1
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Larson EC, Ellis AL, Rodgers MA, Gubernat AK, Gleim JL, Moriarty RV, Balgeman AJ, de Menezes YT, Ameel CL, Fillmore DJ, Pergalske SM, Juno JA, Maiello P, Chishti HB, Lin PL, Godfrey DI, Kent SJ, Pellicci DG, Ndhlovu LC, O’Connor SL, Scanga CA. Transiently boosting Vγ9+Vδ2+ γδ T cells early in Mtb coinfection of SIV-infected juvenile macaques does not improve Mtb host resistance. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.07.22.604654. [PMID: 39091843 PMCID: PMC11291075 DOI: 10.1101/2024.07.22.604654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 08/04/2024]
Abstract
Children living with HIV have a higher risk of developing tuberculosis (TB), a disease caused by the bacterium Mycobacterium tuberculosis (Mtb). Gamma delta (γδ) T cells in the context of HIV/Mtb coinfection have been understudied in children, despite in vitro evidence suggesting γδ T cells assist with Mtb control. We investigated whether boosting a specific subset of γδ T cells, phosphoantigen-reactive Vγ9+Vδ2+ cells, could improve TB outcome using a nonhuman primate model of pediatric HIV/Mtb coinfection. Juvenile Mauritian cynomolgus macaques (MCM), equivalent to 4-8-year-old children, were infected intravenously (i.v.) with SIV. After 6 months, MCM were coinfected with a low dose of Mtb and then randomized to receive zoledronate (ZOL), a drug that increases phosphoantigen levels, (n=5; i.v.) at 3- and 17- days after Mtb accompanied by recombinant human IL-2 (s.c.) for 5 days following each ZOL injection. A similarly coinfected MCM group (n=5) was injected with saline as a control. Vγ9+Vδ2+ γδ T cell frequencies spiked in the blood, but not airways, of ZOL+IL-2-treated MCM following the first dose, however, were refractory to the second dose. At necropsy eight weeks after Mtb, ZOL+IL-2 treatment did not reduce pathology or bacterial burden. γδ T cell subset frequencies in granulomas did not differ between treatment groups. These data show that transiently boosting peripheral γδ T cells with ZOL+IL-2 soon after Mtb coinfection of SIV-infected MCM did not improve Mtb host defense.
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Affiliation(s)
- Erica C. Larson
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Center for Vaccine Research, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Amy L. Ellis
- Department of Pathology and Laboratory Medicine, University of Wisconsin - Madison, Wisconsin, USA
| | - Mark A. Rodgers
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Abigail K. Gubernat
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Janelle L. Gleim
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Ryan V. Moriarty
- Department of Pathology and Laboratory Medicine, University of Wisconsin - Madison, Wisconsin, USA
| | - Alexis J. Balgeman
- Department of Pathology and Laboratory Medicine, University of Wisconsin - Madison, Wisconsin, USA
| | - Yonne T. de Menezes
- Department of Immunobiology, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Cassaundra L. Ameel
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Daniel J. Fillmore
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Skyler M. Pergalske
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Jennifer A. Juno
- Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, VIC, Australia
| | - Pauline Maiello
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Harris B. Chishti
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Philana Ling Lin
- Department of Pediatrics, UPMC’s Children’s Hospital of the University of Pittsburgh of UPMC, Pittsburgh, PA
| | - Dale I. Godfrey
- Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, VIC, Australia
| | - Stephen J. Kent
- Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, VIC, Australia
- Melbourne Sexual Health Centre and Department of Infectious Diseases, Alfred Hospital and Centre Clinical School, Monash University, Melbourne, VIC, Australia
| | - Daniel G. Pellicci
- Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, VIC, Australia
- Department of Paediatrics, University of Melbourne, Melbourne, VIC, Australia
| | - Lishomwa C. Ndhlovu
- Department of Medicine, Division of Infectious Disease, Weill Cornell Medicine, New York, New York, USA
| | - Shelby L. O’Connor
- Department of Pathology and Laboratory Medicine, University of Wisconsin - Madison, Wisconsin, USA
- Wisconsin National Primate Research Center, University of Wisconsin - Madison, Wisconsin, USA
| | - Charles A. Scanga
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Center for Vaccine Research, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
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2
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Carlson SL, Mathew L, Savage M, Kok K, Lindsay JO, Munro CA, McCarthy NE. Mucosal Immunity to Gut Fungi in Health and Inflammatory Bowel Disease. J Fungi (Basel) 2023; 9:1105. [PMID: 37998910 PMCID: PMC10672531 DOI: 10.3390/jof9111105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 11/09/2023] [Accepted: 11/12/2023] [Indexed: 11/25/2023] Open
Abstract
The gut microbiome is a diverse microbial community composed of bacteria, viruses, and fungi that plays a major role in human health and disease. Dysregulation of these gut organisms in a genetically susceptible host is fundamental to the pathogenesis of inflammatory bowel disease (IBD). While bacterial dysbiosis has been a predominant focus of research for many years, there is growing recognition that fungal interactions with the host immune system are an important driver of gut inflammation. Candida albicans is likely the most studied fungus in the context of IBD, being a near universal gut commensal in humans and also a major barrier-invasive pathogen. There is emerging evidence that intra-strain variation in C. albicans virulence factors exerts a critical influence on IBD pathophysiology. In this review, we describe the immunological impacts of variations in C. lbicans colonisation, morphology, genetics, and proteomics in IBD, as well as the clinical and therapeutic implications.
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Affiliation(s)
- Sean L. Carlson
- Centre for Immunobiology, The Blizard Institute, Queen Mary University of London, London E1 2AT, UK
- Gastroenterology Department, Royal London Hospital, Barts Health NHS Trust, London E1 1BB, UK
| | - Liya Mathew
- Centre for Immunobiology, The Blizard Institute, Queen Mary University of London, London E1 2AT, UK
| | - Michael Savage
- Centre for Immunobiology, The Blizard Institute, Queen Mary University of London, London E1 2AT, UK
| | - Klaartje Kok
- Centre for Immunobiology, The Blizard Institute, Queen Mary University of London, London E1 2AT, UK
- Gastroenterology Department, Royal London Hospital, Barts Health NHS Trust, London E1 1BB, UK
| | - James O. Lindsay
- Centre for Immunobiology, The Blizard Institute, Queen Mary University of London, London E1 2AT, UK
- Gastroenterology Department, Royal London Hospital, Barts Health NHS Trust, London E1 1BB, UK
| | - Carol A. Munro
- Aberdeen Fungal Group, Institute of Medical Sciences, University of Aberdeen, Aberdeen AB24 3FX, UK
| | - Neil E. McCarthy
- Centre for Immunobiology, The Blizard Institute, Queen Mary University of London, London E1 2AT, UK
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3
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Barber-Axthelm IM, Wragg KM, Esterbauer R, Amarasena TH, Barber-Axthelm VR, Wheatley AK, Gibbon AM, Kent SJ, Juno JA. Phenotypic and functional characterization of pharmacologically expanded Vγ9Vδ2 T cells in pigtail macaques. iScience 2023; 26:106269. [PMID: 36936791 PMCID: PMC10014287 DOI: 10.1016/j.isci.2023.106269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 12/22/2022] [Accepted: 02/19/2023] [Indexed: 03/12/2023] Open
Abstract
While gaining interest as treatment for cancer and infectious disease, the clinical efficacy of Vγ9Vδ2 T cell-based immunotherapeutics has to date been limited. An improved understanding of γδ T cell heterogeneity across lymphoid and non-lymphoid tissues, before and after pharmacological expansion, is required. Here, we describe the phenotype and tissue distribution of Vγ9Vδ2 T cells at steady state and following in vivo pharmacological expansion in pigtail macaques. Intravenous phosphoantigen administration with subcutaneous rhIL-2 drove robust expansion of Vγ9Vδ2 T cells in blood and pulmonary mucosa, while expansion was confined to the pulmonary mucosa following intratracheal antigen administration. Peripheral blood Vγ9Vδ2 T cell expansion was polyclonal, and associated with a significant loss of CCR6 expression due to IL-2-mediated receptor downregulation. Overall, we show the tissue distribution and phenotype of in vivo pharmacologically expanded Vγ9Vδ2 T cells can be altered based on the antigen administration route, with implications for tissue trafficking and the clinical efficacy of Vγ9Vδ2 T cell immunotherapeutics.
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Affiliation(s)
- Isaac M. Barber-Axthelm
- Department of Microbiology and Immunology, University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC 3000, Australia
| | - Kathleen M. Wragg
- Department of Microbiology and Immunology, University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC 3000, Australia
| | - Robyn Esterbauer
- Department of Microbiology and Immunology, University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC 3000, Australia
| | - Thakshila H. Amarasena
- Department of Microbiology and Immunology, University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC 3000, Australia
| | - Valerie R.B. Barber-Axthelm
- Department of Microbiology and Immunology, University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC 3000, Australia
| | - Adam K. Wheatley
- Department of Microbiology and Immunology, University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC 3000, Australia
| | - Anne M. Gibbon
- Monash Animal Research Platform, Monash University, Clayton, VIC 3800, Australia
| | - Stephen J. Kent
- Department of Microbiology and Immunology, University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC 3000, Australia
- Melbourne Sexual Health Centre and Department of Infectious Diseases, Alfred Hospital and Central Clinical School, Monash University, Melbourne, VIC 3004, Australia
| | - Jennifer A. Juno
- Department of Microbiology and Immunology, University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC 3000, Australia
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4
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Pi J, Zhang Z, Yang E, Chen L, Zeng L, Chen Y, Wang R, Huang D, Fan S, Lin W, Shen H, Xu JF, Zeng G, Shen L. Nanocages engineered from Bacillus Calmette-Guerin facilitate protective Vγ2Vδ2 T cell immunity against Mycobacterium tuberculosis infection. J Nanobiotechnology 2022; 20:36. [PMID: 35033108 PMCID: PMC8760571 DOI: 10.1186/s12951-021-01234-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 12/29/2021] [Indexed: 12/12/2022] Open
Abstract
Tuberculosis (TB), induced by Mycobacterium tuberculosis (Mtb) infection, remains a top killer among infectious diseases. While Bacillus Calmette-Guerin (BCG) is the sole TB vaccine, the clumped-clustered features of BCG in intradermal immunization appear to limit both the BCG protection efficacy and the BCG vaccination safety. We hypothesize that engineering of clumped-clustered BCG into nanoscale particles would improve safety and also facilitate the antigen-presenting-cell (APC)’s uptake and the following processing/presentation for better anti-TB protective immunity. Here, we engineered BCG protoplasts into nanoscale membraned BCG particles, termed as “BCG-Nanocage” to enhance the anti-TB vaccination efficiency and safety. BCG-Nanocage could readily be ingested/taken by APC macrophages selectively; BCG-Nanocage-ingested macrophages exhibited better viability and developed similar antimicrobial responses with BCG-infected macrophages. BCG-Nanocage, like live BCG bacilli, exhibited the robust capability to activate and expand innate-like T effector cell populations of Vγ2+ T, CD4+ T and CD8+ T cells of rhesus macaques in the ex vivo PBMC culture. BCG-Nanocage immunization of rhesus macaques elicited similar or stronger memory-like immune responses of Vγ2Vδ2 T cells, as well as Vγ2Vδ2 T and CD4+/CD8+ T effectors compared to live BCG vaccination. BCG-Nanocage- immunized macaques developed rapidly-sustained pulmonary responses of Vγ2Vδ2 T cells upon Mtb challenge. Furthermore, BCG- and BCG-Nanocage- immunized macaques, but not saline controls, exhibited undetectable Mtb infection loads or TB lesions in the Mtb-challenged lung lobe and hilar lymph node at endpoint after challenge. Thus, the current study well justifies a large pre-clinical investigation to assess BCG-Nanocage for safe and efficacious anti-TB vaccination, which is expected to further develop novel vaccines or adjuvants. ![]()
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Affiliation(s)
- Jiang Pi
- Department of Clinical Immunology, Institute of Laboratory Medicine, School of Medical Technology, The First Dongguan Affiliated Hospital, Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, 523808, China. .,Department of Microbiology and Immunology, University of Illinois at Chicago, Chicago, IL, 60612, USA.
| | - Zhiyi Zhang
- Department of Microbiology, Zhongshan School of Medicine, Key Laboratory for Tropical Diseases Control of the Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, Guangdong, China
| | - Enzhuo Yang
- Department of Microbiology and Immunology, University of Illinois at Chicago, Chicago, IL, 60612, USA.,Clinic and Research Center of Tuberculosis, Shanghai Key Lab of Tuberculosis, Shanghai Pulmonary Hospital, Institute for Advanced Study, Tongji University School of Medicine, Shanghai, China
| | - Lingming Chen
- Department of Microbiology, Zhongshan School of Medicine, Key Laboratory for Tropical Diseases Control of the Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, Guangdong, China
| | - Lingchan Zeng
- Clinical Research Center, Department of Medical Records Management, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-Sen University, Guangzhou, 510080, Guangdong, China
| | - Yiwei Chen
- Department of Microbiology, Zhongshan School of Medicine, Key Laboratory for Tropical Diseases Control of the Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, Guangdong, China
| | - Richard Wang
- Department of Microbiology and Immunology, University of Illinois at Chicago, Chicago, IL, 60612, USA
| | - Dan Huang
- Department of Microbiology and Immunology, University of Illinois at Chicago, Chicago, IL, 60612, USA
| | - Shuhao Fan
- Department of Clinical Immunology, Institute of Laboratory Medicine, School of Medical Technology, The First Dongguan Affiliated Hospital, Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, 523808, China
| | - Wensen Lin
- Department of Clinical Immunology, Institute of Laboratory Medicine, School of Medical Technology, The First Dongguan Affiliated Hospital, Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, 523808, China
| | - Hongbo Shen
- Clinic and Research Center of Tuberculosis, Shanghai Key Lab of Tuberculosis, Shanghai Pulmonary Hospital, Institute for Advanced Study, Tongji University School of Medicine, Shanghai, China
| | - Jun-Fa Xu
- Department of Clinical Immunology, Institute of Laboratory Medicine, School of Medical Technology, The First Dongguan Affiliated Hospital, Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, 523808, China.
| | - Gucheng Zeng
- Department of Microbiology, Zhongshan School of Medicine, Key Laboratory for Tropical Diseases Control of the Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, Guangdong, China.
| | - Ling Shen
- Department of Microbiology and Immunology, University of Illinois at Chicago, Chicago, IL, 60612, USA.
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5
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Liang J, Fu L, Li M, Chen Y, Wang Y, Lin Y, Zhang H, Xu Y, Qin L, Liu J, Wang W, Hao J, Liu S, Zhang P, Lin L, Alnaggar M, Zhou J, Zhou L, Guo H, Wang Z, Liu L, Deng G, Zhang G, Wu Y, Yin Z. Allogeneic Vγ9Vδ2 T-Cell Therapy Promotes Pulmonary Lesion Repair: An Open-Label, Single-Arm Pilot Study in Patients With Multidrug-Resistant Tuberculosis. Front Immunol 2021; 12:756495. [PMID: 34975844 PMCID: PMC8715986 DOI: 10.3389/fimmu.2021.756495] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Accepted: 11/22/2021] [Indexed: 11/16/2022] Open
Abstract
The WHO’s “Global tuberculosis report 2020” lists tuberculosis (TB) as one of the leading causes of death globally. Existing anti-TB therapy strategies are far from adequate to meet the End TB Strategy goals set for 2035. Therefore, novel anti-TB therapy protocols are urgently needed. Here, we proposed an allogeneic Vγ9Vδ2 T-cell-based immunotherapy strategy and clinically evaluated its safety and efficacy in patients with multidrug-resistant TB (MDR-TB). Eight patients with MDR-TB were recruited in this open-label, single-arm pilot clinical study. Seven of these patients received allogeneic Vγ9Vδ2 T-cell therapy adjunct with anti-TB drugs in all therapy courses. Cells (1 × 108) were infused per treatment every 2 weeks, with 12 courses of cell therapy conducted for each patient, who were then followed up for 6 months to evaluate the safety and efficacy of cell therapy. The eighth patient initially received four courses of cell infusions, followed by eight courses of cell therapy plus anti-MDR-TB drugs. Clinical examinations, including clinical response, routine blood tests and biochemical indicators, chest CT imaging, immune cell surface markers, body weight, and sputum Mycobacterium tuberculosis testing, were conducted. Our study revealed that allogeneic Vγ9Vδ2 T cells are clinically safe for TB therapy. These cells exhibited clinical efficacy in multiple aspects, including promoting the repair of pulmonary lesions, partially improving host immunity, and alleviating M. tuberculosis load in vivo, regardless of their application in the presence or absence of anti-TB drugs. This pilot study opens a new avenue for anti-TB treatment and exhibits allogeneic Vγ9Vδ2 T cells as promising candidates for developing a novel cell drug for TB immunotherapy.
