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Dudek AM, Feist WN, Sasu EJ, Luna SE, Ben-Efraim K, Bak RO, Cepika AM, Porteus MH. A simultaneous knockout knockin genome editing strategy in HSPCs potently inhibits CCR5- and CXCR4-tropic HIV-1 infection. Cell Stem Cell 2024; 31:499-518.e6. [PMID: 38579682 PMCID: PMC11212398 DOI: 10.1016/j.stem.2024.03.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 12/29/2023] [Accepted: 03/06/2024] [Indexed: 04/07/2024]
Abstract
Allogeneic hematopoietic stem and progenitor cell transplant (HSCT) of CCR5 null (CCR5Δ32) cells can be curative for HIV-1-infected patients. However, because allogeneic HSCT poses significant risk, CCR5Δ32 matched bone marrow donors are rare, and CCR5Δ32 transplant does not confer resistance to the CXCR4-tropic virus, it is not a viable option for most patients. We describe a targeted Cas9/AAV6-based genome editing strategy for autologous HSCT resulting in both CCR5- and CXCR4-tropic HIV-1 resistance. Edited human hematopoietic stem and progenitor cells (HSPCs) maintain multi-lineage repopulation capacity in vivo, and edited primary human T cells potently inhibit infection by both CCR5-tropic and CXCR4-tropic HIV-1. Modification rates facilitated complete loss of CCR5-tropic replication and up to a 2,000-fold decrease in CXCR4-tropic replication without CXCR4 locus disruption. This multi-factor editing strategy in HSPCs could provide a broad approach for autologous HSCT as a functional cure for both CCR5-tropic and CXCR4-tropic HIV-1 infections.
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Affiliation(s)
- Amanda M Dudek
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA; Institute for Stem Cell Biology & Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - William N Feist
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA; Institute for Stem Cell Biology & Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Elena J Sasu
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA; Institute for Stem Cell Biology & Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Sofia E Luna
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA; Institute for Stem Cell Biology & Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Kaya Ben-Efraim
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA; Institute for Stem Cell Biology & Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Rasmus O Bak
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA; Department of Biomedicine, Aarhus University, 8000 Aarhus, Denmark; Aarhus Institute of Advanced Studies (AIAS), Aarhus University, 8000 Aarhus, Denmark
| | - Alma-Martina Cepika
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA; Institute for Stem Cell Biology & Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Matthew H Porteus
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA; Institute for Stem Cell Biology & Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA.
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2
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Lu B, Lim JM, Yu B, Song S, Neeli P, Sobhani N, K P, Bonam SR, Kurapati R, Zheng J, Chai D. The next-generation DNA vaccine platforms and delivery systems: advances, challenges and prospects. Front Immunol 2024; 15:1332939. [PMID: 38361919 PMCID: PMC10867258 DOI: 10.3389/fimmu.2024.1332939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 01/17/2024] [Indexed: 02/17/2024] Open
Abstract
Vaccines have proven effective in the treatment and prevention of numerous diseases. However, traditional attenuated and inactivated vaccines suffer from certain drawbacks such as complex preparation, limited efficacy, potential risks and others. These limitations restrict their widespread use, especially in the face of an increasingly diverse range of diseases. With the ongoing advancements in genetic engineering vaccines, DNA vaccines have emerged as a highly promising approach in the treatment of both genetic diseases and acquired diseases. While several DNA vaccines have demonstrated substantial success in animal models of diseases, certain challenges need to be addressed before application in human subjects. The primary obstacle lies in the absence of an optimal delivery system, which significantly hampers the immunogenicity of DNA vaccines. We conduct a comprehensive analysis of the current status and limitations of DNA vaccines by focusing on both viral and non-viral DNA delivery systems, as they play crucial roles in the exploration of novel DNA vaccines. We provide an evaluation of their strengths and weaknesses based on our critical assessment. Additionally, the review summarizes the most recent advancements and breakthroughs in pre-clinical and clinical studies, highlighting the need for further clinical trials in this rapidly evolving field.
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Affiliation(s)
- Bowen Lu
- Cancer Institute, Xuzhou Medical University, Xuzhou, Jiangsu, China
- Jiangsu Center for the Collaboration and Innovation of Cancer Biotherapy, Cancer Institute, Xuzhou Medical University, Xuzhou, Jiangsu, China
- Center of Clinical Oncology, Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Jing Ming Lim
- Department of Medicine, Baylor College of Medicine, Houston, TX, United States
| | - Boyue Yu
- Department of Environmental Science, Policy, and Management, University of California at Berkeley, Berkeley, CA, United States
| | - Siyuan Song
- Department of Neuroscience, Baylor College of Medicine, Houston, TX, United States
| | - Praveen Neeli
- Department of Medicine, Baylor College of Medicine, Houston, TX, United States
| | - Navid Sobhani
- Department of Medicine, Baylor College of Medicine, Houston, TX, United States
| | - Pavithra K
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Thiruvananthapuram, India
| | - Srinivasa Reddy Bonam
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, United States
| | - Rajendra Kurapati
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Thiruvananthapuram, India
| | - Junnian Zheng
- Jiangsu Center for the Collaboration and Innovation of Cancer Biotherapy, Cancer Institute, Xuzhou Medical University, Xuzhou, Jiangsu, China
- Center of Clinical Oncology, Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Dafei Chai
- Cancer Institute, Xuzhou Medical University, Xuzhou, Jiangsu, China
- Jiangsu Center for the Collaboration and Innovation of Cancer Biotherapy, Cancer Institute, Xuzhou Medical University, Xuzhou, Jiangsu, China
- Department of Medicine, Baylor College of Medicine, Houston, TX, United States
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3
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Buck AM, Deveau TM, Henrich TJ, Deitchman AN. Challenges in HIV-1 Latent Reservoir and Target Cell Quantification in CAR-T Cell and Other Lentiviral Gene Modifying HIV Cure Strategies. Viruses 2023; 15:1126. [PMID: 37243212 PMCID: PMC10222761 DOI: 10.3390/v15051126] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/03/2023] [Accepted: 05/06/2023] [Indexed: 05/28/2023] Open
Abstract
Gene-modification therapies are at the forefront of HIV-1 cure strategies. Chimeric antigen receptor (CAR)-T cells pose a potential approach to target infected cells during antiretroviral therapy or following analytical treatment interruption (ATI). However, there are technical challenges in the quantification of HIV-1-infected and CAR-T cells in the setting of lentiviral CAR gene delivery and also in the identification of cells expressing target antigens. First, there is a lack of validated techniques to identify and characterize cells expressing the hypervariable HIV gp120 in both ART-suppressed and viremic individuals. Second, close sequence homology between lentiviral-based CAR-T gene modification vectors and conserved regions of HIV-1 creates quantification challenges of HIV-1 and lentiviral vector levels. Consideration needs to be taken into standardizing HIV-1 DNA/RNA assays in the setting of CAR-T cell and other lentiviral vector-based therapies to avoid these confounding interactions. Lastly, with the introduction of HIV-1 resistance genes in CAR-T cells, there is a need for assays with single-cell resolution to determine the competence of the gene inserts to prevent CAR-T cells from becoming infected in vivo. As novel therapies continue to arise in the HIV-1 cure field, resolving these challenges in CAR-T-cell therapy will be crucial.
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Affiliation(s)
- Amanda M. Buck
- Division of Experimental Medicine, University of California San Francisco, San Francisco, CA 94110, USA
| | - Tyler-Marie Deveau
- Division of Experimental Medicine, University of California San Francisco, San Francisco, CA 94110, USA
| | - Timothy J. Henrich
- Division of Experimental Medicine, University of California San Francisco, San Francisco, CA 94110, USA
| | - Amelia N. Deitchman
- Department of Clinical Pharmacy, University of California San Francisco, San Francisco, CA 94110, USA
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4
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Nanoparticle-based strategies to target HIV-infected cells. Colloids Surf B Biointerfaces 2022; 213:112405. [PMID: 35255375 DOI: 10.1016/j.colsurfb.2022.112405] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 01/31/2022] [Accepted: 02/07/2022] [Indexed: 02/06/2023]
Abstract
Antiretroviral drugs employed for the treatment of human immunodeficiency virus (HIV) infections have remained largely ineffective due to their poor bioavailability, numerous adverse effects, modest uptake in infected cells, undesirable drug-drug interactions, the necessity for long-term drug therapy, and lack of access to tissues and reservoirs. Nanotechnology-based interventions could serve to overcome several of these disadvantages and thereby improve the therapeutic efficacy of antiretrovirals while reducing the morbidity and mortality due to the disease. However, attempts to use nanocarriers for the delivery of anti-retroviral drugs have started gaining momentum only in the past decade. This review explores in-depth the various nanocarriers that have been employed for the treatment of HIV infections highlighting their merits and possible demerits.
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5
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Park UC, Park SS, Kim BH, Park SW, Kim YJ, Cary W, Anderson JD, Nolta JA, Yu HG. Subretinal versus intravitreal administration of human CD34+ bone marrow-derived stem cells in a rat model of inherited retinal degeneration. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:1275. [PMID: 34532412 PMCID: PMC8421968 DOI: 10.21037/atm-20-4662] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 09/28/2020] [Indexed: 12/28/2022]
Abstract
Background To evaluate whether subretinal or intravitreal injection of human CD34+ bone marrow-derived stem cells (BMSC) can have protective effects on retinal degeneration that may be enhanced by coadministration of exosomes harvested from human bone marrow mesenchymal stem cells (MSCs). Methods Human CD34+ cells were harvested from the mononuclear cell fraction of bone marrow using magnetic beads and labeled with EGFP. Exosomes were harvested from cultured human MSCs under hypoxic conditions. Royal College of Surgeons (RCS) 3-weeks-old rats, immunosuppressed with cyclosporine A, received subretinal or intravitreal injection of CD34+ cells (50,000 cells), CD34+ cells with exosomes (50,000 cells+10 µg), exosomes alone (10 µg), or PBS. Retinal function was examined using electroretinography (ERG), and the eyes were harvested for histologic and immunohistochemical analysis. Results The b-wave amplitude of ERG at 2 weeks after injection was significantly higher in eyes with subretinal or intravitreal CD34+ BMSC alone or in combination with exosomes when compared to PBS injected eyes or untreated contralateral eyes. At 4 weeks after injection, the ERG signal decreased in all groups but eyes with subretinal CD34+ BMSCs alone or combined with exosomes showed partially preserved ERG signal and preservation of the outer nuclear layer of the retina near the injection site on histology when compared to eyes with PBS injection. Immunohistochemical analysis identified the human cells in the outer retina. Subretinal or intravitreal exosome injection had no effect on retinal degeneration when administered alone or in combination with CD34+ cells. Conclusions Both subretinal and intravitreal injection of human CD34+ BMSCs can provide functional rescue of degenerating retina, although the effects were attenuated over time in this rat model. Regional preservation of the outer retina can occur near the subretinal injection site of CD34+ cells. These results suggest that CD34+ cells may have therapeutic potential in retinal degeneration.
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Affiliation(s)
- Un Chul Park
- Department of Ophthalmology, College of Medicine, Seoul National University, Seoul, Korea.,Retinal Degeneration Research Laboratory, Seoul National University Hospital Biomedical Research Institute, Seoul, Korea
| | - Susanna S Park
- Department of Ophthalmology & Vision Science, University of California Davis. Sacramento, CA, USA
| | - Bo Hee Kim
- Department of Ophthalmology, College of Medicine, Seoul National University, Seoul, Korea.,Retinal Degeneration Research Laboratory, Seoul National University Hospital Biomedical Research Institute, Seoul, Korea
| | - Sung Wook Park
- Department of Ophthalmology, College of Medicine, Seoul National University, Seoul, Korea.,Retinal Degeneration Research Laboratory, Seoul National University Hospital Biomedical Research Institute, Seoul, Korea
| | - Young Joo Kim
- Retinal Degeneration Research Laboratory, Seoul National University Hospital Biomedical Research Institute, Seoul, Korea
| | - Whitney Cary
- Stem Cell Program, Institute for Regenerative Cures, University of California Davis, Sacramento, CA, USA
| | - Johnathon D Anderson
- Stem Cell Program, Institute for Regenerative Cures, University of California Davis, Sacramento, CA, USA.,Department of Otolaryngology, School of Medicine, University of California Davis. Sacramento, CA, USA
| | - Jan A Nolta
- Stem Cell Program, Institute for Regenerative Cures, University of California Davis, Sacramento, CA, USA
| | - Hyeong Gon Yu
- Department of Ophthalmology, College of Medicine, Seoul National University, Seoul, Korea.,Retinal Degeneration Research Laboratory, Seoul National University Hospital Biomedical Research Institute, Seoul, Korea.,Seoul National University College of Medicine, Interdisciplinary Programs: Stem Cell Biology, Seoul, Korea
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6
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Dahlenburg H, Cameron D, Yang S, Bachman A, Pollock K, Cary W, Pham M, Hendrix K, White J, Nelson H, Deng P, Anderson JS, Fink K, Nolta J. A novel Huntington's disease mouse model to assess the role of neuroinflammation on disease progression and to develop human cell therapies. Stem Cells Transl Med 2021; 10:1033-1043. [PMID: 33710799 PMCID: PMC8235129 DOI: 10.1002/sctm.20-0431] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 01/08/2021] [Accepted: 02/13/2021] [Indexed: 02/06/2023] Open
Abstract
Huntington's disease (HD) is a fatal autosomal-dominant neurodegenerative disease caused by a trinucleotide CAG repeat expansion of the huntingtin gene (HTT) that affects 1 in every 10 000 individuals in the United States. Our lab developed a novel immune deficient HD mouse strain, the YACNSG, from a commonly used line, the YAC128 mouse, to enable transplantation studies using engineered human cells in addition to studying the impact of the immune system on disease progression. The primary goal of this project was to characterize this novel immune deQficient HD mouse model, using behavioral assays and histology to compare this new model to the immune competent YAC128 and immune deficient mice that had engraftment of a human immune system. Flow cytometry was used to confirm that the YACNSG strain lacked immune cells, and in vivo imaging was used to assess human mesenchymal stem/stromal cell (MSC) retention compared with a commonly used immune deficient line, the NSG mouse. We found that YACNSG were able to retain human MSCs longer than the immune competent YAC128 mice. We performed behavioral assessments starting at 4 months of age and continued testing monthly until 12 months on the accelerod and in the open field. At 12 months, brains were isolated and evaluated using immunohistochemistry for striatal volume. Results from these studies suggest that the novel immune deficient YACNSG strain of mice could provide a good model for human stem-cell based therapies and that the immune system appears to play an important role in the pathology of HD.
