1
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Dudek AM, Feist WN, Sasu EJ, Luna SE, Ben-Efraim K, Bak RO, Cepika AM, Porteus MH. A simultaneous knockout knockin genome editing strategy in HSPCs potently inhibits CCR5- and CXCR4-tropic HIV-1 infection. Cell Stem Cell 2024; 31:499-518.e6. [PMID: 38579682 DOI: 10.1016/j.stem.2024.03.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 12/29/2023] [Accepted: 03/06/2024] [Indexed: 04/07/2024]
Abstract
Allogeneic hematopoietic stem and progenitor cell transplant (HSCT) of CCR5 null (CCR5Δ32) cells can be curative for HIV-1-infected patients. However, because allogeneic HSCT poses significant risk, CCR5Δ32 matched bone marrow donors are rare, and CCR5Δ32 transplant does not confer resistance to the CXCR4-tropic virus, it is not a viable option for most patients. We describe a targeted Cas9/AAV6-based genome editing strategy for autologous HSCT resulting in both CCR5- and CXCR4-tropic HIV-1 resistance. Edited human hematopoietic stem and progenitor cells (HSPCs) maintain multi-lineage repopulation capacity in vivo, and edited primary human T cells potently inhibit infection by both CCR5-tropic and CXCR4-tropic HIV-1. Modification rates facilitated complete loss of CCR5-tropic replication and up to a 2,000-fold decrease in CXCR4-tropic replication without CXCR4 locus disruption. This multi-factor editing strategy in HSPCs could provide a broad approach for autologous HSCT as a functional cure for both CCR5-tropic and CXCR4-tropic HIV-1 infections.
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Affiliation(s)
- Amanda M Dudek
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA; Institute for Stem Cell Biology & Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - William N Feist
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA; Institute for Stem Cell Biology & Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Elena J Sasu
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA; Institute for Stem Cell Biology & Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Sofia E Luna
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA; Institute for Stem Cell Biology & Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Kaya Ben-Efraim
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA; Institute for Stem Cell Biology & Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Rasmus O Bak
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA; Department of Biomedicine, Aarhus University, 8000 Aarhus, Denmark; Aarhus Institute of Advanced Studies (AIAS), Aarhus University, 8000 Aarhus, Denmark
| | - Alma-Martina Cepika
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA; Institute for Stem Cell Biology & Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Matthew H Porteus
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA; Institute for Stem Cell Biology & Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA.
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2
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Cui G, Abe S, Kato R, Ikuta K. Insights into the heterogeneity of iNKT cells: tissue-resident and circulating subsets shaped by local microenvironmental cues. Front Immunol 2024; 15:1349184. [PMID: 38440725 PMCID: PMC10910067 DOI: 10.3389/fimmu.2024.1349184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 02/06/2024] [Indexed: 03/06/2024] Open
Abstract
Invariant natural killer T (iNKT) cells are a distinct subpopulation of innate-like T lymphocytes. They are characterized by semi-invariant T cell receptors (TCRs) that recognize both self and foreign lipid antigens presented by CD1d, a non-polymorphic MHC class I-like molecule. iNKT cells play a critical role in stimulating innate and adaptive immune responses, providing an effective defense against infections and cancers, while also contributing to chronic inflammation. The functions of iNKT cells are specific to their location, ranging from lymphoid to non-lymphoid tissues, such as the thymus, lung, liver, intestine, and adipose tissue. This review aims to provide insights into the heterogeneity of development and function in iNKT cells. First, we will review the expression of master transcription factors that define subsets of iNKT cells and their production of effector molecules such as cytokines and granzymes. In this article, we describe the gene expression profiles contributing to the kinetics, distribution, and cytotoxicity of iNKT cells across different tissue types. We also review the impact of cytokine production in distinct immune microenvironments on iNKT cell heterogeneity, highlighting a recently identified circulating iNKT cell subset. Additionally, we explore the potential of exploiting iNKT cell heterogeneity to create potent immunotherapies for human cancers in the future.
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Affiliation(s)
- Guangwei Cui
- Laboratory of Immune Regulation, Department of Virus Research, Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Shinya Abe
- Laboratory of Immune Regulation, Department of Virus Research, Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Ryoma Kato
- Laboratory of Immune Regulation, Department of Virus Research, Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan
- Faculty of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
| | - Koichi Ikuta
- Laboratory of Immune Regulation, Department of Virus Research, Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan
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3
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Wahl A, Yao W, Liao B, Chateau M, Richardson C, Ling L, Franks A, Senthil K, Doyon G, Li F, Frost J, Whitehurst CB, Pagano JS, Fletcher CA, Azcarate-Peril MA, Hudgens MG, Rogala AR, Tucker JD, McGowan I, Sartor RB, Garcia JV. A germ-free humanized mouse model shows the contribution of resident microbiota to human-specific pathogen infection. Nat Biotechnol 2023:10.1038/s41587-023-01906-5. [PMID: 37563299 PMCID: PMC11073568 DOI: 10.1038/s41587-023-01906-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 07/10/2023] [Indexed: 08/12/2023]
Abstract
Germ-free (GF) mice, which are depleted of their resident microbiota, are the gold standard for exploring the role of the microbiome in health and disease; however, they are of limited value in the study of human-specific pathogens because they do not support their replication. Here, we develop GF mice systemically reconstituted with human immune cells and use them to evaluate the role of the resident microbiome in the acquisition, replication and pathogenesis of two human-specific pathogens, Epstein-Barr virus (EBV) and human immunodeficiency virus (HIV). Comparison with conventional (CV) humanized mice showed that resident microbiota enhance the establishment of EBV infection and EBV-induced tumorigenesis and increase mucosal HIV acquisition and replication. HIV RNA levels were higher in plasma and tissues of CV humanized mice compared with GF humanized mice. The frequency of CCR5+ CD4+ T cells throughout the intestine was also higher in CV humanized mice, indicating that resident microbiota govern levels of HIV target cells. Thus, resident microbiota promote the acquisition and pathogenesis of two clinically relevant human-specific pathogens.
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Affiliation(s)
- Angela Wahl
- International Center for the Advancement of Translational Science, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
- Division of Infectious Diseases, Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
- Center for AIDS Research, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
| | - Wenbo Yao
- International Center for the Advancement of Translational Science, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Division of Infectious Diseases, Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Center for AIDS Research, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Baolin Liao
- International Center for the Advancement of Translational Science, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Division of Infectious Diseases, Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Center for AIDS Research, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - Morgan Chateau
- International Center for the Advancement of Translational Science, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Division of Infectious Diseases, Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Center for AIDS Research, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Cara Richardson
- International Center for the Advancement of Translational Science, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Division of Infectious Diseases, Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Center for AIDS Research, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Lijun Ling
- International Center for the Advancement of Translational Science, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Division of Infectious Diseases, Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Center for AIDS Research, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Adrienne Franks
- International Center for the Advancement of Translational Science, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Division of Infectious Diseases, Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Center for AIDS Research, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Krithika Senthil
- International Center for the Advancement of Translational Science, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Division of Infectious Diseases, Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Center for AIDS Research, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Genevieve Doyon
- International Center for the Advancement of Translational Science, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Division of Infectious Diseases, Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Center for AIDS Research, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Fengling Li
- Center for Gastrointestinal Biology and Disease, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Josh Frost
- Center for Gastrointestinal Biology and Disease, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Division of Comparative Medicine, Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Christopher B Whitehurst
- Department of Pathology, Microbiology, and Immunology, New York Medical College, Valhalla, NY, USA
| | - Joseph S Pagano
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Craig A Fletcher
- Division of Comparative Medicine, Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - M Andrea Azcarate-Peril
- Center for Gastrointestinal Biology and Disease, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Division of Gastroenterology and Hepatology, Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- UNC Microbiome Core, University of North Carolina, Chapel Hill, NC, USA
| | - Michael G Hudgens
- Department of Biostatistics, Gillings School of Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Allison R Rogala
- Center for Gastrointestinal Biology and Disease, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Division of Comparative Medicine, Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Joseph D Tucker
- Division of Infectious Diseases, Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Clinical Research Department, Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, London, UK
| | - Ian McGowan
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, University of Pittsburgh Medical School, Pittsburgh, PA, USA
- Orion Biotechnology, Ottawa, Ontario, Canada
| | - R Balfour Sartor
- Center for Gastrointestinal Biology and Disease, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Division of Gastroenterology and Hepatology, Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - J Victor Garcia
- International Center for the Advancement of Translational Science, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
- Division of Infectious Diseases, Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
- Center for AIDS Research, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
- Center for Gastrointestinal Biology and Disease, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
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4
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Verçosa BLA, Muniz-Junqueira MI, Menezes-Souza D, Fujiwara RT, Borges LDF, Melo MN, Vasconcelos AC. MCP-1/IL-12 ratio expressions correlated with adventitial collagen depositions in renal vessels and IL-4/IFN-γ expression correlated with interstitial collagen depositions in the kidneys of dogs with canine leishmaniasis. Mol Immunol 2023; 156:61-76. [PMID: 36889187 DOI: 10.1016/j.molimm.2023.02.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 02/04/2023] [Accepted: 02/13/2023] [Indexed: 03/08/2023]
Abstract
Collagen deposition is a common event in chronic inflammation, and canine Leishmaniosis (CanL) is generally associated with a long and chronic evolution. Considering that the kidney shows fibrinogenic changes during CanL, and the balance of cytokines/chemokines regulates the profibrinogenic and antifibrinogenic immune responses differently, it can be hypothesized that the balance of cytokines/chemokines can be differentially expressed in the renal tissue in order to determine the expression of collagen depositions in the kidneys. This study aimed to measure collagen deposition and to evaluate cytokine/chemokine expressions in the kidney by means of qRT-PCR in sixteen Leishmania-infected dogs and six uninfected controls. Kidney fragments were stained with hematoxylin & eosin (H&E), Masson's Trichrome, Picrosirius Red, and Gomori's reticulin. Intertubular and adventitial collagen depositions were evaluated by the morphometric approach. Cytokine RNA expressions were measured by means of qRT-PCR to identify molecules involved in chronic collagen depositions in kidneys with CanL. Collagen depositions were related to the presence of clinical signs, and more intense intertubular collagen depositions occurred in infected dogs. Adventitial collagen deposition, as morphometrically measured by the average area of the collagen, was more intense in clinically affected dogs than in subclinically infected dogs. TNF-α/TGF-β, MCP1/IL-12, CCL5/IL-12, IL-4/IFN-γ, and IL-12/TGF-β expressions were associated with clinical manifestations in dogs with CanL. The IL-4/IFN-α ratio was more commonly expressed and upregulated in clinically affected dogs, and downregulated in subclinically infected dogs. Furthermore, MCP-1/IL-12 and CCL5/IL-12 were more commonly expressed in subclinically infected dogs. Strong positive correlations were detected between morphometric values of interstitial collagen depositions and MCP-1/IL-12, IL-12, and IL-4 mRNA expression levels in the renal tissues. Adventitial collagen deposition was correlated with TGF-β, IL-4/IFN-γ, and TNF-α/TGF-β. In conclusion, our results showed the association of MCP-1/IL-12 and CCL5/IL-12 ratios with an absence of clinical signs, as well as an IL-4/IFN-α ratio with adventitial and intertubular collagen depositions in dogs with visceral leishmaniosis.
