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Bellinger DL, Lorton D. Sympathetic Nerves and Innate Immune System in the Spleen: Implications of Impairment in HIV-1 and Relevant Models. Cells 2022; 11:cells11040673. [PMID: 35203323 PMCID: PMC8870141 DOI: 10.3390/cells11040673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 01/26/2022] [Accepted: 02/08/2022] [Indexed: 11/26/2022] Open
Abstract
The immune and sympathetic nervous systems are major targets of human, murine and simian immunodeficiency viruses (HIV-1, MAIDS, and SIV, respectively). The spleen is a major reservoir for these retroviruses, providing a sanctuary for persistent infection of myeloid cells in the white and red pulps. This is despite the fact that circulating HIV-1 levels remain undetectable in infected patients receiving combined antiretroviral therapy. These viruses sequester in immune organs, preventing effective cures. The spleen remains understudied in its role in HIV-1 pathogenesis, despite it hosting a quarter of the body’s lymphocytes and diverse macrophage populations targeted by HIV-1. HIV-1 infection reduces the white pulp, and induces perivascular hyalinization, vascular dysfunction, tissue infarction, and chronic inflammation characterized by activated epithelial-like macrophages. LP-BM5, the retrovirus that induces MAIDS, is a well-established model of AIDS. Immune pathology in MAIDs is similar to SIV and HIV-1 infection. As in SIV and HIV, MAIDS markedly changes splenic architecture, and causes sympathetic dysfunction, contributing to inflammation and immune dysfunction. In MAIDs, SIV, and HIV, the viruses commandeer splenic macrophages for their replication, and shift macrophages to an M2 phenotype. Additionally, in plasmacytoid dendritic cells, HIV-1 blocks sympathetic augmentation of interferon-β (IFN-β) transcription, which promotes viral replication. Here, we review viral–sympathetic interactions in innate immunity and pathophysiology in the spleen in HIV-1 and relevant models. The situation remains that research in this area is still sparse and original hypotheses proposed largely remain unanswered.
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Chereshnev VA, Bocharov G, Bazhan S, Bachmetyev B, Gainova I, Likhoshvai V, Argilaguet JM, Martinez JP, Rump JA, Mothe B, Brander C, Meyerhans A. Pathogenesis and treatment of HIV infection: the cellular, the immune system and the neuroendocrine systems perspective. Int Rev Immunol 2013; 32:282-306. [PMID: 23617796 DOI: 10.3109/08830185.2013.779375] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Infections with HIV represent a great challenge for the development of strategies for an effective cure. The spectrum of diseases associated with HIV ranges from opportunistic infections and cancers to systemic physiological disorders like encephalopathy and neurocognitive impairment. A major progress in controlling HIV infection has been achieved by highly active antiretroviral therapy (HAART). However, HAART does neither eliminate the virus reservoirs in form of latently infected cells nor does it completely reconstitute immune reactivity and physiological status. Furthermore, the failure of the STEP vaccine trial and the only marginal efficacies of the RV144 trial together suggest that the causal relationships between the complex sets of viral and immunological processes that contribute to protection or disease pathogenesis are still poorly understood. Here, we provide an up-to-date overview of HIV-host interactions at the cellular, the immune system and the neuroendocrine systems level. Only by integrating this multi-level knowledge one will be able to handle the systems complexity and develop new methodologies of analysis and prediction for a functional restoration of the immune system and the health of the infected host.
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Affiliation(s)
- V A Chereshnev
- Institute of Immunology and Physiology, Ural Branch RAS, Ekaterinburg, Russia.
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ISG15 modification of filamin B negatively regulates the type I interferon-induced JNK signalling pathway. EMBO Rep 2009; 10:374-80. [PMID: 19270716 DOI: 10.1038/embor.2009.23] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2008] [Revised: 01/03/2009] [Accepted: 01/22/2009] [Indexed: 12/23/2022] Open
Abstract
Interferon (IFN)-induced signalling pathways have essential functions in innate immune responses. In response to type I IFNs, filamin B tethers RAC1 and a Jun N-terminal kinase (JNK)-specific mitogen-activated protein kinase (MAPK) module--MEKK1, MKK4 and JNK--and thereby promotes the activation of JNK and JNK-mediated apoptosis. Here, we show that type I IFNs induce the conjugation of filamin B by interferon-stimulated gene 15 (ISG15). ISGylation of filamin B led to the release of RAC1, MEKK1 and MKK4 from the scaffold protein and thus to the prevention of sequential activation of the JNK cascade. By contrast, blockade of filamin B ISGylation by substitution of Lys 2467 with arginine or by knockdown of ubiquitin-activating enzyme E1-like (UBEL1) prevented the release of the signalling molecules from filamin B, resulting in persistent promotion of JNK activation and JNK-mediated apoptosis. These results indicate that filamin B ISGylation acts as a negative feedback regulatory gate for the desensitization of type I IFN-induced JNK signalling.
