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Mathews R, Hinds MT, Nguyen KP. Venous thromboembolism: diagnostic advances and unaddressed challenges in management. Curr Opin Hematol 2024; 31:122-129. [PMID: 38359323 PMCID: PMC10977858 DOI: 10.1097/moh.0000000000000809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
PURPOSE OF REVIEW This review summarizes recent advances in developing targeted diagnostics for venous thromboembolism (VTE) and unaddressed knowledge gaps in patient management. Without addressing these critical data needs, the morbidity in VTE patients will persist. RECENT FINDINGS Recent studies investigating plasma protein profiles in VTE patients have identified key diagnostic targets to address the currently unmet need for low-cost, confirmatory, point-of-care VTE diagnostics. These studies and a growing body of evidence from animal model studies have revealed the importance of inflammatory and vascular pathology in driving VTE, which are currently unaddressed targets for VTE therapy. To enhance the translation of preclinical animal studies, clinical quantification of thrombus burden and comparative component analyses between modeled VTE and clinical VTE are necessary. SUMMARY Lead candidates from protein profiling of VTE patients' plasma offer a promising outlook in developing low cost, confirmatory, point-of-care testing for VTE. Additionally, addressing the critical knowledge gap of quantitatively measuring clinical thrombi will allow for an array of benefits in VTE management and informing the translatability of experimental therapeutics.
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Affiliation(s)
- Rick Mathews
- Department of Biomedical Engineering, Oregon Health and Science University
| | - Monica T Hinds
- Department of Biomedical Engineering, Oregon Health and Science University
| | - Khanh P Nguyen
- Department of Biomedical Engineering, Oregon Health and Science University
- Research & Development Service, VA Portland Healthcare System
- Division of Vascular Surgery, Department of Surgery, Oregon Health and Science University, Portland, Oregon, USA
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2
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Gomez-Zepeda D, Arnold-Schild D, Beyrle J, Declercq A, Gabriels R, Kumm E, Preikschat A, Łącki MK, Hirschler A, Rijal JB, Carapito C, Martens L, Distler U, Schild H, Tenzer S. Thunder-DDA-PASEF enables high-coverage immunopeptidomics and is boosted by MS 2Rescore with MS 2PIP timsTOF fragmentation prediction model. Nat Commun 2024; 15:2288. [PMID: 38480730 PMCID: PMC10937930 DOI: 10.1038/s41467-024-46380-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 02/26/2024] [Indexed: 03/17/2024] Open
Abstract
Human leukocyte antigen (HLA) class I peptide ligands (HLAIps) are key targets for developing vaccines and immunotherapies against infectious pathogens or cancer cells. Identifying HLAIps is challenging due to their high diversity, low abundance, and patient individuality. Here, we develop a highly sensitive method for identifying HLAIps using liquid chromatography-ion mobility-tandem mass spectrometry (LC-IMS-MS/MS). In addition, we train a timsTOF-specific peak intensity MS2PIP model for tryptic and non-tryptic peptides and implement it in MS2Rescore (v3) together with the CCS predictor from ionmob. The optimized method, Thunder-DDA-PASEF, semi-selectively fragments singly and multiply charged HLAIps based on their IMS and m/z. Moreover, the method employs the high sensitivity mode and extended IMS resolution with fewer MS/MS frames (300 ms TIMS ramp, 3 MS/MS frames), doubling the coverage of immunopeptidomics analyses, compared to the proteomics-tailored DDA-PASEF (100 ms TIMS ramp, 10 MS/MS frames). Additionally, rescoring boosts the HLAIps identification by 41.7% to 33%, resulting in 5738 HLAIps from as little as one million JY cell equivalents, and 14,516 HLAIps from 20 million. This enables in-depth profiling of HLAIps from diverse human cell lines and human plasma. Finally, profiling JY and Raji cells transfected to express the SARS-CoV-2 spike protein results in 16 spike HLAIps, thirteen of which have been reported to elicit immune responses in human patients.
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Affiliation(s)
- David Gomez-Zepeda
- Institute of Immunology, University Medical Center of the Johannes-Gutenberg University, Mainz, Germany.
- Helmholtz Institute for Translational Oncology Mainz (HI-TRON Mainz) - A Helmholtz Institute of the DKFZ, Mainz, Germany.
- German Cancer Research Center (DKFZ) Heidelberg, Division 191, Heidelberg, Germany.
| | - Danielle Arnold-Schild
- Institute of Immunology, University Medical Center of the Johannes-Gutenberg University, Mainz, Germany
| | - Julian Beyrle
- Institute of Immunology, University Medical Center of the Johannes-Gutenberg University, Mainz, Germany
- Helmholtz Institute for Translational Oncology Mainz (HI-TRON Mainz) - A Helmholtz Institute of the DKFZ, Mainz, Germany
- German Cancer Research Center (DKFZ) Heidelberg, Division 191, Heidelberg, Germany
| | - Arthur Declercq
- VIB-UGent Center for Medical Biotechnology, VIB, Ghent, Belgium
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
| | - Ralf Gabriels
- VIB-UGent Center for Medical Biotechnology, VIB, Ghent, Belgium
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
| | - Elena Kumm
- Institute of Immunology, University Medical Center of the Johannes-Gutenberg University, Mainz, Germany
| | - Annica Preikschat
- Institute of Immunology, University Medical Center of the Johannes-Gutenberg University, Mainz, Germany
| | - Mateusz Krzysztof Łącki
- Institute of Immunology, University Medical Center of the Johannes-Gutenberg University, Mainz, Germany
| | - Aurélie Hirschler
- BioOrganic Mass Spectrometry Laboratory (LSMBO), IPHC UMR 7178, University of Strasbourg, CNRS, ProFI - FR2048, Strasbourg, France
| | - Jeewan Babu Rijal
- BioOrganic Mass Spectrometry Laboratory (LSMBO), IPHC UMR 7178, University of Strasbourg, CNRS, ProFI - FR2048, Strasbourg, France
| | - Christine Carapito
- BioOrganic Mass Spectrometry Laboratory (LSMBO), IPHC UMR 7178, University of Strasbourg, CNRS, ProFI - FR2048, Strasbourg, France
| | - Lennart Martens
- VIB-UGent Center for Medical Biotechnology, VIB, Ghent, Belgium
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
| | - Ute Distler
- Institute of Immunology, University Medical Center of the Johannes-Gutenberg University, Mainz, Germany
- Research Center for Immunotherapy (FZI), University Medical Center of the Johannes-Gutenberg University, Mainz, Germany
| | - Hansjörg Schild
- Institute of Immunology, University Medical Center of the Johannes-Gutenberg University, Mainz, Germany
- Research Center for Immunotherapy (FZI), University Medical Center of the Johannes-Gutenberg University, Mainz, Germany
| | - Stefan Tenzer
- Institute of Immunology, University Medical Center of the Johannes-Gutenberg University, Mainz, Germany.
- Helmholtz Institute for Translational Oncology Mainz (HI-TRON Mainz) - A Helmholtz Institute of the DKFZ, Mainz, Germany.
- German Cancer Research Center (DKFZ) Heidelberg, Division 191, Heidelberg, Germany.
- Research Center for Immunotherapy (FZI), University Medical Center of the Johannes-Gutenberg University, Mainz, Germany.
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Ciszewski A, Jarosz ŁS, Michalak K, Marek A, Grądzki Z, Wawrzykowski J, Szymczak B, Rysiak A. Proteome and Peptidome Changes and Zn Concentration in Chicken after In Ovo Stimulation with a Multi-Strain Probiotic and Zn-Gly Chelate: Preliminary Research. Curr Issues Mol Biol 2024; 46:1259-1280. [PMID: 38392198 PMCID: PMC10888147 DOI: 10.3390/cimb46020080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 01/26/2024] [Accepted: 01/29/2024] [Indexed: 02/24/2024] Open
Abstract
The aim of the study was to determine differences in the proteome and peptidome and zinc concentrations in the serum and tissues of chickens supplemented with a multi-strain probiotic and/or zinc glycine chelate in ovo. A total of 1400 fertilized broiler eggs (Ross × Ross 708) were divided into four groups: a control and experimental groups injected with a multi-strain probiotic, with zinc glycine chelate, and with the multi-strain probiotic and zinc glycine chelate. The proteome and peptidome were analyzed using SDS-PAGE and MALDI-TOF MS, and the zinc concentration was determined by flame atomic absorption spectrometry. We showed that in ovo supplementation with zinc glycine chelate increased the Zn concentration in the serum and yolk sac at 12 h post-hatch. The results of SDS-PAGE and western blot confirmed the presence of Cu/Zn SOD in the liver and in the small and large intestines at 12 h and at 7 days after hatching in all groups. Analysis of the MALDI-TOF MS spectra of chicken tissues showed in all experimental groups the expression of proteins and peptides that regulate immune response, metabolic processes, growth, development, and reproduction.
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Affiliation(s)
- Artur Ciszewski
- Department of Epizootiology and Clinic of Infectious Diseases, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Głęboka 30, 20-612 Lublin, Poland
| | - Łukasz S Jarosz
- Department of Epizootiology and Clinic of Infectious Diseases, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Głęboka 30, 20-612 Lublin, Poland
| | - Katarzyna Michalak
- Department of Epizootiology and Clinic of Infectious Diseases, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Głęboka 30, 20-612 Lublin, Poland
| | - Agnieszka Marek
- Sub-Department of Preventive Veterinary and Avian Diseases, Faculty of Veterinary Medicine, Institute of Biological Bases of Animal Diseases, University of Life Sciences in Lublin, Głęboka 30, 20-612 Lublin, Poland
| | - Zbigniew Grądzki
- Department of Epizootiology and Clinic of Infectious Diseases, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Głęboka 30, 20-612 Lublin, Poland
| | - Jacek Wawrzykowski
- Department of Biochemistry, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Głęboka 30, 20-612 Lublin, Poland
| | - Bartłomiej Szymczak
- Sub-Department of Pathophysiology, Department of Preclinical of Veterinary Sciences, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Głęboka 30, 20-612 Lublin, Poland
| | - Anna Rysiak
- Department of Botany, Mycology, and Ecology, Maria Curie-Skłodowska University, Akademicka 19, 20-033 Lublin, Poland
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Targeting immunoproteasome in neurodegeneration: A glance to the future. Pharmacol Ther 2023; 241:108329. [PMID: 36526014 DOI: 10.1016/j.pharmthera.2022.108329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 12/02/2022] [Accepted: 12/05/2022] [Indexed: 12/15/2022]
Abstract
The immunoproteasome is a specialized form of proteasome equipped with modified catalytic subunits that was initially discovered to play a pivotal role in MHC class I antigen processing and immune system modulation. However, over the last years, this proteolytic complex has been uncovered to serve additional functions unrelated to antigen presentation. Accordingly, it has been proposed that immunoproteasome synergizes with canonical proteasome in different cell types of the nervous system, regulating neurotransmission, metabolic pathways and adaptation of the cells to redox or inflammatory insults. Hence, studying the alterations of immunoproteasome expression and activity is gaining research interest to define the dynamics of neuroinflammation as well as the early and late molecular events that are likely involved in the pathogenesis of a variety of neurological disorders. Furthermore, these novel functions foster the perspective of immunoproteasome as a potential therapeutic target for neurodegeneration. In this review, we provide a brain and retina-wide overview, trying to correlate present knowledge on structure-function relationships of immunoproteasome with the variety of observed neuro-modulatory functions.
