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Wu Z, Li W, Tan M, How FYX, Sadhasivan H, Mahendran R, Wu Q, Chiong E, Le MTN. IL-12 minicircle delivery via extracellular vesicles as immunotherapy for bladder cancer. Cell Prolif 2024:e13739. [PMID: 39193804 DOI: 10.1111/cpr.13739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 07/18/2024] [Accepted: 08/15/2024] [Indexed: 08/29/2024] Open
Abstract
Interleukin-12 (IL-12) holds significant potential in cancer therapy; however, its clinical applicability is hindered by dose-limiting toxicity. Delivery of the IL-12 gene directly to tumours for constitutive IL-12 expression is a possible strategy to enhance its effectiveness while minimizing systemic toxicity. In this study, we investigate the potential of red blood cell-derived extracellular vesicles (RBCEVs) as a carrier for Il-12 plasmid delivery. We demonstrate that RBCEVs can be loaded with minicircle plasmid encoding IL-12 and delivered to MB49 bladder cancer cells for IL-12 expression. The expression of transgenes from minicircles was significantly higher than from the parental plasmids. RBCEV-mediated IL-12 expression stimulated immune responses in mouse splenocytes. Intratumoral delivery of Il-12 plasmid-loaded RBCEVs suppressed bladder cancer tumour growth, stimulated immune responses and promoted immune cell infiltration. In conclusion, our study demonstrates the promising potential of RBCEVs as an effective, safe and redosable nucleic acid drug delivery platform for IL-12.
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Affiliation(s)
- Zhiyuan Wu
- Department of Pharmacology and Institute for Digital Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Wei Li
- Department of Pharmacology and Institute for Digital Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Shanghai University of Medicine & Health Sciences, Shanghai, China
- Jiading District Central Hospital Affiliated to Shanghai University of Medicine & Health Sciences, Shanghai, China
| | - Melissa Tan
- Department of Pharmacology and Institute for Digital Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Carmine Therapeutics, Singapore, Singapore
| | - Faith Yuan Xin How
- Department of Pharmacology and Institute for Digital Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Haripriya Sadhasivan
- Department of Pharmacology and Institute for Digital Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Ratha Mahendran
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Qinghui Wu
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Department of Urology, National University Hospital, Singapore, Singapore
| | - Edmund Chiong
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Department of Urology, National University Hospital, Singapore, Singapore
| | - Minh T N Le
- Department of Pharmacology and Institute for Digital Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Institute of Molecular and Cell Therapy, A*STAR, Singapore, Singapore
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2
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Khan D, Ramachandiran I, Vasu K, China A, Khan K, Cumbo F, Halawani D, Terenzi F, Zin I, Long B, Costain G, Blaser S, Carnevale A, Gogonea V, Dutta R, Blankenberg D, Yoon G, Fox PL. Homozygous EPRS1 missense variant causing hypomyelinating leukodystrophy-15 alters variant-distal mRNA m 6A site accessibility. Nat Commun 2024; 15:4284. [PMID: 38769304 PMCID: PMC11106242 DOI: 10.1038/s41467-024-48549-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Accepted: 05/03/2024] [Indexed: 05/22/2024] Open
Abstract
Hypomyelinating leukodystrophy (HLD) is an autosomal recessive disorder characterized by defective central nervous system myelination. Exome sequencing of two siblings with severe cognitive and motor impairment and progressive hypomyelination characteristic of HLD revealed homozygosity for a missense single-nucleotide variant (SNV) in EPRS1 (c.4444 C > A; p.Pro1482Thr), encoding glutamyl-prolyl-tRNA synthetase, consistent with HLD15. Patient lymphoblastoid cell lines express markedly reduced EPRS1 protein due to dual defects in nuclear export and cytoplasmic translation of variant EPRS1 mRNA. Variant mRNA exhibits reduced METTL3 methyltransferase-mediated writing of N6-methyladenosine (m6A) and reduced reading by YTHDC1 and YTHDF1/3 required for efficient mRNA nuclear export and translation, respectively. In contrast to current models, the variant does not alter the sequence of m6A target sites, but instead reduces their accessibility for modification. The defect was rescued by antisense morpholinos predicted to expose m6A sites on target EPRS1 mRNA, or by m6A modification of the mRNA by METTL3-dCas13b, a targeted RNA methylation editor. Our bioinformatic analysis predicts widespread occurrence of SNVs associated with human health and disease that similarly alter accessibility of distal mRNA m6A sites. These results reveal a new RNA-dependent etiologic mechanism by which SNVs can influence gene expression and disease, consequently generating opportunities for personalized, RNA-based therapeutics targeting these disorders.
