1
|
Stranford DM, Simons LM, Berman KE, Cheng L, DiBiase BN, Hung ME, Lucks JB, Hultquist JF, Leonard JN. Genetically encoding multiple functionalities into extracellular vesicles for the targeted delivery of biologics to T cells. Nat Biomed Eng 2024; 8:397-414. [PMID: 38012307 PMCID: PMC11088532 DOI: 10.1038/s41551-023-01142-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 10/20/2023] [Indexed: 11/29/2023]
Abstract
The genetic modification of T cells has advanced cellular immunotherapies, yet the delivery of biologics specifically to T cells remains challenging. Here we report a suite of methods for the genetic engineering of cells to produce extracellular vesicles (EVs)-which naturally encapsulate and transfer proteins and nucleic acids between cells-for the targeted delivery of biologics to T cells without the need for chemical modifications. Specifically, the engineered cells secreted EVs that actively loaded protein cargo via a protein tag and that displayed high-affinity T-cell-targeting domains and fusogenic glycoproteins. We validated the methods by engineering EVs that delivered Cas9-single-guide-RNA complexes to ablate the gene encoding the C-X-C chemokine co-receptor type 4 in primary human CD4+ T cells. The strategy is amenable to the targeted delivery of biologics to other cell types.
Collapse
Affiliation(s)
- Devin M Stranford
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL, USA
- Center for Synthetic Biology, Northwestern University, Evanston, IL, USA
| | - Lacy M Simons
- Department of Medicine, Division of Infectious Diseases, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Center for Pathogen Genomics and Microbial Evolution, Northwestern University Havey Institute for Global Health, Chicago, IL, USA
| | - Katherine E Berman
- Center for Synthetic Biology, Northwestern University, Evanston, IL, USA
- Interdisciplinary Biological Sciences Training Program, Northwestern University, Evanston, IL, USA
| | - Luyi Cheng
- Center for Synthetic Biology, Northwestern University, Evanston, IL, USA
- Interdisciplinary Biological Sciences Training Program, Northwestern University, Evanston, IL, USA
| | - Beth N DiBiase
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL, USA
- Center for Synthetic Biology, Northwestern University, Evanston, IL, USA
| | - Michelle E Hung
- Center for Synthetic Biology, Northwestern University, Evanston, IL, USA
- Interdisciplinary Biological Sciences Training Program, Northwestern University, Evanston, IL, USA
| | - Julius B Lucks
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL, USA
- Center for Synthetic Biology, Northwestern University, Evanston, IL, USA
- Interdisciplinary Biological Sciences Training Program, Northwestern University, Evanston, IL, USA
- Chemistry of Life Processes Institute, Northwestern University, Evanston, IL, USA
| | - Judd F Hultquist
- Department of Medicine, Division of Infectious Diseases, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Center for Pathogen Genomics and Microbial Evolution, Northwestern University Havey Institute for Global Health, Chicago, IL, USA
| | - Joshua N Leonard
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL, USA.
- Center for Synthetic Biology, Northwestern University, Evanston, IL, USA.
- Interdisciplinary Biological Sciences Training Program, Northwestern University, Evanston, IL, USA.
- Chemistry of Life Processes Institute, Northwestern University, Evanston, IL, USA.
- Member, Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Evanston, IL, USA.
| |
Collapse
|
2
|
Vamva E, Ozog S, Leaman DP, Yu-Hong Cheng R, Irons NJ, Ott A, Stoffers C, Khan I, Goebrecht GK, Gardner MR, Farzan M, Rawlings DJ, Zwick MB, James RG, Torbett BE. A lentiviral vector B cell gene therapy platform for the delivery of the anti-HIV-1 eCD4-Ig-knob-in-hole-reversed immunoadhesin. Mol Ther Methods Clin Dev 2023; 28:366-384. [PMID: 36879849 PMCID: PMC9984920 DOI: 10.1016/j.omtm.2023.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 02/08/2023] [Indexed: 02/12/2023]
Abstract
Barriers to effective gene therapy for many diseases include the number of modified target cells required to achieve therapeutic outcomes and host immune responses to expressed therapeutic proteins. As long-lived cells specialized for protein secretion, antibody-secreting B cells are an attractive target for foreign protein expression in blood and tissue. To neutralize HIV-1, we developed a lentiviral vector (LV) gene therapy platform for delivery of the anti-HIV-1 immunoadhesin, eCD4-Ig, to B cells. The EμB29 enhancer/promoter in the LV limited gene expression in non-B cell lineages. By engineering a knob-in-hole-reversed (KiHR) modification in the CH3-Fc eCD4-Ig domain, we reduced interactions between eCD4-Ig and endogenous B cell immunoglobulin G proteins, which improved HIV-1 neutralization potency. Unlike previous approaches in non-lymphoid cells, eCD4-Ig-KiHR produced in B cells promoted HIV-1 neutralizing protection without requiring exogenous TPST2, a tyrosine sulfation enzyme required for eCD4-Ig-KiHR function. This finding indicated that B cell machinery is well suited to produce therapeutic proteins. Lastly, to overcome the inefficient transduction efficiency associated with VSV-G LV delivery to primary B cells, an optimized measles pseudotyped LV packaging methodology achieved up to 75% transduction efficiency. Overall, our findings support the utility of B cell gene therapy platforms for therapeutic protein delivery.
Collapse
Affiliation(s)
- Eirini Vamva
- Center for Immunity and Immunotherapies, Seattle Children’s Research Institute, Seattle, WA, USA
| | - Stosh Ozog
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, USA
- Department of Pediatrics, University of Washington School of Medicine, Seattle, WA, USA
| | - Daniel P. Leaman
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, USA
| | - Rene Yu-Hong Cheng
- Center for Immunity and Immunotherapies, Seattle Children’s Research Institute, Seattle, WA, USA
| | - Nicholas J. Irons
- Department of Statistics, University of Washington, Seattle, WA, USA
| | - Andee Ott
- Center for Immunity and Immunotherapies, Seattle Children’s Research Institute, Seattle, WA, USA
| | - Claire Stoffers
- Center for Immunity and Immunotherapies, Seattle Children’s Research Institute, Seattle, WA, USA
| | - Iram Khan
- Center for Immunity and Immunotherapies, Seattle Children’s Research Institute, Seattle, WA, USA
| | | | - Matthew R. Gardner
- Department of Infectious Diseases, The Scripps Research Institute, Jupiter, FL, USA
| | - Michael Farzan
- Department of Infectious Diseases, The Scripps Research Institute, Jupiter, FL, USA
| | - David J. Rawlings
- Center for Immunity and Immunotherapies, Seattle Children’s Research Institute, Seattle, WA, USA
- Department of Pediatrics, University of Washington School of Medicine, Seattle, WA, USA
- Department of Immunology, University of Washington School of Medicine, Seattle, WA, USA
| | - Michael B. Zwick
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, USA
| | - Richard G. James
- Center for Immunity and Immunotherapies, Seattle Children’s Research Institute, Seattle, WA, USA
- Department of Pediatrics, University of Washington School of Medicine, Seattle, WA, USA
- Department of Pharmacology, University of Washington School of Medicine, Seattle, WA, USA
| | - Bruce E. Torbett
- Center for Immunity and Immunotherapies, Seattle Children’s Research Institute, Seattle, WA, USA
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, USA
- Department of Pediatrics, University of Washington School of Medicine, Seattle, WA, USA
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, USA
- Institute for Stem Cell and Regenerative Medicine, Seattle, WA, USA
| |
Collapse
|
3
|
Edelstein J, Fritz M, Lai SK. Challenges and opportunities in gene editing of B cells. Biochem Pharmacol 2022; 206:115285. [PMID: 36241097 DOI: 10.1016/j.bcp.2022.115285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 09/28/2022] [Accepted: 09/30/2022] [Indexed: 01/29/2023]
Abstract
B cells have long been an underutilized target in immune cell engineering, despite a number of unique attributes that could address longstanding challenges in medicine. Notably, B cells evolved to secrete large quantities of antibodies for prolonged periods, making them suitable platforms for long-term protein delivery. Recent advances in gene editing technologies, such as CRISPR-Cas, have improved the precision and efficiency of engineering and expanded potential applications of engineered B cells. While most work on B cell editing has focused on ex vivo modification, a body of recent work has also advanced the possibility of in vivo editing applications. In this review, we will discuss both past and current approaches to B cell engineering, and its promising applications in immunology research and therapeutic gene editing.
