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Dhandapani G, Wachtel E, Das I, Sheves M, Patchornik G. Conjugated Detergent Micelles as a Platform for IgM Purification. Biotechnol Bioeng 2022; 119:1997-2003. [PMID: 35324016 PMCID: PMC9325453 DOI: 10.1002/bit.28089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 01/31/2022] [Accepted: 03/20/2022] [Indexed: 12/02/2022]
Abstract
Immunoglobulin M (IgM) antibodies hold promise as anticancer drugs and as agents for promoting immune homeostasis. This promise has not been realized due to low expression levels in mammalian cells producing IgM class antibodies, and the failure of protein A chromatography for IgM purification. Here, we describe a nonchromatographic platform for quantitatively capturing IgMs at neutral pH, which is then recovered with 86%–94% yield and >95% purity at pH 3. The platform contains micelles conjugated with the [(bathophenanthroline)3:Fe2+] amphiphilic complex. Inclusion of amino acid monomers, for example, phenylalanine or tyrosine, during conjugation of detergent micelles, allows subsequent extraction of IgMs at close to neutral pH. With the successful implementation of this purification platform for both polyclonal humans and bovine IgMs, we anticipate similar results for monoclonal IgMs, most relevant for the pharmaceutical industry.
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Affiliation(s)
| | - Ellen Wachtel
- Faculty of Chemistry, Weizmann Institute of Science, 76100, Rehovot, Israel
| | - Ishita Das
- Faculty of Chemistry, Weizmann Institute of Science, 76100, Rehovot, Israel
| | - Mordechai Sheves
- Faculty of Chemistry, Weizmann Institute of Science, 76100, Rehovot, Israel
| | - Guy Patchornik
- Department of Chemical Sciences, Ariel University, 70400, Ariel, Israel
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Khosravi R, Hosseini SN, Javidanbardan A, Khatami M, Kaghazian H, Mousavi Nasab SD. Optimization of non-detergent treatment for enveloped virus inactivation using the Taguchi design of experimental methodology (DOE). Prep Biochem Biotechnol 2019; 49:686-694. [PMID: 31035907 DOI: 10.1080/10826068.2019.1599398] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
In mammalian cell culture technology, viral contamination is one of the main challenges; and, so far, various strategies have been taken to remove or inactivate viruses in the cell-line production process. The suitability and feasibility of each method are determined by different factors including effectiveness in target virus inactivation, maintaining recombinant protein stability, easiness-in terms of the process condition, cost-effectiveness, and eco-friendliness. In this research, Taguchi design-of-experiments (DOE) methodology was used to optimize a non-detergent viral inactivation method via considering four factors of temperature, time, pH, and alcohol concentration in an unbiased (orthogonal) fashion with low influence of nuisance factors. Herpes Simplex Virus-1 (HSV1) and Vero cell-line were used as models for enveloped viruses and cell-line, respectively. Examining the cytopathic effects (CPE) in different dilutions showed that pH (4), alcohol (15%), time (120 min), and temperature (25 °C) were the optimal points for viral inactivation. Evaluating the significance of each parameter in the HSV-1 inactivation using Taguchi and ANOVA analyses, the contributions of pH, alcohol, temperature and time were 56.5%, 19.2%, 12%, and 12%, respectively. Examining the impact of the optimal viral treatment condition on the stability of model recombinant protein-recombinant human erythropoietin, no destabilization was detected.