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Affiliation(s)
- Debjit Khan
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic, Lerner Research Institute, Cleveland, OH, USA
| | - Iyappan Ramachandiran
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic, Lerner Research Institute, Cleveland, OH, USA
| | - Kommireddy Vasu
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic, Lerner Research Institute, Cleveland, OH, USA
| | - Arnab China
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic, Lerner Research Institute, Cleveland, OH, USA
| | - Krishnendu Khan
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic, Lerner Research Institute, Cleveland, OH, USA
| | - Fabio Cumbo
- Genomic Medicine Institute, Cleveland Clinic, Lerner Research Institute, Cleveland, OH, USA
| | - Dalia Halawani
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic, Lerner Research Institute, Cleveland, OH, USA
| | - Fulvia Terenzi
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic, Lerner Research Institute, Cleveland, OH, USA
| | - Isaac Zin
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic, Lerner Research Institute, Cleveland, OH, USA
- Department of Chemistry, Cleveland State University, Cleveland, OH, USA
| | - Briana Long
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic, Lerner Research Institute, Cleveland, OH, USA
| | - Gregory Costain
- Department of Paediatrics, Division of Clinical and Metabolic Genetics, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Susan Blaser
- Department of Diagnostic Imaging, Division of Neuroradiology, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Amanda Carnevale
- Department of Paediatrics, Division of Clinical and Metabolic Genetics, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Valentin Gogonea
- Department of Chemistry, Cleveland State University, Cleveland, OH, USA
| | - Ranjan Dutta
- Department of Neuroscience, Cleveland Clinic, Lerner Research Institute, Cleveland, OH, USA
| | - Daniel Blankenberg
- Genomic Medicine Institute, Cleveland Clinic, Lerner Research Institute, Cleveland, OH, USA
| | - Grace Yoon
- Department of Paediatrics, Division of Clinical and Metabolic Genetics, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada.
- Department of Paediatrics, Division of Neurology, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada.
| | - Paul L Fox
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic, Lerner Research Institute, Cleveland, OH, USA.
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3
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Popp AP, Hettich J, Gebhardt J. Altering transcription factor binding reveals comprehensive transcriptional kinetics of a basic gene. Nucleic Acids Res 2021; 49:6249-6266. [PMID: 34060631 PMCID: PMC8216454 DOI: 10.1093/nar/gkab443] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 05/03/2021] [Accepted: 05/06/2021] [Indexed: 12/17/2022] Open
Abstract
Transcription is a vital process activated by transcription factor (TF) binding. The active gene releases a burst of transcripts before turning inactive again. While the basic course of transcription is well understood, it is unclear how binding of a TF affects the frequency, duration and size of a transcriptional burst. We systematically varied the residence time and concentration of a synthetic TF and characterized the transcription of a synthetic reporter gene by combining single molecule imaging, single molecule RNA-FISH, live transcript visualisation and analysis with a novel algorithm, Burst Inference from mRNA Distributions (BIRD). For this well-defined system, we found that TF binding solely affected burst frequency and variations in TF residence time had a stronger influence than variations in concentration. This enabled us to device a model of gene transcription, in which TF binding triggers multiple successive steps before the gene transits to the active state and actual mRNA synthesis is decoupled from TF presence. We quantified all transition times of the TF and the gene, including the TF search time and the delay between TF binding and the onset of transcription. Our quantitative measurements and analysis revealed detailed kinetic insight, which may serve as basis for a bottom-up understanding of gene regulation.
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Affiliation(s)
- Achim P Popp
- Institute of Biophysics, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Johannes Hettich
- Institute of Biophysics, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - J Christof M Gebhardt
- Institute of Biophysics, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
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4
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Korn J, Schäckermann D, Kirmann T, Bertoglio F, Steinke S, Heisig J, Ruschig M, Rojas G, Langreder N, Wenzel EV, Roth KDR, Becker M, Meier D, van den Heuvel J, Hust M, Dübel S, Schubert M. Baculovirus-free insect cell expression system for high yield antibody and antigen production. Sci Rep 2020; 10:21393. [PMID: 33288836 PMCID: PMC7721901 DOI: 10.1038/s41598-020-78425-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 11/20/2020] [Indexed: 11/09/2022] Open
Abstract
Antibodies are essential tools for therapy and diagnostics. Yet, production remains expensive as it is mostly done in mammalian expression systems. As most therapeutic IgG require mammalian glycosylation to interact with the human immune system, other expression systems are rarely used for production. However, for neutralizing antibodies that are not required to activate the human immune system as well as antibodies used in diagnostics, a cheaper production system would be advantageous. In our study, we show cost-efficient, easy and high yield production of antibodies as well as various secreted antigens including Interleukins and SARS-CoV-2 related proteins in a baculovirus-free insect cell expression system. To improve yields, we optimized the expression vector, media and feeding strategies. In addition, we showed the feasibility of lyophilization of the insect cell produced antibodies. Furthermore, stability and activity of the antibodies was compared to antibodies produced by Expi293F cells revealing a lower aggregation of antibodies originating from High Five cell production. Finally, the newly established High Five expression system was compared to the Expi293F mammalian expression system in regard of yield and costs. Most interestingly, all tested proteins were producible in our High Five cell expression system what was not the case in the Expi293F system, hinting that the High Five cell system is especially suited to produce difficult-to-express target proteins.
