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Zhang Y, Lei F, Qian W, Zhang C, Wang Q, Liu C, Ji H, Liu Z, Wang F. Designing intelligent bioorthogonal nanozymes: Recent advances of stimuli-responsive catalytic systems for biomedical applications. J Control Release 2024; 373:929-951. [PMID: 39097195 DOI: 10.1016/j.jconrel.2024.07.073] [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: 04/29/2024] [Revised: 07/28/2024] [Accepted: 07/29/2024] [Indexed: 08/05/2024]
Abstract
Bioorthogonal nanozymes have emerged as a potent tool in biomedicine due to their unique ability to perform enzymatic reactions that do not interfere with native biochemical processes. The integration of stimuli-responsive mechanisms into these nanozymes has further expanded their potential, allowing for controlled activation and targeted delivery. As such, intelligent bioorthogonal nanozymes have received more and more attention in developing therapeutic approaches. This review provides a comprehensive overview of the recent advances in the development and application of stimuli-responsive bioorthogonal nanozymes. By summarizing the design outlines for anchoring bioorthogonal nanozymes with stimuli-responsive capability, this review seeks to offer valuable insights and guidance for the rational design of these remarkable materials. This review highlights the significant progress made in this exciting field with different types of stimuli and the various applications. Additionally, it also examines the current challenges and limitations in the design, synthesis, and application of these systems, and proposes potential solutions and research directions. This review aims to stimulate further research toward the development of more efficient and versatile stimuli-responsive bioorthogonal nanozymes for biomedical applications.
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Affiliation(s)
- Yan Zhang
- Institute of Special Environmental Medicine, Nantong University, Nantong 226019, China
| | - Fang Lei
- School of Public Health, Nantong University, Nantong 226019, China
| | - Wanlong Qian
- Institute of Special Environmental Medicine, Nantong University, Nantong 226019, China
| | - Chengfeng Zhang
- Institute of Special Environmental Medicine, Nantong University, Nantong 226019, China
| | - Qi Wang
- School of Public Health, Nantong University, Nantong 226019, China
| | - Chaoqun Liu
- School of Pharmacy, Henan University, Kaifeng 475004, China
| | - Haiwei Ji
- School of Public Health, Nantong University, Nantong 226019, China
| | - Zhengwei Liu
- Precision Immunology Institute, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York 10029, USA.
| | - Faming Wang
- School of Public Health, Nantong University, Nantong 226019, China.
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2
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Li Y, Chen Y, Wang D, Wu L, Li T, An N, Yang H. Elucidating the multifaceted role of MGAT1 in hepatocellular carcinoma: integrative single-cell and spatial transcriptomics reveal novel therapeutic insights. Front Immunol 2024; 15:1442722. [PMID: 39081317 PMCID: PMC11286416 DOI: 10.3389/fimmu.2024.1442722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2024] [Accepted: 06/28/2024] [Indexed: 08/02/2024] Open
Abstract
Background Glycosyltransferase-associated genes play a crucial role in hepatocellular carcinoma (HCC) pathogenesis. This study investigates their impact on the tumor microenvironment and molecular mechanisms, offering insights into innovative immunotherapeutic strategies for HCC. Methods We utilized cutting-edge single-cell and spatial transcriptomics to examine HCC heterogeneity. Four single-cell scoring techniques were employed to evaluate glycosyltransferase genes. Spatial transcriptomic findings were validated, and bulk RNA-seq analysis was conducted to identify prognostic glycosyltransferase-related genes and potential immunotherapeutic targets. MGAT1's role was further explored through various functional assays. Results Our analysis revealed diverse cell subpopulations in HCC with distinct glycosyltransferase gene activities, particularly in macrophages. Key glycosyltransferase genes specific to macrophages were identified. Temporal analysis illustrated macrophage evolution during tumor progression, while spatial transcriptomics highlighted reduced expression of these genes in core tumor macrophages. Integrating scRNA-seq, bulk RNA-seq, and spatial transcriptomics, MGAT1 emerged as a promising therapeutic target, showing significant potential in HCC immunotherapy. Conclusion This comprehensive study delves into glycosyltransferase-associated genes in HCC, elucidating their critical roles in cellular dynamics and immune cell interactions. Our findings open new avenues for immunotherapeutic interventions and personalized HCC management, pushing the boundaries of HCC immunotherapy.
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Affiliation(s)
- Yang Li
- Department of General Medicine, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Third Hospital of Shanxi Medical University, Tongji Shanxi Hospital, Taiyuan, China
| | - Yuan Chen
- Department of General Medicine, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Third Hospital of Shanxi Medical University, Tongji Shanxi Hospital, Taiyuan, China
- Department of Geriatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Danqiong Wang
- Department of General Medicine, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Third Hospital of Shanxi Medical University, Tongji Shanxi Hospital, Taiyuan, China
| | - Ling Wu
- Tumor Center, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Third Hospital of Shanxi Medical University, Tongji Shanxi Hospital, Taiyuan, China
| | - Tao Li
- Department of General Medicine, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Third Hospital of Shanxi Medical University, Tongji Shanxi Hospital, Taiyuan, China
| | - Na An
- Department of General Medicine, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Third Hospital of Shanxi Medical University, Tongji Shanxi Hospital, Taiyuan, China
| | - Haikun Yang
- The Gastroenterology Department, Shanxi Provincial People Hospital, Taiyuan, China
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3
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McMaster B, Thorpe C, Ogg G, Deane CM, Koohy H. Can AlphaFold's breakthrough in protein structure help decode the fundamental principles of adaptive cellular immunity? Nat Methods 2024; 21:766-776. [PMID: 38654083 DOI: 10.1038/s41592-024-02240-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 03/08/2024] [Indexed: 04/25/2024]
Abstract
T cells are essential immune cells responsible for identifying and eliminating pathogens. Through interactions between their T-cell antigen receptors (TCRs) and antigens presented by major histocompatibility complex molecules (MHCs) or MHC-like molecules, T cells discriminate foreign and self peptides. Determining the fundamental principles that govern these interactions has important implications in numerous medical contexts. However, reconstructing a map between T cells and their antagonist antigens remains an open challenge for the field of immunology, and success of in silico reconstructions of this relationship has remained incremental. In this Perspective, we discuss the role that new state-of-the-art deep-learning models for predicting protein structure may play in resolving some of the unanswered questions the field faces linking TCR and peptide-MHC properties to T-cell specificity. We provide a comprehensive overview of structural databases and the evolution of predictive models, and highlight the breakthrough AlphaFold provided the field.
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Affiliation(s)
- Benjamin McMaster
- MRC Translational Immune Discovery Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, UK
- Department of Statistics, University of Oxford, Oxford, UK
| | - Christopher Thorpe
- Open Targets, Wellcome Genome Campus, Hinxton, UK
- European Molecular Biology Laboratory, European Bioinformatics Institute (EMBL-EBI), Wellcome Genome Campus, Hinxton, UK
| | - Graham Ogg
- MRC Translational Immune Discovery Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, UK
- Chinese Academy of Medical Sciences Oxford Institute, University of Oxford, Oxford, UK
| | | | - Hashem Koohy
- MRC Translational Immune Discovery Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, UK.
- Alan Turning Fellow in Health and Medicine, University of Oxford, Oxford, UK.
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4
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Zhang Y, Yang Z, Saimi D, Shen X, Ye J, Yu B, Pefaur N, Scheer JM, Nixon AE, Chen Z. Geometric Antibody Engineering Reveals the Spatial Factor on the Efficacy of Bispecific T Cell Engagers. ACS Chem Biol 2024; 19:916-925. [PMID: 38491942 DOI: 10.1021/acschembio.3c00728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2024]
Abstract
Bispecific antibodies (BsAbs) represent an emerging class of biologics that can recognize two different antigens or epitopes. T-cell engagers (TcEs) bind two targets in trans on the cell surface of the effector and target cell to induce proximal immune effects, opening exciting windows for immunotherapies. To date, the engineering of BsAbs has been mainly focused on tuning the molecular weight and valency. However, the effects of spatial factors on the biological functions of BsAbs have been less explored due to the lack of biochemical methods to precisely manipulate protein geometry. Here, we studied the geometric effects of the TcEs. First, by genetically inserting rigidly designed ankyrin repeat proteins into TcEs, we revealed that the efficacy progressively decreased as the spacer distance of the two binding domains increased. Then, we constructed 26 pairs of TcEs with the same size but varying orientations using click chemistry-mediated conjugation at different mutation sites. We found that linear ligation sites play a minor role in modulating cell-killing efficacy. Next, we rendered the TcEs' advanced topology by cyclization chemistry using the SpyTag/SpyCatcher pair or sortase ligation approaches. Cyclized TcEs were generally more potent than their linear counterparts. Particularly, sortase A cyclized TcEs, bearing a minimal tagging motif, exhibited better cell-killing efficacy in vitro and improved stability both in vitro and in vivo compared to the linear TcE. This work combines modern bioconjugation chemistry and protein engineering tools for antibody engineering, shedding light on the elusive spatial factors of BsAbs functionality.
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Affiliation(s)
- Yu Zhang
- College of Future Technology, Institute of Molecular Medicine, National Biomedical Imaging Center, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Peking University, Beijing 100871, China
- Peking-Tsinghua Center for Life Science, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
| | - Zhe Yang
- College of Future Technology, Institute of Molecular Medicine, National Biomedical Imaging Center, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Peking University, Beijing 100871, China
| | - Dilizhatai Saimi
- College of Future Technology, Institute of Molecular Medicine, National Biomedical Imaging Center, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Peking University, Beijing 100871, China
| | - Xiaowen Shen
- College of Future Technology, Institute of Molecular Medicine, National Biomedical Imaging Center, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Peking University, Beijing 100871, China
- Peking-Tsinghua Center for Life Science, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
| | - Junqing Ye
- Department of Research Beyond Borders, Boehringer Ingelheim, Investment Co., Ltd., Beijing 100027, China
| | - Bingke Yu
- Department of Research Beyond Borders, Boehringer Ingelheim, Investment Co., Ltd., Shanghai 200040, China
| | - Noah Pefaur
- Biotherapeutics Discovery, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, Connecticut 06877, United States
| | - Justin M Scheer
- Biotherapeutics Discovery, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, Connecticut 06877, United States
| | - Andrew E Nixon
- Biotherapeutics Discovery, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, Connecticut 06877, United States
| | - Zhixing Chen
- College of Future Technology, Institute of Molecular Medicine, National Biomedical Imaging Center, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Peking University, Beijing 100871, China
- Peking-Tsinghua Center for Life Science, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
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5
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Lin TD, Rubinstein ND, Fong NL, Smith M, Craft W, Martin-McNulty B, Perry R, Delaney MA, Roy MA, Buffenstein R. Evolution of T cells in the cancer-resistant naked mole-rat. Nat Commun 2024; 15:3145. [PMID: 38605005 PMCID: PMC11009300 DOI: 10.1038/s41467-024-47264-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 03/26/2024] [Indexed: 04/13/2024] Open
Abstract
Naked mole-rats (NMRs) are best known for their extreme longevity and cancer resistance, suggesting that their immune system might have evolved to facilitate these phenotypes. Natural killer (NK) and T cells have evolved to detect and destroy cells infected with pathogens and to provide an early response to malignancies. While it is known that NMRs lack NK cells, likely lost during evolution, little is known about their T-cell subsets in terms of the evolution of the genes that regulate their function, their clonotypic diversity, and the thymus where they mature. Here we find, using single-cell transcriptomics, that NMRs have a large circulating population of γδT cells, which in mice and humans mostly reside in peripheral tissues and induce anti-cancer cytotoxicity. Using single-cell-T-cell-receptor sequencing, we find that a cytotoxic γδT-cell subset of NMRs harbors a dominant clonotype, and that their conventional CD8 αβT cells exhibit modest clonotypic diversity. Consistently, perinatal NMR thymuses are considerably smaller than those of mice yet follow similar involution progression. Our findings suggest that NMRs have evolved under a relaxed intracellular pathogenic selective pressure that may have allowed cancer resistance and longevity to become stronger targets of selection to which the immune system has responded by utilizing γδT cells.
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Affiliation(s)
- Tzuhua D Lin
- Calico Life Sciences LLC, South San Francisco, California, CA, USA
| | | | - Nicole L Fong
- Calico Life Sciences LLC, South San Francisco, California, CA, USA
| | - Megan Smith
- Calico Life Sciences LLC, South San Francisco, California, CA, USA
| | - Wendy Craft
- Calico Life Sciences LLC, South San Francisco, California, CA, USA
| | | | - Rebecca Perry
- Department of Biological Science, University of Illinois at Chicago, Illinois, IL, USA
| | | | - Margaret A Roy
- Calico Life Sciences LLC, South San Francisco, California, CA, USA
| | - Rochelle Buffenstein
- Calico Life Sciences LLC, South San Francisco, California, CA, USA.
- Department of Biological Science, University of Illinois at Chicago, Illinois, IL, USA.
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6
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Yang L, Sheets TP, Feng Y, Yu G, Bajgain P, Hsu KS, So D, Seaman S, Lee J, Lin L, Evans CN, Guest MR, Chari R, St. Croix B. Uncovering receptor-ligand interactions using a high-avidity CRISPR activation screening platform. SCIENCE ADVANCES 2024; 10:eadj2445. [PMID: 38354234 PMCID: PMC10866537 DOI: 10.1126/sciadv.adj2445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 01/12/2024] [Indexed: 02/16/2024]
Abstract
The majority of clinically approved drugs target proteins that are secreted or cell surface bound. However, further advances in this area have been hindered by the challenging nature of receptor deorphanization, as there are still many secreted and cell-bound proteins with unknown binding partners. Here, we developed an advanced screening platform that combines CRISPR-CAS9 guide-mediated gene activation (CRISPRa) and high-avidity bead-based selection. The CRISPRa platform incorporates serial enrichment and flow cytometry-based monitoring, resulting in substantially improved screening sensitivity for well-known yet weak interactions of the checkpoint inhibitor family. Our approach has successfully revealed that siglec-4 exerts regulatory control over T cell activation through a low affinity trans-interaction with the costimulatory receptor 4-1BB. Our highly efficient screening platform holds great promise for identifying extracellular interactions of uncharacterized receptor-ligand partners, which is essential to develop next-generation therapeutics, including additional immune checkpoint inhibitors.
