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Jiang J, Natarajan K, Margulies DH. Chaperone-mediated MHC-I peptide exchange in antigen presentation. IUCRJ 2024; 11:287-298. [PMID: 38656309 PMCID: PMC11067752 DOI: 10.1107/s2052252524002768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Accepted: 03/26/2024] [Indexed: 04/26/2024]
Abstract
This work focuses on molecules that are encoded by the major histocompatibility complex (MHC) and that bind self-, foreign- or tumor-derived peptides and display these at the cell surface for recognition by receptors on T lymphocytes (T cell receptors, TCR) and natural killer (NK) cells. The past few decades have accumulated a vast knowledge base of the structures of MHC molecules and the complexes of MHC/TCR with specificity for many different peptides. In recent years, the structures of MHC-I molecules complexed with chaperones that assist in peptide loading have been revealed by X-ray crystallography and cryogenic electron microscopy. These structures have been further studied using mutagenesis, molecular dynamics and NMR approaches. This review summarizes the current structures and dynamic principles that govern peptide exchange as these relate to the process of antigen presentation.
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Affiliation(s)
- Jiansheng Jiang
- Molecular Biology Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, Bethesda, MD 20892, USA
| | - Kannan Natarajan
- Molecular Biology Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, Bethesda, MD 20892, USA
| | - David H. Margulies
- Molecular Biology Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, Bethesda, MD 20892, USA
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2
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Meyer M, Parpoulas C, Barthélémy T, Becker JP, Charoentong P, Lyu Y, Börsig S, Bulbuc N, Tessmer C, Weinacht L, Ibberson D, Schmidt P, Pipkorn R, Eichmüller SB, Steinberger P, Lindner K, Poschke I, Platten M, Fröhling S, Riemer AB, Hassel JC, Roberti MP, Jäger D, Zörnig I, Momburg F. MediMer: a versatile do-it-yourself peptide-receptive MHC class I multimer platform for tumor neoantigen-specific T cell detection. Front Immunol 2024; 14:1294565. [PMID: 38239352 PMCID: PMC10794645 DOI: 10.3389/fimmu.2023.1294565] [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: 09/14/2023] [Accepted: 11/28/2023] [Indexed: 01/22/2024] Open
Abstract
Peptide-loaded MHC class I (pMHC-I) multimers have revolutionized our capabilities to monitor disease-associated T cell responses with high sensitivity and specificity. To improve the discovery of T cell receptors (TCR) targeting neoantigens of individual tumor patients with recombinant MHC molecules, we developed a peptide-loadable MHC class I platform termed MediMer. MediMers are based on soluble disulfide-stabilized β2-microglobulin/heavy chain ectodomain single-chain dimers (dsSCD) that can be easily produced in large quantities in eukaryotic cells and tailored to individual patients' HLA allotypes with only little hands-on time. Upon transient expression in CHO-S cells together with ER-targeted BirA biotin ligase, biotinylated dsSCD are purified from the cell supernatant and are ready to use. We show that CHO-produced dsSCD are free of endogenous peptide ligands. Empty dsSCD from more than 30 different HLA-A,B,C allotypes, that were produced and validated so far, can be loaded with synthetic peptides matching the known binding criteria of the respective allotypes, and stored at low temperature without loss of binding activity. We demonstrate the usability of peptide-loaded dsSCD multimers for the detection of human antigen-specific T cells with comparable sensitivities as multimers generated with peptide-tethered β2m-HLA heavy chain single-chain trimers (SCT) and wild-type peptide-MHC-I complexes prior formed in small-scale refolding reactions. Using allotype-specific, fluorophore-labeled competitor peptides, we present a novel dsSCD-based peptide binding assay capable of interrogating large libraries of in silico predicted neoepitope peptides by flow cytometry in a high-throughput and rapid format. We discovered rare T cell populations with specificity for tumor neoepitopes and epitopes from shared tumor-associated antigens in peripheral blood of a melanoma patient including a so far unreported HLA-C*08:02-restricted NY-ESO-1-specific CD8+ T cell population. Two representative TCR of this T cell population, which could be of potential value for a broader spectrum of patients, were identified by dsSCD-guided single-cell sequencing and were validated by cognate pMHC-I multimer staining and functional responses to autologous peptide-pulsed antigen presenting cells. By deploying the technically accessible dsSCD MHC-I MediMer platform, we hope to significantly improve success rates for the discovery of personalized neoepitope-specific TCR in the future by being able to also cover rare HLA allotypes.
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Affiliation(s)
- Marten Meyer
- Antigen Presentation and T/NK Cell Activation Group, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Clinical Cooperation Unit Applied Tumor Immunity, DKFZ, Heidelberg, Germany
- Department of Medical Oncology, National Center for Tumor Diseases (NCT) Heidelberg, Heidelberg University Hospital, Heidelberg, Germany
| | - Christina Parpoulas
- Antigen Presentation and T/NK Cell Activation Group, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Titouan Barthélémy
- Antigen Presentation and T/NK Cell Activation Group, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Jonas P. Becker
- Division of Immunotherapy and Immunoprevention, DKFZ, Heidelberg, Germany
- German Center for Infection Research (DZIF) Partner Site Heidelberg, Heidelberg, Germany
| | - Pornpimol Charoentong
- Clinical Cooperation Unit Applied Tumor Immunity, DKFZ, Heidelberg, Germany
- Department of Medical Oncology, National Center for Tumor Diseases (NCT) Heidelberg, Heidelberg University Hospital, Heidelberg, Germany
- Center for Quantitative Analysis of Molecular and Cellular Biosystems (Bioquant), Heidelberg University, Heidelberg, Germany
| | - Yanhong Lyu
- Clinical Cooperation Unit Applied Tumor Immunity, DKFZ, Heidelberg, Germany
| | - Selina Börsig
- Antigen Presentation and T/NK Cell Activation Group, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Department of Medical Oncology, National Center for Tumor Diseases (NCT) Heidelberg, Heidelberg University Hospital, Heidelberg, Germany
| | - Nadja Bulbuc
- Antigen Presentation and T/NK Cell Activation Group, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Claudia Tessmer
- Antigen Presentation and T/NK Cell Activation Group, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Clinical Cooperation Unit Applied Tumor Immunity, DKFZ, Heidelberg, Germany
| | - Lisa Weinacht
- Antigen Presentation and T/NK Cell Activation Group, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - David Ibberson
- Deep Sequencing Core Facility, Heidelberg University, Heidelberg, Germany
| | - Patrick Schmidt
- Department of Medical Oncology, National Center for Tumor Diseases (NCT) Heidelberg, Heidelberg University Hospital, Heidelberg, Germany
- GMP and T Cell Therapy, DKFZ, Heidelberg, Germany
| | | | | | - Peter Steinberger
- Division of Immune Receptors and T Cell Activation, Center for Pathophysiology, Infectiology, Medical University of Vienna, Vienna, Austria
| | - Katharina Lindner
- Clinical Cooperation Unit Neuroimmunology and Brain Tumor Immunology, DKFZ, Heidelberg, Germany
- Immune Monitoring Unit, NCT Heidelberg and DKFZ, Heidelberg, Germany
| | - Isabel Poschke
- Clinical Cooperation Unit Neuroimmunology and Brain Tumor Immunology, DKFZ, Heidelberg, Germany
- Immune Monitoring Unit, NCT Heidelberg and DKFZ, Heidelberg, Germany
| | - Michael Platten
- Clinical Cooperation Unit Neuroimmunology and Brain Tumor Immunology, DKFZ, Heidelberg, Germany
- Immune Monitoring Unit, NCT Heidelberg and DKFZ, Heidelberg, Germany
- German Cancer Consortium (DKTK), DKFZ, Core Center, Heidelberg, Germany
- Department of Neurology, Medical Faculty Mannheim, Mannheim Center for Translational Neuroscience (MCTN), Heidelberg University, Mannheim, Germany
- DKFZ Hector Cancer Institute at the University Medical Center, Mannheim, Germany
- Helmholtz Institute for Translational Oncology, Mainz (HI-TRON Mainz), Mainz, Germany
| | - Stefan Fröhling
- German Cancer Consortium (DKTK), DKFZ, Core Center, Heidelberg, Germany
- Division of Translational Medical Oncology, NCT Heidelberg and DKFZ, Heidelberg, Germany
- Institute of Human Genetics, Heidelberg University, Heidelberg, Germany
| | - Angelika B. Riemer
- Division of Immunotherapy and Immunoprevention, DKFZ, Heidelberg, Germany
- German Center for Infection Research (DZIF) Partner Site Heidelberg, Heidelberg, Germany
| | - Jessica C. Hassel
- Section of DermatoOncology, Department of Dermatology and NCT, Heidelberg University Hospital, Heidelberg, Germany
| | - Maria Paula Roberti
- Clinical Cooperation Unit Applied Tumor Immunity, DKFZ, Heidelberg, Germany
- Department of Medical Oncology, National Center for Tumor Diseases (NCT) Heidelberg, Heidelberg University Hospital, Heidelberg, Germany
| | - Dirk Jäger
- Clinical Cooperation Unit Applied Tumor Immunity, DKFZ, Heidelberg, Germany
- Department of Medical Oncology, National Center for Tumor Diseases (NCT) Heidelberg, Heidelberg University Hospital, Heidelberg, Germany
| | - Inka Zörnig
- Clinical Cooperation Unit Applied Tumor Immunity, DKFZ, Heidelberg, Germany
- Department of Medical Oncology, National Center for Tumor Diseases (NCT) Heidelberg, Heidelberg University Hospital, Heidelberg, Germany
| | - Frank Momburg
- Antigen Presentation and T/NK Cell Activation Group, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Department of Medical Oncology, National Center for Tumor Diseases (NCT) Heidelberg, Heidelberg University Hospital, Heidelberg, Germany
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3
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Fattahi P, Salehi N, Azizi Z, Mohammadi J, Norouzy A, Moazzeni SM. Fluorescence labeling of anchor-modified Mart-1 peptide for increasing its affinity for HLA-A*0201: Hit two targets with one arrow. J Pept Sci 2023; 29:e3480. [PMID: 36662516 DOI: 10.1002/psc.3480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 01/13/2023] [Accepted: 01/16/2023] [Indexed: 01/21/2023]
Abstract
One of the most successful strategies in designing peptide-based cancer vaccines is modifying natural epitope peptides to increase their binding strength to human leukocyte antigens (HLAs). Anchor-modified Mart-1 peptide (ELAGIGILTV) is among the artificial epitope peptides with the highest binding affinity for HLA-A*0201. In this study, by fluorescence labeling of its either C- or N-terminus with Nε -(5-carboxyfluorescein)-l-lysine, we not only made it traceable but also drastically increased its binding strength to HLA-A*0201. HLA streptamer, for the first time, is introduced for measuring the binding constants (Ka ) of the labeled peptides. The affinity of the labeled peptides for the HLA-A*201 of the MCF-7 cells was extraordinarily high and co-incubating them with the highest possible amount of the unlabeled peptide, as a competitor, did not significantly prohibit them from binding to the HLA. The reproducibility of the obtained results was confirmed by using the T2 cell line. The HLA-deficient K562 cell line was used as the negative control. With in silico simulations, we found two hydrophobic pockets on both sides of HLA-A*0201 for anchoring the C- or N-terminal 5-carboxyfluorescein probe, which can explain the extraordinary affinity of the labeled peptides for the HLA-A*0201.
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Affiliation(s)
- Pooya Fattahi
- Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Najmeh Salehi
- Institute of Medical Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran
| | - Zahra Azizi
- Department of Molecular Medicine, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Javad Mohammadi
- Department of Biomedical Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran
| | - Amir Norouzy
- Bioprocess Engineering Department, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran
| | - Seyed Mohammad Moazzeni
- Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
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Structural mechanism of tapasin-mediated MHC-I peptide loading in antigen presentation. Nat Commun 2022; 13:5470. [PMID: 36115831 PMCID: PMC9482634 DOI: 10.1038/s41467-022-33153-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 08/26/2022] [Indexed: 11/08/2022] Open
Abstract
AbstractLoading of MHC-I molecules with peptide by the catalytic chaperone tapasin in the peptide loading complex plays a critical role in antigen presentation and immune recognition. Mechanistic insight has been hampered by the lack of detailed structural information concerning tapasin–MHC-I. We present here crystal structures of human tapasin complexed with the MHC-I molecule HLA-B*44:05, and with each of two anti-tapasin antibodies. The tapasin-stabilized peptide-receptive state of HLA-B*44:05 is characterized by distortion of the peptide binding groove and destabilization of the β2-microglobulin interaction, leading to release of peptide. Movements of the membrane proximal Ig-like domains of tapasin, HLA-B*44:05, and β2-microglobulin accompany the transition to a peptide-receptive state. Together this ensemble of crystal structures provides insights into a distinct mechanism of tapasin-mediated peptide exchange.
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5
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Su T, Cheng F, Qi J, Zhang Y, Zhou S, Mei L, Fu S, Zhang F, Lin S, Zhu G. Responsive Multivesicular Polymeric Nanovaccines that Codeliver STING Agonists and Neoantigens for Combination Tumor Immunotherapy. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2201895. [PMID: 35712773 PMCID: PMC9376841 DOI: 10.1002/advs.202201895] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 05/17/2022] [Indexed: 05/19/2023]
Abstract
Immune checkpoint blockade (ICB) has significantly advanced cancer immunotherapy, yet its patient response rates are generally low. Vaccines, including immunostimulant-adjuvanted peptide antigens, can improve ICB. The emerging neoantigens generated by cancer somatic mutations elicit cancer-specific immunity for personalized immunotherapy; the novel cyclic dinucleotide (CDN) adjuvants activate stimulator of interferon genes (STING) for antitumor type I interferon (IFN-I) responses. However, CDN/neoantigen vaccine development has been limited by the poor antigen/adjuvant codelivery. Here, pH-responsive CDN/neoantigen codelivering nanovaccines (NVs) for ICB combination tumor immunotherapy are reported. pH-responsive polymers are synthesized to be self-assembled into multivesicular nanoparticles (NPs) at physiological pH and disassembled at acidic conditions. NPs with high CDN/antigen coloading are selected as NVs for CDN/antigen codelivery to antigen presenting cells (APCs) in immunomodulatory lymph nodes (LNs). In the acidic endosome of APCs, pH-responsive NVs facilitate the vaccine release and escape into cytosol, where CDNs activate STING for IFN-I responses and antigens are presented by major histocompatibility complex (MHC) for T-cell priming. In mice, NVs elicit potent antigen-specific CD8+ T-cell responses with immune memory, and reduce multifaceted tumor immunosuppression. In syngeneic murine tumors, NVs show robust ICB combination therapeutic efficacy. Overall, these CDN/neoantigen-codelivering NVs hold the potential for ICB combination tumor immunotherapy.