Collapse
Affiliation(s)
- Jasmine Edelstein
- Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC, USA
| | - Marshall Fritz
- Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC, USA
| | - Samuel K Lai
- Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC, USA; Department of Biomedical Engineering, University of North Carolina, Chapel Hill, NC, USA; Department of Immunology and Microbiology, University of North Carolina, Chapel Hill, NC, USA.
| |
Collapse
|
4
|
New p35 (H3L) Epitope Involved in Vaccinia Virus Neutralization and Its Deimmunization. Viruses 2022; 14:v14061224. [PMID: 35746695 PMCID: PMC9227246 DOI: 10.3390/v14061224] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 06/02/2022] [Accepted: 06/03/2022] [Indexed: 01/07/2023] Open
Abstract
Vaccinia virus (VACV) is a promising oncolytic agent because it exhibits many characteristic features of an oncolytic virus. However, its effectiveness is limited by the strong antiviral immune response induced by this virus. One possible approach to overcome this limitation is to develop deimmunized recombinant VACV. It is known that VACV p35 is a major protein for B- and T-cell immune response. Despite the relevance of p35, its epitope structure remains insufficiently studied. To determine neutralizing epitopes, a panel of recombinant p35 variants was designed, expressed, and used for mice immunization. Plaque-reduction neutralization tests demonstrated that VACV was only neutralized by sera from mice that were immunized with variants containing both N- and C- terminal regions of p35. This result was confirmed by the depletion of anti-p35 mice sera with recombinant p35 variants. At least nine amino acid residues affecting the immunogenic profile of p35 were identified. Substitutions of seven residues led to disruption of B-cell epitopes, whereas substitutions of two residues resulted in the recognition of the mutant p35 solely by non-neutralizing antibodies.
Collapse
|
5
|
Deng L, Liang P, Cui H. Pseudotyped lentiviral vectors: Ready for translation into targeted cancer gene therapy? Genes Dis 2022. [PMID: 37492721 PMCID: PMC10363566 DOI: 10.1016/j.gendis.2022.03.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Gene therapy holds great promise for curing cancer by editing the deleterious genes of tumor cells, but the lack of vector systems for efficient delivery of genetic material into specific tumor sites in vivo has limited its full therapeutic potential in cancer gene therapy. Over the past two decades, increasing studies have shown that lentiviral vectors (LVs) modified with different glycoproteins from a donating virus, a process referred to as pseudotyping, have altered tropism and display cell-type specificity in transduction, leading to selective tumor cell killing. This feature of LVs together with their ability to enable high efficient gene delivery in dividing and non-dividing mammalian cells in vivo make them to be attractive tools in future cancer gene therapy. This review is intended to summarize the status quo of some typical pseudotypings of LVs and their applications in basic anti-cancer studies across many malignancies. The opportunities of translating pseudotyped LVs into clinic use in cancer therapy have also been discussed.
Collapse
|
6
|
Vamva E, Ozog S, Verhoeyen E, James RG, Rawlings DJ, Torbett BE. An optimized measles virus glycoprotein-pseudotyped lentiviral vector production system to promote efficient transduction of human primary B cells. STAR Protoc 2022; 3:101228. [PMID: 35284833 PMCID: PMC8914380 DOI: 10.1016/j.xpro.2022.101228] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Measles virus envelope pseudotyped LV (MV-LV) can achieve high B cell transduction rates (up to 50%), but suffers from low titers. To overcome current limitations, we developed an optimized MV-LV production protocol that achieved consistent B cell transduction efficiency up to 75%. We detail this protocol along with analytical assays to assess the results of MV-LV mediated B cell transduction, including flow cytometry for B cell phenotypic characterization and measurement of transduction efficiency, and ddPCR for VCN analysis.
Collapse
Affiliation(s)
- Eirini Vamva
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, USA
- Center for Immunity and Immunotherapies, Seattle Children’s Research Institute, Seattle, WA, USA
- Department of Pediatrics, University of Washington School of Medicine, Seattle, WA, USA
| | - Stosh Ozog
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, USA
- Department of Pediatrics, University of Washington School of Medicine, Seattle, WA, USA
| | - Els Verhoeyen
- CIRI–International Center for Infectiology Research, Team EVIR, Université de Lyon, Lyon, France
| | - Richard G. James
- Center for Immunity and Immunotherapies, Seattle Children’s Research Institute, Seattle, WA, USA
- Department of Pediatrics, University of Washington School of Medicine, Seattle, WA, USA
| | - David J. Rawlings
- Center for Immunity and Immunotherapies, Seattle Children’s Research Institute, Seattle, WA, USA
- Department of Pediatrics, University of Washington School of Medicine, Seattle, WA, USA
| | - Bruce E. Torbett
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, USA
- Center for Immunity and Immunotherapies, Seattle Children’s Research Institute, Seattle, WA, USA
- Department of Pediatrics, University of Washington School of Medicine, Seattle, WA, USA
- Institute for Stem Cell and Regenerative Medicine, Seattle, WA, USA
| |
Collapse
|
7
|
Ruggiero E, Carnevale E, Prodeus A, Magnani ZI, Camisa B, Merelli I, Politano C, Stasi L, Potenza A, Cianciotti BC, Manfredi F, Di Bono M, Vago L, Tassara M, Mastaglio S, Ponzoni M, Sanvito F, Liu D, Balwani I, Galli R, Genua M, Ostuni R, Doglio M, O'Connell D, Dutta I, Yazinski SA, McKee M, Arredouani MS, Schultes B, Ciceri F, Bonini C. CRISPR-based gene disruption and integration of high-avidity, WT1-specific T cell receptors improve antitumor T cell function. Sci Transl Med 2022; 14:eabg8027. [PMID: 35138911 DOI: 10.1126/scitranslmed.abg8027] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
T cell receptor (TCR)-based therapy has the potential to induce durable clinical responses in patients with cancer by targeting intracellular tumor antigens with high sensitivity and by promoting T cell survival. However, the need for TCRs specific for shared oncogenic antigens and the need for manufacturing protocols able to redirect T cell specificity while preserving T cell fitness remain limiting factors. By longitudinal monitoring of T cell functionality and dynamics in 15 healthy donors, we isolated 19 TCRs specific for Wilms' tumor antigen 1 (WT1), which is overexpressed by several tumor types. TCRs recognized several peptides restricted by common human leukocyte antigen (HLA) alleles and displayed a wide range of functional avidities. We selected five high-avidity HLA-A*02:01-restricted TCRs, three that were specific to the less explored immunodominant WT137-45 and two that were specific to the noncanonical WT1-78-64 epitopes, both naturally processed by primary acute myeloid leukemia (AML) blasts. With CRISPR-Cas9 genome editing tools, we combined TCR-targeted integration into the TCR α constant (TRAC) locus with TCR β constant (TRBC) knockout, thus avoiding TCRαβ mispairing and maximizing TCR expression and function. The engineered lymphocytes were enriched in memory stem T cells. A unique WT137-45-specific TCR showed antigen-specific responses and efficiently killed AML blasts, acute lymphoblastic leukemia blasts, and glioblastoma cells in vitro and in vivo in the absence of off-tumor toxicity. T cells engineered to express this receptor are being advanced into clinical development for AML immunotherapy and represent a candidate therapy for other WT1-expressing tumors.