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Affiliation(s)
- Heather Dahlenburg
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
| | - David Cameron
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
- Department of NeurologyUniversity of California Davis HealthSacramentoCaliforniaUSA
| | - Sheng Yang
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
| | - Angelica Bachman
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
| | - Kari Pollock
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
| | - Whitney Cary
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
| | - Missy Pham
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
| | - Kyle Hendrix
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
| | - Jeannine White
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
| | - Haley Nelson
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
| | - Peter Deng
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
- Department of NeurologyUniversity of California Davis HealthSacramentoCaliforniaUSA
| | - Joseph S. Anderson
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
| | - Kyle Fink
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
- Department of NeurologyUniversity of California Davis HealthSacramentoCaliforniaUSA
| | - Jan Nolta
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
- Department of Internal MedicineUniversity of California Davis HealthSacramentoCaliforniaUSA
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7
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Adhikari A, Copping NA, Beegle J, Cameron DL, Deng P, O'Geen H, Segal DJ, Fink KD, Silverman JL, Anderson JS. Functional rescue in an Angelman syndrome model following treatment with lentivector transduced hematopoietic stem cells. Hum Mol Genet 2021; 30:1067-1083. [PMID: 33856035 PMCID: PMC8188406 DOI: 10.1093/hmg/ddab104] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 03/31/2021] [Accepted: 04/01/2021] [Indexed: 12/14/2022] Open
Abstract
Angelman syndrome (AS) is a rare neurodevelopmental disorder characterized by impaired communication skills, ataxia, motor and balance deficits, intellectual disabilities, and seizures. The genetic cause of AS is the neuronal loss of UBE3A expression in the brain. A novel approach, described here, is a stem cell gene therapy which uses lentivector-transduced hematopoietic stem and progenitor cells to deliver functional UBE3A to affected cells. We have demonstrated both the prevention and reversal of AS phenotypes upon transplantation and engraftment of human CD34+ cells transduced with a Ube3a lentivector in a novel immunodeficient Ube3amat−/pat+ IL2rg−/y mouse model of AS. A significant improvement in motor and cognitive behavioral assays as well as normalized delta power measured by electroencephalogram was observed in neonates and adults transplanted with the gene modified cells. Human hematopoietic profiles observed in the lymphoid organs by detection of human immune cells were normal. Expression of UBE3A was detected in the brains of the adult treatment group following immunohistochemical staining illustrating engraftment of the gene-modified cells expressing UBE3A in the brain. As demonstrated with our data, this stem cell gene therapy approach offers a promising treatment strategy for AS, not requiring a critical treatment window.
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Affiliation(s)
- Anna Adhikari
- Department of Psychiatry and Behavioral Sciences, MIND Institute, University of California Davis School of Medicine, Sacramento, CA 95817, USA
| | - Nycole A Copping
- Department of Psychiatry and Behavioral Sciences, MIND Institute, University of California Davis School of Medicine, Sacramento, CA 95817, USA
| | - Julie Beegle
- Stem Cell Program, Department of Internal Medicine, University of California Davis School of Medicine, Sacramento, CA 95817, USA
| | - David L Cameron
- Stem Cell Program, Department of Neurology, Institute for Regenerative Cures, University of California Davis School of Medicine, Sacramento, CA 95817, USA
| | - Peter Deng
- Stem Cell Program, Department of Neurology, Institute for Regenerative Cures, University of California Davis School of Medicine, Sacramento, CA 95817, USA
| | - Henriette O'Geen
- Department of Biochemistry and Medical Microbiology, UC Davis Genome Center, University of California Davis School of Medicine, Davis, CA 95616, USA
| | - David J Segal
- Department of Biochemistry and Medical Microbiology, UC Davis Genome Center, University of California Davis School of Medicine, Davis, CA 95616, USA
| | - Kyle D Fink
- Stem Cell Program, Department of Neurology, Institute for Regenerative Cures, University of California Davis School of Medicine, Sacramento, CA 95817, USA
| | - Jill L Silverman
- Department of Psychiatry and Behavioral Sciences, MIND Institute, University of California Davis School of Medicine, Sacramento, CA 95817, USA
| | - Joseph S Anderson
- Stem Cell Program, Department of Internal Medicine, University of California Davis School of Medicine, Sacramento, CA 95817, USA
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8
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Human TRIM5α: Autophagy Connects Cell-Intrinsic HIV-1 Restriction and Innate Immune Sensor Functioning. Viruses 2021; 13:v13020320. [PMID: 33669846 PMCID: PMC7923229 DOI: 10.3390/v13020320] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 02/12/2021] [Accepted: 02/13/2021] [Indexed: 12/12/2022] Open
Abstract
Human immunodeficiency virus-1 (HIV-1) persists as a global health concern, with an incidence rate of approximately 2 million, and estimated global prevalence of over 35 million. Combination antiretroviral treatment is highly effective, but HIV-1 patients that have been treated still suffer from chronic inflammation and residual viral replication. It is therefore paramount to identify therapeutically efficacious strategies to eradicate viral reservoirs and ultimately develop a cure for HIV-1. It has been long accepted that the restriction factor tripartite motif protein 5 isoform alpha (TRIM5α) restricts HIV-1 infection in a species-specific manner, with rhesus macaque TRIM5α strongly restricting HIV-1, and human TRIM5α having a minimal restriction capacity. However, several recent studies underscore human TRIM5α as a cell-dependent HIV-1 restriction factor. Here, we present an overview of the latest research on human TRIM5α and propose a novel conceptualization of TRIM5α as a restriction factor with a varied portfolio of antiviral functions, including mediating HIV-1 degradation through autophagy- and proteasome-mediated mechanisms, and acting as a viral sensor and effector of antiviral signaling. We have also expanded on the protective antiviral roles of autophagy and outline the therapeutic potential of autophagy modulation to intervene in chronic HIV-1 infection.
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9
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Cornu TI, Mussolino C, Müller MC, Wehr C, Kern WV, Cathomen T. HIV Gene Therapy: An Update. Hum Gene Ther 2021; 32:52-65. [PMID: 33349126 DOI: 10.1089/hum.2020.159] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Progress in antiretroviral therapy has considerably reduced mortality and notably improved the quality of life of individuals infected with HIV since the pandemic began some 40 years ago. However, drug resistance, treatment-associated toxicity, adherence to medication, and the need for lifelong therapy have remained major challenges. While the development of an HIV vaccine has remained elusive, considerable progress in developing innovative cell and gene therapies to treat HIV infection has been made. This includes immune cell therapies, such as chimeric antigen receptor T cells to target HIV infected cells, as well as gene therapies and genome editing strategies to render the patient's immune system resistant to HIV. Nonetheless, all of these attempts to achieve a functional cure in HIV patients have failed thus far. This review introduces the clinical as well as the technical challenges of treating HIV infection, and summarizes the most promising cell and gene therapy concepts that have aspired to bring about functional cure for people living with HIV. It further discusses socioeconomic aspects as well as future directions for developing cell and gene therapies with a potential to be an effective one-time treatment with minimal toxicity.
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Affiliation(s)
- Tatjana I Cornu
- Institute for Transfusion Medicine and Gene Therapy, Medical Center-University of Freiburg, Freiburg, Germany.,Center for Chronic Immunodeficiency, Medical Center-University of Freiburg, Freiburg, Germany.,Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Claudio Mussolino
- Institute for Transfusion Medicine and Gene Therapy, Medical Center-University of Freiburg, Freiburg, Germany.,Center for Chronic Immunodeficiency, Medical Center-University of Freiburg, Freiburg, Germany.,Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Matthias C Müller
- Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Division of Infectious Diseases, Department of Medicine II, Medical Center-University of Freiburg, Freiburg, Germany.,Department of Infection Medicine, Medical Care Center, MVZ Clotten, Freiburg, Germany
| | - Claudia Wehr
- Center for Chronic Immunodeficiency, Medical Center-University of Freiburg, Freiburg, Germany.,Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Department of Hematology, Oncology and Stem Cell Transplantation, Medical Center-University of Freiburg, Freiburg, Germany
| | - Winfried V Kern
- Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Division of Infectious Diseases, Department of Medicine II, Medical Center-University of Freiburg, Freiburg, Germany
| | - Toni Cathomen
- Institute for Transfusion Medicine and Gene Therapy, Medical Center-University of Freiburg, Freiburg, Germany.,Center for Chronic Immunodeficiency, Medical Center-University of Freiburg, Freiburg, Germany.,Faculty of Medicine, University of Freiburg, Freiburg, Germany
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10
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Désaulniers K, Ortiz L, Dufour C, Claudel A, Plourde MB, Merindol N, Berthoux L. Editing of the TRIM5 Gene Decreases the Permissiveness of Human T Lymphocytic Cells to HIV-1. Viruses 2020; 13:E24. [PMID: 33375604 PMCID: PMC7824555 DOI: 10.3390/v13010024] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Revised: 12/20/2020] [Accepted: 12/22/2020] [Indexed: 01/08/2023] Open
Abstract
Tripartite-motif-containing protein 5 isoform α (TRIM5α) is a cytoplasmic antiretroviral effector upregulated by type I interferons (IFN-I). We previously showed that two points mutations, R332G/R335G, in the retroviral capsid-binding region confer human TRIM5α the capacity to target and strongly restrict HIV-1 upon overexpression of the mutated protein. Here, we used clustered regularly interspaced short palindromic repeats (CRISPR)-Cas9-mediated homology-directed repair (HDR) to introduce these two mutations in the endogenous human TRIM5 gene. We found 6 out of 47 isolated cell clones containing at least one HDR-edited allele. One clone (clone 6) had both alleles containing R332G, but only one of the two alleles containing R335G. Upon challenge with an HIV-1 vector, clone 6 was significantly less permissive compared to unmodified cells, whereas the cell clones with monoallelic modifications were only slightly less permissive. Following interferon (IFN)-β treatment, inhibition of HIV-1 infection in clone 6 was significantly enhanced (~40-fold inhibition). TRIM5α knockdown confirmed that HIV-1 was inhibited by the edited TRIM5 gene products. Quantification of HIV-1 reverse transcription products showed that inhibition occurred through the expected mechanism. In conclusion, we demonstrate the feasibility of potently inhibiting a viral infection through the editing of innate effector genes. Our results also emphasize the importance of biallelic modification in order to reach significant levels of inhibition by TRIM5α.
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Affiliation(s)
| | | | | | | | | | | | - Lionel Berthoux
- Department of Medical Biology, Université du Québec à Trois-Rivières, Trois-Rivières, QC G9A 5H7, Canada; (K.D.); (L.O.); (C.D.); (A.C.); (M.B.P.); (N.M.)
