1
|
Twentyman J, Emerman M, Ohainle M. Capsid-dependent lentiviral restrictions. J Virol 2024; 98:e0030824. [PMID: 38497663 PMCID: PMC11019884 DOI: 10.1128/jvi.00308-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2024] Open
Abstract
Host antiviral proteins inhibit primate lentiviruses and other retroviruses by targeting many features of the viral life cycle. The lentiviral capsid protein and the assembled viral core are known to be inhibited through multiple, directly acting antiviral proteins. Several phenotypes, including those known as Lv1 through Lv5, have been described as cell type-specific blocks to infection against some but not all primate lentiviruses. Here we review important features of known capsid-targeting blocks to infection together with several blocks to infection for which the genes responsible for the inhibition still remain to be identified. We outline the features of these blocks as well as how current methodologies are now well suited to find these antiviral genes and solve these long-standing mysteries in the HIV and retrovirology fields.
Collapse
Affiliation(s)
- Joy Twentyman
- Division of Human Biology, Fred Hutchinson Cancer Center, Seattle, Washington, USA
| | - Michael Emerman
- Division of Human Biology, Fred Hutchinson Cancer Center, Seattle, Washington, USA
| | - Molly Ohainle
- Department of Molecular and Cell Biology, Division of Immunology and Molecular Medicine, University of California Berkeley, Berkeley, California, USA
| |
Collapse
|
2
|
Elsner C, Ponnurangam A, Kazmierski J, Zillinger T, Jansen J, Todt D, Döhner K, Xu S, Ducroux A, Kriedemann N, Malassa A, Larsen PK, Hartmann G, Barchet W, Steinmann E, Kalinke U, Sodeik B, Goffinet C. Absence of cGAS-mediated type I IFN responses in HIV-1-infected T cells. Proc Natl Acad Sci U S A 2020; 117:19475-19486. [PMID: 32709741 PMCID: PMC7431009 DOI: 10.1073/pnas.2002481117] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The DNA sensor cGAS catalyzes the production of the cyclic dinucleotide cGAMP, resulting in type I interferon responses. We addressed the functionality of cGAS-mediated DNA sensing in human and murine T cells. Activated primary CD4+ T cells expressed cGAS and responded to plasmid DNA by upregulation of ISGs and release of bioactive interferon. In mouse T cells, cGAS KO ablated sensing of plasmid DNA, and TREX1 KO enabled cells to sense short immunostimulatory DNA. Expression of IFIT1 and MX2 was downregulated and upregulated in cGAS KO and TREX1 KO T cell lines, respectively, compared to parental cells. Despite their intact cGAS sensing pathway, human CD4+ T cells failed to mount a reverse transcriptase (RT) inhibitor-sensitive immune response following HIV-1 infection. In contrast, infection of human T cells with HSV-1 that is functionally deficient for the cGAS antagonist pUL41 (HSV-1ΔUL41N) resulted in a cGAS-dependent type I interferon response. In accordance with our results in primary CD4+ T cells, plasmid challenge or HSV-1ΔUL41N inoculation of T cell lines provoked an entirely cGAS-dependent type I interferon response, including IRF3 phosphorylation and expression of ISGs. In contrast, no RT-dependent interferon response was detected following transduction of T cell lines with VSV-G-pseudotyped lentiviral or gammaretroviral particles. Together, T cells are capable to raise a cGAS-dependent cell-intrinsic response to both plasmid DNA challenge or inoculation with HSV-1ΔUL41N. However, HIV-1 infection does not appear to trigger cGAS-mediated sensing of viral DNA in T cells, possibly by revealing viral DNA of insufficient quantity, length, and/or accessibility to cGAS.
Collapse
Affiliation(s)
- Carina Elsner
- Institute for Experimental Virology, TWINCORE, Centre for Experimental and Clinical Infection Research, 30625 Hanover, Germany
- Institute for Virology, University of Duisburg-Essen, University Hospital Essen, 45147 Essen, Germany
| | - Aparna Ponnurangam
- Institute for Experimental Virology, TWINCORE, Centre for Experimental and Clinical Infection Research, 30625 Hanover, Germany
| | - Julia Kazmierski
- Institute for Experimental Virology, TWINCORE, Centre for Experimental and Clinical Infection Research, 30625 Hanover, Germany
- Institute of Virology, Charité-Universitätsmedizin Berlin, 10117 Berlin, Germany
- Berlin Institute of Health, 10178 Berlin, Germany
| | - Thomas Zillinger
- Institute of Clinical Chemistry and Clinical Pharmacology, University Hospital, University of Bonn, 53127 Bonn, Germany
| | - Jenny Jansen
- Institute of Virology, Charité-Universitätsmedizin Berlin, 10117 Berlin, Germany
- Berlin Institute of Health, 10178 Berlin, Germany
| | - Daniel Todt
- Department of Molecular and Medical Virology, Ruhr University Bochum, 44801 Bochum, Germany
- European Virus Bioinformatics Center, 07743 Jena, Germany
| | - Katinka Döhner
- Institute of Virology, Hanover Medical School, 30625 Hanover, Germany
| | - Shuting Xu
- Institute for Experimental Virology, TWINCORE, Centre for Experimental and Clinical Infection Research, 30625 Hanover, Germany
| | - Aurélie Ducroux
- Institute for Experimental Virology, TWINCORE, Centre for Experimental and Clinical Infection Research, 30625 Hanover, Germany
| | - Nils Kriedemann
- Institute for Experimental Virology, TWINCORE, Centre for Experimental and Clinical Infection Research, 30625 Hanover, Germany
| | - Angelina Malassa
- Institute for Experimental Virology, TWINCORE, Centre for Experimental and Clinical Infection Research, 30625 Hanover, Germany
| | - Pia-Katharina Larsen
- Institute for Experimental Infection Research, TWINCORE, Centre for Experimental and Clinical Infection Research, 30625 Hanover, Germany
| | - Gunther Hartmann
- Institute of Clinical Chemistry and Clinical Pharmacology, University Hospital, University of Bonn, 53127 Bonn, Germany
| | - Winfried Barchet
- Institute of Clinical Chemistry and Clinical Pharmacology, University Hospital, University of Bonn, 53127 Bonn, Germany
- German Center for Infection Research, 50935 Cologne-Bonn, Germany
| | - Eike Steinmann
- Department of Molecular and Medical Virology, Ruhr University Bochum, 44801 Bochum, Germany
| | - Ulrich Kalinke
- Institute for Experimental Infection Research, TWINCORE, Centre for Experimental and Clinical Infection Research, 30625 Hanover, Germany
| | - Beate Sodeik
- Institute of Virology, Hanover Medical School, 30625 Hanover, Germany
- Cluster of Excellence Resolving Infection Susceptibility (Excellence Cluster 2155), Hanover Medical School, 30625 Hanover, Germany
| | - Christine Goffinet
- Institute for Experimental Virology, TWINCORE, Centre for Experimental and Clinical Infection Research, 30625 Hanover, Germany;
- Institute of Virology, Charité-Universitätsmedizin Berlin, 10117 Berlin, Germany
- Berlin Institute of Health, 10178 Berlin, Germany
| |
Collapse
|
3
|
Efficient inactivation of pseudotyped HIV-based lentiviral vectors and infectious HIV. J Virol Methods 2019; 276:113768. [PMID: 31704112 DOI: 10.1016/j.jviromet.2019.113768] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 11/01/2019] [Accepted: 11/01/2019] [Indexed: 11/24/2022]
Abstract
Lentiviral vectors and lentiviruses are important tools for basic and applied biomedical research. Yet, biosafety regulations from legal authorities have to be fulfilled when transferring BSL-2 to -3 vectors/viruses to facilities with lower biosafety level. Here, we (re-)evaluated different chemical and thermal approaches to inactivate vesicular stomatitis virus G-protein (VSV-G) pseudotyped lentiviral vectors and either wildtype or VSV-G pseudotyped human immunodeficiency viruses (HIV). Aldehydes, detergents and alcohols were as effective as thermal inactivation procedures to efficiently inactivate purified lentiviral vectors and replication-competent HIV. In addition, no residual infectivity was detected when inactivating HIV-infected TZM-bl reporter cells with selected detergents and aldehydes. Thus, our established inactivation protocols can be used by other laboratories working with lentiviral vectors or infectious lentiviruses and provide a template for viruses with similar physicochemical properties.