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Affiliation(s)
- Juan Liang
- Zhuhai Institute of Translational Medicine, Zhuhai People’s Hospital (Zhuhai Hospital Affiliated with Jinan University), Jinan University, Zhuhai, China
- National Clinical Research Center for Infectious Diseases, Guangdong Key Laboratory of Emerging Infectious Diseases, Shenzhen Third People’s Hospital, Southern University of Science and Technology, Shenzhen, China
- The Biomedical Translational Research Institute, Faculty of Medical Science, Jinan University, Guangzhou, China
| | - Liang Fu
- National Clinical Research Center for Infectious Diseases, Guangdong Key Laboratory of Emerging Infectious Diseases, Shenzhen Third People’s Hospital, Southern University of Science and Technology, Shenzhen, China
- Beijing Chest Hospital, Capital Medical University, Beijing, China
| | - Man Li
- The Biomedical Translational Research Institute, Faculty of Medical Science, Jinan University, Guangzhou, China
- Department for gdT Clinical Research and Development, Guangdong GD Kongming Biotech Ltd., Guangzhou, China
| | - Yuyuan Chen
- The Biomedical Translational Research Institute, Faculty of Medical Science, Jinan University, Guangzhou, China
| | - Yi Wang
- National Clinical Research Center for Infectious Diseases, Guangdong Key Laboratory of Emerging Infectious Diseases, Shenzhen Third People’s Hospital, Southern University of Science and Technology, Shenzhen, China
| | - Yi Lin
- National Clinical Research Center for Infectious Diseases, Guangdong Key Laboratory of Emerging Infectious Diseases, Shenzhen Third People’s Hospital, Southern University of Science and Technology, Shenzhen, China
| | - Hailin Zhang
- National Clinical Research Center for Infectious Diseases, Guangdong Key Laboratory of Emerging Infectious Diseases, Shenzhen Third People’s Hospital, Southern University of Science and Technology, Shenzhen, China
| | - Yan Xu
- The Biomedical Translational Research Institute, Faculty of Medical Science, Jinan University, Guangzhou, China
| | - Linxiu Qin
- National Clinical Research Center for Infectious Diseases, Guangdong Key Laboratory of Emerging Infectious Diseases, Shenzhen Third People’s Hospital, Southern University of Science and Technology, Shenzhen, China
| | - Juncai Liu
- National Clinical Research Center for Infectious Diseases, Guangdong Key Laboratory of Emerging Infectious Diseases, Shenzhen Third People’s Hospital, Southern University of Science and Technology, Shenzhen, China
| | - Weiyu Wang
- National Clinical Research Center for Infectious Diseases, Guangdong Key Laboratory of Emerging Infectious Diseases, Shenzhen Third People’s Hospital, Southern University of Science and Technology, Shenzhen, China
| | - Jianlei Hao
- The Biomedical Translational Research Institute, Faculty of Medical Science, Jinan University, Guangzhou, China
| | - Shuyan Liu
- National Clinical Research Center for Infectious Diseases, Guangdong Key Laboratory of Emerging Infectious Diseases, Shenzhen Third People’s Hospital, Southern University of Science and Technology, Shenzhen, China
| | - Peize Zhang
- National Clinical Research Center for Infectious Diseases, Guangdong Key Laboratory of Emerging Infectious Diseases, Shenzhen Third People’s Hospital, Southern University of Science and Technology, Shenzhen, China
| | - Li Lin
- Department for gdT Clinical Research and Development, Guangdong GD Kongming Biotech Ltd., Guangzhou, China
| | - Mohammed Alnaggar
- Tongji Chibi Hospital, Tongji Medical College, Huazhong University of Science and Technology, Chibi, China
| | - Jie Zhou
- Department for Tuberculosis Control, Foshan Fourth People’s Hospital, Foshan, China
| | - Lin Zhou
- Department for Tuberculosis Control, Centre for Tuberculosis Control of Guangdong Province, Guangzhou, China
| | - Huixin Guo
- Department for Tuberculosis Control, Centre for Tuberculosis Control of Guangdong Province, Guangzhou, China
| | - Zhaoqin Wang
- National Clinical Research Center for Infectious Diseases, Guangdong Key Laboratory of Emerging Infectious Diseases, Shenzhen Third People’s Hospital, Southern University of Science and Technology, Shenzhen, China
| | - Lei Liu
- National Clinical Research Center for Infectious Diseases, Guangdong Key Laboratory of Emerging Infectious Diseases, Shenzhen Third People’s Hospital, Southern University of Science and Technology, Shenzhen, China
| | - Guofang Deng
- National Clinical Research Center for Infectious Diseases, Guangdong Key Laboratory of Emerging Infectious Diseases, Shenzhen Third People’s Hospital, Southern University of Science and Technology, Shenzhen, China
- *Correspondence: Zhinan Yin, ; Yangzhe Wu, ; Guoliang Zhang, ; Guofang Deng,
| | - Guoliang Zhang
- National Clinical Research Center for Infectious Diseases, Guangdong Key Laboratory of Emerging Infectious Diseases, Shenzhen Third People’s Hospital, Southern University of Science and Technology, Shenzhen, China
- *Correspondence: Zhinan Yin, ; Yangzhe Wu, ; Guoliang Zhang, ; Guofang Deng,
| | - Yangzhe Wu
- Zhuhai Institute of Translational Medicine, Zhuhai People’s Hospital (Zhuhai Hospital Affiliated with Jinan University), Jinan University, Zhuhai, China
- The Biomedical Translational Research Institute, Faculty of Medical Science, Jinan University, Guangzhou, China
- *Correspondence: Zhinan Yin, ; Yangzhe Wu, ; Guoliang Zhang, ; Guofang Deng,
| | - Zhinan Yin
- Zhuhai Institute of Translational Medicine, Zhuhai People’s Hospital (Zhuhai Hospital Affiliated with Jinan University), Jinan University, Zhuhai, China
- The Biomedical Translational Research Institute, Faculty of Medical Science, Jinan University, Guangzhou, China
- *Correspondence: Zhinan Yin, ; Yangzhe Wu, ; Guoliang Zhang, ; Guofang Deng,
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6
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De Gassart A, Le KS, Brune P, Agaugué S, Sims J, Goubard A, Castellano R, Joalland N, Scotet E, Collette Y, Valentin E, Ghigo C, Pasero C, Colazet M, Guillén J, Cano CE, Marabelle A, De Bonno J, Hoet R, Truneh A, Olive D, Frohna P. Development of ICT01, a first-in-class, anti-BTN3A antibody for activating Vγ9Vδ2 T cell-mediated antitumor immune response. Sci Transl Med 2021; 13:eabj0835. [PMID: 34669444 DOI: 10.1126/scitranslmed.abj0835] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
[Figure: see text].
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Affiliation(s)
| | | | | | | | | | - Armelle Goubard
- Aix Marseille University, CNRS, INSERM, Institut Paoli-Calmettes, CRCM, TrGET preclinical platform, 13009 Marseille, France
| | - Rémy Castellano
- Aix Marseille University, CNRS, INSERM, Institut Paoli-Calmettes, CRCM, TrGET preclinical platform, 13009 Marseille, France
| | - Noémie Joalland
- Université de Nantes, INSERM, CNRS, CRCINA, F-44000 Nantes, France.,LabEx IGO "Immunotherapy, Graft, and Oncology," Nantes F-44000, France
| | - Emmanuel Scotet
- Université de Nantes, INSERM, CNRS, CRCINA, F-44000 Nantes, France.,LabEx IGO "Immunotherapy, Graft, and Oncology," Nantes F-44000, France
| | - Yves Collette
- Aix Marseille University, CNRS, INSERM, Institut Paoli-Calmettes, CRCM, TrGET preclinical platform, 13009 Marseille, France
| | | | | | | | | | | | | | - Aurélien Marabelle
- Département d'Innovation Thérapeutique et d'Essais Précoces (DITEP), Gustave Roussy, Université Paris-Saclay, 94805 Villejuif, France
| | - Johann De Bonno
- Division of Cancer Therapeutics, Institute of Cancer Research (ICR), London and Royal Marsden NHS Trust, Sutton SM2 5PT, UK
| | - René Hoet
- ImCheck Therapeutics, 13009 Marseille, France.,Biopharmaceutics, Dept. Pathology, University of Maastricht, 6200 MD Netherlands
| | | | - Daniel Olive
- Centre de Recherche en Cancérologie de Marseille (CRCM), Inserm, U1068, CNRS, UMR7258, Institut Paoli-Calmettes, Aix-Marseille University, UM 105, 13009 Marseille, France
| | - Paul Frohna
- ImCheck Therapeutics, 13009 Marseille, France
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7
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McCarthy NE, Stagg AJ, Price CL, Mann ER, Gellatly NL, Al-Hassi HO, Knight SC, Panoskaltsis N. Patients with gastrointestinal irritability after TGN1412-induced cytokine storm displayed selective expansion of gut-homing αβ and γδT cells. Cancer Immunol Immunother 2021; 70:1143-1153. [PMID: 33048222 PMCID: PMC7552579 DOI: 10.1007/s00262-020-02723-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 09/11/2020] [Indexed: 12/17/2022]
Abstract
Following infusion of the anti-CD28 superagonist monoclonal antibody TGN1412, three of six previously healthy, young male recipients developed gastrointestinal irritability associated with increased expression of 'gut-homing' integrin β7 on peripheral blood αβT cells. This subset of patients with intestinal symptoms also displayed a striking and persistent expansion of putative Vδ2+ γδT cells in the circulation which declined over a 2-year period following drug infusion, concordant with subsiding gut symptoms. These data demonstrate that TGN1412-induced gastrointestinal symptoms were associated with dysregulation of the 'gut-homing' pool of blood αβ and γδT cells, induced directly by the antibody and/or arising from the subsequent cytokine storm.
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Affiliation(s)
- Neil E McCarthy
- Antigen Presentation Research Group, Imperial College London, Northwick Park and St. Mark's Campus, London, UK.
- Centre for Immunobiology, The Blizard Institute, Bart's and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK.
| | - Andrew J Stagg
- Antigen Presentation Research Group, Imperial College London, Northwick Park and St. Mark's Campus, London, UK
- Centre for Immunobiology, The Blizard Institute, Bart's and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Claire L Price
- Antigen Presentation Research Group, Imperial College London, Northwick Park and St. Mark's Campus, London, UK
- Lucid Group Communications, Buckinghamshire, UK
| | - Elizabeth R Mann
- Antigen Presentation Research Group, Imperial College London, Northwick Park and St. Mark's Campus, London, UK
- Lydia Becker Institute of Immunology and Inflammation, University of Manchester, Manchester, UK
| | - Nichola L Gellatly
- Antigen Presentation Research Group, Imperial College London, Northwick Park and St. Mark's Campus, London, UK
| | - Hafid O Al-Hassi
- Antigen Presentation Research Group, Imperial College London, Northwick Park and St. Mark's Campus, London, UK
- Research Institute in Healthcare Science, Faculty of Science and Engineering, University of Wolverhampton, Wolverhampton, UK
| | - Stella C Knight
- Antigen Presentation Research Group, Imperial College London, Northwick Park and St. Mark's Campus, London, UK
| | - Nicki Panoskaltsis
- Antigen Presentation Research Group, Imperial College London, Northwick Park and St. Mark's Campus, London, UK.
- Department of Haematology, Imperial College London, Northwick Park and St. Mark's Campus, London, UK.
- Department of Hematology and Medical Oncology, Winship Cancer Institute, Emory University School of Medicine, Atlanta, GA, USA.
- BioMedical Systems Engineering Laboratory, Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA.
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8
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Caron J, Ridgley LA, Bodman-Smith M. How to Train Your Dragon: Harnessing Gamma Delta T Cells Antiviral Functions and Trained Immunity in a Pandemic Era. Front Immunol 2021; 12:666983. [PMID: 33854516 PMCID: PMC8039298 DOI: 10.3389/fimmu.2021.666983] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Accepted: 03/12/2021] [Indexed: 12/23/2022] Open
Abstract
The emergence of viruses with pandemic potential such as the SARS-CoV-2 coronavirus causing COVID-19 poses a global health challenge. There is remarkable progress in vaccine technology in response to this threat, but their design often overlooks the innate arm of immunity. Gamma Delta (γδ) T cells are a subset of T cells with unique features that gives them a key role in the innate immune response to a variety of homeostatic alterations, from cancer to microbial infections. In the context of viral infection, a growing body of evidence shows that γδ T cells are particularly equipped for early virus detection, which triggers their subsequent activation, expansion and the fast deployment of antiviral functions such as direct cytotoxic pathways, secretion of cytokines, recruitment and activation of other immune cells and mobilization of a trained immunity memory program. As such, γδ T cells represent an attractive target to stimulate for a rapid and effective resolution of viral infections. Here, we review the known aspects of γδ T cells that make them crucial component of the immune response to viruses, and the ways that their antiviral potential can be harnessed to prevent or treat viral infection.
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Affiliation(s)
- Jonathan Caron
- Infection and Immunity Research Institute, St. George's University of London, London, United Kingdom
| | - Laura Alice Ridgley
- Infection and Immunity Research Institute, St. George's University of London, London, United Kingdom
| | - Mark Bodman-Smith
- Infection and Immunity Research Institute, St. George's University of London, London, United Kingdom
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9
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Ruibal P, Voogd L, Joosten SA, Ottenhoff THM. The role of donor-unrestricted T-cells, innate lymphoid cells, and NK cells in anti-mycobacterial immunity. Immunol Rev 2021; 301:30-47. [PMID: 33529407 PMCID: PMC8154655 DOI: 10.1111/imr.12948] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 01/07/2021] [Accepted: 01/07/2021] [Indexed: 12/15/2022]
Abstract
Vaccination strategies against mycobacteria, focusing mostly on classical T‐ and B‐cells, have shown limited success, encouraging the addition of alternative targets. Classically restricted T‐cells recognize antigens presented via highly polymorphic HLA class Ia and class II molecules, while donor‐unrestricted T‐cells (DURTs), with few exceptions, recognize ligands via genetically conserved antigen presentation molecules. Consequently, DURTs can respond to the same ligands across diverse human populations. DURTs can be activated either through cognate TCR ligation or via bystander cytokine signaling. TCR‐driven antigen‐specific activation of DURTs occurs upon antigen presentation via non‐polymorphic molecules such as HLA‐E, CD1, MR1, and butyrophilin, leading to the activation of HLA‐E–restricted T‐cells, CD1‐restricted T‐cells, mucosal‐associated invariant T‐cells (MAITs), and TCRγδ T‐cells, respectively. NK cells and innate lymphoid cells (ILCs), which lack rearranged TCRs, are activated through other receptor‐triggering pathways, or can be engaged through bystander cytokines, produced, for example, by activated antigen‐specific T‐cells or phagocytes. NK cells can also develop trained immune memory and thus could represent cells of interest to mobilize by novel vaccines. In this review, we summarize the latest findings regarding the contributions of DURTs, NK cells, and ILCs in anti–M tuberculosis, M leprae, and non‐tuberculous mycobacterial immunity and explore possible ways in which they could be harnessed through vaccines and immunotherapies to improve protection against Mtb.