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Wellington D, Yin Z, Kessler BM, Dong T. Immunodominance complexity: lessons yet to be learned from dominant T cell responses to SARS-COV-2. Curr Opin Virol 2021; 50:183-191. [PMID: 34534732 PMCID: PMC8424056 DOI: 10.1016/j.coviro.2021.08.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 08/27/2021] [Accepted: 08/31/2021] [Indexed: 11/14/2022]
Abstract
Immunodominance is a complex and highly debated topic of T cell biology. The current SARS-CoV-2 pandemic has provided the opportunity to profile adaptive immune responses and determine molecular factors contributing to emerging responses towards immunodominant viral epitopes. Here, we discuss parameters that alter the dynamics of CD8 viral epitope processing, generation and T-cell responses, and how immunodominance counteracts viral immune escape mechanisms that develop in the context of emerging SARS-CoV-2 variants.
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Affiliation(s)
- Dannielle Wellington
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, Oxford University, Oxford, OX3 9DS, UK; Chinese Academy of Medical Sciences (CAMS) Oxford Institute, Nuffield Department of Medicine, Oxford University, Oxford, OX3 7BN, UK.
| | - Zixi Yin
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, Oxford University, Oxford, OX3 9DS, UK; Chinese Academy of Medical Sciences (CAMS) Oxford Institute, Nuffield Department of Medicine, Oxford University, Oxford, OX3 7BN, UK
| | - Benedikt M Kessler
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, Oxford University, Oxford, OX3 9DS, UK; Target Discovery Institute, Nuffield Department of Medicine, Oxford University, Oxford, OX3 7BN, UK
| | - Tao Dong
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, Oxford University, Oxford, OX3 9DS, UK; Chinese Academy of Medical Sciences (CAMS) Oxford Institute, Nuffield Department of Medicine, Oxford University, Oxford, OX3 7BN, UK.
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6
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van den Biggelaar RHGA, van der Maas L, Meiring HD, Pennings JLA, van Eden W, Rutten VPMG, Jansen CA. Proteomic analysis of chicken bone marrow-derived dendritic cells in response to an inactivated IBV + NDV poultry vaccine. Sci Rep 2021; 11:12666. [PMID: 34135356 PMCID: PMC8209092 DOI: 10.1038/s41598-021-89810-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 04/30/2021] [Indexed: 02/05/2023] Open
Abstract
Inactivated poultry vaccines are subject to routine potency testing for batch release, requiring large numbers of animals. The replacement of in vivo tests for cell-based alternatives can be facilitated by the identification of biomarkers for vaccine-induced immune responses. In this study, chicken bone marrow-derived dendritic cells were stimulated with an inactivated vaccine for infectious bronchitis virus and Newcastle disease virus, as well as inactivated infectious bronchitis virus only, and lipopolysaccharides as positive control, or left unstimulated for comparison with the stimulated samples. Next, the cells were lysed and subjected to proteomic analysis. Stimulation with the vaccine resulted in 66 differentially expressed proteins associated with mRNA translation, immune responses, lipid metabolism and the proteasome. For the eight most significantly upregulated proteins, mRNA expression levels were assessed. Markers that showed increased expression at both mRNA and protein levels included PLIN2 and PSMB1. Stimulation with infectious bronchitis virus only resulted in 25 differentially expressed proteins, which were mostly proteins containing Src homology 2 domains. Stimulation with lipopolysaccharides resulted in 118 differentially expressed proteins associated with dendritic cell maturation and antimicrobial activity. This study provides leads to a better understanding of the activation of dendritic cells by an inactivated poultry vaccine, and identified PLIN2 and PSMB1 as potential biomarkers for cell-based potency testing.
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Affiliation(s)
- Robin H G A van den Biggelaar
- Division of Infectious Diseases and Immunology, Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | | | - Hugo D Meiring
- Intravacc (Institute for Translational Vaccinology), Bilthoven, The Netherlands
| | - Jeroen L A Pennings
- Centre for Health Protection, National Institute for Public Health and the Environment (RIVM), Utrecht, The Netherlands
| | - Willem van Eden
- Division of Infectious Diseases and Immunology, Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Victor P M G Rutten
- Division of Infectious Diseases and Immunology, Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
- Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa
| | - Christine A Jansen
- Division of Infectious Diseases and Immunology, Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands.
- Cell Biology and Immunology Group, Department of Animal Sciences, Wageningen University and Research, Wageningen, The Netherlands.
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PPAD Activity Promotes Outer Membrane Vesicle Biogenesis and Surface Translocation by Porphyromonas gingivalis. J Bacteriol 2021; 203:JB.00343-20. [PMID: 33257525 PMCID: PMC7847538 DOI: 10.1128/jb.00343-20] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 11/22/2020] [Indexed: 12/27/2022] Open
Abstract
Gram-negative bacteria produce nanosized OMVs that are actively released into their surroundings. The oral anaerobe P. gingivalis is prolific in OMV production, and many of the proteins packaged in these vesicles are proteolytic or protein-modifying enzymes. Many bacteria switch between a sessile and a motile mode in response to environmental and host-related signals. Porphyromonas gingivalis, an oral anaerobe implicated in the etiology of chronic periodontal disease, has long been described as a nonmotile bacterium. And yet, recent studies have shown that under certain conditions, P. gingivalis is capable of surface translocation. Considering these findings, this work aimed to increase our understanding of how P. gingivalis transitions between sessile growth and surface migration. Here, we show that the peptidylarginine deiminase secreted by P. gingivalis (PPAD), an enzyme previously shown to be upregulated during surface translocation and to constrain biofilm formation, promotes surface translocation. In the absence of PPAD, the production of outer membrane vesicles (OMVs) was drastically reduced. In turn, there was a reduction in gingipain-mediated proteolysis and a reduced zone of hydration around the site of inoculation. Transcriptome sequencing (RNA-Seq) and metabolomics analyses also showed that these changes corresponded to a shift in arginine metabolism. Overall, this report provides new evidence for the functional relevance of PPAD and proteases, as well as the importance of PPAD activity in OMV biogenesis and release. Our findings support the model that citrullination is a critical mechanism during lifestyle transition between surface-attached growth and surface translocation by modulating OMV-mediated proteolysis and arginine metabolism. IMPORTANCE Gram-negative bacteria produce nanosized OMVs that are actively released into their surroundings. The oral anaerobe P. gingivalis is prolific in OMV production, and many of the proteins packaged in these vesicles are proteolytic or protein-modifying enzymes. This includes key virulence determinants, such as the gingipains and PPAD (a unique peptidylarginine deiminase). Here, we show that PPAD activity (citrullination) is involved in OMV biogenesis. The study revealed an unusual mechanism that allows this bacterium to transform its surroundings. Since OMVs are detected in circulation and in systemic tissues, our study results also support the notion that PPAD activity may be a key factor in the correlation between periodontitis and systemic diseases, further supporting the idea of PPAD as an important therapeutic target.
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Hossain MS, Hossan MI, Mizan S, Moin AT, Yasmin F, Akash AS, Powshi SN, Hasan AR, Chowdhury AS. Immunoinformatics approach to designing a multi-epitope vaccine against Saint Louis Encephalitis Virus. INFORMATICS IN MEDICINE UNLOCKED 2021. [DOI: 10.1016/j.imu.2020.100500] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
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Wu H, Li L, Chen KM, Homolka D, Gos P, Fleury-Olela F, McCarthy AA, Pillai RS. Decapping Enzyme NUDT12 Partners with BLMH for Cytoplasmic Surveillance of NAD-Capped RNAs. Cell Rep 2020; 29:4422-4434.e13. [PMID: 31875550 DOI: 10.1016/j.celrep.2019.11.108] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 10/23/2019] [Accepted: 11/26/2019] [Indexed: 12/21/2022] Open
Abstract
RNA polymerase II transcripts receive a protective 5',5'-triphosphate-linked 7-methylguanosine (m7G) cap, and its removal by decapping enzymes like DCP2 is critical for initiation of RNA decay. Alternative RNA caps can be acquired when transcription initiation uses metabolites like nicotinamide adenine dinucleotide (NAD), generating NAD-RNAs. Here, we identify human NUDT12 as a cytosolic NAD-RNA decapping enzyme. NUDT12 is active only as homodimers, with each monomer contributing to creation of the two functional catalytic pockets. We identify an ∼600-kDa dodecamer complex between bleomycin hydrolase (BLMH) and NUDT12, with BLMH being required for localization of NUDT12 to a few discrete cytoplasmic granules that are distinct from P-bodies. Both proteins downregulate gene expression when artificially tethered to a reporter RNA in vivo. Furthermore, loss of Nudt12 results in a significant upregulation of circadian clock transcripts in mouse liver. Overall, our study points to a physiological role for NUDT12 in the cytosolic surveillance of NAD-RNAs.
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Affiliation(s)
- Hao Wu
- Department of Molecular Biology, Science III, University of Geneva, 30 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland
| | - Lingyun Li
- Department of Molecular Biology, Science III, University of Geneva, 30 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland
| | - Kuan-Ming Chen
- Department of Molecular Biology, Science III, University of Geneva, 30 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland
| | - David Homolka
- Department of Molecular Biology, Science III, University of Geneva, 30 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland
| | - Pascal Gos
- Department of Molecular Biology, Science III, University of Geneva, 30 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland
| | - Fabienne Fleury-Olela
- Department of Molecular Biology, Science III, University of Geneva, 30 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland
| | - Andrew A McCarthy
- European Molecular Biology Laboratory, Grenoble Outstation, 71 avenue des Martyrs, 38042 Grenoble, France
| | - Ramesh S Pillai
- Department of Molecular Biology, Science III, University of Geneva, 30 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland.