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Affiliation(s)
- Roya Khosravi
- a Department of Recombinant Hepatitis B Vaccine, Production and Research Complex , Pasteur Institute of Iran , Tehran , Iran
| | - Seyed Nezamedin Hosseini
- a Department of Recombinant Hepatitis B Vaccine, Production and Research Complex , Pasteur Institute of Iran , Tehran , Iran.,b Viral Vaccines Research Center , Pasteur Institute of Iran , Tehran , Iran
| | - Amin Javidanbardan
- a Department of Recombinant Hepatitis B Vaccine, Production and Research Complex , Pasteur Institute of Iran , Tehran , Iran
| | - Maryam Khatami
- a Department of Recombinant Hepatitis B Vaccine, Production and Research Complex , Pasteur Institute of Iran , Tehran , Iran
| | - Hooman Kaghazian
- a Department of Recombinant Hepatitis B Vaccine, Production and Research Complex , Pasteur Institute of Iran , Tehran , Iran.,b Viral Vaccines Research Center , Pasteur Institute of Iran , Tehran , Iran
| | - Seyed Dawood Mousavi Nasab
- a Department of Recombinant Hepatitis B Vaccine, Production and Research Complex , Pasteur Institute of Iran , Tehran , Iran
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Venkiteshwaran A, Fogle J, Patnaik P, Kowle R, Chen D. Mechanistic evaluation of virus clearance by depth filtration. Biotechnol Prog 2015; 31:431-7. [PMID: 25683459 DOI: 10.1002/btpr.2061] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Revised: 01/27/2015] [Indexed: 11/07/2022]
Abstract
Virus clearance by depth filtration has not been well-understood mechanistically due to lack of quantitative data on filter charge characteristics and absence of systematic studies. It is generally believed that both electrostatic interactions and sized based mechanical entrapment contribute to virus clearance by depth filtration. In order to establish whether the effectiveness of virus clearance correlates with the charge characteristics of a given depth filter, a counter-ion displacement technique was employed to determine the ionic capacity for several depth filters. Two depth filters (Millipore B1HC and X0HC) with significant differences in ionic capacities were selected and evaluated for their ability to eliminate viruses. The high ionic capacity X0HC filter showed complete porcine parvovirus (PPV) clearance (eliminating the spiked viruses to below the limit of detection) under low conductivity conditions (≤2.5 mS/cm), achieving a log10 reduction factor (LRF) of > 4.8. On the other hand, the low ionic capacity B1HC filter achieved only ∼2.1-3.0 LRF of PPV clearance under the same conditions. These results indicate that parvovirus clearance by these two depth filters are mainly achieved via electrostatic interactions between the filters and PPV. When much larger xenotropic murine leukemia virus (XMuLV) was used as the model virus, complete retrovirus clearance was obtained under all conditions evaluated for both depth filters, suggesting the involvement of mechanisms other than just electrostatic interactions in XMuLV clearance.
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Affiliation(s)
- Adith Venkiteshwaran
- Dept. of Bioproduct Research, Bioproduct Research and Development, Lilly Research Laboratories, Eli Lilly and Company, DC3941 Lilly Corporate Center, Indianapolis, Indiana
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Mousavi Hosseini K, Nasiri S. Preparation of factor VII concentrate using CNBr-activated Sepharose 4B immunoaffinity chromatography. Med J Islam Repub Iran 2015; 29:170. [PMID: 26034723 PMCID: PMC4431444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2014] [Accepted: 11/18/2014] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND Factor VII concentrates are used in patients with congenital or acquired factor VII deficiency or treatment of hemophilia patients with inhibitors. In this research, immunoaffinity chromatography was used to purify factor VII from prothrombin complex (Prothrombin- Proconvertin-Stuart Factor-Antihemophilic Factor B or PPSB) which contains coagulation factors II, VII, IX and X. The aim of this study was to improve purity, safety and tolerability as a highly purified factor VII concentrate. METHODS PPSB was prepared using DEAE-Sephadex and was used as the starting material for purification of coagulation factor VII. Prothrombin complex was treated by solvent/detergent at 24°C for 6 h with constant stirring. The mixture of PPSB in the PBS buffer was filtered and then chromatographed using CNBr-activated Sepharose 4B coupled with specific antibody. Factors II, IX, VII, X and VIIa were assayed on the fractions. Fractions of 48-50 were pooled and lyophilized as a factor VII concentrate. Agarose gel electrophoresis was performed and Tween 80 was measured in the factor VII concentrate. RESULTS Specific activity of factor VII concentrate increased from 0.16 to 55.6 with a purificationfold of 347.5 and the amount of activated factor VII (FVIIa) was found higher than PPSB (4.4-fold). RESULTS of electrophoresis on agarose gel indicated higher purity of Factor VII compared to PPSB; these finding revealed that factor VII migrated as alpha-2 proteins. In order to improve viral safety, solvent-detergent treatment was applied prior to further purification and nearly complete elimination of tween 80 (2 μg/ml). CONCLUSION It was concluded that immuonoaffinity chromatography using CNBr-activated Sepharose 4B can be a suitable choice for large-scale production of factor VII concentrate with higher purity, safety and activated factor VII.