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Affiliation(s)
- Paula Ruibal
- Department of Infectious Diseases, Leiden University Medical Center, Leiden, The Netherlands
| | - Linda Voogd
- Department of Infectious Diseases, Leiden University Medical Center, Leiden, The Netherlands
| | - Simone A Joosten
- Department of Infectious Diseases, Leiden University Medical Center, Leiden, The Netherlands
| | - Tom H M Ottenhoff
- Department of Infectious Diseases, Leiden University Medical Center, Leiden, The Netherlands
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10
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Shen L, Huang D, Qaqish A, Frencher J, Yang R, Shen H, Chen ZW. Fast-acting γδ T-cell subpopulation and protective immunity against infections. Immunol Rev 2020; 298:254-263. [PMID: 33037700 DOI: 10.1111/imr.12927] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 09/03/2020] [Accepted: 09/04/2020] [Indexed: 12/20/2022]
Abstract
Unique Vγ2Vδ2 (Vγ9Vδ2) T cells existing only in human and non-human primates, account for the majority of circulating γδ T cells in human adults. Vγ2Vδ2 T cells are the sole γδ T-cell subpopulation capable of recognizing the microbial (E)-4-hydroxy-3-methyl-but-2-enyl pyrophosphate (HMBPP) produced by selected pathogens during infections. Recent seminal studies in non-human primate models have demonstrated that the unique HMBPP-specific Vγ2Vδ2 T cells are fast-acting, multi-functional, and protective during infections. This article reviews the recent seminal observations of Vγ2Vδ2 T cells in protective mechanisms against tuberculosis and other infections.
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Affiliation(s)
- Ling Shen
- Department of Microbiology and Immunology, University of Illinois College of Medicine Chicago, Chicago, IL, USA
| | - Dan Huang
- Department of Microbiology and Immunology, University of Illinois College of Medicine Chicago, Chicago, IL, USA
| | - Arwa Qaqish
- Department of Microbiology and Immunology, University of Illinois College of Medicine Chicago, Chicago, IL, USA
| | - James Frencher
- Department of Microbiology and Immunology, University of Illinois College of Medicine Chicago, Chicago, IL, USA
| | - Rui Yang
- Clinic and Research Center of Tuberculosis, Shanghai Key Laboratory of Tuberculosis, Tongji University Shanghai Pulmonary Hospital, Shanghai, China
| | - Hongbo Shen
- Clinic and Research Center of Tuberculosis, Shanghai Key Laboratory of Tuberculosis, Tongji University Shanghai Pulmonary Hospital, Shanghai, China
| | - Zheng W Chen
- Department of Microbiology and Immunology, University of Illinois College of Medicine Chicago, Chicago, IL, USA
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11
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Juno JA, Kent SJ. What Can Gamma Delta T Cells Contribute to an HIV Cure? Front Cell Infect Microbiol 2020; 10:233. [PMID: 32509601 PMCID: PMC7248205 DOI: 10.3389/fcimb.2020.00233] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 04/23/2020] [Indexed: 01/19/2023] Open
Abstract
Elimination of the latent HIV reservoir remains a major barrier to achieving an HIV cure. In this review, we discuss the cytolytic nature of human gamma delta T cells and highlight the emerging evidence that they can target and eliminate HIV-infected T cells. Based on observations from human clinical trials assessing gamma delta immunotherapy in oncology, we suggest key questions and research priorities for the study of these unique T cells in HIV cure research.
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Affiliation(s)
- Jennifer A Juno
- Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, VIC, Australia
| | - Stephen J Kent
- Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, VIC, Australia.,Department of Infectious Diseases, Melbourne Sexual Health Centre, Alfred Health, Central Clinical School, Monash University, Clayton, VIC, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Melbourne, Melbourne, VIC, Australia
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12
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Hannaway RF, Wang X, Schneider M, Slow S, Cowan J, Brockway B, Schofield MR, Morgan XC, Murdoch DR, Ussher JE. Mucosal-associated invariant T cells and Vδ2 + γδ T cells in community acquired pneumonia: association of abundance in sputum with clinical severity and outcome. Clin Exp Immunol 2020; 199:201-215. [PMID: 31587268 PMCID: PMC6954682 DOI: 10.1111/cei.13377] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/30/2019] [Indexed: 01/28/2023] Open
Abstract
Mucosal-associated invariant T (MAIT) cells and Vδ2+ γδ T cells are anti-bacterial innate-like lymphocytes (ILLs) that are enriched in blood and mucosa. ILLs have been implicated in control of infection. However, the role of ILLs in community-acquired pneumonia (CAP) is unknown. Using sputum samples from a well-characterized CAP cohort, MAIT cell and Vδ2+ T cell abundance was determined by quantitative polymerase chain reaction (qPCR). Cytokine and chemokine concentrations in sputum were measured. The capacity of bacteria in sputum to produce activating ligands for MAIT cells and Vδ2+ T cells was inferred by 16S rRNA sequencing. MAIT cell abundance in sputum was higher in patients with less severe pneumonia; duration of hospital admission was inversely correlated with both MAIT and Vδ2+ T cell abundance. The abundance of both ILLs was higher in patients with a confirmed bacterial aetiology; however, there was no correlation with total bacterial load or the predicted capacity of bacteria to produce activating ligands. Sputum MAIT cell abundance was associated with interferon (IFN)-α, IFN-γ, and sputum neutrophil abundance, while Vδ2+ T cell abundance was associated with CXCL11 and IFN-γ. Therefore, MAIT and Vδ2+ T cells can be detected in sputum in CAP, where they may contribute to improved clinical outcome.
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Affiliation(s)
- R. F. Hannaway
- Department of Microbiology and ImmunologyUniversity of OtagoDunedinNew Zealand
| | - X. Wang
- Department of Microbiology and ImmunologyUniversity of OtagoDunedinNew Zealand
| | - M. Schneider
- Department of Microbiology and ImmunologyUniversity of OtagoDunedinNew Zealand
| | - S. Slow
- Department of Pathology and Biomedical SciencesUniversity of OtagoChristchurchNew Zealand
| | - J. Cowan
- Dunedin School of MedicineUniversity of OtagoDunedinNew Zealand
| | - B. Brockway
- Dunedin School of MedicineUniversity of OtagoDunedinNew Zealand
| | - M. R. Schofield
- Department of Mathematics and StatisticsUniversity of OtagoDunedinNew Zealand
| | - X. C. Morgan
- Department of Microbiology and ImmunologyUniversity of OtagoDunedinNew Zealand
| | - D. R. Murdoch
- Department of Pathology and Biomedical SciencesUniversity of OtagoChristchurchNew Zealand
| | - J. E. Ussher
- Department of Microbiology and ImmunologyUniversity of OtagoDunedinNew Zealand
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13
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Yang R, Yao L, Shen L, Sha W, Modlin RL, Shen H, Chen ZW. IL-12 Expands and Differentiates Human Vγ2Vδ2 T Effector Cells Producing Antimicrobial Cytokines and Inhibiting Intracellular Mycobacterial Growth. Front Immunol 2019; 10:913. [PMID: 31080452 PMCID: PMC6497761 DOI: 10.3389/fimmu.2019.00913] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 04/09/2019] [Indexed: 12/25/2022] Open
Abstract
While IL-12 plays a key role in differentiation of protective CD4+ Th1 response, little is known about mechanisms whereby IL-12 differentiates other T-cell populations. Published studies suggest that predominant Vγ2Vδ2 T cells in humans/nonhuman primates (NHP) are a fast-acting T-cell subset, with capacities to rapidly expand and produce Th1 and cytotoxic cytokines in response to phosphoantigen (E)-4-hydroxy-3-methyl-but-2-enyl pyrophosphate (HMBPP) produced by Mycobacterium tuberculosis (Mtb) or others. However, whether IL-12 signaling pathway mediates fast-acting and Th1 or anti-microbial features of Vγ2Vδ2 T cells remains poorly defined. Here, we show that IL-12, but not other IL-12 family members IL-27/IL-35, apparently expanded HMBPP-activated Vγ2Vδ2 T cells. Although IL-12 and IL-2 similarly expanded HMBPP-activated Vγ2Vδ2 T-cell clones, the IL-12-induced expansion did not require endogenous IL-2 or IL-2 co-signaling during HMBPP + IL-12 co-treatment. IL-12-induced expansion of Vγ2Vδ2 T cells required the PI3K/AKT and STAT4 activation pathways and endogenous TNF-α signaling but did not involve p38/MAPK or IFN-γ signals. IL-12-expanded Vγ2Vδ2 T cells exhibited central/effector memory phenotypes and differentiated into polyfunctional effector cell subtypes which expressed TBX21/T-bet, antimicrobial cytokines IFN-γ, TNF-α, GM-CSF, and cytotoxic granule molecules. Furthermore, the IL-12-expanded Vγ2Vδ2 T cells inhibited the growth of intracellular mycobacteria in IFN-γ- or TNF-α-dependent fashion. Our findings support the concept that IL-12 drives early development of fast-acting Vγ2Vδ2 T effector cells in antimicrobial immune responses.
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Affiliation(s)
- Rui Yang
- Shanghai Key Lab of Tuberculosis, Clinic and Research Center of Tuberculosis, Shanghai Pulmonary Hospital, Institute for Advanced Study, Tongji University School of Medicine, Shanghai, China
| | - Lan Yao
- Shanghai Key Lab of Tuberculosis, Clinic and Research Center of Tuberculosis, Shanghai Pulmonary Hospital, Institute for Advanced Study, Tongji University School of Medicine, Shanghai, China
| | - Ling Shen
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, IL, United States
| | - Wei Sha
- Shanghai Key Lab of Tuberculosis, Clinic and Research Center of Tuberculosis, Shanghai Pulmonary Hospital, Institute for Advanced Study, Tongji University School of Medicine, Shanghai, China
| | - Robert L. Modlin
- Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, Los Angeles, CA, United States
- Division of Dermatology, David Geffen School of Medicine at University of California, Los Angeles, Los Angeles, CA, United States
| | - Hongbo Shen
- Shanghai Key Lab of Tuberculosis, Clinic and Research Center of Tuberculosis, Shanghai Pulmonary Hospital, Institute for Advanced Study, Tongji University School of Medicine, Shanghai, China
| | - Zheng W. Chen
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, IL, United States
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14
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Immunization of Vγ2Vδ2 T cells programs sustained effector memory responses that control tuberculosis in nonhuman primates. Proc Natl Acad Sci U S A 2019; 116:6371-6378. [PMID: 30850538 PMCID: PMC6442559 DOI: 10.1073/pnas.1811380116] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Despite the urgent need for a better tuberculosis (TB) vaccine, relevant protective mechanisms remain unknown. We previously defined protective phosphoantigen (E)-4-hydroxy-3-methyl-but-2-enyl pyrophosphate (HMBPP)–specific Vγ2Vδ2 T cells as a unique subset in primates, and, here, we immunized them selectively for protection against TB. A single respiratory vaccination of macaques with attenuated HMBPP-producing Listeria monocytogenes (Lm ΔactA prfA*), but not an HMBPP-lacking ΔgcpE Listeria strain, expanded Vγ2Vδ2 T cells, elicited Th1-like Vγ2Vδ2 T cell responses, and reduced TB infection/pathology after moderate-dose TB challenge. Such protection correlated with rapid memory-like, Th1-like Vγ2Vδ2 T cell responses, the presence of tissue-resident Vγ2Vδ2 T effectors coproducing IFN-γ/perforin and inhibiting intracellular Mycobacterium tuberculosis growth, and enhanced CD4+/CD8+ T cell responses. These findings establish a concept incorporating immunization of human Vγ2Vδ2 T cells for TB vaccine development. Tuberculosis (TB) remains a leading killer among infectious diseases, and a better TB vaccine is urgently needed. The critical components and mechanisms of vaccine-induced protection against Mycobacterium tuberculosis (Mtb) remain incompletely defined. Our previous studies demonstrate that Vγ2Vδ2 T cells specific for (E)-4-hydroxy-3-methyl-but-2-enyl pyrophosphate (HMBPP) phosphoantigen are unique in primates as multifunctional effectors of immune protection against TB infection. Here, we selectively immunized Vγ2Vδ2 T cells and assessed the effect on infection in a rhesus TB model. A single respiratory vaccination of macaques with an HMBPP-producing attenuated Listeria monocytogenes (Lm ΔactA prfA*) caused prolonged expansion of HMBPP-specific Vγ2Vδ2 T cells in circulating and pulmonary compartments. This did not occur in animals similarly immunized with an Lm ΔgcpE strain, which did not produce HMBPP. Lm ΔactA prfA* vaccination elicited increases in Th1-like Vγ2Vδ2 T cells in the airway, and induced containment of TB infection after pulmonary challenge. The selective immunization of Vγ2Vδ2 T cells reduced lung pathology and mycobacterial dissemination to extrapulmonary organs. Vaccine effects coincided with the fast-acting memory-like response of Th1-like Vγ2Vδ2 T cells and tissue-resident Vγ2Vδ2 effector T cells that produced both IFN-γ and perforin and inhibited intracellular Mtb growth. Furthermore, selective immunization of Vγ2Vδ2 T cells enabled CD4+ and CD8+ T cells to mount earlier pulmonary Th1 responses to TB challenge. Our findings show that selective immunization of Vγ2Vδ2 T cells can elicit fast-acting and durable memory-like responses that amplify responses of other T cell subsets, and provide an approach to creating more effective TB vaccines.
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15
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Hsiao CHC, Wiemer AJ. A power law function describes the time- and dose-dependency of Vγ9Vδ2 T cell activation by phosphoantigens. Biochem Pharmacol 2018; 158:298-304. [PMID: 30391478 DOI: 10.1016/j.bcp.2018.10.035] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Accepted: 10/31/2018] [Indexed: 02/08/2023]
Abstract
Phosphoantigens stimulate Vγ9Vδ2 T cells after binding to BTN3A1 in target cells and cell-cell contact. We evaluated phosphoantigens including diphosphates, bisphosphonates, and prodrugs for ability to induce leukemia cells to stimulate Vγ9Vδ2 T cell interferon-γ secretion. Most compounds displayed time-dependent activity at exposure times between 15 and 240 min. Potency (EC50 values) ranged between 8.4 nM and >100 µM. The diphosphate C-HMBPP displayed a shallow dose-response slope (Hill slope = 0.71), while the bisphosphonate slopes were steep (Hill slopes > 2), and the prodrugs intermediate. The bis-acyloxyalkyl POM2-C-HMBP showed low nanomolar potency even at an exposure time of 1 min. Mixed aryl-POM prodrugs also retained excellent potency at 15 min, while aryl-amidates were time dependent below 240 min. The sum of the dose and time logarithms is often constant, while a power law function fits most compounds. Collectively, these findings illustrate the exquisite activity of prodrugs relative to diphosphates and bisphosphonates.
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Affiliation(s)
| | - Andrew J Wiemer
- Department of Pharmaceutical Sciences, University of Connecticut, Storrs, CT 06269, USA; Institute for Systems Genomics, University of Connecticut, Storrs, CT 06269, USA.