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11
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Brendel C, Rio P, Verhoeyen E. Humanized mice are precious tools for evaluation of hematopoietic gene therapies and preclinical modeling to move towards a clinical trial. Biochem Pharmacol 2019; 174:113711. [PMID: 31726047 DOI: 10.1016/j.bcp.2019.113711] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Accepted: 11/07/2019] [Indexed: 12/11/2022]
Abstract
Over the last decade, incrementally improved xenograft mouse models, which support the engraftment and development of a human hemato-lymphoid system, have been developed and represent an important fundamental and preclinical research tool. Immunodeficient mice can be transplanted with human hematopoietic stem cells (HSCs) and this process is accompanied by HSC homing to the murine bone marrow. This is followed by stem cell expansion, multilineage hematopoiesis, long-term engraftment, and functional human antibody and cellular immune responses. The most significant contributions made by these humanized mice are the identification of normal and leukemic hematopoietic stem cells, the characterization of the human hematopoietic hierarchy, screening of anti-cancer therapies and their use as preclinical models for gene therapy applications. This review article focuses on several gene therapy applications that have benefited from evaluation in humanized mice such as chimeric antigen receptor (CAR) T cell therapies for cancer, anti-viral therapies and gene therapies for multiple monogenetic diseases. Humanized mouse models have been and still are of great value for the gene therapy field since they provide a more reliable understanding of sometimes complicated therapeutic approaches such as recently developed therapeutic gene editing strategies, which seek to correct a gene at its endogenous genomic locus. Additionally, humanized mouse models, which are of great importance with regard to testing new vector technologies in vivo for assessing safety and efficacy prior toclinical trials, help to expedite the critical translation from basic findings to clinical applications. In this review, innovative gene therapies and preclinical studies to evaluate T- and B-cell and HSC-based therapies in humanized mice are discussed and illustrated by multiple examples.
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Affiliation(s)
- Christian Brendel
- Dana-Farber/Boston Children's Cancer and Blood Disorders Center, Harvard Medical School, Boston, MA, USA
| | - Paula Rio
- Division of Hematopoietic Innovative Therapies, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Investigaciones Sanitarias Fundación Jiménez Díaz (IIS-FJD), Madrid, Spain
| | - Els Verhoeyen
- CIRI, Université de Lyon, INSERM U1111, ENS de Lyon, Université Lyon1, CNRS, UMR 5308, 69007 Lyon, France; Université Côte d'Azur, INSERM, C3M, 06204 Nice, France.
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12
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Effects of intravitreal injection of human CD34 + bone marrow stem cells in a murine model of diabetic retinopathy. Exp Eye Res 2019; 190:107865. [PMID: 31682846 DOI: 10.1016/j.exer.2019.107865] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 10/11/2019] [Accepted: 10/28/2019] [Indexed: 12/25/2022]
Abstract
Human CD34 + stem cells are mobilized from bone marrow to sites of tissue ischemia and play an important role in tissue revascularization. This study used a murine model to test the hypothesis that intravitreal injection of human CD34 + stem cells harvested from bone marrow (BMSCs) can have protective effects in eyes with diabetic retinopathy. Streptozotocin-induced diabetic mice (C57BL/6J) were used as a model for diabetic retinopathy. Subcutaneous implantation of Alzet pump, loaded with Tacrolimus and Rapamycin, 5 days prior to intravitreal injection provided continuous systemic immunosuppression for the study duration to avoid rejection of human cells. Human CD34 + BMSCs were harvested from the mononuclear cell fraction of bone marrow from a healthy donor using magnetic beads. The CD34 + cells were labeled with enhanced green fluorescent protein (EGFP) using a lentiviral vector. The right eye of each mouse received an intravitreal injection of 50,000 EGFP-labeled CD34 + BMSCs or phosphate buffered saline (PBS). Simultaneous multimodal in vivo retinal imaging system consisting of fluorescent scanning laser ophthalmoscopy (enabling fluorescein angiography), optical coherence tomography (OCT) and OCT angiography was used to confirm the development of diabetic retinopathy and study the in vivo migration of the EGFP-labeled CD34 + BMSCs in the vitreous and retina following intravitreal injection. After imaging, the mice were euthanized, and the eyes were removed for immunohistochemistry. In addition, microarray analysis of the retina and retinal flat mount analysis of retinal vasculature were performed. The development of retinal microvascular changes consistent with diabetic retinopathy was visualized using fluorescein angiography and OCT angiography between 5 and 6 months after induction of diabetes in all diabetic mice. These retinal microvascular changes include areas of capillary nonperfusion and late leakage of fluorescein dye. Multimodal in vivo imaging and immunohistochemistry identified EGFP-labeled cells in the superficial retina and along retinal vasculature at 1 and 4 weeks following intravitreal cell injection. Microarray analysis showed changes in expression of 162 murine retinal genes following intravitreal CD34 + BMSC injection when compared to PBS-injected control. The major molecular pathways affected by intravitreal CD34 + BMSC injection in the murine retina included pathways implicated in the pathogenesis of diabetic retinopathy including Toll-like receptor, MAP kinase, oxidative stress, cellular development, assembly and organization pathways. At 4 weeks following intravitreal injection, retinal flat mount analysis showed preservation of the retinal vasculature in eyes injected with CD34 + BMSCs when compared to PBS-injected control. The study findings support the hypothesis that intravitreal injection of human CD34 + BMSCs results in retinal homing and integration of these human cells with preservation of the retinal vasculature in murine eyes with diabetic retinopathy.
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13
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Ganser-Pornillos BK, Pornillos O. Restriction of HIV-1 and other retroviruses by TRIM5. Nat Rev Microbiol 2019; 17:546-556. [PMID: 31312031 DOI: 10.1038/s41579-019-0225-2] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/04/2019] [Indexed: 12/12/2022]
Abstract
Mammalian cells express a variety of innate immune proteins - known as restriction factors - which defend against invading retroviruses such as HIV-1. Two members of the tripartite motif protein family - TRIM5α and TRIMCyp - were identified in 2004 as restriction factors that recognize and inactivate the capsid shell that surrounds and protects the incoming retroviral core. Research on these TRIM5 proteins has uncovered a novel mode of non-self recognition that protects against cross-species transmission of retroviruses. Our developing understanding of the mechanism of TRIM5 restriction underscores the concept that core uncoating and reverse transcription of the viral genome are coordinated processes rather than discrete steps of the post-entry pathway of retrovirus replication. In this Review, we provide an overview of the current state of knowledge of the molecular mechanism of TRIM5-mediated restriction, highlight recent advances and discuss implications for the development of capsid-targeted antiviral therapeutics.
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Affiliation(s)
- Barbie K Ganser-Pornillos
- Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, VA, USA.
| | - Owen Pornillos
- Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, VA, USA.
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14
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Abstract
As the HIV pandemic rapidly spread worldwide in the 1980s and 1990s, a new approach to treat cancer, genetic diseases, and infectious diseases was also emerging. Cell and gene therapy strategies are connected with human pathologies at a fundamental level, by delivering DNA and RNA molecules that could correct and/or ameliorate the underlying genetic factors of any illness. The history of HIV gene therapy is especially intriguing, in that the virus that was targeted was soon co-opted to become part of the targeting strategy. Today, HIV-based lentiviral vectors, along with many other gene delivery strategies, have been used to evaluate HIV cure approaches in cell culture, small and large animal models, and in patients. Here, we trace HIV cell and gene therapy from the earliest clinical trials, using genetically unmodified cell products from the patient or from matched donors, through current state-of-the-art strategies. These include engineering HIV-specific immunity in T-cells, gene editing approaches to render all blood cells in the body HIV-resistant, and most importantly, combination therapies that draw from both of these respective "offensive" and "defensive" approaches. It is widely agreed upon that combinatorial approaches are the most promising route to functional cure/remission of HIV infection. This chapter outlines cell and gene therapy strategies that are poised to play an essential role in eradicating HIV-infected cells in vivo.
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15
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Weng Y, Xiao H, Zhang J, Liang XJ, Huang Y. RNAi therapeutic and its innovative biotechnological evolution. Biotechnol Adv 2019; 37:801-825. [PMID: 31034960 DOI: 10.1016/j.biotechadv.2019.04.012] [Citation(s) in RCA: 180] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Revised: 04/09/2019] [Accepted: 04/23/2019] [Indexed: 02/06/2023]
Abstract
Recently, United States Food and Drug Administration (FDA) and European Commission (EC) approved Alnylam Pharmaceuticals' RNA interference (RNAi) therapeutic, ONPATTRO™ (Patisiran), for the treatment of the polyneuropathy of hereditary transthyretin-mediated (hATTR) amyloidosis in adults. This is the first RNAi therapeutic all over the world, as well as the first FDA-approved treatment for this indication. As a milestone event in RNAi pharmaceutical industry, it means, for the first time, people have broken through all development processes for RNAi drugs from research to clinic. With this achievement, RNAi approval may soar in the coming years. In this paper, we introduce the basic information of ONPATTRO and the properties of RNAi and nucleic acid therapeutics, update the clinical and preclinical development activities, review its complicated development history, summarize the key technologies of RNAi at early stage, and discuss the latest advances in delivery and modification technologies. It provides a comprehensive view and biotechnological insights of RNAi therapy for the broader audiences.
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Affiliation(s)
- Yuhua Weng
- Advanced Research Institute of Multidisciplinary Science, School of Life Science, Key Laboratory of Molecular Medicine and Biotherapy, Beijing Institute of Technology, Beijing 100081, PR China
| | - Haihua Xiao
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China
| | - Jinchao Zhang
- College of Chemistry & Environmental Science, Chemical Biology Key Laboratory of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, PR China
| | - Xing-Jie Liang
- Chinese Academy of Sciences (CAS) Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, Beijing 100190, PR China
| | - Yuanyu Huang
- Advanced Research Institute of Multidisciplinary Science, School of Life Science, Key Laboratory of Molecular Medicine and Biotherapy, Beijing Institute of Technology, Beijing 100081, PR China.
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16
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Colomer-Lluch M, Ruiz A, Moris A, Prado JG. Restriction Factors: From Intrinsic Viral Restriction to Shaping Cellular Immunity Against HIV-1. Front Immunol 2018; 9:2876. [PMID: 30574147 PMCID: PMC6291751 DOI: 10.3389/fimmu.2018.02876] [Citation(s) in RCA: 111] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Accepted: 11/22/2018] [Indexed: 01/20/2023] Open
Abstract
Antiviral restriction factors are host cellular proteins that constitute a first line of defense blocking viral replication and propagation. In addition to interfering at critical steps of the viral replication cycle, some restriction factors also act as innate sensors triggering innate responses against infections. Accumulating evidence suggests an additional role for restriction factors in promoting antiviral cellular immunity to combat viruses. Here, we review the recent progress in our understanding on how restriction factors, particularly APOBEC3G, SAMHD1, Tetherin, and TRIM5α have the cell-autonomous potential to induce cellular resistance against HIV-1 while promoting antiviral innate and adaptive immune responses. Also, we provide an overview of how these restriction factors may connect with protein degradation pathways to modulate anti-HIV-1 cellular immune responses, and we summarize the potential of restriction factors-based therapeutics. This review brings a global perspective on the influence of restrictions factors in intrinsic, innate, and also adaptive antiviral immunity opening up novel research avenues for therapeutic strategies in the fields of drug discovery, gene therapy, and vaccines to control viral infections.
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Affiliation(s)
- Marta Colomer-Lluch
- IrsiCaixa AIDS Research Institute, Germans Trias i Pujol Research Institute, Universitat Autonoma de Barcelona, Badalona, Spain
| | - Alba Ruiz
- IrsiCaixa AIDS Research Institute, Germans Trias i Pujol Research Institute, Universitat Autonoma de Barcelona, Badalona, Spain
| | - Arnaud Moris
- Sorbonne Université, INSERM U1135, CNRS ERL 8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Julia G Prado
- IrsiCaixa AIDS Research Institute, Germans Trias i Pujol Research Institute, Universitat Autonoma de Barcelona, Badalona, Spain
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17
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Li Y, Zhang W, Zhao J, Li S, Shan L, Zhu J, Li Y, Zhu H, Mao Q, Xia H. Establishing a dual knock-out cell line by lentivirus based combined CRISPR/Cas9 and Loxp/Cre system. Cytotechnology 2018; 70:1595-1605. [PMID: 30173403 DOI: 10.1007/s10616-018-0252-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Accepted: 08/23/2018] [Indexed: 10/28/2022] Open
Abstract
The clustered regulatory interspersed short palindromic repeat (CRISPR)/CRISPR-associated protein (Cas) system has been widely used for gene knock-out. Lentiviral vectors have been commonly used as a delivery method for this system, however, prolonged Cas9/sgRNA expression due to lentiviral integration can lead to accumulating off-target mutations. To solve this issue in engineering a gene knock-out cell line, this study established a novel system, which was composed of two lentiviral vectors. One lentiviral vector carried simultaneously sgRNAs and CRISPR/Cas9 expression cassettes targeting single or multiple gene(s); the other lentiviral vector carried Cre that could remove excess sgRNAs and Cas9 expression cassettes in the genome after gene targeting was achieved. To prove the principle, two candidate genes, extracellular matrix protein 1 (ECM1) and progranulin (PGRN), both highly expressed in MDA-MB-231 cells, were selected for testing the novel system. A dual knock-out of ECM1 and PGRN was successfully achieved in MDA-MB-231 cell line, with the sgRNAs and Cas9 expression cassettes being removed by Cre. This system should have great potential in applications for multiple genes knock-out in vitro.
