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Pitchai FNN, Tanner EJ, Khetan N, Vasen G, Levrel C, Kumar AJ, Pandey S, Ordonez T, Barnette P, Spencer D, Jung SY, Glazier J, Thompson C, Harvey-Vera A, Son HI, Son HI, Strathdee SA, Holguin L, Urak R, Burnett J, Burgess W, Busman-Sahay K, Estes JD, Hessell A, Fennessey CM, Keele BF, Haigwood NL, Weinberger LS. Engineered deletions of HIV replicate conditionally to reduce disease in nonhuman primates. Science 2024; 385:eadn5866. [PMID: 39116226 DOI: 10.1126/science.adn5866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Accepted: 06/06/2024] [Indexed: 08/10/2024]
Abstract
Antiviral therapies with reduced frequencies of administration and high barriers to resistance remain a major goal. For HIV, theories have proposed that viral-deletion variants, which conditionally replicate with a basic reproductive ratio [R0] > 1 (termed "therapeutic interfering particles" or "TIPs"), could parasitize wild-type virus to constitute single-administration, escape-resistant antiviral therapies. We report the engineering of a TIP that, in rhesus macaques, reduces viremia of a highly pathogenic model of HIV by >3log10 following a single intravenous injection. Animal lifespan was significantly extended, TIPs conditionally replicated and were continually detected for >6 months, and sequencing data showed no evidence of viral escape. A single TIP injection also suppressed virus replication in humanized mice and cells from persons living with HIV. These data provide proof of concept for a potential new class of single-administration antiviral therapies.
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Affiliation(s)
- Fathima N Nagoor Pitchai
- Gladstone Center for Cell Circuitry, University of California, San Francisco, CA, USA
- Gladstone Institute of Virology, University of California, San Francisco, CA, USA
| | - Elizabeth J Tanner
- Gladstone Center for Cell Circuitry, University of California, San Francisco, CA, USA
- Gladstone Institute of Virology, University of California, San Francisco, CA, USA
| | - Neha Khetan
- Gladstone Center for Cell Circuitry, University of California, San Francisco, CA, USA
- Gladstone Institute of Virology, University of California, San Francisco, CA, USA
| | - Gustavo Vasen
- Gladstone Center for Cell Circuitry, University of California, San Francisco, CA, USA
- Gladstone Institute of Virology, University of California, San Francisco, CA, USA
| | - Clara Levrel
- Gladstone Center for Cell Circuitry, University of California, San Francisco, CA, USA
- Gladstone Institute of Virology, University of California, San Francisco, CA, USA
| | - Arjun J Kumar
- Gladstone Center for Cell Circuitry, University of California, San Francisco, CA, USA
- Gladstone Institute of Virology, University of California, San Francisco, CA, USA
- Department of Bioengineering, University of Washington, Seattle, WA, USA
| | - Shilpi Pandey
- Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, USA
| | - Tracy Ordonez
- Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, USA
| | - Philip Barnette
- Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, USA
| | - David Spencer
- Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, USA
- Absci Corporation, Vancouver, WA, USA
| | - Seung-Yong Jung
- Gladstone Center for Cell Circuitry, University of California, San Francisco, CA, USA
| | - Joshua Glazier
- Gladstone Center for Cell Circuitry, University of California, San Francisco, CA, USA
| | - Cassandra Thompson
- Gladstone Center for Cell Circuitry, University of California, San Francisco, CA, USA
- Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, MO, USA
| | | | - Hye-In Son
- Global Health Sciences, Department of Medicine, University of California San Diego, La Jolla, CA, USA
- US-Mexico Border Health Commission, Tijuana, Mexico
- Vaccine and Gene Therapy Institute, Oregon Health & Science University, Beaverton, OR, USA
| | - Hye-In Son
- Gladstone Center for Cell Circuitry, University of California, San Francisco, CA, USA
| | - Steffanie A Strathdee
- Global Health Sciences, Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Leo Holguin
- Global Health Sciences, Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Ryan Urak
- Center for Gene Therapy, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA, USA
| | - John Burnett
- Center for Gene Therapy, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA, USA
- Department of Microbiology and Immunology, Miller School of Medicine, University of Miami, Miami, FL, USA
| | - William Burgess
- Vaccine and Gene Therapy Institute, Oregon Health & Science University, Beaverton, OR, USA
| | - Kathleen Busman-Sahay
- Vaccine and Gene Therapy Institute, Oregon Health & Science University, Beaverton, OR, USA
| | - Jacob D Estes
- Vaccine and Gene Therapy Institute, Oregon Health & Science University, Beaverton, OR, USA
- Faculty of Health, Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
- School of Health and Biomedical Sciences College of Science, Engineering and Health RMIT University, Melbourne, Australia
| | - Ann Hessell
- Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, USA
| | - Christine M Fennessey
- AIDS and Cancer Virus Program, Frederick National Laboratory for Cancer Research, Frederick, MD, USA
| | - Brandon F Keele
- AIDS and Cancer Virus Program, Frederick National Laboratory for Cancer Research, Frederick, MD, USA
| | - Nancy L Haigwood
- Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, USA
| | - Leor S Weinberger
- Gladstone Center for Cell Circuitry, University of California, San Francisco, CA, USA
- Gladstone Institute of Virology, University of California, San Francisco, CA, USA
- Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, CA, USA
- Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA, USA
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2