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16
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Lentini NA, Foust BJ, Hsiao CHC, Wiemer AJ, Wiemer DF. Phosphonamidate Prodrugs of a Butyrophilin Ligand Display Plasma Stability and Potent Vγ9 Vδ2 T Cell Stimulation. J Med Chem 2018; 61:8658-8669. [PMID: 30199251 PMCID: PMC6703555 DOI: 10.1021/acs.jmedchem.8b00655] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Small organophosphorus compounds stimulate Vγ9 Vδ2 T cells if they serve as ligands of butyrophilin 3A1. Because the most potent natural ligand is ( E)-4-hydroxy-3-methyl-but-2-enyl diphosphate (HMBPP), which is the last intermediate in bacterial biosynthesis of isoprenoids that is not found in mammalian metabolism, activation of these T cells represents an important component of the immune response to bacterial infections. To identify butyrophilin ligands that may have greater plasma stability, and clinical potential, we have prepared a set of aryl phosphonamidate derivatives (9a-i) of the natural ligand. Testing of these new compounds in assays of T cell response has revealed that this strategy can provide compounds with high potency for expansion of Vγ9 Vδ2 T cells (9f, EC50 = 340 pM) and interferon γ production in response to loaded K562 cells (9e, EC50 = 62 nM). Importantly, all compounds of this class display extended plasma stability ( t1/2 > 24 h). These findings increase our understanding of metabolism of butyrophilin ligands and the structure-activity relationships of phosphonamidate prodrugs.
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Affiliation(s)
- Nicholas A Lentini
- Department of Chemistry , University of Iowa , Iowa City , Iowa 52242-1294 , United States
| | - Benjamin J Foust
- Department of Chemistry , University of Iowa , Iowa City , Iowa 52242-1294 , United States
| | - Chia-Hung Christine Hsiao
- Department of Pharmaceutical Sciences , University of Connecticut , Storrs , Connecticut 06269-3092 , United States
| | - Andrew J Wiemer
- Department of Pharmaceutical Sciences , University of Connecticut , Storrs , Connecticut 06269-3092 , United States
- Institute for Systems Genomics , University of Connecticut , Storrs , Connecticut 06269-3092 , United States
| | - David F Wiemer
- Department of Chemistry , University of Iowa , Iowa City , Iowa 52242-1294 , United States
- Department of Pharmacology , University of Iowa , Iowa City , Iowa 52242-1109 , United States
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17
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Yan L, Shen H, Xiao H. Characteristics of peripheral Vγ2Vδ2 T cells in interferon-γ release assay negative pulmonary tuberculosis patients. BMC Infect Dis 2018; 18:453. [PMID: 30180814 PMCID: PMC6123966 DOI: 10.1186/s12879-018-3328-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 08/14/2018] [Indexed: 11/10/2022] Open
Abstract
Background It is not fully explained why some active tuberculosis patients show negative interferon-γ release assays (IGRAs). In this study, we tried to explore associations of IGRAs with the characteristics of peripheral Vγ2Vδ2 T cells and their functions of producing cytokines. Methods 32 pulmonary tuberculosis patients were enrolled and divided into two groups according to their IGRAs results: 16 with IGRA-negative as test group and 16 with IGRA-positive as control group. Chest X-rays and T-SPOT.TB tests were performed and the severity of the lung lesions was scored. The amount of Vγ2Vδ2T cell and their expression levels of the apoptosis-related membrane surface molecule Fas and FasL in peripheral blood were analyzed by flow cytometry, and the function of secreting cytokines (IFN-γ, TNF-α and IL-17A) of Vγ2Vδ2 T cell were determined by intracellular cytokine staining. Results The IGRA-negative TB patients had more lesion severity scores and displayed reduced peripheral blood Vγ2Vδ2 T cell counts (p = 0.009) as well as higher Fas and FasL expression in peripheral blood Vγ2Vδ2 T cells (p = 0.043, 0.026). A high lesion severity score was correlated with a decreased Vδ2+ T cell number and increased Vγ2Vδ2 T cells Fas/FasL expression leve in the peripheral blood (p = 0.00, P < 0.01). The function of secreting cytokines was slightly impaired in IGRA-negative TB patients (p = 0.402). There is no significant differences in expression levels of Fas and FasL in CD4+ T cells (p = 0.224, 0.287) or CD8+ T cells (p = 0.184, 0.067) between test and control groups. Conclusion Compared with IGRA-positive TB patients, the IGRA-negative TB patients had more lesion severity scores, the number of Vγ2Vδ2 T cells decreased and the function of secreting cytokines impaired. In addition, we suggest that increased expression of Fas/FasL triggers Vγ2Vδ2 T cell apoptosis. Electronic supplementary material The online version of this article (10.1186/s12879-018-3328-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Liping Yan
- Department of Tuberculosis, Shanghai Pulmonary Hospital, Tongji University School of Medicine, 507 Zhengmin Road, Shanghai, 200433, China
| | - Hongbo Shen
- Department of Tuberculosis, Shanghai Pulmonary Hospital, Tongji University School of Medicine, 507 Zhengmin Road, Shanghai, 200433, China.
| | - Heping Xiao
- Department of Tuberculosis, Shanghai Pulmonary Hospital, Tongji University School of Medicine, 507 Zhengmin Road, Shanghai, 200433, China.
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18
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Van Acker HH, Campillo-Davo D, Roex G, Versteven M, Smits EL, Van Tendeloo VF. The role of the common gamma-chain family cytokines in γδ T cell-based anti-cancer immunotherapy. Cytokine Growth Factor Rev 2018; 41:54-64. [PMID: 29773448 DOI: 10.1016/j.cytogfr.2018.05.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2018] [Revised: 05/07/2018] [Accepted: 05/09/2018] [Indexed: 12/28/2022]
Abstract
Cytokines of the common gamma-chain receptor family, comprising interleukin (IL)-2, IL-4, IL-7, IL-9, IL-15 and IL-21, are vital with respect to organizing and sustaining healthy immune cell functions. Supporting the anti-cancer immune response, these cytokines inspire great interest for their use as vaccine adjuvants and cancer immunotherapies. It is against this background that gamma delta (γδ) T cells, as special-force soldiers and natural contributors of the tumor immunosurveillance, also received a lot of attention the last decade. As γδ T cell-based cancer trials are coming of age, this present review focusses on the effects of the different cytokines of the common gamma-chain receptor family on γδ T cells with respect to boosting γδ T cells as a therapeutic target in cancer immunotherapy. This review also gathers data that IL-15 in particular exhibits key features for augmenting the anti-tumor activity of effector killer γδ T cells whilst overcoming the myriad of immune escape mechanisms used by cancer cells.
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Affiliation(s)
- Heleen H Van Acker
- Laboratory of Experimental Hematology, Tumor Immunology Group (TIGR), Vaccine & Infectious Disease Institute (VAXINFECTIO), University of Antwerp, Faculty of Medicine and Health Sciences, Antwerp, Belgium.
| | - Diana Campillo-Davo
- Laboratory of Experimental Hematology, Tumor Immunology Group (TIGR), Vaccine & Infectious Disease Institute (VAXINFECTIO), University of Antwerp, Faculty of Medicine and Health Sciences, Antwerp, Belgium
| | - Gils Roex
- Laboratory of Experimental Hematology, Tumor Immunology Group (TIGR), Vaccine & Infectious Disease Institute (VAXINFECTIO), University of Antwerp, Faculty of Medicine and Health Sciences, Antwerp, Belgium
| | - Maarten Versteven
- Laboratory of Experimental Hematology, Tumor Immunology Group (TIGR), Vaccine & Infectious Disease Institute (VAXINFECTIO), University of Antwerp, Faculty of Medicine and Health Sciences, Antwerp, Belgium
| | - Evelien L Smits
- Laboratory of Experimental Hematology, Tumor Immunology Group (TIGR), Vaccine & Infectious Disease Institute (VAXINFECTIO), University of Antwerp, Faculty of Medicine and Health Sciences, Antwerp, Belgium; Center for Cell Therapy & Regenerative Medicine, Antwerp University Hospital, Edegem, Belgium; Center for Oncological Research (CORE), Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | - Viggo F Van Tendeloo
- Laboratory of Experimental Hematology, Tumor Immunology Group (TIGR), Vaccine & Infectious Disease Institute (VAXINFECTIO), University of Antwerp, Faculty of Medicine and Health Sciences, Antwerp, Belgium
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McCarthy NE, Eberl M. Human γδ T-Cell Control of Mucosal Immunity and Inflammation. Front Immunol 2018; 9:985. [PMID: 29867962 PMCID: PMC5949325 DOI: 10.3389/fimmu.2018.00985] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 04/20/2018] [Indexed: 01/26/2023] Open
Abstract
Human γδ T-cells include some of the most common "antigen-specific" cell types in peripheral blood and are enriched yet further at mucosal barrier sites where microbial infection and tumors often originate. While the γδ T-cell compartment includes multiple subsets with highly flexible effector functions, human mucosal tissues are dominated by host stress-responsive Vδ1+ T-cells and microbe-responsive Vδ2+ T-cells. Widely recognized for their potent cytotoxicity, emerging data suggest that γδ T-cells also exert strong influences on downstream adaptive immunity to pathogens and tumors, in particular via activation of antigen-presenting cells and/or direct stimulation of other mucosal leukocytes. These unique functional attributes and lack of MHC restriction have prompted considerable interest in therapeutic targeting of γδ T-cells. Indeed, several drugs already in clinical use, including vedolizumab, infliximab, and azathioprine, likely owe their efficacy in part to modulation of γδ T-cell function. Recent clinical trials of Vδ2+ T-cell-selective treatments indicate a good safety profile in human patients, and efficacy is set to increase as more potent/targeted drugs continue to be developed. Key advances will include identifying methods of directing γδ T-cell recruitment to specific tissues to enhance host protection against invading pathogens, or alternatively, retaining these cells in the circulation to limit peripheral inflammation and/or improve responses to blood malignancies. Human γδ T-cell control of mucosal immunity is likely exerted via multiple mechanisms that induce diverse responses in other types of tissue-resident leukocytes. Understanding the microenvironmental signals that regulate these functions will be critical to the development of new γδ T-cell-based therapies.
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Affiliation(s)
- Neil E. McCarthy
- Centre for Immunobiology, Bart’s and The London School of Medicine and Dentistry, The Blizard Institute, Queen Mary University of London, London, United Kingdom
| | - Matthias Eberl
- Division of Infection and Immunity, School of Medicine, Systems Immunity Research Institute, Cardiff University, Cardiff, United Kingdom
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Mirzaei HR, Mirzaei H, Lee SY, Hadjati J, Till BG. Prospects for chimeric antigen receptor (CAR) γδ T cells: A potential game changer for adoptive T cell cancer immunotherapy. Cancer Lett 2016; 380:413-423. [PMID: 27392648 PMCID: PMC5003697 DOI: 10.1016/j.canlet.2016.07.001] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 06/29/2016] [Accepted: 07/01/2016] [Indexed: 12/20/2022]
Abstract
Excitement is growing for therapies that harness the power of patients' immune systems to combat their diseases. One approach to immunotherapy involves engineering patients' own T cells to express a chimeric antigen receptor (CAR) to treat advanced cancers, particularly those refractory to conventional therapeutic agents. Although these engineered immune cells have made remarkable strides in the treatment of patients with certain hematologic malignancies, success with solid tumors has been limited, probably due to immunosuppressive mechanisms in the tumor niche. In nearly all studies to date, T cells bearing αβ receptors have been used to generate CAR T cells. In this review, we highlight biological characteristics of γδ T cells that are distinct from those of αβ T cells, including homing to epithelial and mucosal tissues and unique functions such as direct antigen recognition, lack of alloreactivity, and ability to present antigens. We offer our perspective that these features make γδ T cells promising for use in cellular therapy against several types of solid tumors, including melanoma and gastrointestinal cancers. Engineered γδ T cells should be considered as a new platform for adoptive T cell cancer therapy for mucosal tumors.
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MESH Headings
- Animals
- Genes, T-Cell Receptor delta
- Genes, T-Cell Receptor gamma
- Genetic Therapy/methods
- Humans
- Immunotherapy, Adoptive/methods
- Lymphocytes, Tumor-Infiltrating/immunology
- Lymphocytes, Tumor-Infiltrating/metabolism
- Lymphocytes, Tumor-Infiltrating/transplantation
- Neoplasms/genetics
- Neoplasms/metabolism
- Neoplasms/pathology
- Neoplasms/therapy
- Phenotype
- Receptors, Antigen, T-Cell, gamma-delta/biosynthesis
- Receptors, Antigen, T-Cell, gamma-delta/genetics
- Receptors, Antigen, T-Cell, gamma-delta/immunology
- Recombinant Fusion Proteins/biosynthesis
- Recombinant Fusion Proteins/immunology
- T-Lymphocytes/immunology
- T-Lymphocytes/metabolism
- T-Lymphocytes/transplantation
- Tumor Microenvironment
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Affiliation(s)
- Hamid Reza Mirzaei
- Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran; Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Hamed Mirzaei
- Department of Medical Biotechnology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Sang Yun Lee
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Jamshid Hadjati
- Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran; Cancer Biology Research Center, Tehran University of Medical Sciences, Tehran, Iran.
| | - Brian G Till
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA.
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Divergent Isoprenoid Biosynthesis Pathways in Staphylococcus Species Constitute a Drug Target for Treating Infections in Companion Animals. mSphere 2016; 1:mSphere00258-16. [PMID: 27704053 PMCID: PMC5040788 DOI: 10.1128/msphere.00258-16] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 09/06/2016] [Indexed: 11/20/2022] Open
Abstract
Drug-resistant Staphylococcus species are a major concern in human and veterinary medicine. There is a need for new antibiotics that exhibit a selective effect in treating infections in companion and livestock animals and that would not be used to treat human bacterial infections. We have identified fosmidomycin as an antibiotic that selectively targets certain Staphylococcus species that are often encountered in skin infections in cats and dogs. These findings expand our understanding of Staphylococcus evolution and may have direct implications for treating staphylococcal infections in veterinary medicine. Staphylococcus species are a leading cause of skin and soft tissue infections in humans and animals, and the antibiotics used to treat these infections are often the same. Methicillin- and multidrug-resistant staphylococcal infections are becoming more common in human and veterinary medicine. From a “One Health” perspective, this overlap in antibiotic use and resistance raises concerns over the potential spread of antibiotic resistance genes. Whole-genome sequencing and comparative genomics analysis revealed that Staphylococcus species use divergent pathways to synthesize isoprenoids. Species frequently associated with skin and soft tissue infections in companion animals, including S. schleiferi and S. pseudintermedius, use the nonmevalonate pathway. In contrast, S. aureus, S. epidermidis, and S. lugdunensis use the mevalonate pathway. The antibiotic fosmidomycin, an inhibitor of the nonmevalonate pathway, was effective in killing canine clinical staphylococcal isolates but had no effect on the growth or survival of S. aureus and S. epidermidis. These data identify an essential metabolic pathway in Staphylococcus that differs among members of this genus and suggest that drugs such as fosmidomycin, which targets enzymes in the nonmevalonate pathway, may be an effective treatment for certain staphylococcal infections. IMPORTANCE Drug-resistant Staphylococcus species are a major concern in human and veterinary medicine. There is a need for new antibiotics that exhibit a selective effect in treating infections in companion and livestock animals and that would not be used to treat human bacterial infections. We have identified fosmidomycin as an antibiotic that selectively targets certain Staphylococcus species that are often encountered in skin infections in cats and dogs. These findings expand our understanding of Staphylococcus evolution and may have direct implications for treating staphylococcal infections in veterinary medicine.