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Affiliation(s)
- Janin Korn
- Department of Biotechnology, Technische Universität Braunschweig, Spielmannstraße 7, 38106, Braunschweig, Germany
| | - Dorina Schäckermann
- Department of Biotechnology, Technische Universität Braunschweig, Spielmannstraße 7, 38106, Braunschweig, Germany
| | - Toni Kirmann
- Department of Biotechnology, Technische Universität Braunschweig, Spielmannstraße 7, 38106, Braunschweig, Germany
- Medical Faculty, Carl Ludwig Institute for Physiology, Universität Leipzig, Liebigstraße 27, 04103, Leipzig, Germany
| | - Federico Bertoglio
- Department of Biotechnology, Technische Universität Braunschweig, Spielmannstraße 7, 38106, Braunschweig, Germany
| | - Stephan Steinke
- Department of Biotechnology, Technische Universität Braunschweig, Spielmannstraße 7, 38106, Braunschweig, Germany
| | - Janyn Heisig
- Department of Biotechnology, Technische Universität Braunschweig, Spielmannstraße 7, 38106, Braunschweig, Germany
- Department Vaccinology and Applied Microbiology, Helmholtz Centre for Infection Research, Inhoffenstraße 7, 38124, Braunschweig, Germany
| | - Maximilian Ruschig
- Department of Biotechnology, Technische Universität Braunschweig, Spielmannstraße 7, 38106, Braunschweig, Germany
| | - Gertrudis Rojas
- Center of Molecular Immunology, PO Box 16040, 11300, Havana, Cuba
| | - Nora Langreder
- Department of Biotechnology, Technische Universität Braunschweig, Spielmannstraße 7, 38106, Braunschweig, Germany
| | - Esther Veronika Wenzel
- Department of Biotechnology, Technische Universität Braunschweig, Spielmannstraße 7, 38106, Braunschweig, Germany
| | - Kristian Daniel Ralph Roth
- Department of Biotechnology, Technische Universität Braunschweig, Spielmannstraße 7, 38106, Braunschweig, Germany
| | - Marlies Becker
- Department of Biotechnology, Technische Universität Braunschweig, Spielmannstraße 7, 38106, Braunschweig, Germany
| | - Doris Meier
- Department of Biotechnology, Technische Universität Braunschweig, Spielmannstraße 7, 38106, Braunschweig, Germany
| | - Joop van den Heuvel
- Department Structure and Function of Proteins, Helmholtz-Centre for Infection Research, Inhoffenstraße 7, 38124, Braunschweig, Germany
| | - Michael Hust
- Department of Biotechnology, Technische Universität Braunschweig, Spielmannstraße 7, 38106, Braunschweig, Germany
| | - Stefan Dübel
- Department of Biotechnology, Technische Universität Braunschweig, Spielmannstraße 7, 38106, Braunschweig, Germany
| | - Maren Schubert
- Department of Biotechnology, Technische Universität Braunschweig, Spielmannstraße 7, 38106, Braunschweig, Germany.
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Application of next generation sequencing technology on contamination monitoring in microbiology laboratory. BIOSAFETY AND HEALTH 2019; 1:25-31. [PMID: 32501441 PMCID: PMC7148601 DOI: 10.1016/j.bsheal.2019.02.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 01/07/2019] [Accepted: 02/21/2019] [Indexed: 12/25/2022] Open
Abstract
The surveillance and prevention of pathogenic microbiological contamination are the most important tasks of biosafety management in the lab. There is an urgent need to establish an effective and unbiased method to evaluate and monitor such contamination. This study aims to investigate the utility of next generation sequencing (NGS) method to detect possible contamination in the microbiology laboratory. Environmental samples were taken at multiple sites at the lab including the inner site of centrifuge rotor, the bench used for molecular biological tests, the benches of biosafety cabinets used for viral culture, clinical sample pre-treatment and nucleic acids extraction, by scrubbing the sites using sterile flocked swabs. The extracted total nucleic acids were used to construct the libraries for deep sequencing according to the protocol of Ion Torrent platform. At least 1G raw data was obtained for each sample. The reads of viruses and bacteria accounted for 0.01 ± 0.02%, and 77.76 ± 12.53% of total reads respectively. The viral sequences were likely to be derived from gene amplification products, the nucleic acids contaminated in fetal bovine serum. Reads from environmental microorganisms were also identified. Our results suggested that NGS method was capable of monitoring the nucleic acids contaminations from different sources in the lab, demonstrating its promising utility in monitoring and assessing the risk of potential laboratory contamination. The risk of contamination from reagents, remnant DNA and environment should be considered in data analysis and results interpretation.
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Shang H, Garretson TA, Kumar CS, Dieter RF, Cheng XW. Improved pFastBac™ donor plasmid vectors for higher protein production using the Bac-to-Bac® baculovirus expression vector system. J Biotechnol 2017. [DOI: 10.1016/j.jbiotec.2017.06.397] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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