Collapse
|
4
|
Delville M, Soheili T, Bellier F, Durand A, Denis A, Lagresle-Peyrou C, Cavazzana M, Andre-Schmutz I, Six E. A Nontoxic Transduction Enhancer Enables Highly Efficient Lentiviral Transduction of Primary Murine T Cells and Hematopoietic Stem Cells. MOLECULAR THERAPY-METHODS & CLINICAL DEVELOPMENT 2018; 10:341-347. [PMID: 30191160 PMCID: PMC6125771 DOI: 10.1016/j.omtm.2018.08.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 08/01/2018] [Indexed: 12/16/2022]
Abstract
Lentiviral vectors have emerged as an efficient, safe therapeutic tool for gene therapy based on hematopoietic stem cells (HSCs) or T cells. However, the monitoring of transduced cells in preclinical models remains challenging because of the inefficient transduction of murine primary T cells with lentiviral vectors, in contrast to gammaretroviral vectors. The use of this later in preclinical proof of concept is not considered as relevant when a lentiviral vector will be used in a clinical trial. Hence, there is an urgent need to develop an efficient transduction protocol for murine cells with lentiviral vectors. Here, we describe an optimized protocol in which a nontoxic transduction enhancer (Lentiboost) enables the efficient transduction of primary murine T cells with lentiviral vectors. The optimized protocol combines low toxicity and high transduction efficiency. We achieved a high-level transduction of murine CD4+ and CD8+ T cells with a VSV-G-pseudotyped lentiviral vector with no changes in the phenotypes of transduced T cells, which were stable and long-lived in culture. This enhancer also increased the transduction of murine HSCs. Hence, use of this new transduction enhancer overcomes the limitations of lentiviral vectors in preclinical experiments and should facilitate the translation of strategies based on lentiviral vectors from the bench to the clinic.
Collapse
Affiliation(s)
- Marianne Delville
- Laboratory of Human Lymphohematopoiesis, INSERM UMR 1163, Imagine Institute, Paris, France.,Apheresis and Biotherapy Department, Necker Hospital, APHP, Paris, France.,University of Paris Descartes-Sorbonne Paris Cité, Paris, France.,Biotherapy Clinical Investigation Center, Groupe Hospitalier Universitaire Ouest, Assistance Publique-Hôpitaux de Paris, INSERM CIC 1416, Paris, France
| | - Tayebeh Soheili
- Laboratory of Human Lymphohematopoiesis, INSERM UMR 1163, Imagine Institute, Paris, France.,Apheresis and Biotherapy Department, Necker Hospital, APHP, Paris, France.,University of Paris Descartes-Sorbonne Paris Cité, Paris, France.,Biotherapy Clinical Investigation Center, Groupe Hospitalier Universitaire Ouest, Assistance Publique-Hôpitaux de Paris, INSERM CIC 1416, Paris, France
| | - Florence Bellier
- Laboratory of Human Lymphohematopoiesis, INSERM UMR 1163, Imagine Institute, Paris, France.,University of Paris Descartes-Sorbonne Paris Cité, Paris, France.,Biotherapy Clinical Investigation Center, Groupe Hospitalier Universitaire Ouest, Assistance Publique-Hôpitaux de Paris, INSERM CIC 1416, Paris, France
| | - Amandine Durand
- Laboratory of Human Lymphohematopoiesis, INSERM UMR 1163, Imagine Institute, Paris, France.,University of Paris Descartes-Sorbonne Paris Cité, Paris, France.,Biotherapy Clinical Investigation Center, Groupe Hospitalier Universitaire Ouest, Assistance Publique-Hôpitaux de Paris, INSERM CIC 1416, Paris, France
| | - Adeline Denis
- Laboratory of Human Lymphohematopoiesis, INSERM UMR 1163, Imagine Institute, Paris, France.,University of Paris Descartes-Sorbonne Paris Cité, Paris, France.,Biotherapy Clinical Investigation Center, Groupe Hospitalier Universitaire Ouest, Assistance Publique-Hôpitaux de Paris, INSERM CIC 1416, Paris, France
| | - Chantal Lagresle-Peyrou
- Laboratory of Human Lymphohematopoiesis, INSERM UMR 1163, Imagine Institute, Paris, France.,University of Paris Descartes-Sorbonne Paris Cité, Paris, France.,Biotherapy Clinical Investigation Center, Groupe Hospitalier Universitaire Ouest, Assistance Publique-Hôpitaux de Paris, INSERM CIC 1416, Paris, France
| | - Marina Cavazzana
- Laboratory of Human Lymphohematopoiesis, INSERM UMR 1163, Imagine Institute, Paris, France.,Apheresis and Biotherapy Department, Necker Hospital, APHP, Paris, France.,University of Paris Descartes-Sorbonne Paris Cité, Paris, France.,Biotherapy Clinical Investigation Center, Groupe Hospitalier Universitaire Ouest, Assistance Publique-Hôpitaux de Paris, INSERM CIC 1416, Paris, France
| | - Isabelle Andre-Schmutz
- Laboratory of Human Lymphohematopoiesis, INSERM UMR 1163, Imagine Institute, Paris, France.,University of Paris Descartes-Sorbonne Paris Cité, Paris, France.,Biotherapy Clinical Investigation Center, Groupe Hospitalier Universitaire Ouest, Assistance Publique-Hôpitaux de Paris, INSERM CIC 1416, Paris, France
| | - Emmanuelle Six
- Laboratory of Human Lymphohematopoiesis, INSERM UMR 1163, Imagine Institute, Paris, France.,University of Paris Descartes-Sorbonne Paris Cité, Paris, France.,Biotherapy Clinical Investigation Center, Groupe Hospitalier Universitaire Ouest, Assistance Publique-Hôpitaux de Paris, INSERM CIC 1416, Paris, France