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Affiliation(s)
- Ting Su
- Center for Translational MedicinePrecision Medicine InstituteThe First Affiliated HospitalSun Yat‐sen UniversityGuangzhou510080China
- Department of Pharmaceutics and Center for Pharmaceutical Engineering and Sciences; Institute for Structural Biology and Drug DiscoverySchool of Pharmacy; The Developmental Therapeutics ProgramMassey Cancer CenterVirginia Commonwealth UniversityRichmondVA23298USA
| | - Furong Cheng
- Department of Pharmaceutics and Center for Pharmaceutical Engineering and Sciences; Institute for Structural Biology and Drug DiscoverySchool of Pharmacy; The Developmental Therapeutics ProgramMassey Cancer CenterVirginia Commonwealth UniversityRichmondVA23298USA
| | - Jialong Qi
- Department of Pharmaceutics and Center for Pharmaceutical Engineering and Sciences; Institute for Structural Biology and Drug DiscoverySchool of Pharmacy; The Developmental Therapeutics ProgramMassey Cancer CenterVirginia Commonwealth UniversityRichmondVA23298USA
| | - Yu Zhang
- Department of Pharmaceutics and Center for Pharmaceutical Engineering and Sciences; Institute for Structural Biology and Drug DiscoverySchool of Pharmacy; The Developmental Therapeutics ProgramMassey Cancer CenterVirginia Commonwealth UniversityRichmondVA23298USA
| | - Shurong Zhou
- Department of Pharmaceutics and Center for Pharmaceutical Engineering and Sciences; Institute for Structural Biology and Drug DiscoverySchool of Pharmacy; The Developmental Therapeutics ProgramMassey Cancer CenterVirginia Commonwealth UniversityRichmondVA23298USA
| | - Lei Mei
- Department of Pharmaceutics and Center for Pharmaceutical Engineering and Sciences; Institute for Structural Biology and Drug DiscoverySchool of Pharmacy; The Developmental Therapeutics ProgramMassey Cancer CenterVirginia Commonwealth UniversityRichmondVA23298USA
| | - Shiwei Fu
- Department of ChemistryUniversity of MiamiCoral GablesFL33146USA
- The Dr. John T. Macdonald Foundation Biomedical Nanotechnology InstituteUniversity of MiamiMiamiFL33136USA
| | - Fuwu Zhang
- Department of ChemistryUniversity of MiamiCoral GablesFL33146USA
- The Dr. John T. Macdonald Foundation Biomedical Nanotechnology InstituteUniversity of MiamiMiamiFL33136USA
| | - Shuibin Lin
- Center for Translational MedicinePrecision Medicine InstituteThe First Affiliated HospitalSun Yat‐sen UniversityGuangzhou510080China
| | - Guizhi Zhu
- Department of Pharmaceutics and Center for Pharmaceutical Engineering and Sciences; Institute for Structural Biology and Drug DiscoverySchool of Pharmacy; The Developmental Therapeutics ProgramMassey Cancer CenterVirginia Commonwealth UniversityRichmondVA23298USA
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6
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Opening opportunities for K d determination and screening of MHC peptide complexes. Commun Biol 2022; 5:488. [PMID: 35606511 PMCID: PMC9127112 DOI: 10.1038/s42003-022-03366-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 04/13/2022] [Indexed: 01/15/2023] Open
Abstract
An essential element of adaptive immunity is selective binding of peptide antigens by major histocompatibility complex (MHC) class I proteins and their presentation to cytotoxic T lymphocytes. Using native mass spectrometry, we analyze the binding of peptides to an empty disulfide-stabilized HLA-A*02:01 molecule and, due to its unique stability, we determine binding affinities of complexes loaded with truncated or charge-reduced peptides. We find that the two anchor positions can be stabilized independently, and we further analyze the contribution of additional amino acid positions to the binding strength. As a complement to computational prediction tools, our method estimates binding strength of even low-affinity peptides to MHC class I complexes quickly and efficiently. It has huge potential to eliminate binding affinity biases and thus accelerate drug discovery in infectious diseases, autoimmunity, vaccine design, and cancer immunotherapy. The authors present a sensitive and rapid method to determine the binding strength of MHC class 1 peptide complexes using native mass spectrometry.
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Ren H, Li J, Liu G, Sun Y, Yang X, Jiang Z, Zhang J, Lovell JF, Zhang Y. Anticancer Vaccination with Immunogenic Micelles That Capture and Release Pristine CD8 + T-Cell Epitopes and Adjuvants. ACS APPLIED MATERIALS & INTERFACES 2022; 14:2510-2521. [PMID: 34986639 DOI: 10.1021/acsami.1c18117] [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] [Indexed: 06/14/2023]
Abstract
The development of nanocarriers capable of codelivering antigens and immune-activating adjuvants is an emerging area of research and is relevant for cancer vaccines that target induction of antigen-specific CD8+ T-cell responses. Here, we report a system for delivery of short peptide antigens to dendritic cells for strong cellular immune responses, based on block copolymers chemically modified with a hydrophobic and self-immolative linker. After modification, micelles effectively and reversibly capture antigens and adjuvants via a covalent bond within several minutes in an aqueous solution. After uptake in antigen presenting cells, the polymer disulfide bond is cleaved by intracellular glutathione, leading to release of pristine antigens, along with the upregulated expression of costimulatory molecules. The induced antigen-specific CD8+ T cells have strong tumor cell killing efficacy in the murine B16OVA and human papilloma virus-E6/E7 subcutaneous and lung metastasis tumor models. In addition, delivery to lymph nodes can be imaged to visualize vaccine trafficking. Taken together, multifunctional self-immolative micelles represent a versatile class of a vaccine delivery system for the generation of a cellular immune response that warrants further exploration as a component of cancer immunotherapy.
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Affiliation(s)
- He Ren
- School of Chemical Engineering and Technology, Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, P. R. China 300350
| | - Jiexin Li
- School of Chemical Engineering and Technology, Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, P. R. China 300350
| | - Gengqi Liu
- School of Chemical Engineering and Technology, Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, P. R. China 300350
| | - Yaping Sun
- Imaging Center, Hospital of Traditional Chinese Medicine, Beichen District, Tianjin, P. R. China 300400
| | - Xingyue Yang
- School of Chemical Engineering and Technology, Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, P. R. China 300350
| | - Zhen Jiang
- School of Chemical Engineering and Technology, Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, P. R. China 300350
| | - Jingyu Zhang
- School of Chemical Engineering and Technology, Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, P. R. China 300350
| | - Jonathan F Lovell
- Department of Biomedical Engineering, The State University of New York at Buffalo, Buffalo, New York 14260, United States
| | - Yumiao Zhang
- School of Chemical Engineering and Technology, Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, P. R. China 300350
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Kim SH, Park JH, Lee SJ, Lee HS, Jung JK, Lee YR, Cho HI, Kim JK, Kim K, Park CS, Lee CK. Efficient Anti-Tumor Immunotherapy Using Tumor Epitope-Coated Biodegradable Nanoparticles Combined With Polyinosinic-Polycytidylic Acid and an Anti-PD1 Monoclonal Antibody. Immune Netw 2022; 22:e42. [DOI: 10.4110/in.2022.22.e42] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 10/16/2022] [Indexed: 11/05/2022] Open
Affiliation(s)
- Sang-Hyun Kim
- Department of Pharmaceutics, College of Pharmacy, Chungbuk National University, Cheongju 28644, Korea
| | - Ji-Hyun Park
- Department of Pharmaceutics, College of Pharmacy, Chungbuk National University, Cheongju 28644, Korea
| | - Sun-Jae Lee
- Department of Pharmaceutics, College of Pharmacy, Chungbuk National University, Cheongju 28644, Korea
| | - Hee-Sung Lee
- Department of Pharmaceutics, College of Pharmacy, Chungbuk National University, Cheongju 28644, Korea
| | - Jae-Kyung Jung
- Department of Pharmaceutics, College of Pharmacy, Chungbuk National University, Cheongju 28644, Korea
| | - Young-Ran Lee
- Center for Convergence Bioceramic Materials, Korea Institute of Ceramic Engineering and Technology, Cheongju 28160, Korea
| | - Hyun-Il Cho
- Research and Development Division, ViGenCell Inc., Seoul 06591, Korea
| | - Jeong-Ki Kim
- Department of Pharmacy, Korea University College of Pharmacy, Sejong 30019, Korea
| | - Kyungjae Kim
- Department of Pharmacy, College of Pharmacy, Sahmyook University, Seoul 01795, Korea
| | - Chan-Su Park
- Department of Pharmaceutics, College of Pharmacy, Chungbuk National University, Cheongju 28644, Korea
| | - Chong-Kil Lee
- Department of Pharmaceutics, College of Pharmacy, Chungbuk National University, Cheongju 28644, Korea
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9
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Ruggiero FM, Springer S. Homotypic and heterotypic in cis associations of MHC class I molecules at the cell surface. CURRENT RESEARCH IN IMMUNOLOGY 2022; 3:85-99. [PMID: 35647522 PMCID: PMC9133507 DOI: 10.1016/j.crimmu.2022.05.001] [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: 01/27/2022] [Revised: 04/27/2022] [Accepted: 05/02/2022] [Indexed: 12/02/2022] Open
Abstract
Through the presentation of peptide antigens to cytotoxic T lymphocytes, major histocompatibility complex (MHC) class I molecules mediate the adaptive immune response against tumors and viruses. Additional non-immunological functions include the heterotypic association of class I molecules with cell surface receptors, regulating their activities by unknown mechanisms. Also, homotypic associations resulting in class I dimers and oligomers - of unknown function - have been related to pathological outcomes. In this review, we provide an overview of the current knowledge about the occurrence, biochemical nature, and dynamics of homotypic and heterotypic associations of class I molecules at the cell surface with special focus on the molecular species that take part in the complexes and on the evidence that supports novel biological roles for class I molecules. We show that both heterotypic and homotypic class I associations reported in the literature describe not one but several kinds of oligomers with distinctive stoichiometry and biochemical properties. Major histocompatibility complex class I molecules form homotypic and heterotypic associations at the cell surface. Associations show distinctive stoichiometry and biochemical properties. Associations might regulate immunological and non-immunological processes. Heterotypic association with cell surface receptors might regulate receptor's activity. Homotypic associations have been related to pathological outcomes.
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10
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Hadeler A, Saikia A, Zacharias M, Springer S. Rapid peptide exchange on MHC class I by small molecules elucidates dynamics of bound peptide. CURRENT RESEARCH IN IMMUNOLOGY 2022; 3:167-174. [PMID: 36042776 PMCID: PMC9420430 DOI: 10.1016/j.crimmu.2022.08.002] [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: 05/17/2022] [Revised: 07/05/2022] [Accepted: 08/01/2022] [Indexed: 11/26/2022] Open
Abstract
Complexes of peptides with recombinant major histocompatibility complex class I molecules (rpMHCs) are an important tool for T cell detection, isolation, and activation in cancer immunotherapy. The rapid preparation of rpMHCs is aided by peptide exchange, for which several technologies exist. Here, we show peptide exchange with small-molecule alcohols and demonstrate that they accelerate the dissociation of pre-bound peptides, creating a novel method for rapid production of rpMHCs and increasing the understanding of the conformational flexibility of the MHC-bound peptides. Small alcohols can catalyze peptide exchange on MHC-I. C-terminal peptide binding plays an important role in ethanol mediated exchange. MHC-I ethanol peptide exchange is allotype dependent.
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11
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Kubanov AA, Chikin VV, Karamova AE, Znamenskaya LF, Artamonova OG, Verbenko DA. Genetic markers for psoriatic arthritis among patients with psoriasis. Part II: HLA genes. VESTNIK DERMATOLOGII I VENEROLOGII 2021. [DOI: 10.25208/vdv1269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Abstract
Psoriatic arthritis often leads to the development of severe outcomes ankylosis, deformities of the affected joints with severe impairment of their functions and disability. Early identification of patients with psoriasis with an increased risk of developing psoriatic arthritis for the purpose of its timely diagnosis and early initiation of therapy can prevent the development of severe disease outcomes. It is believed that the genes of the HLA system make the greatest individual genetic contribution to the formation of a predisposition to hereditary diseases with polygenic inheritance. The literature review considers the polymorphisms of the genes of the HLA system, associated with the development of psoriatic arthritis, in patients with psoriasis. The HLA alleles that contribute to the development of psoriatic arthritis and its individual forms have been identified. HLA alleles have been identified, which have a protective effect against the development of psoriatic arthritis.
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12
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Vaurs J, Douchin G, Echasserieau K, Oger R, Jouand N, Fortun A, Hesnard L, Croyal M, Pecorari F, Gervois N, Bernardeau K. A novel and efficient approach to high-throughput production of HLA-E/peptide monomer for T-cell epitope screening. Sci Rep 2021; 11:17234. [PMID: 34446788 PMCID: PMC8390762 DOI: 10.1038/s41598-021-96560-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 08/10/2021] [Indexed: 12/05/2022] Open
Abstract
Over the past two decades, there has been a great interest in the study of HLA-E-restricted αβ T cells during bacterial and viral infections, including recently SARS-CoV-2 infection. Phenotyping of these specific HLA-E-restricted T cells requires new tools such as tetramers for rapid cell staining or sorting, as well as for the identification of new peptides capable to bind to the HLA-E pocket. To this aim, we have developed an optimal photosensitive peptide to generate stable HLA-E/pUV complexes allowing high-throughput production of new HLA-E/peptide complexes by peptide exchange. We characterized the UV exchange by ELISA and improved the peptide exchange readout using size exclusion chromatography. This novel approach for complex quantification is indeed very important to perform tetramerization of MHC/peptide complexes with the high quality required for detection of specific T cells. Our approach allows the rapid screening of peptides capable of binding to the non-classical human HLA-E allele, paving the way for the development of new therapeutic approaches based on the detection of HLA-E-restricted T cells.