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Affiliation(s)
- Barbara Laurice Araújo Verçosa
- Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil; Laboratório de Imunologia Celular, Faculdade de Medicina, Universidade de Brasília, Brasília, Brazil.
| | | | - Daniel Menezes-Souza
- Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Ricardo Toshio Fujiwara
- Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Luciano de F Borges
- Instituto de Ciências Biológicas, Universidade Federal de São Paulo, São Paulo, São Paulo, Brazil
| | - Maria Norma Melo
- Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Anilton Cesar Vasconcelos
- Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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5
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Cui G, Shimba A, Jin J, Ogawa T, Muramoto Y, Miyachi H, Abe S, Asahi T, Tani-ichi S, Dijkstra JM, Iwamoto Y, Kryukov K, Zhu Y, Takami D, Hara T, Kitano S, Xu Y, Morita H, Zhang M, Zreka L, Miyata K, Kanaya T, Okumura S, Ito T, Hatano E, Takahashi Y, Watarai H, Oike Y, Imanishi T, Ohno H, Ohteki T, Minato N, Kubo M, Holländer GA, Ueno H, Noda T, Shiroguchi K, Ikuta K. A circulating subset of iNKT cells mediates antitumor and antiviral immunity. Sci Immunol 2022; 7:eabj8760. [DOI: 10.1126/sciimmunol.abj8760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Invariant natural killer T (iNKT) cells are a group of innate-like T lymphocytes that recognize lipid antigens. They are supposed to be tissue resident and important for systemic and local immune regulation. To investigate the heterogeneity of iNKT cells, we recharacterized iNKT cells in the thymus and peripheral tissues. iNKT cells in the thymus were divided into three subpopulations by the expression of the natural killer cell receptor CD244 and the chemokine receptor CXCR6 and designated as C0 (CD244
−
CXCR6
−
), C1 (CD244
−
CXCR6
+
), or C2 (CD244
+
CXCR6
+
) iNKT cells. The development and maturation of C2 iNKT cells from C0 iNKT cells strictly depended on IL-15 produced by thymic epithelial cells. C2 iNKT cells expressed high levels of IFN-γ and granzymes and exhibited more NK cell–like features, whereas C1 iNKT cells showed more T cell–like characteristics. C2 iNKT cells were influenced by the microbiome and aging and suppressed the expression of the autoimmune regulator AIRE in the thymus. In peripheral tissues, C2 iNKT cells were circulating that were distinct from conventional tissue-resident C1 iNKT cells. Functionally, C2 iNKT cells protected mice from the tumor metastasis of melanoma cells by enhancing antitumor immunity and promoted antiviral immune responses against influenza virus infection. Furthermore, we identified human CD244
+
CXCR6
+
iNKT cells with high cytotoxic properties as a counterpart of mouse C2 iNKT cells. Thus, this study reveals a circulating subset of iNKT cells with NK cell–like properties distinct from conventional tissue-resident iNKT cells.
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Affiliation(s)
- Guangwei Cui
- Laboratory of Immune Regulation, Department of Virus Research, Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Akihiro Shimba
- Laboratory of Immune Regulation, Department of Virus Research, Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan
- Department of Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Jianshi Jin
- Laboratory for Prediction of Cell Systems Dynamics, RIKEN Center for Biosystems Dynamics Research (BDR) , Osaka, Japan
| | - Taisaku Ogawa
- Laboratory for Prediction of Cell Systems Dynamics, RIKEN Center for Biosystems Dynamics Research (BDR) , Osaka, Japan
| | - Yukiko Muramoto
- Laboratory of Ultrastructural Virology, Department of Virus Research, Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Hitoshi Miyachi
- Reproductive Engineering Team, Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Shinya Abe
- Laboratory of Immune Regulation, Department of Virus Research, Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Takuma Asahi
- Laboratory of Immune Regulation, Department of Virus Research, Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan
- Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Shizue Tani-ichi
- Laboratory of Immune Regulation, Department of Virus Research, Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan
- Department of Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Johannes M. Dijkstra
- Institute for Comprehensive Medical Science, Fujita Health University, Aichi, Japan
| | - Yayoi Iwamoto
- Department of Immunology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Kirill Kryukov
- Biomedical Informatics Laboratory, Department of Molecular Life Science, Tokai University, Kanagawa, Japan
- Biological Networks Laboratory, Department of Informatics, National Institute of Genetics, Shizuoka, Japan
| | - Yuanbo Zhu
- Laboratory of Immune Regulation, Department of Virus Research, Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Daichi Takami
- Laboratory of Immune Regulation, Department of Virus Research, Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan
- Graduate School of Pharmaceutical Science, Kyoto University, Kyoto, Japan
| | - Takahiro Hara
- Laboratory of Immune Regulation, Department of Virus Research, Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Satsuki Kitano
- Reproductive Engineering Team, Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Yan Xu
- Medical Innovation Center, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Hajime Morita
- Department of Immunology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Moyu Zhang
- Department of Immunology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Lynn Zreka
- Department of Immunology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Keishi Miyata
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Takashi Kanaya
- Laboratory for Intestinal Ecosystem, RIKEN Center for Integrative Medical Sciences (IMS), Yokohama, Japan
| | - Shinya Okumura
- Division of Hepato-Biliary-Pancreatic Surgery and Transplantation, Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Takashi Ito
- Division of Hepato-Biliary-Pancreatic Surgery and Transplantation, Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Etsuro Hatano
- Division of Hepato-Biliary-Pancreatic Surgery and Transplantation, Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yoshimasa Takahashi
- Research Center for Drug and Vaccine Development, National Institute of Infectious Diseases, Tokyo, Japan
| | - Hiroshi Watarai
- Department of Immunology and Stem Cell Biology, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Ishikawa, Japan
| | - Yuichi Oike
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Tadashi Imanishi
- Biomedical Informatics Laboratory, Department of Molecular Life Science, Tokai University, Kanagawa, Japan
| | - Hiroshi Ohno
- Laboratory for Intestinal Ecosystem, RIKEN Center for Integrative Medical Sciences (IMS), Yokohama, Japan
| | - Toshiaki Ohteki
- Department of Biodefense Research, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan
| | - Nagahiro Minato
- Medical Innovation Center, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Masato Kubo
- Laboratory for Cytokine Regulation, RIKEN Center for Integrative Medical Sciences (IMS), Yokohama, Japan
- Division of Molecular Pathology, Research Institute for Biomedical Science, Tokyo University of Science, Chiba, Japan
| | - Georg A. Holländer
- Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
- Pediatric Immunology, Department of Biomedicine, University of Basel and University Children’s Hospital Basel, Basel, Switzerland
- Department of Biosystems Science and Engineering, ETH Zurich, Basel, Switzerland
| | - Hideki Ueno
- Department of Immunology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Takeshi Noda
- Laboratory of Ultrastructural Virology, Department of Virus Research, Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Katsuyuki Shiroguchi
- Laboratory for Prediction of Cell Systems Dynamics, RIKEN Center for Biosystems Dynamics Research (BDR) , Osaka, Japan
| | - Koichi Ikuta
- Laboratory of Immune Regulation, Department of Virus Research, Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan
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6
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Pedersen JG, Egedal JH, Packard TA, Thavachelvam K, Xie G, van der Sluis RM, Greene WC, Roan NR, Jakobsen MR. Cell-Extrinsic Priming Increases Permissiveness of CD4+ T Cells to Human Immunodeficiency Virus Infection by Increasing C-C Chemokine Receptor Type 5 Co-receptor Expression and Cellular Activation Status. Front Microbiol 2021; 12:763030. [PMID: 34899645 PMCID: PMC8661899 DOI: 10.3389/fmicb.2021.763030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 11/05/2021] [Indexed: 11/13/2022] Open
Abstract
The chemokine receptor CCR5 is expressed on multiple cell types, including macrophages, dendritic cells, and T cells, and is the major co-receptor used during HIV transmission. Using a standard αCD3/CD28 in vitro stimulation protocol to render CD4+ T cells from PBMCs permissive to HIV infection, we discovered that the percentage of CCR5+ T cells was significantly elevated in CD4+ T cells when stimulated in the presence of peripheral blood mononuclear cells (PBMCs) as compared to when stimulated as purified CD4+ T cells. This indicated that environmental factors unique to the T-PBMCs condition affect surface expression of CCR5 on CD4+ T cells. Conditioned media from αCD3/CD28-stimulated PBMCs induced CCR5 expression in cultures of unstimulated cells. Cytokine profile analysis of these media suggests IL-12 as an inducer of CCR5 expression. Mass cytometric analysis showed that stimulated T-PBMCs exhibited a uniquely activated phenotype compared to T-Pure. In line with increased CCR5 expression and activation status in stimulated T-PBMCs, CD4+ T cells from these cultures were more susceptible to infection by CCR5-tropic HIV-1 as compared with T-Pure cells. These results suggest that in order to increase ex vivo infection rates of blood-derived CD4+ T cells, standard stimulation protocols used in HIV infection studies should implement T-PBMCs or purified CD4+ T cells should be supplemented with IL-12.
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Affiliation(s)
| | - Johanne H Egedal
- Department of Biomedicine, Aarhus University, Aarhus, Denmark.,Gladstone Institute of Virology, San Francisco, CA, United States
| | - Thomas A Packard
- Gladstone Institute of Virology, San Francisco, CA, United States
| | | | - Guorui Xie
- Gladstone Institute of Virology, San Francisco, CA, United States.,Department of Urology, University of California, San Francisco, San Francisco, CA, United States
| | - Renée Marije van der Sluis
- Department of Biomedicine, Aarhus University, Aarhus, Denmark.,Aarhus Institute of Advanced Studies, Aarhus University, Aarhus, Denmark
| | - Warner C Greene
- Gladstone Institute of Virology, San Francisco, CA, United States
| | - Nadia R Roan
- Gladstone Institute of Virology, San Francisco, CA, United States.,Department of Urology, University of California, San Francisco, San Francisco, CA, United States
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7
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Baruah V, Tiwari D, Hazam RK, Bose M, Bujarbaruah D, Saikia AK, Kar P, Dutta S, Bose S. Prognostic, clinical, and therapeutic importance of RANTES-CCR5 axis in hepatitis A infection: A multiapproach study. J Med Virol 2021; 93:3656-3665. [PMID: 32975838 DOI: 10.1002/jmv.26557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Revised: 08/28/2020] [Accepted: 09/23/2020] [Indexed: 11/08/2022]
Abstract
Fulminant hepatic failure (FHF) is a lethal manifestation of hepatitis A virus (HAV) infection, whose underlying mechanisms are poorly understood. We aimed to evaluate the importance of the modulation of the RANTES-chemokine receptor type 5 (CCR5) signaling axis and its immunomodulatory effects in directing hepatitis A disease pathogenesis using an in silico, in vitro and patient cohort-based approach. In silico interaction studies were performed using computation approaches with suitable software. Differential expression of relevant cytokines and immune cell markers were studied using real-time quantitative reverse transcription PCR (qRT-PCR), enzyme-linked immunosorbent assay, and flow-cytometry-based methods. In the HepG2 cell line, we studied inflammatory responses and susceptibility to HAV infection following RANTES stimulation and antibody blockade of CCR5. The HAV-VP3 region exhibited high interaction in CCR5: HAV complexes. RANTES levels were significantly increased in FHF cases. Reduced monocyte and T-cell activation were observed in FHF cases. RANTES expression inversely correlated with viremia but positively correlated with proinflammatory responses. Hyper Th1-biased immune responses, marked by high interleukin (IL)-12/IL-10 ratio were observed in FHF cases, which were also characterized by upregulated tumor necrosis factor-alpha (TNF-α) expression and reduced interferon-gamma expression. In vitro, RANTES was protective against HAV infection but resulted in upregulated TNF-α expression. Although viral load increased upon the regulation of inflammatory responses by CCR5 blocking, it was still significantly lower compared to control HAV-infected cells. Our study suggests the importance of RANTES-CCR5 signaling and linked-immunomodulation in HAV disease pathogenesis, as well as highlights the utility of CCR5 antagonists as a risk-reduction strategy in FHF patients. Our findings, therefore, have important implications for the management of high-risk HAV infections.