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Affiliation(s)
- Liping Yang
- Tumor Angiogenesis Unit, Mouse Cancer Genetics Program (MCGP), National Cancer Institute (NCI), NIH, Frederick, MD 21702, USA
| | - Timothy P. Sheets
- Genome Modification Core, Laboratory Animal Sciences Program, Frederick National Lab for Cancer Research, Frederick, MD 21702, USA
| | - Yang Feng
- Tumor Angiogenesis Unit, Mouse Cancer Genetics Program (MCGP), National Cancer Institute (NCI), NIH, Frederick, MD 21702, USA
| | - Guojun Yu
- Tumor Angiogenesis Unit, Mouse Cancer Genetics Program (MCGP), National Cancer Institute (NCI), NIH, Frederick, MD 21702, USA
| | - Pradip Bajgain
- Tumor Angiogenesis Unit, Mouse Cancer Genetics Program (MCGP), National Cancer Institute (NCI), NIH, Frederick, MD 21702, USA
| | - Kuo-Sheng Hsu
- Tumor Angiogenesis Unit, Mouse Cancer Genetics Program (MCGP), National Cancer Institute (NCI), NIH, Frederick, MD 21702, USA
| | - Daeho So
- Tumor Angiogenesis Unit, Mouse Cancer Genetics Program (MCGP), National Cancer Institute (NCI), NIH, Frederick, MD 21702, USA
| | - Steven Seaman
- Tumor Angiogenesis Unit, Mouse Cancer Genetics Program (MCGP), National Cancer Institute (NCI), NIH, Frederick, MD 21702, USA
| | - Jaewon Lee
- Tumor Angiogenesis Unit, Mouse Cancer Genetics Program (MCGP), National Cancer Institute (NCI), NIH, Frederick, MD 21702, USA
| | - Ling Lin
- Proteomic Instability of Cancer Section, MCGP, NCI, NIH, Frederick, MD 21702, USA
| | - Christine N. Evans
- Genome Modification Core, Laboratory Animal Sciences Program, Frederick National Lab for Cancer Research, Frederick, MD 21702, USA
| | - Mary R. Guest
- Genome Modification Core, Laboratory Animal Sciences Program, Frederick National Lab for Cancer Research, Frederick, MD 21702, USA
| | - Raj Chari
- Genome Modification Core, Laboratory Animal Sciences Program, Frederick National Lab for Cancer Research, Frederick, MD 21702, USA
| | - Brad St. Croix
- Tumor Angiogenesis Unit, Mouse Cancer Genetics Program (MCGP), National Cancer Institute (NCI), NIH, Frederick, MD 21702, USA
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7
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Partin AC, Bruno R, Shafaattalab S, Vander Mause E, Winters A, Daris M, Gahrs C, Jette CA, DiAndreth B, Sandberg ML, Hamburger AE, Kamb A, Riley TP. Geometric parameters that affect the behavior of logic-gated CAR T cells. Front Immunol 2024; 15:1304765. [PMID: 38343543 PMCID: PMC10853413 DOI: 10.3389/fimmu.2024.1304765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 01/12/2024] [Indexed: 02/15/2024] Open
Abstract
Clinical applications of CAR-T cells are limited by the scarcity of tumor-specific targets and are often afflicted with the same on-target/off-tumor toxicities that plague other cancer treatments. A new promising strategy to enforce tumor selectivity is the use of logic-gated, two-receptor systems. One well-described application is termed Tmod™, which originally utilized a blocking inhibitory receptor directed towards HLA-I target antigens to create a protective NOT gate. Here we show that the function of Tmod blockers targeting non-HLA-I antigens is dependent on the height of the blocker antigen and is generally compatible with small, membrane-proximal targets. We compensate for this apparent limitation by incorporating modular hinge units to artificially extend or retract the ligand-binding domains relative to the effector cell surface, thereby modulating Tmod activator and blocker function. By accounting for structural differences between activator and blocker targets, we developed a set of simple geometric parameters for Tmod receptor design that enables targeting of blocker antigens beyond HLA-I, thereby broadening the applications of logic-gated cell therapies.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | - Alexander Kamb
- A2 Biotherapeutics, Inc., Agoura Hills, CA, United States
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8
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Yu J, Li M, Ren B, Cheng L, Wang X, Ma Z, Yong WP, Chen X, Wang L, Goh BC. Unleashing the efficacy of immune checkpoint inhibitors for advanced hepatocellular carcinoma: factors, strategies, and ongoing trials. Front Pharmacol 2023; 14:1261575. [PMID: 37719852 PMCID: PMC10501787 DOI: 10.3389/fphar.2023.1261575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 08/18/2023] [Indexed: 09/19/2023] Open
Abstract
Hepatocellular carcinoma (HCC) is a prevalent primary liver cancer, representing approximately 85% of cases. The diagnosis is often made in the middle and late stages, necessitating systemic treatment as the primary therapeutic option. Despite sorafenib being the established standard of care for advanced HCC in the past decade, the efficacy of systemic therapy remains unsatisfactory, highlighting the need for novel treatment modalities. Recent breakthroughs in immunotherapy have shown promise in HCC treatment, particularly with immune checkpoint inhibitors (ICIs). However, the response rate to ICIs is currently limited to approximately 15%-20% of HCC patients. Recently, ICIs demonstrated greater efficacy in "hot" tumors, highlighting the urgency to devise more effective approaches to transform "cold" tumors into "hot" tumors, thereby enhancing the therapeutic potential of ICIs. This review presented an updated summary of the factors influencing the effectiveness of immunotherapy in HCC treatment, identified potential combination therapies that may improve patient response rates to ICIs, and offered an overview of ongoing clinical trials focusing on ICI-based combination therapy.
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Affiliation(s)
- Jiahui Yu
- School of Basic Medicine, Health Science Center, Yangtze University, Jingzhou, China
| | - Mengnan Li
- School of Basic Medicine, Health Science Center, Yangtze University, Jingzhou, China
| | - Boxu Ren
- School of Basic Medicine, Health Science Center, Yangtze University, Jingzhou, China
| | - Le Cheng
- School of Basic Medicine, Health Science Center, Yangtze University, Jingzhou, China
| | - Xiaoxiao Wang
- School of Basic Medicine, Health Science Center, Yangtze University, Jingzhou, China
| | - Zhaowu Ma
- School of Basic Medicine, Health Science Center, Yangtze University, Jingzhou, China
| | - Wei Peng Yong
- Department of Haematology–Oncology, National University Cancer Institute, Singapore, Singapore
- NUS Center for Cancer Research (N2CR), Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Xiaoguang Chen
- School of Basic Medicine, Health Science Center, Yangtze University, Jingzhou, China
| | - Lingzhi Wang
- NUS Center for Cancer Research (N2CR), Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
| | - Boon Cher Goh
- Department of Haematology–Oncology, National University Cancer Institute, Singapore, Singapore
- NUS Center for Cancer Research (N2CR), Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
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9
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Vyasamneni R, Kohler V, Karki B, Mahimkar G, Esaulova E, McGee J, Kallin D, Sheen JH, Harjanto D, Kirsch M, Poran A, Dong J, Srinivasan L, Gaynor RB, Bushway ME, Srouji JR. A universal MHCII technology platform to characterize antigen-specific CD4 + T cells. CELL REPORTS METHODS 2023; 3:100388. [PMID: 36814840 PMCID: PMC9939426 DOI: 10.1016/j.crmeth.2022.100388] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 11/08/2022] [Accepted: 12/20/2022] [Indexed: 01/15/2023]
Abstract
CD4+ T cells are critical to the immune system and perform multiple functions; therefore, their identification and characterization are crucial to better understanding the immune system in both health and disease states. However, current methods rarely preserve their ex vivo phenotype, thus limiting our understanding of their in vivo functions. Here we introduce a flexible, rapid, and robust platform for ex vivo CD4+ T cell identification. By combining MHCII allele purification, allele-independent peptide loading, and multiplexed flow cytometry technologies, we can enable high-throughput personalized CD4+ T cell identification, immunophenotyping, and sorting. Using this platform in combination with single-cell sorting and multimodal analyses, we identified and characterized antigen-specific CD4+ T cells relevant to COVID-19 and cancer neoantigen immunotherapy. Overall, our platform can be used to detect and characterize CD4+ T cells across multiple diseases, with potential to guide CD4+ T cell epitope design for any disease-specific immunization strategy.
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Affiliation(s)
| | | | - Binisha Karki
- BioNTech US, Inc., 40 Erie Street, Cambridge, MA 02139, USA
| | - Gauri Mahimkar
- BioNTech US, Inc., 40 Erie Street, Cambridge, MA 02139, USA
| | | | - Jonathan McGee
- BioNTech US, Inc., 40 Erie Street, Cambridge, MA 02139, USA
| | - Daniel Kallin
- BioNTech US, Inc., 40 Erie Street, Cambridge, MA 02139, USA
| | | | - Dewi Harjanto
- BioNTech US, Inc., 40 Erie Street, Cambridge, MA 02139, USA
| | - Miles Kirsch
- BioNTech US, Inc., 40 Erie Street, Cambridge, MA 02139, USA
| | - Asaf Poran
- BioNTech US, Inc., 40 Erie Street, Cambridge, MA 02139, USA
| | - Jesse Dong
- BioNTech US, Inc., 40 Erie Street, Cambridge, MA 02139, USA
| | | | | | | | - John R. Srouji
- BioNTech US, Inc., 40 Erie Street, Cambridge, MA 02139, USA
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Tian HF, Xing J, Tang XQ, Chi H, Sheng XZ, Zhan WB. Cluster of differentiation antigens: essential roles in the identification of teleost fish T lymphocytes. MARINE LIFE SCIENCE & TECHNOLOGY 2022; 4:303-316. [PMID: 37073166 PMCID: PMC10077257 DOI: 10.1007/s42995-022-00136-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 05/25/2022] [Indexed: 05/03/2023]
Abstract
Cluster of differentiation (CD) antigens are cell surface molecules expressed on leukocytes and other cells associated with the immune system. Antibodies that react with CD antigens are known to be one of the most essential tools for identifying leukocyte subpopulations. T lymphocytes, as an important population of leukocytes, play essential roles in the adaptive immune system. Many of the CD antigens expressed on T lymphocytes are used as surface markers for T lymphocyte classification, including CD3, CD4 and CD8 molecules. In this review, we summarize the recent advances in the identification of CD molecules on T lymphocytes in teleosts, with emphasis on the functions of CD markers in the classification of T lymphocyte subsets. We notice that genes encoding CD3, co-receptors CD4 and CD8 have been cloned in several fish species and antibodies have been developed to study protein expression in morphological and functional contexts. T lymphocytes can be divided into CD4+ and CD8+ cells discriminated by the expression of CD4 and CD8 molecules in teleost, which are functionally similar to mammalian helper T cells (Th) and cytotoxic T cells (Tc), respectively. Further studies are still needed on the particular characteristics of teleost T cell repertoires and adaptive responses, and results will facilitate the health management and development of vaccines for fish.
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Affiliation(s)
- Hong-fei Tian
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Fisheries College, Ocean University of China, Qingdao, 266003 China
| | - Jing Xing
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Fisheries College, Ocean University of China, Qingdao, 266003 China
- Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237 China
| | - Xiao-qian Tang
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Fisheries College, Ocean University of China, Qingdao, 266003 China
| | - Heng Chi
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Fisheries College, Ocean University of China, Qingdao, 266003 China
| | - Xiu-zhen Sheng
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Fisheries College, Ocean University of China, Qingdao, 266003 China
| | - Wen-bin Zhan
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Fisheries College, Ocean University of China, Qingdao, 266003 China
- Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237 China
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11
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Lou K, Feng S, Zhang G, Zou J, Zou X. Prevention and Treatment of Side Effects of Immunotherapy for Bladder Cancer. Front Oncol 2022; 12:879391. [PMID: 35669417 PMCID: PMC9164628 DOI: 10.3389/fonc.2022.879391] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Accepted: 04/19/2022] [Indexed: 12/12/2022] Open
Abstract
Bladder cancer (BC) is one of the most important tumors of the genitourinary system, associated with high morbidity and mortality rates. Over the years, various antitumor treatments have been developed, and immunotherapy is one of the most effective methods. Immunotherapy aims to activate the body’s immune system to kill cancer cells. It has been established that immunotherapy drugs can be classified into “non-targeted” and “targeted” drugs depending on their site of action. Immunotherapy is reportedly effective for BC. Even though it can attack cancer cells, it can also cause the immune system to attack healthy cells, which can occur at any time during treatment and sometimes even after immunotherapy is stopped. Importantly, different types of immunotherapies can cause different side effects. Side effects may manifest themselves as signs or as symptoms. The prevention and treatment of side effects caused by immunotherapy is an important part of cancer patient management.