Collapse
Affiliation(s)
- Eliana Ruggiero
- Experimental Hematology Unit, Division of Immunology, Transplantation and Infectious Diseases, Ospedale San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Erica Carnevale
- Experimental Hematology Unit, Division of Immunology, Transplantation and Infectious Diseases, Ospedale San Raffaele Scientific Institute, 20132 Milan, Italy
| | | | - Zulma Irene Magnani
- Experimental Hematology Unit, Division of Immunology, Transplantation and Infectious Diseases, Ospedale San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Barbara Camisa
- Experimental Hematology Unit, Division of Immunology, Transplantation and Infectious Diseases, Ospedale San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Ivan Merelli
- San Raffaele Telethon Institute for Gene Therapy (SR-TIGET), Ospedale San Raffaele Scientific Institute, 20132 Milan, Italy.,National Research Council, Institute for Biomedical Technologies, Segrate, Italy
| | - Claudia Politano
- Experimental Hematology Unit, Division of Immunology, Transplantation and Infectious Diseases, Ospedale San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Lorena Stasi
- Experimental Hematology Unit, Division of Immunology, Transplantation and Infectious Diseases, Ospedale San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Alessia Potenza
- Experimental Hematology Unit, Division of Immunology, Transplantation and Infectious Diseases, Ospedale San Raffaele Scientific Institute, 20132 Milan, Italy.,School of Medicine and Surgery, Milano-Bicocca University, 20126 Milan, Italy
| | - Beatrice Claudia Cianciotti
- Experimental Hematology Unit, Division of Immunology, Transplantation and Infectious Diseases, Ospedale San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Francesco Manfredi
- Experimental Hematology Unit, Division of Immunology, Transplantation and Infectious Diseases, Ospedale San Raffaele Scientific Institute, 20132 Milan, Italy.,Vita-Salute San Raffaele University, 20132 Milan, Italy
| | - Mattia Di Bono
- Experimental Hematology Unit, Division of Immunology, Transplantation and Infectious Diseases, Ospedale San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Luca Vago
- Immunogenetics, Leukemia Genomics and Immunobiology Unit, Division of Immunology, Transplantation and Infectious Diseases, Ospedale San Raffaele Scientific Institute, 20132 Milan, Italy.,Hematology and Bone Marrow Transplantation Unit, Ospedale San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Michela Tassara
- Immunohematology and Transfusion Medicine Unit, Ospedale San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Sara Mastaglio
- Hematology and Bone Marrow Transplantation Unit, Ospedale San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Maurilio Ponzoni
- Vita-Salute San Raffaele University, 20132 Milan, Italy.,Pathology Unit, Ospedale San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Francesca Sanvito
- Pathology Unit, Ospedale San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Dai Liu
- Intellia Therapeutics, Cambridge, MA 02139, USA
| | | | - Rossella Galli
- Neural Stem Cell Biology Unit, Division of Neurosciences, Ospedale San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Marco Genua
- Genomics of the Innate Immune System Unit, San Raffaele Telethon Institute for Gene Therapy (SR-Tiget), Ospedale San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Renato Ostuni
- Vita-Salute San Raffaele University, 20132 Milan, Italy.,Genomics of the Innate Immune System Unit, San Raffaele Telethon Institute for Gene Therapy (SR-Tiget), Ospedale San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Matteo Doglio
- Experimental Hematology Unit, Division of Immunology, Transplantation and Infectious Diseases, Ospedale San Raffaele Scientific Institute, 20132 Milan, Italy
| | | | - Ivy Dutta
- Intellia Therapeutics, Cambridge, MA 02139, USA
| | | | - Mark McKee
- Intellia Therapeutics, Cambridge, MA 02139, USA
| | | | | | - Fabio Ciceri
- Vita-Salute San Raffaele University, 20132 Milan, Italy.,Hematology and Bone Marrow Transplantation Unit, Ospedale San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Chiara Bonini
- Experimental Hematology Unit, Division of Immunology, Transplantation and Infectious Diseases, Ospedale San Raffaele Scientific Institute, 20132 Milan, Italy.,Vita-Salute San Raffaele University, 20132 Milan, Italy
| |
Collapse
|
8
|
Takushi SE, Paik NY, Fedanov A, Prince C, Doering CB, Spencer HT, Chandrakasan S. Lentiviral Gene Therapy for Familial Hemophagocytic Lymphohistiocytosis Type 3, Caused by UNC13D Genetic Defects. Hum Gene Ther 2021; 31:626-638. [PMID: 32253931 DOI: 10.1089/hum.2019.329] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Familial hemophagocytic lymphohistiocytosis type 3 (FHL3) is a rare disease caused by mutations to the UNC13D gene and the subsequent absence or decreased activity of the Munc13-4 protein. Munc13-4 is essential for the exocytosis of perforin and granzyme containing granules from cytotoxic cells. Without it, these cells are able to recognize an immunological insult but are unable to execute their cytotoxic functions. The result is a hyperinflammatory state that, if left untreated, is fatal. At present, the only curative treatment is hematopoietic stem cell transplantation (HSCT), but eligibility and response to this treatment are largely dependent on the ability to control inflammation before HSCT. In this study, we describe an optimized lentiviral vector that can restore Munc13-4 expression and degranulation capacity in both transduced FHL3 patient T cells and transduced hematopoietic stem cells from the FHL3 (Jinx) disease model.
Collapse
Affiliation(s)
- Sarah E Takushi
- Department of Immunology and Molecular Pathogenesis, Graduate Division of Biological and Biomedical Sciences, Laney Graduate School, Emory University, Atlanta, Georgia, USA.,Cell and Gene Therapy Program, Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta, Atlanta, Georgia, USA.,Department of Pediatrics, Emory University, Atlanta, Georgia, USA
| | - Na Yoon Paik
- Cell and Gene Therapy Program, Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta, Atlanta, Georgia, USA.,Department of Pediatrics, Emory University, Atlanta, Georgia, USA
| | - Andrew Fedanov
- Cell and Gene Therapy Program, Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta, Atlanta, Georgia, USA.,Department of Pediatrics, Emory University, Atlanta, Georgia, USA
| | - Chengyu Prince
- Cell and Gene Therapy Program, Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta, Atlanta, Georgia, USA.,Department of Pediatrics, Emory University, Atlanta, Georgia, USA
| | - Christopher B Doering
- Cell and Gene Therapy Program, Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta, Atlanta, Georgia, USA.,Department of Pediatrics, Emory University, Atlanta, Georgia, USA.,Department of Molecular and Systems Pharmacology, Graduate Division of Biological and Biomedical Sciences, Emory University School of Medicine, Atlanta, Georgia, USA
| | - H Trent Spencer
- Cell and Gene Therapy Program, Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta, Atlanta, Georgia, USA.,Department of Pediatrics, Emory University, Atlanta, Georgia, USA.,Department of Molecular and Systems Pharmacology, Graduate Division of Biological and Biomedical Sciences, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Shanmuganathan Chandrakasan
- Cell and Gene Therapy Program, Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta, Atlanta, Georgia, USA.,Department of Pediatrics, Emory University, Atlanta, Georgia, USA.,Bone Marrow Transplant Program, Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta, Atlanta, Georgia, USA
| |
Collapse
|
9
|
Toon K, Bentley EM, Mattiuzzo G. More Than Just Gene Therapy Vectors: Lentiviral Vector Pseudotypes for Serological Investigation. Viruses 2021; 13:217. [PMID: 33572589 PMCID: PMC7911487 DOI: 10.3390/v13020217] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 01/22/2021] [Accepted: 01/26/2021] [Indexed: 12/13/2022] Open
Abstract
Serological assays detecting neutralising antibodies are important for determining the immune responses following infection or vaccination and are also often considered a correlate of protection. The target of neutralising antibodies is usually located in the Envelope protein on the viral surface, which mediates cell entry. As such, presentation of the Envelope protein on a lentiviral particle represents a convenient alternative to handling of a potentially high containment virus or for those viruses with no established cell culture system. The flexibility, relative safety and, in most cases, ease of production of lentiviral pseudotypes, have led to their use in serological assays for many applications such as the evaluation of candidate vaccines, screening and characterization of anti-viral therapeutics, and sero-surveillance. Above all, the speed of production of the lentiviral pseudotypes, once the envelope sequence is published, makes them important tools in the response to viral outbreaks, as shown during the COVID-19 pandemic in 2020. In this review, we provide an overview of the landscape of the serological applications of pseudotyped lentiviral vectors, with a brief discussion on their production and batch quality analysis. Finally, we evaluate their role as surrogates for the real virus and possible alternatives.
Collapse
Affiliation(s)
- Kamilla Toon
- Division of Virology, National Institute for Biological Standards and Control-MHRA, Blanche Lane, South Mimms EN6 3QG, UK;
- Division of Infection and Immunity, University College London, London WC1E 6BT, UK
| | - Emma M. Bentley
- Division of Virology, National Institute for Biological Standards and Control-MHRA, Blanche Lane, South Mimms EN6 3QG, UK;
| | - Giada Mattiuzzo
- Division of Virology, National Institute for Biological Standards and Control-MHRA, Blanche Lane, South Mimms EN6 3QG, UK;
| |
Collapse
|
10
|
Cannon P, Asokan A, Czechowicz A, Hammond P, Kohn DB, Lieber A, Malik P, Marks P, Porteus M, Verhoeyen E, Weissman D, Weissman I, Kiem HP. Safe and Effective In Vivo Targeting and Gene Editing in Hematopoietic Stem Cells: Strategies for Accelerating Development. Hum Gene Ther 2021; 32:31-42. [PMID: 33427035 DOI: 10.1089/hum.2020.263] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
On May 11, 2020, the National Institutes of Health (NIH) and the Bill & Melinda Gates Foundation (Gates Foundation) held an exploratory expert scientific roundtable to inform an NIH-Gates Foundation collaboration on the development of scalable, sustainable, and accessible HIV and sickle cell disease (SCD) therapies based on in vivo gene editing of hematopoietic stem cells (HSCs). A particular emphasis was on how such therapies could be developed for low-resource settings in sub-Saharan Africa. Paula Cannon, PhD, of the University of Southern California and Hans-Peter Kiem, MD, PhD, of the Fred Hutchinson Cancer Research Center served as roundtable cochairs. Welcoming remarks were provided by the leadership of NIH, NHLBI, and BMGF, who cited the importance of assessing the state of the science and charting a path toward finding safe, effective, and durable gene-based therapies for HIV and SCD. These remarks were followed by three sessions in which participants heard presentations on and discussed the therapeutic potential of modified HSCs, leveraging HSC biology and differentiation, and in vivo HSC targeting approaches. This roundtable serves as the beginning of an ongoing discussion among NIH, the Gates Foundation, research and patient communities, and the public at large. As this collaboration progresses, these communities will be engaged as we collectively navigate the complex scientific and ethical issues surrounding in vivo HSC targeting and editing. Summarized excerpts from each of the presentations are given hereunder, reflecting the individual views and perspectives of each presenter.
