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Ebner J, Sedlmayr V, Klausser R. High Pressure Homogenization for Inclusion Body Isolation. Methods Mol Biol 2023; 2617:141-154. [PMID: 36656521 DOI: 10.1007/978-1-0716-2930-7_9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
High pressure homogenization (HPH) is a commonly used method for cell lysis of Escherichia coli in order to release intracellularly produced recombinant proteins. For misfolded proteins in E. coli, focus is often put on the development of a suitable solubilization and refolding protocol. However, HPH can be a critical unit operation influencing inclusion body (IB) quality and, subsequently, refolding yields. Here, a protocol for homogenization and IB washing is presented in combination with analytical methods suitable to evaluate these unit operations. The protocol is based on a multivariate approach to identify suitable conditions during HPH. Furthermore, the described workflow is easily scalable and can, therefore, also be used if fixed homogenization conditions are already established.
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Affiliation(s)
- Julian Ebner
- IBD Group, Institute of Chemical, Environmental and Bioscience Engineering, TU Wien, Vienna, Austria.
| | - Viktor Sedlmayr
- IBD Group, Institute of Chemical, Environmental and Bioscience Engineering, TU Wien, Vienna, Austria
| | - Robert Klausser
- IBD Group, Institute of Chemical, Environmental and Bioscience Engineering, TU Wien, Vienna, Austria
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2
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Kopp J, Bayer B, Slouka C, Striedner G, Dürkop M, Spadiut O. Fundamental insights in early-stage inclusion body formation. Microb Biotechnol 2022; 16:893-900. [PMID: 35830603 PMCID: PMC10128139 DOI: 10.1111/1751-7915.14117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 06/29/2022] [Accepted: 06/30/2022] [Indexed: 11/28/2022] Open
Abstract
Early-stage inclusion body formation is still mysterious. Literature is ambiguous about the existence of rod-shaped protein aggregates, a potential sponge-like inclusion body scaffold as well as the number of inclusion bodies per Escherichia coli cell. In this study, we verified the existence of rod-shaped inclusion bodies, confirmed their porous morphology, the presence of multiple protein aggregates per cell and modelled inclusion body formation as function of the number of generations.
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Affiliation(s)
- Julian Kopp
- Research Division Integrated Bioprocess Development, Institute of Chemical, Environmental and Bioscience, Vienna, Austria
| | - Benjamin Bayer
- Department of Biotechnology, University of Natural Resources and Life Sciences, Vienna, Austria.,Novasign GmbH, Vienna, Austria
| | - Christoph Slouka
- Research Division Integrated Bioprocess Development, Institute of Chemical, Environmental and Bioscience, Vienna, Austria
| | - Gerald Striedner
- Department of Biotechnology, University of Natural Resources and Life Sciences, Vienna, Austria.,Novasign GmbH, Vienna, Austria
| | - Mark Dürkop
- Department of Biotechnology, University of Natural Resources and Life Sciences, Vienna, Austria.,Novasign GmbH, Vienna, Austria
| | - Oliver Spadiut
- Research Division Integrated Bioprocess Development, Institute of Chemical, Environmental and Bioscience, Vienna, Austria
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3
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Ramon J, Gonçalves V, Alvarenga A, Saez V, Nele M, Alves T. Integrated Lab-Scale Process Combining Purification and PEGylation of l-Asparaginase from Zymomonas mobilis. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c00622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jose Ramon
- Department of Biochemical Engineering, School of Chemistry, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-909, Brazil
| | - Vinicius Gonçalves
- PEQ/COPPE, Universidade Federal do Rio de Janeiro, Cidade Universitária, Rio de Janeiro, RJ 21941-909, Brazil
| | - Aline Alvarenga
- PEQ/COPPE, Universidade Federal do Rio de Janeiro, Cidade Universitária, Rio de Janeiro, RJ 21941-909, Brazil
| | - Vivian Saez
- Department of Analytical Chemistry, Chemical Institute, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-909, Brazil
| | - Marcio Nele
- PEQ/COPPE, Universidade Federal do Rio de Janeiro, Cidade Universitária, Rio de Janeiro, RJ 21941-909, Brazil
| | - Tito Alves
- PEQ/COPPE, Universidade Federal do Rio de Janeiro, Cidade Universitária, Rio de Janeiro, RJ 21941-909, Brazil