| |
Collapse
|
5
|
Gu CJ, Borjabad A, Hadas E, Kelschenbach J, Kim BH, Chao W, Arancio O, Suh J, Polsky B, McMillan J, Edagwa B, Gendelman HE, Potash MJ, Volsky DJ. EcoHIV infection of mice establishes latent viral reservoirs in T cells and active viral reservoirs in macrophages that are sufficient for induction of neurocognitive impairment. PLoS Pathog 2018; 14:e1007061. [PMID: 29879225 PMCID: PMC5991655 DOI: 10.1371/journal.ppat.1007061] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 04/29/2018] [Indexed: 02/06/2023] Open
Abstract
Suppression of HIV replication by antiretroviral therapy (ART) or host immunity can prevent AIDS but not other HIV-associated conditions including neurocognitive impairment (HIV-NCI). Pathogenesis in HIV-suppressed individuals has been attributed to reservoirs of latent-inducible virus in resting CD4+ T cells. Macrophages are persistently infected with HIV but their role as HIV reservoirs in vivo has not been fully explored. Here we show that infection of conventional mice with chimeric HIV, EcoHIV, reproduces physiological conditions for development of disease in people on ART including immunocompetence, stable suppression of HIV replication, persistence of integrated, replication-competent HIV in T cells and macrophages, and manifestation of learning and memory deficits in behavioral tests, termed here murine HIV-NCI. EcoHIV established latent reservoirs in CD4+ T lymphocytes in chronically-infected mice but could be induced by epigenetic modulators ex vivo and in mice. In contrast, macrophages expressed EcoHIV constitutively in mice for up to 16 months; murine leukemia virus (MLV), the donor of gp80 envelope in EcoHIV, did not infect macrophages. Both EcoHIV and MLV were found in brain tissue of infected mice but only EcoHIV induced NCI. Murine HIV-NCI was prevented by antiretroviral prophylaxis but once established neither persistent EcoHIV infection in mice nor NCI could be reversed by long-acting antiretroviral therapy. EcoHIV-infected, athymic mice were more permissive to virus replication in macrophages than were wild-type mice, suffered cognitive dysfunction, as well as increased numbers of monocytes and macrophages infiltrating the brain. Our results suggest an important role of HIV expressing macrophages in HIV neuropathogenesis in hosts with suppressed HIV replication.
Collapse
Affiliation(s)
- Chao-Jiang Gu
- Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
| | - Alejandra Borjabad
- Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
| | - Eran Hadas
- Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
| | - Jennifer Kelschenbach
- Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
| | - Boe-Hyun Kim
- Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
| | - Wei Chao
- Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
| | - Ottavio Arancio
- Department of Pathology and Cell Biology, Columbia University Medical Center, New York, New York, United States of America
| | - Jin Suh
- Department of Medicine, St. Joseph’s Regional Medical Center, Paterson, New Jersey, United States of America
| | - Bruce Polsky
- Department of Medicine, NYU Winthrop Hospital, Mineola, New York, United States of America
| | - JoEllyn McMillan
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Benson Edagwa
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Howard E. Gendelman
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Mary Jane Potash
- Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
| | - David J. Volsky
- Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
| |
Collapse
|
6
|
Abstract
Human immunodeficiency virus (HIV) infection induces neuronal injuries, with almost 50% of infected individuals developing HIV-associated neurocognitive disorders (HAND). Although highly activate antiretroviral therapy (HAART) has significantly reduced the incidence of severe dementia, the overall prevalence of HAND remains high. Synaptic degeneration is emerging as one of the most relevant neuropathologies associate with HAND. Previous studies have reported critical roles of viral proteins and inflammatory responses in this pathogenesis. Infected cells, including macrophages, microglia and astrocytes, may release viral proteins and other neurotoxins to stimulate neurons and cause excessive calcium influx, overproduction of free radicals and disruption of neurotransmitter hemostasis. The dysregulation of neural circuits likely leads to synaptic damage and loss. Identification of the specific mechanism of the synaptic degeneration may facilitate the development of effective therapeutic approaches to treat HAND.
Collapse
Affiliation(s)
- Wenjuan Ru
- Department of Neuroscience and Cell Biology, University of Texas Medical Branch, Galveston, TX, 77555, USA
| | - Shao-Jun Tang
- Department of Neuroscience and Cell Biology, University of Texas Medical Branch, Galveston, TX, 77555, USA.