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Affiliation(s)
- Kecheng Lou
- The First Clinical College, Gannan Medical University, Ganzhou, China.,Department of Urology, The First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Shangzhi Feng
- The First Clinical College, Gannan Medical University, Ganzhou, China.,Department of Urology, The First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Guoxi Zhang
- Department of Urology, The First Affiliated Hospital of Gannan Medical University, Ganzhou, China.,Institute of Urology, The First Affiliated Hospital of Gannan Medical University, Ganzhou, China.,Jiangxi Engineering Technology Research Center of Calculi Prevention, Gannan Medical University, Ganzhou, Jiangxi, China
| | - Junrong Zou
- Department of Urology, The First Affiliated Hospital of Gannan Medical University, Ganzhou, China.,Institute of Urology, The First Affiliated Hospital of Gannan Medical University, Ganzhou, China.,Jiangxi Engineering Technology Research Center of Calculi Prevention, Gannan Medical University, Ganzhou, Jiangxi, China
| | - Xiaofeng Zou
- Department of Urology, The First Affiliated Hospital of Gannan Medical University, Ganzhou, China.,Institute of Urology, The First Affiliated Hospital of Gannan Medical University, Ganzhou, China.,Jiangxi Engineering Technology Research Center of Calculi Prevention, Gannan Medical University, Ganzhou, Jiangxi, China
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12
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Rollins ZA, Huang J, Tagkopoulos I, Faller R, George SC. A Computational Algorithm to Assess the Physiochemical Determinants of T Cell Receptor Dissociation Kinetics. Comput Struct Biotechnol J 2022; 20:3473-3481. [PMID: 35860406 PMCID: PMC9278023 DOI: 10.1016/j.csbj.2022.06.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 06/20/2022] [Accepted: 06/21/2022] [Indexed: 11/29/2022] Open
Abstract
The rational design of T Cell Receptors (TCRs) for immunotherapy has stagnated due to a limited understanding of the dynamic physiochemical features of the TCR that elicit an immunogenic response. The physiochemical features of the TCR-peptide major histocompatibility complex (pMHC) bond dictate bond lifetime which, in turn, correlates with immunogenicity. Here, we: i) characterize the force-dependent dissociation kinetics of the bond between a TCR and a set of pMHC ligands using Steered Molecular Dynamics (SMD); and ii) implement a machine learning algorithm to identify which physiochemical features of the TCR govern dissociation kinetics. Our results demonstrate that the total number of hydrogen bonds between the CDR2β-MHC⍺(β), CDR1α-Peptide, and CDR3β-Peptide are critical features that determine bond lifetime.
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Affiliation(s)
| | - Jun Huang
- University of California, Davis, Davis, California, Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL
| | | | | | - Steven C. George
- Department of Biomedical Engineering
- Corresponding author at: Department of Biomedical Engineering, 451 E. Health Sciences Drive, room 2315, University of California, Davis, Davis, CA 95616.
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13
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Alausa A, Lawal KA, Babatunde OA, Obiwulu ENO, Oladokun OC, Fadahunsi OS, Celestine UO, Moses EU, Rejoice AI, Adegbola PI. Overcoming Immunotherapeutic Resistance in PDAC: SIRPα-CD47 blockade. Pharmacol Res 2022; 181:106264. [PMID: 35597384 DOI: 10.1016/j.phrs.2022.106264] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 05/15/2022] [Indexed: 11/25/2022]
Abstract
A daily increase in the number of new cases of pancreatic ductal adenocarcinoma remains an issue of contention in cancer research. The data revealed that a global cumulated case of about 500, 000 have been reported. This has made PDAC the fourteenth most occurring tumor case in cancer research. Furthermore, PDAC is responsible for about 466,003 deaths annually, representing the seventh prevalent type of cancer mortality. PDAC has no salient symptoms in its early stages. This has exasperated several attempts to produce a perfect therapeutic agent against PDAC. Recently, immunotherapeutic research has shifted focus to the blockade of checkpoint proteins in the management and of some cancers. Investigations have centrally focused on developing therapeutic agents that could at least to a significant extent block the SIRPα-CD47 signaling cascade (a cascade which prevent phagocytosis of tumors by dendritic cells, via the deactivation of innate immunity and subsequently resulting in tumor regression) with minimal side effects. The concept on the blockade of this interaction as a possible mechanism for inhibiting the progression of PDAC is currently being debated. This review examined the structure--function activity of SIRPα-CD47 interaction while discussing in detail the mechanism of tumor resistance in PDAC. Further, this review details how the blockade of SIRPα-CD47 interaction serve as a therapeutic option in the management of PDAC.
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Affiliation(s)
- Abdullahi Alausa
- Department of Biochemistry, Ladoke Akintola University of Technology, Ogbomoso, Oyo state.
| | - Khadijat Ayodeji Lawal
- Heamtalogy and Blood Transfusion Unit, Department of Medical Laboratory Science, Ladoke Akintola University of Technology, Ogbomoso, Nigeria
| | | | - E N O Obiwulu
- Department of Chemical Science, University of Delta, Agbor, Delta State
| | | | | | - Ugwu Obiora Celestine
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Enugu State University of Science and Technology
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14
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Dahal A, Parajuli P, Singh SS, Shrestha L, Sonju JJ, Shrestha P, Chatzistamou I, Jois S. Targeting protein–protein interaction for immunomodulation: A sunflower trypsin inhibitor analog peptidomimetic suppresses RA progression in CIA model. J Pharmacol Sci 2022; 149:124-138. [PMID: 35641025 PMCID: PMC9208026 DOI: 10.1016/j.jphs.2022.04.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 03/10/2022] [Accepted: 04/18/2022] [Indexed: 11/29/2022] Open
Abstract
Protein–protein interactions (PPI) of co-stimulatory molecules CD2-CD58 are important in the early stage of an immune response, and increased expression of these co-stimulatory molecules is observed in the synovial region of joints in rheumatoid arthritis (RA) patients. A CD2 epitope region that binds to CD58 was grafted on to sunflower trypsin inhibitor (SFTI) template structure to inhibit CD2-CD58 PPI. The peptide was incorporated with an organic moiety dibenzofuran (DBF) in its structure. The designed peptidomimetic was studied for its ability to inhibit CD2-CD58 interactions in vitro, and its thermal and enzymatic stability was evaluated. Stability studies indicated that the grafted peptidomimetic was stable against trypsin cleavage. In vivo studies using the collagen-induced arthritis (CIA) model in mice indicated that the peptidomimetic was able to slow down the progress of arthritis, an autoimmune disease in the mice model. These studies suggest that with the grafting of organic functional groups in the stable peptide template SFTI stabilizes the peptide structure, and these peptides can be used as a template to design stable peptides for therapeutic purposes.
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Affiliation(s)
- Achyut Dahal
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana Monroe, Monroe LA, 71201, USA
| | - Pravin Parajuli
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana Monroe, Monroe LA, 71201, USA
| | - Sitanshu S Singh
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana Monroe, Monroe LA, 71201, USA
| | - Leeza Shrestha
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana Monroe, Monroe LA, 71201, USA
| | - Jafrin Jobayer Sonju
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana Monroe, Monroe LA, 71201, USA
| | - Prajesh Shrestha
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana Monroe, Monroe LA, 71201, USA
| | - Ioulia Chatzistamou
- Department of Pathology, Microbiology & Immunology (PMI), School of Medicine, USC, SC 6439 Garners Ferry Rd, Columbia, SC, 29208, USA
| | - Seetharama Jois
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana Monroe, Monroe LA, 71201, USA.
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15
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CD5 Deficiency Alters Helper T Cell Metabolic Function and Shifts the Systemic Metabolome. Biomedicines 2022; 10:biomedicines10030704. [PMID: 35327505 PMCID: PMC8945004 DOI: 10.3390/biomedicines10030704] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 03/07/2022] [Accepted: 03/15/2022] [Indexed: 02/01/2023] Open
Abstract
Metabolic function plays a key role in immune cell activation, destruction of foreign pathogens, and memory cell generation. As T cells are activated, their metabolic profile is significantly changed due to signaling cascades mediated by the T cell receptor (TCR) and co-receptors found on their surface. CD5 is a T cell co-receptor that regulates thymocyte selection and peripheral T cell activation. The removal of CD5 enhances T cell activation and proliferation, but how this is accomplished is not well understood. We examined how CD5 specifically affects CD4+ T cell metabolic function and systemic metabolome by analyzing serum and T cell metabolites from CD5WT and CD5KO mice. We found that CD5 removal depletes certain serum metabolites, and CD5KO T cells have higher levels of several metabolites. Transcriptomic analysis identified several upregulated metabolic genes in CD5KO T cells. Bioinformatic analysis identified glycolysis and the TCA cycle as metabolic pathways promoted by CD5 removal. Functional metabolic analysis demonstrated that CD5KO T cells have higher oxygen consumption rates (OCR) and higher extracellular acidification rates (ECAR). Together, these findings suggest that the loss of CD5 is linked to CD4+ T cell metabolism changes in metabolic gene expression and metabolite concentration.
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16
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Le Page L, Baldwin CL, Telfer JC. γδ T cells in artiodactyls: Focus on swine. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2022; 128:104334. [PMID: 34919982 DOI: 10.1016/j.dci.2021.104334] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 12/08/2021] [Accepted: 12/08/2021] [Indexed: 06/14/2023]
Abstract
Vaccination is the most effective medical strategy for disease prevention but there is a need to improve livestock vaccine efficacy. Understanding the structure of the immune system of swine, which are considered a γδ T cell "high" species, and thus, particularly how to engage their γδ T cells for immune responses, may allow for development of vaccine optimization strategies. The propensity of γδ T cells to home to specific tissues, secrete pro-inflammatory and regulatory cytokines, exhibit memory or recall responses and even function as antigen-presenting cells for αβ T cells supports the concept that they have enormous potential for priming by next generation vaccine constructs to contribute to protective immunity. γδ T cells exhibit several innate-like antigen recognition properties including the ability to recognize antigen in the absence of presentation via major histocompatibility complex (MHC) molecules enabling γδ T cells to recognize an array of peptides but also non-peptide antigens in a T cell receptor-dependent manner. γδ T cell subpopulations in ruminants and swine can be distinguished based on differential expression of the hybrid co-receptor and pattern recognition receptors (PRR) known as workshop cluster 1 (WC1). Expression of various PRR and other innate-like immune receptors diversifies the antigen recognition potential of γδ T cells. Finally, γδ T cells in livestock are potent producers of critical master regulator cytokines such as interferon (IFN)-γ and interleukin (IL)-17, whose production orchestrates downstream cytokine and chemokine production by other cells, thereby shaping the immune response as a whole. Our knowledge of the biology, receptor expression and response to infectious diseases by swine γδ T cells is reviewed here.
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Affiliation(s)
- Lauren Le Page
- Department of Veterinary & Animal Sciences, University of Massachusetts, Amherst, MA, 01003, USA
| | - Cynthia L Baldwin
- Department of Veterinary & Animal Sciences, University of Massachusetts, Amherst, MA, 01003, USA
| | - Janice C Telfer
- Department of Veterinary & Animal Sciences, University of Massachusetts, Amherst, MA, 01003, USA.
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17
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Lückemeier P, Molter KL, Jarosch S, Huppertz P, Purcarea A, Effenberger MJP, Nauerth M, D'Ippolito E, Schober K, Busch DH. Global k off -rates of polyclonal T cell populations merge subclonal avidities and predict functionality. Eur J Immunol 2022; 52:582-596. [PMID: 35099805 DOI: 10.1002/eji.202149597] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Revised: 12/07/2021] [Accepted: 01/24/2022] [Indexed: 11/07/2022]
Abstract
The avidity of T cell receptors (TCRs) for peptide-major histocompatibility complexes (pMHCs) is a governing factor in how T cells respond to antigen. TCR avidity is generally linked to T cell functionality and there is growing evidence for distinct roles of low and high avidity T cells in different phases of immune responses. While physiological immune responses and many therapeutic T cell products targeting infections or cancers consist of polyclonal T cell populations with a wide range of individual avidities, the role of T cell avidity is usually investigated only in monoclonal experimental settings. In this report, we induced polyclonal T cell responses with a wide range of avidities towards a model epitope by altered peptide ligands (APL), and benchmarked global avidity of physiological polyclonal populations by investigation of TCR-pMHC koff -rates. We then investigated how varying sizes and avidities of monoclonal subpopulations translate into global koff -rates. Global koff -rates integrate subclonal avidities in a predictably weighted manner and robustly correlate with the functionality of murine polyclonal T cell populations in vitro and in vivo. Surveying the full avidity spectrum is essential to accurately assess polyclonal immune responses and inform the design of polyclonal T cell therapeutics. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Philipp Lückemeier
- Institute for Medical Microbiology, Immunology and Hygiene, Technische Universität München (TUM), Munich, Germany
| | - Katherine L Molter
- Institute for Medical Microbiology, Immunology and Hygiene, Technische Universität München (TUM), Munich, Germany
| | - Sebastian Jarosch
- Institute for Medical Microbiology, Immunology and Hygiene, Technische Universität München (TUM), Munich, Germany
| | - Patrick Huppertz
- Institute for Medical Microbiology, Immunology and Hygiene, Technische Universität München (TUM), Munich, Germany
| | - Anna Purcarea
- Institute for Medical Microbiology, Immunology and Hygiene, Technische Universität München (TUM), Munich, Germany
| | - Manuel J P Effenberger
- Institute for Medical Microbiology, Immunology and Hygiene, Technische Universität München (TUM), Munich, Germany
| | - Magdalena Nauerth
- Institute for Medical Microbiology, Immunology and Hygiene, Technische Universität München (TUM), Munich, Germany
| | - Elvira D'Ippolito
- Institute for Medical Microbiology, Immunology and Hygiene, Technische Universität München (TUM), Munich, Germany
| | - Kilian Schober
- Institute for Medical Microbiology, Immunology and Hygiene, Technische Universität München (TUM), Munich, Germany.,Mikrobiologisches Institut - Klinische Mikrobiologie, Immunologie und Hygiene, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Wasserturmstraße 3/5, D-91054, Erlangen, Germany
| | - Dirk H Busch
- Institute for Medical Microbiology, Immunology and Hygiene, Technische Universität München (TUM), Munich, Germany
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18
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The interplay between membrane topology and mechanical forces in regulating T cell receptor activity. Commun Biol 2022; 5:40. [PMID: 35017678 PMCID: PMC8752658 DOI: 10.1038/s42003-021-02995-1] [Citation(s) in RCA: 38] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 12/21/2021] [Indexed: 12/20/2022] Open
Abstract
T cells are critically important for host defense against infections. T cell activation is specific because signal initiation requires T cell receptor (TCR) recognition of foreign antigen peptides presented by major histocompatibility complexes (pMHC) on antigen presenting cells (APCs). Recent advances reveal that the TCR acts as a mechanoreceptor, but it remains unclear how pMHC/TCR engagement generates mechanical forces that are converted to intracellular signals. Here we propose a TCR Bending Mechanosignal (TBM) model, in which local bending of the T cell membrane on the nanometer scale allows sustained contact of relatively small pMHC/TCR complexes interspersed among large surface receptors and adhesion molecules on the opposing surfaces of T cells and APCs. Localized T cell membrane bending is suggested to increase accessibility of TCR signaling domains to phosphorylation, facilitate selective recognition of agonists that form catch bonds, and reduce noise signals associated with slip bonds. Al-Aghbar et al propose a TCR bending mechanosignal model that demonstrates how local mechanical membrane bending may influence T cell receptor binding events and thus T-cell activation.