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Affiliation(s)
- Juliette Vaurs
- P2R "Production de Protéines Recombinantes", Université de Nantes, CRCINA, SFR-Santé, INSERM, CNRS, CHU Nantes, Nantes, France
| | - Gaël Douchin
- P2R "Production de Protéines Recombinantes", Université de Nantes, CRCINA, SFR-Santé, INSERM, CNRS, CHU Nantes, Nantes, France
| | - Klara Echasserieau
- P2R "Production de Protéines Recombinantes", Université de Nantes, CRCINA, SFR-Santé, INSERM, CNRS, CHU Nantes, Nantes, France
- Université de Nantes, Inserm, CRCINA, 44000, Nantes, France
| | - Romain Oger
- Université de Nantes, Inserm, CRCINA, 44000, Nantes, France
- LabEx IGO «Immunotherapy, Graft, Oncology», Nantes, France
| | - Nicolas Jouand
- Université de Nantes, Inserm, CRCINA, 44000, Nantes, France
- Université de Nantes, CHU Nantes, Inserm, CNRS, SFR Santé, Inserm UMS 016, CNRS UMS 3556, 44000, Nantes, France
| | - Agnès Fortun
- P2R "Production de Protéines Recombinantes", Université de Nantes, CRCINA, SFR-Santé, INSERM, CNRS, CHU Nantes, Nantes, France
- Université de Nantes, CHU de Nantes, Cibles et médicaments des infections et du cancer, IICiMed, EA 1155, 44000, Nantes, France
| | - Leslie Hesnard
- Université de Nantes, Inserm, CRCINA, 44000, Nantes, France
| | - Mikaël Croyal
- Université de Nantes, CHU Nantes, Inserm, CNRS, SFR Santé, Inserm UMS 016, CNRS UMS 3556, 44000, Nantes, France
- Université de Nantes, CHU Nantes, CNRS, INSERM, l'institut du thorax, 44000, Nantes, France
- CRNH-Ouest Mass Spectrometry Core Facility, 44000, Nantes, France
| | - Frédéric Pecorari
- P2R "Production de Protéines Recombinantes", Université de Nantes, CRCINA, SFR-Santé, INSERM, CNRS, CHU Nantes, Nantes, France
- Université de Nantes, Inserm, CRCINA, 44000, Nantes, France
| | - Nadine Gervois
- Université de Nantes, Inserm, CRCINA, 44000, Nantes, France.
- LabEx IGO «Immunotherapy, Graft, Oncology», Nantes, France.
| | - Karine Bernardeau
- P2R "Production de Protéines Recombinantes", Université de Nantes, CRCINA, SFR-Santé, INSERM, CNRS, CHU Nantes, Nantes, France.
- Université de Nantes, Inserm, CRCINA, 44000, Nantes, France.
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13
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Moreno JC, Rojas BE, Vicente R, Gorka M, Matz T, Chodasiewicz M, Peralta‐Ariza JS, Zhang Y, Alseekh S, Childs D, Luzarowski M, Nikoloski Z, Zarivach R, Walther D, Hartman MD, Figueroa CM, Iglesias AA, Fernie AR, Skirycz A. Tyr-Asp inhibition of glyceraldehyde 3-phosphate dehydrogenase affects plant redox metabolism. EMBO J 2021; 40:e106800. [PMID: 34156108 PMCID: PMC8327957 DOI: 10.15252/embj.2020106800] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 05/13/2021] [Indexed: 12/28/2022] Open
Abstract
How organisms integrate metabolism with the external environment is a central question in biology. Here, we describe a novel regulatory small molecule, a proteogenic dipeptide Tyr-Asp, which improves plant tolerance to oxidative stress by directly interfering with glucose metabolism. Specifically, Tyr-Asp inhibits the activity of a key glycolytic enzyme, glyceraldehyde 3-phosphate dehydrogenase (GAPC), and redirects glucose toward pentose phosphate pathway (PPP) and NADPH production. In line with the metabolic data, Tyr-Asp supplementation improved the growth performance of both Arabidopsis and tobacco seedlings subjected to oxidative stress conditions. Moreover, inhibition of Arabidopsis phosphoenolpyruvate carboxykinase (PEPCK) activity by a group of branched-chain amino acid-containing dipeptides, but not by Tyr-Asp, points to a multisite regulation of glycolytic/gluconeogenic pathway by dipeptides. In summary, our results open the intriguing possibility that proteogenic dipeptides act as evolutionarily conserved small-molecule regulators at the nexus of stress, protein degradation, and metabolism.
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Affiliation(s)
- Juan C Moreno
- Max Planck Institute of Molecular Plant PhysiologyPotsdamGermany
- Center for Desert Agriculture, Biological and Environmental Science and Engineering Division (BESE)King Abdullah University of Science and Technology (KAUST)ThuwalSaudi Arabia
| | - Bruno E Rojas
- Instituto de Agrobiotecnología del LitoralUNLCONICET, FBCBSanta FeArgentina
| | - Rubén Vicente
- Max Planck Institute of Molecular Plant PhysiologyPotsdamGermany
| | - Michal Gorka
- Max Planck Institute of Molecular Plant PhysiologyPotsdamGermany
| | - Timon Matz
- Max Planck Institute of Molecular Plant PhysiologyPotsdamGermany
- BioinformaticsInstitute of Biochemistry and BiologyUniversity of PotsdamPotsdamGermany
| | | | | | - Youjun Zhang
- Max Planck Institute of Molecular Plant PhysiologyPotsdamGermany
- Center of Plant Systems Biology and Biotechnology (CPSBB)PlovdivBulgaria
| | - Saleh Alseekh
- Max Planck Institute of Molecular Plant PhysiologyPotsdamGermany
- Center of Plant Systems Biology and Biotechnology (CPSBB)PlovdivBulgaria
| | - Dorothee Childs
- European Molecular Biology Laboratory (EMBL) HeidelbergHeidelbergGermany
| | | | - Zoran Nikoloski
- Max Planck Institute of Molecular Plant PhysiologyPotsdamGermany
- BioinformaticsInstitute of Biochemistry and BiologyUniversity of PotsdamPotsdamGermany
- Center of Plant Systems Biology and Biotechnology (CPSBB)PlovdivBulgaria
| | - Raz Zarivach
- Faculty of Natural SciencesThe Ben Gurion University of the NegevBeer ShevaIsrael
| | - Dirk Walther
- Max Planck Institute of Molecular Plant PhysiologyPotsdamGermany
| | - Matías D Hartman
- Instituto de Agrobiotecnología del LitoralUNLCONICET, FBCBSanta FeArgentina
| | - Carlos M Figueroa
- Instituto de Agrobiotecnología del LitoralUNLCONICET, FBCBSanta FeArgentina
| | - Alberto A Iglesias
- Instituto de Agrobiotecnología del LitoralUNLCONICET, FBCBSanta FeArgentina
| | - Alisdair R Fernie
- Max Planck Institute of Molecular Plant PhysiologyPotsdamGermany
- Center of Plant Systems Biology and Biotechnology (CPSBB)PlovdivBulgaria
| | - Aleksandra Skirycz
- Max Planck Institute of Molecular Plant PhysiologyPotsdamGermany
- Boyce Thompson InstituteIthacaUSA
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14
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Saikia A, Springer S. Peptide-MHC I complex stability measured by nanoscale differential scanning fluorimetry reveals molecular mechanism of thermal denaturation. Mol Immunol 2021; 136:73-81. [PMID: 34091103 DOI: 10.1016/j.molimm.2021.04.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 04/08/2021] [Accepted: 04/29/2021] [Indexed: 12/22/2022]
Abstract
Recombinant major histocompatibility complex class I molecules are used in diagnostic and therapeutic approaches in cancer immunotherapy, with many studies exploring their binding to antigenic peptides. Current techniques for kinetic peptide binding studies are hampered by high sample consumption, low throughput, interference with protein stability, and/or high background signal. Here, we validate nanoscale differential scanning fluorimetry (nanoDSF), a method using the tryptophan fluorescence of class I molecules, for class I/peptide binding, and we use it to determine the molecular mechanism of the thermal denaturation of HLA-A*02:01.
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Affiliation(s)
- Ankur Saikia
- Department of Life Science and Chemistry, Jacobs University Bremen, Germany
| | - Sebastian Springer
- Department of Life Science and Chemistry, Jacobs University Bremen, Germany.
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15
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Darwish M, Wichner S, Li J, Chang JC, Tam C, Franke Y, Li H, Chan P, Blanchette C. High-throughput identification of conditional MHCI ligands and scaled-up production of conditional MHCI complexes. Protein Sci 2021; 30:1169-1183. [PMID: 33840137 PMCID: PMC8138534 DOI: 10.1002/pro.4082] [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: 02/12/2021] [Revised: 04/05/2021] [Accepted: 04/06/2021] [Indexed: 01/28/2023]
Abstract
Despite the need to monitor the impact of Cancer Immunotherapy (CI)/Immuno-Oncology (IO) therapeutics on neoantigen-specific T-cell responses, very few clinical programs incorporate this aspect of immune monitoring due to the challenges in high-throughput (HTP) generation of Major Histocompatibility Complex Class I (MHCI) tetramers across a wide range of HLA alleles. This limitation was recently addressed through the development of MHCI complexes with peptides containing a nonnatural UV cleavable amino acid (conditional MHCI ligands) that enabled HTP peptide exchange upon UV exposure. Despite this advancement, the number of alleles with known conditional MHCI ligands is limited. We developed a novel workflow to enable identification and validation of conditional MHCI ligands across a range of HLA alleles. First, known peptide binders were screened via an enzyme-linked immunosorbent assay (ELISA) assay. Conditional MHCI ligands were designed using the highest-performing peptides and evaluated in the same ELISA assay. The top performers were then selected for scale-up production. Next-generation analytical techniques (LC/MS, SEC-MALS, and 2D LC/MS) were used to characterize the complex after refolding with the conditional MHCI ligands. Finally, we used 2D LC/MS to evaluate peptide exchange with these scaled-up conditional MHCI complexes after UV exposure with validated peptide binders. Successful peptide exchange was observed for all conditional MHCI ligands upon UV exposure, validating our screening approach. This approach has the potential to be broadly applied and enable HTP generation of MHCI monomers and tetramers across a wider range of HLA alleles, which could be critical to enabling the use of MHCI tetramers to monitor neoantigen-specific T-cells in the clinic.
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Affiliation(s)
| | - Sara Wichner
- Protein ChemistryGenentech IncSan FranciscoCaliforniaUSA
| | - Jenny Li
- Biochemical and Cellular PharmacologyGenentech IncSan FranciscoCaliforniaUSA
| | | | - Christine Tam
- BioMolecular ResourcesGenentech IncSan FranciscoCaliforniaUSA
| | - Yvonne Franke
- BioMolecular ResourcesGenentech IncSan FranciscoCaliforniaUSA
| | - Hong Li
- Protein ChemistryGenentech IncSan FranciscoCaliforniaUSA
| | - Pamela Chan
- Biochemical and Cellular PharmacologyGenentech IncSan FranciscoCaliforniaUSA
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16
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Jantz-Naeem N, Springer S. Venus flytrap or pas de trois? The dynamics of MHC class I molecules. Curr Opin Immunol 2021; 70:82-89. [PMID: 33993034 DOI: 10.1016/j.coi.2021.04.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 04/05/2021] [Accepted: 04/08/2021] [Indexed: 11/25/2022]
Abstract
The peptide binding site of major histocompatibility complex (MHC) class I molecules is natively unfolded when devoid of peptides. Peptide binding stabilizes the structure and slows the dynamics, but peptide-specific and subtype-specific motions influence, and are influenced by, interaction with assembly chaperones, the T cell receptor, and other class I-binding proteins. The molecular mechanisms of cooperation between peptide, class I heavy chain, and beta-2 microglobulin are insufficiently known but are being elucidated by nuclear magnetic resonance and other modern methods. It appears that micropolymorphic clusters of charged amino acids, often hidden in the molecule interior, determine the dynamics and thus chaperone dependence, cellular fate, and disease association of class I.
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Affiliation(s)
- Nouria Jantz-Naeem
- Department of Life Sciences and Chemistry, Jacobs University, Bremen, Germany
| | - Sebastian Springer
- Department of Life Sciences and Chemistry, Jacobs University, Bremen, Germany.
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17
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Su Q, Song H, Huang P, Zhang C, Yang J, Kong D, Wang W. Supramolecular co-assembly of self-adjuvanting nanofibrious peptide hydrogel enhances cancer vaccination by activating MyD88-dependent NF-κB signaling pathway without inflammation. Bioact Mater 2021; 6:3924-3934. [PMID: 33997486 PMCID: PMC8080410 DOI: 10.1016/j.bioactmat.2021.03.041] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 03/10/2021] [Accepted: 03/25/2021] [Indexed: 12/14/2022] Open
Abstract
Peptide vaccine targeting tumor-specific antigens is a promising cancer treatment regimen. However, peptide vaccines are commonly low-immunogenic, leading to suboptimal antitumor T-cell responses. Current peptide vaccination approaches are challenged by the variability of peptide physicochemical characters and vaccine formulations, flexibility, and the broad feasibility. Here, the supramolecular co-assembly of antigen epitope-conjugated peptides (ECPs) targeting CD8 or CD4 T-cell receptors was used to engineer a nanofibrious hydrogel vaccine platform. This approach provided precise and tunable loading of peptide antigens in nanofibers, which notably increased the antigen uptake, cross-presentation, and activation of dendritic cells (DCs). Immunization in mice indicated that the co-assembled peptide hydrogel did not induce local inflammation responses and elicited significantly promoted T-cell immunity by activating the MyD88-dependent NF-κB signaling pathway in DCs. Vaccination of mice using co-assembled peptide vaccine stimulated both enhanced CD8 and CD4 T cells against EG.7-OVA tumors without additional immunoadjuvants or delivery systems, and resulted in a more remarkable cancer immunotherapy efficacy, compared with free peptide vaccine or aluminum-adjuvanted peptide formulation. Altogether, peptide co-assembly demonstrated by three independent pairs of ECPs is a facile, customizable, and chemically defined approach for co-delivering peptide antigens in self-adjuvanting hydrogel vaccines that could induce stronger anticancer T-cell responses. Supramolecular co-assembly is a facile approach for manufacturing peptide vaccine. Peptide vaccine activates DCs through the MyD88-dependent NF-κB signaling pathway. Vaccination of co-assembled peptide hydrogel augments antitumor T-cell responses. Co-assembled peptide vaccine shows therapeutic cancer immunotherapy efficacy.