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Affiliation(s)
- Kamran Mousavi Hosseini
- 1 Associate Professor, Blood Transfusion Research Center, High Institute for Research and Education in Transfusion Medicine, Tehran, Iran.
| | - Saleh Nasiri
- 2 Assistant Professor, Blood Transfusion Research Center, High Institute for Research and Education in Transfusion Medicine, Tehran, Iran.
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Chen J, Yin W, Xia X. Transcriptome Profiles of Populus euphratica upon Heat Shock stress. Curr Genomics 2014; 15:326-40. [PMID: 25435796 PMCID: PMC4245693 DOI: 10.2174/138920291505141106101835] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2014] [Revised: 09/08/2014] [Accepted: 09/08/2014] [Indexed: 11/30/2022] Open
Abstract
Heat stress, which strongly affects plant performance and often results in reduced vegetative growth and yields depression, has become an increasingly serious global problem. Populus euphratica Oliv. which has been considered as a tree model for the study of plant response to abiotic stresses, could be resistant to an extremely wide environmental temperature range (–40 °C to 45 °C). Previous study is mainly focused on its gene regulation upon drought and salt stress. However, little is known about gene regulation at the global transcriptome level upon heat stress. To understand the gene network controlling heat stress in P. euphratica, a transcriptome sequencing using Illumina Hiseq 2000 was performed to generate a 10 gigabases depth for each sample in the tissue of leaf. 119,573 unigeneswere generated with an average length of 474 bp. Approximately 49,605 (41.49%) unigenes exhibited significantly different expressions between two libraries. Among these unigenes, 11,165 (9.34%) were upregulated and 38,440 (32.15%) were down regulated. Heat shock proteins classified as molecular chaperones showed a significant percentage (1.13%) in the up regulated group. Heat responsive genes, such as polyubiquitins, were over expressed in heat treated sample. GO enrichment analysis revealed that the Go terms for differentially expressed unigenes were significantly enriched in hormone-mediated signal, biological process regulation and metabolic process regulation. Our data revealed a global transcriptome picture of P. euphratica in response to heat shock. The identified potential heat stress-related transcripts can be used to infer the gene regulation networks underlying the molecular mechanisms of heat response in P. euphratica.
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Affiliation(s)
- Jinhuan Chen
- National Engineering Laboratory for Tree Breeding, Beijing Forestry University Beijing 100083, China ; College of Biological Sciences and technology, Beijing Forestry University Beijing 100083, China
| | - Weilun Yin
- National Engineering Laboratory for Tree Breeding, Beijing Forestry University Beijing 100083, China ; College of Biological Sciences and technology, Beijing Forestry University Beijing 100083, China
| | - Xinli Xia
- National Engineering Laboratory for Tree Breeding, Beijing Forestry University Beijing 100083, China ; College of Biological Sciences and technology, Beijing Forestry University Beijing 100083, China
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Caricati CP, Oliveira‐Nascimento L, Yoshida JT, Stephano MA, Caricati ATP, Raw I. Safety of snake antivenom immunoglobulins: efficacy of viral inactivation in a complete downstream process. Biotechnol Prog 2013; 29:972-9. [PMID: 23804299 PMCID: PMC7161767 DOI: 10.1002/btpr.1758] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Revised: 05/14/2013] [Indexed: 12/26/2022]
Abstract
Viral safety remains a challenge when processing a plasma-derived product. A variety of pathogens might be present in the starting material, which requires a downstream process capable of broad viral reduction. In this article, we used a wide panel of viruses to assess viral removal/inactivation of our downstream process for Snake Antivenom Immunoglobulin (SAI). First, we screened and excluded equine plasma that cross-reacted with any model virus, a procedure not published before for antivenoms. In addition, we evaluated for the first time the virucidal capacity of phenol applied to SAI products. Among the steps analyzed in the process, phenol addition was the most effective one, followed by heat, caprylic acid, and pepsin. All viruses were fully inactivated only by phenol treatment; heat, the second most effective step, did not inactivate the rotavirus and the adenovirus used. We therefore present a SAI downstream method that is cost-effective and eliminates viruses to the extent required by WHO for a safe product.