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19
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Whittington KB, Prislovsky A, Beaty J, Albritton L, Radic M, Rosloniec EF. CD8 + T Cells Expressing an HLA-DR1 Chimeric Antigen Receptor Target Autoimmune CD4 + T Cells in an Antigen-Specific Manner and Inhibit the Development of Autoimmune Arthritis. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2022; 208:16-26. [PMID: 34819392 PMCID: PMC8702470 DOI: 10.4049/jimmunol.2100643] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 10/22/2021] [Indexed: 01/03/2023]
Abstract
Ag-specific immunotherapy is a long-term goal for the treatment of autoimmune diseases; however developing a means of therapeutically targeting autoimmune T cells in an Ag-specific manner has been difficult. Through the engineering of an HLA-DR1 chimeric Ag receptor (CAR), we have produced CD8+ CAR T cells that target CD4+ T cells in an Ag-specific manner and tested their ability to inhibit the development of autoimmune arthritis in a mouse model. The DR1 CAR molecule was engineered to contain CD3ζ activation and CD28 signaling domains and a covalently linked autoantigenic peptide from type II collagen (CII; DR1-CII) to provide specificity for targeting the autoimmune T cells. Stimulation of the DR1-CII CAR T cells by an anti-DR Ab induced cytokine production, indicating that the DR1-CAR functions as a chimeric molecule. In vitro CTL assays using cloned CD4+ T cells as target cells demonstrated that the DR1-CII CAR T cells efficiently recognize and kill CD4+ T cells that are specific for the CII autoantigen. The CTL function was highly specific, as no killing was observed using DR1-restricted CD4+ T cells that recognize other Ags. When B6.DR1 mice, in which autoimmune arthritis had been induced, were treated with the DR1-CII CAR T cells, the CII-specific autoimmune CD4+ T cell response was significantly decreased, autoantibody production was suppressed, and the incidence and severity of the autoimmune arthritis was diminished. These data demonstrate that HLA-DR CAR T cells have the potential to provide a highly specific therapeutic approach for the treatment of autoimmune disease.
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Affiliation(s)
| | | | - Jacob Beaty
- Department of Medicine, Immunology and Biochemistry, University of Tennessee Health Science Center, Memphis TN 38163
| | - Lorraine Albritton
- Department of Microbiology, Immunology and Biochemistry, University of Tennessee Health Science Center, Memphis TN 38163
| | - Marko Radic
- Department of Microbiology, Immunology and Biochemistry, University of Tennessee Health Science Center, Memphis TN 38163
| | - Edward F. Rosloniec
- Veterans Affairs Medical Center, Memphis TN 38104,Department of Medicine, Immunology and Biochemistry, University of Tennessee Health Science Center, Memphis TN 38163,Department of Pathology, Immunology and Biochemistry, University of Tennessee Health Science Center, Memphis TN 38163
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20
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T cell receptor (TCR) signaling in health and disease. Signal Transduct Target Ther 2021; 6:412. [PMID: 34897277 PMCID: PMC8666445 DOI: 10.1038/s41392-021-00823-w] [Citation(s) in RCA: 133] [Impact Index Per Article: 44.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 11/02/2021] [Accepted: 11/02/2021] [Indexed: 12/18/2022] Open
Abstract
Interaction of the T cell receptor (TCR) with an MHC-antigenic peptide complex results in changes at the molecular and cellular levels in T cells. The outside environmental cues are translated into various signal transduction pathways within the cell, which mediate the activation of various genes with the help of specific transcription factors. These signaling networks propagate with the help of various effector enzymes, such as kinases, phosphatases, and phospholipases. Integration of these disparate signal transduction pathways is done with the help of adaptor proteins that are non-enzymatic in function and that serve as a scaffold for various protein-protein interactions. This process aids in connecting the proximal to distal signaling pathways, thereby contributing to the full activation of T cells. This review provides a comprehensive snapshot of the various molecules involved in regulating T cell receptor signaling, covering both enzymes and adaptors, and will discuss their role in human disease.
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21
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Schreiber S, Honz M, Mamozai W, Kurktschiev P, Schiemann M, Witter K, Moore E, Zielinski C, Sette A, Protzer U, Wisskirchen K. Characterization of a library of 20 HBV-specific MHC class II-restricted T cell receptors. Mol Ther Methods Clin Dev 2021; 23:476-489. [PMID: 34853796 PMCID: PMC8605085 DOI: 10.1016/j.omtm.2021.10.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 09/27/2021] [Accepted: 10/27/2021] [Indexed: 02/07/2023]
Abstract
CD4+ T cells play an important role in the immune response against cancer and infectious diseases. However, mechanistic details of their helper function in hepatitis B virus (HBV) infection in particular, or their advantage for adoptive T cell therapy remain poorly understood as experimental and therapeutic tools are missing. Therefore, we identified, cloned, and characterized a comprehensive library of 20 MHC class II-restricted HBV-specific T cell receptors (TCRs) from donors with acute or resolved HBV infection. The TCRs were restricted by nine different MHC II molecules and specific for eight different epitopes derived from intracellularly processed HBV envelope, core, and polymerase proteins. Retroviral transduction resulted in a robust expression of all TCRs on primary T cells. A high functional avidity was measured for all TCRs specific for epitopes S17, S21, S36, and P774 (half-maximal effective concentration [EC50] <10 nM), or C61 and preS9 (EC50 <100 nM). Eight TCRs recognized peptide variants of HBV genotypes A to D. Both CD4+ and CD8+ T cells transduced with the MHC II-restricted TCRs were polyfunctional, producing interferon (IFN)-γ, tumor necrosis factor (TNF)-α, interleukin (IL)-2, and granzyme B (GrzB), and killed peptide-loaded target cells. Our set of MHC class II-restricted TCRs represents an important tool for elucidating CD4+ T cell help in viral infection with potential benefit for T cell therapy.
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22
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Ye R, Song W, Feng M, Zhou R. Potential interference of graphene nanosheets in immune response via disrupting the recognition of HLA-presented KK10 by TCR: a molecular dynamics simulation study. NANOSCALE 2021; 13:19255-19263. [PMID: 34787621 DOI: 10.1039/d1nr05267e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Graphene and its derivatives have emerged as a promising nanomaterial in biomedical applications. However, their impact on biosafety continues to be a concern in the field, particularly, their potential cytotoxicity to our immune system. In this study, we used all-atom molecular dynamics simulations to investigate the potential interference of graphene nanosheets in antigen presentation and recognition in immune response. For the illustrated human immunodeficiency virus (HIV) antigen peptide KK10, human leukocyte antigen (HLA), and T cell receptor (TCR) ternary complex, we found that the graphene nanosheet could disrupt the critical protein-protein interactions between TCR and peptide-HLA and impair the antigen recognition by TCR, leaving the antigen presentation unaffected. Moreover, the hydrophobic interaction and van der Waals potential energy collectively drive the spontaneous separation of TCR from the peptide-HLA complex by graphene nanosheets. Our findings demonstrated theoretically how the graphene nanosheet could interfere with the immune response and provided useful insights for reducing the risk of graphene-based nanomaterials in biomedical applications.
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Affiliation(s)
- Rui Ye
- Institute of Quantitative Biology, Department of Physics, and College of Life Sciences, Zhejiang University, Hangzhou 310027, China.
| | - Wei Song
- Institute of Quantitative Biology, Department of Physics, and College of Life Sciences, Zhejiang University, Hangzhou 310027, China.
| | - Mei Feng
- Institute of Quantitative Biology, Department of Physics, and College of Life Sciences, Zhejiang University, Hangzhou 310027, China.
- Lanzhou Center for Theoretical Physics, Key Laboratory of Theoretical Physics of Gansu Province, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Ruhong Zhou
- Institute of Quantitative Biology, Department of Physics, and College of Life Sciences, Zhejiang University, Hangzhou 310027, China.
- Department of Chemistry, Columbia University, New York, 10027, USA
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23
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Liu Q, Tian Y, Li Y, Zhang W, Cai W, Liu Y, Ren Y, Liang Z, Zhou P, Zhang Y, Bao Y, Li Y. In vivo therapeutic effects of affinity-improved-TCR engineered T-cells on HBV-related hepatocellular carcinoma. J Immunother Cancer 2021; 8:jitc-2020-001748. [PMID: 33323464 PMCID: PMC7745518 DOI: 10.1136/jitc-2020-001748] [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] [Accepted: 11/15/2020] [Indexed: 12/24/2022] Open
Abstract
Background In patients with hepatitis B virus (HBV)-related hepatocellular carcinoma (HCC), virus-specific cytotoxic T lymphocytes (CTLs) fail to eliminate HCC cells expressing HBV antigens. As the expression of viral antigen in HBV-associated HCC may decrease to allow tumor to escape immune attacks, we hypothesized that an HBV surface antigen (HBsAg)-specific affinity-improved-T-cell receptor (TCR) will enable T cells to target HCC more effectively than corresponding wild-type-TCR. We also postulated that TCR promiscuity can be exploited to efficiently capture HBV variants that can hinder CTL-based therapeutics. Methods We applied flexi-panning to isolate affinity-improved TCRs binding to a variant antigen, the human leukocyte antigen (HLA)-A*02:01-restricted nonapeptide HBs371-379-ILSPFLPLL, from libraries constructed with a TCR cloned using the decapeptide HBs370-379-SIVSPFIPLL. The potency and safety of the affinity-improved-TCR engineered T-cells (Ai-TCR-T) were verified with potentially cross-reactive human and HBV-variant peptides, tumor and normal cells, and xenograft mouse models. Results Ai-TCR-T cells retained cognate HBV antigen specificity and recognized a wide range of HBV genotypic variants with improved sensitivity and cytotoxicity. Cell infusions produced complete elimination of HCC without recurrence in the xenograft mouse models. Elevated accumulation of CD8+ Ai-TCR-T cells in tumors correlated with tumor shrinkage. Conclusion The in vitro and in vivo studies demonstrated that HBsAg-specific Ai-TCR-T cells had safety profiles similar to those of their wild-type counterparts and significantly enhanced potency. This study presents an approach to develop new therapeutic strategies for HBV-related HCC.
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Affiliation(s)
- Qi Liu
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Guangzhou, China.,University of the Chinese Academy of Sciences, Beijing, China
| | - Ye Tian
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Guangzhou, China
| | - Yanyan Li
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Guangzhou, China
| | - Wei Zhang
- Hefei Institute of Stem Cell and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Hefei, Anhui, China
| | - Wenxuan Cai
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Guangzhou, China
| | - Yaju Liu
- Hefei Institute of Stem Cell and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Hefei, Anhui, China
| | - Yuefei Ren
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Guangzhou, China.,School of Life Sciences, University of Science and Technology of China, Hefei, Anhui, China
| | - Zhaoduan Liang
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Guangzhou, China
| | - Peipei Zhou
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Guangzhou, China.,Institute of Physical Science and Information Technology, Anhui University, Hefei, Anhui, China
| | - Yajing Zhang
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Guangzhou, China.,University of the Chinese Academy of Sciences, Beijing, China
| | - Yifeng Bao
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Guangzhou, China
| | - Yi Li
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Guangzhou, China .,University of the Chinese Academy of Sciences, Beijing, China
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24
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McDaid WJ, Lissin N, Pollheimer E, Greene M, Leach A, Smyth P, Bossi G, Longley D, Cole DK, Scott CJ. Enhanced target-specific delivery of docetaxel-loaded nanoparticles using engineered T cell receptors. NANOSCALE 2021; 13:15010-15020. [PMID: 34533174 PMCID: PMC8447836 DOI: 10.1039/d1nr04001d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 08/18/2021] [Indexed: 06/13/2023]
Abstract
For effective targeted therapy of cancer with chemotherapy-loaded nanoparticles (NPs), antigens that are selective for cancer cells should be targeted to minimise off-tumour toxicity. Human leukocyte antigens (HLAs) are attractive cancer targets as they can present peptides from tumour-selective proteins on the cell surface, which can be recognised by T cells via T cell receptors (TCRs). In this study, docetaxel-loaded polymeric NPs were conjugated to recombinant affinity-enhanced TCRs to target breast cancer cells presenting a tumour-selective peptide-HLA complex. The TCR-conjugated nanoparticles enabled enhanced delivery of docetaxel and induced cell death through tumour-specific peptide-HLA targeting. These in vitro data demonstrate the potential of targeting tumour-restricted peptide-HLA epitopes using high affinity TCR-conjugated nanoparticles, representing a novel treatment strategy to deliver therapeutic drugs specifically to cancer cells.