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Affiliation(s)
- Qi Su
- Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin, 300072, China
| | - Huijuan Song
- Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, 300192, China
| | - Pingsheng Huang
- Tianjin Key Laboratory of Biomaterial Research, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, 300192, China
| | - Chuangnian Zhang
- Tianjin Key Laboratory of Biomaterial Research, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, 300192, China
| | - Jing Yang
- Tianjin Key Laboratory of Biomaterial Research, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, 300192, China
| | - Deling Kong
- State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Weiwei Wang
- Tianjin Key Laboratory of Biomaterial Research, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, 300192, China
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18
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D’Ippolito E, Wagner KI, Busch DH. Needle in a Haystack: The Naïve Repertoire as a Source of T Cell Receptors for Adoptive Therapy with Engineered T Cells. Int J Mol Sci 2020; 21:E8324. [PMID: 33171940 PMCID: PMC7664211 DOI: 10.3390/ijms21218324] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 10/27/2020] [Accepted: 11/02/2020] [Indexed: 12/11/2022] Open
Abstract
T cell engineering with antigen-specific T cell receptors (TCRs) has allowed the generation of increasingly specific, reliable, and versatile T cell products with near-physiological features. However, a broad applicability of TCR-based therapies in cancer is still limited by the restricted number of TCRs, often also of suboptimal potency, available for clinical use. In addition, targeting of tumor neoantigens with TCR-engineered T cell therapy moves the field towards a highly personalized treatment, as tumor neoantigens derive from somatic mutations and are extremely patient-specific. Therefore, relevant TCRs have to be de novo identified for each patient and within a narrow time window. The naïve repertoire of healthy donors would represent a reliable source due to its huge diverse TCR repertoire, which theoretically entails T cells for any antigen specificity, including tumor neoantigens. As a challenge, antigen-specific naïve T cells are of extremely low frequency and mostly of low functionality, making the identification of highly functional TCRs finding a "needle in a haystack." In this review, we present the technological advancements achieved in high-throughput mapping of patient-specific neoantigens and corresponding cognate TCRs and how these platforms can be used to interrogate the naïve repertoire for a fast and efficient identification of rare but therapeutically valuable TCRs for personalized adoptive T cell therapy.
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MESH Headings
- Antigens, Neoplasm/genetics
- CD4-Positive T-Lymphocytes/immunology
- CD8-Positive T-Lymphocytes/immunology
- Humans
- Immunotherapy, Adoptive/methods
- Immunotherapy, Adoptive/trends
- Neoplasms/genetics
- Precision Medicine/methods
- Receptors, Antigen, T-Cell/genetics
- Receptors, Antigen, T-Cell/metabolism
- Receptors, Antigen, T-Cell/physiology
- Receptors, Chimeric Antigen/genetics
- Receptors, Chimeric Antigen/immunology
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Affiliation(s)
- Elvira D’Ippolito
- Institute for Medical Microbiology, Immunology and Hygiene, Technische Universität München (TUM), 81675 Munich, Germany; (E.D.); (K.I.W.)
| | - Karolin I. Wagner
- Institute for Medical Microbiology, Immunology and Hygiene, Technische Universität München (TUM), 81675 Munich, Germany; (E.D.); (K.I.W.)
| | - Dirk H Busch
- Institute for Medical Microbiology, Immunology and Hygiene, Technische Universität München (TUM), 81675 Munich, Germany; (E.D.); (K.I.W.)
- German Center for Infection Research (DZIF), Partner Site Munich, 81675 Munich, Germany
- Focus Group ‘‘Clinical Cell Processing and Purification”, Institute for Advanced Study, Technische Universität München (TUM), 81675 Munich, Germany
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19
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Dragomir MP, Manyam GC, Ott LF, Berland L, Knutsen E, Ivan C, Lipovich L, Broom BM, Calin GA. FuncPEP: A Database of Functional Peptides Encoded by Non-Coding RNAs. Noncoding RNA 2020; 6:E41. [PMID: 32977531 PMCID: PMC7712257 DOI: 10.3390/ncrna6040041] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Revised: 09/15/2020] [Accepted: 09/18/2020] [Indexed: 02/06/2023] Open
Abstract
Non-coding RNAs (ncRNAs) are essential players in many cellular processes, from normal development to oncogenic transformation. Initially, ncRNAs were defined as transcripts that lacked an open reading frame (ORF). However, multiple lines of evidence suggest that certain ncRNAs encode small peptides of less than 100 amino acids. The sequences encoding these peptides are known as small open reading frames (smORFs), many initiating with the traditional AUG start codon but terminating with atypical stop codons, suggesting a different biogenesis. The ncRNA-encoded peptides (ncPEPs) are gradually becoming appreciated as a new class of functional molecules that contribute to diverse cellular processes, and are deregulated in different diseases contributing to pathogenesis. As multiple publications have identified unique ncPEPs, we appreciated the need for assembling a new web resource that could gather information about these functional ncPEPs. We developed FuncPEP, a new database of functional ncRNA encoded peptides, containing all experimentally validated and functionally characterized ncPEPs. Currently, FuncPEP includes a comprehensive annotation of 112 functional ncPEPs and specific details regarding the ncRNA transcripts that encode these peptides. We believe that FuncPEP will serve as a platform for further deciphering the biologic significance and medical use of ncPEPs.
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Affiliation(s)
- Mihnea P. Dragomir
- Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; (L.F.O.); (L.B.); (E.K.); (C.I.)
- Department of Surgery, Fundeni Clinical Hospital, Carol Davila University of Medicine and Pharmacy, 022328 Bucharest, Romania
| | - Ganiraju C. Manyam
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; (G.C.M.); (B.M.B.)
| | - Leonie Florence Ott
- Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; (L.F.O.); (L.B.); (E.K.); (C.I.)
- Institute of Tumor Biology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Léa Berland
- Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; (L.F.O.); (L.B.); (E.K.); (C.I.)
| | - Erik Knutsen
- Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; (L.F.O.); (L.B.); (E.K.); (C.I.)
- Department of Medical Biology, Faculty of Health Sciences, UiT—The Arctic University of Norway, N-9037 Tromsø, Norway
| | - Cristina Ivan
- Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; (L.F.O.); (L.B.); (E.K.); (C.I.)
- Center for RNA Interference and Non-Coding RNAs, The University of Texas MD Anderson Cancer Centre, Houston, TX 77054, USA
| | - Leonard Lipovich
- Center for Molecular Medicine and Genetics, Wayne State University, Detroit, MI 48201, USA;
| | - Bradley M. Broom
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; (G.C.M.); (B.M.B.)
| | - George A. Calin
- Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; (L.F.O.); (L.B.); (E.K.); (C.I.)
- Center for RNA Interference and Non-Coding RNAs, The University of Texas MD Anderson Cancer Centre, Houston, TX 77054, USA
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20
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Hsueh PC, Wu KA, Yang CY, Hsu CW, Wang CL, Hung CM, Chen YT, Yu JS, Wu CC. Metabolomic profiling of parapneumonic effusion reveals a regulatory role of dipeptides in interleukin-8 production in neutrophil-like cells. Anal Chim Acta 2020; 1128:238-250. [PMID: 32825908 DOI: 10.1016/j.aca.2020.06.022] [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: 04/20/2020] [Revised: 05/24/2020] [Accepted: 06/09/2020] [Indexed: 11/16/2022]
Abstract
Bacterial pneumonia is a lethal condition, and approximately 40% of bacterial pneumonia patients experience parapneumonic effusion (PPE). Based on the severity of inflammation, PPEs can be categorized as early-stage uncomplicated PPE (UPPE), advanced-stage complicated PPE (CPPE) and, most seriously, thoracic empyema. Appropriate antibiotic treatment at the early stage of PPE can prevent PPE progression and reduce mortality, indicating that understanding PPE generation and components can help researchers develop corresponding treatment strategies for PPE. To this end, metabolomes of 73 PPE (38 UPPE and 35 CPPE samples) and 30 malignant pleural effusion (MPE) samples were profiled with differential 12C2-/13C2-isotope dansylation labeling-based mass spectrometry. We found that PPE is characterized by elevated levels of dipeptides, especially for PPEs at advanced stages. Furthermore, with integrated proteomic and transcriptomic analyses of PPEs, the levels of dipeptides were strongly associated with the production of interleukin-8 (IL-8), an inflammation-associated cytokine. The production of IL-8 indeed increased upon the treatment of HL-60-derived neutrophilic cells with dipeptides, Gly-Val and Gly-Tyr. Our findings help to elucidate the metabolic perturbations present in PPE and indicate for the first time that dipeptides may be involved in the immune regulation observed during PPE progression.
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Affiliation(s)
- Pei-Chun Hsueh
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Kuo-An Wu
- Department of Internal Medicine, Taoyuan Armed Forces General Hospital, Taoyuan, Taiwan; School of Medicine, Fu-Jen Catholic University, New Taipei City, Taiwan
| | - Chia-Yu Yang
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan; Molecular Medicine Research Center, Chang Gung University, Taoyuan, Taiwan; Department of Otolaryngology-Head & Neck Surgery, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan; Department of Microbiology and Immunology, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Chia-Wei Hsu
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, Taiwan
| | - Chih-Liang Wang
- Division of Pulmonary Oncology and Interventional Bronchoscopy, Department of Thoracic Medicine, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan
| | - Chu-Mi Hung
- Department of Medical Biotechnology and Laboratory Science, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Yi-Ting Chen
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan; Molecular Medicine Research Center, Chang Gung University, Taoyuan, Taiwan; Department of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Jau-Song Yu
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan; Molecular Medicine Research Center, Chang Gung University, Taoyuan, Taiwan
| | - Chih-Ching Wu
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan; Molecular Medicine Research Center, Chang Gung University, Taoyuan, Taiwan; Department of Otolaryngology-Head & Neck Surgery, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan; Department of Medical Biotechnology and Laboratory Science, College of Medicine, Chang Gung University, Taoyuan, Taiwan; Research Center for Emerging Viral Infections, College of Medicine, Chang Gung University, Taoyuan, Taiwan.
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21
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Moritz A, Anjanappa R, Wagner C, Bunk S, Hofmann M, Pszolla G, Saikia A, Garcia-Alai M, Meijers R, Rammensee HG, Springer S, Maurer D. High-throughput peptide-MHC complex generation and kinetic screenings of TCRs with peptide-receptive HLA-A*02:01 molecules. Sci Immunol 2020; 4:4/37/eaav0860. [PMID: 31324691 DOI: 10.1126/sciimmunol.aav0860] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 06/21/2019] [Indexed: 12/26/2022]
Abstract
Major histocompatibility complex (MHC) class I molecules present short peptide ligands on the cell surface for interrogation by cytotoxic CD8+ T cells. MHC class I complexes presenting tumor-associated peptides such as neoantigens represent key targets of cancer immunotherapy approaches currently in development, making them important for efficacy and safety screenings. Without peptide ligand, MHC class I complexes are unstable and decay quickly, making the production of soluble monomers for analytical purposes labor intensive. We have developed a disulfide-stabilized HLA-A*02:01 molecule that is stable without peptide but can form peptide-MHC complexes (pMHCs) with ligands of choice in a one-step loading procedure. We illustrate the similarity between the engineered mutant and the wild-type molecule with respect to affinity of wild-type or affinity-matured T cell receptors (TCRs) and present a crystal structure corroborating the binding kinetics measurements. In addition, we demonstrate a high-throughput binding kinetics measurement platform to analyze the binding characteristics of bispecific TCR (bsTCR) molecules against diverse pMHC libraries produced with the disulfide-stabilized HLA-A*02:01 molecule. We show that bsTCR affinities for pMHCs are indicative of in vitro function and generate a bsTCR binding motif to identify potential off-target interactions in the human proteome. These findings showcase the potential of the platform and the engineered HLA-A*02:01 molecule in the emerging field of pMHC-targeting biologics.
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Affiliation(s)
- Andreas Moritz
- Department of Immunology, Institute for Cell Biology, University of Tübingen, Tübingen, Germany. .,Immatics Biotechnologies GmbH, Tübingen, Germany
| | | | | | | | | | | | - Ankur Saikia
- Department of Life Sciences and Chemistry, Jacobs University, Bremen, Germany
| | - Maria Garcia-Alai
- European Molecular Biology Laboratory (EMBL), Hamburg Outstation, Notkestrasse 85, D-22607 Hamburg, Germany
| | - Rob Meijers
- European Molecular Biology Laboratory (EMBL), Hamburg Outstation, Notkestrasse 85, D-22607 Hamburg, Germany
| | - Hans-Georg Rammensee
- Department of Immunology, Institute for Cell Biology, University of Tübingen, Tübingen, Germany
| | - Sebastian Springer
- Department of Life Sciences and Chemistry, Jacobs University, Bremen, Germany
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22
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Thirumalaikumar VP, Wagner M, Balazadeh S, Skirycz A. Autophagy is responsible for the accumulation of proteogenic dipeptides in response to heat stress in Arabidopsis thaliana. FEBS J 2020; 288:281-292. [PMID: 32301545 DOI: 10.1111/febs.15336] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 03/22/2020] [Accepted: 04/14/2020] [Indexed: 12/13/2022]
Abstract
Proteogenic dipeptides are intermediates of proteolysis as well as an emerging class of small-molecule regulators with diverse and often dipeptide-specific functions. Herein, prompted by differential accumulation of dipeptides in a high-density Arabidopsis thaliana time-course stress experiment, we decided to pursue an identity of the proteolytic pathway responsible for the buildup of dipeptides under heat conditions. By querying dipeptide accumulation versus available transcript data, autophagy emerged as a top hit. To examine whether autophagy indeed contributes to the accumulation of dipeptides measured in response to heat stress, we characterized the loss-of-function mutants of crucial autophagy proteins to test whether interfering with autophagy would affect dipeptide accumulation in response to the heat treatment. This was indeed the case. This work implicates the involvement of autophagy in the accumulation of proteogenic dipeptides in response to heat stress in Arabidopsis.