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Marvibaigi M, Hosseini SM, Amini N. Launaea acanthodes (Boiss) O. Kuntze mediates hepatic glucose metabolism and ameliorates impaired pancreatic function in streptozotocin-induced diabetic rats. JOURNAL OF ETHNOPHARMACOLOGY 2021; 268:113577. [PMID: 33171271 DOI: 10.1016/j.jep.2020.113577] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Revised: 10/26/2020] [Accepted: 11/06/2020] [Indexed: 06/11/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Launaea acanthodes (Boiss.) O. Kuntze is native to semiarid regions of central Iran, traditionally used in the treatment of numerous disorders including diabetes. AIM OF THE STUDY The current study aimed to explore hypoglycemic activity of Launaea acanthodes extract in streptozotocin-induced diabetic rats. Furthermore, gene expression study was carried out to examine expression levels of key glucose metabolism-related genes. METHODS For in vitro study, Folin-Ciocalteus, DPPH and aluminum chloride colorimetric assays were used to determine the total phenolic content, antioxidant capacity and total flavonoid content of extracts, respectively. For in vivo study, streptozotocin-induced diabetic Wistar rats were orally administered with metformin (50 mg/kg) and various doses of extracts (100, 200 and 400 mg/kg body weight) for 28 days. Fasting blood glucose, body weight, food and water intake were assessed during the course of treatment. At the end of the intervention, oral glucose tolerance test (OGTT), lipid profile and glycated hemoglobin (HbA1c) were evaluated. Furthermore, functional liver enzymes, oxidative stress markers and histopathology of pancreas were examined. Lastly, quantitative real time polymerase chain reaction (qRT-PCR) was applied to explore the mRNA levels of genes relevant to glucose metabolism in the pancreas and liver tissues of diabetic rats. RESULTS Based on the in vitro results, the hydroalcoholic extract revealed potential radical scavenging activity and contained highest amount of phenolic and flavonoid. The in vivo results demonstrated that the extract lowered fasting blood glucose level, increased the body weight, restored the alterations in the levels of water and food intake, attenuated HbA1c, improved lipid profile and ameliorated the OGTT in diabetic rats. The extract administration alleviated the histopathological changes in the pancreas, suppressed malondialdehyde (MDA) level and further restored attenuated levels of aspartate aminotransferase (AST), alanine aminotransferase (ALT), glutathione peroxidase (GPx) and superoxide dismutase (SOD) in diabetic rats. Analysis of real time PCR data showed that extract administration reversed the expression levels of hepatic glucokinase (GK), phosphenolpyruvate carboxykinase (PEPCK) and glucose-6-phosphatase (G6Pase). Meanwhile, the extract upregulated the expression level of glucose transporter-2 (GLUT-2) and pancreatic-duodenal homeobox (PDX-1) in diabetic rats. CONCLUSION Collectively, the results demonstrate that Launaea acanthodes hydroalcoholic extract exerts hypoglycemic effect possibly via regulating key enzymes of glucose metabolism and ameliorating pancreatic dysfunction through its antioxidant properties.
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Affiliation(s)
- Mohsen Marvibaigi
- Medicine, Quran and Hadith Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Seyed Morteza Hosseini
- Medicine, Quran and Hadith Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.
| | - Neda Amini
- Department of Biology, Kavian Institute of Higher Education, Mashhad, Iran
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5
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Schottroff F, Kastenhofer J, Spadiut O, Jaeger H, Wurm DJ. Selective Release of Recombinant Periplasmic Protein From E. coli Using Continuous Pulsed Electric Field Treatment. Front Bioeng Biotechnol 2021; 8:586833. [PMID: 33634078 PMCID: PMC7900513 DOI: 10.3389/fbioe.2020.586833] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 12/29/2020] [Indexed: 11/13/2022] Open
Abstract
To date, high-pressure homogenization is the standard method for cell disintegration before the extraction of cytosolic and periplasmic protein from E. coli. Its main drawback, however, is low selectivity and a resulting high load of host cell impurities. Pulsed electric field (PEF) treatment may be used for selective permeabilization of the outer membrane. PEF is a process which is able to generate pores within cell membranes, the so-called electroporation. It can be readily applied to the culture broth in continuous mode, no additional chemicals are needed, heat generation is relatively low, and it is already implemented at industrial scale in the food sector. Yet, studies about PEF-assisted extraction of recombinant protein from bacteria are scarce. In the present study, continuous electroporation was employed to selectively extract recombinant Protein A from the periplasm of E. coli. For this purpose, a specifically designed flow-through PEF treatment chamber was deployed, operated at 1.5 kg/h, using rectangular pulses of 3 μs at specific energy input levels between 10.3 and 241.9 kJ/kg. Energy input was controlled by variation of the electric field strength (28.4-44.8 kV/cm) and pulse repetition frequency (50-1,000 Hz). The effects of the process parameters on cell viability, product release, and host cell protein (HCP), DNA, as well as endotoxin (ET) loads were investigated. It was found that a maximum product release of 89% was achieved with increasing energy input levels. Cell death also gradually increased, with a maximum inactivation of -0.9 log at 241.9 kJ/kg. The conditions resulting in high release efficiencies while keeping impurities low were electric field strengths ≤ 30 kV/cm and frequencies ≥ 825 Hz. In comparison with high-pressure homogenization, PEF treatment resulted in 40% less HCP load, 96% less DNA load, and 43% less ET load. Therefore, PEF treatment can be an efficient alternative to the cell disintegration processes commonly used in downstream processing.