| |
Collapse
|
7
|
Geis FK, Galla M, Hoffmann D, Kuehle J, Zychlinski D, Maetzig T, Schott JW, Schwarzer A, Goffinet C, Goff SP, Schambach A. Potent and reversible lentiviral vector restriction in murine induced pluripotent stem cells. Retrovirology 2017; 14:34. [PMID: 28569216 PMCID: PMC5452410 DOI: 10.1186/s12977-017-0358-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Accepted: 05/23/2017] [Indexed: 12/12/2022] Open
Abstract
Background Retroviral vectors are derived from wild-type retroviruses, can be used to study retrovirus-host interactions and are effective tools in gene and cell therapy. However, numerous cell types are resistant or less permissive to retrovirus infection due to the presence of active defense mechanisms, or the absence of important cellular host co-factors. In contrast to multipotent stem cells, pluripotent stem cells (PSC) have potential to differentiate into all three germ layers. Much remains to be elucidated in the field of anti-viral immunity in stem cells, especially in PSC. Results In this study, we report that transduction with HIV-1-based, lentiviral vectors (LV) is impaired in murine PSC. Analyses of early retroviral events in induced pluripotent stem cells (iPSC) revealed that the restriction is independent of envelope choice and does not affect reverse transcription, but perturbs nuclear entry and proviral integration. Proteasomal inhibition by MG132 could not circumvent the restriction. However, prevention of cyclophilin A (CypA) binding to the HIV-1 capsid via use of either a CypA inhibitor (cyclosporine A) or CypA-independent capsid mutants improved transduction. In addition, application of higher vector doses also increased transduction. Our data revealed a CypA mediated restriction in iPSC, which was acquired during reprogramming, associated with pluripotency and relieved upon subsequent differentiation. Conclusions We showed that murine PSC and iPSC are less susceptible to LV. The block observed in iPSC was CypA-dependent and resulted in reduced nuclear entry of viral DNA and proviral integration. Our study helps to improve transduction of murine pluripotent cells with HIV-1-based vectors and contributes to our understanding of retrovirus-host interactions in PSC. Electronic supplementary material The online version of this article (doi:10.1186/s12977-017-0358-1) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Franziska K Geis
- Institute of Experimental Hematology, Hannover Medical School, Carl-Neuberg-Str. 1, Hannover, Germany.,REBIRTH Cluster of Excellence, Hannover Medical School, Hannover, Germany
| | - Melanie Galla
- Institute of Experimental Hematology, Hannover Medical School, Carl-Neuberg-Str. 1, Hannover, Germany.,REBIRTH Cluster of Excellence, Hannover Medical School, Hannover, Germany
| | - Dirk Hoffmann
- Institute of Experimental Hematology, Hannover Medical School, Carl-Neuberg-Str. 1, Hannover, Germany.,REBIRTH Cluster of Excellence, Hannover Medical School, Hannover, Germany
| | - Johannes Kuehle
- Institute of Experimental Hematology, Hannover Medical School, Carl-Neuberg-Str. 1, Hannover, Germany.,REBIRTH Cluster of Excellence, Hannover Medical School, Hannover, Germany
| | - Daniela Zychlinski
- Institute of Experimental Hematology, Hannover Medical School, Carl-Neuberg-Str. 1, Hannover, Germany.,REBIRTH Cluster of Excellence, Hannover Medical School, Hannover, Germany
| | - Tobias Maetzig
- Institute of Experimental Hematology, Hannover Medical School, Carl-Neuberg-Str. 1, Hannover, Germany.,REBIRTH Cluster of Excellence, Hannover Medical School, Hannover, Germany
| | - Juliane W Schott
- Institute of Experimental Hematology, Hannover Medical School, Carl-Neuberg-Str. 1, Hannover, Germany.,REBIRTH Cluster of Excellence, Hannover Medical School, Hannover, Germany
| | - Adrian Schwarzer
- Institute of Experimental Hematology, Hannover Medical School, Carl-Neuberg-Str. 1, Hannover, Germany.,REBIRTH Cluster of Excellence, Hannover Medical School, Hannover, Germany
| | - Christine Goffinet
- Institute of Experimental Virology, TWINCORE, Centre for Experimental and Clinical Infections Research, Hannover, Germany
| | - Stephen P Goff
- Department of Biochemistry and Molecular Biophysics, Columbia University Medical Center, New York, NY, USA.,Department of Microbiology and Immunology, Columbia University Medical Center, New York, NY, USA.,Howard Hughes Medical Institute, Columbia University Medical Center, New York, NY, USA
| | - Axel Schambach
- Institute of Experimental Hematology, Hannover Medical School, Carl-Neuberg-Str. 1, Hannover, Germany. .,REBIRTH Cluster of Excellence, Hannover Medical School, Hannover, Germany. .,Division of Hematology/Oncology, Children's Hospital Boston, Harvard Medical School, Boston, MA, USA.
| |
Collapse
|
8
|
Shida H, Okada H, Suzuki H, Zhang X, Chen J, Tsunetsugu-Yokota Y, Tanaka Y, Yakushiji F, Hayashi Y. HIV-1 susceptibility of transgenic rat-derived primary macrophage/T cells and a T cell line that express human receptors, CyclinT1 and CRM1 genes. Genes Cells 2017; 22:424-435. [PMID: 28326644 DOI: 10.1111/gtc.12486] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 02/19/2017] [Indexed: 12/27/2022]
Abstract
We developed transgenic (Tg) rats that express human CD4, CCR5, CXCR4, CyclinT1, and CRM1 genes. Tg rat macrophages were efficiently infected with HIV-1 and supported production of infectious progeny virus. By contrast, both rat primary CD4+ T cells and established T cell lines expressing human CD4, CCR5, CyclinT1, and CRM1 genes were infected inefficiently, but this was ameliorated by inhibition of cyclophilin A. The infectivity of rat T cell-derived virus was lower than that of human T cell-derived virus.
Collapse
Affiliation(s)
- Hisatoshi Shida
- Institute for Genetic Medicine, Hokkaido University, Kita-ku, Sapporo, 060-0815, Japan
| | - Hiroyuki Okada
- Institute for Genetic Medicine, Hokkaido University, Kita-ku, Sapporo, 060-0815, Japan
| | - Hajime Suzuki
- Institute for Genetic Medicine, Hokkaido University, Kita-ku, Sapporo, 060-0815, Japan
| | - Xianfeng Zhang
- Institute for Genetic Medicine, Hokkaido University, Kita-ku, Sapporo, 060-0815, Japan
| | - Jing Chen
- Institute for Genetic Medicine, Hokkaido University, Kita-ku, Sapporo, 060-0815, Japan
| | - Yasuko Tsunetsugu-Yokota
- Department of Medical Technology, Tokyo University of Technology, 5-23-22 Nishikamata, Ohta-ku, Tokyo, 144-8535, Japan
| | - Yuetsu Tanaka
- Department of Immunology, Graduate School of Medicine, University of the Ryukyus, Uehara 207, Nishihara-cho, Okinawa, 903-0125, Japan
| | - Fumika Yakushiji
- Department of Medicinal Chemistry, Tokyo University of Pharmacy and Life Science, 1432-1, Horinouchi, Hachioji, Tokyo, 192-0392, Japan
| | - Yoshio Hayashi
- Department of Medicinal Chemistry, Tokyo University of Pharmacy and Life Science, 1432-1, Horinouchi, Hachioji, Tokyo, 192-0392, Japan
| |
Collapse
|
9
|
Behrendt R, Schumann T, Gerbaulet A, Nguyen LA, Schubert N, Alexopoulou D, Berka U, Lienenklaus S, Peschke K, Gibbert K, Wittmann S, Lindemann D, Weiss S, Dahl A, Naumann R, Dittmer U, Kim B, Mueller W, Gramberg T, Roers A. Mouse SAMHD1 has antiretroviral activity and suppresses a spontaneous cell-intrinsic antiviral response. Cell Rep 2013; 4:689-96. [PMID: 23972988 PMCID: PMC4807655 DOI: 10.1016/j.celrep.2013.07.037] [Citation(s) in RCA: 123] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Revised: 06/27/2013] [Accepted: 07/25/2013] [Indexed: 12/01/2022] Open
Abstract
Aicardi-Goutières syndrome (AGS), a hereditary autoimmune disease, clinically and biochemically overlaps with systemic lupus erythematosus (SLE) and, like SLE, is characterized by spontaneous type I interferon (IFN) production. The finding that defects of intracellular nucleases cause AGS led to the concept that intracellular accumulation of nucleic acids triggers inappropriate production of type I IFN and autoimmunity. AGS can also be caused by defects of SAMHD1, a 3' exonuclease and deoxynucleotide (dNTP) triphosphohydrolase. Human SAMHD1 is an HIV-1 restriction factor that hydrolyzes dNTPs and decreases their concentration below the levels required for retroviral reverse transcription. We show in gene-targeted mice that also mouse SAMHD1 reduces cellular dNTP concentrations and restricts retroviral replication in lymphocytes, macrophages, and dendritic cells. Importantly, the absence of SAMHD1 triggered IFN-β-dependent transcriptional upregulation of type I IFN-inducible genes in various cell types indicative of spontaneous IFN production. SAMHD1-deficient mice may be instrumental for elucidating the mechanisms that trigger pathogenic type I IFN responses in AGS and SLE.