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Affiliation(s)
| | - Mateusz Wagner
- Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany.,University of Wroclaw, Poland
| | - Salma Balazadeh
- Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany.,University of Leiden, The Netherlands
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23
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Structures of peptide-free and partially loaded MHC class I molecules reveal mechanisms of peptide selection. Nat Commun 2020; 11:1314. [PMID: 32161266 PMCID: PMC7066147 DOI: 10.1038/s41467-020-14862-4] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 02/06/2020] [Indexed: 02/08/2023] Open
Abstract
Major Histocompatibility Complex (MHC) class I molecules selectively bind peptides for presentation to cytotoxic T cells. The peptide-free state of these molecules is not well understood. Here, we characterize a disulfide-stabilized version of the human class I molecule HLA-A*02:01 that is stable in the absence of peptide and can readily exchange cognate peptides. We present X-ray crystal structures of the peptide-free state of HLA-A*02:01, together with structures that have dipeptides bound in the A and F pockets. These structural snapshots reveal that the amino acid side chains lining the binding pockets switch in a coordinated fashion between a peptide-free unlocked state and a peptide-bound locked state. Molecular dynamics simulations suggest that the opening and closing of the F pocket affects peptide ligand conformations in adjacent binding pockets. We propose that peptide binding is co-determined by synergy between the binding pockets of the MHC molecule. Major Histocompatibility Complex (MHC) class I molecules present tightly binding peptides on the cell surface for recognition by cytotoxic T cells. Here, the authors present the crystal structures of a disulfide-stabilized human MHC class I molecule in the peptide-free state and bound with dipeptides, and find that peptide binding is accompanied by concerted conformational switches of the amino acid side chains in the binding pockets.
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24
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Ni Q, Zhang F, Liu Y, Wang Z, Yu G, Liang B, Niu G, Su T, Zhu G, Lu G, Zhang L, Chen X. A bi-adjuvant nanovaccine that potentiates immunogenicity of neoantigen for combination immunotherapy of colorectal cancer. SCIENCE ADVANCES 2020; 6:eaaw6071. [PMID: 32206706 PMCID: PMC7080439 DOI: 10.1126/sciadv.aaw6071] [Citation(s) in RCA: 140] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 12/19/2019] [Indexed: 05/09/2023]
Abstract
Neoantigen vaccines have been enthusiastically pursued for personalized cancer immunotherapy while vast majority of neoantigens have no or low immunogenicity. Here, a bi-adjuvant neoantigen nanovaccine (banNV) that codelivered a peptide neoantigen (Adpgk) with two adjuvants [Toll-like receptor (TLR) 7/8 agonist R848 and TLR9 agonist CpG] was developed for potent cancer immunotherapy. Specifically, banNVs were prepared by a nanotemplated synthesis of concatemer CpG, nanocondensation with cationic polypeptides, and then physical loading with hydrophobic R848 and Adpgk. The immunogenicity of the neoantigen was profoundly potentiated by efficient codelivery of neoantigen and dual synergistic adjuvants, which is accompanied by reduced acute systemic toxicity. BanNVs sensitized immune checkpoint programmed death receptor 1 (PD-1) on T cells, therefore, a combination of banNVs with aPD-1 conspicuously induced the therapy response and led to complete regression of 70% neoantigen-specific tumors without recurrence. We conclude that banNVs are promising to optimize personalized therapeutic neoantigen vaccines for cancer immunotherapy.
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Affiliation(s)
- Qianqian Ni
- Department of Medical Imaging, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210002, China
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, NIH, Bethesda, MD 20892, USA
| | - Fuwu Zhang
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, NIH, Bethesda, MD 20892, USA
| | - Yijing Liu
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, NIH, Bethesda, MD 20892, USA
| | - Zhantong Wang
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, NIH, Bethesda, MD 20892, USA
| | - Guocan Yu
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, NIH, Bethesda, MD 20892, USA
| | - Brian Liang
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, NIH, Bethesda, MD 20892, USA
| | - Gang Niu
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, NIH, Bethesda, MD 20892, USA
| | - Ting Su
- Department of Pharmaceutics, Center for Pharmaceutical Engineering and Sciences, Institute for Structural Biology, Drug Discovery and Development, School of Pharmacy; Massey Cancer Center; Virginia Commonwealth University, Richmond, VA, 23219, USA
| | - Guizhi Zhu
- Department of Pharmaceutics, Center for Pharmaceutical Engineering and Sciences, Institute for Structural Biology, Drug Discovery and Development, School of Pharmacy; Massey Cancer Center; Virginia Commonwealth University, Richmond, VA, 23219, USA
- Corresponding author. (X.C.); (L.Z.); (G.L.); (G.Z.)
| | - Guangming Lu
- Department of Medical Imaging, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210002, China
- Corresponding author. (X.C.); (L.Z.); (G.L.); (G.Z.)
| | - Longjiang Zhang
- Department of Medical Imaging, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210002, China
- Corresponding author. (X.C.); (L.Z.); (G.L.); (G.Z.)
| | - Xiaoyuan Chen
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, NIH, Bethesda, MD 20892, USA
- Corresponding author. (X.C.); (L.Z.); (G.L.); (G.Z.)
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25
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De S, Sabu G, Zacharias M. Molecular mechanism of Be2+-ion binding to HLA-DP2: tetrahedral coordination, conformational changes and multi-ion binding. Phys Chem Chem Phys 2020; 22:799-810. [DOI: 10.1039/c9cp05695e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Be small and positive: the smaller size and higher charge of the Be2+-ion results in strong binding between the M2 peptide and the β-chain of HLA-DP2, which induces conformational changes at the periphery suitable for TCR binding.
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Affiliation(s)
- Susmita De
- Department of Applied Chemistry
- Cochin University of Science and Technology
- Kochi 682 022
- India
- Inter University Centre for Nanomaterials and Devices (IUCND)
| | - Gopika Sabu
- Department of Applied Chemistry
- Cochin University of Science and Technology
- Kochi 682 022
- India
| | - Martin Zacharias
- Physics Department
- Technical University of Munich
- Garching 85747
- Germany
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26
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27
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Saini SK, Tamhane T, Anjanappa R, Saikia A, Ramskov S, Donia M, Svane IM, Jakobsen SN, Garcia-Alai M, Zacharias M, Meijers R, Springer S, Hadrup SR. Empty peptide-receptive MHC class I molecules for efficient detection of antigen-specific T cells. Sci Immunol 2019; 4:4/37/eaau9039. [DOI: 10.1126/sciimmunol.aau9039] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 06/20/2019] [Indexed: 12/17/2022]
Abstract
The peptide-dependent stability of MHC class I molecules poses a substantial challenge for their use in peptide-MHC multimer–based approaches to comprehensively analyze T cell immunity. To overcome this challenge, we demonstrate the use of functionally empty MHC class I molecules stabilized by a disulfide bond to link the α1and α2helices close to the F pocket. Peptide-loaded disulfide-stabilized HLA-A*02:01 shows complete structural overlap with wild-type HLA-A*02:01. Peptide-MHC multimers prepared using disulfide-stabilized HLA-A*02:01, HLA-A*24:02, and H-2Kbcan be used to identify antigen-specific T cells, and they provide a better staining index for antigen-specific T cell detection compared with multimers prepared with wild-type MHC class I molecules. Disulfide-stabilized MHC class I molecules can be loaded with peptide in the multimerized form without affecting their capacity to stain T cells. We demonstrate the value of empty-loadable tetramers that are converted to antigen-specific tetramers by a single-step peptide addition through their use to identify T cells specific for mutation-derived neoantigens and other cancer-associated antigens in human melanoma.
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28
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Jurewicz MM, Willis RA, Ramachandiran V, Altman JD, Stern LJ. MHC-I peptide binding activity assessed by exchange after cleavage of peptide covalently linked to β2-microglobulin. Anal Biochem 2019; 584:113328. [PMID: 31201791 DOI: 10.1016/j.ab.2019.05.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 05/14/2019] [Accepted: 05/31/2019] [Indexed: 10/26/2022]
Abstract
A common approach to measuring binding constants involves combining receptor and ligand and measuring the distribution of bound and free states after equilibration. For class I major histocompatibility (MHC-I) proteins, which bind short peptides for presentation to T cells, this approach is precluded by instability of peptide-free protein. Here we develop a method wherein a weakly-binding peptide covalently attached to the N-terminus of the MHC-I β2m subunit is released from the peptide binding site after proteolytic cleavage of the linker. The resultant protein is able to bind added peptide. A direct binding assay and method for estimation of peptide binding constant (Kd) are described, in which fluorescence polarization is used to follow peptide binding. A competition binding assay and method for estimation of inhibitor binding constant (Ki) using the same principle also are also described. The method uses a cubic equation to relate observed binding to probe concentration, probe Kd, inhibitor concentration, and inhibitor Ki under general reaction conditions without assumptions relating to relative binding affinities or concentrations. We also delineate advantages of this approach compared to the Cheng-Prusoff and Munson-Rodbard approaches for estimation of Ki using competition binding data.
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Affiliation(s)
- Mollie M Jurewicz
- Program in Immunology and Microbiology, University of Massachusetts Medical School, Worcester, MA, 01605, United States; Department of Pathology, University of Massachusetts Medical School, Worcester, MA, 01605, United States
| | - Richard A Willis
- Emory Vaccine Center, Yerkes National Primate Research Center, Atlanta, GA, 30329, United States
| | - Vasanthi Ramachandiran
- Emory Vaccine Center, Yerkes National Primate Research Center, Atlanta, GA, 30329, United States
| | - John D Altman
- Emory Vaccine Center, Yerkes National Primate Research Center, Atlanta, GA, 30329, United States; Department of Microbiology and Immunology, Emory Vaccine Center at Yerkes, Emory University School of Medicine, Atlanta, GA, 30329, United States
| | - Lawrence J Stern
- Program in Immunology and Microbiology, University of Massachusetts Medical School, Worcester, MA, 01605, United States; Department of Pathology, University of Massachusetts Medical School, Worcester, MA, 01605, United States; Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA, 01605, United States.
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29
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Successive crystal structure snapshots suggest the basis for MHC class I peptide loading and editing by tapasin. Proc Natl Acad Sci U S A 2019; 116:5055-5060. [PMID: 30808808 DOI: 10.1073/pnas.1807656116] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
MHC-I epitope presentation to CD8+ T cells is directly dependent on peptide loading and selection during antigen processing. However, the exact molecular bases underlying peptide selection and binding by MHC-I remain largely unknown. Within the peptide-loading complex, the peptide editor tapasin is key to the selection of MHC-I-bound peptides. Here, we have determined an ensemble of crystal structures of MHC-I in complex with the peptide exchange-associated dipeptide GL, as well as the tapasin-associated scoop loop, alone or in combination with candidate epitopes. These results combined with mutation analyses allow us to propose a molecular model underlying MHC-I peptide selection by tapasin. The N termini of bound peptides most probably bind first in the N-terminal and middle region of the MHC-I peptide binding cleft, upon which the peptide C termini are tested for their capacity to dislodge the tapasin scoop loop from the F pocket of the MHC-I cleft. Our results also indicate important differences in peptide selection between different MHC-I alleles.
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30
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Ochyl LJ, Moon JJ. Dendritic Cell Membrane Vesicles for Activation and Maintenance of Antigen-Specific T Cells. Adv Healthc Mater 2019; 8:e1801091. [PMID: 30565895 PMCID: PMC6386464 DOI: 10.1002/adhm.201801091] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Revised: 10/22/2018] [Indexed: 12/16/2022]
Abstract
Cell membranes have recently gained attention as a promising drug delivery system. Here, dendritic cell membrane vesicles (DC-MVs) are examined as a platform to promote T cell responses. Nanosized DC-MVs are derived from DCs pretreated with monophosphoryl lipid A (MPLA), a FDA-approved immunostimulatory adjuvant. These "mature" DC-MVs activate DCs in vitro and increase their expression of costimulatory markers. DC-MVs also promote cross-priming of antigen-specific T cells in vitro, increasing their survival and CD25 expression. In addition, these mature DC-MVs potently augment the expansion of adoptively transferred CD8+ T cells in vivo, generating twofold to fourfold higher frequency of antigen-specific T cells, compared with other control formulations, including "immature" DC-MVs obtained without the MPLA pretreatment. Taken together, these results suggest that DC-MVs are an effective delivery platform for T cell activation and may serve as a potential delivery system for improving adoptive T cell therapy.
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Affiliation(s)
- Lukasz J. Ochyl
- Department of Pharmaceutical Sciences, University of Michigan, Biointerfaces Institute, University of Michigan, 2800 Plymouth Drive, Ann Arbor, MI 48109, USA
| | - James J. Moon
- Department of Biomedical Engineering, University of Michigan, 2800 Plymouth Drive, Ann Arbor, MI 48109, USA; Department of Pharmaceutical Sciences, University of Michigan, Biointerfaces Institute, University of Michigan, 2800 Plymouth Drive, Ann Arbor, MI 48109, USA,
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31
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Abstract
Major histocompatibility class I (MHC-I) molecules bind peptides derived from cellular synthesis and display them at the cell surface for recognition by receptors on T lymphocytes (TCR) or natural killer (NK) cells. Such recognition provides a crucial step in autoimmunity, identification of bacterial and viral pathogens, and anti-tumor responses. Understanding the mechanism by which such antigenic peptides in the ER are loaded and exchanged for higher affinity peptides onto MHC molecules has recently been clarified by cryo-EM and X-ray studies of the multimolecular peptide loading complex (PLC) and a unimolecular tapasin-like chaperone designated TAPBPR. Insights from these structural studies and complementary solution NMR experiments provide a basis for understanding mechanisms related to immune antigen presentation.
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32
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Dirscherl C, Hein Z, Ramnarayan VR, Jacob-Dolan C, Springer S. A two-hybrid antibody micropattern assay reveals specific in cis interactions of MHC I heavy chains at the cell surface. eLife 2018; 7:e34150. [PMID: 30180933 PMCID: PMC6125123 DOI: 10.7554/elife.34150] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Accepted: 07/24/2018] [Indexed: 12/22/2022] Open
Abstract
We demonstrate a two-hybrid assay based on antibody micropatterns to study protein-protein interactions at the cell surface of major histocompatibility complex class I (MHC I) proteins. Anti-tag and conformation-specific antibodies are used for individual capture of specific forms of MHC I proteins that allow for location- and conformation-specific analysis by fluorescence microscopy. The assay is used to study the in cis interactions of MHC I proteins at the cell surface under controlled conditions and to define the involved protein conformations. Our results show that homotypic in cis interactions occur exclusively between MHC I free heavy chains, and we identify the dissociation of the light chain from the MHC I protein complex as a condition for MHC I in cis interactions. The functional role of these MHC I protein-protein interactions at the cell surface needs further investigation. We propose future technical developments of our two-hybrid assay for further analysis of MHC I protein-protein interactions.