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Affiliation(s)
- Ya Li
- Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University, 199 South Chang'an Road, Xi'an, 710062, Shaanxi, People's Republic of China
| | - Weifeng Zhang
- Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University, 199 South Chang'an Road, Xi'an, 710062, Shaanxi, People's Republic of China
| | - Junli Zhao
- Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University, 199 South Chang'an Road, Xi'an, 710062, Shaanxi, People's Republic of China
| | - Sai Li
- Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University, 199 South Chang'an Road, Xi'an, 710062, Shaanxi, People's Republic of China
| | - Linlin Shan
- Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University, 199 South Chang'an Road, Xi'an, 710062, Shaanxi, People's Republic of China
| | - Jiuling Zhu
- Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University, 199 South Chang'an Road, Xi'an, 710062, Shaanxi, People's Republic of China
| | - Yan Li
- Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University, 199 South Chang'an Road, Xi'an, 710062, Shaanxi, People's Republic of China
| | - He Zhu
- Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University, 199 South Chang'an Road, Xi'an, 710062, Shaanxi, People's Republic of China
| | - Qinwen Mao
- Department of Pathology, Northwestern University Feinberg School of Medicine, 303 E. Chicago Avenue, Ward 3-140, Chicago, IL, 60611, USA
| | - Haibin Xia
- Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University, 199 South Chang'an Road, Xi'an, 710062, Shaanxi, People's Republic of China.
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18
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Omelchenko DO, Glazkova DV, Bogoslovskaya EV, Urusov FA, Zhogina YA, Tsyganova GM, Shipulin GA. Protection of Lymphocytes Against HIV using Lentivirus Vector Carrying a Combination of TRIM5α-HRH Genes and microRNA Against CCR5. Mol Biol 2018. [DOI: 10.1134/s0026893318020085] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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19
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Carrillo MA, Zhen A, Kitchen SG. The Use of the Humanized Mouse Model in Gene Therapy and Immunotherapy for HIV and Cancer. Front Immunol 2018; 9:746. [PMID: 29755454 PMCID: PMC5932400 DOI: 10.3389/fimmu.2018.00746] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2017] [Accepted: 03/26/2018] [Indexed: 12/31/2022] Open
Abstract
HIV and cancer remain prevailing sources of morbidity and mortality worldwide. There are current efforts to discover novel therapeutic strategies for the treatment or cure of these diseases. Humanized mouse models provide the investigative tool to study the interaction between HIV or cancer and the human immune system in vivo. These humanized models consist of immunodeficient mice transplanted with human cells, tissues, or hematopoietic stem cells that result in reconstitution with a nearly full human immune system. In this review, we discuss preclinical studies evaluating therapeutic approaches in stem cell-based gene therapy and T cell-based immunotherapies for HIV and cancer using a humanized mouse model and some recent advances in using checkpoint inhibitors to improve antiviral or antitumor responses.
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Affiliation(s)
- Mayra A Carrillo
- Department of Medicine, Division of Hematology and Oncology, University of California Los Angeles, Los Angeles, CA, United States
| | - Anjie Zhen
- Department of Medicine, Division of Hematology and Oncology, University of California Los Angeles, Los Angeles, CA, United States
| | - Scott G Kitchen
- Department of Medicine, Division of Hematology and Oncology, University of California Los Angeles, Los Angeles, CA, United States
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20
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Dufour C, Claudel A, Joubarne N, Merindol N, Maisonnet T, Masroori N, Plourde MB, Berthoux L. Editing of the human TRIM5 gene to introduce mutations with the potential to inhibit HIV-1. PLoS One 2018; 13:e0191709. [PMID: 29373607 PMCID: PMC5786314 DOI: 10.1371/journal.pone.0191709] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Accepted: 01/10/2018] [Indexed: 11/21/2022] Open
Abstract
The type I interferon (IFN-I)-inducible human restriction factor TRIM5α inhibits the infection of human cells by specific nonhuman retroviruses, such as N-MLV and EIAV, but does not generally target HIV-1. However, the introduction of two aminoacid substitutions, R332G and R355G, in the human TRIM5α (huTRIM5α) domain responsible for retroviral capsid recognition leads to efficient HIV-1 restriction upon stable over-expression. CRISPR-Cas-based approaches to precisely edit DNA could be employed to modify TRIM5 in human cells. Toward this aim, we used a DNA transfection-based CRISPR-Cas9 genome editing protocol to successfully mutate TRIM5 to its potentially HIV-1-restrictive version by homology-directed repair (HDR) in HEK293T cells. Nine clones bearing at least one HDR-edited TRIM5 allele containing both mutations were isolated (5.6% overall efficiency), whereas another one contained only the R332G mutation. Of concern, several of these HDR-edited clones contained on-target undesired mutations, and none had all the alleles corrected. Our study demonstrates the feasibility of editing the TRIM5 gene in human cells and identifies the main challenges to be addressed in order to use this approach to confer protection from HIV-1.
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Affiliation(s)
- Caroline Dufour
- Laboratory of Antiviral Immunity, Department of Medical Biology, Université du Québec à Trois-Rivières, Trois-Rivières, Québec, Canada
| | - Alix Claudel
- Laboratory of Antiviral Immunity, Department of Medical Biology, Université du Québec à Trois-Rivières, Trois-Rivières, Québec, Canada
| | - Nicolas Joubarne
- Laboratory of Antiviral Immunity, Department of Medical Biology, Université du Québec à Trois-Rivières, Trois-Rivières, Québec, Canada
| | - Natacha Merindol
- Laboratory of Antiviral Immunity, Department of Medical Biology, Université du Québec à Trois-Rivières, Trois-Rivières, Québec, Canada
| | - Tara Maisonnet
- Laboratory of Antiviral Immunity, Department of Medical Biology, Université du Québec à Trois-Rivières, Trois-Rivières, Québec, Canada
| | - Nasser Masroori
- Laboratory of Antiviral Immunity, Department of Medical Biology, Université du Québec à Trois-Rivières, Trois-Rivières, Québec, Canada
| | - Mélodie B. Plourde
- Laboratory of Antiviral Immunity, Department of Medical Biology, Université du Québec à Trois-Rivières, Trois-Rivières, Québec, Canada
| | - Lionel Berthoux
- Laboratory of Antiviral Immunity, Department of Medical Biology, Université du Québec à Trois-Rivières, Trois-Rivières, Québec, Canada
- * E-mail:
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21
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Scarborough RJ, Gatignol A. RNA Interference Therapies for an HIV-1 Functional Cure. Viruses 2017; 10:E8. [PMID: 29280961 PMCID: PMC5795421 DOI: 10.3390/v10010008] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 12/20/2017] [Accepted: 12/22/2017] [Indexed: 12/31/2022] Open
Abstract
HIV-1 drug therapies can prevent disease progression but cannot eliminate HIV-1 viruses from an infected individual. While there is hope that elimination of HIV-1 can be achieved, several approaches to reach a functional cure (control of HIV-1 replication in the absence of drug therapy) are also under investigation. One of these approaches is the transplant of HIV-1 resistant cells expressing anti-HIV-1 RNAs, proteins or peptides. Small RNAs that use RNA interference pathways to target HIV-1 replication have emerged as competitive candidates for cell transplant therapy and have been included in all gene combinations that have so far entered clinical trials. Here, we review RNA interference pathways in mammalian cells and the design of therapeutic small RNAs that use these pathways to target pathogenic RNA sequences. Studies that have been performed to identify anti-HIV-1 RNA interference therapeutics are also reviewed and perspectives on their use in combination gene therapy to functionally cure HIV-1 infection are provided.
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Affiliation(s)
- Robert J Scarborough
- Lady Davis Institute for Medical Research, Montreal, QC H3T 1E2, Canada.
- Department of Microbiology and Immunology, McGill University, Montreal, QC H3A0G4, Canada.
| | - Anne Gatignol
- Lady Davis Institute for Medical Research, Montreal, QC H3T 1E2, Canada.
- Department of Microbiology and Immunology, McGill University, Montreal, QC H3A0G4, Canada.
- Department of Medicine, Division of Experimental Medicine, McGill University, Montreal, QC H3A0G4, Canada.
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22
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Khamaikawin W, Shimizu S, Kamata M, Cortado R, Jung Y, Lam J, Wen J, Kim P, Xie Y, Kim S, Arokium H, Presson AP, Chen ISY, An DS. Modeling Anti-HIV-1 HSPC-Based Gene Therapy in Humanized Mice Previously Infected with HIV-1. MOLECULAR THERAPY-METHODS & CLINICAL DEVELOPMENT 2017; 9:23-32. [PMID: 29322065 PMCID: PMC5751878 DOI: 10.1016/j.omtm.2017.11.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2017] [Accepted: 11/26/2017] [Indexed: 01/09/2023]
Abstract
Investigations of anti-HIV-1 human hematopoietic stem/progenitor cell (HSPC)-based gene therapy have been performed by HIV-1 challenge after the engraftment of gene-modified HSPCs in humanized mouse models. However, the clinical application of gene therapy is to treat HIV-1-infected patients. Here, we developed a new method to investigate an anti-HIV-1 HSPC-based gene therapy in humanized mice previously infected with HIV-1. First, humanized mice were infected with HIV-1. When plasma viremia reached >107 copies/mL 3 weeks after HIV-1 infection, the mice were myeloablated with busulfan and transplanted with anti-HIV-1 gene-modified CD34+ HSPCs transduced with a lentiviral vector expressing two short hairpin RNAs (shRNAs) against CCR5 and HIV-1 long terminal repeat (LTR), along with human thymus tissue under the kidney capsule. Anti-HIV-1 vector-modified human CD34+ HSPCs successfully repopulated peripheral blood and lymphoid tissues in HIV-1 previously infected humanized mice. Anti-HIV-1 shRNA vector-modified CD4+ T lymphocytes showed selective advantage in HIV-1 previously infected humanized mice. This new method will be useful for investigations of anti-HIV-1 gene therapy when testing in a more clinically relevant experimental setting.
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Affiliation(s)
- Wannisa Khamaikawin
- School of Nursing, University of California, Los Angeles, Los Angeles, CA 90095, USA.,UCLA AIDS Institute, Los Angeles, CA 90095, USA
| | - Saki Shimizu
- Division of Hematology-Oncology, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA.,School of Nursing, University of California, Los Angeles, Los Angeles, CA 90095, USA.,UCLA AIDS Institute, Los Angeles, CA 90095, USA
| | - Masakazu Kamata
- Division of Hematology-Oncology, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA
| | - Ruth Cortado
- School of Nursing, University of California, Los Angeles, Los Angeles, CA 90095, USA.,UCLA AIDS Institute, Los Angeles, CA 90095, USA
| | - Yujin Jung
- School of Nursing, University of California, Los Angeles, Los Angeles, CA 90095, USA.,UCLA AIDS Institute, Los Angeles, CA 90095, USA
| | - Jennifer Lam
- School of Nursing, University of California, Los Angeles, Los Angeles, CA 90095, USA.,UCLA AIDS Institute, Los Angeles, CA 90095, USA
| | - Jing Wen
- Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, Los Angeles, CA 90095, USA.,UCLA AIDS Institute, Los Angeles, CA 90095, USA
| | - Patrick Kim
- Division of Hematology-Oncology, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA.,School of Nursing, University of California, Los Angeles, Los Angeles, CA 90095, USA.,Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, Los Angeles, CA 90095, USA.,UCLA AIDS Institute, Los Angeles, CA 90095, USA
| | - Yiming Xie
- Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, Los Angeles, CA 90095, USA.,UCLA AIDS Institute, Los Angeles, CA 90095, USA
| | - Sanggu Kim
- Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, Los Angeles, CA 90095, USA.,UCLA AIDS Institute, Los Angeles, CA 90095, USA
| | - Hubert Arokium
- Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, Los Angeles, CA 90095, USA.,UCLA AIDS Institute, Los Angeles, CA 90095, USA
| | - Angela P Presson
- Department of Biostatistics, University of California, Los Angeles, Los Angeles, CA 90095, USA.,Division of Epidemiology, University of Utah, Salt Lake City, UT 84132, USA
| | - Irvin S Y Chen
- Division of Hematology-Oncology, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA.,Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, Los Angeles, CA 90095, USA.,UCLA AIDS Institute, Los Angeles, CA 90095, USA
| | - Dong Sung An
- Division of Hematology-Oncology, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA.,School of Nursing, University of California, Los Angeles, Los Angeles, CA 90095, USA.,UCLA AIDS Institute, Los Angeles, CA 90095, USA
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23
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Zhao N, Wang G, Das AT, Berkhout B. Combinatorial CRISPR-Cas9 and RNA Interference Attack on HIV-1 DNA and RNA Can Lead to Cross-Resistance. Antimicrob Agents Chemother 2017; 61:e01486-17. [PMID: 28893790 PMCID: PMC5700367 DOI: 10.1128/aac.01486-17] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 09/02/2017] [Indexed: 11/20/2022] Open
Abstract
Many potent antiviral drugs have been developed against HIV-1, and their combined action is usually successful in achieving durable virus suppression in infected individuals. This success is based on two effects: additive or even synergistic virus inhibition and an increase in the genetic threshold for development of drug resistance. More recently, several genetic approaches have been developed to attack the HIV-1 genome in a gene therapy setting. We set out to test the combinatorial possibilities for a therapy based on the CRISPR-Cas9 and RNA interference (RNAi) mechanisms that attack the viral DNA and RNA, respectively. When two different sites in the HIV-1 genome were targeted, either with dual CRISPR-Cas9 antivirals or with a combination of CRISPR-Cas9 and RNAi antivirals, we observed additive inhibition, much like what was reported for antiviral drugs. However, when the same or overlapping viral sequence was attacked by the antivirals, rapid escape from a CRISPR-Cas9 antiviral, assisted by the error-prone nonhomologous end joining (NHEJ) DNA repair machinery, accelerated the development of cross-resistance to the other CRISPR-Cas9 or RNAi antiviral. Thus, genetic antiviral approaches can be combined, but overlap should be avoided.