Collapse
Affiliation(s)
- Paula Cannon
- Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Aravind Asokan
- Department of Surgery, Duke University School of Medicine, Durham, North Carolina, USA
| | | | - Paula Hammond
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Donald B Kohn
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, Los Angeles, California, USA
| | - Andre Lieber
- Department of Medicine, University of Washington, Seattle, Washington, USA
| | - Punam Malik
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio, USA
| | - Peter Marks
- U.S. Food and Drug Administration, Silver Spring, Maryland, USA
| | | | - Els Verhoeyen
- CIRI, Université de Lyon, INSERM, CNRS, ENS de Lyon, Lyon, France.,Université de Nice, Nice, France
| | - Drew Weissman
- Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Irving Weissman
- Stanford Institute for Stem Cell Biology and Regenerative Medicine; Stanford University School of Medicine, Stanford, California, USA
| | - Hans-Peter Kiem
- Stem Cell and Gene Therapy Program, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
| |
Collapse
|
11
|
Song K, Viskovska M. Design and Engineering of Deimmunized Vaccinia Viral Vectors. Biomedicines 2020; 8:E491. [PMID: 33187060 PMCID: PMC7697509 DOI: 10.3390/biomedicines8110491] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 11/08/2020] [Accepted: 11/09/2020] [Indexed: 12/31/2022] Open
Abstract
Vaccinia viral (VV) vectors are increasingly used in oncolytic virus therapy and vaccine development for cancer and infectious diseases. However, their effectiveness is hindered by the strong anti-viral immune response induced by the viral vector. In this review, we discuss the strategies to deimmunize vaccinia viral vector. One approach is to mask the virus from the neutralization antibody responses by mapping and eliminating of B-cell epitopes on the viral membrane proteins. The recombinant VVs contain one or more viral glycoproteins with mutations in the neutralizing antibody epitopes, resulting in viral escape from neutralization. In addition, a regulator of complement activation (e.g., CD55) can be expressed on the surface of the virus particle, leading to increased resistance to complement-mediated neutralization.
Collapse
Affiliation(s)
| | - Mariya Viskovska
- Icell Kealex Therapeutics, 2450 Holcombe Blvd Suite J, JALBS@TMC, Houston, TX 77021, USA;
| |
Collapse
|
12
|
Gutierrez-Guerrero A, Cosset FL, Verhoeyen E. Lentiviral Vector Pseudotypes: Precious Tools to Improve Gene Modification of Hematopoietic Cells for Research and Gene Therapy. Viruses 2020; 12:v12091016. [PMID: 32933033 PMCID: PMC7551254 DOI: 10.3390/v12091016] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 09/02/2020] [Accepted: 09/07/2020] [Indexed: 12/20/2022] Open
Abstract
Viruses have been repurposed into tools for gene delivery by transforming them into viral vectors. The most frequently used vectors are lentiviral vectors (LVs), derived from the human immune deficiency virus allowing efficient gene transfer in mammalian cells. They represent one of the safest and most efficient treatments for monogenic diseases affecting the hematopoietic system. LVs are modified with different viral envelopes (pseudotyping) to alter and improve their tropism for different primary cell types. The vesicular stomatitis virus glycoprotein (VSV-G) is commonly used for pseudotyping as it enhances gene transfer into multiple hematopoietic cell types. However, VSV-G pseudotyped LVs are not able to confer efficient transduction in quiescent blood cells, such as hematopoietic stem cells (HSC), B and T cells. To solve this problem, VSV-G can be exchanged for other heterologous viral envelopes glycoproteins, such as those from the Measles virus, Baboon endogenous retrovirus, Cocal virus, Nipah virus or Sendai virus. Here, we provide an overview of how these LV pseudotypes improved transduction efficiency of HSC, B, T and natural killer (NK) cells, underlined by multiple in vitro and in vivo studies demonstrating how pseudotyped LVs deliver therapeutic genes or gene editing tools to treat different genetic diseases and efficiently generate CAR T cells for cancer treatment.
Collapse
Affiliation(s)
- Alejandra Gutierrez-Guerrero
- Gastroenterology and Hepatology Division, Joan and Sanford I. Weill Department of Medicine, Weill Cornell Medicine, Cornell University, New York, NY 10021, USA;
- The Jill Roberts Institute for Research in Inflammatory Bowel Disease, Weill Cornell Medicine, Cornell University, New York, NY 10021, USA
- CIRI, Université de Lyon, INSERM U1111, ENS de Lyon, Université Lyon 1, CNRS, UMR 5308, 69007 Lyon, France;
| | - François-Loïc Cosset
- CIRI, Université de Lyon, INSERM U1111, ENS de Lyon, Université Lyon 1, CNRS, UMR 5308, 69007 Lyon, France;
| | - Els Verhoeyen
- CIRI, Université de Lyon, INSERM U1111, ENS de Lyon, Université Lyon 1, CNRS, UMR 5308, 69007 Lyon, France;
- INSERM, C3M, Université Côte d’Azur, 06204 Nice, France
- Correspondence:
| |
Collapse
|
13
|
Ozog S, Chen CX, Simpson E, Garijo O, Timberlake ND, Minder P, Verhoeyen E, Torbett BE. CD46 Null Packaging Cell Line Improves Measles Lentiviral Vector Production and Gene Delivery to Hematopoietic Stem and Progenitor Cells. Mol Ther Methods Clin Dev 2019; 13:27-39. [PMID: 30603655 PMCID: PMC6310745 DOI: 10.1016/j.omtm.2018.11.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 11/21/2018] [Indexed: 12/15/2022]
Abstract
Lentiviral vectors (LVs) pseudotyped with the measles virus hemagglutinin (H) and fusion (F) glycoproteins have been reported to more efficiently transduce hematopoietic stem and progenitor cells (HSPCs) compared with vesicular stomatitis virus glycoprotein (VSV-G) pseudotyped LVs. However, a limit to H/F LV use is the low titer of produced vector. Here we show that measles receptor (CD46) expression on H/F transfected HEK293T vector-producing cells caused adjacent cell membrane fusion, resulting in multinucleate syncytia formation and death prior to peak vector production, leading to contaminating cell membranes that co-purified with LV. H/F LVs produced in CD46 null HEK293T cells, generated by CRISPR/Cas9-mediated knockout of CD46, produced 2-fold higher titer vector compared with LVs produced in CD46+ HEK293T cells. This resulted in approximately 2- to 3-fold higher transduction of HSPCs while significantly reducing target cell cytotoxicity caused by producer cell contaminates. Improved H/F LV entry into HSPCs and distinct entry mechanisms compared with VSV-G LV were also observed by confocal microscopy. Given that vector production is a major source of cost and variability in clinical trials of gene therapy, we propose that the use of CD46 null packaging cells may help to address these challenges.
Collapse
Affiliation(s)
- Stosh Ozog
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Craig X. Chen
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA 92037, USA
- The Bishops School, La Jolla, CA 92037, USA
| | - Elizabeth Simpson
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Olivia Garijo
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Nina D. Timberlake
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Petra Minder
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Els Verhoeyen
- CIRI–International Center for Infectiology Research, Team EVIR, Université de Lyon, Lyon, France
- Inserm, U1111; Ecole Normale Supérieure de Lyon, Lyon, France
- Université Lyon 1; CNRS, UMR5308, Lyon, France
- Université Côte d’Azur, INSERM, C3M, Nice, France
| | - Bruce E. Torbett
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA 92037, USA
| |
Collapse
|
14
|
Hung KL, Meitlis I, Hale M, Chen CY, Singh S, Jackson SW, Miao CH, Khan IF, Rawlings DJ, James RG. Engineering Protein-Secreting Plasma Cells by Homology-Directed Repair in Primary Human B Cells. Mol Ther 2017; 26:456-467. [PMID: 29273498 PMCID: PMC5835153 DOI: 10.1016/j.ymthe.2017.11.012] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 11/09/2017] [Accepted: 11/11/2017] [Indexed: 12/15/2022] Open
Abstract
The ability to engineer primary human B cells to differentiate into long-lived plasma cells and secrete a de novo protein may allow the creation of novel plasma cell therapies for protein deficiency diseases and other clinical applications. We initially developed methods for efficient genome editing of primary B cells isolated from peripheral blood. By delivering CRISPR/CRISPR-associated protein 9 (Cas9) ribonucleoprotein (RNP) complexes under conditions of rapid B cell expansion, we achieved site-specific gene disruption at multiple loci in primary human B cells (with editing rates of up to 94%). We used this method to alter ex vivo plasma cell differentiation by disrupting developmental regulatory genes. Next, we co-delivered RNPs with either a single-stranded DNA oligonucleotide or adeno-associated viruses containing homologous repair templates. Using either delivery method, we achieved targeted sequence integration at high efficiency (up to 40%) via homology-directed repair. This method enabled us to engineer plasma cells to secrete factor IX (FIX) or B cell activating factor (BAFF) at high levels. Finally, we show that introduction of BAFF into plasma cells promotes their engraftment into immunodeficient mice. Our results highlight the utility of genome editing in studying human B cell biology and demonstrate a novel strategy for modifying human plasma cells to secrete therapeutic proteins.
