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Gaudin R, de Alencar BC, Arhel N, Benaroch P. HIV trafficking in host cells: motors wanted! Trends Cell Biol 2013; 23:652-62. [PMID: 24119663 DOI: 10.1016/j.tcb.2013.09.004] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Revised: 09/05/2013] [Accepted: 09/09/2013] [Indexed: 11/16/2022]
Abstract
Throughout the viral replication cycle, viral proteins, complexes, and particles need to be transported within host cells. These transport events are dependent on the host cell cytoskeleton and molecular motors. However, the mechanisms by which virus is trafficked along cytoskeleton filaments and how molecular motors are recruited and regulated to guarantee successful integration of the viral genome and production of new viruses has only recently begun to be understood. Recent studies on HIV have identified specific molecular motors involved in the trafficking of these viral particles. Here we review recent literature on the transport of HIV components in the cell, provide evidence for the identity and role of molecular motors in this process, and highlight how these trafficking events may be related to those occurring with other viruses.
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Affiliation(s)
- Raphaël Gaudin
- Institut Curie, Centre de Recherche, 26 rue d'Ulm, 75248 Paris Cedex 05, France; INSERM, U932, 26 rue d'Ulm, 75248 Paris Cedex 05, France
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52
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Non-catalytic site HIV-1 integrase inhibitors disrupt core maturation and induce a reverse transcription block in target cells. PLoS One 2013; 8:e74163. [PMID: 24040198 PMCID: PMC3767657 DOI: 10.1371/journal.pone.0074163] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2013] [Accepted: 07/29/2013] [Indexed: 12/24/2022] Open
Abstract
HIV-1 integrase (IN) is the target for two classes of antiretrovirals: i) the integrase strand-transfer inhibitors (INSTIs) and ii) the non-catalytic site integrase inhibitors (NCINIs). NCINIs bind at the IN dimer interface and are thought to interfere primarily with viral DNA (vDNA) integration in the target cell by blocking IN-vDNA assembly as well as the IN-LEDGF/p75 interaction. Herein we show that treatment of virus-producing cells, but not of mature virions or target cells, drives NCINI antiviral potency. NCINIs target an essential late-stage event in HIV replication that is insensitive to LEDGF levels in the producer cells. Virus particles produced in the presence of NCINIs displayed normal Gag-Pol processing and endogenous reverse transcriptase activity, but were defective at initiating vDNA synthesis following entry into the target cell. NCINI-resistant virus carrying a T174I mutation in the IN dimer interface was less sensitive to the compound-induced late-stage effects, including the reverse transcription block. Wild-type, but not T174I virus, produced in the presence of NCINIs exhibited striking defects in core morphology and an increased level of IN oligomers that was not observed upon treatment of mature cell-free particles. Collectively, these results reveal that NCINIs act through a novel mechanism that is unrelated to the previously observed inhibition of IN activity or IN-LEDGF interaction, and instead involves the disruption of an IN function during HIV-1 core maturation and assembly.
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53
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Banerjee A, Benjamin R, Banerjee S. Impact of viral factors on subcellular distribution and RNA export activity of HIV-1 rev in astrocytes 1321N1. PLoS One 2013; 8:e72905. [PMID: 24023789 PMCID: PMC3762830 DOI: 10.1371/journal.pone.0072905] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Accepted: 07/14/2013] [Indexed: 02/05/2023] Open
Abstract
CNS associated cells are permissive to HIV-1 infection, but poor in virus production due to attenuated Rev activity. The temporal and the spatial distribution of Rev in human astrocyte 1321N1 and glioblastoma GO-G-CCM were monitored for explaining the reduced Rev activity and low viral production during HIV-1 infection. Rev remained localized to the nuclei of these cells upon infection, attenuating its export activity, as manifested by low copy number of RRE-containing viral-mRNA in the cytoplasm of these cells. In contrast to infection, when Rev alone was transiently expressed, it localized in the cytoplasm of 1321N1. The localization changed to the nucleus when Rev was expressed in the presence of other viral proteins through pro-viral DNA pNL4-3. This study, for the first time, revealed the impact of other HIV-1 proteins apart from host factors in regulating the subcellular localization of Rev in astrocytes and hence the fate of HIV-1 infection in these cells.