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MESH Headings
- Antiviral Agents/chemistry
- Antiviral Agents/metabolism
- Bacterial Proteins/genetics
- Bacterial Proteins/metabolism
- Base Sequence
- CRISPR-Associated Protein 9
- CRISPR-Cas Systems
- Cell Line, Transformed
- DNA, Viral/antagonists & inhibitors
- DNA, Viral/biosynthesis
- DNA, Viral/genetics
- Drug Resistance, Viral/genetics
- Endonucleases/genetics
- Endonucleases/metabolism
- Gene Expression Regulation, Viral
- Genome, Viral
- HIV Core Protein p24/antagonists & inhibitors
- HIV Core Protein p24/biosynthesis
- HIV Core Protein p24/genetics
- HIV-1/genetics
- HIV-1/metabolism
- Humans
- Molecular Targeted Therapy
- RNA Interference
- RNA, Guide, CRISPR-Cas Systems/genetics
- RNA, Guide, CRISPR-Cas Systems/metabolism
- RNA, Small Interfering/genetics
- RNA, Small Interfering/metabolism
- RNA, Viral/antagonists & inhibitors
- RNA, Viral/biosynthesis
- RNA, Viral/genetics
- T-Lymphocytes/virology
- Virus Replication
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Affiliation(s)
- Na Zhao
- Laboratory of Experimental Virology, Department of Medical Microbiology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Gang Wang
- Laboratory of Experimental Virology, Department of Medical Microbiology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Atze T Das
- Laboratory of Experimental Virology, Department of Medical Microbiology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Ben Berkhout
- Laboratory of Experimental Virology, Department of Medical Microbiology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
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Weatherley DAV, Boswell MT, Rowland-Jones SL. Targeting TRIM5α in HIV Cure Strategies for the CRISPR-Cas9 Era. Front Immunol 2017; 8:1616. [PMID: 29213273 PMCID: PMC5702620 DOI: 10.3389/fimmu.2017.01616] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Accepted: 11/08/2017] [Indexed: 12/24/2022] Open
Abstract
In the past decade, studies of innate immune activity against HIV-1 and other retroviruses have revealed a powerful array of host factors that can attack the virus at various stages of its life cycle in human and primate cells, raising the prospect that these antiviral factors could be manipulated in immunotherapeutic strategies for HIV infection. This has not proved straightforward: while HIV accessory genes encode proteins that subvert or destroy many of these restriction factors, others, such as human TRIM5α show limited potency against HIV-1. However, HIV-1 is much more susceptible to simian versions of TRIM5α: could this information be translated into the development of an effective gene therapy for HIV infection? Reigniting research into the restriction factor TRIM5α in the era of superior gene editing technology such as CRISPR-Cas9 presents an exciting opportunity to revisit this prospect.
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25
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Kwarteng A, Ahuno ST, Kwakye-Nuako G. The therapeutic landscape of HIV-1 via genome editing. AIDS Res Ther 2017; 14:32. [PMID: 28705213 PMCID: PMC5513397 DOI: 10.1186/s12981-017-0157-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2017] [Accepted: 05/30/2017] [Indexed: 12/31/2022] Open
Abstract
Current treatment for HIV-1 largely relies on chemotherapy through the administration of antiretroviral drugs. While the search for anti-HIV-1 vaccine remain elusive, the use of highly active antiretroviral therapies (HAART) have been far-reaching and has changed HIV-1 into a manageable chronic infection. There is compelling evidence, including several side-effects of ARTs, suggesting that eradication of HIV-1 cannot depend solely on antiretrovirals. Gene therapy, an expanding treatment strategy, using RNA interference (RNAi) and programmable nucleases such as meganuclease, zinc finger nuclease (ZFN), transcription activator-like effector nuclease (TALEN), and clustered regularly interspaced short palindromic repeats/CRISPR-associated proteins (CRISPR-Cas9) are transforming the therapeutic landscape of HIV-1. TALENS and ZFNS are structurally similar modular systems, which consist of a FokI endonuclease fused to custom-designed effector proteins but have been largely limited, particularly ZFNs, due to their complexity and cost of protein engineering. However, the newly developed CRISPR-Cas9 system, consists of a single guide RNA (sgRNA), which directs a Cas9 endonuclease to complementary target sites, and serves as a superior alternative to the previous protein-based systems. The techniques have been successfully applied to the development of better HIV-1 models, generation of protective mutations in endogenous/host cells, disruption of HIV-1 genomes and even reactivating latent viruses for better detection and clearance by host immune response. Here, we focus on gene editing-based HIV-1 treatment and research in addition to providing perspectives for refining these techniques.
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Affiliation(s)
- Alexander Kwarteng
- Department of Biochemistry and Biotechnology, Kwame Nkrumah University of Science and Technology (KNUST), PMB, Kumasi, Ghana
- Kumasi Centre for Collaborative Research in Tropical Medicine (KCCR), Kumasi, Ghana
| | - Samuel Terkper Ahuno
- Department of Biochemistry and Biotechnology, Kwame Nkrumah University of Science and Technology (KNUST), PMB, Kumasi, Ghana
| | - Godwin Kwakye-Nuako
- Department of Biomedical Sciences, School of Allied Health Sciences, College of Health and Allied Sciences, University of Cape Coast, Cape Coast, Ghana
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Moisseiev E, Smit-McBride Z, Oltjen S, Zhang P, Zawadzki RJ, Motta M, Murphy CJ, Cary W, Annett G, Nolta JA, Park SS. Intravitreal Administration of Human Bone Marrow CD34+ Stem Cells in a Murine Model of Retinal Degeneration. Invest Ophthalmol Vis Sci 2017; 57:4125-35. [PMID: 27537262 PMCID: PMC6733500 DOI: 10.1167/iovs.16-19252] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Purpose Intravitreal murine lineage-negative bone marrow (BM) hematopoietic cells slow down retinal degeneration. Because human BM CD34+ hematopoietic cells are not precisely comparable to murine cells, this study examined the effect of intravitreal human BM CD34+ cells on the degenerating retina using a murine model. Methods C3H/HeJrd1/rd1 mice, immunosuppressed systemically with tacrolimus and rapamycin, were injected intravitreally with PBS (n = 16) or CD34+ cells (n = 16) isolated from human BM using a magnetic cell sorter and labeled with enhanced green fluorescent protein (EGFP). After 1 and 4 weeks, the injected eyes were imaged with scanning laser ophthalmoscopy (SLO)/optical coherence tomography (OCT) and tested with electroretinography (ERG). Eyes were harvested after euthanasia for immunohistochemical and microarray analysis of the retina. Results In vivo SLO fundus imaging visualized EGFP-labeled cells within the eyes following intravitreal injection. Simultaneous OCT analysis localized the EGFP-labeled cells on the retinal surface resulting in a saw-toothed appearance. Immunohistochemical analysis of the retina identified EGFP-labeled cells on the retinal surface and adjacent to ganglion cells. Electroretinography testing showed a flat signal both at 1 and 4 weeks following injection in all eyes. Microarray analysis of the retina following cell injection showed altered expression of more than 300 mouse genes, predominantly those regulating photoreceptor function and maintenance and apoptosis. Conclusions Intravitreal human BM CD34+ cells rapidly home to the degenerating retinal surface. Although a functional benefit of this cell therapy was not seen on ERG in this rapidly progressive retinal degeneration model, molecular changes in the retina associated with CD34+ cell therapy suggest potential trophic regenerative effects that warrant further exploration.
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Affiliation(s)
- Elad Moisseiev
- Department of Ophthalmology & Vision Science University of California Davis Eye Center, Sacramento, California, United States 2Department of Ophthalmology, Tel Aviv Medical Center, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Zeljka Smit-McBride
- Vitreoretinal Research Laboratory, University of California Davis Department of Ophthalmology, University of California, Davis, California, United States
| | - Sharon Oltjen
- Vitreoretinal Research Laboratory, University of California Davis Department of Ophthalmology, University of California, Davis, California, United States
| | - Pengfei Zhang
- University of California Davis Research Investments in the Sciences and Engineering (RISE) Eye-Pod Laboratory, Department of Cell Biology and Human Anatomy, University of California, Davis, California, United States
| | - Robert J Zawadzki
- Department of Ophthalmology & Vision Science University of California Davis Eye Center, Sacramento, California, United States 4University of California Davis Research Investments in the Sciences and Engineering (RISE) Eye-Pod Laboratory, Department of Cel
| | - Monica Motta
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, California, United States
| | - Christopher J Murphy
- Department of Ophthalmology & Vision Science University of California Davis Eye Center, Sacramento, California, United States 5Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, California, Un
| | - Whitney Cary
- Stem Cell Program, Institute for Regenerative Cures, University of California Davis Medical Center, Sacramento, California, United States
| | - Geralyn Annett
- Stem Cell Program, Institute for Regenerative Cures, University of California Davis Medical Center, Sacramento, California, United States
| | - Jan A Nolta
- Stem Cell Program, Institute for Regenerative Cures, University of California Davis Medical Center, Sacramento, California, United States
| | - Susanna S Park
- Department of Ophthalmology & Vision Science University of California Davis Eye Center, Sacramento, California, United States
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27
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Attacking HIV-1 RNA versus DNA by sequence-specific approaches: RNAi versus CRISPR-Cas. Biochem Soc Trans 2016; 44:1355-1365. [DOI: 10.1042/bst20160060] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 06/09/2016] [Accepted: 06/21/2016] [Indexed: 01/02/2023]
Abstract
Human immunodeficiency virus type 1 (HIV-1) infection can be effectively controlled by potent antiviral drugs, but this never results in a cure. The patient should therefore take these drugs for the rest of his/her life, which can cause drug-resistance and adverse effects. Therefore, more durable therapeutic strategies should be considered, such as a stable gene therapy to protect the target T cells against HIV-1 infection. The development of potent therapeutic regimens based on the RNA interference (RNAi) and clustered regularly interspaced short palindromic repeats (CRISPR-Cas) mechanisms will be described, which can be delivered by lentiviral vectors. These mechanisms attack different forms of the viral genome, the RNA and DNA, respectively, but both mechanisms act in a strictly sequence-specific manner. Early RNAi experiments demonstrated profound virus inhibition, but also indicated that viral escape is possible. Such therapy failure can be prevented by the design of a combinatorial RNAi attack on the virus and this gene therapy is currently being tested in a preclinical humanized mouse model. Recent CRISPR-Cas studies also document robust virus inhibition, but suggest a novel viral escape route that is induced by the cellular nonhomologous end joining DNA repair pathway, which is activated by CRISPR-Cas-induced DNA breaks. We will compare these two approaches for durable HIV-1 suppression and discuss the respective advantages and disadvantages. The potential for future clinical applications will be described.
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28
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Swamy MN, Wu H, Shankar P. Recent advances in RNAi-based strategies for therapy and prevention of HIV-1/AIDS. Adv Drug Deliv Rev 2016; 103:174-186. [PMID: 27013255 PMCID: PMC4935623 DOI: 10.1016/j.addr.2016.03.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 03/10/2016] [Accepted: 03/11/2016] [Indexed: 12/15/2022]
Abstract
RNA interference (RNAi) provides a powerful tool to silence specific gene expression and has been widely used to suppress host factors such as CCR5 and/or viral genes involved in HIV-1 replication. Newer nuclease-based gene-editing technologies, such as zinc finger nucleases (ZFN), transcription activator-like effector nucleases (TALEN) and the clustered regularly interspaced short palindromic repeats (CRISPR)/Cas9 system, also provide powerful tools to ablate specific genes. Because of differences in co-receptor usage and the high mutability of the HIV-1 genome, a combination of host factors and viral genes needs to be suppressed for effective prevention and treatment of HIV-1 infection. Whereas the continued presence of small interfering/short hairpin RNA (si/shRNA) mediators is needed for RNAi to be effective, the continued expression of nucleases in the gene-editing systems is undesirable. Thus, RNAi provides the only practical way for expression of multiple silencers in infected and uninfected cells, which is needed for effective prevention/treatment of infection. There have been several advances in the RNAi field in terms of si/shRNA design, targeted delivery to HIV-1 susceptible cells, and testing for efficacy in preclinical humanized mouse models. Here, we comprehensively review the latest advances in RNAi technology towards prevention and treatment of HIV-1.