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Dhanavade MJ, Sonawane KD. Amyloid beta peptide-degrading microbial enzymes and its implication in drug design. 3 Biotech 2020; 10:247. [PMID: 32411571 PMCID: PMC7214582 DOI: 10.1007/s13205-020-02240-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 04/30/2020] [Indexed: 12/19/2022] Open
Abstract
Alzheimer's disease (AD) is a chronic and progressive neurological brain disorder. AD pathophysiology is mainly represented by formation of neuritic plaques and neurofibrillary tangles (NFTs). Neuritic plaques are made up of amyloid beta (Aβ) peptides, which play a central role in AD pathogenesis. In AD brain, Aβ peptide accumulates due to overproduction, insufficient clearance and defective proteolytic degradation. The degradation and cleavage mechanism of Aβ peptides by several human enzymes have been discussed previously. In the mean time, numerous experimental and bioinformatics reports indicated the significance of microbial enzymes having potential to degrade Aβ peptides. Thus, there is a need to shift the focus toward the substrate specificity and structure-function relationship of Aβ peptide-degrading microbial enzymes. Hence, in this review, we discussed in vitro and in silico studies of microbial enzymes viz. cysteine protease and zinc metallopeptidases having ability to degrade Aβ peptides. In silico study showed that cysteine protease can cleave Aβ peptide between Lys16-Cys17; similarly, several other enzymes also showed capability to degrade Aβ peptide at different sites. Thus, this review paves the way to explore the role of microbial enzymes in Aβ peptide degradation and to design new lead compounds for AD treatment.
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Affiliation(s)
- Maruti J. Dhanavade
- Department of Microbiology, Shivaji University, Kolhapur, Maharashtra 416004 India
| | - Kailas D. Sonawane
- Structural Bioinformatics Unit, Department of Biochemistry, Shivaji University, Kolhapur, Maharashtra 416004 India
- Department of Microbiology, Shivaji University, Kolhapur, Maharashtra 416004 India
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Knottenbelt DC, Watson AH, Hotchkiss JW, Chopra S, Higgins AJ. A pilot study on the use of ultra‐deformable liposomes containing bleomycin in the treatment of equine sarcoid. EQUINE VET EDUC 2020. [DOI: 10.1111/eve.12950] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - A. H. Watson
- Department of Veterinary Medicine University of Cambridge UK
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Riise R, Odqvist L, Mattsson J, Monkley S, Abdillahi SM, Tyrchan C, Muthas D, Yrlid LF. Bleomycin hydrolase regulates the release of chemokines important for inflammation and wound healing by keratinocytes. Sci Rep 2019; 9:20407. [PMID: 31892708 PMCID: PMC6938525 DOI: 10.1038/s41598-019-56667-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 12/09/2019] [Indexed: 11/09/2022] Open
Abstract
Bleomycin hydrolase (BLMH) is a well-conserved cysteine protease widely expressed in several mammalian tissues. In skin, which contains high levels of BLMH, this protease is involved in the degradation of citrullinated filaggrin monomers into free amino acids important for skin hydration. Interestingly, the expression and activity of BLMH is reduced in patients with atopic dermatitis (AD) and psoriasis, and BLMH knockout mice acquire tail dermatitis. Apart from its already known function, we have discovered a novel role of BLMH in the regulation of inflammatory chemokines and wound healing. We show that lowered BLMH levels in keratinocytes result in increased release of the pro-inflammatory chemokines CXCL8 and GROα, which are upregulated in skin from AD patients compared to healthy individuals. Conditioned media from keratinocytes expressing low levels of BLMH increased chemotaxis by neutrophils and caused a delayed wound healing in the presence of low-level TNFα. This defective wound healing was improved by blocking the shared receptor of CXCL8 and GROα, namely CXCR2, using a specific receptor antagonist. Collectively, our results present a novel function of BLMH in regulating the secretion of chemokines involved in inflammation and wound healing in human keratinocytes.
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Affiliation(s)
- Rebecca Riise
- Bioscience COPD/IPF, Research and Early Development, Respiratory, Inflammation and Autoimmune (RIA), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Lina Odqvist
- Bioscience COPD/IPF, Research and Early Development, Respiratory, Inflammation and Autoimmune (RIA), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Johan Mattsson
- Translational Science & Experimental Medicine, Research and Early Development, Respiratory, Inflammation and Autoimmune (RIA), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Susan Monkley
- Translational Science & Experimental Medicine, Research and Early Development, Respiratory, Inflammation and Autoimmune (RIA), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Suado M Abdillahi
- Bioscience COPD/IPF, Research and Early Development, Respiratory, Inflammation and Autoimmune (RIA), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Christian Tyrchan
- Medicinal Chemistry, Research and Early Development, Respiratory, Inflammation and Autoimmune (RIA), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Daniel Muthas
- Translational Science & Experimental Medicine, Research and Early Development, Respiratory, Inflammation and Autoimmune (RIA), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Linda Fahlén Yrlid
- Bioscience COPD/IPF, Research and Early Development, Respiratory, Inflammation and Autoimmune (RIA), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden.
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13
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Tomkinson B. Tripeptidyl-peptidase II: Update on an oldie that still counts. Biochimie 2019; 166:27-37. [DOI: 10.1016/j.biochi.2019.05.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 05/14/2019] [Indexed: 12/30/2022]
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14
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Moradali MF, Ghods S, Angelini TE, Davey ME. Amino acids as wetting agents: surface translocation by Porphyromonas gingivalis. THE ISME JOURNAL 2019; 13:1560-1574. [PMID: 30783212 PMCID: PMC6775972 DOI: 10.1038/s41396-019-0360-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 01/11/2019] [Accepted: 01/17/2019] [Indexed: 02/06/2023]
Abstract
Our understanding of how oral microbiota adapt in response to changes in their surroundings remains limited. This is particularly true of the slow-growing anaerobes that persist below the gum line. Here, we report that the oral anaerobe Porphyromonas gingivalis strain 381 can surface translocate when sandwiched between two surfaces. We show that during movement, this bacterium alters its metabolism, specifically side products of arginine utilization including citrulline and ornithine accumulated in the translocating cells; while arginine, N-acetyl-arginine, and the polyamine putrescine, which is produced from arginine were consumed. In addition, our results indicate that movement requires modification of the surrounding environment via proteolysis, cell dispersion, cell-on-cell rolling, and sub-diffusive cell-driven motility. We also show that production of fimbriae and fimbriae-associated proteins; as well as the regulation of contact-dependent growth inhibition genes, which are known to be involved in self-nonself discrimination, and the type IX secretion system are central to surface translocation. These studies provide a first glimpse into P. gingivalis motility and its relationship to ecological variables.
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Affiliation(s)
- M Fata Moradali
- Department of Oral Biology, College of Dentistry, University of Florida, Gainesville, FL, 32610, USA
| | - Shirin Ghods
- Department of Oral Biology, College of Dentistry, University of Florida, Gainesville, FL, 32610, USA
| | - Thomas E Angelini
- Department of Mechanical & Aerospace Engineering, University of Florida, Gainesville, FL, 32610, USA
| | - Mary Ellen Davey
- Department of Oral Biology, College of Dentistry, University of Florida, Gainesville, FL, 32610, USA.
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15
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Basler M, Groettrup M. Testing the Impact of Protease Inhibitors in Antigen Presentation Assays. Methods Mol Biol 2019; 1988:59-69. [PMID: 31147932 DOI: 10.1007/978-1-4939-9450-2_5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
The major histocompatibility complex (MHC) class I restricted pathway of antigen processing allows the presentation of intracellular antigens to cytotoxic T lymphocytes. The proteasome is the main protease in the cytoplasm and the nucleus, which is responsible for the generation of most peptide ligands of MHC-I molecules. Peptides produced by the proteasome can be further trimmed or destroyed by numerous cytosolic or endoplasmic reticulum (ER) luminal proteases. Small molecule inhibitors are useful tools for probing the role of proteases in MHC class I antigen processing. Here, we describe different methods to test the impact of protease inhibitors in antigen presentation assays.
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Affiliation(s)
- Michael Basler
- Biotechnology Institute Thurgau at the University of Konstanz, Kreuzlingen, Switzerland. .,Division of Immunology, Department of Biology, University of Konstanz, Konstanz, Germany.
| | - Marcus Groettrup
- Biotechnology Institute Thurgau at the University of Konstanz, Kreuzlingen, Switzerland.,Division of Immunology, Department of Biology, University of Konstanz, Konstanz, Germany
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16
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Wei B, Yang Z, Cheng Y, Zhou J, Yang H, Zhang L, Yang X. Proteomic Analysis of the Hepatopancreas of Chinese Mitten Crabs ( Eriocheir sinensis) Fed With a Linoleic Acid or α-Linolenic Acid Diet. Front Physiol 2018; 9:1430. [PMID: 30364271 PMCID: PMC6192328 DOI: 10.3389/fphys.2018.01430] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2018] [Accepted: 09/20/2018] [Indexed: 11/13/2022] Open
Abstract
As representatives of n-6 and n-3 fatty acids, many studies have analyzed the use of soybean oil and linseed oil rich in linoleic acid (18:2n-6, LA) and α-linolenic acid (18:3n-3, LNA) as better substitutes for fish oil. In aquatic animals, different dietary ratios of LA and LNA could have significant effects on growth, lipid metabolism, immune response, and reproduction. To assess the nutritive value of these two fatty acids in Chinese mitten crab (Eriocheir sinensis), we performed transcriptome analysis and label-free quantification proteomic analysis of the hepatopancreas from mitten crabs fed with LA or LNA diet. Parallel reaction monitoring was used to confirm the reliability of the proteomic analysis. A total of 186 proteins were differentially expressed with fold change ≥1.5 or ≤0.666. Among the 186 proteins, 116 were upregulated and 70 were downregulated in the LA than LNA. Most of these proteins participate in cellular process and metabolism process and have molecular functions such as binding and catalytic activity; the cellular component of these proteins are cell, cell part, membrane, and membrane part. A total of 18 proteins were identified to be related to lipid, carbohydrate, and protein metabolism, and they mainly participate in digestive enzyme activities, fatty acid transport, and glycolysis. Our results provide new insights for further investigation into the replacement of fish oil from mitten crabs with vegetable oils and enable us to better understand the different roles and nutrition value of LA and LNA in mitten crabs.