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Affiliation(s)
- William J McDaid
- The Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK, BT9 7AE.
- Cancer Research UK Manchester Institute, Alderley Park, Congleton Rd, Alderley Edge, Macclesfield, UK, SK10 4TG
| | - Nikolai Lissin
- Immunocore Ltd, 101 Park Dr, Milton, Abingdon, United Kingdom OX14 4RY
| | - Ellen Pollheimer
- The Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK, BT9 7AE.
| | - Michelle Greene
- The Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK, BT9 7AE.
| | - Adam Leach
- The Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK, BT9 7AE.
- Institute of Cancer Research, 15 Cotswold Rd, Sutton, London, SM2 5NG, UK
| | - Peter Smyth
- The Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK, BT9 7AE.
| | - Giovanna Bossi
- Immunocore Ltd, 101 Park Dr, Milton, Abingdon, United Kingdom OX14 4RY
| | - Daniel Longley
- The Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK, BT9 7AE.
| | - David K Cole
- Immunocore Ltd, 101 Park Dr, Milton, Abingdon, United Kingdom OX14 4RY
| | - Christopher J Scott
- The Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK, BT9 7AE.
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25
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Tang H, Jiang X, Zhang J, Pei C, Zhao X, Li L, Kong X. Teleost CD4 + helper T cells: Molecular characteristics and functions and comparison with mammalian counterparts. Vet Immunol Immunopathol 2021; 240:110316. [PMID: 34474261 DOI: 10.1016/j.vetimm.2021.110316] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 06/21/2021] [Accepted: 08/24/2021] [Indexed: 12/24/2022]
Abstract
CD4+ helper T cells play key and diverse roles in inducing adaptive immune responses in vertebrates. The CD4 molecule, which is found on the surfaces of CD4+ helper T cells, can be used to distinguish subsets of helper T cells. Teleosts are the oldest living species with bona-fide CD4 coreceptors. Although some components of immune systems of teleosts and mammals appear to be similar, many physiological differences are represented between them. Previous studies have shown that two CD4 paralogs are present in teleosts, whereas only one is present in mammals. Therefore, in this review, the CD4 molecular structure, expression profiles, subpopulations, and biological functions of teleost CD4+ helper T cells were summarized and compared with those of their mammalian counterparts to understand the differences in CD4 molecules between teleosts and mammals. This review provides suggestions for further studies on the CD4 molecular function and regulatory mechanism of CD4+ helper T cells in teleost fish and will help establish therapeutic strategies to control fish diseases in the future.
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Affiliation(s)
- Hairong Tang
- College of Life Science, Henan Normal University, Henan Province, PR China; Engineering Lab of Henan Province for Aquatic Animal Disease Control, College of Fisheries, Henan Normal University, Henan Province, PR China
| | - Xinyu Jiang
- Engineering Lab of Henan Province for Aquatic Animal Disease Control, College of Fisheries, Henan Normal University, Henan Province, PR China
| | - Jie Zhang
- Engineering Lab of Henan Province for Aquatic Animal Disease Control, College of Fisheries, Henan Normal University, Henan Province, PR China
| | - Chao Pei
- Engineering Lab of Henan Province for Aquatic Animal Disease Control, College of Fisheries, Henan Normal University, Henan Province, PR China
| | - Xianliang Zhao
- Engineering Lab of Henan Province for Aquatic Animal Disease Control, College of Fisheries, Henan Normal University, Henan Province, PR China
| | - Li Li
- Engineering Lab of Henan Province for Aquatic Animal Disease Control, College of Fisheries, Henan Normal University, Henan Province, PR China
| | - Xianghui Kong
- College of Life Science, Henan Normal University, Henan Province, PR China; Engineering Lab of Henan Province for Aquatic Animal Disease Control, College of Fisheries, Henan Normal University, Henan Province, PR China.
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26
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Lankipalli S, H S MS, Selvam D, Samanta D, Nair D, Ramagopal UA. Cryptic association of B7-2 molecules and its implication for clustering. Protein Sci 2021; 30:1958-1973. [PMID: 34191384 PMCID: PMC8376414 DOI: 10.1002/pro.4151] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 06/16/2021] [Accepted: 06/22/2021] [Indexed: 12/23/2022]
Abstract
T-cell co-stimulation through CD28/CTLA4:B7-1/B7-2 axis is one of the extensively studied pathways that resulted in the discovery of several FDA-approved drugs for autoimmunity and cancer. However, many aspects of the signaling mechanism remain elusive, including oligomeric association and clustering of B7-2 on the cell surface. Here, we describe the structure of the IgV domain of B7-2 and its cryptic association into 1D arrays that appear to represent the pre-signaling state of B7-2 on the cell membrane. Super-resolution microscopy experiments on heterologous cells expressing B7-2 and B7-1 suggest, B7-2 form relatively elongated and larger clusters compared to B7-1. The sequence and structural comparison of other B7 family members, B7-1:CTLA4 and B7-2:CTLA-4 complex structures, support our view that the observed B7-2 1D zipper array is physiologically important. This observed 1D zipper-like array also provides an explanation for its clustering, and upright orientation on the cell surface, and avoidance of spurious signaling.
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Affiliation(s)
- Swetha Lankipalli
- Biological Sciences DivisionPoornaprajna Institute of Scientific Research (PPISR)BengaluruIndia
- Manipal Academy of Higher EducationManipalKarnatakaIndia
| | | | - Deepak Selvam
- Jawaharlal Nehru Center for Advance Scientific ResearchBengaluruKarnatakaIndia
- National Institute for Research in TuberculosisChennaiIndia
| | - Dibyendu Samanta
- School of Bioscience, Sir J. C. Bose Laboratory ComplexIndian Institute of Technology KharagpurKharagpurIndia
| | - Deepak Nair
- Centre for NeuroscienceIndian Institute of ScienceBangaloreIndia
| | - Udupi A. Ramagopal
- Biological Sciences DivisionPoornaprajna Institute of Scientific Research (PPISR)BengaluruIndia
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27
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Khan M, Arooj S, Wang H. Soluble B7-CD28 Family Inhibitory Immune Checkpoint Proteins and Anti-Cancer Immunotherapy. Front Immunol 2021; 12:651634. [PMID: 34531847 PMCID: PMC8438243 DOI: 10.3389/fimmu.2021.651634] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Accepted: 08/04/2021] [Indexed: 12/12/2022] Open
Abstract
Co-inhibitory B7-CD28 family member proteins negatively regulate T cell responses and are extensively involved in tumor immune evasion. Blockade of classical CTLA-4 (cytotoxic T lymphocyte-associated antigen-4) and PD-1 (programmed cell death protein-1) checkpoint pathways have become the cornerstone of anti-cancer immunotherapy. New inhibitory checkpoint proteins such as B7-H3, B7-H4, and BTLA (B and T lymphocyte attenuator) are being discovered and investigated for their potential in anti-cancer immunotherapy. In addition, soluble forms of these molecules also exist in sera of healthy individuals and elevated levels are found in chronic infections, autoimmune diseases, and cancers. Soluble forms are generated by proteolytic shedding or alternative splicing. Elevated circulating levels of these inhibitory soluble checkpoint molecules in cancer have been correlated with advance stage, metastatic status, and prognosis which underscore their broader involvement in immune regulation. In addition to their potential as biomarker, understanding their mechanism of production, biological activity, and pathological interactions may also pave the way for their clinical use as a therapeutic target. Here we review these aspects of soluble checkpoint molecules and elucidate on their potential for anti-cancer immunotherapy.
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Affiliation(s)
- Muhammad Khan
- Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei, China
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Medical University, Hefei, China
| | - Sumbal Arooj
- Department of Biochemistry, University of Sialkot, Sialkot, Pakistan
| | - Hua Wang
- Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei, China
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Medical University, Hefei, China
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28
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Banik D, Hamidinia M, Brzostek J, Wu L, Stephens HM, MacAry PA, Reinherz EL, Gascoigne NRJ, Lang MJ. Single Molecule Force Spectroscopy Reveals Distinctions in Key Biophysical Parameters of αβ T-Cell Receptors Compared with Chimeric Antigen Receptors Directed at the Same Ligand. J Phys Chem Lett 2021; 12:7566-7573. [PMID: 34347491 PMCID: PMC9082930 DOI: 10.1021/acs.jpclett.1c02240] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Chimeric antigen receptor (CAR) T-cell therapies exploit facile antibody-mediated targeting to elicit useful immune responses in patients. This work directly compares binding profiles of CAR and αβ T-cell receptors (TCR) with single cell and single molecule optical trap measurements against a shared ligand. DNA-tethered measurements of peptide-major histocompatibility complex (pMHC) ligand interaction in both CAR and TCR exhibit catch bonds with specific peptide agonist peaking at 25 and 14 pN, respectively. While a conformational transition is regularly seen in TCR-pMHC systems, that of CAR-pMHC systems is dissimilar, being infrequent, of lower magnitude, and irreversible. Slip bonds are observed with CD19-specific CAR T-cells and with a monoclonal antibody mapping to the MHC α2 helix but indifferent to the bound peptide. Collectively, these findings suggest that the CAR-pMHC interface underpins the CAR catch bond response to pMHC ligands in contradistinction to slip bonds for CARs targeting canonical ligands.
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Affiliation(s)
- Debasis Banik
- Department
of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Maryam Hamidinia
- Translational
Immunology Research Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Singapore
- Translational
Cancer Research Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Singapore
- Department
of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Singapore
| | - Joanna Brzostek
- Translational
Immunology Research Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Singapore
- Translational
Cancer Research Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Singapore
- Department
of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Singapore
| | - Ling Wu
- Translational
Immunology Research Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Singapore
- Translational
Cancer Research Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Singapore
- Department
of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Singapore
| | - Hannah M. Stephens
- Department
of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Paul A. MacAry
- Translational
Immunology Research Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Singapore
- Translational
Cancer Research Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Singapore
- Department
of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Singapore
| | - Ellis L. Reinherz
- Laboratory
of Immunobiology, Dana-Farber Cancer Institute, Boston, Massachusetts 02115, United States
- Department
of Medical Oncology, Dana-Farber Cancer Institute and Department of
Medicine, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Nicholas R. J. Gascoigne
- Translational
Immunology Research Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Singapore
- Translational
Cancer Research Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Singapore
- Department
of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Singapore
| | - Matthew J. Lang
- Department
of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee 37235, United States
- Department
of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, Tennessee 37235, United States
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29
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Lattice Light-Sheet Microscopy Multi-dimensional Analyses (LaMDA) of T-Cell Receptor Dynamics Predict T-Cell Signaling States. Cell Syst 2021; 10:433-444.e5. [PMID: 32437685 DOI: 10.1016/j.cels.2020.04.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 02/29/2020] [Accepted: 04/21/2020] [Indexed: 12/19/2022]
Abstract
Lattice light-sheet microscopy provides large amounts of high-dimensional, high-spatiotemporal resolution imaging data of cell surface receptors across the 3D surface of live cells, but user-friendly analysis pipelines are lacking. Here, we introduce lattice light-sheet microscopy multi-dimensional analyses (LaMDA), an end-to-end pipeline comprised of publicly available software packages that combines machine learning, dimensionality reduction, and diffusion maps to analyze surface receptor dynamics and classify cellular signaling states without the need for complex biochemical measurements or other prior information. We use LaMDA to analyze images of T-cell receptor (TCR) microclusters on the surface of live primary T cells under resting and stimulated conditions. We observe global spatial and temporal changes of TCRs across the 3D cell surface, accurately differentiate stimulated cells from unstimulated cells, precisely predict attenuated T-cell signaling after CD4 and CD28 receptor blockades, and reliably discriminate between structurally similar TCR ligands. All instructions needed to implement LaMDA are included in this paper.
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30
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Shenderov E, Kandasamy M, Gileadi U, Chen J, Shepherd D, Gibbs J, Prota G, Silk JD, Yewdell JW, Cerundolo V. Generation and characterization of HLA-A2 transgenic mice expressing the human TCR 1G4 specific for the HLA-A2 restricted NY-ESO-1 157-165 tumor-specific peptide. J Immunother Cancer 2021; 9:jitc-2021-002544. [PMID: 34088742 PMCID: PMC8183295 DOI: 10.1136/jitc-2021-002544] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/16/2021] [Indexed: 01/07/2023] Open
Abstract
Background NY-ESO-1 is a tumor-specific, highly immunogenic, human germ cell antigen of the MAGE-1 family that is a promising vaccine and cell therapy candidate in clinical trial development. The mouse genome does not encode an NY-ESO-1 homolog thereby not subjecting transgenic T-cells to thymic tolerance mechanisms that might impair in-vivo studies. We hypothesized that an NY-ESO-1 T cell receptor (TCR) transgenic mouse would provide the unique opportunity to study avidity of TCR response against NY-ESO-1 for tumor vaccine and cellular therapy development against this clinically relevant and physiological human antigen. Methods To study in vitro and in vivo the requirements for shaping an effective T cell response against the clinically relevant NY-ESO-1, we generated a C57BL/6 HLA-A*0201 background TCR transgenic mouse encoding the 1G4 TCR specific for the human HLA-A2 restricted, NY-ESO-1157-165 SLLMWITQC (9C), initially identified in an NY-ESO-1 positive melanoma patient. Results The HLA-A*0201 restricted TCR was positively selected on both CD4+ and CD8+ cells. Mouse 1G4 T cells were not activated by endogenous autoimmune targets or a large library of non-cognate viral antigens. In contrast, their activation by HLA-A2 NY-ESO-1157-165 complexes was evident by proliferation, CD69 upregulation, interferon-γ production, and interleukin-2 production, and could be tuned using a twofold higher affinity altered peptide ligand, NY-ESO-1157-165V. NY-ESO-1157-165V recombinant vaccination of syngeneic mice adoptively transferred with m1G4 CD8+ T cells controlled tumor growth in vivo. 1G4 transgenic mice suppressed growth of syngeneic methylcholanthrene (MCA) induced HHD tumor cells expressing the full-length human NY-ESO-1 protein but not MCA HHD tumor cells lacking NY-ESO-1. Conclusions The 1G4 TCR mouse model for the physiological human TCR against the clinically relevant antigen, NY-ESO-1, is a valuable tool with the potential to accelerate clinical development of NY-ESO-1-targeted T-cell and vaccine therapies.