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Affiliation(s)
- Felix Schottroff
- Institute of Food Technology, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria
- BOKU Core Facility Food & Bio Processing, Vienna, Austria
| | - Jens Kastenhofer
- Research Division Biochemical Engineering, Integrated Bioprocess Development, Institute of Chemical, Environmental and Bioscience Engineering, TU Wien, Vienna, Austria
| | - Oliver Spadiut
- Research Division Biochemical Engineering, Integrated Bioprocess Development, Institute of Chemical, Environmental and Bioscience Engineering, TU Wien, Vienna, Austria
| | - Henry Jaeger
- Institute of Food Technology, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria
| | - David J Wurm
- Research Division Biochemical Engineering, Integrated Bioprocess Development, Institute of Chemical, Environmental and Bioscience Engineering, TU Wien, Vienna, Austria
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A Chemometric Tool to Monitor and Predict Cell Viability in Filamentous Fungi Bioprocesses Using UV Chromatogram Fingerprints. Processes (Basel) 2020. [DOI: 10.3390/pr8040461] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Monitoring process variables in bioprocesses with complex expression systems, such as filamentous fungi, requires a vast number of offline methods or sophisticated inline sensors. In this respect, cell viability is a crucial process variable determining the overall process performance. Thus, fast and precise tools for identification of key process deviations or transitions are needed. However, such reliable monitoring tools are still scarce to date or require sophisticated equipment. In this study, we used the commonly available size exclusion chromatography (SEC) HPLC technique to capture impurity release information in Penicillium chrysogenum bioprocesses. We exploited the impurity release information contained in UV chromatograms as fingerprints for development of principal component analysis (PCA) models to descriptively analyze the process trends. Prediction models using well established approaches, such as partial least squares (PLS), orthogonal PLS (OPLS) and principal component regression (PCR), were made to predict the viability with model accuracies of 90% or higher. Furthermore, we demonstrated the platform applicability of our method by monitoring viability in a Trichoderma reesei process for cellulase production. We are convinced that this method will not only facilitate monitoring viability of complex bioprocesses but could also be used for enhanced process control with hybrid models in the future.
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Metzger KF, Padutsch W, Pekarsky A, Kopp J, Voloshin AM, Kühnel H, Maurer M. IGF1 inclusion bodies: A QbD based process approach for efficient USP as well as early DSP unit operations. J Biotechnol 2020; 312:23-34. [DOI: 10.1016/j.jbiotec.2020.02.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 02/04/2020] [Accepted: 02/26/2020] [Indexed: 12/20/2022]
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8
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High pressure homogenization is a key unit operation in inclusion body processing. J Biotechnol 2020; 324S:100022. [PMID: 34154734 DOI: 10.1016/j.btecx.2020.100022] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 05/24/2020] [Accepted: 06/10/2020] [Indexed: 11/23/2022]
Abstract
Recombinant protein production in E. coli often leads to the formation of inclusion bodies (IBs). Although downstream processing of IBs has the reputation of being a great hurdle, advantages of IBs can be substantial. Highly pure recombinant protein with the possibility of correctly folded structures and an easy separation from cell matter are decisive factors that make IB processes so interesting. Product yield, purity and biological activity of the refolded protein are the responses to evaluate an IB process. The objective of this case study was to develop a refolding process in an integrated manner. The effects of the unit operations 1) homogenization, 2) IB wash and 3) IB solubilisation as well as their interdependencies were analyzed. We revealed interesting factor interactions between homogenization and IB wash, as well as homogenization and solubilisation, which would be overlooked if the single unit operations were investigated individually. Furthermore, we found that homogenization was a key unit operation for IB processing. By changing the conditions during homogenization only, the product yield, purity and biological activity of the refolded product was affected 2-fold, 1.2-fold and 2.5-fold, respectively.