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Armani-Tourret M, Zhou Z, Gasser R, Staropoli I, Cantaloube-Ferrieu V, Benureau Y, Garcia-Perez J, Pérez-Olmeda M, Lorin V, Puissant-Lubrano B, Assoumou L, Delaugerre C, Lelièvre JD, Lévy Y, Mouquet H, Martin-Blondel G, Alcami J, Arenzana-Seisdedos F, Izopet J, Colin P, Lagane B. Mechanisms of HIV-1 evasion to the antiviral activity of chemokine CXCL12 indicate potential links with pathogenesis. PLoS Pathog 2021; 17:e1009526. [PMID: 33872329 PMCID: PMC8084328 DOI: 10.1371/journal.ppat.1009526] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 04/29/2021] [Accepted: 04/01/2021] [Indexed: 02/07/2023] Open
Abstract
HIV-1 infects CD4 T lymphocytes (CD4TL) through binding the chemokine receptors CCR5 or CXCR4. CXCR4-using viruses are considered more pathogenic, linked to accelerated depletion of CD4TL and progression to AIDS. However, counterexamples to this paradigm are common, suggesting heterogeneity in the virulence of CXCR4-using viruses. Here, we investigated the role of the CXCR4 chemokine CXCL12 as a driving force behind virus virulence. In vitro, CXCL12 prevents HIV-1 from binding CXCR4 and entering CD4TL, but its role in HIV-1 transmission and propagation remains speculative. Through analysis of thirty envelope glycoproteins (Envs) from patients at different stages of infection, mostly treatment-naïve, we first interrogated whether sensitivity of viruses to inhibition by CXCL12 varies over time in infection. Results show that Envs resistant (RES) to CXCL12 are frequent in patients experiencing low CD4TL levels, most often late in infection, only rarely at the time of primary infection. Sensitivity assays to soluble CD4 or broadly neutralizing antibodies further showed that RES Envs adopt a more closed conformation with distinct antigenicity, compared to CXCL12-sensitive (SENS) Envs. At the level of the host cell, our results suggest that resistance is not due to improved fusion or binding to CD4, but owes to viruses using particular CXCR4 molecules weakly accessible to CXCL12. We finally asked whether the low CD4TL levels in patients are related to increased pathogenicity of RES viruses. Resistance actually provides viruses with an enhanced capacity to enter naive CD4TL when surrounded by CXCL12, which mirrors their situation in lymphoid organs, and to deplete bystander activated effector memory cells. Therefore, RES viruses seem more likely to deregulate CD4TL homeostasis. This work improves our understanding of the pathophysiology and the transmission of HIV-1 and suggests that RES viruses' receptors could represent new therapeutic targets to help prevent CD4TL depletion in HIV+ patients on cART.
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Affiliation(s)
| | - Zhicheng Zhou
- Viral Pathogenesis Unit, Department of Virology, INSERM U1108, Institut Pasteur, Paris, France
| | - Romain Gasser
- Infinity, Université Toulouse, CNRS, INSERM, UPS, Toulouse, France
| | - Isabelle Staropoli
- Viral Pathogenesis Unit, Department of Virology, INSERM U1108, Institut Pasteur, Paris, France
| | | | - Yann Benureau
- Viral Pathogenesis Unit, Department of Virology, INSERM U1108, Institut Pasteur, Paris, France
| | | | - Mayte Pérez-Olmeda
- AIDS Immunopathogenesis Unit, Instituto de Salud Carlos III, Madrid, Spain
| | - Valérie Lorin
- Laboratory of Humoral Immunology, Department of Immunology, INSERM U1222, Institut Pasteur, Paris, France
| | | | - Lambert Assoumou
- INSERM, Sorbonne Université, Institut Pierre Louis d’Epidémiologie et de Santé Publique (IPLESP), Paris, France
| | | | | | - Yves Lévy
- Vaccine Research Institute, INSERM and APHP, Hôpital H. Mondor, Créteil, France
| | - Hugo Mouquet
- Laboratory of Humoral Immunology, Department of Immunology, INSERM U1222, Institut Pasteur, Paris, France
| | - Guillaume Martin-Blondel
- Infinity, Université Toulouse, CNRS, INSERM, UPS, Toulouse, France
- CHU de Toulouse, Service des Maladies Infectieuses et Tropicales, Toulouse, France
| | - Jose Alcami
- AIDS Immunopathogenesis Unit, Instituto de Salud Carlos III, Madrid, Spain
| | | | - Jacques Izopet
- Infinity, Université Toulouse, CNRS, INSERM, UPS, Toulouse, France
- CHU de Toulouse, Laboratoire de virologie, Toulouse, France
| | - Philippe Colin
- Infinity, Université Toulouse, CNRS, INSERM, UPS, Toulouse, France
| | - Bernard Lagane
- Infinity, Université Toulouse, CNRS, INSERM, UPS, Toulouse, France
- * E-mail:
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Zhang Y, Li Q, Hou P, Lu Y, Yang H, Lin X, Su C, Wei Y, Yang X, Yang H, Zhao X, Chen X. Transcription-Related Dynamics from Immune Disability into Endogenous Innovation. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1900767. [PMID: 31832307 PMCID: PMC6891922 DOI: 10.1002/advs.201900767] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 08/13/2019] [Indexed: 02/05/2023]
Abstract
So far, thymus involution in adults is believed to be irreversible, and endogenous innovation for thymus-related immunodeficiency remains to be an intractable puzzle. With the expectation of addressing this dilemma, human ovarian surface epithelium (OSE) has been reengineered as epithelial-mesenchymal transition (EMT)-tridimensional-spheroid biologics (ETSB) using a dynamic EMT-3D-floating system along with 160 Gy X-ray-amelioration, which inoculates subcutaneously into aging rhesus and athymic Balb/c nu/nu mice. Herein, it is bioinformatically validated that ETSB can reset Clock/Arntl-Per3/Tim molecule rhythm dynamics to re-prime thymus residual (parathyroid or fatty-like invalid vesicles yet no thymic architecture) to evolutionary transcription with overall cortex-medulla endogenized by TECs undergoing MET/EMT reversion. Rhythm dynamics immediately resettles the bHLH-LTβR-NFκB-RelA/B loop as a cascade to provoke the core immune microenvironment for multifunctional innovation of dynamic TCR orchestration, with harmonious naïve T-subsets and TRECs renewals (P < 0.005). Subsequently, peripheral biological burden and tumor metastasis dynamics are addressed by innovative TCR-defense/attack dynamics quickly (P < 0.005 vs Control), yet without autoimmune indication to hosts. Moreover, a functional blockade of core-rhythm dynamics deeply impedes the endogenous innovation of invalid thymus residual. Thus this study may help pioneer a prospective strategy to innovate panoramic central-peripheral immune microenvironments and defense dynamics for immune-deficient/aging victims.