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Affiliation(s)
- Eugene Shenderov
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, Oxford, UK .,National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA.,Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins University, Baltimore, MD, USA
| | - Matheswaran Kandasamy
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, Oxford, UK
| | - Uzi Gileadi
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, Oxford, UK
| | - Jili Chen
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, Oxford, UK
| | - Dawn Shepherd
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, Oxford, UK
| | - James Gibbs
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Gennaro Prota
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, Oxford, UK
| | - Jonathan D Silk
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, Oxford, UK.,Next Generation Research, Adaptimmune, Abingdon, UK
| | - Jonathan W Yewdell
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Vincenzo Cerundolo
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, Oxford, UK
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31
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Xiao Z, Kandel A, Li L. Synergistic Activation of Bovine CD4+ T Cells by Neutrophils and IL-12. Pathogens 2021; 10:pathogens10060694. [PMID: 34204973 PMCID: PMC8228106 DOI: 10.3390/pathogens10060694] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Revised: 05/27/2021] [Accepted: 05/29/2021] [Indexed: 12/12/2022] Open
Abstract
CD4+ T cell activation requires inflammatory cytokines to provide a third signal (3SI), such as interleukin-12 (IL-12). We recently reported that bovine neutrophils can enhance the activation of bovine CD4+ T cells. To explore the interactions between neutrophils and third signal cytokines in bovine CD4+ T cell activation, naïve CD4+ T cells were isolated from cattle lymph nodes and stimulated for 3.5 days with anti-bovine CD3 (first signal; 1SI), anti-bovine CD28 (second signal; 2SI), and recombinant human IL-12 (3SI) in the presence or absence of neutrophils harvested from the same animals. Indeed, the strongest activation was achieved in the presence of all three signals, as demonstrated by CD25 upregulation, IFNγ production in CD4+ T cells, and secretion of IFNγ and IL-2 in cell supernatants. More importantly, 1SI plus neutrophils led to enhanced CD25 expression that was further increased by IL-12, suggesting synergistic action by IL-12 and neutrophils. Consistently, neutrophils significantly increased IFNγ production in 1SI plus IL-12-stimulated CD4+ T cells. Our data suggest the synergy of neutrophils and IL-12 as a novel regulator on bovine CD4+ T cell activation in addition to three signals. This knowledge could assist the development of immune interventions for the control of infectious diseases in cattle.
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32
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Pettmann J, Huhn A, Abu Shah E, Kutuzov MA, Wilson DB, Dustin ML, Davis SJ, van der Merwe PA, Dushek O. The discriminatory power of the T cell receptor. eLife 2021; 10:67092. [PMID: 34030769 PMCID: PMC8219380 DOI: 10.7554/elife.67092] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Accepted: 05/15/2021] [Indexed: 12/20/2022] Open
Abstract
T cells use their T cell receptors (TCRs) to discriminate between lower-affinity self and higher-affinity non-self peptides presented on major histocompatibility complex (pMHC) antigens. Although the discriminatory power of the TCR is widely believed to be near-perfect, technical difficulties have hampered efforts to precisely quantify it. Here, we describe a method for measuring very low TCR/pMHC affinities and use it to measure the discriminatory power of the TCR and the factors affecting it. We find that TCR discrimination, although enhanced compared with conventional cell-surface receptors, is imperfect: primary human T cells can respond to pMHC with affinities as low as KD ∼ 1 mM. The kinetic proofreading mechanism fit our data, providing the first estimates of both the time delay (2.8 s) and number of biochemical steps (2.67) that are consistent with the extraordinary sensitivity of antigen recognition. Our findings explain why self pMHC frequently induce autoimmune diseases and anti-tumour responses, and suggest ways to modify TCR discrimination.
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Affiliation(s)
- Johannes Pettmann
- Sir William Dunn School of Pathology, University of Oxford, Oxford, United Kingdom.,Radcliffe Department of Medicine, Medical Research Council Human Immunology Unit, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, United Kingdom
| | - Anna Huhn
- Sir William Dunn School of Pathology, University of Oxford, Oxford, United Kingdom
| | - Enas Abu Shah
- Sir William Dunn School of Pathology, University of Oxford, Oxford, United Kingdom.,Kennedy Institute of Rheumatology, University of Oxford, Oxford, United Kingdom
| | - Mikhail A Kutuzov
- Sir William Dunn School of Pathology, University of Oxford, Oxford, United Kingdom
| | - Daniel B Wilson
- Sir William Dunn School of Pathology, University of Oxford, Oxford, United Kingdom.,Boston University, Department of Mathematics and Statistics, Boston, United States
| | - Michael L Dustin
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, United Kingdom
| | - Simon J Davis
- Radcliffe Department of Medicine, Medical Research Council Human Immunology Unit, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, United Kingdom
| | | | - Omer Dushek
- Sir William Dunn School of Pathology, University of Oxford, Oxford, United Kingdom
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33
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Bingöl EN, Serçinoğlu O, Ozbek P. Unraveling the Allosteric Communication Mechanisms in T-Cell Receptor-Peptide-Loaded Major Histocompatibility Complex Dynamics Using Molecular Dynamics Simulations: An Approach Based on Dynamic Cross Correlation Maps and Residue Interaction Energy Calculations. J Chem Inf Model 2021; 61:2444-2453. [PMID: 33930270 DOI: 10.1021/acs.jcim.1c00338] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Antigen presentation by major histocompatibility complex (MHC) proteins to T-cell receptors (TCRs) plays a crucial role in triggering the adaptive immune response. Most of our knowledge on TCR-peptide-loaded major histocompatibility complex (pMHC) interaction stemmed from experiments yielding static structures, yet the dynamic aspects of this molecular interaction are equally important to understand the underlying molecular mechanisms and to develop treatment strategies against diseases such as cancer and autoimmune diseases. To this end, computational biophysics studies including all-atom molecular dynamics simulations have provided useful insights; however, we still lack a basic understanding of an overall allosteric mechanism that results in conformational changes in the TCR and subsequent T-cell activation. Previous hydrogen-deuterium exchange and nuclear magnetic resonance studies provided clues regarding these molecular mechanisms, including global rigidification and allosteric effects on the constant domain of TCRs away from the pMHC interaction site. Here, we show that molecular dynamics simulations can be used to identify how this overall rigidification may be related to the allosteric communication within TCRs upon pMHC interaction via essential dynamics and nonbonded residue-residue interaction energy analyses. The residues taking part in the rigidification effect are highlighted with an intricate analysis on residue interaction changes, which lead to a detailed outline of the complex formation event. Our results indicate that residues of the Cβ domain of TCRs show significant differences in their nonbonded interactions upon complex formation. Moreover, the dynamic cross correlations between these residues are also increased, in line with their nonbonded interaction energy changes. Altogether, our approach may be valuable for elucidating intramolecular allosteric changes in the TCR structure upon pMHC interaction in molecular dynamics simulations.
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Affiliation(s)
- Elif Naz Bingöl
- Department of Bioengineering, Institute of Pure and Applied Sciences, Marmara University, 34722 Istanbul, Turkey
| | - Onur Serçinoğlu
- Department of Bioengineering, Faculty of Engineering, Gebze Technical University, Kocaeli 41400, Turkey
| | - Pemra Ozbek
- Department of Bioengineering, Faculty of Engineering, Marmara University, Istanbul 34722, Turkey
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34
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The HLA System in Transfusion Medicine and Transplantation. Transfus Med 2021. [DOI: 10.1002/9781119599586.ch18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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35
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Parajuli P, Sable R, Shrestha L, Dahal A, Gauthier T, Taneja V, Jois S. Modulation of co-stimulatory signal from CD2-CD58 proteins by a grafted peptide. Chem Biol Drug Des 2021; 97:607-627. [PMID: 32946175 PMCID: PMC8717467 DOI: 10.1111/cbdd.13797] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 06/23/2020] [Accepted: 09/09/2020] [Indexed: 12/12/2022]
Abstract
Peptides were designed to inhibit the protein-protein interaction of CD2 and CD58 to modulate the immune response. This work involved the design and synthesis of eight different peptides by replacing each amino acid residue in peptide 6 with alanine as well as grafting the peptide to the sunflower trypsin-inhibitor framework. From the alanine scanning studies, mutation at position 2 of the peptide was shown to result in increased potency to inhibit cell adhesion interactions. The most potent peptide from the alanine scanning was further studied for its detailed three-dimensional structure and binding to CD58 protein using surface plasmon resonance and flow cytometry. This peptide was used to graft to the sunflower trypsin inhibitor to improve the stability of the peptide. The grafted peptide, SFTI-a1, was further studied for its potency as well as its thermal, chemical, and enzymatic stability. The grafted peptide exhibited improved activity compared to our previously grafted peptide and was stable against thermal and enzymatic degradation.
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Affiliation(s)
- Pravin Parajuli
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe LA 71201 USA
| | - Rushikesh Sable
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe LA 71201 USA
| | - Leeza Shrestha
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe LA 71201 USA
| | - Achyut Dahal
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe LA 71201 USA
| | - Ted Gauthier
- Biotechnology Laboratory, LSU AgCenter, Louisiana State University, Baton Rouge, LA 70803 USA
| | - Veena Taneja
- Department of Immunology, Mayo Clinic, Rochester, Minnesota 55905, USA
| | - Seetharama Jois
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe LA 71201 USA
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36
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Lee SY, Ko DH, Son MJ, Kim JA, Jung K, Kim YS. Affinity Maturation of a T-Cell Receptor-Like Antibody Specific for a Cytomegalovirus pp65-Derived Peptide Presented by HLA-A*02:01. Int J Mol Sci 2021; 22:ijms22052349. [PMID: 33652936 PMCID: PMC7956451 DOI: 10.3390/ijms22052349] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 02/22/2021] [Accepted: 02/23/2021] [Indexed: 12/14/2022] Open
Abstract
Human cytomegalovirus (CMV) infection is widespread among adults (60–90%) and is usually undetected in healthy individuals without symptoms but can cause severe diseases in immunocompromised hosts. T-cell receptor (TCR)-like antibodies (Abs), which recognize complex antigens (peptide–MHC complex, pMHC) composed of MHC molecules with embedded short peptides derived from intracellular proteins, including pathogenic viral proteins, can serve as diagnostic and/or therapeutic agents. In this study, we aimed to engineer a TCR-like Ab specific for pMHC comprising a CMV pp65 protein-derived peptide (495NLVPMVATV503; hereafter, CMVpp65495-503) in complex with MHC-I molecule human leukocyte antigen (HLA)-A*02:01 (CMVpp65495-503/HLA-A*02:01) to increase affinity by sequential mutagenesis of complementarity-determining regions using yeast surface display technology. Compared with the parental Ab, the final generated Ab (C1-17) showed ~67-fold enhanced binding affinity (KD ≈ 5.2 nM) for the soluble pMHC, thereby detecting the cell surface-displayed CMVpp65495-503/HLA-A*02:01 complex with high sensitivity and exquisite specificity. Thus, the new high-affinity TCR-like Ab may be used for the detection and treatment of CMV infection.
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Affiliation(s)
- Se-Young Lee
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Korea; (S.-Y.L.); (D.-H.K.); (M.-J.S.); (J.-A.K.)
| | - Deok-Han Ko
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Korea; (S.-Y.L.); (D.-H.K.); (M.-J.S.); (J.-A.K.)
| | - Min-Jeong Son
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Korea; (S.-Y.L.); (D.-H.K.); (M.-J.S.); (J.-A.K.)
| | - Jeong-Ah Kim
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Korea; (S.-Y.L.); (D.-H.K.); (M.-J.S.); (J.-A.K.)
| | - Keunok Jung
- Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon 16499, Korea;
| | - Yong-Sung Kim
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Korea; (S.-Y.L.); (D.-H.K.); (M.-J.S.); (J.-A.K.)
- Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon 16499, Korea;
- Correspondence: ; Tel.: +82-31-219-2662; Fax: +82-31-219-1610
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Johnson DK, Magoffin W, Myers SJ, Finnell JG, Hancock JC, Orton TS, Persaud SP, Christensen KA, Weber KS. CD4 Inhibits Helper T Cell Activation at Lower Affinity Threshold for Full-Length T Cell Receptors Than Single Chain Signaling Constructs. Front Immunol 2021; 11:561889. [PMID: 33542711 PMCID: PMC7851051 DOI: 10.3389/fimmu.2020.561889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Accepted: 11/30/2020] [Indexed: 11/13/2022] Open
Abstract
CD4+ T cells are crucial for effective repression and elimination of cancer cells. Despite a paucity of CD4+ T cell receptor (TCR) clinical studies, CD4+ T cells are primed to become important therapeutics as they help circumvent tumor antigen escape and guide multifactorial immune responses. However, because CD8+ T cells directly kill tumor cells, most research has focused on the attributes of CD8+ TCRs. Less is known about how TCR affinity and CD4 expression affect CD4+ T cell activation in full length TCR (flTCR) and TCR single chain signaling (TCR-SCS) formats. Here, we generated an affinity panel of TCRs from CD4+ T cells and expressed them in flTCR and three TCR-SCS formats modeled after chimeric antigen receptors (CARs) to understand the contributions of TCR-pMHCII affinity, TCR format, and coreceptor CD4 interactions on CD4+ T cell activation. Strikingly, the coreceptor CD4 inhibited intermediate and high affinity TCR-construct activation by Lck-dependent and -independent mechanisms. These inhibition mechanisms had unique affinity thresholds dependent on the TCR format. Intracellular construct formats affected the tetramer staining for each TCR as well as IL-2 production. IL-2 production was promoted by increased TCR-pMHCII affinity and the flTCR format. Thus, CD4+ T cell therapy development should consider TCR affinity, CD4 expression, and construct format.