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Metzger KFJ, Voloshin A, Schillinger H, Kühnel H, Maurer M. Adsorptive filtration: A case study for early impurity reduction in an Escherichia coli production process. Biotechnol Prog 2019; 36:e2948. [PMID: 31837191 DOI: 10.1002/btpr.2948] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 11/22/2019] [Accepted: 12/08/2019] [Indexed: 11/10/2022]
Abstract
Primary recovery of intracellular products from Escherichia coli requires cell disruption which leads to a massive release of process-related impurities burdening subsequent downstream process (DSP) unit operations. Especially, DNA and endotoxins challenge purification operations due to their size and concentrations. Consequently, an early reduction in impurities will not only simplify the production process but also increase robustness while alleviating the workload afterward. In the present work, we studied the proof of concept whether a nonwoven anion exchange filter material decreases soluble impurities immediately at the clarification step of E. coli DSP. In a first attempt, endotoxin burden was reduced by 4.6-fold and the DNA concentration by 3.6-fold compared to conventional depth filtration. A design of experiment for the adsorptive filtration approach was carried out to analyze the influence of different critical process parameters (CPPs) on impurity reduction. We showed that depending on the CPPs chosen, a DNA lowering of more than 3 log values, an endotoxin decrease of approximately 7 logs, and a minor HCP clearance of at least 0.3 logs could be achieved. Thus, we further revealed a chromatography column protecting effect when using adsorptive filtration beforehand.
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Affiliation(s)
- Karl F J Metzger
- Life Sciences, University of Applied Sciences Campus Vienna, Wien, AT, Austria.,Bioprocess Engineering, Austrian Centre of Industrial Biotechnology, Wien, AT, Austria.,Department of Biotechnology, University of Natural Resources and Life Sciences Vienna, Wien, AT, Austria
| | - Alexei Voloshin
- 3M Company, Separation and Purification Sciences Division, 3M Center, Saint Paul, Minnesota
| | - Harald Schillinger
- Life Sciences, University of Applied Sciences Campus Vienna, Wien, AT, Austria.,3M Österreich, 3M Separation and Purification Sciences Division, Wien, AT, Austria
| | - Harald Kühnel
- Life Sciences, University of Applied Sciences Campus Vienna, Wien, AT, Austria
| | - Michael Maurer
- Life Sciences, University of Applied Sciences Campus Vienna, Wien, AT, Austria.,Bioprocess Engineering, Austrian Centre of Industrial Biotechnology, Wien, AT, Austria
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10
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Pekarsky A, Konopek V, Spadiut O. The impact of technical failures during cultivation of an inclusion body process. Bioprocess Biosyst Eng 2019; 42:1611-1624. [PMID: 31267174 PMCID: PMC6751153 DOI: 10.1007/s00449-019-02158-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Accepted: 06/04/2019] [Indexed: 12/22/2022]
Abstract
In biotechnological processes, technical failures in the upstream process often lead to batch loss. It is of great interest to investigate the empirical impact of technical failures to understand and mitigate their impact accurately and reduce economic damage. We investigated the impact in the upstream and downstream of a recombinant antibody fragment inclusion body production process chain to provide integrated empirical data and knowledge. First, we provided a reproducible process chain that yielded high inclusion body content, high specific product titer, and a refolding yield of 30%. The inclusion body downstream proved to be of high reproducibility. Through the intended introduction of technical failures, we were not only able to shed more light on the empirical responses in the upstream and downstream, but also on process-boosting parameters that would have been neglected. Herein, a short increase in temperature during the cultivation clearly increased the refolding yield.