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Affiliation(s)
- Cindy Dirscherl
- Department of Life Sciences and ChemistryJacobs UniversityBremenGermany
| | - Zeynep Hein
- Department of Life Sciences and ChemistryJacobs UniversityBremenGermany
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33
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Walters LC, Harlos K, Brackenridge S, Rozbesky D, Barrett JR, Jain V, Walter TS, O'Callaghan CA, Borrow P, Toebes M, Hansen SG, Sacha JB, Abdulhaqq S, Greene JM, Früh K, Marshall E, Picker LJ, Jones EY, McMichael AJ, Gillespie GM. Pathogen-derived HLA-E bound epitopes reveal broad primary anchor pocket tolerability and conformationally malleable peptide binding. Nat Commun 2018; 9:3137. [PMID: 30087334 PMCID: PMC6081459 DOI: 10.1038/s41467-018-05459-z] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 07/04/2018] [Indexed: 12/31/2022] Open
Abstract
Through major histocompatibility complex class Ia leader sequence-derived (VL9) peptide binding and CD94/NKG2 receptor engagement, human leucocyte antigen E (HLA-E) reports cellular health to NK cells. Previous studies demonstrated a strong bias for VL9 binding by HLA-E, a preference subsequently supported by structural analyses. However, Mycobacteria tuberculosis (Mtb) infection and Rhesus cytomegalovirus-vectored SIV vaccinations revealed contexts where HLA-E and the rhesus homologue, Mamu-E, presented diverse pathogen-derived peptides to CD8+ T cells, respectively. Here we present crystal structures of HLA-E in complex with HIV and Mtb-derived peptides. We show that despite the presence of preferred primary anchor residues, HLA-E-bound peptides can adopt alternative conformations within the peptide binding groove. Furthermore, combined structural and mutagenesis analyses illustrate a greater tolerance for hydrophobic and polar residues in the primary pockets than previously appreciated. Finally, biochemical studies reveal HLA-E peptide binding and exchange characteristics with potential relevance to its alternative antigen presenting function in vivo.
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Affiliation(s)
- Lucy C Walters
- Nuffield Department of Medicine Research Building, Roosevelt Drive, Nuffield Department of Medicine, University of Oxford, Oxford, OX3 7FZ, UK
| | - Karl Harlos
- Division of Structural Biology, Wellcome Centre for Human Genetics, Roosevelt Drive, University of Oxford, Oxford, OX3 7BN, UK
| | - Simon Brackenridge
- Nuffield Department of Medicine Research Building, Roosevelt Drive, Nuffield Department of Medicine, University of Oxford, Oxford, OX3 7FZ, UK
| | - Daniel Rozbesky
- Division of Structural Biology, Wellcome Centre for Human Genetics, Roosevelt Drive, University of Oxford, Oxford, OX3 7BN, UK
| | - Jordan R Barrett
- Nuffield Department of Medicine Research Building, Roosevelt Drive, Nuffield Department of Medicine, University of Oxford, Oxford, OX3 7FZ, UK
| | - Vitul Jain
- Division of Structural Biology, Wellcome Centre for Human Genetics, Roosevelt Drive, University of Oxford, Oxford, OX3 7BN, UK
| | - Thomas S Walter
- Division of Structural Biology, Wellcome Centre for Human Genetics, Roosevelt Drive, University of Oxford, Oxford, OX3 7BN, UK
| | - Chris A O'Callaghan
- Henry Wellcome Building for Molecular Physiology, University of Oxford, Oxford, OX3 7BN, UK
| | - Persephone Borrow
- Nuffield Department of Medicine Research Building, Roosevelt Drive, Nuffield Department of Medicine, University of Oxford, Oxford, OX3 7FZ, UK
| | - Mireille Toebes
- Department Molecular Oncology and Immunology, B6 Plesmanlaan 121, Amsterdam, 1066CX, The Netherlands
| | - Scott G Hansen
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, 97006, USA
| | - Jonah B Sacha
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, 97006, USA
| | - Shaheed Abdulhaqq
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, 97006, USA
| | - Justin M Greene
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, 97006, USA
| | - Klaus Früh
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, 97006, USA
| | - Emily Marshall
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, 97006, USA
| | - Louis J Picker
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, 97006, USA
| | - E Yvonne Jones
- Division of Structural Biology, Wellcome Centre for Human Genetics, Roosevelt Drive, University of Oxford, Oxford, OX3 7BN, UK
| | - Andrew J McMichael
- Nuffield Department of Medicine Research Building, Roosevelt Drive, Nuffield Department of Medicine, University of Oxford, Oxford, OX3 7FZ, UK.
| | - Geraldine M Gillespie
- Nuffield Department of Medicine Research Building, Roosevelt Drive, Nuffield Department of Medicine, University of Oxford, Oxford, OX3 7FZ, UK.
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34
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Zhu G, Lynn GM, Jacobson O, Chen K, Liu Y, Zhang H, Ma Y, Zhang F, Tian R, Ni Q, Cheng S, Wang Z, Lu N, Yung BC, Wang Z, Lang L, Fu X, Jin A, Weiss ID, Vishwasrao H, Niu G, Shroff H, Klinman DM, Seder RA, Chen X. Albumin/vaccine nanocomplexes that assemble in vivo for combination cancer immunotherapy. Nat Commun 2017; 8:1954. [PMID: 29203865 PMCID: PMC5715147 DOI: 10.1038/s41467-017-02191-y] [Citation(s) in RCA: 214] [Impact Index Per Article: 30.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 11/13/2017] [Indexed: 01/09/2023] Open
Abstract
Subunit vaccines have been investigated in over 1000 clinical trials of cancer immunotherapy, but have shown limited efficacy. Nanovaccines may improve efficacy but have rarely been clinically translated. By conjugating molecular vaccines with Evans blue (EB) into albumin-binding vaccines (AlbiVax), here we develop clinically promising albumin/AlbiVax nanocomplexes that self-assemble in vivo from AlbiVax and endogenous albumin for efficient vaccine delivery and potent cancer immunotherapy. PET pharmacoimaging, super-resolution microscopies, and flow cytometry reveal almost 100-fold more efficient co-delivery of CpG and antigens (Ags) to lymph nodes (LNs) by albumin/AlbiVax than benchmark incomplete Freund's adjuvant (IFA). Albumin/AlbiVax elicits ~10 times more frequent peripheral antigen-specific CD8+ cytotoxic T lymphocytes with immune memory than IFA-emulsifying vaccines. Albumin/AlbiVax specifically inhibits progression of established primary or metastatic EG7.OVA, B16F10, and MC38 tumors; combination with anti-PD-1 and/or Abraxane further potentiates immunotherapy and eradicates most MC38 tumors. Albumin/AlbiVax nanocomplexes are thus a robust platform for combination cancer immunotherapy.
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Affiliation(s)
- Guizhi Zhu
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Geoffrey M Lynn
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases (NIAID), NIH, Bethesda, MD, 20892, USA
| | - Orit Jacobson
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Kai Chen
- Molecular Imaging Center, Department of Radiology, Keck School of Medicine, University of Southern California, Los Angeles, CA, 90033, USA
| | - Yi Liu
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA.,School of Engineering, China Pharmaceutical University, Nanjing, 210009, China
| | - Huimin Zhang
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Ying Ma
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Fuwu Zhang
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Rui Tian
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Qianqian Ni
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Siyuan Cheng
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Zhantong Wang
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA.,State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, Center for Molecular Imaging and Translational Medicine, School of Public Health, Xiamen University, Xiamen, 361102, China
| | - Nan Lu
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Bryant C Yung
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Zhe Wang
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Lixin Lang
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Xiao Fu
- Laboratory of Cellular Imaging and Macromolecular Biophysics, NIBIB, NIH, Bethesda, MD, 20892, USA
| | - Albert Jin
- Laboratory of Cellular Imaging and Macromolecular Biophysics, NIBIB, NIH, Bethesda, MD, 20892, USA
| | - Ido D Weiss
- Laboratory of Molecular Immunology, NIAID, NIH, Bethesda, MD, 20892, USA
| | - Harshad Vishwasrao
- Advanced Imaging and Microscopy Resource, National Institutes of Health, Bethesda, 20892, MD, USA
| | - Gang Niu
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Hari Shroff
- Advanced Imaging and Microscopy Resource, National Institutes of Health, Bethesda, 20892, MD, USA.,Section on High Resolution Optical Imaging, NIBIB, NIH, Bethesda, MD, 20892, USA
| | - Dennis M Klinman
- Cancer and Inflammation Program, National Cancer Institute, Frederick, MD, 21702, USA
| | - Robert A Seder
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases (NIAID), NIH, Bethesda, MD, 20892, USA
| | - Xiaoyuan Chen
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA.
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35
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Jiang J, Natarajan K, Boyd LF, Morozov GI, Mage MG, Margulies DH. Crystal structure of a TAPBPR-MHC I complex reveals the mechanism of peptide editing in antigen presentation. Science 2017; 358:1064-1068. [PMID: 29025991 PMCID: PMC6320693 DOI: 10.1126/science.aao5154] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 10/04/2017] [Indexed: 12/15/2022]
Abstract
Central to CD8+ T cell-mediated immunity is the recognition of peptide-major histocompatibility complex class I (p-MHC I) proteins displayed by antigen-presenting cells. Chaperone-mediated loading of high-affinity peptides onto MHC I is a key step in the MHC I antigen presentation pathway. However, the structure of MHC I with a chaperone that facilitates peptide loading has not been determined. We report the crystal structure of MHC I in complex with the peptide editor TAPBPR (TAP-binding protein-related), a tapasin homolog. TAPBPR remodels the peptide-binding groove of MHC I, resulting in the release of low-affinity peptide. Changes include groove relaxation, modifications of key binding pockets, and domain adjustments. This structure captures a peptide-receptive state of MHC I and provides insights into the mechanism of peptide editing by TAPBPR and, by analogy, tapasin.
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Affiliation(s)
- Jiansheng Jiang
- Molecular Biology Section, Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Kannan Natarajan
- Molecular Biology Section, Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Lisa F Boyd
- Molecular Biology Section, Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Giora I Morozov
- Molecular Biology Section, Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
- Hebrew University of Jerusalem, Robert H. Smith Faculty of Agriculture, Food and Environment, Rehovot 76100, Israel
| | - Michael G Mage
- Molecular Biology Section, Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - David H Margulies
- Molecular Biology Section, Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA.
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36
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Zhu G, Mei L, Vishwasrao HD, Jacobson O, Wang Z, Liu Y, Yung BC, Fu X, Jin A, Niu G, Wang Q, Zhang F, Shroff H, Chen X. Intertwining DNA-RNA nanocapsules loaded with tumor neoantigens as synergistic nanovaccines for cancer immunotherapy. Nat Commun 2017; 8:1482. [PMID: 29133898 PMCID: PMC5684198 DOI: 10.1038/s41467-017-01386-7] [Citation(s) in RCA: 173] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 09/14/2017] [Indexed: 01/05/2023] Open
Abstract
Nanomedicines that co-deliver DNA, RNA, and peptide therapeutics are highly desirable yet remain underdeveloped for cancer theranostics. Herein, we report self-assembled intertwining DNA-RNA nanocapsules (iDR-NCs) that efficiently delivered synergistic DNA CpG and short hairpin RNA (shRNA) adjuvants, as well as tumor-specific peptide neoantigens into antigen presenting cells (APCs) in lymph nodes for cancer immunotherapy. These nanovaccines were prepared by (1) producing tandem CpG and shRNA via concurrent rolling circle replication and rolling circle transcription, (2) self-assembling CpG and shRNA into DNA-RNA microflowers, (3) shrinking microflowers into iDR-NCs using PEG-grafted cationic polypeptides, and (4) physically loading neoantigen into iDR-NCs. CpG and shRNA in iDR-NCs synergistically activate APCs for sustained antigen presentation. Remarkably, iDR-NC/neoantigen nanovaccines elicit 8-fold more frequent neoantigen-specific peripheral CD8+ T cells than CpG, induce T cell memory, and significantly inhibit the progression of neoantigen-specific colorectal tumors. Collectively, iDR-NCs represent potential DNA/RNA/peptide triple-co-delivery nanocarriers and synergistic tumor immunotherapeutic nanovaccines. Nucleic acid nanomedicines are promising for cancer drug delivery. Here, the authors show using a mouse model the tumor immunotherapeutic efficacy of nanovaccines based on intertwining DNA-RNA nanocapsules loaded with DNA CpG, Stat3-silencing short hairpin RNA and tumor-specific peptide neoantigens.
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Affiliation(s)
- Guizhi Zhu
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Lei Mei
- Department of Nutrition and Food Science, College of Agriculture and Natural Resources, University of Maryland, College Park, MD, 20742, USA
| | | | - Orit Jacobson
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Zhantong Wang
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Yijing Liu
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Bryant C Yung
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Xiao Fu
- Laboratory of Cellular Imaging and Macromolecular Biophysics, NIBIB, NIH, Bethesda, MD, 20892, USA
| | - Albert Jin
- Laboratory of Cellular Imaging and Macromolecular Biophysics, NIBIB, NIH, Bethesda, MD, 20892, USA
| | - Gang Niu
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Qin Wang
- Department of Nutrition and Food Science, College of Agriculture and Natural Resources, University of Maryland, College Park, MD, 20742, USA
| | - Fuwu Zhang
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA.
| | - Hari Shroff
- Advanced Imaging and Microscopy Resource, NIH, Bethesda, MD, 20892, USA.,Section on High Resolution Optical Imaging, NIBIB, NIH, Bethesda, MD, 20892, USA
| | - Xiaoyuan Chen
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA.
