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Sutherland AR, Owens MN, Geyer CR. Modular Chimeric Antigen Receptor Systems for Universal CAR T Cell Retargeting. Int J Mol Sci 2020; 21:E7222. [PMID: 33007850 PMCID: PMC7582510 DOI: 10.3390/ijms21197222] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 09/29/2020] [Accepted: 09/29/2020] [Indexed: 12/16/2022] Open
Abstract
The engineering of T cells through expression of chimeric antigen receptors (CARs) against tumor-associated antigens (TAAs) has shown significant potential for use as an anti-cancer therapeutic. The development of strategies for flexible and modular CAR T systems is accelerating, allowing for multiple antigen targeting, precise programming, and adaptable solutions in the field of cellular immunotherapy. Moving beyond the fixed antigen specificity of traditional CAR T systems, the modular CAR T technology splits the T cell signaling domains and the targeting elements through use of a switch molecule. The activity of CAR T cells depends on the presence of the switch, offering dose-titratable response and precise control over CAR T cells. In this review, we summarize developments in universal or modular CAR T strategies that expand on current CAR T systems and open the door for more customizable T cell activity.
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Affiliation(s)
- Ashley R. Sutherland
- Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada; (A.R.S.); (M.N.O.)
| | - Madeline N. Owens
- Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada; (A.R.S.); (M.N.O.)
| | - C. Ronald Geyer
- Department of Pathology and Laboratory Medicine, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada
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Barreto K, Maruthachalam BV, Hill W, Hogan D, Sutherland AR, Kusalik A, Fonge H, DeCoteau JF, Geyer CR. Next-generation sequencing-guided identification and reconstruction of antibody CDR combinations from phage selection outputs. Nucleic Acids Res 2019; 47:e50. [PMID: 30854567 PMCID: PMC6511873 DOI: 10.1093/nar/gkz131] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 12/12/2018] [Accepted: 03/07/2019] [Indexed: 12/12/2022] Open
Abstract
Next-generation sequencing (NGS) technologies have been employed in several phage display platforms for analyzing natural and synthetic antibody sequences and for identifying and reconstructing single-chain variable fragments (scFv) and antigen-binding fragments (Fab) not found by conventional ELISA screens. In this work, we developed an NGS-assisted antibody discovery platform by integrating phage-displayed, single-framework, synthetic Fab libraries. Due to limitations in attainable read and amplicon lengths, NGS analysis of Fab libraries and selection outputs is usually restricted to either VH or VL. Since this information alone is not sufficient for high-throughput reconstruction of Fabs, we developed a rapid and simple method for linking and sequencing all diversified CDRs in phage Fab pools. Our method resulted in a reliable and straightforward platform for converting NGS information into Fab clones. We used our NGS-assisted Fab reconstruction method to recover low-frequency rare clones from phage selection outputs. While previous studies chose rare clones for rescue based on their relative frequencies in sequencing outputs, we chose rare clones for reconstruction from less-frequent CDRH3 lengths. In some cases, reconstructed rare clones (frequency ∼0.1%) showed higher affinity and better specificity than high-frequency top clones identified by Sanger sequencing, highlighting the significance of NGS-based approaches in synthetic antibody discovery.
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Affiliation(s)
- Kris Barreto
- Department of Pathology, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada
| | | | - Wayne Hill
- Department of Pathology, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada
| | - Daniel Hogan
- Department of Computer Science, University of Saskatchewan, Saskatoon, SK S7N 5C9, Canada
| | - Ashley R Sutherland
- Department of Biochemistry, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada
| | - Anthony Kusalik
- Department of Computer Science, University of Saskatchewan, Saskatoon, SK S7N 5C9, Canada
| | - Humphrey Fonge
- Department of Medical Imaging, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada
| | - John F DeCoteau
- Department of Pathology, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada
| | - C Ronald Geyer
- Department of Pathology, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada
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Sutherland AR, Alam MK, Geyer CR. Post‐translational Assembly of Protein Parts into Complex Devices by Using SpyTag/SpyCatcher Protein Ligase. Chembiochem 2018; 20:319-328. [DOI: 10.1002/cbic.201800538] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Indexed: 01/21/2023]
Affiliation(s)
- Ashley R. Sutherland
- Department of BiochemistryUniversity of Saskatchewan Saskatoon SK S7N 5E5 Canada
| | - Md. Kausar Alam
- Donnelly Centre for Cellular and Biomolecular ResearchUniversity of Toronto Toronto ON M5S3E1 Canada
| | - C. Ronald Geyer
- Department of Pathology and Laboratory MedicineUniversity of Saskatchewan Saskatoon SK S7N 5E5 Canada
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Maruthachalam BV, El-Sayed A, Liu J, Sutherland AR, Hill W, Alam MK, Pastushok L, Fonge H, Barreto K, Geyer CR. A Single-Framework Synthetic Antibody Library Containing a Combination of Canonical and Variable Complementarity-Determining Regions. Chembiochem 2017; 18:2247-2259. [DOI: 10.1002/cbic.201700279] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Indexed: 12/21/2022]
Affiliation(s)
| | - Ayman El-Sayed
- Department of Pathology; University of Saskatchewan; Saskatoon SK S7N 5E5 Canada
| | - Jianghai Liu
- Department of Pathology; University of Saskatchewan; Saskatoon SK S7N 5E5 Canada
| | - Ashley R. Sutherland
- Department of Biochemistry; University of Saskatchewan; Saskatoon SK S7N 5E5 Canada
| | - Wayne Hill
- Department of Pathology; University of Saskatchewan; Saskatoon SK S7N 5E5 Canada
| | - Md Kausar Alam
- Department of Pathology; University of Saskatchewan; Saskatoon SK S7N 5E5 Canada
| | - Landon Pastushok
- Department of Pathology; University of Saskatchewan; Saskatoon SK S7N 5E5 Canada
| | - Humphrey Fonge
- Department of Medical Imaging; University of Saskatchewan; Saskatoon SK S7N 0W8 Canada
| | - Kris Barreto
- Department of Pathology; University of Saskatchewan; Saskatoon SK S7N 5E5 Canada
| | - C. Ronald Geyer
- Department of Pathology; University of Saskatchewan; Saskatoon SK S7N 5E5 Canada
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