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Abstract
This review surveys empirical research pertinent to the hypothesis that activity of the hypothalamus-pituitary-adrenal (HPA) axis and/or the sympathetic nervous system (SNS) might mediate biobehavioral influences on HIV-1 pathogenesis and disease progression. Data are considered based on causal effects of neuroeffector molecules on HIV-1 replication, prospective relationships between neural/endocrine parameters and HIV-relevant biological or clinical markers, and correlational data consistent with in vivo neural/endocrine mediation in human or animal studies. Results show that HPA and SNS effector molecules can enhance HIV-1 replication in cellular models via effects on viral infectivity, viral gene expression, and the innate immune response to infection. Animal models and human clinical studies both provide evidence consistent with SNS regulation of viral replication, but data on HPA mediation are less clear. Regulation of leukocyte biology by neuroeffector molecules provides a plausible biological mechanism by which psychosocial factors might influence HIV-1 pathogenesis, even in the era of effective antiretroviral therapy. As such, neural and endocrine parameters might provide useful biomarkers for gauging the promise of behavioral interventions and suggest novel adjunctive strategies for controlling HIV-1 disease progression.
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Alexaki A, Quiterio SJ, Liu Y, Irish B, Kilareski E, Nonnemacher MR, Wigdahl B. PMA-induced differentiation of a bone marrow progenitor cell line activates HIV-1 LTR-driven transcription. DNA Cell Biol 2007; 26:387-94. [PMID: 17570762 DOI: 10.1089/dna.2006.0542] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Cells of the monocyte-macrophage lineage play an important role in human immunodeficiency virus type 1 (HIV-1)-associated disease. Infected myeloid precursor cells of the bone marrow are thought to be a viral reservoir that may repopulate the peripheral blood, central nervous system (CNS), and other organ systems throughout the course of disease. To model select aspects of HIV-1 infection of the bone marrow compartment in vitro, the erythro-myeloid precursor cell line, TF-1, was used. Phorbol 12-myristate 13-acetate (PMA) was found to induce the TF-1 cell line to differentiate through the myeloid lineage and become activated, as demonstrated by cellular morphologic changes and surface expression of differentiation and activation markers. Herein we demonstrate that HIV-1 long terminal repeats (LTRs) from T-, M-, and dual-tropic molecular clones have similar basal LTR activity in TF-1 cells and that differentiation of these cells by PMA resulted in increased LTR activity. Examination of specific cis-acting elements involved in basal and PMA-induced LTR activity demonstrated that the transcription factor families nuclear factor-kappa B (NF-kappaB) and specificity protein (Sp) contributed to the LTR activity of TF-1 cells, the Sp family being the most critical. These studies elucidate the impact of infected bone marrow monocytic cell differentiation on LTR activity and its potential impact on HIV-1-associated disease.
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Affiliation(s)
- Aikaterini Alexaki
- Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, Pennsylvania 19129, USA
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Yang CH, Murti A, Pfeffer. LM. Interferon induces NF-kappa B-inducing kinase/tumor necrosis factor receptor-associated factor-dependent NF-kappa B activation to promote cell survival. J Biol Chem 2005; 280:31530-6. [PMID: 16009713 PMCID: PMC1215463 DOI: 10.1074/jbc.m503120200] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Type I interferons (IFNs) play critical roles in the host defense by modulating the expression of various genes via the IFN-dependent activation of signal transducers and activators of transcription and NF-kappaB (nuclear factor kappa B) transcription factors. Previous studies established that IFNalpha/beta activates NF-kappaB to promote cell survival through a phosphatidylinositol 3-kinase (PI3K)/Akt pathway, which involves serine phosphorylation and degradation of IkappaB alpha. We now describe a second pathway by which IFNs activate NF-kappaB that is independent of IkappaB degradation. This pathway involves NF-kappaB-inducing kinase (NIK) and the tumor necrosis factor receptor-associated factor-2 (TRAF2) and results in IFNalpha/beta-induced processing of the p100/NF-kappaB2 precursor into p52. IFNalpha/beta stimulates NF-kappaB DNA binding and NF-kappaB-dependent transcription. Whereas expression of NIK and TRAF2 constructs causes NF-kappaB activation, expression of dominant negative NIK and TRAF2 constructs blocks IFN-promoted NF-kappaB activation and IFN-stimulated kappaB-dependent transcription and IFNalpha/beta-induced processing of the p100/NF-kappaB2 precursor into p52. In contrast, PI3K does not mediate IFNalpha/beta-induced p100 processing, although PI3K is involved in the pathway resulting in IkappaB alpha degradation. Moreover, whereas IFN promotes cell survival in lymphoblastoid cells, expression of dominant negative NIK and TRAF2 constructs enhances IFN-induced apoptosis. Our results for the first time place NIK and TRAF2, previously shown to function in TNF signaling, within the IFN signal transduction pathway. Thus, IFN induces NF-kappaB activation to mediate IFN-dependent cell survival signals through a "canonical" pathway of IkappaB alpha proteolysis mediated by PI3K/Akt and a "noncanonical" pathway of p100 processing mediated by NIK/TRAF.