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37
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Chen Z, Zhang N, Qi J, Chen R, Dijkstra JM, Li X, Wang Z, Wang J, Wu Y, Xia C. The Structure of the MHC Class I Molecule of Bony Fishes Provides Insights into the Conserved Nature of the Antigen-Presenting System. THE JOURNAL OF IMMUNOLOGY 2017; 199:3668-3678. [PMID: 29055007 DOI: 10.4049/jimmunol.1600229] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 08/15/2017] [Indexed: 01/02/2023]
Abstract
MHC molecules evolved with the descent of jawed fishes some 350-400 million years ago. However, very little is known about the structural features of primitive MHC molecules. To gain insight into these features, we focused on the MHC class I Ctid-UAA of the evolutionarily distant grass carp (Ctenopharyngodon idella). The Ctid-UAA H chain and β2-microglobulin (Ctid-β2m) were refolded in vitro in the presence of peptides from viruses that infect carp. The resulting peptide-Ctid-UAA (p/Ctid-UAA) structures revealed the classical MHC class I topology with structural variations. In comparison with known mammalian and chicken peptide-MHC class I (p/MHC I) complexes, p/Ctid-UAA structure revealed several distinct features. Notably, 1) although the peptide ligand conventionally occupied all six pockets (A-F) of the Ag-binding site, the binding mode of the P3 side chain to pocket D was not observed in other p/MHC I structures; 2) the AB loop between β strands of the α1 domain of p/Ctid-UAA complex comes into contact with Ctid-β2m, an interaction observed only in chicken p/BF2*2101-β2m complex; and 3) the CD loop of the α3 domain, which in mammals forms a contact with CD8, has a unique position in p/Ctid-UAA that does not superimpose with the structures of any known p/MHC I complexes, suggesting that the p/Ctid-UAA to Ctid-CD8 binding mode may be distinct. This demonstration of the structure of a bony fish MHC class I molecule provides a foundation for understanding the evolution of primitive class I molecules, how they present peptide Ags, and how they might control T cell responses.
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Affiliation(s)
- Zhaosan Chen
- Department of Microbiology and Immunology, College of Veterinary Medicine, China Agricultural University, Haidian District, Beijing 100193, China
| | - Nianzhi Zhang
- Department of Microbiology and Immunology, College of Veterinary Medicine, China Agricultural University, Haidian District, Beijing 100193, China
| | - Jianxun Qi
- Chinese Academy of Sciences Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Chaoyang District, Beijing 100101, China
| | - Rong Chen
- Department of Microbiology and Immunology, College of Veterinary Medicine, China Agricultural University, Haidian District, Beijing 100193, China
| | - Johannes M Dijkstra
- Institute for Comprehensive Medical Science, Fujita Health University, Toyoake 470-1192, Japan; and
| | - Xiaoying Li
- Department of Microbiology and Immunology, College of Veterinary Medicine, China Agricultural University, Haidian District, Beijing 100193, China
| | - Zhenbao Wang
- Department of Microbiology and Immunology, College of Veterinary Medicine, China Agricultural University, Haidian District, Beijing 100193, China
| | - Junya Wang
- Department of Microbiology and Immunology, College of Veterinary Medicine, China Agricultural University, Haidian District, Beijing 100193, China
| | - Yanan Wu
- Department of Microbiology and Immunology, College of Veterinary Medicine, China Agricultural University, Haidian District, Beijing 100193, China
| | - Chun Xia
- Department of Microbiology and Immunology, College of Veterinary Medicine, China Agricultural University, Haidian District, Beijing 100193, China; .,Key Laboratory of Animal Epidemiology and Zoonosis, Ministry of Agriculture, Haidian District, Beijing 100094, China
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38
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Ayres CM, Corcelli SA, Baker BM. Peptide and Peptide-Dependent Motions in MHC Proteins: Immunological Implications and Biophysical Underpinnings. Front Immunol 2017; 8:935. [PMID: 28824655 PMCID: PMC5545744 DOI: 10.3389/fimmu.2017.00935] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Accepted: 07/21/2017] [Indexed: 01/28/2023] Open
Abstract
Structural biology of peptides presented by class I and class II MHC proteins has transformed immunology, impacting our understanding of fundamental immune mechanisms and allowing researchers to rationalize immunogenicity and design novel vaccines. However, proteins are not static structures as often inferred from crystallographic structures. Their components move and breathe individually and collectively over a range of timescales. Peptides bound within MHC peptide-binding grooves are no exception and their motions have been shown to impact recognition by T cell and other receptors in ways that influence function. Furthermore, peptides tune the motions of MHC proteins themselves, which impacts recognition of peptide/MHC complexes by other proteins. Here, we review the motional properties of peptides in MHC binding grooves and discuss how peptide properties can influence MHC motions. We briefly review theoretical concepts about protein motion and highlight key data that illustrate immunological consequences. We focus primarily on class I systems due to greater availability of data, but segue into class II systems as the concepts and consequences overlap. We suggest that characterization of the dynamic “energy landscapes” of peptide/MHC complexes and the resulting functional consequences is one of the next frontiers in structural immunology.
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Affiliation(s)
- Cory M Ayres
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, United States.,Harper Cancer Research Institute, University of Notre Dame, South Bend, IN, United States
| | - Steven A Corcelli
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, United States
| | - Brian M Baker
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, United States.,Harper Cancer Research Institute, University of Notre Dame, South Bend, IN, United States
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39
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Abstract
The interrogation of cell surface-presented immunogenic epitopes is of great importance to differentiate diseased cells in consequence to malignant transformation or viral infections. On the basis of this knowledge, next-generation immunotherapies against cancers, autoimmunity, or infectious diseases can be developed. The identification of altered peptide repertoires of transformed cells renders mass spectrometry-based analysis indispensable. This is evident considering the low correlation of gene or protein expression alterations, respectively, with changes in the peptide repertoire rendering those analyses less informative. Nevertheless, immunogenicity of peptides appearing to be exclusively found on diseased cells has to be finally proven in T cell-based assays. This review highlights the capabilities and limitations of mass spectrometry in the identification of entire immunopeptidomes, as well as individual potential immunogenic epitopes with a strong focus on cancer. Furthermore, an overview of state-of-the-art immunogenicity screens is presented.
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40
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Bentzen AK, Hadrup SR. Evolution of MHC-based technologies used for detection of antigen-responsive T cells. Cancer Immunol Immunother 2017; 66:657-666. [PMID: 28314956 PMCID: PMC5406421 DOI: 10.1007/s00262-017-1971-5] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 02/03/2017] [Indexed: 01/07/2023]
Abstract
T cell-mediated recognition of peptide-major histocompatibility complex (pMHC) class I and II molecules is crucial for the control of intracellular pathogens and cancer, as well as for stimulation and maintenance of efficient cytotoxic responses. Such interactions may also play a role in the development of autoimmune diseases. Novel insights into this mechanism are crucial to understanding disease development and establishing new treatment strategies. MHC multimers have been used for detection of antigen-responsive T cells since the first report by Altman et al. showed that tetramerization of pMHC class I molecules provided sufficient stability to T cell receptor (TCR)-pMHC interactions, allowing detection of MHC multimer-binding T cells using flow cytometry. Since this breakthrough the scientific community has aimed for expanding the capacity of MHC multimer-based detection technologies to facilitate large-scale epitope discovery and immune monitoring in limited biological material. Screening of T cell specificity using large libraries of pMHC molecules is suitable for analyses of T cell recognition potentially at genome-wide levels rather than analyses restricted to a selection of model antigens. Such strategies provide novel insights into the immune specificities involved in disease development and response to immunotherapy, and extend fundamental knowledge related to T cell recognition patterns and cross-recognition by TCRs. MHC multimer-based technologies have now evolved from detection of 1-2 different T cell specificities per cell sample, to include more than 1000 evaluable pMHC molecules using novel technologies. Here, we provide an overview of MHC multimer-based detection technologies developed over two decades, focusing primarily on MHC class I interactions.
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Affiliation(s)
- Amalie Kai Bentzen
- Section for Immunology and Vaccinology, National Veterinary Institute, Technical University of Denmark, Copenhagen, Denmark
| | - Sine Reker Hadrup
- Section for Immunology and Vaccinology, National Veterinary Institute, Technical University of Denmark, Copenhagen, Denmark.
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41
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Wieczorek M, Abualrous ET, Sticht J, Álvaro-Benito M, Stolzenberg S, Noé F, Freund C. Major Histocompatibility Complex (MHC) Class I and MHC Class II Proteins: Conformational Plasticity in Antigen Presentation. Front Immunol 2017. [PMID: 28367149 DOI: 10.3389/fimmu.2017.00292.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Antigen presentation by major histocompatibility complex (MHC) proteins is essential for adaptive immunity. Prior to presentation, peptides need to be generated from proteins that are either produced by the cell's own translational machinery or that are funneled into the endo-lysosomal vesicular system. The prolonged interaction between a T cell receptor and specific pMHC complexes, after an extensive search process in secondary lymphatic organs, eventually triggers T cells to proliferate and to mount a specific cellular immune response. Once processed, the peptide repertoire presented by MHC proteins largely depends on structural features of the binding groove of each particular MHC allelic variant. Additionally, two peptide editors-tapasin for class I and HLA-DM for class II-contribute to the shaping of the presented peptidome by favoring the binding of high-affinity antigens. Although there is a vast amount of biochemical and structural information, the mechanism of the catalyzed peptide exchange for MHC class I and class II proteins still remains controversial, and it is not well understood why certain MHC allelic variants are more susceptible to peptide editing than others. Recent studies predict a high impact of protein intermediate states on MHC allele-specific peptide presentation, which implies a profound influence of MHC dynamics on the phenomenon of immunodominance and the development of autoimmune diseases. Here, we review the recent literature that describe MHC class I and II dynamics from a theoretical and experimental point of view and we highlight the similarities between MHC class I and class II dynamics despite the distinct functions they fulfill in adaptive immunity.
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Affiliation(s)
- Marek Wieczorek
- Protein Biochemistry, Institute for Biochemistry, Freie Universität Berlin , Berlin , Germany
| | - Esam T Abualrous
- Computational Molecular Biology Group, Institute for Mathematics , Berlin , Germany
| | - Jana Sticht
- Protein Biochemistry, Institute for Biochemistry, Freie Universität Berlin , Berlin , Germany
| | - Miguel Álvaro-Benito
- Protein Biochemistry, Institute for Biochemistry, Freie Universität Berlin , Berlin , Germany
| | | | - Frank Noé
- Computational Molecular Biology Group, Institute for Mathematics , Berlin , Germany
| | - Christian Freund
- Protein Biochemistry, Institute for Biochemistry, Freie Universität Berlin , Berlin , Germany
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42
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Kuai R, Ochyl LJ, Bahjat KS, Schwendeman A, Moon JJ. Designer vaccine nanodiscs for personalized cancer immunotherapy. NATURE MATERIALS 2017; 16:489-496. [PMID: 28024156 PMCID: PMC5374005 DOI: 10.1038/nmat4822] [Citation(s) in RCA: 715] [Impact Index Per Article: 102.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Accepted: 11/08/2016] [Indexed: 05/04/2023]
Abstract
Despite the tremendous potential of peptide-based cancer vaccines, their efficacy has been limited in humans. Recent innovations in tumour exome sequencing have signalled the new era of personalized immunotherapy with patient-specific neoantigens, but a general methodology for stimulating strong CD8α+ cytotoxic T-lymphocyte (CTL) responses remains lacking. Here we demonstrate that high-density lipoprotein-mimicking nanodiscs coupled with antigen (Ag) peptides and adjuvants can markedly improve Ag/adjuvant co-delivery to lymphoid organs and sustain Ag presentation on dendritic cells. Strikingly, nanodiscs elicited up to 47-fold greater frequencies of neoantigen-specific CTLs than soluble vaccines and even 31-fold greater than perhaps the strongest adjuvant in clinical trials (that is, CpG in Montanide). Moreover, multi-epitope vaccination generated broad-spectrum T-cell responses that potently inhibited tumour growth. Nanodiscs eliminated established MC-38 and B16F10 tumours when combined with anti-PD-1 and anti-CTLA-4 therapy. These findings represent a new powerful approach for cancer immunotherapy and suggest a general strategy for personalized nanomedicine.
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Affiliation(s)
- Rui Kuai
- Department of Pharmaceutical Sciences, University of Michigan, Ann Arbor, MI 48109, USA
- Biointerfaces Institute, University of Michigan, Ann Arbor, MI 48109, USA
| | - Lukasz J. Ochyl
- Department of Pharmaceutical Sciences, University of Michigan, Ann Arbor, MI 48109, USA
- Biointerfaces Institute, University of Michigan, Ann Arbor, MI 48109, USA
| | - Keith S. Bahjat
- Discovery Research, Bristol-Myers Squibb Biologics Discovery California, Redwood City, CA
| | - Anna Schwendeman
- Department of Pharmaceutical Sciences, University of Michigan, Ann Arbor, MI 48109, USA
- Biointerfaces Institute, University of Michigan, Ann Arbor, MI 48109, USA
- Co-corresponding authors. J.J.M. () or A.S. ()
| | - James J. Moon
- Department of Pharmaceutical Sciences, University of Michigan, Ann Arbor, MI 48109, USA
- Biointerfaces Institute, University of Michigan, Ann Arbor, MI 48109, USA
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
- Co-corresponding authors. J.J.M. () or A.S. ()
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43
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Wieczorek M, Abualrous ET, Sticht J, Álvaro-Benito M, Stolzenberg S, Noé F, Freund C. Major Histocompatibility Complex (MHC) Class I and MHC Class II Proteins: Conformational Plasticity in Antigen Presentation. Front Immunol 2017; 8:292. [PMID: 28367149 PMCID: PMC5355494 DOI: 10.3389/fimmu.2017.00292] [Citation(s) in RCA: 566] [Impact Index Per Article: 80.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 02/28/2017] [Indexed: 11/21/2022] Open
Abstract
Antigen presentation by major histocompatibility complex (MHC) proteins is essential for adaptive immunity. Prior to presentation, peptides need to be generated from proteins that are either produced by the cell’s own translational machinery or that are funneled into the endo-lysosomal vesicular system. The prolonged interaction between a T cell receptor and specific pMHC complexes, after an extensive search process in secondary lymphatic organs, eventually triggers T cells to proliferate and to mount a specific cellular immune response. Once processed, the peptide repertoire presented by MHC proteins largely depends on structural features of the binding groove of each particular MHC allelic variant. Additionally, two peptide editors—tapasin for class I and HLA-DM for class II—contribute to the shaping of the presented peptidome by favoring the binding of high-affinity antigens. Although there is a vast amount of biochemical and structural information, the mechanism of the catalyzed peptide exchange for MHC class I and class II proteins still remains controversial, and it is not well understood why certain MHC allelic variants are more susceptible to peptide editing than others. Recent studies predict a high impact of protein intermediate states on MHC allele-specific peptide presentation, which implies a profound influence of MHC dynamics on the phenomenon of immunodominance and the development of autoimmune diseases. Here, we review the recent literature that describe MHC class I and II dynamics from a theoretical and experimental point of view and we highlight the similarities between MHC class I and class II dynamics despite the distinct functions they fulfill in adaptive immunity.
