The ability of HIV-1 to establish an infection and replicate to high copy number in CD4 lymphocytes is dependent on both the activation state of the cell and virus-encoded regulatory proteins that modulate viral gene expression. To study these required virus-cell interactions, we have used an in vitro cell model of acute HIV infection of quiescent, primary CD4 lymphocytes and subsequent induction of T cell activation and virus replication by lectin or CD3 receptor cross-linking. Experiments were done to determine if the capacity of HIV to establish infection and complete replication was impacted by the maturational state of the CD4 cell target or the specific signal induction pathway engaged during activation. Primary CD4 cells were FACS-sorted into the major phenotypic subsets representative of memory (CD45RO) and naive (CD45RA) cells. Levels of virus replication were compared between infection with wild-type NL4-3 virus and an isogenic mutant containing a deletion in nef regulatory gene. PHA mitogen stimulation was compared with anti-CD3, with and without anti-CD28 costimulation, for induction of cell proliferation and virus replication. In both infected and uninfected cells, the RA cell subset exhibited significantly greater response to CD3/CD28 stimulation than did the RO cell subset. In contrast, the majority of virus replication occurred consistently in the RO cell subset. Deletion of HIV nef function caused a severe reduction in viral replication, especially in the RA naive cell subset after CD3 induction. PCR analysis of viral DNA formation, during infection of quiescent cells, demonstrated that the observed differences in HIV replication capacity between RO and RA cell subsets were not due to inherent differences in cell susceptibility to infection. Our results indicate that HIV replication is enhanced selectively in CD45RO memory phenotype cells through the probable contribution of specialized cellular factors which are produced during CD3-initiated signal transduction.
C A Spina, H E Prince, D D Richman
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Proceedings of the National Academy of Sciences | 2004 |
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2004 | |
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Characterizing Immune Reconstitution after Long-Term Highly Active Antiretroviral Therapy in Pediatric AIDS
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Clinical microbiology reviews | 2001 |
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Proceedings of the National Academy of Sciences | 2001 |
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Immunity | 2001 |
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Journal of Adolescent Health | 2001 |
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Virus Research | 2001 |
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Infection of the CD45RA + (Naive) Subset of Peripheral CD8 + Lymphocytes by Human Immunodeficiency Virus Type 1 In Vivo
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Immunologic Research | 2001 |
Differential coreceptor expression allows for independent evolution of non–syncytium-inducing and syncytium-inducing HIV-1
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Journal of Clinical Investigation | 2000 |
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Journal of Dermatological Science | 2000 |
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Biomedecine & Pharmacotherapy | 2000 |
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Nature Medicine | 2000 |
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Enhanced levels of functional HIV-1 co-receptors on human mucosal T cells demonstrated using intestinal biopsy tissue:
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Primary HIV-1 infection of human CD4+ T cells passaged into SCID mice leads to selection of chronically infected cells through a massive Fas-mediated autocrine suicide of uninfected cells
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Linkage of the CCR5Δ32 Mutation with a Functional Polymorphism of CD45RA
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Journal of immunology (Baltimore, Md. : 1950) | 2000 |
Highly efficient gene transfer in naive human T cells with a murine leukemia virus-based vector
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Infection of CD4 + Memory T Cells by HIV-1 Requires Expression of Phosphodiesterase 4
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Journal of immunology (Baltimore, Md. : 1950) | 2000 |
Dynamics of CCR5 Expression by CD4 + T Cells in Lymphoid Tissues during Simian Immunodeficiency Virus Infection
RS Veazey, KG Mansfield, IC Tham, AC Carville, DE Shvetz, AE Forand, AA Lackner |
Journal of virology | 2000 |
Identifying the Target Cell in Primary Simian Immunodeficiency Virus (SIV) Infection: Highly Activated Memory CD4 + T Cells Are Rapidly Eliminated in Early SIV Infection In Vivo