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Affiliation(s)
| | | | - Lawrence M. Pfeffer.
- Department of Pathology and Laboratory Medicine, University of Tennessee Health Science Center, And the University of Tennessee Cancer Institute, Memphis, TN 38163
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Quiterio S, Grant C, Hogan TH, Krebs FC, Wigdahl B. C/EBP- and Tat-mediated activation of the HIV-1 LTR in CD34+ hematopoietic progenitor cells. Biomed Pharmacother 2003; 57:49-56. [PMID: 12642037 DOI: 10.1016/s0753-3322(02)00332-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Abstract
Human immunodeficiency virus type 1 (HIV-1) infection of cells of the monocyte/macrophage lineage within the bone marrow and peripheral blood plays an important role in the pathologic events leading to the development of the acquired immune deficiency syndrome (AIDS) as well as HIV-1 dementia (HIVD). The TF-1 erythro-myeloid cell line is being utilized as a model cellular phenotype to examine HIV-1 infection of a hematopoietic progenitor cell population. Expression of TF-1 cell surface marker RNAs and proteins was characterized by RT-PCR and FACS, respectively, and compared to those of the well characterized U-937 monocytic cell line. Transcription factors in TF-1 and U-937 cells that have been shown to be important for sustaining the expression of HIV-1 LTR activity were also examined. TF-1 cells were shown to contain the transcription factors C/EBP, Sp1, and NF-kappaB. C/EBP- and Tat-mediated induction of the YU-2 LTR was examined. Relative C/EBP induction of the HIV-1 strain YU-2 LTR was greater in TF-1 cells than in U-937 cells. When the C/EBP sites I and II were mutated to sequences with a low relative affinity for C/EBP factors, there was a reduction of Tat-mediated trans-activation in TF-1 cells, but not in U-937 cells. These studies form the foundation for investigations into the relationship between HIV-1 infection of bone marrow and peripheral blood precursor cells of the monocyte/macrophage lineage and pathogenesis associated with HIV-1 infection of the immune and central nervous system (CNS).
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Affiliation(s)
- Shane Quiterio
- Department of Microbiology and Immunology, The Pennsylvania State University, College of Medicine, (H107), 500 University Drive, P.O. Box 850, Hershey, PA 17033, USA
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Yang CH, Murti A, Pfeffer SR, Kim JG, Donner DB, Pfeffer LM. Interferon alpha /beta promotes cell survival by activating nuclear factor kappa B through phosphatidylinositol 3-kinase and Akt. J Biol Chem 2001; 276:13756-61. [PMID: 11278812 DOI: 10.1074/jbc.m011006200] [Citation(s) in RCA: 169] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Interferons (IFNs) play critical roles in host defense by modulating gene expression via activation of signal transducer and activator of transcription (STAT) factors. IFN-alpha/beta also activates another transcription factor, nuclear factor kappaB (NF-kappaB), which protects cells against apoptotic stimuli. NF-kappaB activation requires the IFN-dependent association of STAT3 with the IFNAR1 chain of the IFN receptor. IFN-dependent NF-kappaB activation involves the sequential activation of a serine kinase cascade involving phosphatidylinositol 3-kinase (PI-3K) and Akt. Whereas constitutively active PI-3K and Akt induce NF-kappaB activation, Ly294002 (a PI-3K inhibitor), dominant-negative PI-3K, and kinase-dead Akt block IFN-dependent NF-kappaB activation. Moreover, dominant-negative PI-3K blocks IFN-promoted degradation of kappaBox alpha. Ly294002, a dominant-negative PI-3K construct, and kinase-dead Akt block IFN-promoted cell survival, enhancing apoptotic cell death. Therefore, STAT3, PI-3K, and Akt are components of an IFN signaling pathway that promotes cell survival through NF-kappaB activation.