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Affiliation(s)
- Vargab Baruah
- Department of Biotechnology, Gauhati University, Guwahati, Assam, India
| | - Diptika Tiwari
- Department of Biotechnology, Gauhati University, Guwahati, Assam, India
| | | | - Moumita Bose
- Department of Biotechnology, Gauhati University, Guwahati, Assam, India
| | | | - Anjan Kumar Saikia
- Department of Gastroenterology and Hepatology, GNRC Hospital, Guwahati, Assam, India
| | - Premashish Kar
- Department of Biotechnology, Gauhati University, Guwahati, Assam, India
| | - Sangit Dutta
- Department of Gastroenterology, GMCH Hospital, Guwahati, Assam, India
| | - Sujoy Bose
- Department of Biotechnology, Gauhati University, Guwahati, Assam, India
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8
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CCR5 Revisited: How Mechanisms of HIV Entry Govern AIDS Pathogenesis. J Mol Biol 2018; 430:2557-2589. [PMID: 29932942 DOI: 10.1016/j.jmb.2018.06.027] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 06/10/2018] [Accepted: 06/13/2018] [Indexed: 01/01/2023]
Abstract
The chemokine receptor CCR5 has been the focus of intensive studies since its role as a coreceptor for HIV entry was discovered in 1996. These studies lead to the development of small molecular drugs targeting CCR5, with maraviroc becoming in 2007 the first clinically approved chemokine receptor inhibitor. More recently, the apparent HIV cure in a patient transplanted with hematopoietic stem cells devoid of functional CCR5 rekindled the interest for inactivating CCR5 through gene therapy and pharmacological approaches. Fundamental research on CCR5 has also been boosted by key advances in the field of G-protein coupled receptor research, with the realization that CCR5 adopts a variety of conformations, and that only a subset of these conformations may be targeted by chemokine ligands. In addition, recent genetic and pathogenesis studies have emphasized the central role of CCR5 expression levels in determining the risk of HIV and SIV acquisition and disease progression. In this article, we propose to review the key properties of CCR5 that account for its central role in HIV pathogenesis, with a focus on mechanisms that regulate CCR5 expression, conformation, and interaction with HIV envelope glycoproteins.
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9
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Abstract
The modulation of tuberculosis (TB)-induced immunopathology caused by human immunodeficiency virus (HIV)-1 coinfection remains incompletely understood but underlies the change seen in the natural history, presentation, and prognosis of TB in such patients. The deleterious combination of these two pathogens has been dubbed a "deadly syndemic," with each favoring the replication of the other and thereby contributing to accelerated disease morbidity and mortality. HIV-1 is the best-recognized risk factor for the development of active TB and accounts for 13% of cases globally. The advent of combination antiretroviral therapy (ART) has considerably mitigated this risk. Rapid roll-out of ART globally and the recent recommendation by the World Health Organization (WHO) to initiate ART for everyone living with HIV at any CD4 cell count should lead to further reductions in HIV-1-associated TB incidence because susceptibility to TB is inversely proportional to CD4 count. However, it is important to note that even after successful ART, patients with HIV-1 are still at increased risk for TB. Indeed, in settings of high TB incidence, the occurrence of TB often remains the first presentation of, and thereby the entry into, HIV care. As advantageous as ART-induced immune recovery is, it may also give rise to immunopathology, especially in the lower-CD4-count strata in the form of the immune reconstitution inflammatory syndrome. TB-immune reconstitution inflammatory syndrome will continue to impact the HIV-TB syndemic.
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10
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Jaumdally SZ, Picton A, Tiemessen CT, Paximadis M, Jaspan HB, Gamieldien H, Masson L, Coetzee D, Williamson AL, Little F, Gumbi PP, Passmore JAS. CCR5 expression, haplotype and immune activation in protection from infection in HIV-exposed uninfected individuals in HIV-serodiscordant relationships. Immunology 2017; 151:464-473. [PMID: 28398593 DOI: 10.1111/imm.12743] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Revised: 03/16/2017] [Accepted: 03/24/2017] [Indexed: 12/01/2022] Open
Abstract
Several host factors have been implicated in resistance to HIV infection in individuals who remain HIV-seronegative despite exposure. In a cohort of HIV-serodiscordant heterosexual couples, we investigated interactions between systemic inflammation and T-cell activation in resistance to HIV infection. Males and females in stable long-term relationships with either HIV-infected or uninfected partners were recruited, blood T-cell activation (CD38, HLA-DR, CCR5 and Ki67) and plasma cytokine concentrations were evaluated. The HIV-negative exposed individuals had significantly lower frequencies of CCR5+ CD4+ and CD8+ T cells than unexposed individuals. Mean fluorescence intensity of CCR5 expression on CD4+ T cells was significantly lower in HIV-negative exposed than unexposed individuals. Protective CCR5 haplotypes (HHA/HHF*2, HHF*2/HHF*2, HHC/HHF*2, HHA/HHA, HHA/HHC and HHA/HHD) tended to be over-represented in exposed compared with unexposed individuals (38% versus 28%, P = 0·58) whereas deleterious genotypes (HHC/HHD, HHC/HHE, HHD/HHE, HHD/HHD and HHE/HHE) were under-represented (26% versus 44%; P = 0·16). Plasma concentrations of interleukin-2 (P = 0·02), interferon-γ (P = 0·05) and granulocyte-macrophage colony-stimulating factor (P = 0·006) were lower in exposed compared with unexposed individuals. Activation marker expression and systemic cytokine concentrations were not influenced by gender. We conclude that the dominant signature of resistance to HIV infection in this cohort of exposed but uninfected individuals was lower T-cell CCR5 expression and plasma cytokine concentrations.
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Affiliation(s)
- Shameem Z Jaumdally
- Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.,NRF-DST Centre of Excellence in HIV Prevention, CAPRISA, Durban, South Africa
| | - Anabela Picton
- Centre for HIV and STIs, National Institute for Communicable Diseases, National Health Laboratory Service, Johannesburg, South Africa.,Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Caroline T Tiemessen
- Centre for HIV and STIs, National Institute for Communicable Diseases, National Health Laboratory Service, Johannesburg, South Africa.,Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Maria Paximadis
- Centre for HIV and STIs, National Institute for Communicable Diseases, National Health Laboratory Service, Johannesburg, South Africa.,Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Heather B Jaspan
- Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Hoyam Gamieldien
- Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Lindi Masson
- Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.,NRF-DST Centre of Excellence in HIV Prevention, CAPRISA, Durban, South Africa
| | - David Coetzee
- Centre for Infectious Disease Epidemiology and Research, School of Public Health and Family Medicine, University of Cape Town, Cape Town, South Africa
| | - Anna-Lise Williamson
- Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.,National Health Laboratory Service, Cape Town, South Africa
| | - Francesca Little
- Department of Statistical Sciences, University of Cape Town, Cape Town, South Africa
| | - Pamela P Gumbi
- Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.,NRF-DST Centre of Excellence in HIV Prevention, CAPRISA, Durban, South Africa
| | - Jo-Ann S Passmore
- Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.,NRF-DST Centre of Excellence in HIV Prevention, CAPRISA, Durban, South Africa.,National Health Laboratory Service, Cape Town, South Africa
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11
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Holmannova D, Kolackova M, Mandak J, Kunes P, Holubcova Z, Holubec T, Krejsek J. Effects of conventional CPB and mini-CPB on neutrophils CD162, CD166 and CD195 expression. Perfusion 2016; 32:141-150. [PMID: 27625334 DOI: 10.1177/0267659116669586] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
OBJECTIVE Cardiac surgery is known to trigger a systemic inflammatory response. While the use of conventional cardiopulmonary bypass (CPB) results in profound inflammation, modified mini-CPB is considered less harmful. We evaluated the impact of cardiac surgery on the expression of CD162, CD166, CD195 molecules and their association with the type of CPB used. METHODS AND RESULTS Twenty-four patients were enrolled in our study. Twelve of them were operated using conventional CPB while the other twelve patients underwent surgery with mini-CPB. Blood samples were analysed by flow cytometry. We observed a significant increase in median fluorescence intensity of CD162 and CD195 that peaked instantly after surgery and normalized to the baseline value on the 1st day post surgery, whereas CD166 was initially down-regulated and its median fluorescence intensity (MFI) value increased to the baseline in the next few days. CONCLUSION We observed immediate changes in the expression of CD162, CD166, and CD195 molecules on the neutrophils after surgery in both study groups of patients. The intensity of the observed changes was significantly greater in the group of patients who underwent conventional CPB compared to patients who underwent mini-CPB cardiac surgery.
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Affiliation(s)
- Drahomira Holmannova
- 1 Department of Clinical Immunology, Charles University in Prague, Faculty of Medicine and University Hospital, Hradec Kralove, Czech Republic
| | - Martina Kolackova
- 1 Department of Clinical Immunology, Charles University in Prague, Faculty of Medicine and University Hospital, Hradec Kralove, Czech Republic
| | - Jiri Mandak
- 2 Department of Cardiac Surgery, Charles University in Prague, Faculty of Medicine and University Hospital, Hradec Kralove, Czech Republic
| | - Pavel Kunes
- 2 Department of Cardiac Surgery, Charles University in Prague, Faculty of Medicine and University Hospital, Hradec Kralove, Czech Republic
| | - Zdenka Holubcova
- 2 Department of Cardiac Surgery, Charles University in Prague, Faculty of Medicine and University Hospital, Hradec Kralove, Czech Republic
| | - Tomas Holubec
- 3 Division of Cardiovascular Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Jan Krejsek
- 1 Department of Clinical Immunology, Charles University in Prague, Faculty of Medicine and University Hospital, Hradec Kralove, Czech Republic
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12
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Ahmad SF, Ansari MA, Nadeem A, Zoheir KMA, Bakheet SA, Al-Shabanah OA, Al Rikabi AC, Attia SM. The tyrosine kinase inhibitor tyrphostin AG126 reduces activation of inflammatory cells and increases Foxp3 + regulatory T cells during pathogenesis of rheumatoid arthritis. Mol Immunol 2016; 78:65-78. [PMID: 27608299 DOI: 10.1016/j.molimm.2016.08.017] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 08/24/2016] [Accepted: 08/31/2016] [Indexed: 12/31/2022]
Abstract
Protein tyrosine kinases are key mediators of the signal transduction cascades that control expression of many genes involved in the induction of inflammation caused by arthritis. Here we investigate the effect of the tyrosine kinase inhibitor tyrphostin AG126 on a mouse model of adjuvant-induced arthritis (AIA). We report that when given at 5mg/kg i.p. every 48h from days 0-21, AG126 exerts potent anti-arthritic effects. Further, we investigated the role of AG126 on the key mediators of arthritic inflammation, namely, edema, arthritic score, presence of immunophenotypes including Foxp3+, CD4+Foxp3+, and CD25+Foxp3+ T regulatory (Treg) cells, as well as pro- and anti-inflammatory mediators. AG126 treatment significantly attenuated the severity of AIA and caused a substantial reduction in the percentage of CD2+, CD3+, CD4+, CD8+, CD23+, CD80+, CD86+ CD122+, CD195+, TCRβ+, and GITR+ cells in whole blood. Moreover, administration of AG126 under arthritis-inducing conditions resulted in suppression of IL-17A+, IFN-γ+, CD4+ and CD25+ populations while causing an increase in the Foxp3+, CD4+Foxp3+, and CD25+Foxp3+ Treg populations in the spleen. In addition, RT-PCR analysis revealed increased expression of CD4, CD8, IL-17A, IFN-γ, TNF-α, and NF-κB p65 mRNAs and decreased IL-4 mRNA in the arthritic control (AC) mice, while treatment of animals with AG126 reversed these effects. Western blot analysis confirmed the decreased expression of IL-17, GITR, NF-κB p65 proteins and increased Foxp3 and IL-4 proteins following AG126 treatment of knee tissue. Thus, our findings provide new evidence that inhibition of protein tyrosine kinase activity decreases the progression of arthritis.