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Affiliation(s)
- Yanna Zhang
- State Key Laboratory of Biotherapy/Collaborative Innovation Center for BiotherapyWest China HospitalSichuan UniversityKeyuan Road 4 No. 1, High Technological Development ZoneChengduSichuan610041P. R. China
| | - Qian Li
- State Key Laboratory of Biotherapy/Collaborative Innovation Center for BiotherapyWest China HospitalSichuan UniversityKeyuan Road 4 No. 1, High Technological Development ZoneChengduSichuan610041P. R. China
| | - Panyan Hou
- State Key Laboratory of Biotherapy/Collaborative Innovation Center for BiotherapyWest China HospitalSichuan UniversityKeyuan Road 4 No. 1, High Technological Development ZoneChengduSichuan610041P. R. China
| | - Yanan Lu
- State Key Laboratory of Biotherapy/Collaborative Innovation Center for BiotherapyWest China HospitalSichuan UniversityKeyuan Road 4 No. 1, High Technological Development ZoneChengduSichuan610041P. R. China
| | - Huanhuan Yang
- Department of Gynecology & ObstetricsWest China Hospital/Second HospitalSichuan UniversityNo 20, Section 3, South Renmin RoadChengduSichuan610041P. R. China
| | - Xiaojuan Lin
- Department of Gynecology & ObstetricsWest China Hospital/Second HospitalSichuan UniversityNo 20, Section 3, South Renmin RoadChengduSichuan610041P. R. China
| | - Chao Su
- State Key Laboratory of Biotherapy/Collaborative Innovation Center for BiotherapyWest China HospitalSichuan UniversityKeyuan Road 4 No. 1, High Technological Development ZoneChengduSichuan610041P. R. China
| | - Yuquan Wei
- State Key Laboratory of Biotherapy/Collaborative Innovation Center for BiotherapyWest China HospitalSichuan UniversityKeyuan Road 4 No. 1, High Technological Development ZoneChengduSichuan610041P. R. China
| | - Xiulin Yang
- State Key Laboratory of Biotherapy/Collaborative Innovation Center for BiotherapyWest China HospitalSichuan UniversityKeyuan Road 4 No. 1, High Technological Development ZoneChengduSichuan610041P. R. China
| | - Hanshuo Yang
- State Key Laboratory of Biotherapy/Collaborative Innovation Center for BiotherapyWest China HospitalSichuan UniversityKeyuan Road 4 No. 1, High Technological Development ZoneChengduSichuan610041P. R. China
| | - Xia Zhao
- Department of Gynecology & ObstetricsWest China Hospital/Second HospitalSichuan UniversityNo 20, Section 3, South Renmin RoadChengduSichuan610041P. R. China
| | - Xiancheng Chen
- State Key Laboratory of Biotherapy/Collaborative Innovation Center for BiotherapyWest China HospitalSichuan UniversityKeyuan Road 4 No. 1, High Technological Development ZoneChengduSichuan610041P. R. China
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4
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Tsukamoto T. HIV Impacts CD34 + Progenitors Involved in T-Cell Differentiation During Coculture With Mouse Stromal OP9-DL1 Cells. Front Immunol 2019; 10:81. [PMID: 30761146 PMCID: PMC6361802 DOI: 10.3389/fimmu.2019.00081] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Accepted: 01/11/2019] [Indexed: 12/21/2022] Open
Abstract
HIV-1 causes the loss of CD4+ T cells via depletion or impairment of their production. The latter involves infection of thymocytes, but the involvement of hematopoietic CD34+ cells remains unclear even though HIV-positive patients frequently manifest myelosuppression. In order to have a closer look at the impact of HIV-1 on T-lineage differentiation, this study utilized the OP9-DL1 coculture system, which supports in vitro T-lineage differentiation of human hematopoietic stem/progenitor cells. In the newly developed in vitro OP9-DL1/HIV-1 model, cord-derived CD34+ cells were infected with CXCR4-tropic HIV-1NL4−3 and cocultured. The HIV-infected cocultures exhibited reduced CD4+ T-cell growth at weeks 3–5 post infection compared to autologous uninfected cocultures. Further assays and analyses revealed that CD34+CD7+CXCR4+ cells can be quickly depleted as early as 1 week after infection of the subset, and this was accompanied by the emergence of rare CD34+CD7+CD4+ cells. A subsequent theoretical model analysis suggested potential influence of HIV-1 on the differentiation rate or death rate of lymphoid progenitor cells. These results indicate that CXCR4-tropic HIV-1 strains may impact the dynamics of CD34+CD7+ lymphoid progenitor cell pools, presumably leading to impaired T-cell production potential.