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Affiliation(s)
- Deborah K Johnson
- Department of Microbiology and Molecular Biology, Brigham Young University, Provo, UT, United States
| | - Wyatt Magoffin
- Department of Microbiology and Molecular Biology, Brigham Young University, Provo, UT, United States
| | - Sheldon J Myers
- Department of Microbiology and Molecular Biology, Brigham Young University, Provo, UT, United States
| | - Jordan G Finnell
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT, United States
| | - John C Hancock
- Department of Microbiology and Molecular Biology, Brigham Young University, Provo, UT, United States
| | - Taylor S Orton
- Department of Microbiology and Molecular Biology, Brigham Young University, Provo, UT, United States
| | - Stephen P Persaud
- Division of Laboratory and Genomic Medicine, Department of Pathology and Immunology, Washington University in St. Louis, St. Louis, MO, United States
| | - Kenneth A Christensen
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT, United States
| | - K Scott Weber
- Department of Microbiology and Molecular Biology, Brigham Young University, Provo, UT, United States
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Glycan-to-Glycan Binding: Molecular Recognition through Polyvalent Interactions Mediates Specific Cell Adhesion. Molecules 2021; 26:molecules26020397. [PMID: 33451117 PMCID: PMC7828597 DOI: 10.3390/molecules26020397] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 12/26/2020] [Accepted: 01/08/2021] [Indexed: 12/22/2022] Open
Abstract
Glycan-to-glycan binding was shown by biochemical and biophysical measurements to mediate xenogeneic self-recognition and adhesion in sponges, stage-specific cell compaction in mice embryos, and in vitro tumor cell adhesion in mammals. This intermolecular recognition process is accepted as the new paradigm accompanying high-affinity and low valent protein-to-protein and protein-to-glycan binding in cellular interactions. Glycan structures in sponges have novel species-specific sequences. Their common features are the large size >100 kD, polyvalency >100 repeats of the specific self-binding oligosaccharide, the presence of fucose, and sulfated and/or pyruvylated hexoses. These structural and functional properties, different from glycosaminoglycans, inspired their classification under the glyconectin name. The molecular mechanism underlying homophilic glyconectin-to-glyconectin binding relies on highly polyvalent, strong, and structure-specific interactions of small oligosaccharide motifs, possessing ultra-weak self-binding strength and affinity. Glyconectin localization at the glycocalyx outermost cell surface layer suggests their role in the initial recognition and adhesion event during the complex and multistep process. In mammals, Lex-to-Lex homophilic binding is structure-specific and has ultra-weak affinity. Cell adhesion is achieved through highly polyvalent interactions, enabled by clustering of small low valent structure in plasma membranes.
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Mørch AM, Bálint Š, Santos AM, Davis SJ, Dustin ML. Coreceptors and TCR Signaling - the Strong and the Weak of It. Front Cell Dev Biol 2020; 8:597627. [PMID: 33178706 PMCID: PMC7596257 DOI: 10.3389/fcell.2020.597627] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 09/28/2020] [Indexed: 12/02/2022] Open
Abstract
The T-cell coreceptors CD4 and CD8 have well-characterized and essential roles in thymic development, but how they contribute to immune responses in the periphery is unclear. Coreceptors strengthen T-cell responses by many orders of magnitude - beyond a million-fold according to some estimates - but the mechanisms underlying these effects are still debated. T-cell receptor (TCR) triggering is initiated by the binding of the TCR to peptide-loaded major histocompatibility complex (pMHC) molecules on the surfaces of other cells. CD4 and CD8 are the only T-cell proteins that bind to the same pMHC ligand as the TCR, and can directly associate with the TCR-phosphorylating kinase Lck. At least three mechanisms have been proposed to explain how coreceptors so profoundly amplify TCR signaling: (1) the Lck recruitment model and (2) the pseudodimer model, both invoked to explain receptor triggering per se, and (3) two-step coreceptor recruitment to partially triggered TCRs leading to signal amplification. More recently it has been suggested that, in addition to initiating or augmenting TCR signaling, coreceptors effect antigen discrimination. But how can any of this be reconciled with TCR signaling occurring in the absence of CD4 or CD8, and with their interactions with pMHC being among the weakest specific protein-protein interactions ever described? Here, we review each theory of coreceptor function in light of the latest structural, biochemical, and functional data. We conclude that the oldest ideas are probably still the best, i.e., that their weak binding to MHC proteins and efficient association with Lck allow coreceptors to amplify weak incipient triggering of the TCR, without comprising TCR specificity.
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Affiliation(s)
- Alexander M. Mørch
- The Kennedy Institute of Rheumatology, University of Oxford, Oxford, United Kingdom
- Radcliffe Department of Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, United Kingdom
| | - Štefan Bálint
- The Kennedy Institute of Rheumatology, University of Oxford, Oxford, United Kingdom
| | - Ana Mafalda Santos
- Radcliffe Department of Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, United Kingdom
| | - Simon J. Davis
- Radcliffe Department of Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, United Kingdom
| | - Michael L. Dustin
- The Kennedy Institute of Rheumatology, University of Oxford, Oxford, United Kingdom
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40
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Veeramani S, Weiner GJ. Quantification of Receptor Occupancy by Ligand—An Understudied Class of Potential Biomarkers. Cancers (Basel) 2020; 12:cancers12102956. [PMID: 33066142 PMCID: PMC7601969 DOI: 10.3390/cancers12102956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 10/01/2020] [Indexed: 11/16/2022] Open
Abstract
Molecular complexes, such as ligand–receptor complexes, are vital for both health and disease and can be shed into the circulation in soluble form. Relatively little is known about the biology of soluble ligand–receptor complexes. The functional importance of such complexes and their potential use as clinical biomarkers in diagnosis and therapy remains underappreciated. Most traditional technologies used to study ligand–receptor complexes measure the individual levels of soluble ligands or receptors rather than the complexes themselves. The fraction of receptors occupied by ligand, and the potential clinical relevance of such information, has been largely overlooked. Here, we review the biological significance of soluble ligand–receptor complexes with a specific focus on their potential as biomarkers of cancer and other inflammatory diseases. In addition, we discuss a novel RNA aptamer-based technology, designated ligand–receptor complex-binding aptamers (LIRECAP), that can provide precise measurement of the fraction of a soluble receptor occupied by its ligand. The potential applicability of the LIRECAP technology as a biomarker discovery platform is also described.
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Affiliation(s)
- Suresh Veeramani
- Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA 52241, USA;
- Department of Internal Medicine, University of Iowa, Iowa City, IA 52241, USA
| | - George J. Weiner
- Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA 52241, USA;
- Department of Internal Medicine, University of Iowa, Iowa City, IA 52241, USA
- Correspondence:
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41
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Meng Q, Wu Y, Sui X, Meng J, Wang T, Lin Y, Wang Z, Zhou X, Qi Y, Du J, Gao Y. POTN: A Human Leukocyte Antigen-A2 Immunogenic Peptides Screening Model and Its Applications in Tumor Antigens Prediction. Front Immunol 2020; 11:02193. [PMID: 33133063 PMCID: PMC7579403 DOI: 10.3389/fimmu.2020.02193] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 08/11/2020] [Indexed: 12/23/2022] Open
Abstract
Whole genome/exome sequencing data for tumors are now abundant, and many tumor antigens, especially mutant antigens (neoantigens), have been identified for cancer immunotherapy. However, only a small fraction of the peptides from these antigens induce cytotoxic T cell responses. Therefore, efficient methods to identify these antigenic peptides are crucial. The current models of major histocompatibility complex (MHC) binding and antigenic prediction are still inaccurate. In this study, 360 9-mer peptides with verified immunological activity were selected to construct a prediction of tumor neoantigen (POTN) model, an immunogenic prediction model specifically for the human leukocyte antigen-A2 allele. Based on the physicochemical properties of amino acids, such as the residue propensity, hydrophobicity, and organic solvent/water, we found that the predictive capability of POTN is superior to that of the prediction programs SYPEITHI, IEDB, and NetMHCpan 4.0. We used POTN to screen peptides for the cancer-testis antigen located on the X chromosome, and we identified several peptides that may trigger immunogenicity. We synthesized and measured the binding affinity and immunogenicity of these peptides and found that the accuracy of POTN is higher than that of NetMHCpan 4.0. Identifying the properties related to the T cell response or immunogenicity paves the way to understanding the MHC/peptide/T cell receptor complex. In conclusion, POTN is an efficient prediction model for screening high-affinity immunogenic peptides from tumor antigens, and thus provides useful information for developing cancer immunotherapy.
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Affiliation(s)
- Qingqing Meng
- School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Yahong Wu
- School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Xinghua Sui
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Shenzhen, China
| | - Jingjie Meng
- School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Tingting Wang
- School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Yan Lin
- School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Zhiwei Wang
- School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Xiuman Zhou
- School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Yuanming Qi
- School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Jiangfeng Du
- School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Yanfeng Gao
- School of Life Sciences, Zhengzhou University, Zhengzhou, China.,School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Shenzhen, China
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42
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van 't Hof LJ, Dijkstra KL, van der Keur C, Eikmans M, Baelde HJ, Bos M, van der Hoorn MLP. Decreased expression of ligands of placental immune checkpoint inhibitors in uncomplicated and preeclamptic oocyte donation pregnancies. J Reprod Immunol 2020; 142:103194. [PMID: 32979711 DOI: 10.1016/j.jri.2020.103194] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Revised: 08/12/2020] [Accepted: 08/26/2020] [Indexed: 12/31/2022]
Abstract
Oocyte donation (OD) pregnancies are characterized by a complete immunogenetic dissimilarity between mother and fetus, which requires enhanced immunoregulation compared to naturally conceived (NC) pregnancies. The trophoblast expresses co-inhibitory ligands crucial for regulation of the maternal T cell response. Therefore, we studied the role of placental immune checkpoint inhibitors for the establishment of fetal tolerance and their relation to the development of preeclampsia in OD compared to NC pregnancies. Placental tissue from uncomplicated OD (n = 21) and NC (n = 21) pregnancies, and OD (n = 9) and NC (n = 15) pregnancies complicated with preeclampsia were studied. Protein expression of co-inhibitory ligands PD-L1 and CD200 was double blind semi-quantitatively determined by immunohistochemistry. Messenger RNA expression of PD-L1, CD200 and indoleamine 2,3-dioxygenase (IDO) was determined using qPCR. Decreased PD-L1 and CD200 protein expression and increased IDO mRNA expression was observed in uncomplicated OD versus NC pregnancies (all p < 0.05). CD200 protein expression was positively correlated with PD-L1 expression in all groups, with the number of HLA total mismatches and with HLA class I mismatches in uncomplicated OD cases (all p < 0.05). Preeclamptic cases showed lower PD-L1 protein and CD200 protein and mRNA expression in OD compared to NC pregnancies (all p < 0.05). This study shows that signaling by co-inhibitory PD-L1 and CD200 and by immunosuppressive IDO is altered in the placenta of OD pregnancies, suggesting a contribution to the higher risk for preeclampsia. These insights provide future prospects in unraveling the immune paradox of oocyte pregnancy, which are applicable for better risk management and treatment of uncomplicated and preeclamptic pregnancies.
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Affiliation(s)
- L J van 't Hof
- Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands; Department of Gynaecology and Obstetrics, Leiden University Medical Center, Leiden, The Netherlands
| | - K L Dijkstra
- Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands
| | - C van der Keur
- Department of Immunology, Leiden University Medical Center, Leiden, The Netherlands
| | - M Eikmans
- Department of Immunology, Leiden University Medical Center, Leiden, The Netherlands
| | - H J Baelde
- Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands
| | - M Bos
- Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands; Department of Gynaecology and Obstetrics, Leiden University Medical Center, Leiden, The Netherlands
| | - M L P van der Hoorn
- Department of Gynaecology and Obstetrics, Leiden University Medical Center, Leiden, The Netherlands.
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43
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Xing J, Tian HF, Tang XQ, Sheng XZ, Zhan WB. Kinetics of T lymphocyte subsets and B lymphocytes in response to immunostimulants in flounder (Paralichthys olivaceus): implications for CD4 + T lymphocyte differentiation. Sci Rep 2020; 10:13827. [PMID: 32796864 PMCID: PMC7429840 DOI: 10.1038/s41598-020-69542-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 06/12/2020] [Indexed: 01/22/2023] Open
Abstract
CD4+ T lymphocytes play crucial roles in the adaptive immune system. CD4, as the most effective marker to delineate the T-helper subsets, was identified in many fish species. Two CD4 homologs, CD4-1 and CD4-2, have been reported in flounder (Paralichthys olivaceus). In this study, monoclonal antibodies (mAbs) against CD4-1 and CD4-2 of flounder were produced, CD4+ T lymphocytes were isolated and identified, and the variations in CD4+ and CD8+ T lymphocytes and IgM+ B lymphocytes after Poly I:C, PMA or β-glucan stimulation were investigated. Then, the expression of transcription factors and cytokines in sorted CD4+ T lymphocytes was analyzed. The results showed that the mAbs were specific to flounder CD4-1+ and CD4-2+ T cells. CD4-1+ and CD4-2+ cells responded to all three stimulants, while CD8+ T lymphocytes only give a strong response to Poly I:C, and the percentages of IgM+ B lymphocytes showed a tendency to increase. After stimulation, the expression of transcription factors and cytokines of Th1, Th2 and Th17 cells varied in CD4+ T cells. These results will provide crucial foundations for the differentiation and function of teleost CD4+ T lymphocytes.