Collapse
Affiliation(s)
- King L Hung
- Center for Immunity and Immunotherapies, Seattle Children's Research Institute, Seattle, Washington, USA
| | - Iana Meitlis
- Center for Immunity and Immunotherapies, Seattle Children's Research Institute, Seattle, Washington, USA
| | - Malika Hale
- Center for Immunity and Immunotherapies, Seattle Children's Research Institute, Seattle, Washington, USA
| | - Chun-Yu Chen
- Center for Immunity and Immunotherapies, Seattle Children's Research Institute, Seattle, Washington, USA
| | - Swati Singh
- Center for Immunity and Immunotherapies, Seattle Children's Research Institute, Seattle, Washington, USA
| | - Shaun W Jackson
- Center for Immunity and Immunotherapies, Seattle Children's Research Institute, Seattle, Washington, USA
| | - Carol H Miao
- Center for Immunity and Immunotherapies, Seattle Children's Research Institute, Seattle, Washington, USA
| | - Iram F Khan
- Center for Immunity and Immunotherapies, Seattle Children's Research Institute, Seattle, Washington, USA
| | - David J Rawlings
- Center for Immunity and Immunotherapies, Seattle Children's Research Institute, Seattle, Washington, USA; Department of Pediatrics, University of Washington School of Medicine, Seattle, Washington, USA.
| | - Richard G James
- Center for Immunity and Immunotherapies, Seattle Children's Research Institute, Seattle, Washington, USA; Department of Pediatrics, University of Washington School of Medicine, Seattle, Washington, USA.
| |
Collapse
|
15
|
Measles virus envelope pseudotyped lentiviral vectors transduce quiescent human HSCs at an efficiency without precedent. Blood Adv 2017; 1:2088-2104. [PMID: 29296856 DOI: 10.1182/bloodadvances.2017007773] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Accepted: 09/18/2017] [Indexed: 11/20/2022] Open
Abstract
Hematopoietic stem cell (HSC)-based gene therapy trials are now moving toward the use of lentiviral vectors (LVs) with success. However, one challenge in the field remains: efficient transduction of HSCs without compromising their stem cell potential. Here we showed that measles virus glycoprotein-displaying LVs (hemagglutinin and fusion protein LVs [H/F-LVs]) were capable of transducing 100% of early-acting cytokine-stimulated human CD34+ (hCD34+) progenitor cells upon a single application. Strikingly, these H/F-LVs also allowed transduction of up to 70% of nonstimulated quiescent hCD34+ cells, whereas conventional vesicular stomatitis virus G (VSV-G)-LVs reached 5% at the most with H/F-LV entry occurring exclusively through the CD46 complement receptor. Importantly, reconstitution of NOD/SCIDγc-/- (NSG) mice with H/F-LV transduced prestimulated or resting hCD34+ cells confirmed these high transduction levels in all myeloid and lymphoid lineages. Remarkably, for resting CD34+ cells, secondary recipients exhibited increasing transduction levels of up to 100%, emphasizing that H/F-LVs efficiently gene-marked HSCs in the resting state. Because H/F-LVs promoted ex vivo gene modification of minimally manipulated CD34+ progenitors that maintained stemness, we assessed their applicability in Fanconi anemia, a bone marrow (BM) failure with chromosomal fragility. Notably, only H/F-LVs efficiently gene-corrected minimally stimulated hCD34+ cells in unfractionated BM from these patients. These H/F-LVs improved HSC gene delivery in the absence of cytokine stimulation while maintaining their stem cell potential. Thus, H/F-LVs will facilitate future clinical applications requiring HSC gene modification, including BM failure syndromes, for which treatment has been very challenging up to now.
Collapse
|
16
|
Sosale NG, Ivanovska II, Tsai RK, Swift J, Hsu JW, Alvey CM, Zoltick PW, Discher DE. "Marker of Self" CD47 on lentiviral vectors decreases macrophage-mediated clearance and increases delivery to SIRPA-expressing lung carcinoma tumors. Mol Ther Methods Clin Dev 2016; 3:16080. [PMID: 28053997 PMCID: PMC5148596 DOI: 10.1038/mtm.2016.80] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2016] [Revised: 10/05/2016] [Accepted: 10/06/2016] [Indexed: 02/08/2023]
Abstract
Lentiviruses infect many cell types and are now widely used for gene delivery in vitro, but in vivo uptake of these foreign vectors by macrophages is a limitation. Lentivectors are produced here from packaging cells that overexpress "Marker of Self" CD47, which inhibits macrophage uptake of cells when prophagocytic factors are also displayed. Single particle analyses show "hCD47-Lenti" display properly oriented human-CD47 for interactions with the macrophage's inhibitory receptor SIRPA. Macrophages derived from human and NOD/SCID/Il2rg-/- (NSG) mice show a SIRPA-dependent decrease in transduction, i.e., transgene expression, by hCD47-Lenti compared to control Lenti. Consistent with known "Self" signaling pathways, macrophage transduction by control Lenti is decreased by drug inhibition of Myosin-II to the same levels as hCD47-Lenti. In contrast, human lung carcinoma cells express SIRPA and use it to enhance transduction by hCD47-Lenti- as illustrated by more efficient gene deletion using CRISPR/Cas9. Intravenous injection of hCD47-Lenti into NSG mice shows hCD47 prolongs circulation, unless a blocking anti-SIRPA is preinjected. In vivo transduction of spleen and liver macrophages also decreases for hCD47-Lenti while transduction of lung carcinoma xenografts increases. hCD47 could be useful when macrophage uptake is limiting on other viral vectors that are emerging in cancer treatments (e.g., Measles glycoprotein-pseudotyped lentivectors) and also in targeting various SIRPA-expressing tumors such as glioblastomas.
Collapse
Affiliation(s)
- Nisha G Sosale
- Biophysical Engineering Labs, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Irena I Ivanovska
- Biophysical Engineering Labs, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Richard K Tsai
- Biophysical Engineering Labs, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Joe Swift
- Biophysical Engineering Labs, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Jake W Hsu
- Biophysical Engineering Labs, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Cory M Alvey
- Pharmacological Sciences Graduate Group, University of Pennsylvania, Pennsylvania, USA
| | - Philip W Zoltick
- Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Dennis E Discher
- Biophysical Engineering Labs, University of Pennsylvania, Philadelphia, Pennsylvania, USA
- Pharmacological Sciences Graduate Group, University of Pennsylvania, Pennsylvania, USA
| |
Collapse
|
17
|
Chira S, Jackson CS, Oprea I, Ozturk F, Pepper MS, Diaconu I, Braicu C, Raduly LZ, Calin GA, Berindan-Neagoe I. Progresses towards safe and efficient gene therapy vectors. Oncotarget 2016; 6:30675-703. [PMID: 26362400 PMCID: PMC4741561 DOI: 10.18632/oncotarget.5169] [Citation(s) in RCA: 134] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 08/22/2015] [Indexed: 12/11/2022] Open
Abstract
The emergence of genetic engineering at the beginning of the 1970′s opened the era of biomedical technologies, which aims to improve human health using genetic manipulation techniques in a clinical context. Gene therapy represents an innovating and appealing strategy for treatment of human diseases, which utilizes vehicles or vectors for delivering therapeutic genes into the patients' body. However, a few past unsuccessful events that negatively marked the beginning of gene therapy resulted in the need for further studies regarding the design and biology of gene therapy vectors, so that this innovating treatment approach can successfully move from bench to bedside. In this paper, we review the major gene delivery vectors and recent improvements made in their design meant to overcome the issues that commonly arise with the use of gene therapy vectors. At the end of the manuscript, we summarized the main advantages and disadvantages of common gene therapy vectors and we discuss possible future directions for potential therapeutic vectors.