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Affiliation(s)
- Tetsuo Tsukamoto
- The Kirby Institute for Infection and Immunity in Society, University of New South Wales, Sydney, NSW, Australia.,Center for AIDS Research, Kumamoto University, Kumamoto, Japan.,Department of Immunology, Faculty of Medicine, Kindai University, Osaka, Japan
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5
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Zhang Y, Yang H, Li Q, Duan X, Zhao X, Wei Y, Chen X. Three-Dimensional Ameliorated Biologics Elicit Thymic Renewal in Tumor-Bearing Hosts. THE JOURNAL OF IMMUNOLOGY 2018; 201:1975-1983. [DOI: 10.4049/jimmunol.1701727] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Accepted: 07/23/2018] [Indexed: 12/31/2022]
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Weaver EA, Nehete PN, Nehete BP, Yang G, Buchl SJ, Hanley PW, Palmer D, Montefiori DC, Ferrari G, Ng P, Sastry KJ, Barry MA. Comparison of systemic and mucosal immunization with helper-dependent adenoviruses for vaccination against mucosal challenge with SHIV. PLoS One 2013; 8:e67574. [PMID: 23844034 PMCID: PMC3701068 DOI: 10.1371/journal.pone.0067574] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Accepted: 05/20/2013] [Indexed: 11/22/2022] Open
Abstract
Most HIV-1 infections are thought to occur at mucosal surfaces during sexual contact. It has been hypothesized that vaccines delivered at mucosal surfaces may mediate better protection against HIV-1 than vaccines that are delivered systemically. To test this, rhesus macaques were vaccinated by intramuscular (i.m.) or intravaginal (ivag.) routes with helper-dependent adenoviral (HD-Ad) vectors expressing HIV-1 envelope. Macaques were first immunized intranasally with species C Ad serotype 5 (Ad5) prior to serotype-switching with species C HD-Ad6, Ad1, Ad5, and Ad2 vectors expressing env followed by rectal challenge with CCR5-tropic SHIV-SF162P3. Vaccination by the systemic route generated stronger systemic CD8 T cell responses in PBMC, but weaker mucosal responses. Conversely, mucosal immunization generated stronger CD4 T cell central memory (Tcm) responses in the colon. Intramuscular immunization generated higher levels of env-binding antibodies, but neither produced neutralizing or cytotoxic antibodies. After mucosal SHIV challenge, both groups controlled SHIV better than control animals. However, more animals in the ivag. group had lower viral set points than in in the i.m. group. These data suggest mucosal vaccination may have improve protection against sexually-transmitted HIV. These data also demonstrate that helper-dependent Ad vaccines can mediate robust vaccine responses in the face of prior immunity to Ad5 and during four rounds of adenovirus vaccination.
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Affiliation(s)
- Eric A. Weaver
- Department of Internal Medicine, Division of Infectious Diseases, Translational Immunovirology Program, Department of Immunology, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Pramod N. Nehete
- Department of Veterinary Sciences, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, United States of America
| | - Bharti P. Nehete
- Department of Veterinary Sciences, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, United States of America
| | - Guojun Yang
- Department of Immunology, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, United States of America
| | - Stephanie J. Buchl
- Department of Veterinary Sciences, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, United States of America
| | - Patrick W. Hanley
- Department of Veterinary Sciences, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, United States of America
| | - Donna Palmer
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, United States of America
| | - David C. Montefiori
- Duke University Medical Center, Department of Surgery, Durham, North Carolina, United States of America
| | - Guido Ferrari
- Duke University Medical Center, Department of Surgery, Durham, North Carolina, United States of America
| | - Philip Ng
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, United States of America
| | - K. Jagannadha Sastry
- Department of Veterinary Sciences, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, United States of America
- Department of Immunology, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, United States of America
| | - Michael A. Barry
- Department of Internal Medicine, Division of Infectious Diseases, Translational Immunovirology Program, Department of Immunology, Mayo Clinic, Rochester, Minnesota, United States of America
- Department of Molecular Medicine, Mayo Clinic, Rochester, Minnesota, United States of America
- * E-mail:
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Abstract
SIV or SHIV infection of nonhuman primates (NHP) has been used to investigate the impact of coreceptor usage on the composition and dynamics of the CD4+ T cell compartment, mechanisms of disease induction and development of clinical syndrome. As the entire course of infection can be followed, with frequent access to tissue compartments, infection of rhesus macaques with CCR5-tropic SHIVs further allows for study of HIV-1 coreceptor switch after intravenous and mucosal inoculation, with longitudinal and systemic analysis to determine the timing, anatomical sites and cause for the change in envelope glycoprotein and coreceptor preference. Here, we review our current understanding of coreceptor use in NHPs and their impact on the pathobiological characteristics of the infection, and discuss recent advances in NHP studies to uncover the underlying selective pressures for the change in coreceptor preference in vivo.
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Affiliation(s)
- Silvana Tasca Sina
- Aaron Diamond AIDS Research Center, 455 First Ave, 7th Floor, New York, New York, USA
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Chrobak P, Simard MC, Bouchard N, Ndolo TM, Guertin J, Hanna Z, Dave V, Jolicoeur P. HIV-1 Nef Disrupts Maturation of CD4+T Cells through CD4/Lck Modulation. THE JOURNAL OF IMMUNOLOGY 2010; 185:3948-59. [DOI: 10.4049/jimmunol.1001064] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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9
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Different tempo and anatomic location of dual-tropic and X4 virus emergence in a model of R5 simian-human immunodeficiency virus infection. J Virol 2010; 84:340-51. [PMID: 19846515 DOI: 10.1128/jvi.01865-09] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We previously reported coreceptor switch in rhesus macaques inoculated intravenously with R5 simian-human immunodeficiency virus SF162P3N (SHIV(SF162P3N)). Whether R5-to-X4 virus evolution occurs in mucosally infected animals and in which anatomic site the switch occurs, however, were not addressed. We herein report a change in coreceptor preference in macaques infected intrarectally with SHIV(SF162P3N). The switch occurred in infected animals with high levels of virus replication and undetectable antiviral antibody response and required sequence changes in the V3 loop of the gp120 envelope protein. X4 virus emergence was associated with an accelerated drop in peripheral CD4(+) T-cell count but followed rather than preceded the onset of CD4(+) T-cell loss. The conditions, genotypic requirements, and patterns of coreceptor switch in intrarectally infected animals were thus remarkably consistent with those found in macaques infected intravenously. They also overlapped with those reported for humans, suggestive of a common mechanism for coreceptor switch in the two hosts. Furthermore, two independent R5-to-X4 evolutionary pathways were identified in one infected animal, giving rise to dual-tropic and X4 viruses which differed in switch kinetics and tissue localization. The dual-tropic switch event predominated early, and the virus established infection in multiple tissues sites. In contrast, the switch to X4 virus occurred later, initiating and expanding mainly in peripheral lymph nodes. These findings help define R5 SHIV(SF162P3N) infection of rhesus macaques as a model to study the mechanistic basis, dynamics, and sites of HIV-1 coreceptor switch.