Collapse
|
10
|
Suwanmanee T, Hu G, Gui T, Bartholomae CC, Kutschera I, von Kalle C, Schmidt M, Monahan PE, Kafri T. Integration-deficient lentiviral vectors expressing codon-optimized R338L human FIX restore normal hemostasis in Hemophilia B mice. Mol Ther 2013; 22:567-574. [PMID: 23941813 DOI: 10.1038/mt.2013.188] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2013] [Accepted: 07/31/2013] [Indexed: 12/31/2022] Open
Abstract
Integration-deficient lentiviral vectors (IDLVs) have been shown to transduce a wide spectrum of target cells and organs in vitro and in vivo and to maintain long-term transgene expression in nondividing cells. However, epigenetic silencing of episomal vector genomes reduces IDLV transgene expression levels and renders these safe vectors less efficient. In this article, we describe for the first time a complete correction of factor IX (FIX) deficiency in hemophilia B mice by IDLVs carrying a novel, highly potent human FIX cDNA. A 50-fold increase in human FIX cDNA potency was achieved by combining two mechanistically independent yet synergistic strategies: (i) optimization of the human FIX cDNA codon usage to increase human FIX protein production per vector genome and (ii) generation of a highly catalytic mutant human FIX protein in which the arginine residue at position 338 was substituted with leucine. The enhanced human FIX activity was not associated with liver damage or with the formation of human FIX-directed inhibitory antibodies and rendered IDLV-treated FIX-knockout mice resistant to a challenging tail-clipping assay. A novel S1 nuclease-based B1-quantitative polymerase chain reaction assay showed low levels of IDLV integration in mouse liver. Overall, this study demonstrates that IDLVs carrying an improved human FIX cDNA safely and efficiently cure hemophilia B in a mouse model.
Collapse
Affiliation(s)
- Thipparat Suwanmanee
- Gene Therapy Center, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Genlin Hu
- Gene Therapy Center, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Tong Gui
- Gene Therapy Center, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Cynthia C Bartholomae
- Department of Translational Oncology, National Center for Tumor Diseases (NCT) and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Ina Kutschera
- Department of Translational Oncology, National Center for Tumor Diseases (NCT) and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Christof von Kalle
- Department of Translational Oncology, National Center for Tumor Diseases (NCT) and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Manfred Schmidt
- Department of Translational Oncology, National Center for Tumor Diseases (NCT) and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Paul E Monahan
- Gene Therapy Center, University of North Carolina, Chapel Hill, North Carolina, USA; Department of Pediatrics, Division of Hematology/Oncology, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
| | - Tal Kafri
- Gene Therapy Center, University of North Carolina, Chapel Hill, North Carolina, USA; Department of Microbiology and Immunology, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA.
| |
Collapse
|
11
|
Baldauf HM, Pan X, Erikson E, Schmidt S, Daddacha W, Burggraf M, Schenkova K, Ambiel I, Wabnitz G, Gramberg T, Panitz S, Flory E, Landau NR, Sertel S, Rutsch F, Lasitschka F, Kim B, König R, Fackler OT, Keppler OT. SAMHD1 restricts HIV-1 infection in resting CD4(+) T cells. Nat Med 2013; 18:1682-7. [PMID: 22972397 DOI: 10.1038/nm.2964] [Citation(s) in RCA: 473] [Impact Index Per Article: 43.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2012] [Accepted: 09/04/2012] [Indexed: 12/20/2022]
Abstract
Unlike activated CD4(+) T cells, resting CD4(+) T cells are highly resistant to productive HIV-1 infection. Early after HIV-1 entry, a major block limits reverse transcription of incoming viral genomes. Here we show that the deoxynucleoside triphosphate triphosphohydrolase SAMHD1 prevents reverse transcription of HIV-1 RNA in resting CD4(+) T cells. SAMHD1 is abundantly expressed in resting CD4(+) T cells circulating in peripheral blood and residing in lymphoid organs. The early restriction to infection in unstimulated CD4(+) T cells is overcome by HIV-1 or HIV-2 virions into which viral Vpx is artificially or naturally packaged, respectively, or by addition of exogenous deoxynucleosides. Vpx-mediated proteasomal degradation of SAMHD1 and elevation of intracellular deoxynucleotide pools precede successful infection by Vpx-carrying HIV. Resting CD4(+) T cells from healthy donors following SAMHD1 silencing or from a patient with Aicardi-Goutières syndrome homozygous for a nonsense mutation in SAMHD1 were permissive for HIV-1 infection. Thus, SAMHD1 imposes an effective restriction to HIV-1 infection in the large pool of noncycling CD4(+) T cells in vivo. Bypassing SAMHD1 was insufficient for the release of viral progeny, implicating other barriers at later stages of HIV replication. Together, these findings may unveil new ways to interfere with the immune evasion and T cell immunopathology of pandemic HIV-1.