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Affiliation(s)
- Banghong Wei
- Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China.,Centre for Research on Environmental Ecology and Fish Nutrition, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China.,National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China
| | - Zhigang Yang
- Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China.,Centre for Research on Environmental Ecology and Fish Nutrition, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China.,National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China
| | - Yongxu Cheng
- Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China.,Centre for Research on Environmental Ecology and Fish Nutrition, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China.,National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China
| | - Junyu Zhou
- Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China.,Centre for Research on Environmental Ecology and Fish Nutrition, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China.,National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China
| | - Hang Yang
- Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China.,Centre for Research on Environmental Ecology and Fish Nutrition, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China.,National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China
| | - Long Zhang
- Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China.,Centre for Research on Environmental Ecology and Fish Nutrition, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China.,National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China
| | - Xiaozhen Yang
- Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China.,Centre for Research on Environmental Ecology and Fish Nutrition, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China.,National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China
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17
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Vigneron N, Ferrari V, Van den Eynde BJ, Cresswell P, Leonhardt RM. Cytosolic Processing Governs TAP-Independent Presentation of a Critical Melanoma Antigen. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2018; 201:1875-1888. [PMID: 30135181 PMCID: PMC6457910 DOI: 10.4049/jimmunol.1701479] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 07/26/2018] [Indexed: 12/30/2022]
Abstract
Cancer immunotherapy has been flourishing in recent years with remarkable clinical success. But as more patients are treated, a shadow is emerging that has haunted other cancer therapies: tumors develop resistance. Resistance is often caused by defects in the MHC class I Ag presentation pathway critical for CD8 T cell-mediated tumor clearance. TAP and tapasin, both key players in the pathway, are frequently downregulated in human cancers, correlating with poor patient survival. Reduced dependence on these factors may promote vaccine efficiency by limiting immune evasion. In this study, we demonstrate that PMEL209-217, a promising phase 3 trial-tested antimelanoma vaccine candidate, is robustly presented by various TAP- and/or tapasin-deficient cell lines. This striking characteristic may underlie its potency as a vaccine. Surprisingly, cytosolic proteasomes generate the peptide even for TAP-independent presentation, whereas tripeptidyl peptidase 2 (TPP2) efficiently degrades the epitope. Consequently, inhibiting TPP2 substantially boosts PMEL209-217 presentation, suggesting a possible strategy to improve the therapeutic efficacy of the vaccine.
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Affiliation(s)
- Nathalie Vigneron
- Ludwig Institute for Cancer Research, Brussels B-1200, Belgium
- de Duve Institute, University of Louvain, Brussels B-1200, Belgium
- Walloon Excellence in Life Sciences and Biotechnology, Brussels B-1200, Belgium
| | - Violette Ferrari
- Ludwig Institute for Cancer Research, Brussels B-1200, Belgium
- de Duve Institute, University of Louvain, Brussels B-1200, Belgium
- Walloon Excellence in Life Sciences and Biotechnology, Brussels B-1200, Belgium
| | - Benoît J Van den Eynde
- Ludwig Institute for Cancer Research, Brussels B-1200, Belgium;
- de Duve Institute, University of Louvain, Brussels B-1200, Belgium
- Walloon Excellence in Life Sciences and Biotechnology, Brussels B-1200, Belgium
| | - Peter Cresswell
- Department of Immunobiology, Yale University, New Haven, CT 06519; and
- Department of Cell Biology, Yale University, New Haven, CT 06519
| | - Ralf M Leonhardt
- Department of Immunobiology, Yale University, New Haven, CT 06519; and
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18
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Lorente E, Barriga A, García-Arriaza J, Lemonnier FA, Esteban M, López D. Complex antigen presentation pathway for an HLA-A*0201-restricted epitope from Chikungunya 6K protein. PLoS Negl Trop Dis 2017; 11:e0006036. [PMID: 29084215 PMCID: PMC5679651 DOI: 10.1371/journal.pntd.0006036] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 11/09/2017] [Accepted: 10/13/2017] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND The adaptive cytotoxic T lymphocyte (CTL)-mediated immune response is critical for clearance of many viral infections. These CTL recognize naturally processed short viral antigenic peptides bound to human leukocyte antigen (HLA) class I molecules on the surface of infected cells. This specific recognition allows the killing of virus-infected cells. The T cell immune T cell response to Chikungunya virus (CHIKV), a mosquito-borne Alphavirus of the Togaviridae family responsible for severe musculoskeletal disorders, has not been fully defined; nonetheless, the importance of HLA class I-restricted immune response in this virus has been hypothesized. METHODOLOGY/PRINCIPAL FINDINGS By infection of HLA-A*0201-transgenic mice with a recombinant vaccinia virus that encodes the CHIKV structural polyprotein (rVACV-CHIKV), we identified the first human T cell epitopes from CHIKV. These three novel 6K transmembrane protein-derived epitopes are presented by the common HLA class I molecule, HLA-A*0201. One of these epitopes is processed and presented via a complex pathway that involves proteases from different subcellular locations. Specific chemical inhibitors blocked these events in rVACV-CHIKV-infected cells. CONCLUSIONS/SIGNIFICANCE Our data have implications not only for the identification of novel Alphavirus and Togaviridae antiviral CTL responses, but also for analyzing presentation of antigen from viruses of different families and orders that use host proteinases to generate their mature envelope proteins.
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Affiliation(s)
- Elena Lorente
- Unidad de Procesamiento Antigénico, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, Madrid, Spain
| | - Alejandro Barriga
- Unidad de Procesamiento Antigénico, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, Madrid, Spain
| | - Juan García-Arriaza
- Department of Molecular and Cellular Biology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
| | - François A. Lemonnier
- Unité d'Immunité Cellulaire Antivirale, Département d'Immunologie, Institut Pasteur, France
| | - Mariano Esteban
- Department of Molecular and Cellular Biology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
| | - Daniel López
- Unidad de Procesamiento Antigénico, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, Madrid, Spain
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19
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Wei J, Zanker D, Di Carluccio AR, Smelkinson MG, Takeda K, Seedhom MO, Dersh D, Gibbs JS, Yang N, Jadhav A, Chen W, Yewdell JW. Varied Role of Ubiquitylation in Generating MHC Class I Peptide Ligands. THE JOURNAL OF IMMUNOLOGY 2017; 198:3835-3845. [PMID: 28363906 DOI: 10.4049/jimmunol.1602122] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 03/08/2017] [Indexed: 12/11/2022]
Abstract
CD8+ T cell immunosurveillance is based on recognizing oligopeptides presented by MHC class I molecules. Despite decades of study, the importance of protein ubiquitylation to peptide generation remains uncertain. In this study, we examined the ability of MLN7243, a recently described ubiquitin-activating enzyme E1 inhibitor, to block overall cytosolic peptide generation and generation of specific peptides from vaccinia- and influenza A virus-encoded proteins. We show that MLN7243 rapidly inhibits ubiquitylation in a variety of cell lines and can profoundly reduce the generation of cytosolic peptides. Kinetic analysis of specific peptide generation reveals that ubiquitylation of defective ribosomal products is rate limiting in generating class I peptide complexes. More generally, our findings demonstrate that the requirement for ubiquitylation in MHC class I-restricted Ag processing varies with class I allomorph, cell type, source protein, and peptide context. Thus, ubiquitin-dependent and -independent pathways robustly contribute to MHC class I-based immunosurveillance.
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Affiliation(s)
- Jiajie Wei
- Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - Damien Zanker
- T Cell Laboratory, School of Molecular Science, La Trobe University, Bundoora, Victoria 3086, Australia
| | - Anthony R Di Carluccio
- T Cell Laboratory, School of Molecular Science, La Trobe University, Bundoora, Victoria 3086, Australia
| | - Margery G Smelkinson
- Biological Imaging Section, Research Technologies Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - Kazuyo Takeda
- Microscopy and Imaging Core Facility, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD 20993; and
| | - Mina O Seedhom
- Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - Devin Dersh
- Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - James S Gibbs
- Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - Ning Yang
- Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - Ajit Jadhav
- Chemical Genomics Center, National Center for Advancing Translational Sciences, National Institutes of Health, Rockville, MD 20892
| | - Weisan Chen
- T Cell Laboratory, School of Molecular Science, La Trobe University, Bundoora, Victoria 3086, Australia
| | - Jonathan W Yewdell
- Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892;
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20
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Zhao H, Konzer A, Mi J, Chen M, Pettersson U, Lind SB. Posttranscriptional Regulation in Adenovirus Infected Cells. J Proteome Res 2016; 16:872-888. [PMID: 27959563 DOI: 10.1021/acs.jproteome.6b00834] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A deeper understanding of how viruses reprogram their hosts for production of progeny is needed to combat infections. Most knowledge on the regulation of cellular gene expression during adenovirus infection is derived from mRNA studies. Here, we investigated the changes in protein expression during the late phase of adenovirus type 2 (Ad2) infection of the IMR-90 cell line by stable isotope labeling in cell culture with subsequent liquid chromatography-high resolution tandem mass spectrometric analysis. Two biological replicates of samples collected at 24 and 36 h post-infection (hpi) were investigated using swapped labeling. In total, 2648 and 2394 proteins were quantified at 24 and 36 hpi, respectively. Among them, 659 and 645 were deregulated >1.6-fold at the two time points. The protein expression was compared with RNA expression using cDNA sequencing data. The correlation was surprisingly low (r = 0.3), and several examples of posttranscriptional regulation were observed; e.g., proteins related to carbohydrate metabolism were up-regulated at the protein level but unchanged at the RNA level, whereas histone proteins were down-regulated at the protein level but up-regulated at the RNA level. The deregulation of cellular gene expression by adenovirus is mediated at multiple levels and more complex than hitherto believed.
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Affiliation(s)
- Hongxing Zhao
- The Beijer Laboratory, Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Rudbeck Laboratory , 751 85 Uppsala, Sweden
| | - Anne Konzer
- Department of Chemistry-BMC, Science for Life Laboratory, Analytical Chemistry, Box 599, Uppsala University , 751 24 Uppsala, Sweden
| | - Jia Mi
- Department of Chemistry-BMC, Science for Life Laboratory, Analytical Chemistry, Box 599, Uppsala University , 751 24 Uppsala, Sweden
| | - Moashan Chen
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, LaTrobe University , Melbourne, Victoria 3086, Australia
| | - Ulf Pettersson
- The Beijer Laboratory, Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Rudbeck Laboratory , 751 85 Uppsala, Sweden
| | - Sara Bergström Lind
- Department of Chemistry-BMC, Science for Life Laboratory, Analytical Chemistry, Box 599, Uppsala University , 751 24 Uppsala, Sweden
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21
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A multi-step peptidolytic cascade for amino acid recovery in chloroplasts. Nat Chem Biol 2016; 13:15-17. [PMID: 27820795 DOI: 10.1038/nchembio.2227] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Accepted: 08/24/2016] [Indexed: 12/28/2022]
Abstract
Plastids (including chloroplasts) are subcellular sites for a plethora of proteolytic reactions, required in functions ranging from protein biogenesis to quality control. Here we show that peptides generated from pre-protein maturation within chloroplasts of Arabidopsis thaliana are degraded to amino acids by a multi-step peptidolytic cascade consisting of oligopeptidases and aminopeptidases, effectively allowing the recovery of single amino acids within these organelles.
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22
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Design and Synthesis of Activity-Based Probes and Inhibitors for Bleomycin Hydrolase. ACTA ACUST UNITED AC 2015; 22:995-1001. [PMID: 26256478 DOI: 10.1016/j.chembiol.2015.07.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 07/02/2015] [Accepted: 07/09/2015] [Indexed: 11/22/2022]
Abstract
Bleomycin hydrolase (BLMH) is a neutral cysteine aminopeptidase that has been ascribed roles in many physiological and pathological processes, yet its primary biological function remains enigmatic. In this work, we describe the results of screening of a library of fluorogenic substrates to identify non-natural amino acids that are optimally recognized by BLMH. This screen identified several substrates with kcat/KM values that are substantially improved over the previously reported fluorogenic substrates for this enzyme. The substrate sequences were used to design activity-based probes that showed potent labeling of recombinant BLMH as well as endogenously expressed BLMH in cell extracts, and in intact cells. Importantly, we identify potent BLMH inhibitors that are able to fully inhibit endogenous BLMH activity in intact cells. These probes and inhibitors will be valuable new reagents to study BLMH function in cellular and animal models of human diseases where BLMH is likely to be involved.