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10
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Selective expression of human immunodeficiency virus Nef in specific immune cell populations of transgenic mice is associated with distinct AIDS-like phenotypes. J Virol 2009; 83:9743-58. [PMID: 19605470 DOI: 10.1128/jvi.00125-09] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We previously reported that CD4C/human immunodeficiency virus (HIV)(Nef) transgenic (Tg) mice, expressing Nef in CD4(+) T cells and cells of the macrophage/dendritic cell (DC) lineage, develop a severe AIDS-like disease, characterized by depletion of CD4(+) T cells, as well as lung, heart, and kidney diseases. In order to determine the contribution of distinct populations of hematopoietic cells to the development of this AIDS-like disease, five additional Tg strains expressing Nef through restricted cell-specific regulatory elements were generated. These Tg strains express Nef in CD4(+) T cells, DCs, and macrophages (CD4E/HIV(Nef)); in CD4(+) T cells and DCs (mCD4/HIV(Nef) and CD4F/HIV(Nef)); in macrophages and DCs (CD68/HIV(Nef)); or mainly in DCs (CD11c/HIV(Nef)). None of these Tg strains developed significant lung and kidney diseases, suggesting the existence of as-yet-unidentified Nef-expressing cell subset(s) that are responsible for inducing organ disease in CD4C/HIV(Nef) Tg mice. Mice from all five strains developed persistent oral carriage of Candida albicans, suggesting an impaired immune function. Only strains expressing Nef in CD4(+) T cells showed CD4(+) T-cell depletion, activation, and apoptosis. These results demonstrate that expression of Nef in CD4(+) T cells is the primary determinant of their depletion. Therefore, the pattern of Nef expression in specific cell population(s) largely determines the nature of the resulting pathological changes.
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11
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Delobel P, Nugeyre MT, Cazabat M, Sandres-Sauné K, Pasquier C, Cuzin L, Marchou B, Massip P, Cheynier R, Barré-Sinoussi F, Izopet J, Israël N. Naive T-cell depletion related to infection by X4 human immunodeficiency virus type 1 in poor immunological responders to highly active antiretroviral therapy. J Virol 2006; 80:10229-36. [PMID: 17005700 PMCID: PMC1617280 DOI: 10.1128/jvi.00965-06] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
The reasons for poor CD4+ T-cell recovery in some human immunodeficiency virus (HIV)-infected subjects despite effective highly active antiretroviral therapy (HAART) remain unclear. We recently reported that CXCR4-using (X4) HIV-1 could be gradually selected in cellular reservoirs during sustained HAART. Because of the differential expression of HIV-1 coreceptors CCR5 and CXCR4 on distinct T-cell subsets, the residual replication of R5 and X4 viruses could have different impacts on T-cell homeostasis during immune reconstitution on HAART. We examined this hypothesis and the mechanisms of CD4+ T-cell restoration by comparing the virological and immunological features of 15 poor and 15 good immunological responders to HAART. We found a high frequency of X4 viruses in the poor immunological responders. But the levels of intrathymic proliferation of the two groups were similar regardless of whether they were infected by R5 or X4 virus. The frequency of recent thymic emigrants in the poor immunological responders was also similar to that found in the good immunological responders, despite their reduced numbers of naïve CD4+ T cells. Our data, rather, suggest that the naïve T-cell compartment is drained by a high rate of mature naïve cell loss in the periphery due to bystander apoptosis or activation-induced differentiation. X4 viruses could play a role in the depletion of naïve T cells in poor immunological responders to HAART by triggering persistent T-cell activation and bystander apoptosis via gp120-CXCR4 interactions.
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Affiliation(s)
- Pierre Delobel
- Laboratoire de Virologie EA2046-IFR30, Centre Hospitalier Universitaire, TSA 40031, 31059 Toulouse cedex 9, France
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Gurney KB, Uittenbogaart CH. Human immunodeficiency virus persistence and production in T-cell development. CLINICAL AND VACCINE IMMUNOLOGY : CVI 2006; 13:1237-45. [PMID: 16988009 PMCID: PMC1656539 DOI: 10.1128/cvi.00184-06] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Human immunodeficiency virus type 1 (HIV-1) replication depends on CD4 and coreceptor expression as well as host factors associated with the activation state of the cell. To determine the impact of the activation stage of thymocytes on the HIV-1 life cycle, we investigated R5 and X4 HIV-1 entry, reverse transcription, and expression in discrete thymocyte subsets at different stages of T-cell development. Early after infection, preferential entry and replication of R5 HIV-1 were predominantly detected in mature CD3(+/hi) CD27(+) thymocytes. Thus, R5 HIV-1 targets the stage of development where thymocytes acquire functional responsiveness, which has important implications for HIV pathogenesis. In contrast, X4 HIV-1 expression and replication were primarily found in immature CD3(-/+/low) CD27(-) CD69(-) thymocytes. HIV-1 proviral burden and virus expression in thymocyte subsets correlated with the expression of the highest levels of the respective coreceptor. R5 and X4 HIV-1 entered and completed reverse transcription in all subsets tested, indicating that the activation state of thymocytes and coreceptor expression are sufficient to support full reverse transcription throughout development. Although R5 HIV-1 is expressed mainly in mature CD3(+/hi) CD27(+) thymocytes, 5.3% of HIV-1-infected immature thymocytes express R5 HIV-1, indicating that potentially latent viral DNA can be established early in T-cell development.