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Affiliation(s)
- Sheikh Fayaz Ahmad
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia.
| | - Mushtaq Ahmad Ansari
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Ahmed Nadeem
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Khairy M A Zoheir
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia; Department of Cell Biology, National Research Center, Cairo, Egypt
| | - Saleh A Bakheet
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Othman A Al-Shabanah
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Ammar Cherkess Al Rikabi
- Department of Pathology, College of Medicine & King Khalid University Hospital, King Saud University, Riyadh, Saudi Arabia
| | - Sabry M Attia
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia; Department of Pharmacology and Toxicology, College of Pharmacy, Al-Azhar University, Cairo, Egypt
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13
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Expression and Cellular Distribution of the Interleukin 2 Signaling System in Cortical Lesions From Patients With Focal Cortical Dysplasia. J Neuropathol Exp Neurol 2014; 73:206-22. [DOI: 10.1097/nen.0000000000000042] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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14
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Gavegnano C, Detorio M, Montero C, Bosque A, Planelles V, Schinazi RF. Ruxolitinib and tofacitinib are potent and selective inhibitors of HIV-1 replication and virus reactivation in vitro. Antimicrob Agents Chemother 2014; 58:1977-86. [PMID: 24419350 PMCID: PMC4023721 DOI: 10.1128/aac.02496-13] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Accepted: 01/08/2014] [Indexed: 12/18/2022] Open
Abstract
The JAK-STAT pathway is activated in both macrophages and lymphocytes upon human immunodeficiency virus type 1 (HIV-1) infection and thus represents an attractive cellular target to achieve HIV suppression and reduced inflammation, which may impact virus sanctuaries. Ruxolitinib and tofacitinib are JAK1/2 inhibitors that are FDA approved for rheumatoid arthritis and myelofibrosis, respectively, but their therapeutic application for treatment of HIV infection was unexplored. Both drugs demonstrated submicromolar inhibition of infection with HIV-1, HIV-2, and a simian-human immunodeficiency virus, RT-SHIV, across primary human or rhesus macaque lymphocytes and macrophages, with no apparent significant cytotoxicity at 2 to 3 logs above the median effective antiviral concentration. Combination of tofacitinib and ruxolitinib increased the efficacy by 53- to 161-fold versus that observed for monotherapy, respectively, and each drug applied alone to primary human lymphocytes displayed similar efficacy against HIV-1 containing various polymerase substitutions. Both drugs inhibited virus replication in lymphocytes stimulated with phytohemagglutinin (PHA) plus interleukin-2 (IL-2), but not PHA alone, and inhibited reactivation of latent HIV-1 at low-micromolar concentrations across the J-Lat T cell latency model and in primary human central memory lymphocytes. Thus, targeted inhibition of JAK provided a selective, potent, and novel mechanism to inhibit HIV-1 replication in lymphocytes and macrophages, replication of drug-resistant HIV-1, and reactivation of latent HIV-1 and has the potential to reset the immunologic milieu in HIV-infected individuals.
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Affiliation(s)
- Christina Gavegnano
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia, USA
- Veterans Affairs Medical Center, Decatur, Georgia, USA
| | - Mervi Detorio
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia, USA
- Veterans Affairs Medical Center, Decatur, Georgia, USA
| | - Catherine Montero
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia, USA
- Veterans Affairs Medical Center, Decatur, Georgia, USA
| | - Alberto Bosque
- Department of Pathology, University of Utah, Salt Lake City, Utah, USA
| | - Vicente Planelles
- Department of Pathology, University of Utah, Salt Lake City, Utah, USA
| | - Raymond F. Schinazi
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia, USA
- Veterans Affairs Medical Center, Decatur, Georgia, USA
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15
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Picton ACP, Shalekoff S, Paximadis M, Tiemessen CT. Marked differences in CCR5 expression and activation levels in two South African populations. Immunology 2012; 136:397-407. [PMID: 22509959 DOI: 10.1111/j.1365-2567.2012.03592.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
The chemokine receptor CCR5 is pivotal in determining an individual's susceptibility to HIV-1 infection and rate of disease progression. To establish whether population-based differences exist in cell surface expression of CCR5 we evaluated the extent of CCR5 expression across all peripheral blood cell types in individuals from two populations, South African Africans (SAA) and South African Caucasians (SAC). Significant differences in CCR5 expression, both in number of CCR5 molecules per cell (density) and the percentage of CCR5-expressing cells, were observed between the two study groups, within all cell subsets. Most notably, the percentage of all CCR5(+) cell subsets was significantly lower in SAC compared with SAA individuals (P < 0·01) among natural killer (NK) -cell subsets (CD56(+) , CD16(+) CD56(+) and CD56(dim) ) whereas CCR5 density was significantly higher in SAC compared with SAA individuals in CCR5(+) CD8(+) T-cell subsets and CCR5(+) NK-cell subsets (CD56(+) , CD16(+) CD56(+) and CD56(dim) ) (all P < 0·05). These relationships were maintained after exclusion of CCR5Δ32 heterozygous individuals (n = 7) from the SAC dataset. The SAA individuals exhibited significantly higher cell activation levels, as measured by HLA-DR expression, than SAC individuals in CD4(+) T-cell subsets (P = 0·002) and CD56(+) NK-cell subsets (P < 0·001). This study serves to demonstrate that ethnically divergent populations show marked differences in both cell activation and CCR5 expression, which are likely to impact on both susceptibility to HIV-1 infection and the rate of HIV-1 disease progression.
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Affiliation(s)
- Anabela C P Picton
- Centre for HIV and STIs, National Institute for Communicable Diseases, Johannesburg, South Africa
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16
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Picton ACP, Paximadis M, Tiemessen CT. CCR5 promoter haplotypes differentially influence CCR5 expression on natural killer and T cell subsets in ethnically divergent HIV-1 uninfected South African populations. Immunogenetics 2012; 64:795-806. [DOI: 10.1007/s00251-012-0642-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Accepted: 07/29/2012] [Indexed: 11/25/2022]
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17
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Taaffe JE, Bosinger SE, Del Prete GQ, Else JG, Ratcliffe S, Ward CD, Migone T, Paiardini M, Silvestri G. CCR5 blockade is well tolerated and induces changes in the tissue distribution of CCR5+ and CD25+ T cells in healthy, SIV-uninfected rhesus macaques. J Med Primatol 2011; 41:24-42. [PMID: 22077380 DOI: 10.1111/j.1600-0684.2011.00521.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND CCR5 is a main co-receptor for HIV, but also homes lymphocytes to sites of inflammation. We hypothesized that inhibition of CCR5 signaling would reduce HIV-associated chronic immune activation. METHODS To test this hypothesis, we administered an antagonistic anti-CCR5 monoclonal antibody (HGS101) to five uninfected rhesus macaques (RMs) and monitored lymphocyte dynamics in blood and tissue. RESULTS CCR5 blockade resulted in decreased levels of CCR5+ T cells in blood and, at later timepoints, in lymph nodes. Additionally, the levels of CD25+ T cells increased in lymph nodes, but decreased in blood, bone marrow, and rectal mucosa. Finally, a profile of gene expression from HGS101-treated RMs revealed a subtle, but consistent, in vivo signature of CCR5 blockade that suggests a mild immune-modulatory effect. CONCLUSIONS Treatment with anti-CCR5 antibody induces changes in the tissue distribution of CCR5+ and CD25+ T cells that may impact on the overall levels of immune activation during HIV and SIV infection.
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Affiliation(s)
- Jessica E Taaffe
- Yerkes National Primate Research Center, Emory University, Atlanta, GA 30329, USA
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18
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Nakajima K, Yamashita T, Kita T, Takeda M, Sasaki N, Kasahara K, Shinohara M, Rikitake Y, Ishida T, Yokoyama M, Hirata KI. Orally Administered Eicosapentaenoic Acid Induces Rapid Regression of Atherosclerosis Via Modulating the Phenotype of Dendritic Cells in LDL Receptor-Deficient Mice. Arterioscler Thromb Vasc Biol 2011; 31:1963-72. [DOI: 10.1161/atvbaha.111.229443] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Objective—
Eicosapentaenoic acid (EPA) has been shown to have beneficial effects on cardiovascular diseases, although the precise mechanism is unknown. We investigated the effect of EPA on the regression of atherosclerosis.
Methods and Results—
LDL-receptor–deficient mice were fed a high-cholesterol diet for 8 weeks to build up aortic sinus atherosclerotic lesions and then were fed a normal diet with or without 5% EPA for 4 weeks. Atherosclerotic lesions were histologically assessed, and immunologic assays were performed. EPA treatment significantly regressed atherosclerosis (−22.7%,
P
<0.05) and decreased the content of macrophages, CD4
+
T cells, and dendritic cells (DCs) in atherosclerotic lesions, though only changing the chow never induced the regression. Flow cytometric analysis revealed that EPA increased immature DCs (CD11c
+
CD80
−
CD86
−
), increased the indoleamine 2,3-dioxygenase (IDO) in DCs, and decreased the number of CD4
+
T cells. In the presence of the IDO inhibitor, the beneficial effects of EPA on regression were inhibited, suggesting that the effect of EPA was mainly mediated through IDO.
Conclusion—
In addition to lowering plasma cholesterol, EPA regressed atherosclerosis probably due to modulation of DC phenotype and reduction in T cell numbers. The present findings might partly explain the beneficial effects of EPA in clinics and support clinical evidence.