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Affiliation(s)
| | | | - J. T. Yoshida
- Faculdade de Ciências FarmacêuticasUniversidade de Sao Paulo (USP)Sao PauloSPBrazil
| | - M. A. Stephano
- Faculdade de Ciências FarmacêuticasUniversidade de Sao Paulo (USP)Sao PauloSPBrazil
| | | | - I. Raw
- Instituto ButantanSao PauloSPBrazil
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7
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Valdés R, Tamayo A, González M, Padilla S, Geada D, Ferro W, Milá L, Gómez L, Alemán R, Leyva A, García C, Mendoza O, Alvarez T, Dorta L, Villega Y, Cecilia D, Aragón H, González T, La O M, López J. Production of a monoclonal antibody by ascites, hollow fiber system, and transgenic plants for vaccine production using CB.Hep-1 mAb as a study case. BIOTECHNOL BIOPROC E 2012. [DOI: 10.1007/s12257-011-0196-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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8
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Zhang M, Lute S, Norling L, Hong C, Safta A, O'Connor D, Bernstein LJ, Wang H, Blank G, Brorson K, Chen Q. A Novel, Q-PCR Based Approach to Measuring Endogenous Retroviral Clearance by Capture Protein A Chromatography. Biotechnol Bioeng 2009; 102:1438-47. [DOI: 10.1002/bit.22172] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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9
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Valdés R, Álvarez T, Tamayo A, Fernandez EG, Montero J, Geada D, Ferro W, Medina Y, Guevara Y, Padilla S, Cecilia D, Dorta L, González M, Sosa R, González T. New Mab CB.Hep-1 Purification Process Eliminates the Need for Pre-Chromatographic Purification. Stability Demonstrated Over 100 Purification Cycles. Chromatographia 2008. [DOI: 10.1365/s10337-008-0607-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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10
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Heldt CL, Gurgel PV, Jaykus L, Carbonell RG. Identification of trimeric peptides that bind porcine parvovirus from mixtures containing human blood plasma. Biotechnol Prog 2008; 24:554-60. [PMID: 18470993 PMCID: PMC7161850 DOI: 10.1021/bp070412c] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2007] [Accepted: 04/07/2008] [Indexed: 01/26/2023]
Abstract
Virus contamination in human therapeutics is of growing concern as more therapeutic products from animal or human sources come into the market. All biopharmaceutical processes are required to have at least two distinct viral clearance steps to remove viruses. Most of these steps work well for enveloped viruses and large viruses, whether enveloped or not. That leaves a class of small non-enveloped viruses, like parvoviruses and hepatitis A, which are not easily removed by these typical steps. In this study, we report the identification of trimeric peptides that bind specifically to porcine parvovirus (PPV) and their potential use to remove this virus from process solutions. All of the trimeric peptides isolated completely removed all detectable PPV from buffer in the first nine column volumes, corresponding to a clearance of 4.5-5.5 log of infectious virus. When the virus was spiked into a more complex matrix consisting of 7.5% human blood plasma, one of the trimers, WRW, was able to remove all detectable PPV in the first three column volumes, after which human blood plasma began to interfere with the binding of the virus to the peptide resin. These trimer resins removed considerably more virus than weak ion exchange resins. The results of this work indicate that small peptide ligand resins have the potential to be used in virus removal processes where removal of contaminating virus is necessary to ensure product safety.