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Affiliation(s)
- Alexander Pekarsky
- Institute of Chemical, Environmental and Bioscience Engineering, Research Area Biochemical Engineering, Technische Universität Wien, Gumpendorfer Strasse 1a, 1060 Vienna, Austria
| | - Vanessa Konopek
- Institute of Chemical, Environmental and Bioscience Engineering, Research Area Biochemical Engineering, Technische Universität Wien, Gumpendorfer Strasse 1a, 1060 Vienna, Austria
| | - Oliver Spadiut
- Institute of Chemical, Environmental and Bioscience Engineering, Research Area Biochemical Engineering, Technische Universität Wien, Gumpendorfer Strasse 1a, 1060 Vienna, Austria
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11
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pH conditioning is a crucial step in primary recovery - A case study for a recombinant Fab from E. coli. Protein Expr Purif 2019; 165:105504. [PMID: 31560987 DOI: 10.1016/j.pep.2019.105504] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 09/23/2019] [Indexed: 11/23/2022]
Abstract
Primary recovery of recombinant proteins from E. coli often describes a major challenge in downstream processing. After product release, the target protein usually accounts for only a small amount of total protein and has to be separated from a complex mixture of host cell proteins (HCPs) and non-proteinogenic impurities, such as DNA and lipids. Non-optimized procedures as well as unfavorable conditions at the extraction step and conditioning cause significant product loss already prior capture. In this study, we investigated pH conditioning during primary recovery for a subsequent cation exchange chromatography (CEX)-based capture of a recombinant Fab produced in E. coli. We showed that pH ≤ 5.0, which is necessary for CEX, led to high product loss due to protein precipitation during cell disruption and pH conditioning. Thus, we developed a procedure that resulted in a 25% increased Fab recovery prior capture based on simple re-arrangement of process steps and the use of a low-cost stabilizing agent. Summarizing, we show the huge potential for simple and cheap improvement of overall downstream process recovery by optimization of pH conditioning during primary product recovery.
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12
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Walch N, Scharl T, Felföldi E, Sauer DG, Melcher M, Leisch F, Dürauer A, Jungbauer A. Prediction of the Quantity and Purity of an Antibody Capture Process in Real Time. Biotechnol J 2019; 14:e1800521. [DOI: 10.1002/biot.201800521] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 01/31/2019] [Indexed: 01/16/2023]
Affiliation(s)
- Nicole Walch
- Austrian Centre of Industrial Biotechnology Muthgasse 18 A‐1190 Vienna Austria
- Department of BiotechnologyUniversity of Natural Resources and Life SciencesVienna Muthgasse 18 A‐1190 Vienna Austria
| | - Theresa Scharl
- Austrian Centre of Industrial Biotechnology Muthgasse 18 A‐1190 Vienna Austria
- Institute of StatisticsUniversity of Natural Resources and Life Sciences ViennaPeter‐Jordan‐Straße 82 A‐1190 Vienna Austria
| | - Edit Felföldi
- Austrian Centre of Industrial Biotechnology Muthgasse 18 A‐1190 Vienna Austria
- Department of BiotechnologyUniversity of Natural Resources and Life SciencesVienna Muthgasse 18 A‐1190 Vienna Austria
| | - Dominik G. Sauer
- Austrian Centre of Industrial Biotechnology Muthgasse 18 A‐1190 Vienna Austria
- Department of BiotechnologyUniversity of Natural Resources and Life SciencesVienna Muthgasse 18 A‐1190 Vienna Austria
| | - Michael Melcher
- Austrian Centre of Industrial Biotechnology Muthgasse 18 A‐1190 Vienna Austria
- Institute of StatisticsUniversity of Natural Resources and Life Sciences ViennaPeter‐Jordan‐Straße 82 A‐1190 Vienna Austria
| | - Friedrich Leisch
- Austrian Centre of Industrial Biotechnology Muthgasse 18 A‐1190 Vienna Austria
- Institute of StatisticsUniversity of Natural Resources and Life Sciences ViennaPeter‐Jordan‐Straße 82 A‐1190 Vienna Austria
| | - Astrid Dürauer
- Austrian Centre of Industrial Biotechnology Muthgasse 18 A‐1190 Vienna Austria
- Department of BiotechnologyUniversity of Natural Resources and Life SciencesVienna Muthgasse 18 A‐1190 Vienna Austria
| | - Alois Jungbauer
- Austrian Centre of Industrial Biotechnology Muthgasse 18 A‐1190 Vienna Austria
- Department of BiotechnologyUniversity of Natural Resources and Life SciencesVienna Muthgasse 18 A‐1190 Vienna Austria
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13
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Pekarsky A, Spadiut O, Rajamanickam V, Wurm DJ. A fast and simple approach to optimize the unit operation high pressure homogenization - a case study for a soluble therapeutic protein in E. coli. Prep Biochem Biotechnol 2019; 49:74-81. [PMID: 30664394 DOI: 10.1080/10826068.2018.1536988] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Escherichia coli is one of the most commonly used host organisms for the production of recombinant biopharmaceuticals. E. coli is usually characterized by fast growth on cheap media and high productivity, but one drawback is its intracellular product formation. Product recovery from E. coli bioprocesses requires tedious downstream processing (DSP). A typical E. coli DSP for an intracellular product starts with a cell disruption step to access the product. Different methods exist, but a scalable process is usually achieved by high pressure homogenization (HPH). The protocols for HPH are often applied universally without adapting them to the recombinant product, even though HPH can affect product quantity and quality. Based on our previous study on cell disruption efficiency, we aimed at screening operational conditions to maximize not only product quantity, but also product quality of a soluble therapeutic protein expressed in E. coli. We screened for critical process parameters (CPPs) using a multivariate approach (design of experiments; DoE) during HPH to maximize product titer and achieve sufficient product quality, based on predefined critical quality attributes (CQAs). In this case study, we were able to gain valuable knowledge on the efficiency of HPH on E. coli cell disruption, product release and its impact on CQAs. Our results show that HPH is a key unit operation that has to be optimized for each product.