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Affiliation(s)
- Marek Wieczorek
- Protein Biochemistry, Institute for Biochemistry, Freie Universität Berlin , Berlin , Germany
| | - Esam T Abualrous
- Computational Molecular Biology Group, Institute for Mathematics , Berlin , Germany
| | - Jana Sticht
- Protein Biochemistry, Institute for Biochemistry, Freie Universität Berlin , Berlin , Germany
| | - Miguel Álvaro-Benito
- Protein Biochemistry, Institute for Biochemistry, Freie Universität Berlin , Berlin , Germany
| | | | - Frank Noé
- Computational Molecular Biology Group, Institute for Mathematics , Berlin , Germany
| | - Christian Freund
- Protein Biochemistry, Institute for Biochemistry, Freie Universität Berlin , Berlin , Germany
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44
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Thomas C, Tampé R. Proofreading of Peptide-MHC Complexes through Dynamic Multivalent Interactions. Front Immunol 2017; 8:65. [PMID: 28228754 PMCID: PMC5296336 DOI: 10.3389/fimmu.2017.00065] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Accepted: 01/16/2017] [Indexed: 11/18/2022] Open
Abstract
The adaptive immune system is able to detect and destroy cells that are malignantly transformed or infected by intracellular pathogens. Specific immune responses against these cells are elicited by antigenic peptides that are presented on major histocompatibility complex class I (MHC I) molecules and recognized by cytotoxic T lymphocytes at the cell surface. Since these MHC I-presented peptides are generated in the cytosol by proteasomal protein degradation, they can be metaphorically described as a window providing immune cells with insights into the state of the cellular proteome. A crucial element of MHC I antigen presentation is the peptide-loading complex (PLC), a multisubunit machinery, which contains as key constituents the transporter associated with antigen processing (TAP) and the MHC I-specific chaperone tapasin (Tsn). While TAP recognizes and shuttles the cytosolic antigenic peptides into the endoplasmic reticulum (ER), Tsn samples peptides in the ER for their ability to form stable complexes with MHC I, a process called peptide proofreading or peptide editing. Through its selection of peptides that improve MHC I stability, Tsn contributes to the hierarchy of immunodominant peptide epitopes. Despite the fact that it concerns a key event in adaptive immunity, insights into the catalytic mechanism of peptide proofreading carried out by Tsn have only lately been gained via biochemical, biophysical, and structural studies. Furthermore, a Tsn homolog called TAP-binding protein-related (TAPBPR) has only recently been demonstrated to function as a second MHC I-specific chaperone and peptide proofreader. Although TAPBPR is PLC-independent and has a distinct allomorph specificity, it is likely to share a common catalytic mechanism with Tsn. This review focuses on the current knowledge of the multivalent protein–protein interactions and the concomitant dynamic molecular processes underlying peptide-proofreading catalysis. We do not only derive a model that highlights the common mechanistic principles shared by the MHC I editors Tsn and TAPBPR, and the MHC II editor HLA-DM, but also illustrate the distinct quality control strategies employed by these chaperones to sample epitopes. Unraveling the mechanistic underpinnings of catalyzed peptide proofreading will be crucial for a thorough understanding of many aspects of immune recognition, from infection control and tumor immunity to autoimmune diseases and transplant rejection.
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Affiliation(s)
- Christoph Thomas
- Institute of Biochemistry, Biocenter, Goethe University Frankfurt , Frankfurt am Main , Germany
| | - Robert Tampé
- Institute of Biochemistry, Biocenter, Goethe University Frankfurt , Frankfurt am Main , Germany
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45
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Fisette O, Wingbermühle S, Tampé R, Schäfer LV. Molecular mechanism of peptide editing in the tapasin-MHC I complex. Sci Rep 2016; 6:19085. [PMID: 26754481 PMCID: PMC4709564 DOI: 10.1038/srep19085] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Accepted: 11/30/2015] [Indexed: 11/30/2022] Open
Abstract
Immune recognition of infected or malignantly transformed cells relies on antigenic peptides exposed at the cell surface by major histocompatibility complex class I (MHC I) molecules. Selection and loading of peptides onto MHC I is orchestrated by the peptide-loading complex (PLC), a multiprotein assembly whose structure has not yet been resolved. Tapasin, a central component of the PLC, stabilises MHC I and catalyses the exchange of low-affinity against high-affinity, immunodominant peptides. Up to now, the molecular basis of this peptide editing mechanism remained elusive. Here, using all-atom molecular dynamics (MD) simulations, we unravel the atomic details of how tapasin and antigen peptides act on the MHC I binding groove. Force distribution analysis reveals an intriguing molecular tug-of-war mechanism: only high-affinity peptides can exert sufficiently large forces to close the binding groove, thus overcoming the opposite forces exerted by tapasin to open it. Tapasin therefore accelerates the release of low-affinity peptides until a high-affinity antigen binds, promoting subsequent PLC break-down. Fluctuation and entropy analyses show how tapasin chaperones MHC I by stabilising it in a peptide-receptive conformation. Our results explain previous experiments and mark a key step towards a better understanding of adaptive immunity.
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Affiliation(s)
- Olivier Fisette
- Lehrstuhl für Theoretische Chemie, Ruhr-University Bochum, 44780, Germany
| | | | - Robert Tampé
- Institute of Biochemistry, Biocenter, Goethe-University Frankfurt, 60438, Germany
| | - Lars V. Schäfer
- Lehrstuhl für Theoretische Chemie, Ruhr-University Bochum, 44780, Germany
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Shim G, Kim G, Choi J, Yi T, Cho YK, Song SU, Byun Y, Oh YK. Biomimetic chimeric peptide-tethered hydrogels for human mesenchymal stem cell delivery. Colloids Surf B Biointerfaces 2015; 136:634-40. [DOI: 10.1016/j.colsurfb.2015.09.051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Revised: 08/11/2015] [Accepted: 09/26/2015] [Indexed: 01/11/2023]
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Abualrous ET, Saini SK, Ramnarayan VR, Ilca FT, Zacharias M, Springer S. The Carboxy Terminus of the Ligand Peptide Determines the Stability of the MHC Class I Molecule H-2Kb: A Combined Molecular Dynamics and Experimental Study. PLoS One 2015; 10:e0135421. [PMID: 26270965 PMCID: PMC4535769 DOI: 10.1371/journal.pone.0135421] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Accepted: 07/21/2015] [Indexed: 11/18/2022] Open
Abstract
Major histocompatibility complex (MHC) class I molecules (proteins) bind peptides of eight to ten amino acids to present them at the cell surface to cytotoxic T cells. The class I binding groove binds the peptide via hydrogen bonds with the peptide termini and via diverse interactions with the anchor residue side chains of the peptide. To elucidate which of these interactions is most important for the thermodynamic and kinetic stability of the peptide-bound state, we have combined molecular dynamics simulations and experimental approaches in an investigation of the conformational dynamics and binding parameters of a murine class I molecule (H-2Kb) with optimal and truncated natural peptide epitopes. We show that the F pocket region dominates the conformational and thermodynamic properties of the binding groove, and that therefore the binding of the C terminus of the peptide to the F pocket region plays a crucial role in bringing about the peptide-bound state of MHC class I.
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Affiliation(s)
- Esam Tolba Abualrous
- Department of Chemistry and Life Sciences, Jacobs University Bremen, Campus Ring 1, 28759 Bremen, Germany
- Department of Physics, Faculty of Science, Ain Shams University, Cairo, Egypt
| | - Sunil Kumar Saini
- Department of Chemistry and Life Sciences, Jacobs University Bremen, Campus Ring 1, 28759 Bremen, Germany
| | - Venkat Raman Ramnarayan
- Department of Chemistry and Life Sciences, Jacobs University Bremen, Campus Ring 1, 28759 Bremen, Germany
| | - Florin Tudor Ilca
- Department of Chemistry and Life Sciences, Jacobs University Bremen, Campus Ring 1, 28759 Bremen, Germany
| | - Martin Zacharias
- Physik-Department T38, Technische Universität München, James-Franck-Strasse 1, 85748 Garching, Germany
| | - Sebastian Springer
- Department of Chemistry and Life Sciences, Jacobs University Bremen, Campus Ring 1, 28759 Bremen, Germany
- * E-mail:
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48
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Tang B, Zhou W, Du J, He Y, Li Y. Identification of human leukemia antigen A*0201-restricted epitopes derived from epidermal growth factor pathway substrate number 8. Mol Med Rep 2015; 12:1741-52. [PMID: 25936538 PMCID: PMC4463842 DOI: 10.3892/mmr.2015.3673] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Accepted: 03/12/2015] [Indexed: 12/12/2022] Open
Abstract
T-cell-mediated immunotherapy of hematological malignancies requires selection of targeted tumor-associated antigens and T-cell epitopes contained in these tumor proteins. Epidermal growth factor receptor pathway substrate 8 (EPS8), whose function is pivotal for tumor proliferation, progression and metastasis, has been found to be overexpressed in most human tumor types, while its expression in normal tissue is low. The aim of the present study was to identify human leukemia antigen (HLA)-A*0201-restricted epitopes of EPS8 by using a reverse immunology approach. To achieve this, computer algorithms were used to predict HLA-A*0201 molecular binding, proteasome cleavage patterns as well as translocation of transporters associated with antigen processing. Candidate peptides were experimentally validated by T2 binding affinity assay and brefeldin-A decay assay. The functional avidity of peptide-specific cytotoxic T lymphocytes (CTLs) induced from peripheral blood mononuclear cells of healthy volunteers were evaluated by using an enzyme-linked immunosorbent spot assay and a cytotoxicity assay. Four peptides, designated as P455, P92, P276 and P360, had high affinity and stability of binding towards the HLA-A*0201 molecule, and specific CTLs induced by them significantly responded to the corresponding peptides and secreted IFN-γ. At the same time, the CTLs were able to specifically lyse EPS8-expressing cell lines in an HLA-A*0201-restricted manner. The present study demon-strated that P455, P92, P276 and P360 were CTL epitopes of EPS8, and were able to be used for epitope-defined adoptive T-cell transfer and multi-epitope-based vaccine design.
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Affiliation(s)
- Baishan Tang
- Department of Hematology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong 510280, P.R. China
| | - Weijun Zhou
- Department of Hematology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong 510280, P.R. China
| | - Jingwen Du
- Department of Hematology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong 510280, P.R. China
| | - Yanjie He
- Department of Hematology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong 510280, P.R. China
| | - Yuhua Li
- Department of Hematology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong 510280, P.R. China
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Alvarez-Navarro C, Martín-Esteban A, Barnea E, Admon A, López de Castro JA. Endoplasmic Reticulum Aminopeptidase 1 (ERAP1) Polymorphism Relevant to Inflammatory Disease Shapes the Peptidome of the Birdshot Chorioretinopathy-Associated HLA-A*29:02 Antigen. Mol Cell Proteomics 2015; 14:1770-80. [PMID: 25892735 DOI: 10.1074/mcp.m115.048959] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Indexed: 01/10/2023] Open
Abstract
Birdshot chorioretinopathy is a rare ocular inflammation whose genetic association with HLA-A*29:02 is the highest between a disease and a major histocompatibility complex (MHC) molecule. It belongs to a group of MHC-I-associated inflammatory disorders, also including ankylosing spondylitis, psoriasis, and Behçet's disease, for which endoplasmic reticulum aminopeptidases (ERAP) 1 and/or 2 have been identified as genetic risk factors. Since both enzymes are involved in the processing of MHC-I ligands, it seems reasonable that common peptide-mediated mechanisms may underlie the pathogenesis of these diseases. In this study, comparative immunopeptidomics was used to characterize >5000 A*29:02 ligands and quantify the effects of ERAP1 polymorphism and expression on the A*29:02 peptidome in human cells. The peptides predominant in an active ERAP1 context showed a higher frequency of nonamers and bulkier amino acid side chains at multiple positions, compared with the peptides predominant in a less active ERAP1 background. Thus, ERAP1 polymorphism has a large influence, shaping the A*29:02 peptidome through length-dependent and length-independent effects. These changes resulted in increased affinity and hydrophobicity of A*29:02 ligands in an active ERAP1 context. The results reveal the nature of the functional interaction between A*29:02 and ERAP1 and suggest that this enzyme may affect the susceptibility to birdshot chorioretinopathy by altering the A*29:02 peptidome. The complexity of these alterations is such that not only peptide presentation but also other potentially pathogenic features could be affected.
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Affiliation(s)
| | | | - Eilon Barnea
- §Faculty of Biology, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | - Arie Admon
- §Faculty of Biology, Technion-Israel Institute of Technology, Haifa 32000, Israel
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Transport and quality control of MHC class I molecules in the early secretory pathway. Curr Opin Immunol 2015; 34:83-90. [PMID: 25771183 DOI: 10.1016/j.coi.2015.02.009] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2015] [Revised: 02/21/2015] [Accepted: 02/24/2015] [Indexed: 12/26/2022]
Abstract
Folding and peptide binding of major histocompatibility complex (MHC) class I molecules have been thoroughly researched, but the mechanistic connection between these biochemical events and the progress of class I through the early secretory pathway is much less well understood. This review focuses on the question how the partially assembled forms of class I (which lack high-affinity peptide and/or the light chain beta-2 microglobulin) are retained inside the cell. Such investigations offer researchers exciting chances to understand the connections between class I structure, conformational dynamics, peptide binding kinetics and thermodynamics, intracellular transport, and antigen presentation.
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