Collapse
Affiliation(s)
- Sergiu Chira
- Research Center for Functional Genomics, Biomedicine and Translational Medicine, University of Medicine and Pharmacy "Iuliu Haţieganu", Cluj Napoca, Romania
| | - Carlo S Jackson
- Department of Immunology and Institute for Cellular and Molecular Medicine, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
| | - Iulian Oprea
- Department of Oncology and Pathology, Cancer Center Karolinska, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
| | - Ferhat Ozturk
- Department of Molecular Biology and Genetics, Canik Başari University, Samsun, Turkey
| | - Michael S Pepper
- Department of Immunology and Institute for Cellular and Molecular Medicine, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
| | | | - Cornelia Braicu
- Research Center for Functional Genomics, Biomedicine and Translational Medicine, University of Medicine and Pharmacy "Iuliu Haţieganu", Cluj Napoca, Romania
| | - Lajos-Zsolt Raduly
- Research Center for Functional Genomics, Biomedicine and Translational Medicine, University of Medicine and Pharmacy "Iuliu Haţieganu", Cluj Napoca, Romania.,Department of Physiopathology, Faculty of Veterinary Medicine, University of Agricultural Science and Veterinary Medicine, Cluj Napoca, Romania
| | - George A Calin
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Center for RNA Interference and Non-Coding RNAs, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Ioana Berindan-Neagoe
- Research Center for Functional Genomics, Biomedicine and Translational Medicine, University of Medicine and Pharmacy "Iuliu Haţieganu", Cluj Napoca, Romania.,Department of Immunology, University of Medicine and Pharmacy "Iuliu Haţieganu", Cluj Napoca, Romania.,Department of Functional Genomics and Experimental Pathology, Oncological Institute "Prof. Dr. Ion Chiricuţă", Cluj Napoca, Romania.,Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| |
Collapse
|
18
|
Measles Virus Hemagglutinin Protein Epitopes: The Basis of Antigenic Stability. Viruses 2016; 8:v8080216. [PMID: 27490564 PMCID: PMC4997578 DOI: 10.3390/v8080216] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 07/19/2016] [Accepted: 07/20/2016] [Indexed: 02/07/2023] Open
Abstract
Globally eliminating measles using available vaccines is biologically feasible because the measles virus (MV) hemagglutinin (H) protein is antigenically stable. The H protein is responsible for receptor binding, and is the main target of neutralizing antibodies. The immunodominant epitope, known as the hemagglutinating and noose epitope, is located near the receptor-binding site (RBS). The RBS also contains an immunodominant epitope. Loss of receptor binding correlates with an escape from the neutralization by antibodies that target the epitope at RBS. Another neutralizing epitope is located near RBS and is shielded by an N-linked sugar in certain genotype strains. However, human sera from vaccinees and measles patients neutralized all MV strains with similar efficiencies, regardless of the N-linked sugar modification or mutations at these epitopes. Two other major epitopes exist at a distance from RBS. One has an unstructured flexible domain with a linear neutralizing epitope. When MV-H forms a tetramer (dimer of dimers), these epitopes may form the dimer-dimer interface, and one of the two epitopes may also interact with the F protein. The neutralization mechanisms of antibodies that recognize these epitopes may involve inhibiting the H-F interaction or blocking the fusion cascade after MV-H binds to its receptors.
Collapse
|
19
|
Merten OW, Hebben M, Bovolenta C. Production of lentiviral vectors. MOLECULAR THERAPY-METHODS & CLINICAL DEVELOPMENT 2016; 3:16017. [PMID: 27110581 PMCID: PMC4830361 DOI: 10.1038/mtm.2016.17] [Citation(s) in RCA: 180] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Revised: 12/08/2015] [Accepted: 12/09/2015] [Indexed: 12/13/2022]
Abstract
Lentiviral vectors (LV) have seen considerably increase in use as gene therapy vectors for the treatment of acquired and inherited diseases. This review presents the state of the art of the production of these vectors with particular emphasis on their large-scale production for clinical purposes. In contrast to oncoretroviral vectors, which are produced using stable producer cell lines, clinical-grade LV are in most of the cases produced by transient transfection of 293 or 293T cells grown in cell factories. However, more recent developments, also, tend to use hollow fiber reactor, suspension culture processes, and the implementation of stable producer cell lines. As is customary for the biotech industry, rather sophisticated downstream processing protocols have been established to remove any undesirable process-derived contaminant, such as plasmid or host cell DNA or host cell proteins. This review compares published large-scale production and purification processes of LV and presents their process performances. Furthermore, developments in the domain of stable cell lines and their way to the use of production vehicles of clinical material will be presented.
Collapse
Affiliation(s)
| | | | - Chiara Bovolenta
- New Technologies Unit, Research Division, MolMed S.p.A. , Milan, Italy
| |
Collapse
|
20
|
Doerfler PA, Nayak S, Corti M, Morel L, Herzog RW, Byrne BJ. Targeted approaches to induce immune tolerance for Pompe disease therapy. MOLECULAR THERAPY-METHODS & CLINICAL DEVELOPMENT 2016; 3:15053. [PMID: 26858964 PMCID: PMC4729315 DOI: 10.1038/mtm.2015.53] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 11/04/2015] [Accepted: 11/28/2015] [Indexed: 12/31/2022]
Abstract
Enzyme and gene replacement strategies have developed into viable therapeutic approaches for the treatment of Pompe disease (acid α-glucosidase (GAA) deficiency). Unfortunately, the introduction of GAA and viral vectors encoding the enzyme can lead to detrimental immune responses that attenuate treatment benefits and can impact patient safety. Preclinical and clinical experience in addressing humoral responses toward enzyme and gene therapy for Pompe disease have provided greater understanding of the immunological consequences of the provided therapy. B- and T-cell modulation has been shown to be effective in preventing infusion-associated reactions during enzyme replacement therapy in patients and has shown similar success in the context of gene therapy. Additional techniques to induce humoral tolerance for Pompe disease have been the targeted expression or delivery of GAA to discrete cell types or tissues such as the gut-associated lymphoid tissues, red blood cells, hematopoietic stem cells, and the liver. Research into overcoming preexisting immunity through immunomodulation and gene transfer are becoming increasingly important to achieve long-term efficacy. This review highlights the advances in therapies as well as the improved understanding of the molecular mechanisms involved in the humoral immune response with emphasis on methods employed to overcome responses associated with enzyme and gene therapies for Pompe disease.
Collapse
Affiliation(s)
- Phillip A Doerfler
- Department of Pediatrics, University of Florida , Gainesville, Florida, USA
| | - Sushrusha Nayak
- Department of Medicine, Karolinska Institute , Stockholm, Sweden
| | - Manuela Corti
- Department of Pediatrics, University of Florida , Gainesville, Florida, USA
| | - Laurence Morel
- Department of Pathology, Immunology, and Laboratory Medicine, University of Florida , Gainesville, Florida, USA
| | - Roland W Herzog
- Department of Pediatrics, University of Florida , Gainesville, Florida, USA
| | - Barry J Byrne
- Department of Pediatrics, University of Florida , Gainesville, Florida, USA
| |
Collapse
|
21
|
Buchholz CJ, Friedel T, Büning H. Surface-Engineered Viral Vectors for Selective and Cell Type-Specific Gene Delivery. Trends Biotechnol 2015; 33:777-790. [PMID: 26497425 DOI: 10.1016/j.tibtech.2015.09.008] [Citation(s) in RCA: 99] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 09/08/2015] [Accepted: 09/11/2015] [Indexed: 12/12/2022]
Abstract
Recent progress in gene transfer technology enables the delivery of genes precisely to the application-relevant cell type ex vivo on cultivated primary cells or in vivo on local or systemic administration. Gene vectors based on lentiviruses or adeno-associated viruses can be engineered such that they use a cell surface marker of choice for cell entry instead of their natural receptors. Binding to the surface marker is mediated by a targeting ligand displayed on the vector particle surface, which can be a peptide, single-chain antibody, or designed ankyrin repeat protein. Examples include vectors that deliver genes to specialized endothelial cells or lymphocytes, tumor cells, or particular cells of the nervous system with potential applications in gene function studies and molecular medicine.
Collapse
Affiliation(s)
- Christian J Buchholz
- Paul-Ehrlich-Institut, 63225 Langen, Germany; German Cancer Consortium, 69120 Heidelberg, Germany.
| | | | - Hildegard Büning
- Institute of Experimental Hematology, Hannover Medical School, 30625 Hannover, Germany; Center for Molecular Medicine Cologne (CMMC), University of Cologne, 50931 Cologne, Germany; German Center for Infection Research (DZIF), partner sites Bonn-Cologne and Hannover-Braunschweig, Germany
| |
Collapse
|
22
|
Lévy C, Verhoeyen E, Cosset FL. Surface engineering of lentiviral vectors for gene transfer into gene therapy target cells. Curr Opin Pharmacol 2015; 24:79-85. [DOI: 10.1016/j.coph.2015.08.003] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Revised: 06/09/2015] [Accepted: 08/05/2015] [Indexed: 10/23/2022]
|
23
|
Zhou Q, Uhlig KM, Muth A, Kimpel J, Lévy C, Münch RC, Seifried J, Pfeiffer A, Trkola A, Coulibaly C, von Laer D, Wels WS, Hartwig UF, Verhoeyen E, Buchholz CJ. Exclusive Transduction of Human CD4+ T Cells upon Systemic Delivery of CD4-Targeted Lentiviral Vectors. THE JOURNAL OF IMMUNOLOGY 2015; 195:2493-501. [PMID: 26232436 DOI: 10.4049/jimmunol.1500956] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Accepted: 07/02/2015] [Indexed: 11/19/2022]
Abstract
Playing a central role in both innate and adaptive immunity, CD4(+) T cells are a key target for genetic modifications in basic research and immunotherapy. In this article, we describe novel lentiviral vectors (CD4-LV) that have been rendered selective for human or simian CD4(+) cells by surface engineering. When applied to PBMCs, CD4-LV transduced CD4(+) but not CD4(-) cells. Notably, also unstimulated T cells were stably genetically modified. Upon systemic or intrasplenic administration into mice reconstituted with human PBMCs or hematopoietic stem cells, reporter gene expression was predominantly detected in lymphoid organs. Evaluation of GFP expression in organ-derived cells and blood by flow cytometry demonstrated exclusive gene transfer into CD4(+) human lymphocytes. In bone marrow and spleen, memory T cells were preferentially hit. Toward therapeutic applications, we also show that CD4-LV can be used for HIV gene therapy, as well as for tumor therapy, by delivering chimeric Ag receptors. The potential for in vivo delivery of the FOXP3 gene was also demonstrated, making CD4-LV a powerful tool for inducible regulatory T cell generation. In summary, our work demonstrates the exclusive gene transfer into a T cell subset upon systemic vector administration opening an avenue toward novel strategies in immunotherapy.