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Affiliation(s)
- Kevin B Gurney
- Department of Microbiology, Immunology, and Molecular Genetics, UCLA School of Medicine, Los Angeles, CA 90095-1747, USA
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Corrigan GE, Hansson EO, Mörner A, Berry N, Källander CFR, Thorstensson R. Reverse transcriptase viral load correlates with RNA in SIV/SHIV-infected macaques. AIDS Res Hum Retroviruses 2006; 22:917-23. [PMID: 16989619 DOI: 10.1089/aid.2006.22.917] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Monitoring of viral load in macaques has usually been carried out using in-house PCR-based methods. A novel viral load (VL) kit (ExaVir Load) based on the measurement of lentivirus reverse transcriptase (RT) activity provides a potential alternative to methods that measure plasma viral RNA. RT is a fundamental and conserved activity of all retroviruses and the method should theoretically detect RT from all lentiviruses. To test this we compared VL measured by a commercially available RT kit with an in-house QC RT-PCR in macaques infected with SIV and SHIV. Both RT and RNA levels were measured over time in both sets of macaques. Results indicated that the relationship between both tests was strong for SIV and SHIV (r = 0.95 and r = 0.92, p < 0.0001, respectively). The VL trends also followed each other, indicating that both techniques measured the same process of viral replication. Furthermore, the RT load obtained using standardized control plasma samples supplied by NIBSC gave values close to the designated VL. However, when comparing RT load with QC RT-PCR a consistently three to five time higher level was obtained with the RT assay, highlighting potential differences in assay calibration. Even so, the data suggest that the RT assay is both sensitive and robust for use in the SIV/SHIV macaque model, particularly where molecular-based assays for SIV VL determinations are not easily available. The assay is also a commercially available kit and hence has the potential to reduce the variability seen between laboratories using in-house PCR.
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Affiliation(s)
- Gary E Corrigan
- Swedish Institute for Infectious Disease Control, Solna, Sweden., Microbiology Tumorbiology Center, Karolinska Institute, Stockholm, Sweden
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Miyake A, Ibuki K, Enose Y, Suzuki H, Horiuchi R, Motohara M, Saito N, Nakasone T, Honda M, Watanabe T, Miura T, Hayami M. Rapid dissemination of a pathogenic simian/human immunodeficiency virus to systemic organs and active replication in lymphoid tissues following intrarectal infection. J Gen Virol 2006; 87:1311-1320. [PMID: 16603534 DOI: 10.1099/vir.0.81307-0] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A better understanding of virological events during the early phase of human immunodeficiency virus 1 (HIV-1) infection is important for development of effective antiviral vaccines. In this study, by using quantitative PCR and an infectious plaque assay, virus distribution and replication were examined in various internal organs of rhesus macaques for almost 1 month after intrarectal inoculation of a pathogenic simian immunodeficiency virus/HIV chimeric virus (SHIV-C2/1-KS661c). At 3 days post-inoculation (p.i.), proviral DNA was detected in the rectum, thymus and axillary lymph node. In lymphoid tissues, infectious virus was first detected at 6 days p.i. and a high level of proviral DNA and infectious virus were both detected at 13 days p.i. By 27 days p.i., levels of infectious virus decreased dramatically, although proviral DNA load remained unaltered. In the intestinal tract, levels of infectious virus detected were much lower than in lymphoid tissues, whereas proviral DNA was detected at the same level as in lymphoid tissues throughout the infection. In the thymus and jejunum, CD4CD8 double-positive T cells were depleted earlier than CD4 single-positive cells. These results show that the virus spread quickly to systemic tissues after mucosal transmission. Thereafter, infectious virus was actively produced in the lymphoid tissues, but levels decreased significantly after the peak of viraemia. In contrast, in the intestinal tract, infectious virus was produced at low levels from the beginning of infection. Moreover, virus pathogenesis differed in CD4 single-positive and CD4CD8 double-positive T cells.
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Affiliation(s)
- Ariko Miyake
- Laboratory of Tumor Cell Biology, Department of Medical Genome Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Tokyo 108-8639, Japan
- Institute for Virus Research, Laboratory of Primate Model, Experimental Research Center for Infectious Disease, Kyoto University, Sakyo-ku, Kyoto 606-8507, Japan
| | - Kentaro Ibuki
- Institute for Virus Research, Laboratory of Primate Model, Experimental Research Center for Infectious Disease, Kyoto University, Sakyo-ku, Kyoto 606-8507, Japan
| | - Yoshimi Enose
- Institute for Virus Research, Laboratory of Primate Model, Experimental Research Center for Infectious Disease, Kyoto University, Sakyo-ku, Kyoto 606-8507, Japan
| | - Hajime Suzuki
- Institute for Virus Research, Laboratory of Primate Model, Experimental Research Center for Infectious Disease, Kyoto University, Sakyo-ku, Kyoto 606-8507, Japan
| | - Reii Horiuchi
- Institute for Virus Research, Laboratory of Primate Model, Experimental Research Center for Infectious Disease, Kyoto University, Sakyo-ku, Kyoto 606-8507, Japan
| | - Makiko Motohara
- Institute for Virus Research, Laboratory of Primate Model, Experimental Research Center for Infectious Disease, Kyoto University, Sakyo-ku, Kyoto 606-8507, Japan
| | - Naoki Saito
- Institute for Virus Research, Laboratory of Primate Model, Experimental Research Center for Infectious Disease, Kyoto University, Sakyo-ku, Kyoto 606-8507, Japan
| | | | - Mitsuo Honda
- National Institute of Infectious Disease, Tokyo 162-8640, Japan
| | - Toshiki Watanabe
- Laboratory of Tumor Cell Biology, Department of Medical Genome Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Tokyo 108-8639, Japan
| | - Tomoyuki Miura
- Institute for Virus Research, Laboratory of Primate Model, Experimental Research Center for Infectious Disease, Kyoto University, Sakyo-ku, Kyoto 606-8507, Japan
| | - Masanori Hayami
- Institute for Virus Research, Laboratory of Primate Model, Experimental Research Center for Infectious Disease, Kyoto University, Sakyo-ku, Kyoto 606-8507, Japan
