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Fang S, Sinanan DJ, Perez MH, Cruz-Quintero RG, Jadhav SR. Development of a high-throughput scale-down model in Ambr® 250 HT for plasmid DNA fermentation processes. Biotechnol Prog 2024:e3458. [PMID: 38494959 DOI: 10.1002/btpr.3458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 02/28/2024] [Accepted: 03/06/2024] [Indexed: 03/19/2024]
Abstract
Recent advances in messenger ribonucleic acid (mRNA) vaccines and gene therapy vectors have increased the need for rapid plasmid DNA (pDNA) screening and production within the biopharmaceutical industry. High-throughput (HT) fermentor systems, such as the Ambr® 250 HT, can significantly accelerate process development timelines of pDNA upstream processes compared to traditional bench-scale glass fermentors or small-scale steam-in-place (SIP) fermentors. However, such scale-down models must be qualified to ensure that they are representative of the larger scale process similar to traditional small-scale models. In the current study, we developed a representative scale-down model of a Biostat® D-DCU 30 L pDNA fermentation process in Ambr® 250 HT fermentors using three cell lines producing three different constructs. The Ambr scale-down model provided comparable process performance and pDNA quality as the 30 L SIP fermentation process. In addition, we demonstrated the predictive value of the Ambr model by two-way qualification, first by accurately reproducing the prior trends observed in a 30 L process, followed by predicting new process trends that were then successfully reproduced in the 30 L process. The representative and predictive scale-down Ambr model developed in this study would enable a faster and more efficient approach to strain/clone/host-cell screening, pDNA process development and characterization studies, process scale-up studies, and manufacturing support.
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Affiliation(s)
- Shu Fang
- BioProcess Research & Development, Pfizer Inc., Chesterfield, Missouri, USA
| | - Dillon J Sinanan
- BioProcess Research & Development, Pfizer Inc., Chesterfield, Missouri, USA
| | - Marc H Perez
- BioProcess Research & Development, Pfizer Inc., Chesterfield, Missouri, USA
| | | | - Sachin R Jadhav
- BioProcess Research & Development, Pfizer Inc., Chesterfield, Missouri, USA
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Jaén KE, Velázquez D, Sigala JC, Lara AR. Design of a microaerobically inducible replicon for high-yield plasmid DNA production. Biotechnol Bioeng 2019; 116:2514-2525. [PMID: 31232477 DOI: 10.1002/bit.27091] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 06/07/2019] [Accepted: 06/10/2019] [Indexed: 01/11/2023]
Abstract
A pUC-derived replicon inducible by oxygen limitation was designed and tested in fed-batch cultures of Escherichia coli. It included the addition of a second inducible copy of rnaII, the positive replication control element. The rnaII gene was expressed from Ptrc and cloned into pUC18 to test the hypothesis that the ratio of the positive control molecule RNAII to the negative control element, RNAI, was the determinant of plasmid copy number per chromosome (PCN). The construct was evaluated in several E. coli strains. Evaluations of the RNAII/RNAI ratio, PCN and plasmid yield normalized to biomass (YpDNA/X ) were performed and the initial hypothesis was probed. Furthermore, in high cell-density cultures in shake flasks, an outstanding amount of 126 mg/L of plasmid was produced. The microaerobically inducible plasmid was obtained by cloning the rnaII gene under the control of the oxygen-responsive Vitreoscilla stercoraria hemoglobin promoter. For this plasmid, but not for pUC18, the RNAII/RNAI ratio, PCN and YpDNA/X efficiently increased after the shift to the microaerobic regime in fed-batch cultures in a 1 L bioreactor. The YpDNA/X of the inducible plasmid reached 12 mg/g at the end of the fed-batch but the original pUC18 only reached ca. 6 mg/g. The proposed plasmid is a valuable alternative for the operation and scale-up of plasmid DNA production processes in which mass transfer limitations will not represent an issue.
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Affiliation(s)
- Karim E Jaén
- Departamento de Procesos y Tecnología, Universidad Autónoma Metropolitana-Cuajimalpa, Mexico City, Mexico
| | - Daniela Velázquez
- Departamento de Procesos y Tecnología, Universidad Autónoma Metropolitana-Cuajimalpa, Mexico City, Mexico
| | - Juan-Carlos Sigala
- Departamento de Procesos y Tecnología, Universidad Autónoma Metropolitana-Cuajimalpa, Mexico City, Mexico
| | - Alvaro R Lara
- Departamento de Procesos y Tecnología, Universidad Autónoma Metropolitana-Cuajimalpa, Mexico City, Mexico
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Jaén KE, Velazquez D, Delvigne F, Sigala JC, Lara AR. Engineering E. coli for improved microaerobic pDNA production. Bioprocess Biosyst Eng 2019; 42:1457-1466. [PMID: 31079222 DOI: 10.1007/s00449-019-02142-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Revised: 03/20/2019] [Accepted: 05/02/2019] [Indexed: 02/08/2023]
Abstract
Escherichia coli strains W3110 and BL21 were engineered for the production of plasmid DNA (pDNA) under aerobic and transitions to microaerobic conditions. The gene coding for recombinase A (recA) was deleted in both strains. In addition, the Vitreoscilla hemoglobin (VHb) gene (vgb) was chromosomally inserted and constitutively expressed in each E. coli recA mutant and wild type. The recA inactivation increased the supercoiled pDNA fraction (SCF) in both strains, while VHb expression improved the pDNA production in W3110, but not in BL21. Therefore, a codon-optimized version of vgb was inserted in strain BL21recA-, which, together with W3110recA-vgb+, was tested in cultures with shifts from aerobic to oxygen-limited regimes. VHb expression lowered the accumulation of fermentative by-products in both strains. VHb-expressing cells displayed higher oxidative activity as indicated by the Redox Sensor Green fluorescence, which was more intense in BL21 than in W3110. Furthermore, VHb expression did not change pDNA production in W3110, but decreased it in BL21. These results are useful for understanding the physiological effects of VHb expression in two industrially relevant E. coli strains, and for the selection of a host for pDNA production.