Collapse
Affiliation(s)
- Hanna-Mari Baldauf
- Department of Infectious Diseases, Virology, University of Heidelberg, Heidelberg, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Cornils K, Bartholomae CC, Thielecke L, Lange C, Arens A, Glauche I, Mock U, Riecken K, Gerdes S, von Kalle C, Schmidt M, Roeder I, Fehse B. Comparative clonal analysis of reconstitution kinetics after transplantation of hematopoietic stem cells gene marked with a lentiviral SIN or a γ-retroviral LTR vector. Exp Hematol 2013; 41:28-38.e3. [DOI: 10.1016/j.exphem.2012.09.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Revised: 08/28/2012] [Accepted: 09/10/2012] [Indexed: 12/13/2022]
|
13
|
Coutant F, Sanchez David RY, Félix T, Boulay A, Caleechurn L, Souque P, Thouvenot C, Bourgouin C, Beignon AS, Charneau P. A nonintegrative lentiviral vector-based vaccine provides long-term sterile protection against malaria. PLoS One 2012; 7:e48644. [PMID: 23133649 PMCID: PMC3487763 DOI: 10.1371/journal.pone.0048644] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2012] [Accepted: 09/27/2012] [Indexed: 01/06/2023] Open
Abstract
Trials testing the RTS,S candidate malaria vaccine and radiation-attenuated sporozoites (RAS) have shown that protective immunity against malaria can be induced and that an effective vaccine is not out of reach. However, longer-term protection and higher protection rates are required to eradicate malaria from the endemic regions. It implies that there is still a need to explore new vaccine strategies. Lentiviral vectors are very potent at inducing strong immunological memory. However their integrative status challenges their safety profile. Eliminating the integration step obviates the risk of insertional oncogenesis. Providing they confer sterile immunity, nonintegrative lentiviral vectors (NILV) hold promise as mass pediatric vaccine by meeting high safety standards. In this study, we have assessed the protective efficacy of NILV against malaria in a robust pre-clinical model. Mice were immunized with NILV encoding Plasmodium yoelii Circumsporozoite Protein (Py CSP) and challenged with sporozoites one month later. In two independent protective efficacy studies, 50% (37.5-62.5) of the animals were fully protected (p = 0.0072 and p = 0.0008 respectively when compared to naive mice). The remaining mice with detectable parasitized red blood cells exhibited a prolonged patency and reduced parasitemia. Moreover, protection was long-lasting with 42.8% sterile protection six months after the last immunization (p = 0.0042). Post-challenge CD8+ T cells to CSP, in contrast to anti-CSP antibodies, were associated with protection (r = -0.6615 and p = 0.0004 between the frequency of IFN-g secreting specific T cells in spleen and parasitemia). However, while NILV and RAS immunizations elicited comparable immunity to CSP, only RAS conferred 100% of sterile protection. Given that a better protection can be anticipated from a multi-antigen vaccine and an optimized vector design, NILV appear as a promising malaria vaccine.
Collapse
Affiliation(s)
- Frédéric Coutant
- Unité Virologie Moléculaire et Vaccinologie, Department of Virology, Institut Pasteur and CNRS URA3015, Institut Pasteur, Paris, France
| | - Raul Yusef Sanchez David
- Unité Virologie Moléculaire et Vaccinologie, Department of Virology, Institut Pasteur and CNRS URA3015, Institut Pasteur, Paris, France
| | - Tristan Félix
- Unité Virologie Moléculaire et Vaccinologie, Department of Virology, Institut Pasteur and CNRS URA3015, Institut Pasteur, Paris, France
| | - Aude Boulay
- Unité Virologie Moléculaire et Vaccinologie, Department of Virology, Institut Pasteur and CNRS URA3015, Institut Pasteur, Paris, France
| | - Laxmee Caleechurn
- Unité Virologie Moléculaire et Vaccinologie, Department of Virology, Institut Pasteur and CNRS URA3015, Institut Pasteur, Paris, France
| | - Philippe Souque
- Unité Virologie Moléculaire et Vaccinologie, Department of Virology, Institut Pasteur and CNRS URA3015, Institut Pasteur, Paris, France
| | - Catherine Thouvenot
- Centre de Production et d’Infection des Anophèles (CEPIA), Department of Parasitology and Mycology, Institut Pasteur, Paris, France
| | - Catherine Bourgouin
- Centre de Production et d’Infection des Anophèles (CEPIA), Department of Parasitology and Mycology, Institut Pasteur, Paris, France
| | - Anne-Sophie Beignon
- Unité Virologie Moléculaire et Vaccinologie, Department of Virology, Institut Pasteur and CNRS URA3015, Institut Pasteur, Paris, France
| | - Pierre Charneau
- Unité Virologie Moléculaire et Vaccinologie, Department of Virology, Institut Pasteur and CNRS URA3015, Institut Pasteur, Paris, France
| |
Collapse
|
14
|
Jaeger LB, Nath A. Modeling HIV-associated neurocognitive disorders in mice: new approaches in the changing face of HIV neuropathogenesis. Dis Model Mech 2012; 5:313-22. [PMID: 22563057 PMCID: PMC3339825 DOI: 10.1242/dmm.008763] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
It is well established that infection with the human immunodeficiency virus (HIV) leads to immune suppression. Less well known is the fact that long-term, progressive HIV disease is associated with the development of cognitive deficits. Since the introduction of combined antiretroviral therapy (cART), the clinical presentation of HIV infection has evolved into a chronic illness with very low levels of viral replication and chronic immune activation, with compliant affected individuals surviving for decades with a high quality of life. Despite these advances, many HIV-infected individuals develop some degree of neurodegeneration and cognitive impairment. The underlying pathophysiological mechanisms are not well understood, and there are no effective treatments. Thus, there is an unmet need for animal models that enable the study of HIV-associated neurocognitive disorders (HAND) and the testing of new therapeutic approaches to combat them. Here, we review the pros and cons of existing mouse models of HIV infection for addressing these aims and propose a detailed strategy for developing a new mouse model of HIV infection.
Collapse
Affiliation(s)
- Laura B Jaeger
- Section of Infections of the Nervous System, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892-1296, USA
| | | |
Collapse
|
15
|
Gorantla S, Poluektova L, Gendelman HE. Rodent models for HIV-associated neurocognitive disorders. Trends Neurosci 2012; 35:197-208. [PMID: 22305769 DOI: 10.1016/j.tins.2011.12.006] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2011] [Revised: 12/16/2011] [Accepted: 12/19/2011] [Indexed: 11/28/2022]
Abstract
Human immunodeficiency virus (HIV)-associated neurocognitive disorders (HAND) reflect the spectrum of neural impairments seen during chronic viral infection. Current research efforts focus on improving antiretroviral and adjunctive therapies, defining disease onset and progression, facilitating drug delivery, and halting neurodegeneration and viral resistance. Because HIV is species-specific, generating disease in small-animal models has proved challenging. After two decades of research, rodent HAND models now include those containing a human immune system. Antiviral responses, neuroinflammation and immunocyte blood-brain barrier (BBB) trafficking follow HIV infection in these rodent models. We review these and other rodent models of HAND and discuss their unmet potential in reflecting human pathobiology and in facilitating disease monitoring and therapeutic discoveries.