Collapse
Affiliation(s)
- Qi Zhou
- Molecular Biotechnology and Gene Therapy, Paul-Ehrlich-Institut, 63225 Langen, Germany
| | - Katharina M Uhlig
- Molecular Biotechnology and Gene Therapy, Paul-Ehrlich-Institut, 63225 Langen, Germany
| | - Anke Muth
- Molecular Biotechnology and Gene Therapy, Paul-Ehrlich-Institut, 63225 Langen, Germany
| | - Janine Kimpel
- Division of Virology, Medical University of Innsbruck, A-6020 Innsbruck, Austria
| | - Camille Lévy
- Centre International de Recherche en Infectiologie, Virus Enveloppés, Vecteurs et Réponses Innées Équipe, INSERM U1111, Centre National de la Recherche Scientifique, Unités Mixtes de Recherche 5308, Université de Lyon-1, École Normale Supérieure de Lyon, 69007 Lyon, France
| | - Robert C Münch
- Molecular Biotechnology and Gene Therapy, Paul-Ehrlich-Institut, 63225 Langen, Germany
| | - Janna Seifried
- Host Pathogen Interactions, Paul-Ehrlich-Institut, 63225 Langen, Germany
| | - Anett Pfeiffer
- Molecular Biotechnology and Gene Therapy, Paul-Ehrlich-Institut, 63225 Langen, Germany
| | - Alexandra Trkola
- Institute of Medical Virology, University of Zurich, CH-8057 Zurich, Switzerland
| | - Cheick Coulibaly
- Central Animal Unit, Paul-Ehrlich-Institut, 63225 Langen, Germany
| | - Dorothee von Laer
- Division of Virology, Medical University of Innsbruck, A-6020 Innsbruck, Austria
| | - Winfried S Wels
- Georg-Speyer-Haus, Institute for Tumor Biology and Experimental Therapy, D-60596 Frankfurt, Germany
| | - Udo F Hartwig
- 3rd Department of Medicine-Hematology, Internal Oncology and Pneumology, University Medical Center of Johannes Gutenberg-University Mainz, 55131 Mainz, Germany
| | - Els Verhoeyen
- Centre International de Recherche en Infectiologie, Virus Enveloppés, Vecteurs et Réponses Innées Équipe, INSERM U1111, Centre National de la Recherche Scientifique, Unités Mixtes de Recherche 5308, Université de Lyon-1, École Normale Supérieure de Lyon, 69007 Lyon, France; INSERM U1065, Centre Méditerranéen de Médecine Moléculaire, Équipe 3, 06204 Nice, France; and
| | - Christian J Buchholz
- Molecular Biotechnology and Gene Therapy, Paul-Ehrlich-Institut, 63225 Langen, Germany; German Cancer Consortium, 69120 Heidelberg, Germany
| |
Collapse
|
24
|
Brendel C, Goebel B, Daniela A, Brugman M, Kneissl S, Schwäble J, Kaufmann KB, Müller-Kuller U, Kunkel H, Chen-Wichmann L, Abel T, Serve H, Bystrykh L, Buchholz CJ, Grez M. CD133-targeted gene transfer into long-term repopulating hematopoietic stem cells. Mol Ther 2014; 23:63-70. [PMID: 25189742 DOI: 10.1038/mt.2014.173] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Accepted: 08/25/2014] [Indexed: 11/09/2022] Open
Abstract
Gene therapy for hematological disorders relies on the genetic modification of CD34(+) cells, a heterogeneous cell population containing about 0.01% long-term repopulating cells. Here, we show that the lentiviral vector CD133-LV, which uses a surface marker on human primitive hematopoietic stem cells (HSCs) as entry receptor, transfers genes preferentially into cells with high engraftment capability. Transduction of unstimulated CD34(+) cells with CD133-LV resulted in gene marking of cells with competitive proliferative advantage in vitro and in immunodeficient mice. The CD133-LV-transduced population contained significantly more cells with repopulating capacity than cells transduced with vesicular stomatitis virus (VSV)-LV, a lentiviral vector pseudotyped with the vesicular stomatitis virus G protein. Upon transfer of a barcode library, CD133-LV-transduced cells sustained gene marking in vivo for a prolonged period of time with a 6.7-fold higher recovery of barcodes compared to transduced control cells. Moreover, CD133-LV-transduced cells were capable of repopulating secondary recipients. Lastly, we show that this targeting strategy can be used for transfer of a therapeutic gene into CD34(+) cells obtained from patients suffering of X-linked chronic granulomatous disease. In conclusion, direct gene transfer into CD133(+) cells allows for sustained long-term engraftment of gene corrected cells.
Collapse
Affiliation(s)
- Christian Brendel
- 1] Institute for Tumor Biology and Experimental Therapy, Georg-Speyer-Haus, Frankfurt, Germany [2] Current address: Division of Pediatric Hematology/Oncology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Benjamin Goebel
- Department of Medicine, Hematology/Oncology, JW-Goethe-University, Frankfurt/M, Germany
| | - Abriss Daniela
- Institute for Tumor Biology and Experimental Therapy, Georg-Speyer-Haus, Frankfurt, Germany
| | - Martijn Brugman
- Department of Immunohematology and Blood Transfusion (IHB) Leiden University Medical Center, Leiden, Netherlands
| | - Sabrina Kneissl
- 1] Molecular Biotechnology and Gene Therapy, Paul-Ehrlich-Institut, Langen, Germany [2] Current address: Division of Haematology/Transfusion Medicine, Paul-Ehrlich-Institut, Langen, Germany
| | - Joachim Schwäble
- Institute for Transfusion Medicine and Immune Hematology, Clinics of the Johann Wolfgang Goethe University, German Red Cross Blood Donor Service Baden-Wuerttemberg-Hessen, Frankfurt am Main, Hessen, Germany
| | - Kerstin B Kaufmann
- Institute for Tumor Biology and Experimental Therapy, Georg-Speyer-Haus, Frankfurt, Germany
| | - Uta Müller-Kuller
- Institute for Tumor Biology and Experimental Therapy, Georg-Speyer-Haus, Frankfurt, Germany
| | - Hana Kunkel
- Institute for Tumor Biology and Experimental Therapy, Georg-Speyer-Haus, Frankfurt, Germany
| | - Linping Chen-Wichmann
- 1] Institute for Tumor Biology and Experimental Therapy, Georg-Speyer-Haus, Frankfurt, Germany [2] Current address: Experimental Cell Therapy and Hematology, Department of Transfusion Medicine, Cell Therapy and Haemostaseology, Ludwig Maximilian University Hospital Munich, Munich, Germany
| | - Tobias Abel
- Molecular Biotechnology and Gene Therapy, Paul-Ehrlich-Institut, Langen, Germany
| | - Hubert Serve
- Department of Medicine, Hematology/Oncology, JW-Goethe-University, Frankfurt/M, Germany
| | - Leonid Bystrykh
- Department of Cell Biology, University Medical Center Groningen, Groningen, Netherlands
| | - Christian J Buchholz
- Molecular Biotechnology and Gene Therapy, Paul-Ehrlich-Institut, Langen, Germany
| | - Manuel Grez
- Institute for Tumor Biology and Experimental Therapy, Georg-Speyer-Haus, Frankfurt, Germany
| |
Collapse
|
25
|
Mutations in the H, F, or M Proteins Can Facilitate Resistance of Measles Virus to Neutralizing Human Anti-MV Sera. Adv Virol 2014; 2014:205617. [PMID: 24648840 PMCID: PMC3932291 DOI: 10.1155/2014/205617] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Revised: 10/15/2013] [Accepted: 10/30/2013] [Indexed: 11/18/2022] Open
Abstract
Although there is currently no evidence of emerging strains of measles virus (MV) that can resist neutralization by the anti-MV antibodies present in vaccinees, certain mutations in circulating wt MV strains appear to reduce the efficacy of these antibodies. Moreover, it has been hypothesized that resistance to neutralization by such antibodies could allow MV to persist. In this study, we use a novel in vitro system to determine the molecular basis of MV's resistance to neutralization. We find that both wild-type and laboratory strain MV variants that escape neutralization by anti-MV polyclonal sera possess multiple mutations in their H, F, and M proteins. Cytometric analysis of cells expressing viral escape mutants possessing minimal mutations and their plasmid-expressed H, F, and M proteins indicates that immune resistance is due to particular mutations that can occur in any of these three proteins that affect at distance, rather than directly, the native conformation of the MV-H globular head and hence its epitopes. A high percentage of the escape mutants contain mutations found in cases of Subacute Sclerosing Panencephalitis (SSPE) and our results could potentially shed light on the pathogenesis of this rare fatal disease.