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A Subset of Protective γ9δ2 T Cells Is Activated by Novel Mycobacterial Glycolipid Components. Infect Immun 2016; 84:2449-62. [PMID: 27297390 PMCID: PMC4995917 DOI: 10.1128/iai.01322-15] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Accepted: 06/07/2016] [Indexed: 01/28/2023] Open
Abstract
γ9δ2 T cells provide a natural bridge between innate and adaptive immunity, rapidly and potently respond to pathogen infection in mucosal tissues, and are prominently induced by both tuberculosis (TB) infection and bacillus Calmette Guérin (BCG) vaccination. Mycobacterium-expanded γ9δ2 T cells represent only a subset of the phosphoantigen {isopentenyl pyrophosphate [IPP] and (E)-4-hydroxy-3-methyl-but-2-enylpyrophosphate [HMBPP]}-responsive γ9δ2 T cells, expressing an oligoclonal set of T cell receptor (TCR) sequences which more efficiently recognize and inhibit intracellular Mycobacterium tuberculosis infection. Based on this premise, we have been searching for M. tuberculosis antigens specifically capable of inducing a unique subset of mycobacterium-protective γ9δ2 T cells. Our screening strategy includes the identification of M. tuberculosis fractions that expand γ9δ2 T cells with biological functions capable of inhibiting intracellular mycobacterial replication. Chemical treatments of M. tuberculosis whole-cell lysates (MtbWL) ruled out protein, nucleic acid, and nonpolar lipids as the M. tuberculosis antigens inducing protective γ9δ2 T cells. Mild acid hydrolysis, which transforms complex carbohydrate to monomeric residues, abrogated the specific activity of M. tuberculosis whole-cell lysates, suggesting that a polysaccharide was required for biological activity. Extraction of MtbWL with chloroform-methanol-water (10:10:3) resulted in a polar lipid fraction with highly enriched specific activity; this activity was further enriched by silica gel chromatography. A combination of mass spectrometry and nuclear magnetic resonance analysis of bioactive fractions indicated that 6-O-methylglucose-containing lipopolysaccharides (mGLP) are predominant components present in this active fraction. These results have important implications for the development of new immunotherapeutic approaches for prevention and treatment of TB.
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23
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Chen ZW. Protective immune responses of major Vγ2Vδ2 T-cell subset in M. tuberculosis infection. Curr Opin Immunol 2016; 42:105-112. [PMID: 27491008 DOI: 10.1016/j.coi.2016.06.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Revised: 06/03/2016] [Accepted: 06/12/2016] [Indexed: 01/09/2023]
Abstract
Recent observation that prenyl pyrophosphates bind the Ig superfamily protein butyrophilin 3A1 (BTN3A1) suggests that modifying BTN3A1 activates major γδ T-cell subset, Vγ2Vδ2 T cells. Studies also show that microbial phosphoantigen HMBPP is required for expansion, pulmonary response, effector functions and memory polarization of Vγ2Vδ2 T cells during infections. Broad repertoires of cytokines involve expansion, recall-like expansion and effector functions of Vγ2Vδ2 T cells after Mtb infection or vaccination. Finally, mechanistic studies in nonhuman primate TB model demonstrate early expansion and differentiation of Vγ2Vδ2 T cells during Mtb infection can increase immune resistance to TB in macaques, with a potential mechanism of early/sustained IFN-γ production and CTL killing.
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Affiliation(s)
- Zheng W Chen
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine Chicago, 909 South Wolcott Avenue, MC790, E704, Chicago, IL 60612, United States.
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24
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Gao Y, Zhang S, Ou Q, Shen L, Wang S, Wu J, Weng X, Chen ZW, Zhang W, Shao L. Characterization of CD4/CD8+ αβ and Vγ2Vδ2+ T cells in HIV-negative individuals with different Mycobacterium tuberculosis infection statuses. Hum Immunol 2015; 76:801-7. [PMID: 26429305 DOI: 10.1016/j.humimm.2015.09.039] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Revised: 07/24/2015] [Accepted: 09/26/2015] [Indexed: 12/24/2022]
Abstract
BACKGROUND The immune responses of T cell subsets among patients with different Mycobacterium tuberculosis (M.tb) infection statuses [i.e., active tuberculosis (ATB), latent tuberculosis infection (LTBI) and non-infection (healthy control, HC)] have not been fully elucidated in HIV-negative individuals. Specifically, data are limiting in high tuberculosis epidemic regions in China. To investigate the distributions and functions of T cell subsets (i.e., CD3+, CD4+, CD8+ αβ and Vγ2Vδ2+ T cells) in HIV-negative subjects with different M.tb infection statuses, we conducted a case-control study that enrolled 125 participants, including ATB patients (n = 46), LTBI subjects (n = 34), and HC (n = 45). RESULTS An IFN-γ release assay (IGRA) was employed to screen LTBI subjects. Whole blood cell surface staining and flow cytometry were used to detect phenotypic distributions of T cells in the peripheral blood mononuclear cells (PBMCs) and tuberculous pleural fluid mononuclear cells (PFMCs). PPD and the phosphorylated antigen HMBPP were employed as stimulators for the detection of M.tb antigen-specific T cell functions via intracellular cytokine staining (ICS). The absolute numbers of T cell subsets, including CD3+ CD4+, CD3+ CD8+ αβ and Vγ2Vδ2+ T cells, were significantly reduced in active tuberculosis compared with latent tuberculosis or the healthy controls. Importantly, PPD-specific CD3+ CD4+ and CD3+ CD8+ αβ T cells and HMBPP-specific Vγ2Vδ2+ T cells in ATB patients were also significantly reduced compared to the LTBI/HC subjects (P<0.05). In contrast, the proportion of CD4+ T cells in PFMCs was higher compared to PBMCs, while CD8+ and Vγ2Vδ2+ T cells in PFMCs were lower compared to PBMCs (all P < 0.05). PPD-specific CD4+ T cells predominated among CD3+ T cells in PFMCs. CONCLUSIONS Cellular immune responses are impaired in ATB patients. Antigen-specific CD4+ T cell may migrate from the periphery to the lesion site, where they exert anti-tuberculosis functions.
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Affiliation(s)
- Yan Gao
- Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai 200040, China.
| | - Shu Zhang
- Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai 200040, China.
| | - Qinfang Ou
- Department of Pulmonary Diseases, Wuxi No. 5 People's Hospital, Wuxi 214005, China.
| | - Lei Shen
- Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai 200040, China.
| | - Sen Wang
- Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai 200040, China.
| | - Jing Wu
- Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai 200040, China.
| | - Xinhua Weng
- Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai 200040, China.
| | - Zheng W Chen
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, 835 S. Wolcott Avenue, MC790 Chicago, IL 60612, United States.
| | - Wenhong Zhang
- Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai 200040, China.
| | - Lingyun Shao
- Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai 200040, China.
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25
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McCarthy NE, Hedin CR, Sanders TJ, Amon P, Hoti I, Ayada I, Baji V, Giles EM, Wildemann M, Bashir Z, Whelan K, Sanderson I, Lindsay JO, Stagg AJ. Azathioprine therapy selectively ablates human Vδ2⁺ T cells in Crohn's disease. J Clin Invest 2015; 125:3215-25. [PMID: 26168223 DOI: 10.1172/jci80840] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Accepted: 05/28/2015] [Indexed: 12/16/2022] Open
Abstract
Tumor-derived and bacterial phosphoantigens are recognized by unconventional lymphocytes that express a Vγ9Vδ2 T cell receptor (Vδ2 T cells) and mediate host protection against microbial infections and malignancies. Vδ2 T cells are absent in rodents but readily populate the human intestine, where their function is largely unknown. Here, we assessed Vδ2 T cell phenotype and function by flow cytometry in blood and intestinal tissue from Crohn's disease patients (CD patients) and healthy controls. Blood from CD patients included an increased percentage of gut-tropic integrin β7-expressing Vδ2 T cells, while "Th1-committed" CD27-expressing Vδ2 T cells were selectively depleted. A corresponding population of CD27+ Vδ2 T cells was present in mucosal biopsies from CD patients and produced elevated levels of TNFα compared with controls. In colonic mucosa from CD patients, Vδ2 T cell production of TNFα was reduced by pharmacological blockade of retinoic acid receptor-α (RARα) signaling, indicating that dietary vitamin metabolites can influence Vδ2 T cell function in inflamed intestine. Vδ2 T cells were ablated in blood and tissue from CD patients receiving azathioprine (AZA) therapy, and posttreatment Vδ2 T cell recovery correlated with time since drug withdrawal and inversely correlated with patient age. These results indicate that human Vδ2 T cells exert proinflammatory effects in CD that are modified by dietary vitamin metabolites and ablated by AZA therapy, which may help resolve intestinal inflammation but could increase malignancy risk by impairing systemic tumor surveillance.
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26
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Shen H, Wang Y, Chen CY, Frencher J, Huang D, Yang E, Ryan-Payseur B, Chen ZW. Th17-related cytokines contribute to recall-like expansion/effector function of HMBPP-specific Vγ2Vδ2 T cells after Mycobacterium tuberculosis infection or vaccination. Eur J Immunol 2015; 45:442-51. [PMID: 25141829 PMCID: PMC4916493 DOI: 10.1002/eji.201444635] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Revised: 06/24/2014] [Accepted: 08/13/2014] [Indexed: 11/12/2022]
Abstract
Whether cytokines can influence the adaptive immune response by antigen-specific γδ T cells during infections or vaccinations remains unknown. We previously demonstrated that, during BCG/Mycobacterium tuberculosis (Mtb) infections, Th17-related cytokines markedly upregulated when phosphoantigen-specific Vγ2Vδ2 T cells expanded. In this study, we examined the involvement of Th17-related cytokines in the recall-like responses of Vγ2Vδ2 T cells following Mtb infection or vaccination against TB. Treatment with IL-17A/IL-17F or IL-22 expanded phosphoantigen 4-hydroxy-3-methyl-but-enyl pyrophosphate (HMBPP)-stimulated Vγ2Vδ2 T cells from BCG-vaccinated macaques but not from naïve animals, and IL-23 induced greater expansion than the other Th17-related cytokines. Consistently, Mtb infection of macaques also enhanced the ability of IL-17/IL-22 or IL-23 to expand HMBPP-stimulated Vγ2Vδ2 T cells. When evaluating IL-23 signaling as a prototype, we found that HMBPP/IL-23-expanded Vγ2Vδ2 T cells from macaques infected with Mtb or vaccinated with BCG or Listeria ΔactA prfA*-ESAT6/Ag85B produced IL-17, IL-22, IL-2, and IFN-γ. Interestingly, HMBPP/IL-23-induced production of IFN-γ in turn facilitated IL-23-induced expansion of HMBPP-activated Vγ2Vδ2 T cells. Furthermore, HMBPP/IL-23-induced proliferation of Vγ2Vδ2 T cells appeared to require APC contact and involve the conventional and novel protein kinase C signaling pathways. These findings suggest that Th17-related cytokines can contribute to recall-like expansion and effector function of Ag-specific γδ T cells after infection or vaccination.
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Affiliation(s)
- Hongbo Shen
- Chinese Academy of Science, Institut Pasteur of Shanghai, Shanghai, China
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, IL, USA
| | - Yunqi Wang
- Department of Immunology, University of North Carolina, NC, USA
| | - Crystal Y. Chen
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, IL, USA
| | - James Frencher
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, IL, USA
| | - Dan Huang
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, IL, USA
| | - Enzhuo Yang
- Chinese Academy of Science, Institut Pasteur of Shanghai, Shanghai, China
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, IL, USA
| | - Bridgett Ryan-Payseur
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, IL, USA
| | - Zheng W. Chen
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, IL, USA
- Institut Pasteur of Shanghai, Shanghai, China
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27
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Karunakaran MM, Herrmann T. The Vγ9Vδ2 T Cell Antigen Receptor and Butyrophilin-3 A1: Models of Interaction, the Possibility of Co-Evolution, and the Case of Dendritic Epidermal T Cells. Front Immunol 2014; 5:648. [PMID: 25566259 PMCID: PMC4271611 DOI: 10.3389/fimmu.2014.00648] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 12/04/2014] [Indexed: 01/18/2023] Open
Abstract
Most circulating human gamma delta T cells are Vγ9Vδ2 T cells. Their hallmark is the expression of T cell antigen receptors (TCR) whose γ-chains show a Vγ9-JP (Vγ2-Jγ1.2) rearrangement and are paired with Vδ2-containing δ-chains, a dominant TCR configuration, which until recently seemed to occur in primates only. Vγ9Vδ2 T cells respond to phosphoantigens (PAg) such as (E)-4-Hydroxy-3-methyl-but-2-enyl pyrophosphate (HMBPP), which is produced by many pathogens and isopentenyl pyrophosphate (IPP), which accumulates in certain tumors or cells treated with aminobisphosphonates such as zoledronate. A prerequisite for PAg-induced activation is the contact of Vγ9Vδ2 T cells with cells expressing butyrophilin-3 A1 (BTN3A1). We will first critically review models of how BTN3 might act in PAg-mediated Vγ9Vδ2 T cell activation and then address putative co-evolution of Vγ9, Vδ2, and BTN3 genes. In those rodent and lagomorphs used as animal models, all three genes are lost but a data-base analysis showed that they emerged together with placental mammals. A strong concomitant conservation of functional Vγ9, Vδ2, and BTN3 genes in other species suggests co-evolution of these three genes. A detailed analysis was performed for the new world camelid alpaca (Vicugna pacos). It provides an excellent candidate for a non-primate species with presumably functional Vγ9Vδ2 T cells since TCR rearrangements share features characteristic for PAg-reactive primate Vγ9Vδ2 TCR and proposed PAg-binding sites of BTN3A1 have been conserved. Finally, we analyze the possible functional relationship between the butyrophilin-family member Skint1 and the γδ TCR-V genes used by murine dendritic epithelial T cells (DETC). Among placental mammals, we identify five rodents, the cow, a bat, and the cape golden mole as the only species concomitantly possessing potentially functional homologs of murine Vγ3, Vδ4 genes, and Skint1 gene and suggest to search for DETC like cells in these species.
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Affiliation(s)
- Mohindar M Karunakaran
- Department of Medicine, Institute for Virology and Immunobiology, University of Würzburg , Würzburg , Germany
| | - Thomas Herrmann
- Department of Medicine, Institute for Virology and Immunobiology, University of Würzburg , Würzburg , Germany
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28
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Frencher JT, Shen H, Yan L, Wilson JO, Freitag NE, Rizzo AN, Chen CY, Chen ZW. HMBPP-deficient Listeria mutant immunization alters pulmonary/systemic responses, effector functions, and memory polarization of Vγ2Vδ2 T cells. J Leukoc Biol 2014; 96:957-67. [PMID: 25114162 DOI: 10.1189/jlb.6hi1213-632r] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Whereas infection or immunization of humans/primates with microbes coproducing HMBPP/IPP can remarkably activate Vγ2Vδ2 T cells, in vivo studies have not been done to dissect HMBPP- and IPP-driven expansion, pulmonary trafficking, effector functions, and memory polarization of Vγ2Vδ2 T cells. We define these phosphoantigen-host interplays by comparative immunizations of macaques with the HMBPP/IPP-coproducing Listeria ΔactA prfA* and HMBPP-deficient Listeria ΔactA ΔGCPE: prfA* mutant. The HMBPP-deficient ΔGCPE: mutant shows lower ability to expand Vγ2Vδ2 T cells in vitro than the parental HMBPP-producing strain but displays comparably attenuated infectivity or immunogenicity. Respiratory immunization of macaques with the HMBPP-deficient mutant elicits lower pulmonary and systemic responses of Vγ2Vδ2 T cells compared with the HMBPP-producing vaccine strain. Interestingly, HMBPP-deficient mutant reimmunization or boosting elicits enhanced responses of Vγ2Vδ2 T cells, but the magnitude is lower than that by HMBPP-producing listeria. HMBPP-deficient listeria differentiated fewer Vγ2Vδ2 T effector cells capable of coproducing IFN-γ and TNF-α and inhibiting intracellular listeria than HMBPP-producing listeria. Furthermore, HMBPP deficiency in listerial immunization influences memory polarization of Vγ2Vδ2 T cells. Thus, both HMBPP and IPP production in listerial immunization or infection elicit systemic/pulmonary responses and differentiation of Vγ2Vδ2 T cells, but a role for HMBPP is more dominant. Findings may help devise immune intervention.