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Affiliation(s)
- Kenji Nakajima
- From the Division of Cardiovascular Medicine, Department of Internal Medicine (K.N., T.Y., T.K., M.T., N.S., K.K., M.S., Y.R., T.I., M.Y., K.H.), Division of Signal Transduction, Department of Biochemistry and Molecular Biology (Y.R.), Kobe University Graduate School of Medicine, Kobe, Japan, Department of Experimental Pathology, Institute for Frontier Medical Science (N.S.), Kyoto University, Kyoto, Japan, and Hyogo Brain and Heart Center (M.Y.), Himegli, Japan
| | - Tomoya Yamashita
- From the Division of Cardiovascular Medicine, Department of Internal Medicine (K.N., T.Y., T.K., M.T., N.S., K.K., M.S., Y.R., T.I., M.Y., K.H.), Division of Signal Transduction, Department of Biochemistry and Molecular Biology (Y.R.), Kobe University Graduate School of Medicine, Kobe, Japan, Department of Experimental Pathology, Institute for Frontier Medical Science (N.S.), Kyoto University, Kyoto, Japan, and Hyogo Brain and Heart Center (M.Y.), Himegli, Japan
| | - Tomoyuki Kita
- From the Division of Cardiovascular Medicine, Department of Internal Medicine (K.N., T.Y., T.K., M.T., N.S., K.K., M.S., Y.R., T.I., M.Y., K.H.), Division of Signal Transduction, Department of Biochemistry and Molecular Biology (Y.R.), Kobe University Graduate School of Medicine, Kobe, Japan, Department of Experimental Pathology, Institute for Frontier Medical Science (N.S.), Kyoto University, Kyoto, Japan, and Hyogo Brain and Heart Center (M.Y.), Himegli, Japan
| | - Masafumi Takeda
- From the Division of Cardiovascular Medicine, Department of Internal Medicine (K.N., T.Y., T.K., M.T., N.S., K.K., M.S., Y.R., T.I., M.Y., K.H.), Division of Signal Transduction, Department of Biochemistry and Molecular Biology (Y.R.), Kobe University Graduate School of Medicine, Kobe, Japan, Department of Experimental Pathology, Institute for Frontier Medical Science (N.S.), Kyoto University, Kyoto, Japan, and Hyogo Brain and Heart Center (M.Y.), Himegli, Japan
| | - Naoto Sasaki
- From the Division of Cardiovascular Medicine, Department of Internal Medicine (K.N., T.Y., T.K., M.T., N.S., K.K., M.S., Y.R., T.I., M.Y., K.H.), Division of Signal Transduction, Department of Biochemistry and Molecular Biology (Y.R.), Kobe University Graduate School of Medicine, Kobe, Japan, Department of Experimental Pathology, Institute for Frontier Medical Science (N.S.), Kyoto University, Kyoto, Japan, and Hyogo Brain and Heart Center (M.Y.), Himegli, Japan
| | - Kazuyuki Kasahara
- From the Division of Cardiovascular Medicine, Department of Internal Medicine (K.N., T.Y., T.K., M.T., N.S., K.K., M.S., Y.R., T.I., M.Y., K.H.), Division of Signal Transduction, Department of Biochemistry and Molecular Biology (Y.R.), Kobe University Graduate School of Medicine, Kobe, Japan, Department of Experimental Pathology, Institute for Frontier Medical Science (N.S.), Kyoto University, Kyoto, Japan, and Hyogo Brain and Heart Center (M.Y.), Himegli, Japan
| | - Masakazu Shinohara
- From the Division of Cardiovascular Medicine, Department of Internal Medicine (K.N., T.Y., T.K., M.T., N.S., K.K., M.S., Y.R., T.I., M.Y., K.H.), Division of Signal Transduction, Department of Biochemistry and Molecular Biology (Y.R.), Kobe University Graduate School of Medicine, Kobe, Japan, Department of Experimental Pathology, Institute for Frontier Medical Science (N.S.), Kyoto University, Kyoto, Japan, and Hyogo Brain and Heart Center (M.Y.), Himegli, Japan
| | - Yoshiyuki Rikitake
- From the Division of Cardiovascular Medicine, Department of Internal Medicine (K.N., T.Y., T.K., M.T., N.S., K.K., M.S., Y.R., T.I., M.Y., K.H.), Division of Signal Transduction, Department of Biochemistry and Molecular Biology (Y.R.), Kobe University Graduate School of Medicine, Kobe, Japan, Department of Experimental Pathology, Institute for Frontier Medical Science (N.S.), Kyoto University, Kyoto, Japan, and Hyogo Brain and Heart Center (M.Y.), Himegli, Japan
| | - Tatsuro Ishida
- From the Division of Cardiovascular Medicine, Department of Internal Medicine (K.N., T.Y., T.K., M.T., N.S., K.K., M.S., Y.R., T.I., M.Y., K.H.), Division of Signal Transduction, Department of Biochemistry and Molecular Biology (Y.R.), Kobe University Graduate School of Medicine, Kobe, Japan, Department of Experimental Pathology, Institute for Frontier Medical Science (N.S.), Kyoto University, Kyoto, Japan, and Hyogo Brain and Heart Center (M.Y.), Himegli, Japan
| | - Mitsuhiro Yokoyama
- From the Division of Cardiovascular Medicine, Department of Internal Medicine (K.N., T.Y., T.K., M.T., N.S., K.K., M.S., Y.R., T.I., M.Y., K.H.), Division of Signal Transduction, Department of Biochemistry and Molecular Biology (Y.R.), Kobe University Graduate School of Medicine, Kobe, Japan, Department of Experimental Pathology, Institute for Frontier Medical Science (N.S.), Kyoto University, Kyoto, Japan, and Hyogo Brain and Heart Center (M.Y.), Himegli, Japan
| | - Ken-ichi Hirata
- From the Division of Cardiovascular Medicine, Department of Internal Medicine (K.N., T.Y., T.K., M.T., N.S., K.K., M.S., Y.R., T.I., M.Y., K.H.), Division of Signal Transduction, Department of Biochemistry and Molecular Biology (Y.R.), Kobe University Graduate School of Medicine, Kobe, Japan, Department of Experimental Pathology, Institute for Frontier Medical Science (N.S.), Kyoto University, Kyoto, Japan, and Hyogo Brain and Heart Center (M.Y.), Himegli, Japan
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19
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Abstract
A syndemic is defined as the convergence of two or more diseases that act synergistically to magnify the burden of disease. The intersection and syndemic interaction between the human immunodeficiency virus (HIV) and tuberculosis (TB) epidemics have had deadly consequences around the world. Without adequate control of the TB-HIV syndemic, the long-term TB elimination target set for 2050 will not be reached. There is an urgent need for additional resources and novel approaches for the diagnosis, treatment, and prevention of both HIV and TB. Moreover, multidisciplinary approaches that consider HIV and TB together, rather than as separate problems and diseases, will be necessary to prevent further worsening of the HIV-TB syndemic. This review examines current knowledge of the state and impact of the HIV-TB syndemic and reviews the epidemiological, clinical, cellular, and molecular interactions between HIV and TB.
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Hinks A, Martin P, Flynn E, Eyre S, Packham J, Barton A, Worthington J, Thomson W. Association of the CCR5 gene with juvenile idiopathic arthritis. Genes Immun 2010; 11:584-9. [PMID: 20463745 PMCID: PMC2974598 DOI: 10.1038/gene.2010.25] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2010] [Revised: 03/16/2010] [Accepted: 03/16/2010] [Indexed: 01/17/2023]
Abstract
The CC chemokine receptor 5 (CCR5) has been shown to be important in the recruitment of T-helper cells to the synovium, where they accumulate, drive the inflammatory process and the consequent synovitis and joint destruction. A 32 base-pair insertion/deletion variant (CCR5Δ32) within the gene leads to a frame shift and a nonfunctional receptor. CCR5Δ32 has been investigated for its association with juvenile idiopathic arthritis (JIA), with conflicting results. The aim of this study was to investigate whether CCR5Δ32 is associated with JIA in an UK population. CCR5Δ32 was genotyped in JIA cases (n=1054) and healthy controls (n=3129) and genotype and allele frequencies were compared. A meta-analysis of our study combined with previously published studies was performed. CCR5Δ32 was significantly associated with protection from developing JIA, in this UK data set (P(trend)=0.006, odds ratio (OR) 0.79 95% confidence interval (95% CI): 0.66-0.94). The meta-analysis of all published case-control association studies confirmed the protective association with JIA (P=0.001 OR 0.82 95% CI: 0.73-0.93). CCR5Δ32 is a functional variant determining the number of receptors on the surface of T cells, and it is hypothesized that the level of CCR5 expression could influence the migration of proinflammatory T cells into the synovium and thus susceptibility to JIA.
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Affiliation(s)
- A Hinks
- Manchester Academy of Health Sciences, The University of Manchester, UK.
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21
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Abstract
IMPORTANCE OF THE FIELD To date cancer immunotherapy has only achieved limited clinical efficacy, thus more efficient immunotherapeutic approaches need to be explored. The CC chemokine CCL5 plays a role in chemoattraction and activation of immune cells implying its potential clinical application as an adjuvant for boosting anti-tumor immunity, although an effect on carcinogenesis and tumor cell invasiveness is also reported to be associated with CCL5. AREAS COVERED IN THIS REVIEW Recent progress in exploiting CCL5 as an adjuvant for cancer prevention and treatment, and updated understanding on how CCL5 is involved in tumor invasiveness and carcinogenesis. WHAT THE READER WILL GAIN CCL5 represents a natural adjuvant for enhancing anti-tumor immune responses. However, animal experiments and clinical reports suggest that CCL5 plays a role in carcinogenesis and invasiveness of tumor cells. Therefore, a CCL5-based cancer therapeutic approach needs to avoid the CCL5-associated potential detrimental effects. TAKE HOME MESSAGE CCL5 has a pre-eminent role in chemotaxis and activation of a wide spectrum of immune cells. CCL5 functions as an adjuvant to boost anti-tumor immunity by diverse protocols such as co-immunization of recombinant CCL5 protein with tumor-associated antigen, vaccination with CCL-5-expressing tumor cells, or viral vector delivery of CCL5 cDNA into growing tumor. CCL5 may also promote tumor cell survival, proliferation and invasion by different mechanisms.
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Affiliation(s)
- Natalia Lapteva
- Department Molecular Microbiology & Immunology, 1450 Biggy Street, NRT 7506, Los Angeles, CA 90033, USA
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22
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Loftin LM, Kienzle MF, Yi Y, Lee B, Lee FH, Gray L, Gorry PR, Collman RG. Constrained use of CCR5 on CD4+ lymphocytes by R5X4 HIV-1: efficiency of Env-CCR5 interactions and low CCR5 expression determine a range of restricted CCR5-mediated entry. Virology 2010; 402:135-48. [PMID: 20381825 DOI: 10.1016/j.virol.2010.03.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2010] [Revised: 01/29/2010] [Accepted: 03/02/2010] [Indexed: 11/30/2022]
Abstract
R5X4 HIV-1 has impaired utilization of CCR5 on primary CD4+ lymphocytes but the mechanisms responsible are not well defined. Using a panel of diverse R5X4 Envs we identified a spectrum of CCR5 use on CD4+ lymphocytes. Greater lymphocyte CCR5 use correlated with relative resistance to CCR5 mAbs and small molecule antagonists. Increasing CCR5 expression on lymphocytes increased the proportion of entry mediated by CCR5 for all R5X4 isolates except 89.6. In cell lines with regulated CCR5 expression, strains with greater lymphocyte CCR5 use better exploited limiting levels of CCR5. Introduction of an R306S mutation in the 89.6 V3 domain enhanced its utilization of CCR5 at low levels and switched its preference to CCR5 for lymphocyte entry. Thus, the degree to which R5X4 HIV-1 use primary lymphocyte CCR5 is determined by low CCR5 expression coupled with variations in the efficiency of Env-CCR5 interactions, which is in part governed by V3 sequences.