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23
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Li SW, Lin LP, Chen SH, Fu MY, Wu GP. Purification and biochemical characterization of a puromycin-sensitive aminopeptidase from black carp muscle. Process Biochem 2015. [DOI: 10.1016/j.procbio.2015.04.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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24
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McCarthy MK, Weinberg JB. The immunoproteasome and viral infection: a complex regulator of inflammation. Front Microbiol 2015; 6:21. [PMID: 25688236 PMCID: PMC4310299 DOI: 10.3389/fmicb.2015.00021] [Citation(s) in RCA: 121] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Accepted: 01/08/2015] [Indexed: 11/13/2022] Open
Abstract
During viral infection, proper regulation of immune responses is necessary to ensure successful viral clearance with minimal host tissue damage. Proteasomes play a crucial role in the generation of antigenic peptides for presentation on MHC class I molecules, and thus activation of CD8 T cells, as well as activation of the NF-κB pathway. A specialized type of proteasome called the immunoproteasome is constitutively expressed in hematopoietic cells and induced in non-immune cells during viral infection by interferon signaling. The immunoproteasome regulates CD8 T cell responses to many viral epitopes during infection. Accumulating evidence suggests that the immunoproteasome may also contribute to regulation of proinflammatory cytokine production, activation of the NF-κB pathway, and management of oxidative stress. Many viruses have mechanisms of interfering with immunoproteasome function, including prevention of transcriptional upregulation of immunoproteasome components as well as direct interaction of viral proteins with immunoproteasome subunits. A better understanding of the role of the immunoproteasome in different cell types, tissues, and hosts has the potential to improve vaccine design and facilitate the development of effective treatment strategies for viral infections.
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Affiliation(s)
- Mary K McCarthy
- Department of Microbiology and Immunology, University of Michigan Ann Arbor, MI, USA
| | - Jason B Weinberg
- Department of Microbiology and Immunology, University of Michigan Ann Arbor, MI, USA ; Department of Pediatrics and Communicable Diseases, University of Michigan Ann Arbor, MI, USA
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25
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Vargas-Martínez F, Uvnäs-Moberg K, Petersson M, Olausson HA, Jiménez-Estrada I. Neuropeptides as neuroprotective agents: Oxytocin a forefront developmental player in the mammalian brain. Prog Neurobiol 2014; 123:37-78. [DOI: 10.1016/j.pneurobio.2014.10.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 10/06/2014] [Indexed: 02/07/2023]
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26
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Gamrekelashvili J, Greten TF, Korangy F. Immunogenicity of necrotic cell death. Cell Mol Life Sci 2014; 72:273-83. [PMID: 25274062 DOI: 10.1007/s00018-014-1741-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Revised: 09/03/2014] [Accepted: 09/22/2014] [Indexed: 12/20/2022]
Abstract
The mode of tumor cell death has significant effects on anti-tumor immunity. Although, previously it was thought that cell death is an inert effect, different investigators have clearly shown that dying tumors can attract, activate and mature professional antigen presenting cells and dendritic cells. In addition, others and we have shown that the type of tumor cell death not only controls the presence or absence of specific tumor antigens, but also can result in immunological responses ranging from immunosuppression to anti-tumor immunity. More importantly, it is possible to enhance anti-tumor immunity both in vitro and in vivo by targeting specific molecular mechanisms such as oligopeptidases and the proteasome. These studies not only extend our knowledge on basic immunological questions and the induction of anti-tumor immunity, but also have implications for all types of cancer treatments, in which rapid tumor cell death is induced. This review is a comprehensive summary of cell death and particularly necrosis and the pivotal role it plays in anti-tumor immunity.
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27
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Cascio P. PA28αβ: the enigmatic magic ring of the proteasome? Biomolecules 2014; 4:566-84. [PMID: 24970231 PMCID: PMC4101498 DOI: 10.3390/biom4020566] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Revised: 05/15/2014] [Accepted: 06/08/2014] [Indexed: 11/16/2022] Open
Abstract
PA28αβ is a γ-interferon-induced 11S complex that associates with the ends of the 20S proteasome and stimulates in vitro breakdown of small peptide substrates, but not proteins or ubiquitin-conjugated proteins. In cells, PA28 also exists in larger complexes along with the 19S particle, which allows ATP-dependent degradation of proteins; although in vivo a large fraction of PA28 is present as PA28αβ-20S particles whose exact biological functions are largely unknown. Although several lines of evidence strongly indicate that PA28αβ plays a role in MHC class I antigen presentation, the exact molecular mechanisms of this activity are still poorly understood. Herein, we review current knowledge about the biochemical and biological properties of PA28αβ and discuss recent findings concerning its role in modifying the spectrum of proteasome's peptide products, which are important to better understand the molecular mechanisms and biological consequences of PA28αβ activity.
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Affiliation(s)
- Paolo Cascio
- Department of Veterinary Sciences, University of Turin, Grugliasco 10095, Italy.
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28
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Hsu HT, Janßen L, Lawand M, Kim J, Perez-Arroyo A, Culina S, Gdoura A, Burgevin A, Cumenal D, Fourneau Y, Moser A, Kratzer R, Wong FS, Springer S, van Endert P. Endoplasmic reticulum targeting alters regulation of expression and antigen presentation of proinsulin. THE JOURNAL OF IMMUNOLOGY 2014; 192:4957-66. [PMID: 24778449 DOI: 10.4049/jimmunol.1300631] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Peptide ligands presented by MHC class I (MHC-I) molecules are produced by degradation of cytosolic and nuclear, but also endoplasmic reticulum (ER)-resident, proteins by the proteasome. However, Ag processing of ER proteins remains little characterized. Studying processing and presentation of proinsulin, which plays a pivotal role in autoimmune diabetes, we found that targeting to the ER has profound effects not only on how proinsulin is degraded, but also on regulation of its cellular levels. While proteasome inhibition inhibited degradation and presentation of cytosolic proinsulin, as expected, it reduced the abundance of ER-targeted proinsulin. This targeting and protein modifications modifying protein half-life also had profound effects on MHC-I presentation and proteolytic processing of proinsulin. Thus, presentation of stable luminal forms was inefficient but enhanced by proteasome inhibition, whereas that of unstable luminal forms and of a cytosolic form were more efficient and compromised by proteasome inhibitors. Distinct stability of peptide MHC complexes produced from cytosolic and luminal proinsulin suggests that different proteolytic activities process the two Ag forms. Thus, both structural features and subcellular targeting of Ags can have strong effects on the processing pathways engaged by MHC-I-restricted Ags, and on the efficiency and regulation of their presentation.
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Affiliation(s)
- Hsiang-Ting Hsu
- INSERM, Unité 1151, 75015 Paris, France; Centre National de la Recherche Scientifique, Unité 8253, 75015 Paris, France; Université Paris Descartes, Sorbonne Paris Cité, 75015 Paris, France
| | - Linda Janßen
- Biochemistry and Cell Biology, Molecular Life Science Center, Jacobs University Bremen, 28759 Bremen, Germany; and
| | - Myriam Lawand
- INSERM, Unité 1151, 75015 Paris, France; Centre National de la Recherche Scientifique, Unité 8253, 75015 Paris, France; Université Paris Descartes, Sorbonne Paris Cité, 75015 Paris, France
| | - Jessica Kim
- INSERM, Unité 1151, 75015 Paris, France; Centre National de la Recherche Scientifique, Unité 8253, 75015 Paris, France; Université Paris Descartes, Sorbonne Paris Cité, 75015 Paris, France
| | - Alicia Perez-Arroyo
- INSERM, Unité 1151, 75015 Paris, France; Centre National de la Recherche Scientifique, Unité 8253, 75015 Paris, France; Université Paris Descartes, Sorbonne Paris Cité, 75015 Paris, France
| | - Slobodan Culina
- INSERM, Unité 1151, 75015 Paris, France; Centre National de la Recherche Scientifique, Unité 8253, 75015 Paris, France; Université Paris Descartes, Sorbonne Paris Cité, 75015 Paris, France
| | - Abdel Gdoura
- INSERM, Unité 1151, 75015 Paris, France; Centre National de la Recherche Scientifique, Unité 8253, 75015 Paris, France; Université Paris Descartes, Sorbonne Paris Cité, 75015 Paris, France
| | - Anne Burgevin
- INSERM, Unité 1151, 75015 Paris, France; Centre National de la Recherche Scientifique, Unité 8253, 75015 Paris, France; Université Paris Descartes, Sorbonne Paris Cité, 75015 Paris, France
| | - Delphine Cumenal
- INSERM, Unité 1151, 75015 Paris, France; Centre National de la Recherche Scientifique, Unité 8253, 75015 Paris, France; Université Paris Descartes, Sorbonne Paris Cité, 75015 Paris, France
| | - Yousra Fourneau
- INSERM, Unité 1151, 75015 Paris, France; Centre National de la Recherche Scientifique, Unité 8253, 75015 Paris, France; Université Paris Descartes, Sorbonne Paris Cité, 75015 Paris, France
| | - Anna Moser
- INSERM, Unité 1151, 75015 Paris, France; Centre National de la Recherche Scientifique, Unité 8253, 75015 Paris, France; Université Paris Descartes, Sorbonne Paris Cité, 75015 Paris, France
| | - Roland Kratzer
- INSERM, Unité 1151, 75015 Paris, France; Centre National de la Recherche Scientifique, Unité 8253, 75015 Paris, France; Université Paris Descartes, Sorbonne Paris Cité, 75015 Paris, France
| | - F Susan Wong
- Centre for Endocrine and Diabetes Science, Cardiff University School of Medicine, Cardiff CF14 4XN, United Kingdom
| | - Sebastian Springer
- Biochemistry and Cell Biology, Molecular Life Science Center, Jacobs University Bremen, 28759 Bremen, Germany; and
| | - Peter van Endert
- INSERM, Unité 1151, 75015 Paris, France; Centre National de la Recherche Scientifique, Unité 8253, 75015 Paris, France; Université Paris Descartes, Sorbonne Paris Cité, 75015 Paris, France;
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Insights into the molecular interactions between aminopeptidase and amyloid beta peptide using molecular modeling techniques. Amino Acids 2014; 46:1853-66. [DOI: 10.1007/s00726-014-1740-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Accepted: 03/31/2014] [Indexed: 10/25/2022]
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Hitzerd SM, Verbrugge SE, Ossenkoppele G, Jansen G, Peters GJ. Positioning of aminopeptidase inhibitors in next generation cancer therapy. Amino Acids 2014; 46:793-808. [PMID: 24385243 DOI: 10.1007/s00726-013-1648-0] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Accepted: 12/12/2013] [Indexed: 12/13/2022]
Abstract
Aminopeptidases represent a class of (zinc) metalloenzymes that catalyze the cleavage of amino acids nearby the N-terminus of polypeptides, resulting in hydrolysis of peptide bonds. Aminopeptidases operate downstream of the ubiquitin-proteasome pathway and are implicated in the final step of intracellular protein degradation either by trimming proteasome-generated peptides for antigen presentation or full hydrolysis into free amino acids for recycling in renewed protein synthesis. This review focuses on the function and subcellular location of five key aminopeptidases (aminopeptidase N, leucine aminopeptidase, puromycin-sensitive aminopeptidase, leukotriene A4 hydrolase and endoplasmic reticulum aminopeptidase 1/2) and their association with different diseases, in particular cancer and their current position as target for therapeutic intervention by aminopeptidase inhibitors. Historically, bestatin was the first prototypical aminopeptidase inhibitor that entered the clinic 35 years ago and is still used for the treatment of lung cancer. More recently, new generation aminopeptidase inhibitors became available, including the aminopeptidase inhibitor prodrug tosedostat, which is currently tested in phase II clinical trials for acute myeloid leukemia. Beyond bestatin and tosedostat, medicinal chemistry has emerged with additional series of potential aminopeptidases inhibitors which are still in an early phase of (pre)clinical investigations. The expanded knowledge of the unique mechanism of action of aminopeptidases has revived interest in aminopeptidase inhibitors for drug combination regimens in anti-cancer treatment. In this context, this review will discuss relevant features and mechanisms of action of aminopeptidases and will also elaborate on factors contributing to aminopeptidase inhibitor efficacy and/or loss of efficacy due to drug resistance-related phenomena. Together, a growing body of data point to aminopeptidase inhibitors as attractive tools for combination chemotherapy, hence their implementation may be a step forward in a new era of personalized treatment of cancer patients.