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Affiliation(s)
- James T Frencher
- Microbiology and Immunology and Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, Illinois, USA
| | - Hongbo Shen
- Microbiology and Immunology and Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, Illinois, USA
| | - Lin Yan
- Microbiology and Immunology and Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, Illinois, USA
| | | | | | | | - Crystal Y Chen
- Microbiology and Immunology and Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, Illinois, USA
| | - Zheng W Chen
- Microbiology and Immunology and Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, Illinois, USA
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29
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Laurent AJ, Bindslev N, Johansson B, Berg L. Synergistic effects of ethanol and isopentenyl pyrophosphate on expansion of γδ T cells in synovial fluid from patients with arthritis. PLoS One 2014; 9:e103683. [PMID: 25090614 PMCID: PMC4121167 DOI: 10.1371/journal.pone.0103683] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Accepted: 04/29/2014] [Indexed: 01/03/2023] Open
Abstract
Low to moderate ethanol consumption has been associated with protective effects in autoimmune diseases such as rheumatoid arthritis, RA. An expansion of γδ T cells induced by isopentenyl pyrophosphate, IPP, likewise seems to have a protective role in arthritis. The aim of this project was to test the hypothesis that low doses of ethanol can enhance IPP-induced expansion of synovial fluid γδ T cells from patients with arthritis and may thereby potentially account for the beneficial effects of ethanol on symptoms of the arthritic process. Thus, mononuclear cells from synovial fluid (SF) from 15 patients with arthritis and from peripheral blood (PB) from 15 healthy donors were stimulated with low concentrations of ethanol and IPP for 7 days in vitro. IPP in combination with ethanol 0.015%, 2.5 mM, equivalent to the decrease per hour in blood ethanol concentration due to metabolism, gave a significantly higher fractional expansion of SF γδ T cells compared with IPP alone after 7 days (ratio 10.1+/-4.0, p<0.0008, n = 12) in patients with arthritis. Similar results were obtained for PB γδ T cells from healthy controls (ratio 2.0+/-0.4, p<0.011, n = 15). The augmented expansion of γδ T cells in SF is explained by a higher proliferation (p = 0.0034, n = 11) and an increased survival (p<0.005, n = 11) in SF cultures stimulated with IPP plus ethanol compared to IPP alone. The synergistic effects of IPP and ethanol indicate a possible allosteric effect of ethanol. Similar effects could be seen when stimulating PB with ethanol in presence of risedronate, which has the ability to increase endogenous levels of IPP. We conclude that expansion of γδ T cells by combinatorial drug effects, possibly in fixed-dose combination, FDC, of ethanol in the presence of IPP might give a protective role in diseases such as arthritis.
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MESH Headings
- Adult
- Aged
- Arthritis, Rheumatoid/drug therapy
- Arthritis, Rheumatoid/immunology
- Arthritis, Rheumatoid/pathology
- Cell Proliferation/drug effects
- Cell Survival/drug effects
- Drug Synergism
- Ethanol/pharmacology
- Etidronic Acid/analogs & derivatives
- Etidronic Acid/pharmacology
- Etidronic Acid/therapeutic use
- Female
- Hemiterpenes/pharmacology
- Humans
- Interferon-gamma/biosynthesis
- Lymphocyte Activation/drug effects
- Male
- Middle Aged
- Models, Biological
- Organophosphorus Compounds/pharmacology
- Phenotype
- Receptors, Antigen, T-Cell, alpha-beta/metabolism
- Receptors, Antigen, T-Cell, gamma-delta/metabolism
- Risedronic Acid
- Synovial Fluid/cytology
- Synovial Fluid/drug effects
- Synovial Fluid/immunology
- T-Lymphocyte Subsets/drug effects
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Affiliation(s)
- Agneta J. Laurent
- Rheumatology Unit, Department of Medicine, Karolinska Institutet, Stockholm, Sweden
- Neurogenetics Unit, Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
- * E-mail:
| | - Niels Bindslev
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Björn Johansson
- Neurogenetics Unit, Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - Louise Berg
- Rheumatology Unit, Department of Medicine, Karolinska Institutet, Stockholm, Sweden
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30
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Workalemahu G, Wang H, Puan KJ, Nada MH, Kuzuyama T, Jones BD, Jin C, Morita CT. Metabolic engineering of Salmonella vaccine bacteria to boost human Vγ2Vδ2 T cell immunity. THE JOURNAL OF IMMUNOLOGY 2014; 193:708-21. [PMID: 24943221 DOI: 10.4049/jimmunol.1302746] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Human Vγ2Vδ2 T cells monitor isoprenoid metabolism by recognizing foreign (E)-4-hydroxy-3-methyl-but-2-enyl pyrophosphate (HMBPP), a metabolite in the 2-C-methyl-D-erythritol-4-phosphate pathway used by most eubacteria and apicomplexan parasites, and self isopentenyl pyrophosphate, a metabolite in the mevalonate pathway used by humans. Whereas microbial infections elicit prolonged expansion of memory Vγ2Vδ2 T cells, immunization with prenyl pyrophosphates or aminobisphosphonates elicit short-term Vγ2Vδ2 expansion with rapid anergy and deletion upon subsequent immunizations. We hypothesized that a live, attenuated bacterial vaccine that overproduces HMBPP would elicit long-lasting Vγ2Vδ2 T cell immunity by mimicking a natural infection. Therefore, we metabolically engineered the avirulent aroA(-) Salmonella enterica serovar Typhimurium SL7207 strain by deleting the gene for LytB (the downstream enzyme from HMBPP) and functionally complementing for this loss with genes encoding mevalonate pathway enzymes. LytB(-) Salmonella SL7207 had high HMBPP levels, infected human cells as efficiently as did the wild-type bacteria, and stimulated large ex vivo expansions of Vγ2Vδ2 T cells from human donors. Importantly, vaccination of a rhesus monkey with live lytB(-) Salmonella SL7207 stimulated a prolonged expansion of Vγ2Vδ2 T cells without significant side effects or anergy induction. These studies provide proof-of-principle that metabolic engineering can be used to derive live bacterial vaccines that boost Vγ2Vδ2 T cell immunity. Similar engineering of metabolic pathways to produce lipid Ags or B vitamin metabolite Ags could be used to derive live bacterial vaccine for other unconventional T cells that recognize nonpeptide Ags.
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Affiliation(s)
- Grefachew Workalemahu
- Division of Immunology, Department of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, IA 52242; Department of Veterans Affairs, Iowa City Health Care System, Iowa City, IA 52246
| | - Hong Wang
- Division of Immunology, Department of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, IA 52242; Department of Veterans Affairs, Iowa City Health Care System, Iowa City, IA 52246
| | - Kia-Joo Puan
- Division of Immunology, Department of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, IA 52242; Singapore Immunology Network, Agency for Science, Technology and Research, Singapore 138648
| | - Mohanad H Nada
- Division of Immunology, Department of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, IA 52242; Department of Veterans Affairs, Iowa City Health Care System, Iowa City, IA 52246; Interdisciplinary Graduate Program in Immunology, University of Iowa Carver College of Medicine, Iowa City, IA 52242
| | - Tomohisa Kuzuyama
- Biotechnology Research Center, The University of Tokyo, Tokyo 113-8657, Japan
| | - Bradley D Jones
- Department of Microbiology, University of Iowa Carver College of Medicine, Iowa City, IA 52242; Interdisciplinary Graduate Program in Genetics, University of Iowa Carver College of Medicine, Iowa City, IA 52242; and Inflammation Program, University of Iowa Carver College of Medicine, Iowa City, IA 52242
| | - Chenggang Jin
- Division of Immunology, Department of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, IA 52242; Department of Veterans Affairs, Iowa City Health Care System, Iowa City, IA 52246
| | - Craig T Morita
- Division of Immunology, Department of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, IA 52242; Department of Veterans Affairs, Iowa City Health Care System, Iowa City, IA 52246; Interdisciplinary Graduate Program in Immunology, University of Iowa Carver College of Medicine, Iowa City, IA 52242;
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31
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The role of the γ δ T cell in allergic diseases. J Immunol Res 2014; 2014:963484. [PMID: 24995350 PMCID: PMC4065764 DOI: 10.1155/2014/963484] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2014] [Accepted: 05/11/2014] [Indexed: 11/17/2022] Open
Abstract
The predominant distribution of γδ T cells in the mucosal and epithelial tissues makes these unconventional lymphocytes the “guards” to contact external environment (like allergens) and to contribute to immune surveillance, as well as “vanguards” to participate in initiating mucosal inflammation. Therefore, γδ T cells have been considered to bridge the innate and adaptive immunity. The role these cells play in allergy seems to be complicated and meaningful, so it makes sense to review the characteristics and role of γδ T cells in allergic diseases.
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32
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Wiemer DF, Wiemer AJ. Opportunities and challenges in development of phosphoantigens as Vγ9Vδ2 T cell agonists. Biochem Pharmacol 2014; 89:301-12. [DOI: 10.1016/j.bcp.2014.03.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Revised: 03/17/2014] [Accepted: 03/17/2014] [Indexed: 01/29/2023]
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33
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Laws TR, Nelson M, Bonnafous C, Sicard H, Taylor C, Salguero FJ, Atkins TP, Oyston PCF, Rowland CA. In vivo manipulation of γ9(+) T cells in the common marmoset (Callithrix Jacchus) with phosphoantigen and effect on the progression of respiratory melioidosis. PLoS One 2013; 8:e74789. [PMID: 24098670 PMCID: PMC3786980 DOI: 10.1371/journal.pone.0074789] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Accepted: 08/06/2013] [Indexed: 11/18/2022] Open
Abstract
Burkholderia pseudomallei is a dangerous human pathogen. Phosphoantigens specifically the target primate specific γ9(+)δ2(+) T cells subset and some have been developed as potential immunotherapeutics. Previously, we demonstrated that, when stimulated with the phosphoantigen CHDMAPP, γ9(+)δ2(+) T cells aid in the killing of intracellular B. pseudomallei bacteria. Moreover, we found that common marmoset (Callithrix Jacchus) γ9(+) T cells increase in frequency and respond to the phosphoantigen CHDMAPP and/or B. pseudomallei, in combination with IL-2, in a similar manner to human γ9(+)δ2(+) T cells. Here we evaluate the efficacy of the phosphoantigen CHDMAPP, in combination with IL-2, as a therapy against B. pseudomallei infection, in vivo. We found that the previous studies predicted the in vivo responsiveness of γ9(+) T cells to the CHDMAPP+IL-2 treatment and significant expansion of the numbers of peripheral and splenic γ9(+) T cells were observed. This effect was similar to those reported in other primate species treated with phosphoantigen. Furthermore, splenocytes were retrieved 7 days post onset of treatment, restimulated with CHDMAPP or heat-killed B. pseudomallei and the cultured γ9(+) T cells demonstrated no reduction in IFN-γ response when CHDMAPP+IL-2 animals were compared to IL-2 only treated animals. Using an established model of B. pseudomallei infection in the marmoset, we assessed the potential for using phosphoantigen as a novel immunotherapy. The CHDMAPP treatment regime had no effect on the progression of respiratory melioidosis and this was despite the presence of elevated numbers of γ9(+) T cells in the spleen, liver and lung and an increased proportion of IFN-γ(+) cells in response to infection. We therefore report that the common marmoset has proven a good model for studying the effect in vivo of γ9(+) T cell stimulation; however, γ9(+) T cells have little or no effect on the progression of lethal, respiratory B. pseudomallei infection.
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Affiliation(s)
- Thomas R. Laws
- Biomedical Sciences Dept, Defence Science and Technology laboratory (DSTL) Porton Down, Salisbury, United Kingdom
| | - Michelle Nelson
- Biomedical Sciences Dept, Defence Science and Technology laboratory (DSTL) Porton Down, Salisbury, United Kingdom
| | | | | | - Christopher Taylor
- Biomedical Sciences Dept, Defence Science and Technology laboratory (DSTL) Porton Down, Salisbury, United Kingdom
| | | | - Timothy P. Atkins
- Biomedical Sciences Dept, Defence Science and Technology laboratory (DSTL) Porton Down, Salisbury, United Kingdom
| | - Petra C. F. Oyston
- Biomedical Sciences Dept, Defence Science and Technology laboratory (DSTL) Porton Down, Salisbury, United Kingdom
| | - Caroline A. Rowland
- Biomedical Sciences Dept, Defence Science and Technology laboratory (DSTL) Porton Down, Salisbury, United Kingdom
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34
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Chen CY, Yao S, Huang D, Wei H, Sicard H, Zeng G, Jomaa H, Larsen MH, Jacobs WR, Wang R, Letvin N, Shen Y, Qiu L, Shen L, Chen ZW. Phosphoantigen/IL2 expansion and differentiation of Vγ2Vδ2 T cells increase resistance to tuberculosis in nonhuman primates. PLoS Pathog 2013; 9:e1003501. [PMID: 23966854 PMCID: PMC3744401 DOI: 10.1371/journal.ppat.1003501] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Accepted: 05/31/2013] [Indexed: 01/11/2023] Open
Abstract
Dominant Vγ2Vδ2 T-cell subset exist only in primates, and recognize phosphoantigen from selected pathogens including M. tuberculosis(Mtb). In vivo function of Vγ2Vδ2 T cells in tuberculosis remains unknown. We conducted mechanistic studies to determine whether earlier expansion/differentiation of Vγ2Vδ2 T cells during Mtb infection could increase immune resistance to tuberculosis in macaques. Phosphoantigen/IL-2 administration specifically induced major expansion and pulmonary trafficking/accumulation of phosphoantigen-specific Vγ2Vδ2 T cells, significantly reduced Mtb burdens and attenuated tuberculosis lesions in lung tissues compared to saline/BSA or IL-2 controls. Expanded Vγ2Vδ2 T cells differentiated into multifunctional effector subpopulations capable of producing anti-TB cytokines IFNγ, perforin and granulysin, and co-producing perforin/granulysin in lung tissue. Mechanistically, perforin/granulysin-producing Vγ2Vδ2 T cells limited intracellular Mtb growth, and macaque granulysin had Mtb-bactericidal effect, and inhibited intracellular Mtb in presence of perforin. Furthermore, phosphoantigen/IL2-expanded Vγ2Vδ2 T effector cells produced IL-12, and their expansion/differentiation led to enhanced pulmonary responses of peptide-specific CD4+/CD8+ Th1-like cells. These results provide first in vivo evidence implicating that early expansion/differentiation of Vγ2Vδ2 T effector cells during Mtb infection increases resistance to tuberculosis. Thus, data support a rationale for conducting further studies of the γδ T-cell-targeted treatment of established TB, which might ultimately help explore single or adjunctive phosphoantigen expansion of Vγ2Vδ2 T-cell subset as intervention of MDR-tuberculosis or HIV-related tuberculosis. Tuberculosis(TB), caused by Mycobacterium tuberculosis(Mtb), remains a leading cause of morbidity and mortality worldwide. While CD4+/CD8+ T cells are protective, role of γδ T cells in TB and other infections remains unknown in humans. Vγ2Vδ2 T cells exist only in primates, represent a dominant circulating γδ T-cell subpopulation, and recognize phosphoantigen from Mtb and some selected pathogens. Here, we determined whether earlier expansion/differentiation of Vγ2Vδ2 T cells during Mtb infection increased resistance to TB in macaques. Phosphoantigen plus IL-2 administration induced expansion and pulmonary accumulation of Vγ2Vδ2 T cells, significantly reduced Mtb counts and attenuated TB lesions in lung tissues. Expanded Vγ2Vδ2 T cells produced anti-TB cytokines IFNγ, perforin and granulysin, and co-produced perforin and granulysin in lung tissue. Perforin/granulysin-co-producing Vγ2Vδ2 T cells limited intracellular Mtb growth, and macaque granulysin killed Mtb bacteria, and inhibited intracellular Mtb in presence of perforin. Furthermore, expansion of Vγ2Vδ2 T effectors enhanced pulmonary responses of peptide-specific CD4+/CD8+ T cells, which correlated with the ability of Vγ2Vδ2 T effector cells to produce IL-12. These results provide first evidence implicating a protective role of Vγ2Vδ2 T effector cells in TB, supporting a rationale to explore Vγ2Vδ2 T-cell-targeted treatment of drug-resistant TB or HIV-related TB.