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Affiliation(s)
- Jing Xing
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao, 266003, People's Republic of China.,Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, No. 1 Wenhai Road, Aoshanwei Town, Qingdao, People's Republic of China
| | - Hong-Fei Tian
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao, 266003, People's Republic of China
| | - Xiao-Qian Tang
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao, 266003, People's Republic of China
| | - Xiu-Zhen Sheng
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao, 266003, People's Republic of China
| | - Wen-Bin Zhan
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao, 266003, People's Republic of China. .,Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, No. 1 Wenhai Road, Aoshanwei Town, Qingdao, People's Republic of China.
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44
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Coles CH, McMurran C, Lloyd A, Hock M, Hibbert L, Raman MCC, Hayes C, Lupardus P, Cole DK, Harper S. T cell receptor interactions with human leukocyte antigen govern indirect peptide selectivity for the cancer testis antigen MAGE-A4. J Biol Chem 2020; 295:11486-11494. [PMID: 32532817 PMCID: PMC7450119 DOI: 10.1074/jbc.ra120.014016] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 06/11/2020] [Indexed: 12/18/2022] Open
Abstract
T cell-mediated immunity is governed primarily by T cell receptor (TCR) recognition of peptide-human leukocyte antigen (pHLA) complexes and is essential for immunosurveillance and disease control. This interaction is generally stabilized by interactions between the HLA surface and TCR germline-encoded complementarity-determining region (CDR) loops 1 and 2, whereas peptide selectivity is guided by direct interactions with the TCR CDR3 loops. Here, we solved the structure of a newly identified TCR in complex with a clinically relevant peptide derived from the cancer testis antigen melanoma antigen-A4 (MAGE-A4). The TCR bound pHLA in a position shifted toward the peptide's N terminus. This enabled the TCR to achieve peptide selectivity via an indirect mechanism, whereby the TCR sensed the first residue of the peptide through HLA residue Trp-167, which acted as a tunable gateway. Amino acid substitutions at peptide position 1 predicted to alter the HLA Trp-167 side-chain conformation abrogated TCR binding, indicating that this indirect binding mechanism is essential for peptide recognition. These findings extend our understanding of the molecular rules that underpin antigen recognition by TCRs and have important implications for the development of TCR-based therapies.
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Affiliation(s)
| | | | | | | | | | | | | | | | - David K Cole
- Immunocore Ltd., Abingdon, United Kingdom .,Cardiff University School of Medicine, Cardiff, United Kingdom
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45
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Liang T, Tong W, Ma S, Chang P. Standard therapies: solutions for improving therapeutic effects of immune checkpoint inhibitors on colorectal cancer. Oncoimmunology 2020; 9:1773205. [PMID: 32934878 PMCID: PMC7466849 DOI: 10.1080/2162402x.2020.1773205] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Immunotherapy using immune checkpoint inhibitors has opened a new era for cancer management. In colorectal cancer, patients with a phenotype of deficient mismatch repair or high microsatellite instability benefit from immunotherapy. However, the response of rest cases to immunotherapy alone is still poor. Nevertheless, preclinical data have revealed that either ionizing irradiation or chemotherapy can improve the tumoral immune milieu, because these approaches can induce immunogenic cell death among cancer cells. In this regard, combination use of standard therapy plus immunotherapy should be feasible. In this review, we will introduce the specific roles of standard therapies, including radiotherapy, chemotherapy, antiangiogenic and anti-EGFR therapy, in improving therapeutic effect of immune checkpoint inhibitors on colorectal cancer.
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Affiliation(s)
- Tingting Liang
- Oncology Department, The First Hospital of Jilin University, Changchun, P.R. China
| | - Weihua Tong
- Department of Gastrointestinal and Colorectal Surgery, The First Hospital of Jilin University, Changchun, P.R. China
| | - Siyang Ma
- Department of Radiation Oncology & Therapy, Jilin Provincial Key Laboratory of Radiation Oncology & Therapy, The First Hospital of Jilin University, Changchun, P.R. China
| | - Pengyu Chang
- Department of Radiation Oncology & Therapy, Jilin Provincial Key Laboratory of Radiation Oncology & Therapy, The First Hospital of Jilin University, Changchun, P.R. China
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46
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Immunotherapy in Bladder Cancer: Current Methods and Future Perspectives. Cancers (Basel) 2020; 12:cancers12051181. [PMID: 32392774 PMCID: PMC7281703 DOI: 10.3390/cancers12051181] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 05/02/2020] [Accepted: 05/05/2020] [Indexed: 02/06/2023] Open
Abstract
Bladder cancer is one of the most significant genitourinary cancer, causing high morbidity and mortality in a great number of patients. Over the years, various treatment methods for this type of cancer have been developed. The most common is the highly efficient method using Bacillus Calmette-Guerin, giving a successful effect in a high percentage of patients. However, due to the genetic instability of bladder cancer, together with individual needs of patients, the search for different therapy methods is ongoing. Immune checkpoints are cell surface molecules influencing the immune response and decreasing the strength of the immune response. Among those checkpoints, the PD-1 (programmed cell death protein-1)/PD-L1 (programmed cell death protein ligand 1) inhibitors aim at blocking those molecules, which results in T cell activation, and in bladder cancer the use of Atezolizumab, Avelumab, Durvalumab, Nivolumab, and Pembrolizumab has been described. The inhibition of another pivotal immune checkpoint, CTLA-4 (cytotoxic T cell antigen), may result in the mobilization of the immune system against bladder cancer and, among anti-CTLA-4 antibodies, the use of Ipilimumab and Tremelimumab has been discussed. Moreover, several different approaches to successful bladder cancer treatment exists, such as the use of ganciclovir and mTOR (mammalian target of rapamycin) kinase inhibitors, IL-12 (interleukin-12) and COX-2 (cyclooxygenase-2). The use of gene therapies and the disruption of different signaling pathways are currently being investigated. Research suggests that the combination of several methods increases treatment efficiency and the positive outcome in individual.
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47
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Hopkins JR, Crean RM, Catici DAM, Sewell AK, Arcus VL, Van der Kamp MW, Cole DK, Pudney CR. Peptide cargo tunes a network of correlated motions in human leucocyte antigens. FEBS J 2020; 287:3777-3793. [PMID: 32134551 PMCID: PMC8651013 DOI: 10.1111/febs.15278] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 02/20/2020] [Accepted: 03/03/2020] [Indexed: 11/28/2022]
Abstract
Most biomolecular interactions are typically thought to increase the (local) rigidity of a complex, for example, in drug‐target binding. However, detailed analysis of specific biomolecular complexes can reveal a more subtle interplay between binding and rigidity. Here, we focussed on the human leucocyte antigen (HLA), which plays a crucial role in the adaptive immune system by presenting peptides for recognition by the αβ T‐cell receptor (TCR). The role that the peptide plays in tuning HLA flexibility during TCR recognition is potentially crucial in determining the functional outcome of an immune response, with obvious relevance to the growing list of immunotherapies that target the T‐cell compartment. We have applied high‐pressure/temperature perturbation experiments, combined with molecular dynamics simulations, to explore the drivers that affect molecular flexibility for a series of different peptide–HLA complexes. We find that different peptide sequences affect peptide–HLA flexibility in different ways, with the peptide cargo tuning a network of correlated motions throughout the pHLA complex, including in areas remote from the peptide‐binding interface, in a manner that could influence T‐cell antigen discrimination.
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Affiliation(s)
- Jade R Hopkins
- Division of Infection and Immunity, School of Medicine, Cardiff University, UK
| | - Rory M Crean
- Department of Biology and Biochemistry, University of Bath, UK.,Doctoral Training Centre in Sustainable Chemical Technologies, University of Bath, UK
| | | | - Andrew K Sewell
- Division of Infection and Immunity, School of Medicine, Cardiff University, UK
| | - Vickery L Arcus
- School of Science, Faculty of Science and Engineering, University of Waikato, Hamilton, New Zealand
| | | | - David K Cole
- Division of Infection and Immunity, School of Medicine, Cardiff University, UK
| | - Christopher R Pudney
- Department of Biology and Biochemistry, University of Bath, UK.,Centre for Therapeutic Innovation, University of Bath, UK
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Mohme M, Neidert MC. Tumor-Specific T Cell Activation in Malignant Brain Tumors. Front Immunol 2020; 11:205. [PMID: 32117316 PMCID: PMC7031483 DOI: 10.3389/fimmu.2020.00205] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 01/27/2020] [Indexed: 12/17/2022] Open
Abstract
Due to their delicate locations as well as aggressive and infiltrative behavior, malignant brain tumors remain a therapeutic challenge. Harnessing the efficacy and specificity of the T-cell response to counteract malignant brain tumor progression and recurrence, represents an attractive treatment option. With the tremendous advances in the current era of immunotherapy, ongoing studies aim to determine the best treatment strategies for mounting a tumor-specific immune response against malignant brain tumors. However, immunosuppression in the local tumor environment, molecular and cellular heterogeneity as well as a lack of suitable targets for tumor-specific vaccination impede the successful implementation of immunotherapeutic treatment strategies in neuro-oncology. In this review, we therefore discuss the role of T cell exhaustion, the genetic and antigenic landscape, potential pitfalls and ongoing efforts to overcome the individual challenges in order to elicit a tumor-specific T cell response.
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Affiliation(s)
- Malte Mohme
- Department of Neurosurgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Marian Christoph Neidert
- Department of Neurosurgery, Clinical Neuroscience Center, University Hospital and University of Zurich, Zurich, Switzerland.,Department of Pathology and Center for Cancer Research, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States.,Broad Institute of Harvard and MIT, Cambridge, MA, United States
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Christophersen A. Peptide-MHC class I and class II tetramers: From flow to mass cytometry. HLA 2020; 95:169-178. [PMID: 31891448 DOI: 10.1111/tan.13789] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 11/26/2019] [Accepted: 12/30/2019] [Indexed: 12/31/2022]
Abstract
To develop better vaccines and more targeted treatments for cancer and autoimmune disorders, the disease-specific T cells and their cognate antigens need to be better characterized. For more than two decades, peptide-major histocompatibility complex (pMHC) tetramers and flow cytometry have been the gold standard for detection of CD8+ and CD4+ T cells specific to antigens in the context of MHC class I and class II, respectively. Nonetheless, more recent studies combining such reagents with mass cytometry, that is, cytometry by time of flight (CyTOF), have offered far more comprehensive profiling of antigen-specific T-cell responses. In addition, mass cytometry has enabled ex vivo screening of CD8+ T-cell reactivities against hundreds of MHC class I restricted candidate epitopes. MHC class II molecules, on the other hand, have been challenging to combine with mass cytometry as they are more complex and bind with lower affinities to cognate T-cell receptors than MHC class I molecules. In this review, I discuss how techniques originally developed to improve the staining capacity of pMHC tetramers in flow cytometry led to the successful combination of such reagents with mass cytometry. Especially, I will highlight very recent advances facilitating the combination with pMHC class II tetramers. Together, these mass cytometry-based studies can help develop more targeted treatments for cancer and autoimmune disorders.
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Affiliation(s)
- Asbjørn Christophersen
- KG Jebsen Coeliac Disease Research Centre, University of Oslo, Oslo, Norway.,Institute of Clinical Medicine, University of Oslo, Norway.,Department of Immunology, University of Oslo, Oslo, Norway
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50
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Tripathi SK, Salunke DM. Exploring the different states of wild-type T-cell receptor and mutant conformational changes towards understanding the antigen recognition. J Biomol Struct Dyn 2020; 39:188-201. [PMID: 31870204 DOI: 10.1080/07391102.2019.1708795] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Recognition of proteolytic peptide fragments presented by major histocompatibility complex (MHC) on target cells by T-cell receptor (TCR) is among the most important interactions in the adaptive immune system. Several computational studies have been performed to investigate conformational and dynamical properties of TCRs for enhanced immunogenicity. Here, we present the large-scale molecular dynamics (MD) simulation studies of the two comprehensive systems consisting of the wild-type and mutant IG4 TCR in complex with the tumor epitope NY-ESO peptide (SLLMWITQC) and analyzed for mapping conformational changes of TCR in the states prior to antigen binding, upon antigen binding and after the antigen was released. All of the simulations were performed with different states of TCRs for each 1000 ns of simulation time, providing six simulations for time duration of 6000 ns (6µs). We show that rather than undergoing most critical conformational changes upon antigen binding, the high proportion of complementarity-determining region (CDR) loops change by comparatively small amount. The hypervariable CDRα3 and CDRβ3 loops showed significant structural changes. Interestingly, the TCR β chain loops showed the least changes, which is reliable with recent implications that β domain of TCR may propel antigen interaction. The mutant shows higher rigidity than wild-type even in released state; expose an induced fit mechanism occurring from the re-structuring of CDRα3 loop and can allow enhanced binding affinity of the peptide antigen. Additionally, we show that CDRα3 loop and peptide contacts are an adaptive feature of affinity enhanced mutant TCR.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Sunil Kumar Tripathi
- Structural Immunology Group, Regional Centre for Biotechnology, NCR Biotech Science Cluster, Faridabad, India
| | - Dinakar M Salunke
- Structural Immunology Group, Regional Centre for Biotechnology, NCR Biotech Science Cluster, Faridabad, India.,Structural Immunology Group, International Centre for Genetic Engineering and Biotechnology (ICGEB), New Delhi, India
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