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Affiliation(s)
- Manjunath N Swamy
- Center of Emphasis in Infectious Disease, Department of Biomedical Sciences, Paul L. Foster School of Medicine, Texas Tech University Health Sciences Center, El Paso, TX 79905, USA.
| | - Haoquan Wu
- Center of Emphasis in Infectious Disease, Department of Biomedical Sciences, Paul L. Foster School of Medicine, Texas Tech University Health Sciences Center, El Paso, TX 79905, USA
| | - Premlata Shankar
- Center of Emphasis in Infectious Disease, Department of Biomedical Sciences, Paul L. Foster School of Medicine, Texas Tech University Health Sciences Center, El Paso, TX 79905, USA.
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29
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Pernet O, Yadav SS, An DS. Stem cell-based therapies for HIV/AIDS. Adv Drug Deliv Rev 2016; 103:187-201. [PMID: 27151309 PMCID: PMC4935568 DOI: 10.1016/j.addr.2016.04.027] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Revised: 04/21/2016] [Accepted: 04/25/2016] [Indexed: 12/26/2022]
Abstract
One of the current focuses in HIV/AIDS research is to develop a novel therapeutic strategy that can provide a life-long remission of HIV/AIDS without daily drug treatment and, ultimately, a cure for HIV/AIDS. Hematopoietic stem cell-based anti-HIV gene therapy aims to reconstitute the patient immune system by transplantation of genetically engineered hematopoietic stem cells with anti-HIV genes. Hematopoietic stem cells can self-renew, proliferate and differentiate into mature immune cells. In theory, anti-HIV gene-modified hematopoietic stem cells can continuously provide HIV-resistant immune cells throughout the life of a patient. Therefore, hematopoietic stem cell-based anti-HIV gene therapy has a great potential to provide a life-long remission of HIV/AIDS by a single treatment. Here, we provide a comprehensive review of the recent progress of developing anti-HIV genes, genetic modification of hematopoietic stem progenitor cells, engraftment and reconstitution of anti-HIV gene-modified immune cells, HIV inhibition in in vitro and in vivo animal models, and in human clinical trials.
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Affiliation(s)
- Olivier Pernet
- School of Nursing, University of California Los Angeles, 188 BSRB, 615 Charles E. Young Dr. South, Los Angeles, CA 90095, USA; UCLA AIDS Institute, 188 BSRB, 615 Charles E. Young Dr. South, Los Angeles, CA 90095, USA.
| | - Swati Seth Yadav
- School of Nursing, University of California Los Angeles, 188 BSRB, 615 Charles E. Young Dr. South, Los Angeles, CA 90095, USA; UCLA AIDS Institute, 188 BSRB, 615 Charles E. Young Dr. South, Los Angeles, CA 90095, USA.
| | - Dong Sung An
- School of Nursing, University of California Los Angeles, 188 BSRB, 615 Charles E. Young Dr. South, Los Angeles, CA 90095, USA; UCLA AIDS Institute, 188 BSRB, 615 Charles E. Young Dr. South, Los Angeles, CA 90095, USA; Hematology-Oncology, The Department of Medicine, David Geffen School of Medicine at UCLA, 188 BSRB, 615 Charles E. Young Dr. South, Los Angeles, CA 90095, USA.
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30
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Chingwaru W, Glashoff RH, Vidmar J, Kapewangolo P, Sampson SL. Mammalian cell cultures as models for Mycobacterium tuberculosis-human immunodeficiency virus (HIV) interaction studies: A review. ASIAN PAC J TROP MED 2016; 9:832-838. [PMID: 27633294 DOI: 10.1016/j.apjtm.2016.07.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 06/16/2016] [Accepted: 07/01/2016] [Indexed: 10/21/2022] Open
Abstract
Mycobacterium tuberculosis and human immunodeficiency virus (HIV) co-infections have remained a major public health concern worldwide, particularly in Southern Africa. Yet our understanding of the molecular interactions between the pathogens has remained poor due to lack of suitable preclinical models for such studies. We reviewed the use, this far, of mammalian cell culture models in HIV-MTB interaction studies. Studies have described the use of primary human cell cultures, including (1) monocyte-derived macrophage (MDM) fractions of peripheral blood mononuclear cell (PBMC), alveolar macrophages (AM), (2) cell lines such as the monocyte-derived macrophage cell line (U937), T lymphocyte cell lines (CEMx174, ESAT-6-specific CD4(+) T-cells) and an alveolar epithelial cell line (A549) and (3) special models such as stem cells, three dimensional (3D) or organoid cell models (including a blood-brain barrier cell model) in HIV-MTB interaction studies. The use of cell cultures from other mammals, including: mouse cell lines [macrophage cell lines RAW 264.7 and J774.2, fibroblast cell lines (NIH 3T3, C3H clones), embryonic fibroblast cell lines and T-lymphoma cell lines (S1A.TB, TIMI.4 and R1.1)]; rat (T cells: Rat2, RGE, XC and HH16, and alveolar cells: NR8383) and primary guinea pigs derived AMs, in HIV-MTB studies is also described. Given the spectrum of the models available, cell cultures offer great potential for host-HIV-MTB interactions studies.
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Affiliation(s)
- Walter Chingwaru
- DST/NRF Centre of Excellence for Biomedical Tuberculosis Research/SAMRC Centre for Tuberculosis Research, Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa; Institute Ceres/Zavod Ceres, Lahovna 16, 3000 Celje, Slovenia; Department of Biological Sciences, Faculty of Science, Bindura University Science Education, P. Bag 1020, Bindura, Zimbabwe.
| | - Richard H Glashoff
- Division of Medical Virology, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa
| | - Jerneja Vidmar
- Institute Ceres/Zavod Ceres, Lahovna 16, 3000 Celje, Slovenia; Department of Biological Sciences, Faculty of Science, Bindura University Science Education, P. Bag 1020, Bindura, Zimbabwe; Department of Plastic and Reconstructive Surgery, University Medical Centre Maribor, Ljubljanska 5, 2000 Maribor, Slovenia
| | - Petrina Kapewangolo
- Department of Chemistry and Biochemistry, Faculty of Science, University of Namibia, Windhoek, Namibia
| | - Samantha L Sampson
- DST/NRF Centre of Excellence for Biomedical Tuberculosis Research/SAMRC Centre for Tuberculosis Research, Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa
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31
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Abstract
While highly active anti-retroviral therapy has greatly improved the lives of HIV-infected individuals, current treatments are unable to completely eradicate the virus. This is due to the presence of HIV latently infected cells which harbor transcriptionally silent HIV. Latent HIV does not replicate or produce viral proteins, thereby preventing efficient targeting by anti-retroviral drugs. Strategies to target the HIV latent reservoir include viral reactivation, enhancing host defense mechanisms, keeping latent HIV silent, and using gene therapy techniques to knock out or reactivate latent HIV. While research into each of these areas has yielded promising results, currently no one mechanism eradicates latent HIV. Instead, combinations of these approaches should be considered for a potential HIV functional cure.
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Affiliation(s)
- Daniele C Cary
- Departments of Medicine, Microbiology and Immunology, University of California at San Francisco, San Francisco, CA, USA
| | - B Matija Peterlin
- Departments of Medicine, Microbiology and Immunology, University of California at San Francisco, San Francisco, CA, USA
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32
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Peterson CW, Haworth KG, Burke BP, Polacino P, Norman KK, Adair JE, Hu SL, Bartlett JS, Symonds GP, Kiem HP. Multilineage polyclonal engraftment of Cal-1 gene-modified cells and in vivo selection after SHIV infection in a nonhuman primate model of AIDS. MOLECULAR THERAPY-METHODS & CLINICAL DEVELOPMENT 2016; 3:16007. [PMID: 26958575 PMCID: PMC4765711 DOI: 10.1038/mtm.2016.7] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Accepted: 11/08/2015] [Indexed: 12/11/2022]
Abstract
We have focused on gene therapy approaches to induce functional cure/remission of HIV-1 infection. Here, we evaluated the safety and efficacy of the clinical grade anti-HIV lentiviral vector, Cal-1, in pigtailed macaques (Macaca nemestrina). Cal-1 animals exhibit robust levels of gene marking in myeloid and lymphoid lineages without measurable adverse events, suggesting that Cal-1 transduction and autologous transplantation of hematopoietic stem cells are safe, and lead to long-term, multilineage engraftment following myeloablative conditioning. Ex vivo, CD4+ cells from transplanted animals undergo positive selection in the presence of simian/human immunodeficiency virus (SHIV). In vivo, Cal-1 gene-marked cells are evident in the peripheral blood and in HIV-relevant tissue sites such as the gastrointestinal tract. Positive selection for gene-marked cells is observed in blood and tissues following SHIV challenge, leading to maintenance of peripheral blood CD4+ T-cell counts in a normal range. Analysis of Cal-1 lentivirus integration sites confirms polyclonal engraftment of gene-marked cells. Following infection, a polyclonal, SHIV-resistant clonal repertoire is established. These findings offer strong preclinical evidence for safety and efficacy of Cal-1, present a new method for tracking protected cells over the course of virus-mediated selective pressure in vivo, and reveal previously unobserved dynamics of virus-dependent T-cell selection.
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Affiliation(s)
- Christopher W Peterson
- Clinical Research Division, Fred Hutchinson Cancer Research Center , Seattle, Washington, USA
| | - Kevin G Haworth
- Clinical Research Division, Fred Hutchinson Cancer Research Center , Seattle, Washington, USA
| | | | - Patricia Polacino
- Washington National Primate Research Center , Seattle, Washington, USA
| | - Krystin K Norman
- Clinical Research Division, Fred Hutchinson Cancer Research Center , Seattle, Washington, USA
| | - Jennifer E Adair
- Clinical Research Division, Fred Hutchinson Cancer Research Center , Seattle, Washington, USA
| | - Shiu-Lok Hu
- Washington National Primate Research Center, Seattle, Washington, USA; Department of Pharmaceutics, University of Washington, Seattle, Washington, USA
| | | | | | - Hans-Peter Kiem
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA; Department of Medicine, University of Washington, Seattle, Washington, USA
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33
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DiGiusto DL. Stem cell gene therapy for HIV: strategies to inhibit viral entry and replication. Curr HIV/AIDS Rep 2016; 12:79-87. [PMID: 25578054 DOI: 10.1007/s11904-014-0242-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Since the demonstration of a cure of an HIV+ patient with an allogeneic stem cell transplant using naturally HIV-resistant cells, significant interest in creating similar autologous products has fueled the development of a variety of "cell engineering" approaches to stem cell therapy for HIV. Among the more well-studied strategies is the inhibition of viral entry through disruption of expression of viral co-receptors or through competitive inhibitors of viral fusion with the cell membrane. Preclinical evaluation of these approaches often starts in vitro but ultimately is tested in animal models prior to clinical implementation. In this review, we trace the development of several key approaches (meganucleases, short hairpin RNA (shRNA), and fusion inhibitors) to modification of hematopoietic stem cells designed to impart resistance to HIV to their T-cell and monocytic progeny. The basic evolution of technologies through in vitro and in vivo testing is discussed as well as the pros and cons of each approach and how the addition of postentry inhibitors may enhance the overall antiviral efficacy of these approaches.
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Affiliation(s)
- David L DiGiusto
- Department of Stem Cell and Cell Therapeutic Operations, Stanford Hospital and Clinics, 300 Pasteur Drive, Stanford, CA, 94305, USA,
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34
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Barclay SL, Yang Y, Zhang S, Fong R, Barraza A, Nolta JA, Torbett BE, Abedi M, Bauer G, Anderson JS. Safety and efficacy of a tCD25 preselective combination anti-HIV lentiviral vector in human hematopoietic stem and progenitor cells. Stem Cells 2015; 33:870-9. [PMID: 25524029 DOI: 10.1002/stem.1919] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Accepted: 11/08/2014] [Indexed: 01/10/2023]
Abstract
The successful suppression of human immunodeficiency virus (HIV) in the "Berlin Patient" has highlighted the ability of HIV-resistant hematopoietic stem cells to offer a potential functional cure for HIV-infected patients. HIV stem cell gene therapy can mimic this result by genetically modifying a patient's own cells with anti-HIV genes. Previous attempts of HIV gene therapy have been hampered by a low percentage of transplanted HIV-resistant cells which has led to minimal clinical efficacy. In our current study, we have evaluated the in vitro and in vivo safety and efficacy of a truncated/mutated form of human CD25 preselective anti-HIV lentiviral vector in human hematopoietic stem cells. This preselective vector allows us to purify vector-transduced cells prior to transplantation so an increased percentage of gene-modified cells can be delivered. Here, we demonstrate the safety of this strategy with successful engraftment and multilineage hematopoiesis of transduced cells in a humanized NOD-RAG1-/-IL-2rγ-/- knockout mouse model. Efficacy was also demonstrated with significant protection from HIV-1 infection including maintenance of human CD4+ cell levels and a decrease in HIV-1 plasma viremia. Collectively, these results establish the utility of this HIV stem cell gene therapy strategy and bring it closer to providing a functional cure for HIV-infected patients.