Collapse
Affiliation(s)
- Santhi Gorantla
- Center for Neurodegenerative Disorders and Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | | | | |
Collapse
|
16
|
Epidermal growth factor improves lentivirus vector gene transfer into primary mouse hepatocytes. Gene Ther 2011; 19:425-34. [PMID: 21850050 DOI: 10.1038/gt.2011.117] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Partial resistance of primary mouse hepatocytes to lentiviral (LV) vector transduction poses a challenge for ex vivo gene therapy protocols in models of monogenetic liver disease. We thus sought to optimize ex vivo LV gene transfer while preserving the hepatocyte integrity for subsequent transplantation into recipient animals. We found that culture media supplemented with epidermal growth factor (EGF) and, to a lesser extent, hepatocyte growth factor (HGF) markedly improved transduction efficacy at various multiplicities of infection. Up to 87% of primary hepatocytes were transduced in the presence of 10 ng EGF, compared with ~30% in standard culture medium (SCMs). The increased number of transgene-expressing cells correlated with increased nuclear import and more integrated pro-viral copies per cell. Higher LV transduction efficacy was not associated with proliferation, as transduction capacity of gammaretroviral vectors remained low (<1%). Finally, we developed an LV transduction protocol for short-term (maximum 24 h) adherent hepatocyte cultures. LV-transduced hepatocytes showed liver repopulation capacities similar to freshly isolated hepatocytes in alb-uPA mouse recipients. Our findings highlight the importance of EGF for efficient LV transduction of primary hepatocytes in culture and should facilitate studies of LV gene transfer in mouse models of monogenetic liver disease.
Collapse
|
17
|
Fadel HJ, Poeschla EM. Retroviral restriction and dependency factors in primates and carnivores. Vet Immunol Immunopathol 2011; 143:179-89. [PMID: 21715018 DOI: 10.1016/j.vetimm.2011.06.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Recent studies have extended the rapidly developing retroviral restriction factor field to cells of carnivore species. Carnivoran genomes, and the domestic cat genome in particular, are revealing intriguing properties vis-à-vis the primate and feline lentiviruses, not only with respect to their repertoires of virus-blocking restriction factors but also replication-enabling dependency factors. Therapeutic application of restriction factors is envisioned for human immunodeficiency virus (HIV) disease and the feline immunodeficiency virus (FIV) model has promise for testing important hypotheses at the basic and translational level. Feline cell-tropic HIV-1 clones have also been generated by a strategy of restriction factor evasion. We review progress in this area in the context of what is known about retroviral restriction factors such as TRIM5α, TRIMCyp, APOBEC3 proteins and BST-2/Tetherin.
Collapse
Affiliation(s)
- Hind J Fadel
- Department of Molecular Medicine and Division of Infectious Diseases, Mayo Clinic College of Medicine, Rochester, MN 55905, USA.
| | | |
Collapse
|
18
|
High natural permissivity of primary rabbit cells for HIV-1, with a virion infectivity defect in macrophages as the final replication barrier. J Virol 2010; 84:12300-14. [PMID: 20861260 DOI: 10.1128/jvi.01607-10] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
An immunocompetent, permissive, small-animal model would be valuable for the study of human immunodeficiency virus type 1 (HIV-1) pathogenesis and for the testing of drug and vaccine candidates. However, the development of such a model has been hampered by the inability of primary rodent cells to efficiently support several steps of the HIV-1 replication cycle. Although transgenesis of the HIV receptor complex and human cyclin T1 have been beneficial, additional late-phase blocks prevent robust replication of HIV-1 in rodents and limit the range of in vivo applications. In this study, we explored the HIV-1 susceptibility of rabbit primary T cells and macrophages. Envelope-specific and coreceptor-dependent entry of HIV-1 was achieved by expressing human CD4 and CCR5. A block of HIV-1 DNA synthesis, likely mediated by TRIM5, was overcome by limited changes to the HIV-1 gag gene. Unlike with mice and rats, primary cells from rabbits supported the functions of the regulatory viral proteins Tat and Rev, Gag processing, and the release of HIV-1 particles at levels comparable to those in human cells. While HIV-1 produced by rabbit T cells was highly infectious, a macrophage-specific infectivity defect became manifest by a complex pattern of mutations in the viral genome, only part of which were deamination dependent. These results demonstrate a considerable natural HIV-1 permissivity of the rabbit species and suggest that receptor complex transgenesis combined with modifications in gag and possibly vif of HIV-1 to evade species-specific restriction factors might render lagomorphs fully permissive to infection by this pathogenic human lentivirus.
Collapse
|
19
|
Maetzig T, Galla M, Brugman MH, Loew R, Baum C, Schambach A. Mechanisms controlling titer and expression of bidirectional lentiviral and gammaretroviral vectors. Gene Ther 2009; 17:400-11. [PMID: 19847204 DOI: 10.1038/gt.2009.129] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Bidirectional lentiviral vectors mediate expression of two or more cDNAs from a single internal promoter. In this study, we examined mechanisms that control titer and expression properties of this vector system. To address whether the bidirectional design depends on lentiviral (LV) backbone components, especially the Rev/Rev responsive element (RRE) system, we constructed similar expression cassettes for LV and gammaretroviral (GV) vectors. Bidirectional expression levels could be adjusted by the use of different internal promoters. Furthermore, removal of the constitutive RNA transport element of Mason-Pfizer monkey virus, used in first generation bidirectional LV vectors, improved gene expression. Titers of bidirectional vectors were approximately 10-fold reduced in comparison to unidirectional vectors, independent of the Rev/RRE interaction. We reasoned that titer reductions were due to the formation of interfering double-stranded RNA in packaging cells. Indeed, cotransfection of Nodamuravirus B2 protein, an RNA interference suppressor, increased bidirectional vector titers at least fivefold. We validated the potential of high titer bidirectional vectors by coexpressing a fluorescent marker with O(6)-methylguanine-DNA methyltransferase from integrating, or with Cre recombinase from integrating and non-integrating GV and LV backbones. This allowed for the tracking of chemoprotected and recombined cells by fluorescence marker expression.