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Affiliation(s)
- Sarina M Hitzerd
- Department of Medical Oncology, VU University Medical Center, Cancer Center Amsterdam, Rm 1.42, De Boelelaan 1117, 1081 HV, Amsterdam, The Netherlands
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31
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Juenemann K, Schipper-Krom S, Wiemhoefer A, Kloss A, Sanz Sanz A, Reits EAJ. Expanded polyglutamine-containing N-terminal huntingtin fragments are entirely degraded by mammalian proteasomes. J Biol Chem 2013; 288:27068-27084. [PMID: 23908352 DOI: 10.1074/jbc.m113.486076] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Huntington disease is a neurodegenerative disorder caused by an expanded polyglutamine (polyQ) repeat within the protein huntingtin (Htt). N-terminal fragments of the mutant Htt (mHtt) proteins containing the polyQ repeat are aggregation-prone and form intracellular inclusion bodies. Improving the clearance of mHtt fragments by intracellular degradation pathways is relevant to obviate toxic mHtt species and subsequent neurodegeneration. Because the proteasomal degradation pathway has been the subject of controversy regarding the processing of expanded polyQ repeats, we examined whether the proteasome can efficiently degrade Htt-exon1 with an expanded polyQ stretch both in neuronal cells and in vitro. Upon targeting mHtt-exon1 to the proteasome, rapid and complete clearance of mHtt-exon1 was observed. Proteasomal degradation of mHtt-exon1 was devoid of polyQ peptides as partial cleavage products by incomplete proteolysis, indicating that mammalian proteasomes are capable of efficiently degrading expanded polyQ sequences without an inhibitory effect on the proteasomal activity.
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Affiliation(s)
- Katrin Juenemann
- Department of Cellbiology and Histology, Academic Medical Center, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands.
| | - Sabine Schipper-Krom
- Department of Cellbiology and Histology, Academic Medical Center, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands
| | - Anne Wiemhoefer
- Department of Cellbiology and Histology, Academic Medical Center, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands
| | - Alexander Kloss
- Institut für Biochemie/CCM, Charité-Universitätsmedizin Berlin, Monbijoustrasse 2, Berlin 10117, Germany
| | - Alicia Sanz Sanz
- Department of Cellbiology and Histology, Academic Medical Center, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands
| | - Eric A J Reits
- Department of Cellbiology and Histology, Academic Medical Center, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands.
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32
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Steinl C, Essl M, Schreiber TD, Geiger K, Prokop L, Stevanović S, Pötz O, Abele H, Wessels JT, Aicher WK, Klein G. Release of matrix metalloproteinase-8 during physiological trafficking and induced mobilization of human hematopoietic stem cells. Stem Cells Dev 2013; 22:1307-18. [PMID: 23259856 PMCID: PMC3629847 DOI: 10.1089/scd.2012.0063] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Accepted: 12/19/2012] [Indexed: 01/11/2023] Open
Abstract
Previous studies indicate that the release of proteases, including the gelatinase matrix metalloproteinase (MMP)-9, from mature granulocytes plays a crucial role in cytokine-induced hematopoietic stem and progenitor cell (HSPC) mobilization. However, studies with MMP-9-deficient mice revealed that HSPC mobilization was normal in these animals, suggesting that additional proteases must be active at clinically relevant cytokine concentrations. In the present study, we provide evidence that the collagenase MMP-8 is involved in stem cell mobilization. A rapid release of MMP-8 from isolated neutrophil granulocytes can be observed during an in vitro culture. During granulocyte colony-stimulating factor-induced HSPC mobilization, highly elevated serum concentrations of MMP-8 were observed on days 4 to 6 of the mobilization regimen, concomitantly with elevated MMP-9 serum levels and higher numbers of circulating CD34(+) cells. Elevated serum concentrations of both proteases were also found in umbilical cord blood serum. In functional assays, adhesion of HSPC to osteoblasts as an essential component of the endosteal stem cell niche is negatively influenced by MMP-8. The chemokine CXCL12, which is critically involved in stem cell trafficking, can be proteolytically processed by MMP-8 treatment. This degradation has a strong inhibitory influence on HSPC migration. Taken together, our data strongly suggest that MMP-8 can be directly involved in hematopoietic stem cell mobilization and trafficking.
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Affiliation(s)
- Carolin Steinl
- Section for Transplantation Immunology and Immunohematology, University Medical Clinic, Center for Medical Research, University of Tübingen, Tübingen, Germany
| | - Mike Essl
- Section for Transplantation Immunology and Immunohematology, University Medical Clinic, Center for Medical Research, University of Tübingen, Tübingen, Germany
| | - Thomas D. Schreiber
- Natural and Medical Sciences Institute, University of Tübingen, Reutlingen, Germany
| | - Konstanze Geiger
- Section for Transplantation Immunology and Immunohematology, University Medical Clinic, Center for Medical Research, University of Tübingen, Tübingen, Germany
| | - Lea Prokop
- Department of Immunology, University of Tübingen, Tübingen, Germany
| | | | - Oliver Pötz
- Natural and Medical Sciences Institute, University of Tübingen, Reutlingen, Germany
| | - Harald Abele
- Department of Gynecology and Obstetrics, University of Tübingen, Tübingen, Germany
| | - Johannes T. Wessels
- Department of Nephrology and Rheumatology, University of Göttingen, Göttingen, Germany
| | - Wilhelm K. Aicher
- Department of Orthopedic Surgery, University Medical Clinic, Center for Medical Research, University of Tübingen, Tübingen, Germany
| | - Gerd Klein
- Section for Transplantation Immunology and Immunohematology, University Medical Clinic, Center for Medical Research, University of Tübingen, Tübingen, Germany
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Tenzer S, Hain T, Berger H, Schild H. Purification of large cytosolic proteases for in vitro assays: 20S and 26S proteasomes. Methods Mol Biol 2013; 960:1-14. [PMID: 23329474 DOI: 10.1007/978-1-62703-218-6_1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Proteasomes are the main cytosolic proteases responsible for generating peptides for antigen processing and presentation in the MHC (major histocompatibility complex) class-I pathway. Purified 20S and 26S proteasomes have been widely used to study both specificity and efficiency of antigen processing. Here, we describe the purification of active human 20S and 26S proteasomes from human erythrocytes by DEAE-ion exchange chromatography, ammonium sulfate precipitation, glycerol density gradient centrifugation, and Superose-6 size exclusion chromatography and their characterization using fluorogenic substrates and specific inhibitors.
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Affiliation(s)
- Stefan Tenzer
- Institute for Immunology, University of Mainz, Mainz, Germany.
| | - Tobias Hain
- Institute for Immunology, University of Mainz, Mainz, Germany
| | - Hendrik Berger
- Institute for Immunology, University of Mainz, Mainz, Germany
| | - Hansjörg Schild
- Institute for Immunology, University of Mainz, Mainz, Germany
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Stargardt A, Reits E. Kinetic studies of cytoplasmic antigen processing and production of MHC class I ligands. Methods Mol Biol 2013; 960:41-51. [PMID: 23329477 DOI: 10.1007/978-1-62703-218-6_4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
MHC class I molecules present peptides that are derived from intracellular proteins degraded by proteasomes. These peptides often require additional trimming by peptidases to fit into the peptide-binding grove of MHC class I. However, most peptides are rapidly recycled by the large heterogeneous pool of peptidases. Here, we describe a technique to quantify peptide degradation both in living cells and in cell lysates, using quenched peptides that contain a quencher and fluorophore. As degradation results in separation of the quencher and fluorophore, fluorescence will increase. This technique enables the examination of changes in peptide length and amino acid sequence on its half-life, and hence its chances to become presented by MHC class I.
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Affiliation(s)
- Anita Stargardt
- Department of Cell Biology & Histology, AMC/University of Amsterdam, Amsterdam, The Netherlands
| | - Eric Reits
- Department of Cell Biology & Histology, AMC/University of Amsterdam, Amsterdam, The Netherlands.
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Abstract
The major histocompatibility complex (MHC) class I restricted pathway of antigen processing allows the presentation of intracellular antigens to cytotoxic T lymphocytes. The proteasome is the main protease in the cytoplasm and the nucleus, which is responsible for the generation of most peptide ligands of MHC-I molecules. Peptides produced by the proteasome can be further trimmed or destroyed by numerous cytosolic or endoplasmic reticulum (ER) lumenal proteases. Small molecule inhibitors are useful tools for probing the role of proteases in MHC class I antigen processing. Here, we describe different methods to test the impact of protease inhibitors in antigen presentation assays.