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Affiliation(s)
- Lamorris M Loftin
- Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA
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23
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Al-Shanti N, Aldahoudi Z. Human Purified CD8+T Cells: Ex vivo Expansion Model to Generate a Maximum Yield of Functional Cytotoxic Cells. Immunol Invest 2009; 36:85-104. [PMID: 17190652 DOI: 10.1080/08820130600991950] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
CD8+ T cells are a critical component of the cellular immune response. They play an important role in the control of viral infection and eliminating cells with malignant potential. However, attempts to generate and expand human CD8+ T cells in vitro for an adoptive immunotherapy have been conducted with limitation of the very low frequency of CD8+ T cells in blood. Therefore, several expansion protocols have been developed to obtain large and efficient numbers of human CD8+ T cells for use in adoptive immunotherapies. In this study various common culture conditions using different cytokines IL-2, IL-4, IL-7, IL-10, IL-12 and IL-15 and autologous feeders and sera were investigated to expand human purified CD8+ T cells. The importance and the influence of these factors on the growth and phenotype of CD8+ T cell were assessed by serially sampling cultures using flow cytometry. We demonstrated that combination of IL-2 (50 U/ml) and autologous feeders induced maximal CD8+ T cell proliferation (40-50 folds) compared to other cytokines. Immunophenotypic analysis of cultured cells showed that expanded CD8+ T cells were activated and differentiated. Furthermore our expansion model also demonstrated that expanded CD8+ T cells are functionally cytotoxic active by killing Allogeneic LCLs cells. In conclusion, we have developed a reliable, simple method that uses minimal cell numbers to generate a high yield of functional cytotoxic CD8+ T cells, which can be used for the development of cellular immunotherapies.
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Affiliation(s)
- Nasser Al-Shanti
- Institute for Clinical Research into Human Movement, Manchester Metropolitan University, Hassall Road, Alsager, Stoke-on-Trent, England.
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24
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GBV-C viremia is associated with reduced CD4 expansion in HIV-infected people receiving HAART and interleukin-2 therapy. AIDS 2009; 23:605-10. [PMID: 19194270 DOI: 10.1097/qad.0b013e32831f1b00] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
OBJECTIVE Interleukin-2 (IL-2) is a cytokine with multiple effects on lymphocytes including induction of CD4 T-cell proliferation. IL-2 administration has been shown to increase CD4 cell counts in HIV-infected people receiving antiretroviral therapy. GB virus C (GBV-C) is an apparently nonpathogenic flavivirus that replicates in CD4 T cells and inhibits HIV replication in vitro by mechanisms including downregulation of HIV entry coreceptors (CCR5 and CXCR4) and induction of chemokines (RANTES, MIP-1alpha, MIP-1 beta, and SDF-1). GBV-C replication is significantly inhibited in vitro by activation of primary CD4 cell cultures with IL-2 and phytohemagglutinin. We sought to determine if there is an interaction between GBV-C and IL-2 in vivo. METHODS GBV-C viremia status was characterized in 92 HIV-infected individuals participating in a randomized trial of IL-2 and antiretroviral therapy [AIDS Clinical Trials Group Study (ACTG) 328]. Changes in CD4 cell counts and HIV RNA levels in individuals assigned IL-2 were compared with those in individuals assigned antiretroviral therapy alone. RESULTS Individuals lacking GBV-C viremia had a significantly greater rise in CD4 cell count with IL-2, compared with GBV-C viremic individuals (by 511 cells/microl at week 84; interaction P = 0.02): GBV-C viremic individuals assigned IL-2 did not demonstrate a significant increase in CD4 cell count compared with individuals not assigned to receive IL-2 (95% CI for difference -255 to 397 cells/microl). CONCLUSION GBV-C viremia was associated with a block in CD4 cell expansion following IL-2 therapy in the ACTG 328 study, and GBV-C status may be an important factor in IL-2 treatment response.
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25
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Camargo JF, Quinones MP, Mummidi S, Srinivas S, Gaitan AA, Begum K, Jimenez F, VanCompernolle S, Unutmaz D, Ahuja SS, Ahuja SK. CCR5 expression levels influence NFAT translocation, IL-2 production, and subsequent signaling events during T lymphocyte activation. THE JOURNAL OF IMMUNOLOGY 2009; 182:171-82. [PMID: 19109148 DOI: 10.4049/jimmunol.182.1.171] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Ligands of CCR5, the major coreceptor of HIV-1, costimulate T lymphocyte activation. However, the full impact of CCR5 expression on T cell responses remains unknown. Here, we show that compared with CCR5(+/+), T cells from CCR5(-/-) mice secrete lower amounts of IL-2, and a similar phenotype is observed in humans who lack CCR5 expression (CCR5-Delta32/Delta32 homozygotes) as well as after Ab-mediated blockade of CCR5 in human T cells genetically intact for CCR5 expression. Conversely, overexpression of CCR5 in human T cells results in enhanced IL-2 production. CCR5 surface levels correlate positively with IL-2 protein and mRNA abundance, suggesting that CCR5 affects IL-2 gene regulation. Signaling via CCR5 resulted in NFAT transactivation in T cells that was blocked by Abs against CCR5 agonists, suggesting a link between CCR5 and downstream pathways that influence IL-2 expression. Furthermore, murine T cells lacking CCR5 had reduced levels of intranuclear NFAT following activation. Accordingly, CCR5 expression also promoted IL-2-dependent events, including CD25 expression, STAT5 phosphorylation, and T cell proliferation. We therefore suggest that by influencing a NFAT-mediated pathway that regulates IL-2 production and IL-2-dependent events, CCR5 may play a critical role in T cell responses. In accord with our prior inferences from genetic-epidemiologic studies, such CCR5-dependent responses might constitute a viral entry-independent mechanism by which CCR5 may influence HIV-AIDS pathogenesis.
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Affiliation(s)
- Jose F Camargo
- Veterans Administration Research Center for AIDS and HIV-1 Infection, South Texas Veterans Health Care System, San Antonio, TX 78229, USA
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26
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Gene expression profiling of peripheral mononuclear cells in lame dairy cows with foot lesions. Vet Immunol Immunopathol 2007; 120:234-45. [PMID: 17675248 DOI: 10.1016/j.vetimm.2007.06.028] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2007] [Revised: 06/11/2007] [Accepted: 06/20/2007] [Indexed: 01/03/2023]
Abstract
Lameness is a major health issue and likely the single most common cause of pain and discomfort in dairy cattle. Appropriate treatment is delayed or neglected due, in part, to lack of reliable detection. Assessment of cows with lameness is currently limited to subjective visual scoring systems based on locomotion and posture abnormalities. These systems are unreliable to detect lameness, and therefore, a large number of cows remain undiagnosed. The objective of this research was to search for potential biomarkers for lameness-associated painful inflammatory foot lesions in dairy cattle using microarray-based gene expression profiling of peripheral blood mononuclear cells (PBMC). BOTL5 microarrays spotted in duplicate with cDNA representing bovine immune response genes were interrogated with cDNA samples in an eight-array, balanced complete block design with dye swap. Samples from eight lame cows with inflammatory foot lesions and from eight sound cows were pair-matched by age, weight, days in lactation, and pregnancy status at time of PBMC collection and directly compared with each other on individual arrays. Statistical analysis of resulting fluorescence intensity data revealed 31 genes that were putatively differentially expressed in lame versus sound cows (P<0.05). Of these, BLASTn analysis and gene ontology information showed that 28 genes had high similarity or homology to known human and/or rodent genes. Validation of 15 of these genes known to be important in inflammation and pain was carried out using relative quantitative real-time RT-PCR, which confirmed the up-regulation of interleukin (IL)-2 (12.68+/-1.47-fold increase) and IL-10 (2.39+/-0.55-fold increase), matrix metalloproteinase-13 (MMP-13) (10.44+/-1.14-fold increase), and chemokine C-C motif receptor-5 (CCR5) (5.26+/-1.05-fold increase), in lame relative to sound cows (P< or =0.05). Similarly, granulocyte-macrophage colony-stimulating factor receptor alpha chain precursor (GM-CSF-R-alpha) (2.30+/-0.63-fold increase) and IL-4 (2.06+/-0.59-fold increase) showed a tendency (P=0.10) for up-regulation in lame compared to sound cows. PBMC co-expression of IL-2, MMP-13, CCR5 and IL-10, and potentially IL-4 and GM-CSF-R-alpha appears to be a promising, objective sign of lameness-related inflammatory foot lesions in dairy cattle. In conclusion, this study revealed potential biomarkers of the presence of foot lesions that could boost diagnostic accuracy of lameness and, ultimately, help identify animals in need of pain relief.
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27
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Mummidi S, Adams LM, VanCompernolle SE, Kalkonde M, Camargo JF, Kulkarni H, Bellinger AS, Bonello G, Tagoh H, Ahuja SS, Unutmaz D, Ahuja SK. Production of specific mRNA transcripts, usage of an alternate promoter, and octamer-binding transcription factors influence the surface expression levels of the HIV coreceptor CCR5 on primary T cells. THE JOURNAL OF IMMUNOLOGY 2007; 178:5668-81. [PMID: 17442950 DOI: 10.4049/jimmunol.178.9.5668] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Surface levels of CCR5 on memory CD4(+) T cells influence HIV-1/AIDS susceptibility. Alternative promoter usage results in the generation of CCR5 mRNA isoforms that differ based on whether they contain or lack the untranslated exon 1. The impact of exon 1-containing transcripts on CCR5 surface expression is unknown. In this study, we show that the increased cell surface expression of CCR5 on primary T cells is associated with selective enrichment of exon 1-containing transcripts. The promoter that drives exon 1-containing transcripts is highly active in primary human T cells but not in transformed T cell lines. The transcription factors Oct-1 and -2 inhibit and enhance, respectively, the expression of exon 1-containing transcripts and CCR5 surface levels. However, polymorphisms at homologous octamer-binding sites in the CCR5 promoter of nonhuman primates abrogate the binding of these transcription factors. These results identify exon 1-containing transcripts, and the cis-trans factors that regulate the expression levels of these mRNA isoforms as key parameters that affect CCR5 surface expression levels, and by extension, susceptibility to HIV/AIDS among humans, and possibly, the observed interspecies differences in susceptibility to lentiviral infection.