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Journal of virology | 2000 |
Inhibition of CD3/CD28-Mediated Activation of the MEK/ERK Signaling Pathway Represses Replication of X4 but Not R5 Human Immunodeficiency Virus Type 1 in Peripheral Blood CD4 + T Lymphocytes
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Journal of virology | 2000 |
Effect of Long-Term Infection with nef-Defective Attenuated HIV Type 1 on CD4+ and CD8+ T Lymphocytes: Increased CD45RO+ CD4+ T Lymphocytes and Limited Activation of CD8+ T Lymphocytes
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AIDS Research and Human Retroviruses | 1999 |
Dynamics of Provirus Load and Lymphocyte Subsets after Interleukin 2 Treatment in HIV-Infected Patients
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AIDS Research and Human Retroviruses | 1999 |
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Clinical & Experimental Immunology | 1999 |
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Journal of virology | 1999 |
Human immunodeficiency virus type 1 strains R5 and X4 induce different pathogenic effects in hu-PBL-SCID mice, depending on the state of activation/differentiation of human target cells at the time of primary infection
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Journal of virology | 1999 |
Quantification of CD4, CCR5, and CXCR4 levels on lymphocyte subsets, dendritic cells, and differentially conditioned monocyte-derived macrophages
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Proceedings of the National Academy of Sciences | 1999 |
Viral dynamics of acute HIV-1 infection
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Journal of Experimental Medicine | 1999 |
Current concepts in human immunodeficiency virus infection and AIDS
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Clinical and diagnostic laboratory immunology | 1999 |
Altered Expression of CD4, CD54, CD62L, and CCR5 in Primary Lymphocytes Productively Infected with the Human Immunodeficiency Virus
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AIDS Research and Human Retroviruses | 1999 |
Viral Dynamics of Acute HIV-1 Infection
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Deficient Cellular Immunity--Finding and Fixing the Defects
PD Greenberg, SR Riddell |
Science | 1999 |
Consistent Viral Evolutionary Changes Associated with the Progression of Human Immunodeficiency Virus Type 1 Infection
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Journal of virology | 1999 |
Both Memory and CD45RA + /CD62L + Naive CD4 + T Cells Are Infected in Human Immunodeficiency Virus Type 1-Infected Individuals
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Journal of virology | 1999 |
Highly active antiretroviral therapy during early HIV infection reverses T-cell activation and maturation abnormalities
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AIDS | 1998 |
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Nature Medicine | 1998 |
Diverse host responses and outcomes following simian immunodeficiency virus SIVmac239 infection in sooty mangabeys and rhesus macaques
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Multiple modes of cellular activation and virus transmission in HIV infection: a role for chronically and latently infected cells in sustaining viral replication
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Proceedings of the National Academy of Sciences | 1998 |
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Journal of Experimental Medicine | 1998 |
Productive Infection of Neonatal CD8+ T Lymphocytes by HIV-1
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Journal of Experimental Medicine | 1998 |
Multiple modes of cellular activation and virus transmission in HIV infection: A role for chronically and latently infected cells in sustaining viral replication
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Proceedings of the National Academy of Sciences | 1998 |
Human Lymphoblastoid CD4+ T Cells Become Permissive to Macrophage-Tropic Strains of Human Immunodeficiency Virus Type 1 after Passage into Severe Combined Immunodeficient Mice through In Vivo Upregulation of CCR5: In Vivo Dynamics of CD4+ T-Cell Differentiation in Pathogenesis of AIDS
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Journal of virology | 1998 |
Naı̈ve and Memory CD4 T Cells Differ in Their Susceptibilities to Human Immunodeficiency Virus Type 1 Infection following CD28 Costimulation: Implications for Transmission and Pathogenesis
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Journal of virology | 1998 |
Progression to the G 1 b Phase of the Cell Cycle Is Required for Completion of Human Immunodeficiency Virus Type 1 Reverse Transcription in T Cells
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Journal of virology | 1998 |
Recovery of Replication-Competent HIV Despite Prolonged Suppression of Plasma Viremia
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