercoiled") form. We have recently reported on the chromatographic separation of supercoiled plasmid topoisomers on cinchona-alkaloid modified silica-based stationary phases. Herein, we present a selectivity switching mechanism to achieve separation of isoforms and/or supercoiled topoisomers using the very same chromatographic column and system. While salt gradient elution facilitates topoisomer separation, the supercoiled species are eluting as a single peak upon elution by a mixed pH and organic modifier gradient, still well separated from the other isoforms. We have found that a mobile phase pH value near the pI of the zwitterionic adsorbent surface leads to full recovery of all plasmid DNA isoforms, which is a major issue when using anion exchange-based resins. Furthermore, the observed elution pattern, oc < linear < ccc, is constant upon changes of mobile phase composition, gradient slope, and plasmid size. The remarkable isoform selectivity found on quinine-based selectors is explained by van't Hoff plots, revealing a different binding mechanism between the supercoiled plasmid on one hand and the oc and linear isoforms on the other hand.
Collapse
Affiliation(s)
- Marek Mahut
- Institute of Analytical Chemistry, University of Vienna, Währinger Strasse 38, A-1090 Vienna, Austria
| | | | | | | | | |
Collapse
|
27
|
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
| |
Collapse
|
28
|
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]
|
29
|
Tiainen P, Rokebul Anower M, Larsson PO. High-capacity composite adsorbents for nucleic acids. J Chromatogr A 2011; 1218:5235-40. [DOI: 10.1016/j.chroma.2011.06.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2011] [Revised: 05/17/2011] [Accepted: 06/01/2011] [Indexed: 10/18/2022]
|
30
|
Bhut BV, Weaver J, Carter AR, Wickramasinghe SR, Husson SM. The role of polymer nanolayer architecture on the separation performance of anion-exchange membrane adsorbers: Part II. DNA and virus separations. Biotechnol Bioeng 2011; 108:2654-60. [DOI: 10.1002/bit.23222] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2010] [Revised: 04/22/2011] [Accepted: 05/12/2011] [Indexed: 11/05/2022]
|
31
|
Poly(hydroxyethyl methacrylate) based affinity cryogel for plasmid DNA purification. Int J Biol Macromol 2011; 48:577-82. [DOI: 10.1016/j.ijbiomac.2011.01.022] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2010] [Revised: 01/25/2011] [Accepted: 01/26/2011] [Indexed: 11/19/2022]
|
32
|
Krajnc NL, Smrekar F, Štrancar A, Podgornik A. Adsorption behavior of large plasmids on the anion-exchange methacrylate monolithic columns. J Chromatogr A 2011; 1218:2413-24. [DOI: 10.1016/j.chroma.2010.12.058] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2010] [Revised: 12/11/2010] [Accepted: 12/14/2010] [Indexed: 01/13/2023]
|
33
|
Smrekar F, Ciringer M, Štrancar A, Podgornik A. Characterisation of methacrylate monoliths for bacteriophage purification. J Chromatogr A 2011; 1218:2438-44. [DOI: 10.1016/j.chroma.2010.12.083] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2010] [Revised: 12/16/2010] [Accepted: 12/18/2010] [Indexed: 01/10/2023]
|
34
|
Kim JY, Cho C, Cho BN. Plasmid DNA of high quality purified by activated charcoal. J Biosci Bioeng 2010; 110:608-13. [DOI: 10.1016/j.jbiosc.2010.06.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2010] [Revised: 06/16/2010] [Accepted: 06/22/2010] [Indexed: 01/29/2023]
|
35
|
Schmoeger E, Paril C, Tscheliessnig R, Jungbauer A. Adsorption of plasmid DNA on ceramic hydroxyapatite chromatographic materials. J Sep Sci 2010; 33:3125-36. [DOI: 10.1002/jssc.201000318] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
36
|
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.
Collapse
Affiliation(s)
- A Arpanaei
- Center for Microbial Biotechnology, Building 223, Institute for Systems Biology, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | | | | | | | | | | |
Collapse
|
37
|
Krajnc NL, Smrekar F, Černe J, Raspor P, Modic M, Krgovič D, Štrancar A, Podgornik A. Purification of large plasmids with methacrylate monolithic columns. J Sep Sci 2009; 32:2682-90. [DOI: 10.1002/jssc.200900260] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|