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Affiliation(s)
- Atoshi Banerjee
- Department of Biochemistry, School of Life Sciences, University of Hyderabad, Hyderabad, Andhra Pradesh, India
| | - Ronald Benjamin
- Department of Biochemistry, School of Life Sciences, University of Hyderabad, Hyderabad, Andhra Pradesh, India
| | - Sharmistha Banerjee
- Department of Biochemistry, School of Life Sciences, University of Hyderabad, Hyderabad, Andhra Pradesh, India
- * E-mail:
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Manic G, Maurin-Marlin A, Laurent F, Vitale I, Thierry S, Delelis O, Dessen P, Vincendeau M, Leib-Mösch C, Hazan U, Mouscadet JF, Bury-Moné S. Impact of the Ku complex on HIV-1 expression and latency. PLoS One 2013; 8:e69691. [PMID: 23922776 PMCID: PMC3726783 DOI: 10.1371/journal.pone.0069691] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Accepted: 06/17/2013] [Indexed: 01/20/2023] Open
Abstract
Ku, a cellular complex required for human cell survival and involved in double strand break DNA repair and multiple other cellular processes, may modulate retroviral multiplication, although the precise mechanism through which it acts is still controversial. Recently, Ku was identified as a possible anti-human immunodeficiency virus type 1 (HIV-1) target in human cells, in two global approaches. Here we investigated the role of Ku on the HIV-1 replication cycle by analyzing the expression level of a panel of non-replicative lentiviral vectors expressing the green fluorescent protein in human colorectal carcinoma HCT 116 cells, stably or transiently depleted of Ku. We found that in this cellular model the depletion of Ku did not affect the efficiency of (pre-)integrative steps but decreased the early HIV-1 expression by acting at the transcriptional level. This negative effect was specific of the HIV-1 promoter, required the obligatory step of viral DNA integration and was reversed by transient depletion of p53. We also provided evidence on a direct binding of Ku to HIV-1 LTR in transduced cells. Ku not only promotes the early transcription from the HIV-1 promoter, but also limits the constitution of viral latency. Moreover, in the presence of a normal level of Ku, HIV-1 expression was gradually lost over time, likely due to the counter-selection of HIV-1-expressing cells. On the contrary, the reactivation of transgene expression from HIV-1 by means of trichostatin A- or tumor necrosis factor α-administration was enhanced under condition of Ku haplodepletion, suggesting a phenomenon of provirus latency. These observations plead in favor of the hypothesis that Ku has an impact on HIV-1 expression and latency at early- and mid-time after integration.