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Affiliation(s)
- Caryn L. Heldt
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695
| | - Patrick V. Gurgel
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695
- ProMetic Life Sciences, Montreal, Canada
| | - Lee‐Ann Jaykus
- Department of Food, Bioprocessing and Nutrition Science, North Carolina State University, Raleigh, North Carolina 27695
| | - Ruben G. Carbonell
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695
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11
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Bailey MR, Chen D, Emery WR, Lambooy PK, Nolting J, Quertinmont MT, Shamlou PA. Evaluation of microfluidics reactor technology on the kinetics of virus inactivation. Biotechnol Bioeng 2008; 99:1384-91. [PMID: 18023056 DOI: 10.1002/bit.21714] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Mammalian cell lines constitute an important part in the manufacture of therapeutic proteins. However, their susceptibility to virus contamination is a potential risk to patient safety and productivity, and has led to the development of a repertoire of virus inactivation techniques. From a process development viewpoint, the challenge is to demonstrate the required log reduction in virus content without a significant loss in product titer or quality. The balance between the two is dictated by the kinetics of virus inactivation and protein degradation, both of which are critically affected by process parameters. In this study we describe a commercially available microchannel reactor (MCR) and demonstrate how it can be used to evaluate the impact of temperature on the kinetics of virus inactivation and protein product degradation. Virus spiking experiments are reported using Xenotropic Murine Leukemia Virus and REOvirus, into buffers in the absence and presence of a therapeutic protein currently under development at Lilly. The results demonstrate that the MCR is an ideal platform for evaluation of fast reactive systems and reactions that are particularly sensitive to small changes to process conditions. These conditions include heat inactivation of a virus in a mammalian cell culture process stream used in the manufacture of therapeutic proteins and antibodies.
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Affiliation(s)
- Mark R Bailey
- Bioprocess Research and Development, Lilly Research Labs, Eli Lilly & Co, Indianapolis, Indiana, USA
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12
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Han B, Specht R, Wickramasinghe SR, Carlson JO. Binding Aedes aegypti densonucleosis virus to ion exchange membranes. J Chromatogr A 2006; 1092:114-24. [PMID: 16188566 DOI: 10.1016/j.chroma.2005.06.089] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2004] [Revised: 04/30/2005] [Accepted: 06/27/2005] [Indexed: 11/25/2022]
Abstract
Experimental and numerical results for binding Aedes aegypti densonucleosis virus (AeDNV) using anion and cation exchange membranes are presented. AeDNV particles are adsorbed by anion and cation exchange membranes providing the virus particles and membranes are oppositely charged. Q membranes which are strongly basic anion exchangers were the most effective. Dynamic and static capacities for Q membranes were found to be similar. A numerical model is proposed which assumes a log normal pore size distribution. By estimating the required parameters from static binding experiments, the model may be used to calculate the breakthrough curve for virus adsorption.
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Affiliation(s)
- Binbing Han
- Department of Chemical Engineering, Colorado State University, Fort Collins, CO 80523-1370, USA
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Hahn R, Shimahara K, Steindl F, Jungbauer A. Comparison of protein A affinity sorbents III. Life time study. J Chromatogr A 2005; 1102:224-31. [PMID: 16325191 DOI: 10.1016/j.chroma.2005.10.083] [Citation(s) in RCA: 90] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2005] [Revised: 10/28/2005] [Accepted: 10/31/2005] [Indexed: 10/25/2022]
Abstract
Protein A affinity chromatography is a popular purification method for immunoglobulins applied at various scales, ranging from micro-tube up to 1000l column format. Three novel high capacity protein A affinity chromatography media have been subjected to a lifetime study using 50 consecutive purification cycles of a cell culture supernatant (CCS) containing a monoclonal antibody. Chromatographic conditions followed protocols used in industrial antibody processing, including stripping and cleaning-in-place of the resins. For all three media, no significant loss of purification performance (measured by sodium dodecylsulfate polyacrylamide gel electrophoresis and analytical size-exclusion chromatography (SEC)) could be observed over 50 cycles. Eluate samples were analyzed for leaked protein A and host cell protein (HCP) content. MabSelect SuRe, the first protein A affinity medium compatible with alkaline regeneration conditions, exhibited the lowest leakage levels, in the range of 1-3 ppm. For the media MabSelect Xtra and ProSep-vA Ultra, leakage levels were in the range of 30-40 ppm. Host cell protein content of eluates from MabSelect Xtra and SuRe were between 300 and 700 ppm, whereas for ProSep-vA Ultra 3000-4000 ppm was achieved.