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Affiliation(s)
- Srinivas Mummidi
- Veterans Administration Center for AIDS and HIV Infection, South Texas Veterans Healthcare System and Department of Medicine, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
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28
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Zhang X, Niessner A, Nakajima T, Ma-Krupa W, Kopecky SL, Frye RL, Goronzy JJ, Weyand CM. Interleukin 12 induces T-cell recruitment into the atherosclerotic plaque. Circ Res 2006; 98:524-31. [PMID: 16424368 DOI: 10.1161/01.res.0000204452.46568.57] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
CD4 T cells, through the release of cytokines as well as direct effector functions, have been implicated in promoting inflammation of the atherosclerotic plaque. Plaque-infiltrating CD4 T cells include a specialized subset of (CD4+)CD28- T cells that express a unique profile of regulatory receptors and are responsive to novel microenvironmental cues. Here we report that (CD4+)CD28- T cells, either isolated from the plaque tissue or from the blood of patients with acute coronary syndrome (ACS), spontaneously express interleukin (IL)-12 receptors, even in the absence of antigenic stimulation. (CD4+)CD28- IL-12R+ cells responded to IL-12 stimulation with the upregulation of the chemokine receptor CCR5 and the C-type lectin receptor CD161, both implicated in regulating tissue homing of effector T cells. IL-12 treatment of (CD4+)CD28- T cells enhanced their chemotaxis and transendothelial migration toward the chemokine CCL5. In vivo relevance for the role of IL-12 in regulating the recruitment of (CD4+)CD28- T cells into the atheroma was examined in human atheroma-SCID mouse chimeras. Exposure of nonstimulated (CD4+)CD28- T cells to IL-12 was sufficient to amplify T-cell accumulation within the inflamed plaque, and coadministration of anti-CCR5 antibodies blocked T-cell recruitment into the plaque. Thus, (CD4+)CD28- T cells functionally resemble NK cells, which have proinflammatory activity even in the unprimed state and respond to any IL-12-inducing host infection with a shift in tissue trafficking and accrual in inflammatory lesions.
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Affiliation(s)
- Xiaoyu Zhang
- Department of Medicine, Kathleen B. and Mason I. Lowance Center for Human Immunology, Emory University School of Medicine, Atlanta, GA, USA
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29
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Alfano M, Poli G. Role of cytokines and chemokines in the regulation of innate immunity and HIV infection. Mol Immunol 2005; 42:161-82. [PMID: 15488606 DOI: 10.1016/j.molimm.2004.06.016] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The earliest defense against microbial infection is represented by the responses of the innate (or natural) immune system, that also profoundly regulates the adaptive (or acquired) T- and B-cell immune responses. Activation of the innate immune system is primed by microbial invasion in response to conserved structures present in large groups of microorganisms (LPS, peptidoglycan, double-stranded RNA), and is finely tuned by different cell types (including dendritic cells, macrophages, natural killer cells, natural killer T cells, and gammadelta T cells). In addition, several soluble factors (complement components, defensins, mannose-binding lectins, interferons, cytokines and chemokines) can play a major role in the regulation of both the innate and adaptive immunity. In this review, we will briefly overview the regulation of some cellular subsets of the innate immune system particularly involved in human immunodeficiency virus (HIV) infection and then focus our attention on those cytokines and chemokines whose levels of expression are more profoundly affected by HIV infection and that, conversely, can modulate virus infection and replication.
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Affiliation(s)
- Massimo Alfano
- AIDS Immunopathogenesis Unit, San Raffaele Scientific Institute, P2-P3 Laboratories, DIBIT, Via Olgettina no. 58, 20132 Milano, Italy
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30
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Shacklett BL, Cox CA, Sandberg JK, Stollman NH, Jacobson MA, Nixon DF. Trafficking of human immunodeficiency virus type 1-specific CD8+ T cells to gut-associated lymphoid tissue during chronic infection. J Virol 2003; 77:5621-31. [PMID: 12719554 PMCID: PMC154016 DOI: 10.1128/jvi.77.10.5621-5631.2003] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Gut-associated lymphoid tissue (GALT) is a significant but understudied lymphoid organ, harboring a majority of the body's total lymphocyte population. GALT is also an important portal of entry for human immunodeficiency virus (HIV), a major site of viral replication and CD4(+) T-cell depletion, and a frequent site of AIDS-related opportunistic infections and neoplasms. However, little is known about HIV-specific cell-mediated immune responses in GALT. Using lymphocytes isolated from rectal biopsies, we have determined the frequency and phenotype of HIV-specific CD8(+) T cells in human GALT. GALT CD8(+) T cells were predominantly CD45RO(+) and expressed CXCR4 and CCR5. In 10 clinically stable, chronically infected individuals, the frequency of HIV Gag (SL9)-specific CD8(+) T cells was increased in GALT relative to peripheral blood mononuclear cells by up to 4.6-fold, while that of cytomegalovirus (CMV)-specific CD8(+) T cells was significantly reduced (P = 0.012). Both HIV- and CMV-specific CD8(+) T cells in GALT expressed CCR5, but only HIV-specific CD8(+) T cells expressed alpha E beta 7 integrin, suggesting that mucosal priming may account for their retention in GALT. Chronically infected individuals exhibited striking depletion of GALT CD4(+) T cells expressing CXCR4, CCR5, and alpha E beta 7 integrin, but CD4(+)/CD8(+) T-cell ratios in blood and GALT were similar. The percentage of GALT CD8(+) T cells expressing alpha E beta 7 was significantly decreased in infected individuals, suggesting that HIV infection may perturb lymphocyte retention in GALT. These studies demonstrate the feasibility of using tetramers to assess HIV-specific T cells in GALT and reveal that GALT is the site of an active CD8(+) T-cell response during chronic infection.
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Affiliation(s)
- Barbara L Shacklett
- Gladstone Institute of Virology and Immunology, University of California, San Francisco, California 94141-9100, USA.
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31
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Abstract
An effective inflammatory immune response first requires the recruitment of cells to the site of inflammation and then their appropriate activation and regulation. Chemokines are critical in this response since they are both chemotactic and immunoregulatory molecules. In this regard, the interaction between CCL5 and CCR5 may be critical in regulating T cell functions, by mediating their recruitment and polarization, activation, and differentiation. Various tyrosine phosphorylation signaling cascades can be engaged following chemokine receptor aggregation on T cells, including the Jak-Stat pathway, FAK activation, the MAP kinase pathway, PI3-kinase activation, and transactivation of the T cell receptor. This review will address specific aspects related to chemokine-T cell interactions and the molecular signaling mechanisms that influence T cell function in an inflammatory immune response.
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Affiliation(s)
- Mark M Wong
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada M5S 1A8
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32
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Rodríguez-Sosa M, Satoskar AR, Calderón R, Gomez-Garcia L, Saavedra R, Bojalil R, Terrazas LI. Chronic helminth infection induces alternatively activated macrophages expressing high levels of CCR5 with low interleukin-12 production and Th2-biasing ability. Infect Immun 2002; 70:3656-64. [PMID: 12065507 PMCID: PMC128095 DOI: 10.1128/iai.70.7.3656-3664.2002] [Citation(s) in RCA: 110] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Helminth infections induce Th2-type biased immune responses. Although the mechanisms involved in this phenomenon are not yet clearly defined, antigen-presenting cells (APC) could play an important role in this process. Here, we have used peritoneal macrophages (F4/80+) recruited at different times after challenge with Taenia crassiceps as APC and tested their ability to regulate Th1/Th2 differentiation. Macrophages from acute infections produced high levels of interleukin-12 (IL-12) and nitric oxide (NO), paralleled with low levels of IL-6 and prostaglandin E(2) (PGE(2)) and with the ability to induce strong antigen-specific CD4+ T-cell proliferation in response to nonrelated antigens. In contrast, macrophages from chronic infections produced higher levels of IL-6 and PGE(2) and had suppressed production of IL-12 and NO, associated with a poor ability to induce antigen-specific proliferation in CD4+ T cells. Failure to induce proliferation was not due to a deficient expression of accessory molecules, since major histocompatibility complex class II, CD40, and B7-2 were up-regulated, together with CD23 and CCR5 as infection progressed. These macrophages from chronic infections were able to bias CD4+ T cells to produce IL-4 but not gamma interferon (IFN-gamma), contrary to macrophages from acute infections. Blockade of B7-2 and IL-6 and inhibition of PGE(2) failed to restore the proliferative response in CD4+ T cells. Furthermore, studies using STAT6(-/-) mice revealed that STAT6-mediated signaling was essential for the expansion of these alternatively activated macrophages. These data demonstrate that helminth infections can induce different macrophage populations that have Th2-biasing properties.
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Affiliation(s)
- Miriam Rodríguez-Sosa
- Department of Immunology, Instituto Nacional de Cardiologia Ignacio Chavez, D.F. Mexico 14080, Mexico
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33
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Glatzel A, Wesch D, Schiemann F, Brandt E, Janssen O, Kabelitz D. Patterns of chemokine receptor expression on peripheral blood gamma delta T lymphocytes: strong expression of CCR5 is a selective feature of V delta 2/V gamma 9 gamma delta T cells. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2002; 168:4920-9. [PMID: 11994442 DOI: 10.4049/jimmunol.168.10.4920] [Citation(s) in RCA: 120] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Gammadelta T lymphocytes play an important role in the immune defense against infection, based on the unique reactivity of human Vdelta2Vgamma9 gammadelta T cells toward bacterial phosphoantigens. Chemokines and their corresponding receptors orchestrate numerous cellular reactions, including leukocyte migration, activation, and degranulation. In this study we investigated the expression of various receptors for inflammatory and homeostatic chemokines on peripheral blood gammadelta T cells and compared their expression patterns with those on alphabeta T cells. Although several of the analyzed receptors (including CCR6, CCR7, CXCR4, and CXCR5) were not differentially expressed on gammadelta vs alphabeta T cells, gammadelta T cells expressed strongly increased levels of the RANTES/macrophage inflammatory protein-1alpha/-1beta receptor CCR5 and also enhanced levels of CCR1-3 and CXCR1-3. CCR5 expression was restricted to Vdelta2 gammadelta T cells, while the minor subset of Vdelta1 gammadelta T cells preferentially expressed CXCR1. Stimulation with heat-killed extracts of Mycobacterium tuberculosis down-modulated cell surface expression of CCR5 on gammadelta T cells in a macrophage-dependent manner, while synthetic phosphoantigen isopentenyl pyrophosphate and CCR5 ligands directly triggered CCR5 down-modulation on gammadelta T cells. The functionality of chemokine receptors CCR5 and CXCR3 on gammadelta T cells was demonstrated by Ca(2+) mobilization and chemotactic response to the respective chemokines. Our results identify high level expression of CCR5 as a characteristic and selective feature of circulating Vdelta2 gammadelta T cells, which is in line with their suspected function as Th1 effector T cells.