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Affiliation(s)
- Crystal Y. Chen
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, Illinois, United States of America
| | - Shuyu Yao
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, Illinois, United States of America
- Herman B. Wells Center for Pediatric Research Indiana University, Indianapolis, Indiana, United States of America
| | - Dan Huang
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, Illinois, United States of America
| | - Huiyong Wei
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, Illinois, United States of America
| | | | - Gucheng Zeng
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, Illinois, United States of America
| | - Hassan Jomaa
- Institut für Klinische Chemie und Pathobiochemie, Justus-Liebig-Universität Giessen, Giessen, Germany
| | - Michelle H. Larsen
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, New York, New York, United States of America
| | - William R. Jacobs
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, New York, New York, United States of America
| | - Richard Wang
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, Illinois, United States of America
| | - Norman Letvin
- Harvard Medical School, Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
| | - Yun Shen
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, Illinois, United States of America
| | - Liyou Qiu
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, Illinois, United States of America
| | - Ling Shen
- Harvard Medical School, Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
| | - Zheng W. Chen
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, Illinois, United States of America
- * E-mail:
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35
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McCarthy NE, Bashir Z, Vossenkämper A, Hedin CR, Giles EM, Bhattacharjee S, Brown SG, Sanders TJ, Whelan K, MacDonald TT, Lindsay JO, Stagg AJ. Proinflammatory Vδ2+ T Cells Populate the Human Intestinal Mucosa and Enhance IFN-γ Production by Colonic αβ T Cells. THE JOURNAL OF IMMUNOLOGY 2013; 191:2752-63. [DOI: 10.4049/jimmunol.1202959] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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36
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El Daker S, Sacchi A, Montesano C, Altieri AM, Galluccio G, Colizzi V, Martini F, Martino A. An abnormal phenotype of lung Vγ9Vδ2 T cells impairs their responsiveness in tuberculosis patients. Cell Immunol 2013; 282:106-12. [PMID: 23770719 DOI: 10.1016/j.cellimm.2013.05.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Accepted: 05/02/2013] [Indexed: 01/27/2023]
Abstract
Antigen-specific γδ T cells represent an early innate defense known to play an important role in anti-mycobacterial immunity. We have investigated the immune functions of Vγ9Vδ2 T cells from Broncho-Alveolar lavages (BAC) samples of active TB patients. We observed that BAC Vγ9Vδ2 T cells presented a strong down-modulation of CD3 expression compared with Vγ9Vδ2 T cells from peripheral blood. Furthermore, Vγ9Vδ2 T cells mainly showed a central memory phenotype, expressed high levels of NK inhibitory receptors and TEMRA cells showed low expression of CD16 compared to circulating Vγ9Vδ2 T cells. Interestingly, the ability of BAC Vγ9Vδ2 T cells to respond to antigen stimulation was dramatically reduced, differently from blood counterpart. These observations indicate that γδ T cell functions are specifically impaired in situ by active TB, suggesting that the alveolar ambient during tuberculosis may affect resident γδ T cells in comparison to circulating cells.
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Affiliation(s)
- Sary El Daker
- Laboratory of Cellular Immunology, National Institute for Infectious Diseases Lazzaro Spallanzani, Rome, Italy.
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37
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Frencher JT, Ryan-Pasyeur BK, Huang D, Wang RC, McMullen PD, Letvin NL, Collins WE, Freitag NE, Malkovsky M, Chen CY, Shen L, Chen ZW. SHIV antigen immunization alters patterns of immune responses to SHIV/malaria coinfection and protects against life-threatening SHIV-related malaria. J Infect Dis 2013; 208:260-70. [PMID: 23568175 DOI: 10.1093/infdis/jit151] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Whether vaccination against a virus can protect against more virulent coinfection with the virus and additional pathogen(s) remains poorly characterized. Overlapping endemicity of human immunodeficiency virus (HIV) and malaria suggests that HIV/malaria coinfection frequently complicates acute and chronic HIV infection. Here we showed that vaccination of macaques with recombinant Listeria ΔactA prfA* expressing simian/human immunodeficiency virus (SHIV) gag and env elicited Gag- and Env-specific T-cell responses, and protected against life-threatening SHIV-related malaria after SHIV/Plasmodium fragile coinfection. SHIV antigen immunization reduced peak viremia, resisted SHIV/malaria-induced lymphoid destruction, and blunted coinfection-accelerated decline of CD4(+) T-cell counts after SHIV/malaria coinfection. SHIV antigen immunization also weakened coinfection-driven overreactive proinflammatory interferon-γ (IFNγ) responses and led to developing T helper cell 17/22 (Th17/Th22) responses after SHIV/malaria coinfection. The findings suggest that vaccination against AIDS virus can alter patterns of immune responses to the SHIV/malaria coinfection and protect against life-threatening SHIV-related malaria.
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Affiliation(s)
- James T Frencher
- Department of Microbiology and Immunology, University of Illinois College of Medicine, Chicago, Illinois, USA
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38
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Welton JL, Morgan MP, Martí S, Stone MD, Moser B, Sewell AK, Turton J, Eberl M. Monocytes and γδ T cells control the acute-phase response to intravenous zoledronate: insights from a phase IV safety trial. J Bone Miner Res 2013; 28:464-71. [PMID: 23074158 DOI: 10.1002/jbmr.1797] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2012] [Revised: 10/02/2012] [Accepted: 10/08/2012] [Indexed: 11/11/2022]
Abstract
Aminobisphosphonates (NBPs) are used widely against excessive bone resorption in osteoporosis and Paget's disease as well as in metastatic bone disease and multiple myeloma. Intravenous NBP administration often causes mild to severe acute-phase responses (APRs) that may require intervention with analgesics and antipyretics and lead to treatment noncompliance and nonadherence. We here undertook a phase IV safety trial in patients with osteoporosis to investigate the APR of otherwise healthy individuals to first-time intravenous treatment with the NBP zoledronate. This study provides unique insight into sterile acute inflammatory responses in vivo, in the absence of confounding factors such as infection or cancer. Our data show that both peripheral γδ T cells and monocytes become rapidly activated after treatment with zoledronate, which ultimately determines the clinical severity of the APR. Our study highlights a key role for IFN-γ in the zoledronate-induced APR and identifies pretreatment levels of monocytes and central/memory Vγ9/Vδ2 T cells as well as their responsiveness to zoledronate in vitro as predictive risk factors for the occurrence of subclinical and clinical symptoms. These findings have diagnostic and prognostic implications for patients with and without malignancy and are relevant for Vγ9/Vδ2 T-cell-based immunotherapy approaches.
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Affiliation(s)
- Joanne L Welton
- Cardiff Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
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39
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Rowland CA, Laws TR, Oyston PCF. An assessment of common marmoset (Callithrix jacchus) γ9(+) T cells and their response to phosphoantigen in vitro. Cell Immunol 2012; 280:132-7. [PMID: 23399838 DOI: 10.1016/j.cellimm.2012.12.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Revised: 10/10/2012] [Accepted: 12/04/2012] [Indexed: 11/25/2022]
Abstract
γ9δ2 T cells are a primate-specific γδ T cell subtype that expand and become activated during infection, responding directly to phosphoantigens which are by-products of essential metabolic pathways in both bacteria and mammals. Analogues of natural phosphoantigens have been developed as potential immunotherapeutics for treatment of tumours and infectious diseases. Several non-human primate models have been used in preclinical studies, however, little is known about marmoset γ9δ2 T cell responses. We identified γ9(+) T cells in various tissues in the marmoset and determined that these cells respond to phosphoantigen in a similar manner to human γ9δ2 T cells in vitro. Both human γ9δ2 T cells and marmoset γ9(+) T cells were able to reduce growth of the intracellular bacterium Burkholderia pseudomallei in vitro following expansion with phosphoantigen. This suggests that the marmoset is an appropriate model for examining the immunotherapeutic potential of compounds which target γ9δ2 T cells.
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40
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Chen ZW. Multifunctional immune responses of HMBPP-specific Vγ2Vδ2 T cells in M. tuberculosis and other infections. Cell Mol Immunol 2012; 10:58-64. [PMID: 23147720 DOI: 10.1038/cmi.2012.46] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Vγ2Vδ2 T (also known as Vγ9Vδ2 T) cells exist only in primates, and in humans represent a major γδ T-cell sub-population in the total population of circulating γδ T cells. Results from recent studies suggest that while (E)-4-hydroxy-3-methyl-but-2-enyl pyrophosphate (HMBPP) phosphoantigen from Mycobacterium tuberculosis (Mtb) and other microbes activates and expands primate Vγ2Vδ2 T cells, the Vγ2Vδ2 T-cell receptor (TCR) recognizes and binds to HMBPP on antigen-presenting cells (APC). In response to HMBPP stimulus, Vγ2Vδ2 TCRs array to form signaling-related nanoclusters or nanodomains during the activation of Vγ2Vδ2 T cells. Primary infections with HMBPP-producing pathogens drive the evolution of multieffector functional responses in Vγ2Vδ2 T cells, although Vγ2Vδ2 T cells display different patterns of responses during the acute and chronic phases of Mtb infection and in other infections. Expanded Vγ2Vδ2 T cells in primary Mtb infection can exhibit a broader TCR repertoire and a greater clonal response than previously assumed, with different distribution patterns of Vγ2Vδ2 T-cell clones in lymphoid and non-lymphoid compartments. Emerging in vivo data suggest that HMBPP activation of Vγ2Vδ2 T cells appears to impact other immune cells during infection.
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Affiliation(s)
- Zheng W Chen
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine Chicago, Chicago, IL 60612, USA.
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41
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Qiu Y, Chen J, Liao H, Zhang Y, Wang H, Li S, Luo Y, Fang D, Li G, Zhou B, Shen L, Chen CY, Huang D, Cai J, Cao K, Jiang L, Zeng G, Chen ZW. Tim-3-expressing CD4+ and CD8+ T cells in human tuberculosis (TB) exhibit polarized effector memory phenotypes and stronger anti-TB effector functions. PLoS Pathog 2012; 8:e1002984. [PMID: 23144609 PMCID: PMC3493466 DOI: 10.1371/journal.ppat.1002984] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2012] [Accepted: 09/07/2012] [Indexed: 12/30/2022] Open
Abstract
T-cell immune responses modulated by T-cell immunoglobulin and mucin domain-containing molecule 3 (Tim-3) during Mycobacterium tuberculosis (Mtb) infection in humans remain poorly understood. Here, we found that active TB patients exhibited increases in numbers of Tim-3-expressing CD4+ and CD8+ T cells, which preferentially displayed polarized effector memory phenotypes. Consistent with effector phenotypes, Tim-3+CD4+ and Tim-3+CD8+ T-cell subsets showed greater effector functions for producing Th1/Th22 cytokines and CTL effector molecules than Tim-3− counterparts, and Tim-3-expressing T cells more apparently limited intracellular Mtb replication in macrophages. The increased effector functions for Tim-3-expressing T cells consisted with cellular activation signaling as Tim-3+CD4+ and Tim-3+CD8+ T-cell subsets expressed much higher levels of phosphorylated signaling molecules p38, stat3, stat5, and Erk1/2 than Tim-3- controls. Mechanistic experiments showed that siRNA silencing of Tim-3 or soluble Tim-3 treatment interfering with membrane Tim-3-ligand interaction reduced de novo production of IFN-γ and TNF-α by Tim-3-expressing T cells. Furthermore, stimulation of Tim-3 signaling pathways by antibody cross-linking of membrane Tim-3 augmented effector function of IFN-γ production by CD4+ and CD8+ T cells, suggesting that Tim-3 signaling helped to drive stronger effector functions in active TB patients. This study therefore uncovered a previously unknown mechanism for T-cell immune responses regulated by Tim-3, and findings may have implications for potential immune intervention in TB. Tuberculosis (TB), an infectious disease caused by Mycobacterium tuberculosis (Mtb) infection, remains a leading cause of morbidity and mortality worldwide. While CD4+ and CD8+ T-cell effector functions producing Th1 or cytotoxic cytokines are required to mount anti-mycobacterial immunity, insufficiency or failure to mount anti-mycobacterial effector functions by CD4+ and CD8+ T cells may lead to impaired immunity against TB. Therefore, it is important to elucidate functional characteristics and regulatory pathways for Mtb-specific CD4+ and CD8+ T cells during immune responses to Mtb infection. It was postulated that T-cell immunoglobulin and mucin domain-containing molecule 3 (Tim-3) might represent a T-cell exhaustion marker, and expression of Tim-3 on T cells may be linked to progressive loss of secretion of cytokines. Thus, Tim-3 expression on T cells might correlate with T-cell dysfunction and disease pathogenic events. However, T-cell immune responses modulated by Tim-3 in human TB disease remain poorly understood. Here, we found that up-regulation of Tim-3 expression in active human TB disease allows CD4+ and CD8+ T cells to mount stronger, but not impaired, anti-mycobacterium effector functions. This study therefore uncovers a previously unknown mechanism for T-cell immune responses regulated by Tim-3, and has an important implication for TB diagnostics and therapy.
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Affiliation(s)
- Yueqin Qiu
- Department of Microbiology, Zhongshan School of Medicine, Key Laboratory for Tropical Diseases Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, China
- College of Life Sciences, Jinan University, Guangzhou, China
| | - Jianbo Chen
- Division of Infection and Immunity, Department for Clinical Microbiological Assays, Shenzhen Third People's Hospital, Shenzhen, China
| | - Hongying Liao
- Department of Thoracic Surgery, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yan Zhang
- Key Laboratory of Gene Engineering of the Ministry of Education, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Hua Wang
- Department of Oral and Maxillofacial Surgery, Hospital of Stomotology, Guanghua School of Stomotology, Sun Yat-sen University, Guangzhou, China
| | - Shaoyuan Li
- Department of Microbiology, Zhongshan School of Medicine, Key Laboratory for Tropical Diseases Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Yanfen Luo
- Department of Microbiology, Zhongshan School of Medicine, Key Laboratory for Tropical Diseases Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Danyun Fang
- Department of Microbiology, Zhongshan School of Medicine, Key Laboratory for Tropical Diseases Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Guobao Li
- Department of Pulmonary Diseases, Shenzhen Third People's Hospital, Shenzhen, China
| | - Boping Zhou
- Shenzhen Institute of Hepatology, Shenzhen Third People's Hospital, Shenzhen, China
| | - Ling Shen
- Harvard Medical School, Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
| | - Crystal Y. Chen
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, Illinois, United States of America
| | - Dan Huang
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, Illinois, United States of America
| | - Jiye Cai
- College of Life Sciences, Jinan University, Guangzhou, China
| | - Kaiyuan Cao
- Department of Microbiology, Zhongshan School of Medicine, Key Laboratory for Tropical Diseases Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Lifang Jiang
- Department of Microbiology, Zhongshan School of Medicine, Key Laboratory for Tropical Diseases Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Gucheng Zeng
- Department of Microbiology, Zhongshan School of Medicine, Key Laboratory for Tropical Diseases Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, China
- * E-mail:
| | - Zheng W. Chen
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, Illinois, United States of America
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Soriano-Sarabia N, Sandvold H, Jomaa H, Kubin T, Bein G, Hackstein H. Primary MHC-class II(+) cells are necessary to promote resting Vδ2 cell expansion in response to (E)-4-hydroxy-3-methyl-but-2-enyl-pyrophosphate and isopentenyl pyrophosphate. THE JOURNAL OF IMMUNOLOGY 2012; 189:5212-22. [PMID: 23105138 DOI: 10.4049/jimmunol.1200093] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Human Vγ9δ2 (Vδ2) T cells represent a unique effector T cell population in humans and primates detecting nonpeptid phosphoantigens, playing an important role in antimicrobial and antitumor immunity. Currently, it is believed that various leukocyte subsets can promote phosphoantigen-driven Vδ2 cell expansion, but the essential cell type required remains elusive. We have used high purity cell sorting to analyze the cellular requirements for (E)-4-hydroxy-3-methyl-but-2-enyl-pyrophosphate (HMBPP)-driven Vδ2 cell expansion. To our knowledge, we show for the first time that primary human MHC-class II(+) cells are indispensable for HMBPP- and isopentenylpyrophosphate-driven Vδ2 cell expansion. In contrast, MHC-class II(-) cells are unable to promote Vδ2 cell expansion. Moreover, purified primary human TCRαβ(+) T cells, CD4(+), or CD8(+) T cells also failed to promote HMBPP-mediated Vδ2 expansion. Depletion of CD4(+)CD25(+) T cells demonstrated that inability of TCRαβ(+) cells to expand Vδ2 cells was not related to the presence of regulatory T cells. Separation of MHC-class II(+) cells into dendritic cells, monocytes, and B cells revealed that dendritic cells were the most potent Vδ2 expanders. Pulsing experiments demonstrated that HMBPP transforms MHC-class II(+) but not negative cells into Vδ2 expanders. MHC-class II-blocking experiments with mAbs and secondary MHC-class II induction on CD4(+) T cells after CD3/CD28 costimulation indicated that MHC-class II is necessary, but not sufficient to promote Vδ2 expansion. Our results provide novel insight into the primary cell-specific requirements for human Vδ2 expansion.