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Affiliation(s)
- Alexander Pekarsky
- a Research Division Biochemical Engineering , Institute of Chemical, Environmental and Bioscience Engineering, TU Wien , Vienna , Austria
| | - Oliver Spadiut
- a Research Division Biochemical Engineering , Institute of Chemical, Environmental and Bioscience Engineering, TU Wien , Vienna , Austria
| | - Vignesh Rajamanickam
- b Christian Doppler Laboratory for Mechanistic and Physiological Methods for Improved Bioprocesses , Institute of Chemical, Environmental and Bioscience Engineering, TU Wien , Vienna , Austria
| | - David J Wurm
- a Research Division Biochemical Engineering , Institute of Chemical, Environmental and Bioscience Engineering, TU Wien , Vienna , Austria
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14
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Eggenreich B, Scholz E, Wurm DJ, Forster F, Spadiut O. The production of a recombinant tandem single chain fragment variable capable of binding prolamins triggering celiac disease. BMC Biotechnol 2018; 18:30. [PMID: 29843684 PMCID: PMC5975707 DOI: 10.1186/s12896-018-0443-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 05/09/2018] [Indexed: 12/13/2022] Open
Abstract
Background Celiac disease (CD) is one of the most common food-related chronic disorders. It is mediated by the dietary consumption of prolamins, which are storage proteins of different grains. So far, no therapy exists and patients are bound to maintain a lifelong diet to avoid symptoms and long-term complications. To support those patients we developed a tandem single chain Fragment variable (tscFv) acting as a neutralizing agent against prolamins. We recombinantly produced this molecule in E. coli, but mainly obtained misfolded product aggregates, so-called inclusion bodies, independent of the cultivation strategy we applied. Results In this study, we introduce this novel tscFv against CD and present our strategy of obtaining active product from inclusion bodies. The refolded tscFv shows binding capabilities towards all tested CD-triggering grains. Compared to a standard polyclonal anti-PT-gliadin-IgY, the tscFv displays a slightly reduced affinity towards digested gliadin, but an additional affinity towards prolamins of barley. Conclusion The high binding specificity of tscFv towards prolamin-containing grains makes this novel molecule a valuable candidate to support patients suffering from CD in the future. Electronic supplementary material The online version of this article (10.1186/s12896-018-0443-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Britta Eggenreich
- Research Division Biochemical Engineering, Institute of Chemical, Environmental and Bioscience Engineering, TU Wien, Vienna, Austria
| | - Elke Scholz
- Sciotec Diagnostics Technologies GmbH, Ziegelfeldstr. 3, 3430, Tulln, Austria
| | - David Johannes Wurm
- Research Division Biochemical Engineering, Institute of Chemical, Environmental and Bioscience Engineering, TU Wien, Vienna, Austria
| | - Florian Forster
- Sciotec Diagnostics Technologies GmbH, Ziegelfeldstr. 3, 3430, Tulln, Austria.
| | - Oliver Spadiut
- Research Division Biochemical Engineering, Institute of Chemical, Environmental and Bioscience Engineering, TU Wien, Vienna, Austria.
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15
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Gundinger T, Pansy A, Spadiut O. A sensitive and robust HPLC method to quantify recombinant antibody fragments in E . coli crude cell lysate. J Chromatogr B Analyt Technol Biomed Life Sci 2018; 1083:242-248. [DOI: 10.1016/j.jchromb.2018.02.044] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 02/19/2018] [Accepted: 02/28/2018] [Indexed: 12/01/2022]
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