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Affiliation(s)
- C H Yang
- Department of Pathology, University of Tennessee Health Science Center, Memphis, Tennessee 38163, USA
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Yang CH, Murti A, Pfeffer SR, Basu L, Kim JG, Pfeffer LM. IFNalpha/beta promotes cell survival by activating NF-kappa B. Proc Natl Acad Sci U S A 2000; 97:13631-6. [PMID: 11095741 PMCID: PMC17627 DOI: 10.1073/pnas.250477397] [Citation(s) in RCA: 128] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
IFNs play critical roles in host defense by modulating the expression of various genes via signal transducer and activator of transcription factors. We show that IFNalpha/beta activates another important transcription factor, NF-kappaB. DNA-binding activity of NF-kappaB was induced by multiple type 1 IFNs and was promoted by IFN in a diverse group of human, monkey, rat, and murine cells. Human IFN promoted NF-kappaB activation in murine cells that express the human IFNalpha/beta receptor-1 signal-transducing chain of the type 1 IFN receptor. IFN promotes inhibitor of kappa B alpha (IkappaBalpha) serine phosphorylation and degradation, and stimulates NF-kappaB DNA-binding and transcriptional activity. Importantly, IFN promotes cell survival by protecting cells against a variety of proapoptotic stimuli, such as virus infection and antibody-mediated crosslinking. Expression of superrepressor forms of IkappaBalpha, besides inhibiting IFN-mediated NF-kappaB activation and IkappaBalpha degradation, also enhanced apoptotic cell death in IFN-treated cells. We conclude that NF-kappaB activation by IFNalpha/beta is integrated into a signaling pathway through the IFNalpha/beta receptor-1 chain of the type 1 IFN receptor that promotes cell survival in apposition to various apoptotic stimuli.
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Affiliation(s)
- C H Yang
- Department of Pathology, University of Tennessee Health Science Center, Memphis, TN 38163, USA
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Cremer I, Vieillard V, Sautès-Fridman C, De Maeyer E. Inhibition of human immunodeficiency virus transmission to CD4+ T cells after gene transfer of constitutively expressed interferon beta to dendritic cells. Hum Gene Ther 2000; 11:1695-703. [PMID: 10954903 DOI: 10.1089/10430340050111340] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
CD34(+)-derived dendritic cells (DCs) can be infected by the T cell-tropic HIVLAI strain, but are poorly permissive for efficient virus production. However, HIVLAI-infected DCs are able to transmit a vigorous cytopathic infection to activated CD4(+) T cells. We show that DCs differentiated from CD34(+) cells can be efficiently transduced by a retroviral vector carrying the IFN-beta coding sequence. This results in resistance to infection by HIV as shown by a threefold reduction in the HIV DNA copy number per cell, and by inhibition of HIV transmission from DCs to CD4(+) T cells. Moreover, constitutive IFN-beta production by DCs increases the synthesis of IL-12 and IFN-gamma Th1-type cytokines and of the beta-chemokines MIP-1alpha, MIP-1beta, and RANTES. This indicates that IFN-beta transduction of DCs blocks HIV infection and viral transmission to CD4(+) T cells, and could favor cellular immune responses in HIV-infected patients.
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Affiliation(s)
- I Cremer
- Laboratorie d'Immunologie Cellulaire et Clinique, INSERM U255, Institut Curie, Paris, France.