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Affiliation(s)
- Karim E Jaén
- Posgrado en Ciencias Naturales e Ingeniería, Universidad Autónoma Metropolitana-Cuajimalpa, Vasco de Quiroga 4871, Santa Fe, 05348, Mexico City, Mexico
| | - Daniela Velazquez
- Posgrado en Ciencias Naturales e Ingeniería, Universidad Autónoma Metropolitana-Cuajimalpa, Vasco de Quiroga 4871, Santa Fe, 05348, Mexico City, Mexico
| | - Frank Delvigne
- Gembloux Agro-Bio Tech, TERRA Research and Teaching Centre, Microbial Processes and Interactions (MiPI), University of Liege, Gembloux, Belgium
| | - Juan-Carlos Sigala
- Departamento de Procesos y Tecnología, Universidad Autónoma Metropolitana-Cuajimalpa, Vasco de Quiroga 4871, Santa Fe, 05348, Mexico City, Mexico
| | - Alvaro R Lara
- Departamento de Procesos y Tecnología, Universidad Autónoma Metropolitana-Cuajimalpa, Vasco de Quiroga 4871, Santa Fe, 05348, Mexico City, Mexico.
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García-Rendón A, García-Rendón A, Guzmán R, Tejeda-Mansir A. Substrate-source flexibility of an exponential-fed perfusion process to produce plasmid DNA for use as leishmaniasis vaccine. BIOTECHNOL BIOTEC EQ 2019. [DOI: 10.1080/13102818.2018.1560232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Affiliation(s)
- Aurora García-Rendón
- Sciences and Engineering Graduate Program, University of Sonora, Hermosillo, Sonora, Mexico
| | - Angelica García-Rendón
- Department of Chemical Engineering and Metallurgy, University of Sonora, Hermosillo, Sonora, Mexico
| | - Roberto Guzmán
- Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, USA
| | - Armando Tejeda-Mansir
- Department of Scientific and Technological Research, University of Sonora, Hermosillo, Sonora, Mexico
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Vandermeulen G, Vanvarenberg K, De Beuckelaer A, De Koker S, Lambricht L, Uyttenhove C, Reschner A, Vanderplasschen A, Grooten J, Préat V. The site of administration influences both the type and the magnitude of the immune response induced by DNA vaccine electroporation. Vaccine 2015; 33:3179-85. [PMID: 25980430 DOI: 10.1016/j.vaccine.2015.05.005] [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: 11/14/2014] [Revised: 03/10/2015] [Accepted: 05/04/2015] [Indexed: 11/28/2022]
Abstract
We investigated the influence of the site of administration of DNA vaccine on the induced immune response. DNA vaccines were administered by electroporation at three different sites: tibial cranial muscle, abdominal skin and ear pinna. Aiming to draw general conclusions about DNA vaccine delivery, we successively used several plasmids encoding either luciferase and ovalbumin as models or gp160 and P1A as vaccines against HIV and P815 mastocytoma, respectively. Low levels and duration of luciferase transgene expression were observed after electroporation of the abdominal skin, partly explaining its lower immunogenic performance as compared to the other sites of administration. Analyses of OT-I CD8+ and OT-II CD4+ T cell responses highlighted the differential impact of the delivery site on the elicited immune response. Muscle electroporation induced the strongest humoral immune response and both muscle and ear pinna sites induced cellular immunity against gp160. Ear pinna delivery generated the highest level of CTL responses against P1A but electroporation of muscle and ear pinna were equally efficient in delaying P815 growth and improving mice survival. The present study demonstrated that the site of administration is a key factor to be tested in the development of DNA vaccine.
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Affiliation(s)
- Gaëlle Vandermeulen
- Université catholique de Louvain, Louvain Drug Research Institute, Advanced Drug Delivery and Biomaterials, Brussels, Belgium
| | - Kevin Vanvarenberg
- Université catholique de Louvain, Louvain Drug Research Institute, Advanced Drug Delivery and Biomaterials, Brussels, Belgium
| | - Ans De Beuckelaer
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Stefaan De Koker
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Laure Lambricht
- Université catholique de Louvain, Louvain Drug Research Institute, Advanced Drug Delivery and Biomaterials, Brussels, Belgium
| | - Catherine Uyttenhove
- Université catholique de Louvain, Ludwig Institute for Cancer Research, Brussels Branch and de Duve Institute, Brussels, Belgium
| | - Anca Reschner
- Immunology-Vaccinology, Department of Infectious and Parasitic Diseases, Fundamental and Applied Research for Animals & Health (FARAH), Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - Alain Vanderplasschen
- Immunology-Vaccinology, Department of Infectious and Parasitic Diseases, Fundamental and Applied Research for Animals & Health (FARAH), Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - Johan Grooten
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Véronique Préat
- Université catholique de Louvain, Louvain Drug Research Institute, Advanced Drug Delivery and Biomaterials, Brussels, Belgium.
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