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Affiliation(s)
- Natalia Soriano-Sarabia
- Institute for Clinical Immunology and Transfusion Medicine, Justus-Liebig University Giessen, Member of German Center for Lung Research, D-35390 Giessen, Germany
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Abstract
γδ-T cells represent a small population of immune cells, but play an indispensable role in host defenses against exogenous pathogens, immune surveillance of endogenous pathogenesis and even homeostasis of the immune system. Activation and expansion of γδ-T cells are generally observed in diverse human infectious diseases and correlate with their progression and prognosis. γδ-T cells have both 'innate' and 'adaptive' characteristics in the immune response, and their anti-infection activities are mediated by multiple pathways that are under elaborate regulation by other immune components. In this review, we summarize the current state of the literature and the recent advancements in γδ-T cell-mediated immune responses against common human infectious pathogens. Although further investigation is needed to improve our understanding of the characteristics of different γδ-T cell subpopulations under specific conditions, γδ-T cell-based therapy has great potential for the treatment of infectious diseases.
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Role of gamma-delta T-cells in cancer: another opening door to immunotherapy. Clin Transl Oncol 2012; 14:891-5. [PMID: 23054752 DOI: 10.1007/s12094-012-0935-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2012] [Accepted: 08/26/2012] [Indexed: 12/28/2022]
Abstract
The gamma-delta (γδ) T-cells are a subset of T-lymphocytes characterized by the presence of a surface antigen recognition complex type 2. Those γδ T-cells represent 2-5 % of peripheral T-cells only, but they are common in organs and mucosae, acting as a first defense system in the entries to the organism. The γδ T-cells take part on immune response by direct cytolysis, development of memory phenotypes, and modulation of immune cells, and they have been implied in autoimmune disorders, immune deficiencies, infections, and tumor diseases. We reported the role of γδ T-cells in oncology, focusing in their potential applications for cancer treatment. Experimental designs and clinical trials in the treatment of solid malignancies are extensively reviewed.
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Ryan-Payseur B, Frencher J, Shen L, Chen CY, Huang D, Chen ZW. Multieffector-functional immune responses of HMBPP-specific Vγ2Vδ2 T cells in nonhuman primates inoculated with Listeria monocytogenes ΔactA prfA*. THE JOURNAL OF IMMUNOLOGY 2012; 189:1285-93. [PMID: 22745375 DOI: 10.4049/jimmunol.1200641] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Although Listeria monocytogenes can induce systemic infection causing spontaneous abortion, septicemia, and meningitis, studies have not been performed to investigate human anti-L. monocytogenes immune responses, including those of Ag-specific Vγ2Vδ2 T cells, a dominant human γδ T cell subset. L. monocytogenes is the only pathogen known to possess both the mevalonate and non-mevalonate isoprenoid biosynthesis pathways that produce metabolic phosphates or phosphoantigens activating human Vγ2Vδ2 T cells, making it interesting to explore in vivo anti-L. monocytogenes immune responses of Vγ2Vδ2 T cells. In this study, we demonstrated that subclinical systemic L. monocytogenes infection of rhesus macaques via parenteral inoculation or vaccination with an attenuated Listeria strain induced multieffector-functional immune responses of phosphoantigen-specific Vγ2Vδ2 T cells. Subclinical systemic infection and reinfection with attenuated L. monocytogenes uncovered the ability of Vγ2Vδ2 T cells to mount expansion and adaptive or recall-like expansion. Expanded Vγ2Vδ2 T cells could traffic to and accumulate in the pulmonary compartment and intestinal mucosa. Expanded Vγ2Vδ2 T cells could evolve into effector cells producing IFN-γ, TNF-α, IL-4, IL-17, or perforin after L. monocytogenes infection, and some effector Vγ2Vδ2 T cells could coproduce IL-17 and IFN-γ, IL-4 and IFN-γ, or TNF-α and perforin. Surprisingly, in vivo-expanded Vγ2Vδ2 T effector cells in subclinical L. monocytogenes infection could directly lyse L. monocytogenes-infected target cells and inhibit intracellular L. monocytogenes bacteria. Thus, we present the first demonstration, to our knowledge, of multieffector-functional Vγ2Vδ2 T cell responses against L. monocytogenes.
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Affiliation(s)
- Bridgett Ryan-Payseur
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, IL 60612, USA
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Chen CY, Huang D, Yao S, Halliday L, Zeng G, Wang RC, Chen ZW. IL-2 simultaneously expands Foxp3+ T regulatory and T effector cells and confers resistance to severe tuberculosis (TB): implicative Treg-T effector cooperation in immunity to TB. THE JOURNAL OF IMMUNOLOGY 2012; 188:4278-88. [PMID: 22474020 DOI: 10.4049/jimmunol.1101291] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The possibility that simultaneous expansion of T regulatory cells (Treg) and T effector cells early postinfection can confer some immunological benefits has not been studied. In this study, we tested the hypothesis that early, simultaneous cytokine expansion of Treg and T effector cells in a tissue infection site can allow these T cell populations to act in concert to control tissue inflammation/damage while containing infection. IL-2 treatments early after Mycobacterium tuberculosis infection of macaques induced simultaneous expansion of CD4(+)CD25(+)Foxp3(+) Treg, CD8(+)CD25(+)Foxp3(+) T cells, and CD4(+) T effector/CD8(+) T effector/Vγ2Vδ2 T effector populations producing anti-M. tuberculosis cytokines IFN-γ and perforin, and conferred resistance to severe TB inflammation and lesions. IL-2-expanded Foxp3(+) Treg readily accumulated in pulmonary compartment, but despite this, rapid pulmonary trafficking/accumulation of IL-2-activated T effector populations still occurred. Such simultaneous recruitments of IL-2-expanded Treg and T effector populations to pulmonary compartment during M. tuberculosis infection correlated with IL-2-induced resistance to TB lesions without causing Treg-associated increases in M. tuberculosis burdens. In vivo depletion of IL-2-expanded CD4(+)Foxp3(+) Treg and CD4(+) T effectors during IL-2 treatment of M. tuberculosis-infected macaques significantly reduced IL-2-induced resistance to TB lesions, suggesting that IL-2-expanded CD4(+) T effector cells and Treg contributed to anti-TB immunity. Thus, IL-2 can simultaneously activate and expand T effector cells and Foxp3(+) Treg populations and confer resistance to severe TB without enhancing M. tuberculosis infection.
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Affiliation(s)
- Crystal Y Chen
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, College of Medicine, University of Illinois, Chicago, IL 60612, USA
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Huang D, Chen CY, Zhang M, Qiu L, Shen Y, Du G, Zhou K, Wang R, Chen ZW. Clonal immune responses of Mycobacterium-specific γδ T cells in tuberculous and non-tuberculous tissues during M. tuberculosis infection. PLoS One 2012; 7:e30631. [PMID: 22319574 PMCID: PMC3271047 DOI: 10.1371/journal.pone.0030631] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2011] [Accepted: 12/19/2011] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND We previously demonstrated that unvaccinated macaques infected with large-dose M.tuberculosis(Mtb) exhibited delays for pulmonary trafficking of Ag-specific αβ and γδ T effector cells, and developed severe lung tuberculosis(TB) and "secondary" Mtb infection in remote organs such as liver and kidney. Despite delays in lungs, local immunity in remote organs may accumulate since progressive immune activation after pulmonary Mtb infection may allow IFNγ-producing γδ T cells to adequately develop and traffic to lately-infected remote organs. As initial efforts to test this hypothesis, we comparatively examined TCR repertoire/clonality, tissue trafficking and effector function of Vγ2Vδ2 T cells in lung with severe TB and in liver/kidney without apparent TB. METHODOLOGY/PRINCIPAL FINDINGS We utilized conventional infection-immunity approaches in macaque TB model, and employed our decades-long expertise for TCR repertoire analyses. TCR repertoires in Vγ2Vδ2 T-cell subpopulation were broad during primary Mtb infection as most TCR clones found in lymphoid system, lung, kidney and liver were distinct. Polyclonally-expanded Vγ2Vδ2 T-cell clones from lymphoid tissues appeared to distribute and localize in lung TB granuloms at the endpoint after Mtb infection by aerosol. Interestingly, some TCR clones appeared to be more predominant than others in lymphocytes from liver or kidney without apparent TB lesions. TCR CDR3 spetratyping revealed such clonal dominance, and the clonal dominance of expanded Vγ2Vδ2 T cells in kidney/liver tissues was associated with undetectable or low-level TB burdens. Furthermore, Vγ2Vδ2 T cells from tissue compartments could mount effector function for producing anti-mycobacterium cytokine. CONCLUSION We were the first to demonstrate clonal immune responses of mycobacterium-specific Vγ2Vδ2 T cells in the lymphoid system, heavily-infected lungs and lately subtly-infected kidneys or livers during primary Mtb infection. While clonally-expanded Vγ2Vδ2 T cells accumulated in lately-infected kidneys/livers without apparent TB lesions, TB burdens or lesions appeared to impact TCR repertoires and tissue trafficking patterns of activated Vγ2Vδ2 T cells.
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Affiliation(s)
- Dan Huang
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, Illinois, United States of America
| | - Crystal Y. Chen
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, Illinois, United States of America
| | - Meihong Zhang
- Center for Gene Diagnosis, Zhongnan Hospital, Wuhan University, Wuhan, China
- Key Laboratory of Medical Molecular Activity Research, Guangdong Medical College, Dongguan, China
| | - Liyou Qiu
- College of Life Science, Henan Agricultural University, Zhengzhou, China
| | - Yun Shen
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, Illinois, United States of America
| | - George Du
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, Illinois, United States of America
| | - Keyuan Zhou
- Center for Gene Diagnosis, Zhongnan Hospital, Wuhan University, Wuhan, China
- Key Laboratory of Medical Molecular Activity Research, Guangdong Medical College, Dongguan, China
| | - Richard Wang
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, Illinois, United States of America
| | - Zheng W. Chen
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, Illinois, United States of America
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48
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Chen ZW. Immune biology of Ag-specific γδ T cells in infections. Cell Mol Life Sci 2011; 68:2409-17. [PMID: 21667064 DOI: 10.1007/s00018-011-0703-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2011] [Revised: 04/19/2011] [Accepted: 04/20/2011] [Indexed: 10/18/2022]
Abstract
Accumulating evidence suggests that human γδ T cells act as non-classical T cells and contribute to both innate and adaptive immune responses in infections. Vγ2 Vδ2 T (also termed Vγ9 Vδ2 T) cells exist only in primates, and in humans represent a dominant circulating γδ T-cell subset. Primate Vγ2 Vδ2 T cells are the only γδ T cell subset capable of recognizing microbial phosphoantigen. Since nonhuman primate Vγ2 Vδ2 T cells resemble their human counterparts, in-depth studies have been undertaken in macaques to understand the biology and function of human Vγ2 Vδ2 T cells. This article reviews the recent progress for immune biology of Vγ2 Vδ2 T cells in infections.
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Affiliation(s)
- Zheng W Chen
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine Chicago, Chicago, IL 60612, USA.
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Chiplunkar S, Dhar S, Wesch D, Kabelitz D. gammadelta T cells in cancer immunotherapy: current status and future prospects. Immunotherapy 2011; 1:663-78. [PMID: 20635991 DOI: 10.2217/imt.09.27] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
gammadelta T lymphocytes are a distinct T-cell subset that display unique features with respect to T-cell receptor (TCR) gene usage, tissue tropism and antigen recognition. Phosphoantigens contributed by a dysregulated mevalonate pathway or the bacterial nonmevalonate pathway and aminobisphosphonates are capable of activating Vgamma9Vdelta2 T cells. With the aid of synthetic phosphoantigens, large-scale expansion of gammadelta T cells and their adoptive transfer into human hosts is now possible. The present review summarizes triumphs and tribulations of clinical trials using gammadelta T-cell immunotherapy. Adoptive transfer of phosphoantigen-activated gammadelta T cells or coadministration with aminobisphosphonates/cytokines/monoclonal antibodies appear to be promising approaches for cancer immunotherapy. It can be predicted that a comprehensive understanding of the molecular interactions of this unique T-cell subset with other key immune regulators (dendritic cells and regulatory T cells) will provide an impetus to bring this modality of treatment from bench to bedside.
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Affiliation(s)
- Shubhada Chiplunkar
- Advanced Centre for Treatment, Research & Education in Cancer, Tata Memorial Centre, Kharghar, Navi Mumbai 410210, Maharashtra, India.
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50
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Du G, Chen CY, Shen Y, Qiu L, Huang D, Wang R, Chen ZW. TCR repertoire, clonal dominance, and pulmonary trafficking of mycobacterium-specific CD4+ and CD8+ T effector cells in immunity against tuberculosis. THE JOURNAL OF IMMUNOLOGY 2010; 185:3940-7. [PMID: 20805423 DOI: 10.4049/jimmunol.1001222] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Clonal responses of Mycobacterium tuberculosis-specific CD4(+) or CD8(+) T effector cells producing antituberculosis cytokine IFN-γ in the context of immune protection against tuberculosis remain poorly characterized in humans. Utilizing decade-long TCR expertise, we previously developed a useful method to isolate clonotypic TCR sequences from Ag-specific IFN-γ-producing T cells and to specifically measure clonotypic TCR frequencies in the T cell pool. In this study, we investigated TCR Vβ repertoires/CDR3 usage, clonal expansion or dominance, and pulmonary trafficking or accumulation for purified protein deritative (PPD)-specific T effector cells producing IFN-γ during bacillus Calmette-Guérin (BCG) vaccination and subsequent M. tuberculosis challenge of macaques. We found that while PPD-specific CD4(+) and CD8(+) T effector clones employed diverse TCR Vβ repertoires, 30-33% of IFN-γ(+)CD4(+) T cell clones from three M. tuberculosis-infected macaques expressed TCR bearing a conserved residue leucine in CDR3. Many Ag-specific IFN-γ(+) CD4(+) and few CD8(+) T effector cells emerged as dominant clones during mycobacterial infections and underwent major recall expansion after pulmonary M. tuberculosis infection of BCG-vaccinated macaques. PPD-specific T cell clones readily trafficked to the airway or lung after BCG vaccination or M. tuberculosis infection, and some of them continuously accumulated in lungs during M. tuberculosis infection even after they became undetectable in the circulation. Importantly, remarkable recall expansion and pulmonary accumulation of T effector cells coincided with BCG-induced protection against tuberculosis. Thus, rapid clonal expansion and pulmonary accumulation of Ag-specific T effector cells appear to be one of the immune mechanisms underlying immunity against tuberculosis.
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Affiliation(s)
- George Du
- Department of Microbiology and Immunology, Center for Primate Biomedical Research, University of Illinois College of Medicine, Chicago, IL 60612, USA
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