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Mekkaoui L, Tejerizo JG, Abreu S, Rubat L, Nikoniuk A, Macmorland W, Horlock C, Matsumoto S, Williams S, Smith K, Price J, Srivastava S, Hussain R, Banani MA, Day W, Stevenson E, Madigan M, Chen J, Khinder R, Miah S, Walker S, Ade-Onojobi M, Domining S, Sillibourne J, Sabatino M, Slepushkin V, Farzaneh F, Pule M. Efficient clinical-grade γ-retroviral vector purification by high-speed centrifugation for CAR T cell manufacturing. Mol Ther Methods Clin Dev 2022; 28:116-128. [PMID: 36620071 PMCID: PMC9808014 DOI: 10.1016/j.omtm.2022.12.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Accepted: 12/07/2022] [Indexed: 12/13/2022]
Abstract
γ-Retroviral vectors (γ-RV) are powerful tools for gene therapy applications. Current clinical vectors are produced from stable producer cell lines which require minimal further downstream processing, while purification schemes for γ-RV produced by transient transfection have not been thoroughly investigated. We aimed to develop a method to purify transiently produced γ-RV for early clinical studies. Here, we report a simple one-step purification method by high-speed centrifugation for γ-RV produced by transient transfection for clinical application. High-speed centrifugation enabled the concentration of viral titers in the range of 107-108 TU/mL with >80% overall recovery. Analysis of research-grade concentrated vector revealed sufficient reduction in product- and process-related impurities. Furthermore, product characterization of clinical-grade γ-RV by BioReliance demonstrated two-logs lower impurities per transducing unit compared with regulatory authority-approved stable producer cell line vector for clinical application. In terms of CAR T cell manufacturing, clinical-grade γ-RV produced by transient transfection and purified by high-speed centrifugation was similar to γ-RV produced from a clinical-grade stable producer cell line. This method will be of value for studies using γ-RV to bridge vector supply between early- and late-stage clinical trials.
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Affiliation(s)
- Leila Mekkaoui
- Autolus Limited, The MediaWorks, 191 Wood Lane, London W12 7FP, UK
| | - Jose G. Tejerizo
- Autolus Limited, The MediaWorks, 191 Wood Lane, London W12 7FP, UK
| | - Sara Abreu
- Autolus Limited, The MediaWorks, 191 Wood Lane, London W12 7FP, UK
| | - Lydie Rubat
- Autolus Limited, The MediaWorks, 191 Wood Lane, London W12 7FP, UK
| | | | | | - Claire Horlock
- Autolus Limited, The MediaWorks, 191 Wood Lane, London W12 7FP, UK
| | - Sofia Matsumoto
- Autolus Limited, The MediaWorks, 191 Wood Lane, London W12 7FP, UK
| | - Sarah Williams
- Autolus Limited, The MediaWorks, 191 Wood Lane, London W12 7FP, UK
| | - Koval Smith
- Autolus Limited, The MediaWorks, 191 Wood Lane, London W12 7FP, UK
| | - Juliet Price
- Autolus Limited, The MediaWorks, 191 Wood Lane, London W12 7FP, UK
| | - Saket Srivastava
- Autolus Limited, The MediaWorks, 191 Wood Lane, London W12 7FP, UK
| | - Rehan Hussain
- Autolus Limited, The MediaWorks, 191 Wood Lane, London W12 7FP, UK
| | | | - William Day
- Autolus Limited, The MediaWorks, 191 Wood Lane, London W12 7FP, UK
| | - Elena Stevenson
- Autolus Limited, The MediaWorks, 191 Wood Lane, London W12 7FP, UK
| | - Meghan Madigan
- Cell and Gene Therapy, Kings (CGT-K), King’s College London, London SE5 9NU, UK
| | - Jie Chen
- Cell and Gene Therapy, Kings (CGT-K), King’s College London, London SE5 9NU, UK
| | - Ravin Khinder
- Cell and Gene Therapy, Kings (CGT-K), King’s College London, London SE5 9NU, UK
| | - Shahed Miah
- Cell and Gene Therapy, Kings (CGT-K), King’s College London, London SE5 9NU, UK
| | - Simon Walker
- Cell and Gene Therapy, Kings (CGT-K), King’s College London, London SE5 9NU, UK
| | - Michael Ade-Onojobi
- Cell and Gene Therapy, Kings (CGT-K), King’s College London, London SE5 9NU, UK
| | - Sabine Domining
- Cell and Gene Therapy, Kings (CGT-K), King’s College London, London SE5 9NU, UK
| | | | | | | | - Farzin Farzaneh
- Cell and Gene Therapy, Kings (CGT-K), King’s College London, London SE5 9NU, UK
| | - Martin Pule
- Autolus Limited, The MediaWorks, 191 Wood Lane, London W12 7FP, UK
- Deparment of Haematology, Cancer Institute, University College London, London WC1E 6BT, UK
- Corresponding author: Martin Pule, Autolus Limited, The MediaWorks, 191 Wood Lane, London W12 7FP, UK.
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