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Affiliation(s)
- Rainer Hahn
- Department of Biotechnology, University of Natural Resources and Applied Life Sciences, Muthgasse 18, A-1190 Vienna, Austria
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14
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Follman DK, Fahrner RL. Factorial screening of antibody purification processes using three chromatography steps without protein A. J Chromatogr A 2004; 1024:79-85. [PMID: 14753709 DOI: 10.1016/j.chroma.2003.10.060] [Citation(s) in RCA: 153] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Protein A affinity chromatography is often employed as a capture step to meet the purity, yield, and throughput requirements for pharmaceutical antibody purification. However, a trade-off exists between step performance and price. Protein A resin removes 99.9% of feed stream impurities; however, its price is significantly greater than those of non-affinity media. With many therapeutic indications for antibodies requiring high doses and/or chronic administration, the consideration of process economics is critical. We have systematically evaluated the purification performance of cation-exchange, anion-exchange, hydroxyapatite, hydrophobic interaction, hydrophobic charge induction, and small-molecule ligand resins in each step of a three-step chromatographic purification process for a CHO-derived monoclonal antibody. Host cell proteins were removed to less-than-detectable for three processes (cation-exchange-anion-exchange-hydrophobic interaction chromatography, cation-exchange-anion-exchange-mixed cation-exchange chromatography, and cation-exchange-mixed cation-exchange-anion-exchange chromatography). The order of the process steps affected purification performance significantly.
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Affiliation(s)
- Deborah K Follman
- Department of Recovery Sciences, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA.
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15
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Ramírez N, Rodríguez M, Ayala M, Cremata J, Pérez M, Martínez A, Linares M, Hevia Y, Páez R, Valdés R, Gavilondo JV, Selman-Housein G. Expression and characterization of an anti-(hepatitis B surface antigen) glycosylated mouse antibody in transgenic tobacco (Nicotiana tabacum) plants and its use in the immunopurification of its target antigen. Biotechnol Appl Biochem 2003; 38:223-30. [PMID: 12797866 DOI: 10.1042/ba20030028] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2003] [Revised: 05/09/2003] [Accepted: 06/10/2003] [Indexed: 11/17/2022]
Abstract
Transgenic plants expressing recombinant immunoglobulins have arisen as an alternative technology for the large-scale production of antibodies useful in therapeutics and in industrial processes. In the present paper we report the expression in transgenic tobacco ( Nicotiana tabacum ) of an anti-HBsAg [anti-(hepatitis B virus surface antigen)] mouse IgG1 mAb (monoclonal antibody), currently used for the industrial purification of the recombinant vaccine antigen. Using the sweet potato sporamin signal peptide, a KDEL (Lys-Asp-Glu-Leu) ER (endoplasmic reticulum) anchorage domain, and a heavy- and light-chain gene tandem construction, we generated F1 plants in which the expression of the antibody accounted for 0.5% of the total soluble proteins. The 'plantibody' (functional IgG antibody produced in plants) was easily purified by Protein A-Sepharose chromatography with a yield of approximately 35 microg/g of fresh leaf material, and its glycosylation indicated that, irrespective of the KDEL signal, the molecule is modified in both the ER and Golgi. Finally, a successful comparison of the plantibody with the ascites-derived mAb in the immunoaffinity purification of the vaccine recombinant HBsAg was performed. Taken as a whole, our results show that the large-scale production of this antibody of industrial relevance in transgenic tobacco is feasible.
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Affiliation(s)
- Nadia Ramírez
- Center for Genetic Engineering and Biotechnology, P.O. Box 6162, Havana 10600, Cuba
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