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15
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Motohara M, Ibuki K, Miyake A, Fukazawa Y, Inaba K, Suzuki H, Masuda K, Minato N, Kawamoto H, Nakasone T, Honda M, Hayami M, Miura T. Impaired T-cell differentiation in the thymus at the early stages of acute pathogenic chimeric simian-human immunodeficiency virus (SHIV) infection in contrast to less pathogenic SHIV infection. Microbes Infect 2006; 8:1539-49. [PMID: 16702011 DOI: 10.1016/j.micinf.2006.01.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2005] [Revised: 01/12/2006] [Accepted: 01/16/2006] [Indexed: 10/24/2022]
Abstract
One of the mechanisms by which HIV infection induces the depletion of CD4+ T cells has been suggested to be impairment of T-cell development in the thymus, although there is no direct evidence that this occurs. To examine this possibility, we compared T-cell maturation in the intrathymic progenitors between macaques infected with an acute pathogenic chimeric simian-human immunodeficiency virus (SHIV), which causes profound and irreversible CD4+ T-cell depletion, and macaques infected with a less pathogenic SHIV, which causes only a transient CD4+ T-cell decline. Within 27 days post-inoculation (dpi), the two virus infections caused similar increases in plasma viral loads and similar decreases in CD4+ T-cell counts. However, in the thymus, the acute pathogenic SHIV resulted in increased thymic involution, atrophy and the depletion of immature T cells including CD4(+)CD8(+) double-positive (DP) cells, whereas the less pathogenic SHIV did not have these effects. Ex vivo differentiation of CD3(-)CD4(-)CD8(-) triple-negative (TN) intrathymic progenitors to DP cells was assessed by a monkey-mouse xenogenic fetal thymus organ culture system. Differentiation was impaired in the TN intrathymic progenitors of the acute pathogenic SHIV-infected monkeys, while differentiation was not impaired in the TN intrathymic progenitors of the less pathogenic SHIV-infected monkeys. These differences suggest that dysfunction of thymic maturation makes an important contribution to the irreversible depletion of circulating CD4+ T cells in vivo.
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Affiliation(s)
- Makiko Motohara
- Laboratory of Primate Model, Experimental Research Center for Infectious Diseases, Institute for Virus Research, Kyoto University, 53 Shogoinkawara-Machi, Sakyo-Ku, Kyoto 606-8507, Japan
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16
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17
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Misumi S, Nakayama D, Kusaba M, Iiboshi T, Mukai R, Tachibana K, Nakasone T, Umeda M, Shibata H, Endo M, Takamune N, Shoji S. Effects of immunization with CCR5-based cycloimmunogen on simian/HIVSF162P3 challenge. THE JOURNAL OF IMMUNOLOGY 2006; 176:463-71. [PMID: 16365439 DOI: 10.4049/jimmunol.176.1.463] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
A synthetic cycloimmunogen targeting the HIV-1 coreceptor CCR5 was evaluated for its capacity to induce CCR5-specific Abs with anti-HIV-1 activity in cynomolgus macaques. The cyclic closed-chain dodecapeptide (cDDR5) mimicking the conformation-specific domain of human CCR5 was chemically prepared, in which the Gly-Glu dipeptide links the amino and carboxy termini of the decapeptidyl linear chain (Arg168 to Thr177) derived from the undecapeptidyl arch (Arg168 to Cys178) of extracellular loop-2 in CCR5. The immunization of cynomolgus macaques with the cDDR5-conjugated multiple-Ag peptide (cDDR5-MAP) induced anti-cDDR5 serum production for approximately 15 wk after the third immunization. The antisera raised against cDDR5-MAP reacted with both human and macaque CCR5s, and potently suppressed infection by the R5 HIV-1 laboratory isolate (HIV JRFL), R5 HIV-1 primary isolates (clade A:HIV 93RW004 and clade C:HIV MJ4), and a pathogenic simian/HIV (SHIV SF162P3) bulk isolate in vitro. To examine the prophylactic efficacy of anti-CCR5 serum Ab for acute HIV-1 infection, cynomolgus macaques were challenged with SHIV SF162P3. The cDDR5-MAP immunization attenuated the acute phase of SHIV SF162P3 replication. The geometric mean plasma viral load in the vaccinated macaques was 217.10 times lower than that of the control macaques at 1 wk postchallenge. Taken together, these results suggest that cDDR5-MAP immunization is an effective prophylactic vaccine strategy that suppresses and delays viral propagation during the initial HIV-1 transmission for the containment of HIV-1 replication subsequent to infection.
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Affiliation(s)
- Shogo Misumi
- Department of Pharmaceutical Biochemistry, Faculty of Medical and Pharmaceutical Sciences, Kumamoto University, Kumamoto, Japan
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18
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Suzuki H, Motohara M, Miyake A, Ibuki K, Fukazawa Y, Inaba K, Masuda K, Minato N, Kawamoto H, Hayami M, Miura T. Intrathymic effect of acute pathogenic SHIV infection on T-lineage cells in newborn macaques. Microbiol Immunol 2005; 49:667-79. [PMID: 16034211 DOI: 10.1111/j.1348-0421.2005.tb03646.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We intrarectally infected newborn macaques with a pathogenic simian/human immunodeficiency virus (SHIV) that induced rapid and profound CD4 (+) T cell depletion, and examined the early effects of this SHIV on the thymus. After intrarectal infection, viral loads were much higher in the thymus than in other lymphoid tissues in newborns. In contrast, no clear difference was seen in the viral loads of different tissues in adults. Histological and immunohistochemical observations showed severe thymic involution. Depletion of CD4 (+) thymocytes began in the medulla at 2 weeks post infection and spread over the whole thymus. After in vivo infection, the CD2 (+) subpopulation, which represents a relatively later stage of T cell progenitors, was selectively reduced and development of thymocytes from CD3 (-) CD4 (-) CD8 (-) cells to CD4 (+) CD8 (+) cells was impaired. These results suggest that profound and irreversible loss of CD4 (+) cells that are observed in the peripheral blood of SHIV-infected monkeys are due to destruction of the thymus and impaired thymopoiesis as a result of SHIV infection in the thymus.