Collapse
Affiliation(s)
- T Maetzig
- Department of Experimental Hematology, Hannover Medical School, Hannover, Germany
| | | | | | | | | | | |
Collapse
|
20
|
Van Duyne R, Pedati C, Guendel I, Carpio L, Kehn-Hall K, Saifuddin M, Kashanchi F. The utilization of humanized mouse models for the study of human retroviral infections. Retrovirology 2009; 6:76. [PMID: 19674458 PMCID: PMC2743631 DOI: 10.1186/1742-4690-6-76] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2009] [Accepted: 08/12/2009] [Indexed: 01/10/2023] Open
Abstract
The development of novel techniques and systems to study human infectious diseases in both an in vitro and in vivo settings is always in high demand. Ideally, small animal models are the most efficient method of studying human afflictions. This is especially evident in the study of the human retroviruses, HIV-1 and HTLV-1, in that current simian animal models, though robust, are often expensive and difficult to maintain. Over the past two decades, the construction of humanized animal models through the transplantation and engraftment of human tissues or progenitor cells into immunocompromised mouse strains has allowed for the development of a reconstituted human tissue scaffold in a small animal system. The utilization of small animal models for retroviral studies required expansion of the early CB-17 scid/scid mouse resulting in animals demonstrating improved engraftment efficiency and infectivity. The implantation of uneducated human immune cells and associated tissue provided the basis for the SCID-hu Thy/Liv and hu-PBL-SCID models. Engraftment efficiency of these tissues was further improved through the integration of the non-obese diabetic (NOD) mutation leading to the creation of NODSCID, NOD/Shi-scid IL2rγ-/-, and NOD/SCID β2-microglobulinnull animals. Further efforts at minimizing the response of the innate murine immune system produced the Rag2-/-γc-/- model which marked an important advancement in the use of human CD34+ hematopoietic stem cells. Together, these animal models have revolutionized the investigation of retroviral infections in vivo.
Collapse
Affiliation(s)
- Rachel Van Duyne
- Department of Microbiology, Immunology, and Tropical Medicine, The George Washington University School of Medicine, Washington, DC 20037, USA.
| | | | | | | | | | | | | |
Collapse
|
21
|
Müller B, Anders M, Akiyama H, Welsch S, Glass B, Nikovics K, Clavel F, Tervo HM, Keppler OT, Kräusslich HG. HIV-1 Gag processing intermediates trans-dominantly interfere with HIV-1 infectivity. J Biol Chem 2009; 284:29692-703. [PMID: 19666477 DOI: 10.1074/jbc.m109.027144] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Protease inhibitors (PI) act by blocking human immunodeficiency virus (HIV) polyprotein processing, but there is no direct quantitative correlation between the degree of impairment of Gag processing and virion infectivity at low PI concentrations. To analyze the consequences of partial processing, virus particles were produced in the presence of limiting PI concentrations or by co-transfection of wild-type proviral plasmids with constructs carrying mutations in one or more cleavage sites. Low PI concentrations caused subtle changes in polyprotein processing associated with a pronounced reduction of particle infectivity. Dissection of individual stages of viral entry indicated a block in accumulation of reverse transcriptase products, whereas virus entry, enzymatic reverse transcriptase activity, and replication steps following reverse transcription were not affected. Co-expression of low amounts of partially processed forms of Gag together with wild-type HIV generally exerted a trans-dominant effect, which was most prominent for a construct carrying mutations at both cleavage sites flanking the CA domain. Interestingly, co-expression of low amounts of Gag mutated at the CA-SP1 cleavage site also affected processing activity at this site in the wild-type virus. The results indicate that low amounts (<5%) of Gag processing intermediates can display a trans-dominant effect on HIV particle maturation, with the maturation cleavage between CA and SP1 being of particular importance. These effects are likely to be important for the strong activity of PI at concentrations achieved in vivo and also bear relevance for the mechanism of action of the antiviral drug bevirimat.
Collapse
Affiliation(s)
- Barbara Müller
- Department of Virology, Universitätsklinikum Heidelberg, Im Neuenheimer Feld 324, D-69120 Heidelberg, Germany.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Okada H, Zhang X, Ben Fofana I, Nagai M, Suzuki H, Ohashi T, Shida H. Synergistic effect of human CycT1 and CRM1 on HIV-1 propagation in rat T cells and macrophages. Retrovirology 2009; 6:43. [PMID: 19435492 PMCID: PMC2693497 DOI: 10.1186/1742-4690-6-43] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2008] [Accepted: 05/12/2009] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND In vivo studies of HIV-1 pathogenesis and testing of antiviral strategies have been hampered by the lack of an immunocompetent small animal model that is highly susceptible to HIV-1 infection. Although transgenic rats that express the HIV-1 receptor complex hCD4 and hCCR5 are susceptible to infection, HIV-1 replicates very poorly in these animals. To demonstrate the molecular basis for developing a better rat model for HIV-1 infection, we evaluated the effect of human CyclinT1 (hCycT1) and CRM1 (hCRM1) on Gag p24 production in rat T cells and macrophages using both established cell lines and primary cells prepared from hCycT1/hCRM1 transgenic rats. RESULTS Expression of hCycT1 augmented Gag production 20-50 fold in rat T cells, but had little effect in macrophages. Expression of hCRM1 enhanced Gag production 10-15 fold in macrophages, but only marginally in T cells. Expression of both factors synergistically enhanced p24 production to levels approximately 10-40% of those detected in human cells. R5 viruses produced in rat T cells and macrophages were fully infectious. CONCLUSION The expression of both hCycT1 and hCRM1 appears to be fundamental to developing a rat model that supports robust propagation of HIV-1.
Collapse
Affiliation(s)
- Hiroyuki Okada
- Institute for Genetic Medicine, Hokkaido University, Kita-ku, Sapporo 060-0815, Japan
| | - Xianfeng Zhang
- Institute for Genetic Medicine, Hokkaido University, Kita-ku, Sapporo 060-0815, Japan
| | - Ismael Ben Fofana
- Institute for Genetic Medicine, Hokkaido University, Kita-ku, Sapporo 060-0815, Japan
- Microbiology Division, New England Primate Research Center, Harvard Medical School, One Pine Hill Drive, Southborough, Maryland 01772, USA
| | - Mika Nagai
- Institute for Genetic Medicine, Hokkaido University, Kita-ku, Sapporo 060-0815, Japan
| | - Hajime Suzuki
- Institute for Genetic Medicine, Hokkaido University, Kita-ku, Sapporo 060-0815, Japan
| | - Takashi Ohashi
- Institute for Genetic Medicine, Hokkaido University, Kita-ku, Sapporo 060-0815, Japan
| | - Hisatoshi Shida
- Institute for Genetic Medicine, Hokkaido University, Kita-ku, Sapporo 060-0815, Japan
| |
Collapse
|