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Affiliation(s)
- Sharlie L Barclay
- Department of Internal Medicine, University of California Davis, Sacramento, California, USA
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35
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Adaptation of HIV-1 to rhTrim5α-mediated restriction in vitro. Virology 2015; 486:239-47. [PMID: 26469551 DOI: 10.1016/j.virol.2015.09.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 08/25/2015] [Accepted: 09/24/2015] [Indexed: 11/22/2022]
Abstract
Recently, gene therapy with rhTrim5α, an innate restriction factor which blocks HIV-1 at a post entry step, have been shown to be applicable as treatment in vitro. However, HIV-1 might adapt to replicate in the presence of rhTrim5α due to its high mutation rate. Here we observed that two different HIV-1 isolates were able to replicate in cells expressing high levels of rhTrim5α. Escape mutations were found in the conserved regions of the viral genome, Gag and p51 RT subunit. Furthermore, the escape mutations, predominantly in the capsid and p51 RT, altered viral sensitivity to modified huTrim5α R332P and R335G variants, with only a minor effect on the replication capacity in primary PBMCs. Therefore, gene therapy with rhTrim5α might be suitable for HIV-1 treatment, however the virus will eventually escape the pressure by gaining mutations in the conserved regions of the viral genome without any severe fitness cost.
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36
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Gene transfer of two entry inhibitors protects CD4+ T cell from HIV-1 infection in humanized mice. Gene Ther 2015; 23:144-50. [DOI: 10.1038/gt.2015.101] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Revised: 09/14/2015] [Accepted: 10/09/2015] [Indexed: 02/07/2023]
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Méndez C, Ahlenstiel CL, Kelleher AD. Post-transcriptional gene silencing, transcriptional gene silencing and human immunodeficiency virus. World J Virol 2015; 4:219-244. [PMID: 26279984 PMCID: PMC4534814 DOI: 10.5501/wjv.v4.i3.219] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2014] [Revised: 01/24/2015] [Accepted: 04/29/2015] [Indexed: 02/05/2023] Open
Abstract
While human immunodeficiency virus 1 (HIV-1) infection is controlled through continuous, life-long use of a combination of drugs targeting different steps of the virus cycle, HIV-1 is never completely eradicated from the body. Despite decades of research there is still no effective vaccine to prevent HIV-1 infection. Therefore, the possibility of an RNA interference (RNAi)-based cure has become an increasingly explored approach. Endogenous gene expression is controlled at both, transcriptional and post-transcriptional levels by non-coding RNAs, which act through diverse molecular mechanisms including RNAi. RNAi has the potential to control the turning on/off of specific genes through transcriptional gene silencing (TGS), as well as fine-tuning their expression through post-transcriptional gene silencing (PTGS). In this review we will describe in detail the canonical RNAi pathways for PTGS and TGS, the relationship of TGS with other silencing mechanisms and will discuss a variety of approaches developed to suppress HIV-1 via manipulation of RNAi. We will briefly compare RNAi strategies against other approaches developed to target the virus, highlighting their potential to overcome the major obstacle to finding a cure, which is the specific targeting of the HIV-1 reservoir within latently infected cells.
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Herrera-Carrillo E, Berkhout B. Bone Marrow Gene Therapy for HIV/AIDS. Viruses 2015; 7:3910-36. [PMID: 26193303 PMCID: PMC4517133 DOI: 10.3390/v7072804] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 07/09/2015] [Accepted: 07/13/2015] [Indexed: 12/24/2022] Open
Abstract
Bone marrow gene therapy remains an attractive option for treating chronic immunological diseases, including acquired immunodeficiency syndrome (AIDS) caused by human immunodeficiency virus (HIV). This technology combines the differentiation and expansion capacity of hematopoietic stem cells (HSCs) with long-term expression of therapeutic transgenes using integrating vectors. In this review we summarize the potential of bone marrow gene therapy for the treatment of HIV/AIDS. A broad range of antiviral strategies are discussed, with a particular focus on RNA-based therapies. The idea is to develop a durable gene therapy that lasts the life span of the infected individual, thus contrasting with daily drug regimens to suppress the virus. Different approaches have been proposed to target either the virus or cellular genes encoding co-factors that support virus replication. Some of these therapies have been tested in clinical trials, providing proof of principle that gene therapy is a safe option for treating HIV/AIDS. In this review several topics are discussed, ranging from the selection of the antiviral molecule and the viral target to the optimal vector system for gene delivery and the setup of appropriate preclinical test systems. The molecular mechanisms used to formulate a cure for HIV infection are described, including the latest antiviral strategies and their therapeutic applications. Finally, a potent combination of anti-HIV genes based on our own research program is described.
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Affiliation(s)
- Elena Herrera-Carrillo
- Laboratory of Experimental Virology, Department of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, Amsterdam 1105 AZ, The Netherlands.
| | - Ben Berkhout
- Laboratory of Experimental Virology, Department of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, Amsterdam 1105 AZ, The Netherlands.
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Konadu KA, Anderson JS, Huang MB, Ali SA, Powell MD, Villinger F, Bond VC. Hallmarks of HIV-1 pathogenesis are modulated by Nef's Secretion Modification Region. ACTA ACUST UNITED AC 2015; 6. [PMID: 26523240 DOI: 10.4172/2155-6113.1000476] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
CD4+ T cell depletion and immune activation are hallmarks of HIV infection. Despite extensive studies, the mechanisms underlying immune modulation remain elusive. HIV-1 Nef protein is secreted in exosomes from infected cells and is abundant in the plasma of HIV+ individuals. Exosomal Nef (exNef) was also shown to induce apoptosis in bystander CD4+ T cells. We hypothesized that exNef contributes to HIV pathogenesis. A HIV-1 NL4-3 virus containing alanine substitutions in the secretion modification region (SMR; amino acids 66 to 70; HIVNefsmr5a) was developed. Nef protein containing this modified SMR was shown to be deficient in exNef secretion in nef-transfected cells. Using both HIV-1 NL4-3 wild type (HIVwt) and HIVNefsmr5a, correlates of pathogenesis were evaluated in cell-lines, human peripheral blood mononuclear cells, and humanized NOD-RAG1-/- IL2r-/- double mutant (NRG) mice. Disruption of the SMR did not affect viral replication or exNef secretion from infected cell cultures as compared with nef-transfected cells. However, T cell apoptosis was reduced in HIVNefsmr5a infected cell cultures and CD4+ T cell depletion was reduced in the spleen and peripheral blood of similarly infected NRG mice. Inflammatory cytokine release was also decreased in the sera of HIVNefsmr5a infected mice relative to HIVwt infected controls. These findings demonstrate the importance of Nef and the SMR motif in HIV pathogenesis and suggest a potential role for exNef in HIV-driven immune modulation.
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Affiliation(s)
- Kateena Addae Konadu
- Department of Microbiology, Biochemistry and Immunology, Morehouse School of Medicine, Atlanta, Georgia, USA
| | - Joseph S Anderson
- Department of Internal Medicine, University of California-Davis Medical Center, Sacramento, California, USA
| | - Ming-Bo Huang
- Department of Microbiology, Biochemistry and Immunology, Morehouse School of Medicine, Atlanta, Georgia, USA
| | - Syed A Ali
- Advanced Medical and Dental Institute, University Sain Malaysia, Pulau Pinang, Malaysia
| | - Michael D Powell
- Department of Microbiology, Biochemistry and Immunology, Morehouse School of Medicine, Atlanta, Georgia, USA
| | - Francois Villinger
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine and Division of Microbiology and Immunology, Yerkes National Primate Research Center, Atlanta, Georgia, USA
| | - Vincent C Bond
- Department of Microbiology, Biochemistry and Immunology, Morehouse School of Medicine, Atlanta, Georgia, USA
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40
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Karpel ME, Boutwell CL, Allen TM. BLT humanized mice as a small animal model of HIV infection. Curr Opin Virol 2015; 13:75-80. [PMID: 26083316 DOI: 10.1016/j.coviro.2015.05.002] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 05/05/2015] [Accepted: 05/06/2015] [Indexed: 11/25/2022]
Abstract
Humanized mice are valuable models for the research and development of vaccine strategies and therapeutic interventions to control or eradicate HIV. The BLT humanized mouse model is particularly promising because the combination of transplantation of human fetal pluripotent hematopoietic stem cells with surgical engraftment of human fetal thymic tissue results in improved T cell reconstitution, maturation, and selection. To date, the BLT humanized mouse model has been used to study many aspects of HIV infection including prevention, mucosal transmission, HIV-specific innate and adaptive immunity, viral latency, and novel antiretroviral and immune-based therapies for suppression and reservoir eradication. Here we describe recent advances and applications of the BLT humanized mouse model of HIV infection and discuss opportunities to further improve this valuable small animal model.
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Affiliation(s)
- Marshall E Karpel
- Ragon Institute of MGH, MIT and Harvard, Cambridge , MA, United States
| | | | - Todd M Allen
- Ragon Institute of MGH, MIT and Harvard, Cambridge , MA, United States.
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Liu Y, Zhou J, Pan JA, Mabiala P, Guo D. A novel approach to block HIV-1 coreceptor CXCR4 in non-toxic manner. Mol Biotechnol 2015; 56:890-902. [PMID: 24845753 DOI: 10.1007/s12033-014-9768-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The chemokine receptor CXCR4 is one of the major coreceptors for human immunodeficiency virus type 1 (HIV-1) and considered as an important therapeutic target. Knockdown of CXCR4 by RNA interference has emerged as a promising strategy for combating HIV-1 infection. However, there is a potential drawback to this strategy as undesired side effects may occur due to the loss of natural function of CXCR4. In this study, we developed a novel approach using a single lentiviral vector to express simultaneously CXCR4 dual-shRNAs and an shRNA-resistant CXCR4 mutant possessing the most possible natural functions of CXCR4 and reduced HIV-1 coreceptor activity. Via this approach we achieved the replacement of endogenous CXCR4 by CXCR4 mutant P191A that could compensate the functional loss of endogenous CXCR4 and significant reduction of HIV-1 replication by 59.2 %. Besides, we demonstrated that construction of recombinant lentiviral vector using 2A peptide-based strategy has significant advantages over using additional promoter-based strategy, including increase of lentivirus titer and avoidance of promoter competition. Therefore, the novel approach to block HIV-1 coreceptor CXCR4 without impairing its normal function provides a new strategy for CXCR4-targeted therapeutics for HIV-1 infection and potential universal applications to knock down a cellular protein in non-toxic manner.
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Affiliation(s)
- Ye Liu
- State Key Laboratory of Virology and Modern Virology Research Center, College of Life Sciences, Wuhan University, Wuhan, 430072, People's Republic of China
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42
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Lentivector Knockdown of CCR5 in Hematopoietic Stem and Progenitor Cells Confers Functional and Persistent HIV-1 Resistance in Humanized Mice. J Virol 2015; 89:6761-72. [PMID: 25903342 DOI: 10.1128/jvi.00277-15] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Accepted: 03/30/2015] [Indexed: 01/04/2023] Open
Abstract
UNLABELLED Gene-engineered CD34(+) hematopoietic stem and progenitor cells (HSPCs) can be used to generate an HIV-1-resistant immune system. However, a certain threshold of transduced HSPCs might be required for transplantation into mice for creating an HIV-resistant immune system. In this study, we combined CCR5 knockdown by a highly efficient microRNA (miRNA) lentivector with pretransplantation selection of transduced HSPCs to obtain a rather pure population of gene engineered CD34(+) cells. Low-level transduction of HSPCs and subsequent sorting by flow cytometry yielded >70% transduced cells. Mice transplanted with these cells showed functional and persistent resistance to a CCR5-tropic HIV strain: viral load was significantly decreased over months, and human CD4(+) T cells were preserved. In one mouse, viral mutations, resulting presumably in a CXCR4-tropic strain, overcame HIV resistance. Our results suggest that HSPC-based CCR5 knockdown may lead to efficient control of HIV in vivo. We overcame a major limitation of previous HIV gene therapy in humanized mice in which only a proportion of the cells in chimeric mice in vivo are anti-HIV engineered. Our strategy underlines the promising future of gene engineering HIV-resistant CD34(+) cells that produce a constant supply of HIV-resistant progeny. IMPORTANCE Major issues in experimental long-term in vivo HIV gene therapy have been (i) low efficacy of cell transduction at the time of transplantation and (ii) transduction resulting in multiple copies of heterologous DNA in target cells. In this study, we demonstrated the efficacy of a transplantation approach with a selection step for transduced cells that allows transplantation of an enriched population of HSPCs expressing a single (low) copy of a CCR5 miRNA. Efficient maintenance of CD4(+) T cells and a low viral titer resulted only when at least 70% of the HIV target cells were genetically modified. These findings imply that clinical protocols of HIV gene therapy require a selective enrichment of genetically targeted cells because positive selection of modified cells is likely to be insufficient below this threshold. This selection approach may be beneficial not only for HIV patients but also for other patients requiring transplantation of genetically modified cells.