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Affiliation(s)
- Hajime Suzuki
- Laboratory of Primate Model, Institute for Virus Research, Kyoto University, Japan
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19
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Abstract
Current models hold that CD4+ depletion occurs as a result of direct and indirect effects of HIV, which both kill peripheral CD4+ cells and prevent adequate regeneration. Although age-associated involution diminishes thymic reserve and HIV is clearly thymotoxic, clinical trials have nonetheless shown that large proportions of patients who sustain adequate control of viral replication with highly active antiretroviral therapy (HAART) will demonstrate some evidence for thymic-dependent immune reconstitution, which is associated with improved immune competence. Furthermore, patients with insufficient or absent immune reconstitution following HAART generally lack evidence for thymopoiesis. Current studies are focused on improving our understanding of the causes for thymic failure in HIV infection. Recent work has demonstrated that some HIV strains, especially those that are CXCR4 trophic, are more thymotoxic and may contribute to irreversible thymic damage in this population.
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Affiliation(s)
- Rohan Hazra
- Pediatric Oncology Branch, National Cancer Institute, Bldg. 10-CRC Rm. 1W-3940, 10 Center Drive, MSC 1104, Bethesda, MD 20892, USA
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20
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Sempowski GD, Hicks CB, Eron JJ, Bartlett JA, Hale LP, Ferrari G, Edwards LJ, Fiscus S, Haynes BF. Naïve T Cells Are Maintained in the Periphery During the First3 Months of Acute HIV-1 Infection: Implications for Analysis of Thymus Function. J Clin Immunol 2005; 25:462-72. [PMID: 16160915 DOI: 10.1007/s10875-005-5635-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2005] [Accepted: 05/02/2005] [Indexed: 11/25/2022]
Abstract
A key determinant of T cell dynamics in HIV-1 infection is the status of thymic function. To date, most studies of the impact of HIV-1 on the thymus during early HIV-1 infection have been done in samples collected in the interval of 3-12 months after infection. In this study, we have probed the status of thymic function and peripheral naive T cells in patients with acute HIV-1 infection diagnosed 18-72 days after the onset of symptoms. We found that peripheral CD4 and CD8 T cell proliferation was initially elevated, then waned over time. The fall in T cell proliferation correlated with a reduction in HIV-1 viral RNA levels and a rise in peripheral blood CD4+ CD25+ T cells. In spite of elevated T cell proliferation early on in primary HIV-1 infection, levels of naive phenotype CD4 and CD8 T cells and T cell receptor excision circle positive cells (sjTREC(+)) remained constant. Taken together with the observation that T cell proliferation normally dilutes peripheral T cell episomal sjTREC levels, these data suggested that thymopoiesis contributes to maintenance of the naive T cell pool during the earliest stages of HIV-1 infection (18-72 days).
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Affiliation(s)
- Gregory D Sempowski
- Department of Medicine, Duke University Medical Center, Durham, North Carolina 27710, USA.
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Meissner EG, Duus KM, Gao F, Yu XF, Su L. Characterization of a thymus-tropic HIV-1 isolate from a rapid progressor: role of the envelope. Virology 2004; 328:74-88. [PMID: 15380360 PMCID: PMC4429060 DOI: 10.1016/j.virol.2004.07.019] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2004] [Revised: 05/28/2004] [Accepted: 07/16/2004] [Indexed: 02/04/2023]
Abstract
Loss of T cell homeostasis usually precedes the onset of AIDS. We hypothesized that rapid progressors may be transmitted with HIV-1 that is particularly able to perturb T cell homeostasis. To this end, we have tested two transmitted, syncytium-inducing (SI) viral isolates from a rapid progressor in two thymus models. One of the isolates (R3A) exhibited markedly rapid kinetics of replication and thymocyte depletion. These phenotypes mapped to the envelope, as a recombinant NL4-3 virus encoding the R3A envelope had similar phenotypes, even in the absence of nef. Notably, the viruses with high pathogenic activity in the thymus (R3A and NL4-R3A) did not show enhanced replication or cytopathicity in PHA-stimulated PBMCs. Furthermore, NL4-R3A did not enhance replication of the coinfected NL4-3 virus in the thymus, suggesting an intrinsic advantage of the R3A envelope. The R3A envelope showed higher entry activity in infecting human T cells and in depleting CD4+ thymocytes when expressed in trans. These data suggest that SI viruses with unique envelope functions which can overcome barriers to transmission may hasten disease progression by perturbing T cell homeostasis.
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Affiliation(s)
- Eric G. Meissner
- Department of Microbiology and Immunology, University of North Carolina, Chapel Hill, NC 27599, United States
- The Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC 27599, United States
| | - Karen M. Duus
- Department of Microbiology and Immunology, University of North Carolina, Chapel Hill, NC 27599, United States
- The Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC 27599, United States
| | - Feng Gao
- Department of Medicine, Duke University Medical Center, Duke University, Durham, NC 27710, United States
| | - Xiao-Fang Yu
- Department of Molecular Microbiology and Immunology, Johns Hopkins University, Bloomberg School of Public Health, Baltimore, MD 21205, United States
| | - Lishan Su
- Department of Microbiology and Immunology, University of North Carolina, Chapel Hill, NC 27599, United States
- The Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC 27599, United States
- Corresponding author. Fax: +1 919 966 8212. (L. Su)
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