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Affiliation(s)
- Gwenola Manic
- Laboratoire de Biologie et Pharmacologie Appliquée, Centre national de la recherche scientifique-UMR8113, Ecole Normale Supérieure de Cachan, Cachan, France
| | - Aurélie Maurin-Marlin
- Laboratoire de Biologie et Pharmacologie Appliquée, Centre national de la recherche scientifique-UMR8113, Ecole Normale Supérieure de Cachan, Cachan, France
| | - Fanny Laurent
- Laboratoire de Biologie et Pharmacologie Appliquée, Centre national de la recherche scientifique-UMR8113, Ecole Normale Supérieure de Cachan, Cachan, France
| | - Ilio Vitale
- Regina Elena National Cancer Institute, Rome, Italy
- National Institute of Health, Rome, Italy
| | - Sylvain Thierry
- Laboratoire de Biologie et Pharmacologie Appliquée, Centre national de la recherche scientifique-UMR8113, Ecole Normale Supérieure de Cachan, Cachan, France
| | - Olivier Delelis
- Laboratoire de Biologie et Pharmacologie Appliquée, Centre national de la recherche scientifique-UMR8113, Ecole Normale Supérieure de Cachan, Cachan, France
| | - Philippe Dessen
- Institut Gustave Roussy, Villejuif, France
- Institut National de la Santé et de la Recherche Médicale-U985, Villejuif, France
| | - Michelle Vincendeau
- Institute of Virology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
- Research Unit Cellular Signal Integration, Institute of Molecular Toxicology and Pharmacology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Christine Leib-Mösch
- Institute of Virology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
- Department of Hematology and Oncology, Mannheim Medical Center, University of Heidelberg, Mannheim, Germany
| | - Uriel Hazan
- Laboratoire de Biologie et Pharmacologie Appliquée, Centre national de la recherche scientifique-UMR8113, Ecole Normale Supérieure de Cachan, Cachan, France
| | - Jean-François Mouscadet
- Laboratoire de Biologie et Pharmacologie Appliquée, Centre national de la recherche scientifique-UMR8113, Ecole Normale Supérieure de Cachan, Cachan, France
| | - Stéphanie Bury-Moné
- Laboratoire de Biologie et Pharmacologie Appliquée, Centre national de la recherche scientifique-UMR8113, Ecole Normale Supérieure de Cachan, Cachan, France
- * E-mail:
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55
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Iordanskiy S, Santos S, Bukrinsky M. Nature, nurture and HIV: The effect of producer cell on viral physiology. Virology 2013; 443:208-13. [PMID: 23747196 DOI: 10.1016/j.virol.2013.05.023] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Revised: 04/23/2013] [Accepted: 05/15/2013] [Indexed: 01/13/2023]
Abstract
Macrophages and CD4-positive T lymphocytes are the major targets and producers of HIV-1. While the molecular details underlying HIV replication in macrophages and T cells become better understood, it remains unclear whether viruses produced by these target cells differ in their biological properties. Recent reports suggest that HIV virions incorporate a large number of producer cell proteins and lipids which have an effect on subsequent viral replication in newly infected cells. The identity and abundance of these incorporated factors varies between different types of producer cells, suggesting that they may influence the replication capacity and pathogenic activity of the virions produced by T cells and macrophages.
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Affiliation(s)
- Sergey Iordanskiy
- Department of Microbiology, Immunology and Tropical Medicine, School of Medicine and Health Sciences, George Washington University, 2300 I Street NW, Ross Hall, Washington, DC 20037, USA.
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Segura MM, Mangion M, Gaillet B, Garnier A. New developments in lentiviral vector design, production and purification. Expert Opin Biol Ther 2013; 13:987-1011. [PMID: 23590247 DOI: 10.1517/14712598.2013.779249] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
INTRODUCTION Lentiviruses are a very potent class of viral vectors for which there is presently a rapidly growing interest for a number of gene therapy. However, their construction, production and purification need to be performed according to state-of-the-art techniques in order to obtain sufficient quantities of high purity material of any usefulness and safety. AREAS COVERED The recent advances in the field of recombinant lentivirus vector design, production and purification will be reviewed with an eye toward its utilization for gene therapy. Such a review should be helpful for the potential user of this technology. EXPERT OPINION The principal hurdles toward the use of recombinant lentivirus as a gene therapy vector are the low titer at which it is produced as well as the difficulty to purify it at an acceptable level without degrading it. The recent advances in the bioproduction of this vector suggest these issues are about to be resolved, making the retrovirus gene therapy a mature technology.