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Affiliation(s)
- Michael Basler
- Biotechnology Institute Thurgau at the University of Constance, Kreuzlingen, Switzerland. .,Department of Biology, Division of Immunology, University of Konstanz, Konstanz, Germany.
| | - Marcus Groettrup
- Biotechnology Institute Thurgau at the University of Konstanz, Kreuzlingen, Switzerland.,Division of Immunology, Department of Biology, University of Konstanz, Konstanz, Germany
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36
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Census of cytosolic aminopeptidase activity reveals two novel cytosolic aminopeptidases. Med Microbiol Immunol 2012; 201:463-73. [DOI: 10.1007/s00430-012-0266-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Accepted: 08/24/2012] [Indexed: 01/27/2023]
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Cifaldi L, Romania P, Lorenzi S, Locatelli F, Fruci D. Role of endoplasmic reticulum aminopeptidases in health and disease: from infection to cancer. Int J Mol Sci 2012; 13:8338-8352. [PMID: 22942706 PMCID: PMC3430237 DOI: 10.3390/ijms13078338] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2012] [Revised: 06/27/2012] [Accepted: 06/29/2012] [Indexed: 12/22/2022] Open
Abstract
Endoplasmic reticulum (ER) aminopeptidases ERAP1 and ERAP2 (ERAPs) are essential for the maturation of a wide spectrum of proteins involved in various biological processes. In the ER, these enzymes work in concert to trim peptides for presentation on MHC class I molecules. Loss of ERAPs function substantially alters the repertoire of peptides presented by MHC class I molecules, critically affecting recognition of both NK and CD8+ T cells. In addition, these enzymes are involved in the modulation of inflammatory responses by promoting the shedding of several cytokine receptors, and in the regulation of both blood pressure and angiogenesis. Recent genome-wide association studies have identified common variants of ERAP1 and ERAP2 linked to several human diseases, ranging from viral infections to autoimmunity and cancer. More recently, inhibition of ER peptide trimming has been shown to play a key role in stimulating innate and adaptive anti-tumor immune responses, suggesting that inhibition of ERAPs might be exploited for the establishment of innovative therapeutic approaches against cancer. This review summarizes data currently available for ERAP enzymes in ER peptide trimming and in other immunological and non-immunological functions, paying attention to the emerging role played by these enzymes in human diseases.
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Affiliation(s)
- Loredana Cifaldi
- Paediatric Haematology/Oncology Department, Bambino Gesù Children’s Hospital IRCCS, Piazza S. Onofrio 4, Rome 00165, Italy; E-Mails: (L.C.); (P.R.); (S.L.); (F.L.)
| | - Paolo Romania
- Paediatric Haematology/Oncology Department, Bambino Gesù Children’s Hospital IRCCS, Piazza S. Onofrio 4, Rome 00165, Italy; E-Mails: (L.C.); (P.R.); (S.L.); (F.L.)
| | - Silvia Lorenzi
- Paediatric Haematology/Oncology Department, Bambino Gesù Children’s Hospital IRCCS, Piazza S. Onofrio 4, Rome 00165, Italy; E-Mails: (L.C.); (P.R.); (S.L.); (F.L.)
| | - Franco Locatelli
- Paediatric Haematology/Oncology Department, Bambino Gesù Children’s Hospital IRCCS, Piazza S. Onofrio 4, Rome 00165, Italy; E-Mails: (L.C.); (P.R.); (S.L.); (F.L.)
- University of Pavia, Corso Strada Nuova 65, Pavia I-27100, Italy
| | - Doriana Fruci
- Paediatric Haematology/Oncology Department, Bambino Gesù Children’s Hospital IRCCS, Piazza S. Onofrio 4, Rome 00165, Italy; E-Mails: (L.C.); (P.R.); (S.L.); (F.L.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +39-6-68592657; Fax: +39-6-68592904
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38
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Urban S, Textoris-Taube K, Reimann B, Janek K, Dannenberg T, Ebstein F, Seifert C, Zhao F, Kessler JH, Halenius A, Henklein P, Paschke J, Cadel S, Bernhard H, Ossendorp F, Foulon T, Schadendorf D, Paschen A, Seifert U. The efficiency of human cytomegalovirus pp65(495-503) CD8+ T cell epitope generation is determined by the balanced activities of cytosolic and endoplasmic reticulum-resident peptidases. THE JOURNAL OF IMMUNOLOGY 2012; 189:529-38. [PMID: 22706083 DOI: 10.4049/jimmunol.1101886] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Control of human CMV (HCMV) infection depends on the cytotoxic activity of CD8(+) CTLs. The HCMV phosphoprotein (pp)65 is a major CTL target Ag and pp65(495-503) is an immunodominant CTL epitope in infected HLA-A*0201 individuals. As immunodominance is strongly determined by the surface abundance of the specific epitope, we asked for the components of the cellular Ag processing machinery determining the efficacy of pp65(495-503) generation, in particular, for the proteasome, cytosolic peptidases, and endoplasmic reticulum (ER)-resident peptidases. In vitro Ag processing experiments revealed that standard proteasomes and immunoproteasomes generate the minimal 9-mer peptide epitope as well as N-terminal elongated epitope precursors of different lengths. These peptides are largely degraded by the cytosolic peptidases leucine aminopeptidase and tripeptidyl peptidase II, as evidenced by increased pp65(495-503) epitope presentation after leucine aminopeptidase and tripeptidyl peptidase II knockdown. Additionally, with prolyl oligopeptidase and aminopeptidase B we identified two new Ag processing machinery components, which by destroying the pp65(495-503) epitope limit the availability of the specific peptide pool. In contrast to cytosolic peptidases, silencing of ER aminopeptidases 1 and 2 strongly impaired pp65(495-503)-specific T cell activation, indicating the importance of ER aminopeptidases in pp65(495-503) generation. Thus, cytosolic peptidases primarily interfere with the generation of the pp65(495-503) epitope, whereas ER-resident aminopeptidases enhance such generation. As a consequence, our experiments reveal that the combination of cytosolic and ER-resident peptidase activities strongly shape the pool of specific antigenic peptides and thus modulate MHC class I epitope presentation efficiency.
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Affiliation(s)
- Sabrina Urban
- Institut für Biochemie, Charité-Universitätsmedizin, 10117 Berlin, Germany
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39
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Lorente E, García R, Mir C, Barriga A, Lemonnier FA, Ramos M, López D. Role of metalloproteases in vaccinia virus epitope processing for transporter associated with antigen processing (TAP)-independent human leukocyte antigen (HLA)-B7 class I antigen presentation. J Biol Chem 2012; 287:9990-10000. [PMID: 22298786 PMCID: PMC3323003 DOI: 10.1074/jbc.m111.314856] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2011] [Revised: 01/20/2012] [Indexed: 12/27/2022] Open
Abstract
The transporter associated with antigen processing (TAP) translocates the viral proteolytic peptides generated by the proteasome and other proteases in the cytosol to the endoplasmic reticulum lumen. There, they complex with nascent human leukocyte antigen (HLA) class I molecules, which are subsequently recognized by the CD8(+) lymphocyte cellular response. However, individuals with nonfunctional TAP complexes or tumor or infected cells with blocked TAP molecules are able to present HLA class I ligands generated by TAP-independent processing pathways. Herein, using a TAP-independent polyclonal vaccinia virus-polyspecific CD8(+) T cell line, two conserved vaccinia-derived TAP-independent HLA-B*0702 epitopes were identified. The presentation of these epitopes in normal cells occurs via complex antigen-processing pathways involving the proteasome and/or different subsets of metalloproteinases (amino-, carboxy-, and endoproteases), which were blocked in infected cells with specific chemical inhibitors. These data support the hypothesis that the abundant cellular proteolytic systems contribute to the supply of peptides recognized by the antiviral cellular immune response, thereby facilitating immunosurveillance. These data may explain why TAP-deficient individuals live normal life spans without any increased susceptibility to viral infections.
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Affiliation(s)
- Elena Lorente
- Instituto de Salud Carlos III, Centro Nacional de Microbiología, 28220 Majadahonda (Madrid), Spain and
| | - Ruth García
- Instituto de Salud Carlos III, Centro Nacional de Microbiología, 28220 Majadahonda (Madrid), Spain and
| | - Carmen Mir
- Instituto de Salud Carlos III, Centro Nacional de Microbiología, 28220 Majadahonda (Madrid), Spain and
| | - Alejandro Barriga
- Instituto de Salud Carlos III, Centro Nacional de Microbiología, 28220 Majadahonda (Madrid), Spain and
| | - François A Lemonnier
- Unité d'Immunité Cellulaire Antivirale, Département d'Immunologie, Institut Pasteur, Paris Cedex 15, France
| | - Manuel Ramos
- Instituto de Salud Carlos III, Centro Nacional de Microbiología, 28220 Majadahonda (Madrid), Spain and
| | - Daniel López
- Instituto de Salud Carlos III, Centro Nacional de Microbiología, 28220 Majadahonda (Madrid), Spain and.
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40
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Chen X, Wu GP, Cai QF, Liu GM, Osatomi K, Su WJ, Cao MJ. Biochemical characterisation of an aminopeptidase with highest preference for lysine from Japanese flounder skeletal muscle. Food Chem 2012. [DOI: 10.1016/j.foodchem.2011.07.109] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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41
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Hashimoto Y, Matsumoto Y, Noguchi-Yachide T, Nakamura M, Mita Y, Numadate A. Specific Inhibitors of Puromycin-Sensitive Aminopeptidase with a 3-(Halogenated Phenyl)-2,4(1H,3H)-quinazolinedione Skeleton. HETEROCYCLES 2012. [DOI: 10.3987/com-12-s(n)109] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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42
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Towards a systems understanding of MHC class I and MHC class II antigen presentation. Nat Rev Immunol 2011; 11:823-36. [PMID: 22076556 DOI: 10.1038/nri3084] [Citation(s) in RCA: 1207] [Impact Index Per Article: 92.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The molecular details of antigen processing and presentation by MHC class I and class II molecules have been studied extensively for almost three decades. Although the basic principles of these processes were laid out approximately 10 years ago, the recent years have revealed many details and provided new insights into their control and specificity. MHC molecules use various biochemical reactions to achieve successful presentation of antigenic fragments to the immune system. Here we present a timely evaluation of the biology of antigen presentation and a survey of issues that are considered unresolved. The continuing flow of new details into our understanding of the biology of MHC class I and class II antigen presentation builds a system involving several cell biological processes, which is discussed in this Review.
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43
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Towards a systems understanding of MHC class I and MHC class II antigen presentation. Nat Rev Immunol 2011. [PMID: 22076556 DOI: 10.1038/nri3084.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The molecular details of antigen processing and presentation by MHC class I and class II molecules have been studied extensively for almost three decades. Although the basic principles of these processes were laid out approximately 10 years ago, the recent years have revealed many details and provided new insights into their control and specificity. MHC molecules use various biochemical reactions to achieve successful presentation of antigenic fragments to the immune system. Here we present a timely evaluation of the biology of antigen presentation and a survey of issues that are considered unresolved. The continuing flow of new details into our understanding of the biology of MHC class I and class II antigen presentation builds a system involving several cell biological processes, which is discussed in this Review.