Collapse
|
26
|
Preferential lentiviral targeting of astrocytes in the central nervous system. PLoS One 2013; 8:e76092. [PMID: 24098426 PMCID: PMC3788778 DOI: 10.1371/journal.pone.0076092] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2013] [Accepted: 08/21/2013] [Indexed: 12/22/2022] Open
Abstract
The ability to visualize and genetically manipulate specific cell populations of the central nervous system (CNS) is fundamental to a better understanding of brain functions at the cellular and molecular levels. Tools to selectively target cells of the CNS include molecular genetics, imaging, and use of transgenic animals. However, these approaches are technically challenging, time consuming, and difficult to control. Viral-mediated targeting of cells in the CNS can be highly beneficial for studying and treating neurodegenerative diseases. Yet, despite specific marking of numerous cell types in the CNS, in vivo selective targeting of astrocytes has not been optimized. In this study, preferential targeting of astrocytes in the CNS was demonstrated using engineered lentiviruses that were pseudotyped with a modified Sindbis envelope and displayed anti-GLAST IgG on their surfaces as an attachment moiety. Viral tropism for astrocytes was initially verified in vitro in primary mixed glia cultures. When injected into the brains of mice, lentiviruses that displayed GLAST IgG on their surface, exhibited preferential astrocyte targeting, compared to pseudotyped lentiviruses that did not incorporate any IgG or that expressed a control isotype IgG. Overall, this approach is highly flexible and can be exploited to selectively target astrocytes or other cell types of the CNS. As such, it can open a window to visualize and genetically manipulate astrocytes or other cells of the CNS as means of research and treatment.
Collapse
|
27
|
Schambach A, Zychlinski D, Ehrnstroem B, Baum C. Biosafety features of lentiviral vectors. Hum Gene Ther 2013; 24:132-42. [PMID: 23311447 DOI: 10.1089/hum.2012.229] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Over the past decades, lentiviral vectors have evolved as a benchmark tool for stable gene transfer into cells with a high replicative potential. Their relatively flexible genome and ability to transduce many forms of nondividing cells, combined with the potential for cell-specific pseudotyping, provides a rich resource for numerous applications in experimental platforms and therapeutic settings. Here, we give an overview of important biosafety features of lentiviral vectors, with detailed discussion of (i) the principles of the lentiviral split-genome design used for the construction of packaging cells; (ii) the relevance of modifications introduced into the lentiviral long terminal repeat (deletion of enhancer/promoter sequences and introduction of insulators); (iii) the basic features of mRNA processing, including the Rev/Rev-responsive element (RRE) interaction and the modifications of the 3' untranslated region of lentiviral vectors with various post-transcriptional regulatory elements affecting transcriptional termination, polyadenylation, and differentiation-specific degradation of mRNA; and (iv) the characteristic integration pattern with the associated risk of transcriptional interference with cellular genes. We conclude with considerations regarding the importance of cell targeting via envelope modifications. Along this course, we address canonical biosafety issues encountered with any type of viral vector: the risks of shedding, mobilization, germline transmission, immunogenicity, and insertional mutagenesis.
Collapse
Affiliation(s)
- Axel Schambach
- Institute of Experimental Hematology, Hannover Medical School, D-30625 Hannover, Germany
| | | | | | | |
Collapse
|
28
|
Nipah virus envelope-pseudotyped lentiviruses efficiently target ephrinB2-positive stem cell populations in vitro and bypass the liver sink when administered in vivo. J Virol 2012. [PMID: 23192877 DOI: 10.1128/jvi.02032-12] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Sophisticated retargeting systems for lentiviral vectors have been developed in recent years. Most seek to suppress the viral envelope's natural tropism while modifying the receptor-binding domain such that its tropism is determined by the specificity of the engineered ligand-binding motif. Here we took advantage of the natural tropism of Nipah virus (NiV), whose attachment envelope glycoprotein has picomolar affinity for ephrinB2, a molecule proposed as a molecular marker of "stemness" (present on embryonic, hematopoietic, and neural stem cells) as well as being implicated in tumorigenesis of specific cancers. NiV entry requires both the fusion (F) and attachment (G) glycoproteins. Truncation of the NiV-F cytoplasmic tail (T5F) alone, combined with full-length NiV-G, resulted in optimal titers of NiV-pseudotyped particles (NiVpp) (∼10(6) IU/ml), even without ultracentrifugation. To further enhance the infectivity of NiVpp, we engineered a hyperfusogenic NiV-F protein lacking an N-linked glycosylation site (T5FΔN3). T5FΔN3/wt G particles exhibited enhanced infectivity on less permissive cell lines and efficiently targeted ephrinB2(+) cells even in a 1,000-fold excess of ephrinB2-negative cells, all without any loss of specificity, as entry was abrogated by soluble ephrinB2. NiVpp also transduced human embryonic, hematopoietic, and neural stem cell populations in an ephrinB2-dependent manner. Finally, intravenous administration of the luciferase reporter NiVpp-T5FΔN3/G to mice resulted in signals being detected in the spleen and lung but not in the liver. Bypassing the liver sink is a critical barrier for targeted gene therapy. The extraordinary specificity of NiV-G for ephrinB2 holds promise for targeting specific ephrinB2(+) populations in vivo or in vitro.
Collapse
|
29
|
Kneissl S, Abel T, Rasbach A, Brynza J, Schneider-Schaulies J, Buchholz CJ. Measles virus glycoprotein-based lentiviral targeting vectors that avoid neutralizing antibodies. PLoS One 2012; 7:e46667. [PMID: 23071609 PMCID: PMC3468630 DOI: 10.1371/journal.pone.0046667] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Accepted: 09/01/2012] [Indexed: 12/19/2022] Open
Abstract
Lentiviral vectors (LVs) are potent gene transfer vehicles frequently applied in research and recently also in clinical trials. Retargeting LV entry to cell types of interest is a key issue to improve gene transfer safety and efficacy. Recently, we have developed a targeting method for LVs by incorporating engineered measles virus (MV) glycoproteins, the hemagglutinin (H), responsible for receptor recognition, and the fusion protein into their envelope. The H protein displays a single-chain antibody (scFv) specific for the target receptor and is ablated for recognition of the MV receptors CD46 and SLAM by point mutations in its ectodomain. A potential hindrance to systemic administration in humans is pre-existing MV-specific immunity due to vaccination or natural infection. We compared transduction of targeting vectors and non-targeting vectors pseudotyped with MV glycoproteins unmodified in their ectodomains (MV-LV) in presence of α-MV antibody-positive human plasma. At plasma dilution 1:160 MV-LV was almost completely neutralized, whereas targeting vectors showed relative transduction efficiencies from 60% to 90%. Furthermore, at plasma dilution 1:80 an at least 4-times higher multiplicity of infection (MOI) of MV-LV had to be applied to obtain similar transduction efficiencies as with targeting vectors. Also when the vectors were normalized to their p24 values, targeting vectors showed partial protection against α-MV antibodies in human plasma. Furthermore, the monoclonal neutralizing antibody K71 with a putative epitope close to the receptor binding sites of H, did not neutralize the targeting vectors, but did neutralize MV-LV. The observed escape from neutralization may be due to the point mutations in the H ectodomain that might have destroyed antibody binding sites. Furthermore, scFv mediated cell entry via the target receptor may proceed in presence of α-MV antibodies interfering with entry via the natural MV receptors. These results are promising for in vivo applications of targeting vectors in humans.
Collapse
Affiliation(s)
- Sabrina Kneissl
- Molecular Biotechnology and Gene Therapy, Paul-Ehrlich-Institut, Langen, Germany
- * E-mail: (SK); (CJB)
| | - Tobias Abel
- Molecular Biotechnology and Gene Therapy, Paul-Ehrlich-Institut, Langen, Germany
| | - Anke Rasbach
- Molecular Biotechnology and Gene Therapy, Paul-Ehrlich-Institut, Langen, Germany
| | - Julia Brynza
- Molecular Biotechnology and Gene Therapy, Paul-Ehrlich-Institut, Langen, Germany
| | | | - Christian J. Buchholz
- Molecular Biotechnology and Gene Therapy, Paul-Ehrlich-Institut, Langen, Germany
- * E-mail: (SK); (CJB)
| |
Collapse
|