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MESH Headings
- Adult
- Cells, Cultured
- Chemokines, CC/blood
- Chemokines, CXC/blood
- Clone Cells/metabolism
- Humans
- Lymphocyte Activation
- Receptors, Antigen, T-Cell, alpha-beta/blood
- Receptors, Antigen, T-Cell, gamma-delta/blood
- Receptors, CCR5/biosynthesis
- Receptors, CCR5/blood
- Receptors, CCR5/physiology
- Receptors, CCR7
- Receptors, CXCR3
- Receptors, CXCR4/biosynthesis
- Receptors, CXCR4/blood
- Receptors, Chemokine/biosynthesis
- Receptors, Chemokine/blood
- Receptors, Chemokine/physiology
- T-Lymphocyte Subsets/immunology
- T-Lymphocyte Subsets/metabolism
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Affiliation(s)
- Andrea Glatzel
- Institute of Immunology, University of Kiel, Michaelisstrasse 5, D-24105 Kiel, Germany
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Shadidi KR, Thompson KM, Henriksen JE, Natvig JB, Aarvak T. Association of antigen specificity and migratory capacity of memory T cells in rheumatoid arthritis. Scand J Immunol 2002; 55:274-83. [PMID: 11940234 DOI: 10.1046/j.0300-9475.2002.01036.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Among the T cell pool of multiple specificities in the rheumatoid synovial tissues (ST) we have previously shown a lack of proliferative response of T cells to Acanthamoeba polyphaga [1]. In contrast, peripheral blood (PB) derived T cells proliferate to the antigen. The aim of the present study was to establish whether there is a preferential migration of some T cell specificities to the joint in rheumatoid arthritis (RA) patients dependent on the chemokine system, and to identify which chemokine receptors are involved in the migratory process. For this purpose, PB-derived T cell lines and clones from RA patients specific for A. polyphaga, herpes simplex virus (HSV) and Campylobacter jejuni were developed. Their migratory capacities towards ST-derived chemokine supernatants were analysed. Expression of CCR1, CCR2, CCR5, CCR6, CCR7, CXCR3 and CXCR4 were analysed by FACS, and attracting chemokines were identified by blocking studies. We found that the migratory capacities of T cells specific for C. jejuni and HSV were markedly higher against synovial chemokines than T cells specific for A. polyphaga. CCR5 and CXCR3 were expressed by all high-migrating T cell lines and clones. CCR2 was expressed at higher levels on the high-migrating T cell lines compared with the low-migrating A. polyphaga lines. Neutralization of RANTES (regulated upon activation normal T cell expressed and secreted) in the ST cell-derived supernatant reduced T cell migration of all T cell lines and clones by 60-90%, while neutralization of MCP-1 reduced the migratory capacity of CCR2-expressing T cells by 45-80%. In conclusion, the ability of T cells to migrate towards chemokines produced by ST cells is associated with the T cell specificity. Blocking of single chemokines substantially reduced the migratory capacity of memory T cells to ST cell-derived supernatant indicating unique roles for each chemokine receptor in the process of T cell migration.
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Affiliation(s)
- K R Shadidi
- Rikshospitalet University Hospital, Institute of Immunology, Department of Rheumatology Research, Oslo, Norway.
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Ebert LM, McColl SR. Up-regulation of CCR5 and CCR6 on distinct subpopulations of antigen-activated CD4+ T lymphocytes. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2002; 168:65-72. [PMID: 11751947 DOI: 10.4049/jimmunol.168.1.65] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Following infection, naive T cells are activated in the secondary lymphoid tissue, but then need to move to the infected tissue in the periphery to mediate their effector functions. The acquisition of inflammatory chemokine receptors, such as CCR5 and CCR6, may contribute to the efficient relocation of activated T cells to inflamed sites in the periphery. In keeping with this idea, the present study has demonstrated that CCR5 and CCR6 are up-regulated on CD4+ T cells upon activation in the MLR. The observed increase in expression correlated well with the acquisition of an activated/memory phenotype and was largely (CCR5) or completely (CCR6) separated temporally from the initiation of cell division. In contrast, the regulation of two other chemokine receptors, CXCR3 and CXCR4, occurred in close parallel with the cell division process. Increased mRNA levels are likely to contribute to the enhanced surface expression of CCR5 and CCR6, but in the case of CCR6, translocation of intracellular stores of protein to the cell surface may be an additional mechanism of regulation. The up-regulation of CCR5 was more extensive than that of CCR6, as only approximately half the activated CCR5+ T cells coexpressed CCR6. The increased expression of CCR5 resulted in enhanced chemotaxis toward the CCR5 ligand macrophage-inflammatory protein-1beta/CCL4, but up-regulation of CCR6 did not result in altered chemotactic responsiveness to macrophage-inflammatory protein-3alpha/CCL20, suggesting an alternative function for this receptor.
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MESH Headings
- CD4-Positive T-Lymphocytes/immunology
- Cells, Cultured
- Chemotaxis, Leukocyte
- Humans
- Immunologic Memory
- Immunophenotyping
- Isoantigens/immunology
- Kinetics
- Lymphocyte Activation
- Lymphocyte Culture Test, Mixed
- RNA, Messenger/biosynthesis
- Receptors, CCR5/biosynthesis
- Receptors, CCR5/genetics
- Receptors, CCR6
- Receptors, CXCR3
- Receptors, CXCR4/biosynthesis
- Receptors, Chemokine/biosynthesis
- Receptors, Chemokine/genetics
- T-Lymphocyte Subsets/classification
- T-Lymphocyte Subsets/immunology
- Transcriptional Activation
- Up-Regulation
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Affiliation(s)
- Lisa M Ebert
- Chemokine Biology Laboratory, Department of Molecular Biosciences, Adelaide University, Adelaide 5005, Australia
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36
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Iwasaki M, Mukai T, Nakajima C, Yang YF, Gao P, Yamaguchi N, Tomura M, Fujiwara H, Hamaoka T. A mandatory role for STAT4 in IL-12 induction of mouse T cell CCR5. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2001; 167:6877-83. [PMID: 11739505 DOI: 10.4049/jimmunol.167.12.6877] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
IL-12 was recently shown to induce CCR5 on TCR-triggered mouse T cells. Considering that STAT4 is the most critical of IL-12 signaling molecules, this study investigated the role for STAT4 in the induction of CCR5 expression. IL-12R was induced by stimulation with anti-CD3 plus anti-CD28 mAb similarly on T cells from wild-type (WT) and STAT4-deficient (STAT4(-/-)) mice, but the levels of IL-12R induced on IFN-gamma-deficient (IFN-gamma(-/-)) T cells were lower compared with WT T cells. Exposure of TCR-triggered WT T cells to IL-12 induced CCR5 expression. In contrast, TCR-triggered STAT4(-/-) T cells failed to express CCR5 in response to IL-12. IL-12 stimulation induced detectable albeit reduced levels of CCR5 expression on IFN-gamma(-/-) T cells. Addition of rIFN-gamma to cultures of IFN-gamma(-/-) T cells, particularly to cultures during TCR triggering resulted in restoration of CCR5 expression. However, CCR5 expression was not induced in STAT4(-/-) T cells by supplementation of rIFN-gamma. These results indicate that for the induction of CCR5 on T cells, 1) STAT4 plays an indispensable role; 2) such a role is not substituted by simply supplementing rIFN-gamma; and 3) IFN-gamma amplifies CCR5 induction depending on the presence of STAT4.
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MESH Headings
- Animals
- Cells, Cultured
- DNA-Binding Proteins/genetics
- DNA-Binding Proteins/physiology
- Flow Cytometry
- Humans
- Interferon-gamma/genetics
- Interferon-gamma/pharmacology
- Interleukin-12/pharmacology
- Lymphocyte Activation
- Mice
- Mice, Inbred BALB C
- Mice, Knockout
- RNA, Messenger/biosynthesis
- Receptors, Antigen, T-Cell/metabolism
- Receptors, CCR5/biosynthesis
- Receptors, CCR5/genetics
- Receptors, Interleukin/biosynthesis
- Receptors, Interleukin/genetics
- Receptors, Interleukin-12
- STAT4 Transcription Factor
- Signal Transduction
- T-Lymphocytes/drug effects
- T-Lymphocytes/immunology
- Trans-Activators/genetics
- Trans-Activators/physiology
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Affiliation(s)
- M Iwasaki
- Department of Oncology (C6), Osaka University Graduate School of Medicine, Osaka, Japan
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Yang YF, Tomura M, Iwasaki M, Ono S, Zou JP, Uno K, Shearer GM, Fujiwara H, Hamaoka T. IFN-alpha acts on T-cell receptor-triggered human peripheral leukocytes to up-regulate CCR5 expression on CD4+ and CD8+ T cells. J Clin Immunol 2001; 21:402-9. [PMID: 11811785 DOI: 10.1023/a:1013173610032] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Interleukin-12 (IL-12) as well as IL-2 was recently shown to up-regulate CCR5 expression on T-cell receptor (TCR)-triggered human T cells. Because of the functional similarity between interferon-alpha (IFN-alpha) and IL-12, the present study investigated whether IFN-alpha also up-regulates T cell CCR5 expression. CCR5 was marginally detected on T cells from unstimulated human peripheral blood leukocytes (PBLs) and only slightly induced on PBL T cells following stimulation with anti-CD3 plus anti-CD28 monoclonal antibodies (mAbs). When anti-CD3/anti-CD28-triggered PBLs were exposed to IFN-alpha, T cells expressed high levels of CCR5. The levels of CCR5 expression were comparable to those induced by IL-12. However, when purified T cells instead of unfractionated PBL were stimulated with anti-CD3/CD28 and then exposed to IL-12 or IFN-alpha, CCR5 expression was induced by IL-12 but not by IFN-alpha. IFN-alpha was found to act on anti-CD3/anti-CD28-stimulated PBL to promote their IL-12 production. Moreover, addition of anti-IL-12 mAb to IFN-alpha-stimulated cultures of anti-CD3/CD28-pretreated PBL resulted in considerable inhibition of CCR5 expression. Together, these results indicate that IFN-alpha as well as IL-12 up-regulates CCR5 expression on TCR-triggered T cells and that IFN-alpha functions not by acting directly on T cells but via enhancing IL-12 production by PBL.
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Affiliation(s)
- Y F Yang
- Department of Oncology, Biomedical Research Center, Osaka University Graduate School of Medicine, Japan
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Iwasaki M, Mukai T, Gao P, Park WR, Nakajima C, Tomura M, Fujiwara H, Hamaoka T. A critical role for IL-12 in CCR5 induction on T cell receptor-triggered mouse CD4(+) and CD8(+) T cells. Eur J Immunol 2001; 31:2411-20. [PMID: 11500825 DOI: 10.1002/1521-4141(200108)31:8<2411::aid-immu2411>3.0.co;2-y] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Despite increasing evidence for the role of the chemokine system in leukocyte trafficking, the mechanism underlying the induction of chemokine receptors is poorly understood. Here, we investigated how CCR5, a chemokine receptor implicated in T cell migration to inflammatory sites, is induced in the T cell. CCR5 mRNA was hardly detected in resting T cells and marginally induced following T cell receptor (TCR) stimulation. However, TCR-triggered T cells expressed IL-12 receptor, and stimulation with recombinant IL-12 resulted in high levels of CCR5 expression on both CD4(+) and CD8(+) T cells. In contrast, IL-2 failed to up-regulate CCR5 expression. The effect of IL-12 was selective to CCR5 because IL-12 did not up-regulate CXCR3 expression. Surface expression of CCR5 was shown by staining with anti-CCR5 monoclonal antibody. Stimulation of these CCR5-positive T cells with the relevant chemokine MIP-1 alpha elicited Ca(2+) influx, showing that IL-12-induced CCR5 is functional. These results indicate a critical role for IL-12 in the induction of CCR5 on TCR-triggered T cells.
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Affiliation(s)
- M Iwasaki
- Department of Oncology, Biomedical Research Center, Osaka University Graduate School of Medicine, Osaka, Japan
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