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43
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Dispelling myths and focusing on notable concepts in HIV pathogenesis. Trends Mol Med 2015; 21:341-53. [PMID: 25883070 DOI: 10.1016/j.molmed.2015.03.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Revised: 03/05/2015] [Accepted: 03/13/2015] [Indexed: 01/01/2023]
Abstract
Since the discovery of HIV over three decades ago, major efforts have been made to control and perhaps eliminate HIV infection worldwide. During these studies, certain myths or misconceptions about this infectious disease have been emphasized and other potentially beneficial concepts have received less attention. A true long-term solution to HIV infection merits an appreciation of alternative ideas and findings that could be beneficial in the ultimate control of HIV/AIDS. Here, I discuss six issues and call for more attention to the science of HIV and well-designed clinical trials.
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44
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Focosi D, Maggi F, Ceccherini-Nelli L, Pistello M. Cell therapies for treatment of human immunodeficiency virus infection. Rev Med Virol 2015; 25:156-74. [PMID: 25727480 DOI: 10.1002/rmv.1831] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Revised: 01/30/2015] [Accepted: 02/05/2015] [Indexed: 12/15/2022]
Abstract
After the serendipitous discovery of HIV eradication in the "Berlin patient", interest has grown in curing HIV infection by replacing the patient's replication-competent blood cells with infection-resistant ones. At the same time, induced pluripotent stem cell technologies and genetic engineering have boosted cell therapy transfer into the clinic. Currently available cell therapy approaches to attempt to cure HIV infection include the following: (1) Transplantation of autologous or allogeneic cells spontaneously resistant or edited to resist HIV infection; (2) Transplantation of autologous T-lymphocytes spontaneously targeting or redirected against HIV; and (3) Transplantation of autologous cells engineered to work as anti-HIV antibody factories. We review here the preliminary results and potential for future applications of these approaches.
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Affiliation(s)
- Daniele Focosi
- Retrovirus Center and Virology Section, Department of Translational Research and of New Surgical and Medical Technologies, University of Pisa, Pisa, Italy
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45
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Shimizu S, Ringpis GE, Marsden MD, Cortado RV, Wilhalme HM, Elashoff D, Zack JA, Chen ISY, An DS. RNAi-Mediated CCR5 Knockdown Provides HIV-1 Resistance to Memory T Cells in Humanized BLT Mice. MOLECULAR THERAPY. NUCLEIC ACIDS 2015; 4:e227. [PMID: 25689223 PMCID: PMC4345313 DOI: 10.1038/mtna.2015.3] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Accepted: 01/06/2015] [Indexed: 11/20/2022]
Abstract
Transplantation of hematopoietic stem/progenitor cells (HSPC) modified with a lentiviral vector bearing a potent nontoxic short hairpin RNA (sh1005) directed to the HIV coreceptor CCR5 is capable of continuously producing CCR5 downregulated CD4+ T lymphocytes. Here, we characterized HIV-1 resistance of the sh1005-modified CD4+ T lymphocytes in vivo in humanized bone marrow/liver/thymus (hu BLT) mice. The sh1005-modified CD4+ T lymphocytes were positively selected in CCR5-tropic HIV-1-challenged mice. The sh1005-modified memory CD4+ T lymphocytes (the primary target of CCR5-tropic HIV-1) expressing sh1005 were maintained in lymphoid tissues in CCR5-tropic HIV-1-challenged mice. Frequencies of HIV-1 p24 expressing cells were significantly reduced in the sh1005-modified splenocytes by ex vivo cell stimulation confirming that CCR5 downregulated sh1005 modified cells are protected from viral infection. These results demonstrate that stable CCR5 downregulation through genetic modification of human HSPC by lentivirally delivered sh1005 is highly effective in providing HIV-1 resistance. Our results provide in vivo evidence in a relevant small animal model that sh1005 is a potent early-step anti-HIV reagent that has potential as a novel anti-HIV-1 HSPC gene therapeutic reagent for human applications.
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Affiliation(s)
- Saki Shimizu
- Hematology-Oncology, the Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
- School of Nursing, University of California, Los Angeles, California, USA
- UCLA AIDS Institute, Los Angeles, California, USA
| | - Gene-Errol Ringpis
- Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, California, USA
- UCLA AIDS Institute, Los Angeles, California, USA
| | - Matthew D Marsden
- Hematology-Oncology, the Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
- UCLA AIDS Institute, Los Angeles, California, USA
| | - Ruth V Cortado
- School of Nursing, University of California, Los Angeles, California, USA
- UCLA AIDS Institute, Los Angeles, California, USA
| | - Holly M Wilhalme
- Department of Medicine Statistics Core, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
| | - David Elashoff
- Department of Medicine Statistics Core, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
| | - Jerome A Zack
- Hematology-Oncology, the Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
- Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, California, USA
- UCLA AIDS Institute, Los Angeles, California, USA
| | - Irvin S Y Chen
- Hematology-Oncology, the Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
- Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, California, USA
- UCLA AIDS Institute, Los Angeles, California, USA
| | - Dong Sung An
- Hematology-Oncology, the Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
- School of Nursing, University of California, Los Angeles, California, USA
- UCLA AIDS Institute, Los Angeles, California, USA
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46
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De Ravin SS, Gray JT, Throm RE, Spindler J, Kearney M, Wu X, Coffin JM, Hughes SH, Malderelli F, Sorrentino BP, Malech HL. False-positive HIV PCR test following ex vivo lentiviral gene transfer treatment of X-linked severe combined immunodeficiency vector. Mol Ther 2014; 22:244-245. [PMID: 24487563 DOI: 10.1038/mt.2013.296] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Affiliation(s)
- Suk See De Ravin
- Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA.
| | - John T Gray
- St Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Robert E Throm
- St Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Jon Spindler
- HIV Drug Resistance Program, National Cancer Institute, National Institutes of Health, Frederick, Maryland, USA
| | - Mary Kearney
- HIV Drug Resistance Program, National Cancer Institute, National Institutes of Health, Frederick, Maryland, USA
| | - Xiaolin Wu
- Leidos Biomedical Research, Inc., Frederick National Laboratory for Cancer Research, Frederick, Maryland, USA
| | - John M Coffin
- HIV Drug Resistance Program, National Cancer Institute, National Institutes of Health, Frederick, Maryland, USA; Department of Molecular Biology and Microbiology, Tufts University, Boston, Massachusetts, USA
| | - Stephen H Hughes
- HIV Drug Resistance Program, National Cancer Institute, National Institutes of Health, Frederick, Maryland, USA
| | - Frank Malderelli
- HIV Drug Resistance Program, National Cancer Institute, National Institutes of Health, Frederick, Maryland, USA
| | | | - Harry L Malech
- Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
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47
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Abstract
Despite the success of antiretroviral therapy in suppressing HIV-1 replication and extending the life of HIV-1 infected individuals, this regimen is associated with risks for non-AIDS morbidity and mortality, requires life commitment, and has a high cost. In this context, gene therapy approaches that have the potential to cure HIV-1 infection present a clear option for eradication of the virus in the next decades. Gene therapy must overcome concerns related to its applicability to HIV-1 infection, the safety of cytotoxic conditioning required for cell-based approaches, clinical trial design, selection of gene-modified cells, and the restrictive cost of manufacturing and technology. These concerns are discussed herein in the context of the most relevant gene therapy studies conducted so far in HIV/AIDS.
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Affiliation(s)
- Rodica Stan
- Department of Virology, Beckman Research Institute of City of Hope, 1500 East Duarte Road, Duarte, CA, 91010, USA
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48
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Abou-El-Enein M, Bauer G, Reinke P, Renner M, Schneider CK. A roadmap toward clinical translation of genetically-modified stem cells for treatment of HIV. Trends Mol Med 2014; 20:632-42. [PMID: 25262540 DOI: 10.1016/j.molmed.2014.08.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Revised: 08/25/2014] [Accepted: 08/26/2014] [Indexed: 12/21/2022]
Abstract
During the past decade, successful gene therapies for immunodeficiencies were finally brought to the clinic. This was accomplished through new gene therapy vectors and improved procedures for genetic modification of autologous hematopoietic stem cells. For HIV, autologous hematopoietic stem cell (HSC) gene therapy with 'anti-HIV genes' promises a functional cure for the disease. However, to develop such a therapy and translate it into a clinical application is rather challenging. The risks and benefits of such a therapy have to be understood, and regulatory hurdles need to be overcome. In this joint paper by academic researchers and regulators, we are, therefore, outlining a high level roadmap for the early stage development of HSC gene therapy as a potential functional cure for HIV.
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Affiliation(s)
- Mohamed Abou-El-Enein
- Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Charité University Medicine Berlin, Campus Virchow, Berlin, Germany; Department of Nephrology and Internal Intensive Care, Charité University Medicine Berlin, Campus Virchow, Berlin, Germany.
| | - Gerhard Bauer
- University of California Davis, Institute For Regenerative Cures (IRC) Sacramento, CA, USA
| | - Petra Reinke
- Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Charité University Medicine Berlin, Campus Virchow, Berlin, Germany; Department of Nephrology and Internal Intensive Care, Charité University Medicine Berlin, Campus Virchow, Berlin, Germany
| | - Matthias Renner
- Paul-Ehrlich-Institut, Paul-Ehrlich-Str. 51-59, D-63225 Langen, Germany
| | - Christian K Schneider
- Formerly Committee for Advanced Therapies, European Medicines Agency, 7, Westferry Circus E14 4HB, London, UK; Danish Health and Medicines Authority, Axel Heides Gade 1, 2300 Copenhagen, Denmark; Twincore Centre for Experimental and Clinical Infection Research, Feodor-Lynen-Straße 730625 Hannover, Germany
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49
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Sebastian NT, Collins KL. Targeting HIV latency: resting memory T cells, hematopoietic progenitor cells and future directions. Expert Rev Anti Infect Ther 2014; 12:1187-201. [PMID: 25189526 DOI: 10.1586/14787210.2014.956094] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Current therapy for HIV effectively suppresses viral replication and prolongs life, but the infection persists due, at least in part, to latent infection of long-lived cells. One favored strategy toward a cure targets latent virus in resting memory CD4(+) T cells by stimulating viral production. However, the existence of an additional reservoir in bone marrow hematopoietic progenitor cells has been detected in some treated HIV-infected people. This review describes approaches investigators have used to reactivate latent proviral genomes in resting CD4(+) T cells and hematopoietic progenitor cells. In addition, the authors review approaches for clearance of these reservoirs along with other important topics related to HIV eradication.
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Affiliation(s)
- Nadia T Sebastian
- Program in Cellular and Molecular Biology, University of Michigan, Ann Arbor, MI 48109, USA
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50
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Petit N, Dorgham K, Levacher B, Burlion A, Gorochov G, Marodon G. Targeting Both Viral and Host Determinants of Human Immunodeficiency Virus Entry, Using a New Lentiviral Vector Coexpressing the T20 Fusion Inhibitor and a Selective CCL5 Intrakine. Hum Gene Ther Methods 2014; 25:232-40. [DOI: 10.1089/hgtb.2014.034] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Nicolas Petit
- Sorbonne Universités, UPMC Univ Paris 06, CR7, Centre d'Immunologie et des Maladies Infectieuses (CIMI), F-75013, Paris, France
- INSERM, U1135 (CIMI), Paris F-75013, France
- CNRS, ERL 8255 (CIMI), Paris F-75013, France
| | - Karim Dorgham
- Sorbonne Universités, UPMC Univ Paris 06, CR7, Centre d'Immunologie et des Maladies Infectieuses (CIMI), F-75013, Paris, France
- INSERM, U1135 (CIMI), Paris F-75013, France
- CNRS, ERL 8255 (CIMI), Paris F-75013, France
| | | | - Aude Burlion
- Sorbonne Universités, UPMC Univ Paris 06, CR7, Centre d'Immunologie et des Maladies Infectieuses (CIMI), F-75013, Paris, France
- INSERM, U1135 (CIMI), Paris F-75013, France
- CNRS, ERL 8255 (CIMI), Paris F-75013, France
| | - Guy Gorochov
- Sorbonne Universités, UPMC Univ Paris 06, CR7, Centre d'Immunologie et des Maladies Infectieuses (CIMI), F-75013, Paris, France
- INSERM, U1135 (CIMI), Paris F-75013, France
- Service Immunologie, Hôpital Pitié-Salpétrière, AP-HP, Paris F-75013, France
| | - Gilles Marodon
- Sorbonne Universités, UPMC Univ Paris 06, CR7, Centre d'Immunologie et des Maladies Infectieuses (CIMI), F-75013, Paris, France
- INSERM, U1135 (CIMI), Paris F-75013, France
- CNRS, ERL 8255 (CIMI), Paris F-75013, France
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