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Yu T, Xiao Y, Bai Y, Ru Q, Luo G, Dierich MP, Chen Y. Human interferon-beta inhibits binding of HIV-1 gp41 to lymphocyte and monocyte cells and binds the potential receptor protein P50 for HIV-1 gp41. Immunol Lett 2000; 73:19-22. [PMID: 10963806 DOI: 10.1016/s0165-2478(00)00196-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Previous findings have indicated that HIV-1 gp41 like human type I interferon (IFN) could inhibit lymphocyte proliferation and up-modulate MHC class I, II and ICAM-1 molecule expression, and a common epitope exists between gp41 and type I interferon (IFN-alpha and -beta) in the receptor binding regions. To clarify the relationship between human type I interferon and HIV-1 gp41, we tried to inhibit recombinant soluble gp41-binding to human T, B and monocyte cell lines by human IFN-alpha, -beta and -gamma. It was interestingly observed that IFN-beta after preincubating with cells could inhibit the binding of rsgp41 to H9, Raji and U937 cells (T, B and monocyte cell lines), while this binding could not be inhibited by another type I interferon (IFN-alpha) and a type II interferon (IFN-gamma). It was further examined whether human IFN-alpha and -beta bind to the gp41 binding protein P50. In ELISA-assay, the human IFN-beta, but not IFN-alpha, could bind to P50 which was identified as a potential cellular receptor protein for gp41-binding. By the affinity capillary electrophoresis (ACE) analysis, formation of stable IFN-beta-P50 complex was observed. These results indicate that IFN-beta binds the potential receptor protein P50. Based on these experimental evidences and previous studies, it was presumed that the potential cellular receptor protein P50 may be the 51 kDa subunit of human IFN-alpha/beta receptor, which needs to be verified in the future.
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Affiliation(s)
- T Yu
- Department of Biology, Laboratory of Immunology, Tsinghua University, Beijing 100084, People's Republic of China
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Cremer I, Vieillard V, De Maeyer E. Retrovirally mediated IFN-beta transduction of macrophages induces resistance to HIV, correlated with up-regulation of RANTES production and down-regulation of C-C chemokine receptor-5 expression. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2000; 164:1582-7. [PMID: 10640778 DOI: 10.4049/jimmunol.164.3.1582] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Constitutive expression of IFN-beta by HIV target cells may be an alternative or complementary therapeutic approach for the treatment of AIDS. We show that macrophages derived from CD34+ cells from umbilical cord blood can be efficiently transduced by a retroviral vector carrying the IFN-beta coding sequence. This results in resistance to infection by a macrophage-tropic HIV type 1, as shown by the drastic reduction in the HIV DNA copy number per cell and in p24 release. Moreover, IFN-beta transduction totally blocked secretion of proinflammatory cytokines after HIV infection. The constitutive IFN-beta production also resulted in an increased production of IL-12 and IFN-gamma Th1-type cytokines and of the beta-chemokines macrophage-inflammatory protein-1alpha, macrophage-inflammatory protein-1beta, and RANTES. RANTES was found to be involved in the HIV resistance observed, and this was correlated with a down-regulation of the CCR-5 HIV entry coreceptor. These results demonstrate the feasibility and the efficacy of such IFN-beta-mediated gene therapy. In addition to inhibiting HIV replication, IFN-beta transduction could have beneficial immune effects in HIV-infected patients by favoring cellular immune responses.
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Affiliation(s)
- I Cremer
- Equipe de l'Interferon et des Cytokines, Unité Mixte de Recherche 146, Centre National de la Recherche Scientifique Institut Curie, Orsay, France.
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Hadida F, De Maeyer E, Cremer I, Autran B, Baggiolini M, Debré P, Vieillard V. Acquired constitutive expression of interferon beta after gene transduction enhances human immunodeficiency virus type 1-specific cytotoxic T lymphocyte activity by a RANTES-dependent mechanism. Hum Gene Ther 1999; 10:1803-10. [PMID: 10446920 DOI: 10.1089/10430349950017482] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
CTL lines directed against HIV-1 antigens were generated from infected individuals and were transduced by the HMB-K(b)HuIFNbeta vector, resulting in low, constitutive expression of interferon beta (IFN-beta). The IFN-beta-transduced cells showed markedly increased HIV-1-specific, MHC class I-restricted CTL activity against HIV-1-LAI Gag, Pol, or Env antigens. This effect of IFN-beta was correlated with an overexpression of RANTES and completely abrogated by RANTES-blocking antibody. The present results provide the first evidence that IFN-beta transduction of CTL lines enhances HIV-specific cytotoxic activities through an upregulation of RANTES production. The efficient elimination of HIV-infected cells by IFN-beta-transduced CTL lines makes this gene therapy approach an attractive treatment for AIDS.
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Affiliation(s)
- F Hadida
- Laboratoire d'Immunologie Cellulaire, UMR 7627 CNRS, Hôpital Pitié-Salpétrière, Paris, France.
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Hematotherapy Literature Watch. JOURNAL OF HEMATOTHERAPY 1999; 8:223-8. [PMID: 10349916 DOI: 10.1089/106161299320505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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