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Affiliation(s)
- Maria Mercedes Segura
- Chemical Engineering Department, Universitat Autònoma de Barcelona, Campus Bellaterra, Cerdanyola del Vallès (08193), Barcelona, Spain
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57
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Bell NM, Lever AML. HIV Gag polyprotein: processing and early viral particle assembly. Trends Microbiol 2013; 21:136-44. [PMID: 23266279 DOI: 10.1016/j.tim.2012.11.006] [Citation(s) in RCA: 150] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2012] [Revised: 11/22/2012] [Accepted: 11/29/2012] [Indexed: 12/22/2022]
Affiliation(s)
- Neil M Bell
- Department of Medicine, University of Cambridge, Level 5, Addenbrooke's Hospital, Hills Road, Cambridge CB2 2QQ, UK
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58
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Joshi P, Sloan B, Torbett BE, Stoddart CA. Heat shock protein 90AB1 and hyperthermia rescue infectivity of HIV with defective cores. Virology 2013; 436:162-72. [PMID: 23200770 PMCID: PMC3563299 DOI: 10.1016/j.virol.2012.11.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Revised: 10/25/2012] [Accepted: 11/10/2012] [Indexed: 12/15/2022]
Abstract
We previously showed that reduced infectivity of HIV with incompletely processed capsid-spacer protein 1 (CA-SP1) is rescued by cellular activation or increased expression of HSP90AB1, a member of the cytosolic heat shock protein 90 family. Here we show that HSP90AB1 is present in HIV virions and that HSP90AB1, but not nonfunctional mutated HSP90AB1(E42A+D88A), restores infectivity to HIV with mutations in CA that alter core stability. Further, the CA mutants were hypersensitive to pharmacological inhibition of HSP90AB1. In agreement with Roesch et al. (2012), we found that culturing HIV at 39.5°C enhanced viral infectivity up to 30-fold in human peripheral blood mononuclear cells (p=0.002) and rescued CA-mutant infectivity in nonactivated cells, concurrent with elevated expression of HSP90AB1 during hyperthermia. In sum, the transdominant effect of HSP90AB1 on CA-mutant HIV infectivity suggests a potential role for this class of cellular chaperones in HIV core stability and uncoating.
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Affiliation(s)
- Pheroze Joshi
- Division of Experimental Medicine, Department of Medicine, San Francisco General Hospital, University of California, San Francisco, San Francisco, CA 94110, USA
| | - Barbara Sloan
- Division of Experimental Medicine, Department of Medicine, San Francisco General Hospital, University of California, San Francisco, San Francisco, CA 94110, USA
| | - Bruce E. Torbett
- Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Cheryl A. Stoddart
- Division of Experimental Medicine, Department of Medicine, San Francisco General Hospital, University of California, San Francisco, San Francisco, CA 94110, USA
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Lorgeoux RP, Guo F, Liang C. From promoting to inhibiting: diverse roles of helicases in HIV-1 Replication. Retrovirology 2012; 9:79. [PMID: 23020886 PMCID: PMC3484045 DOI: 10.1186/1742-4690-9-79] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2011] [Accepted: 09/22/2012] [Indexed: 01/09/2023] Open
Abstract
Helicases hydrolyze nucleotide triphosphates (NTPs) and use the energy to modify the structures of nucleic acids. They are key players in every cellular process involving RNA or DNA. Human immunodeficiency virus type 1 (HIV-1) does not encode a helicase, thus it has to exploit cellular helicases in order to efficiently replicate its RNA genome. Indeed, several helicases have been found to specifically associate with HIV-1 and promote viral replication. However, studies have also revealed a couple of helicases that inhibit HIV-1 replication; these findings suggest that HIV-1 can either benefit from the function of cellular helicases or become curtailed by these enzymes. In this review, we focus on what is known about how a specific helicase associates with HIV-1 and how a distinct step of HIV-1 replication is affected. Despite many helicases having demonstrated roles in HIV-1 replication and dozens of other helicase candidates awaiting to be tested, a deeper appreciation of their involvement in the HIV-1 life cycle is hindered by our limited knowledge at the enzymatic and molecular levels regarding how helicases shape the conformation and structure of viral RNA-protein complexes and how these conformational changes are translated into functional outcomes in the context of viral replication.
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Affiliation(s)
- Rene-Pierre Lorgeoux
- McGill AIDS Centre, Lady Davis Institute-Jewish General Hospital, Montreal, H3T 1E2, Quebec, Canada
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