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44
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Expression of bleomycin hydrolase in keratinization disorders. Arch Dermatol Res 2011; 304:31-8. [PMID: 22037625 DOI: 10.1007/s00403-011-1180-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2011] [Revised: 09/29/2011] [Accepted: 10/04/2011] [Indexed: 10/15/2022]
Abstract
A neutral cysteine protease, bleomycin hydrolase (BH), is widely expressed in mammalian tissues, with the skin seeming to contain the highest level. Our previous study revealed that BH transcription is modulated both during differentiation and by cytokines. However, BH involvement in keratinization disorder is not well known. In the present study, we performed immunohistochemical studies of BH and other serine/cysteine proteases in human normal skin and lesional skin with keratinization disorders. BH-positive cells were detected in granular layers of orthokeratotic and hyperkeratotic skin diseases, such as erythrokeratoderma and lichen planus. In parakeratotic skin diseases with porokeratosis, pityriasis rubra pilaris and psoriasis, BH staining was decreased in lesional skins compared to that in normal skin. Similar results were obtained for cysteine proteases, caspase-14 and calpain I. On the other hand, cells positive for serine proteases kallikrein 5 and 7 were increased in parakeratotic and inflammatory skin diseases, such as psoriasis. Semi-quantification analysis revealed that BH- and caspase-14-positive staining had higher intensity than those of the other proteases in normal epidermis. As BH is the major citrulline aminopeptidase in normal granular layer, the alternation would have a significant effect on terminal differentiation processes, such as aberrant processing of deiminated peptides. Therefore, BH may play an important role during the late stage of epidermal differentiation.
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Lorente E, García R, López D. Allele-dependent processing pathways generate the endogenous human leukocyte antigen (HLA) class I peptide repertoire in transporters associated with antigen processing (TAP)-deficient cells. J Biol Chem 2011; 286:38054-38059. [PMID: 21914809 DOI: 10.1074/jbc.m111.281808] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The transporters associated with antigen processing (TAP) allow the supply of peptides derived from the cytosol to translocate to the endoplasmic reticulum, where they complex with nascent human leukocyte antigen (HLA) class I molecules. However, infected and tumor cells with TAP molecules blocked or individuals with nonfunctional TAP complexes are able to present HLA class I ligands generated by TAP-independent processing pathways. These peptides are detected by the CD8(+) lymphocyte cellular response. Here, the generation of the overall peptide repertoire associated with four different HLA class I molecules in TAP-deficient cells was studied. Using different protease inhibitors, four different proteolytic specificities were identified. These data demonstrate the different allele-dependent complex processing pathways involved in the generation of the HLA class I peptide repertoire in TAP-deficient cells.
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Affiliation(s)
- Elena Lorente
- Centro Nacional de Microbiología, Instituto de Salud Carlos III, 28220 Majadahonda (Madrid), Spain
| | - Ruth García
- Centro Nacional de Microbiología, Instituto de Salud Carlos III, 28220 Majadahonda (Madrid), Spain
| | - Daniel López
- Centro Nacional de Microbiología, Instituto de Salud Carlos III, 28220 Majadahonda (Madrid), Spain.
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Rockel B, Kopec KO, Lupas AN, Baumeister W. Structure and function of tripeptidyl peptidase II, a giant cytosolic protease. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2011; 1824:237-45. [PMID: 21771670 DOI: 10.1016/j.bbapap.2011.07.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2011] [Revised: 06/29/2011] [Accepted: 07/01/2011] [Indexed: 01/25/2023]
Abstract
Tripeptidyl peptidase II is the largest known eukaryotic peptidase. It has been described as a multi-purpose peptidase, which, in addition to its house-keeping function in intracellular protein degradation, plays a role in several vital cellular processes such as antigen processing, apoptosis, or cell division, and is involved in diseases like muscle wasting, obesity, and in cancer. Biochemical studies and bioinformatics have identified TPPII as a subtilase, but its structure is very unusual: it forms a large homooligomeric complex (6 MDa) with a spindle-like shape. Recently, the high-resolution structure of TPPII homodimers (300 kDa) was solved and a hybrid structure of the holocomplex built of 20 dimers was obtained by docking it into the EM-density. Here, we summarize our current knowledge about TPPII with a focus on structural aspects. This article is part of a Special Issue entitled: Proteolysis 50 years after the discovery of lysosome.
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Affiliation(s)
- Beate Rockel
- Department of Molecular Structural Biology, Max Planck Institute of Biochemistry, Martinsried, Germany.
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Seliger B, Dressler SP, Massa C, Recktenwald CV, Altenberend F, Bukur J, Marincola FM, Wang E, Stevanovic S, Lichtenfels R. Identification and characterization of human leukocyte antigen class I ligands in renal cell carcinoma cells. Proteomics 2011; 11:2528-41. [PMID: 21595034 DOI: 10.1002/pmic.201000486] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2010] [Revised: 03/07/2011] [Accepted: 03/28/2011] [Indexed: 02/01/2023]
Abstract
The presentation of tumor antigen-derived peptides by human leukocyte antigen (HLA) class I surface antigens on tumor cells is a key prerequisite to trigger effective T-cell responses in cancer patients. Multiple complementary strategies like cDNA and serological expression cloning, reverse immunology and different 'ome'-based methods have been employed to identify potential T-cell targets. This report focuses on a ligandomic profiling approach leading to the identification of 49 naturally processed HLA class I peptide ligands presented on the cell surface of renal cell carcinoma (RCC) cells. The source proteins of the defined HLA ligands are classified according to their biological function and subcellular localization. Previously established cDNA microarray data of paired tissue specimen of RCC and renal epithelium assessed the transcriptional regulation for 28 source proteins. In addition, HLA-A2-restricted, peptide-specific T cells directed against a HLA ligand derived from sulfiredoxin-1 (SRXN1) were generated, which were able to recognize and lyse ligand-presenting target cells in a HLA class I-restricted manner. Furthermore, tumor-infiltrating T cells isolated from a RCC patient were also able to kill SRXN1 expressing tumor cells. Thus, this experimental strategy might be suited to define potential candidate biomarkers and novel targets for T-cell-based immunotherapies of this disease.
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Affiliation(s)
- Barbara Seliger
- Institute of Medical Immunology, Martin-Luther University Halle-Wittenberg, Halle, Germany.
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Vigneron N, Van den Eynde BJ. Insights into the processing of MHC class I ligands gained from the study of human tumor epitopes. Cell Mol Life Sci 2011; 68:1503-20. [PMID: 21387143 PMCID: PMC11114561 DOI: 10.1007/s00018-011-0658-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2011] [Revised: 02/17/2011] [Accepted: 02/18/2011] [Indexed: 12/29/2022]
Abstract
The molecular definition of tumor antigens recognized by cytolytic T lymphocytes (CTL) started in the late 1980s, at a time when the MHC class I antigen processing field was in its infancy. Born together, these two fields of science evolved together and provided each other with critical insights. Over the years, stimulated by the potential interest of tumor antigens for cancer immunotherapy, scientists have identified and characterized numerous antigens recognized by CTL on human tumors. These studies have provided a wealth of information relevant to the mode of production of antigenic peptides presented by MHC class I molecules. A number of tumor antigenic peptides were found to result from unusual mechanisms occurring at the level of transcription, translation or processing. Although many of these mechanisms occur in the cell at very low level, they are relevant to the immune system as they determine the killing of tumor cells by CTL, which are sensitive to low levels of peptide/MHC complexes. Moreover, these unusual mechanisms were found to occur not only in tumor cells but also in normal cells. Thereby, the study of tumor antigens has illuminated many aspects of MHC class I processing. We review here those insights into the MHC I antigen processing pathway that result from the characterization of human tumor antigens recognized by CTL.
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Affiliation(s)
- Nathalie Vigneron
- Ludwig Institute for Cancer Research, Brussels Branch and de Duve Institute, Université Catholique de Louvain, Avenue Hippocrate 74, UCL 7459, 1200 Brussels, Belgium
| | - Benoît J. Van den Eynde
- Ludwig Institute for Cancer Research, Brussels Branch and de Duve Institute, Université Catholique de Louvain, Avenue Hippocrate 74, UCL 7459, 1200 Brussels, Belgium
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49
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Del Val M, Iborra S, Ramos M, Lázaro S. Generation of MHC class I ligands in the secretory and vesicular pathways. Cell Mol Life Sci 2011; 68:1543-52. [PMID: 21387141 PMCID: PMC11114776 DOI: 10.1007/s00018-011-0661-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2011] [Revised: 02/17/2011] [Accepted: 02/18/2011] [Indexed: 12/13/2022]
Abstract
CD8(+) T lymphocytes screen the surface of all cells in the body to detect pathogen infection or oncogenic transformation. They recognize peptides derived from cellular proteins displayed at the plasma membrane by major histocompatibility complex (MHC) class I molecules. Peptides are mostly by-products of cytosolic proteolytic enzymes. Peptidic ligands of MHC class I molecules are also generated in the secretory and vesicular pathways. Features of protein substrates, of proteases and of available MHC class I molecules for loading peptides in these compartments shape a singular collection of ligands that also contain different, longer, and lower affinity peptides than ligands produced in the cytosol. Especially in individuals who lack the transporters associated with antigen processing, TAP, and in infected and tumor cells where TAP is blocked, which thus have no supply of peptides derived from the cytosol, MHC class I ligands generated in the secretory and vesicular pathways contribute to shaping the CD8(+) T lymphocyte response.
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Affiliation(s)
- Margarita Del Val
- Unidad de Inmunología Viral, Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Nicolás Cabrera 1, Universidad Autónoma de Madrid, Campus Cantoblanco, 28049 Madrid, Spain,
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Mester G, Hoffmann V, Stevanović S. Insights into MHC class I antigen processing gained from large-scale analysis of class I ligands. Cell Mol Life Sci 2011; 68:1521-32. [PMID: 21387142 PMCID: PMC11114492 DOI: 10.1007/s00018-011-0659-9] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2011] [Revised: 02/17/2011] [Accepted: 02/18/2011] [Indexed: 01/06/2023]
Abstract
Short peptides derived from intracellular proteins and presented on MHC class I molecules on the cell surface serve as a showcase for the immune system to detect pathogenic or malignant alterations inside the cell, and the sequencing and analysis of the presented peptide pool has received considerable attention over the last two decades. In this review, we give a comprehensive presentation of the methods employed for the large-scale qualitative and quantitative analysis of the MHC class I ligandome. Furthermore, we focus on insights gained into the underlying processing pathway, especially involving the roles of the proteasome, the TAP complex, and the peptide specificities and motifs of MHC molecules. The identification of post-translational modifications in MHC ligands and their implications for processing are also considered. Finally, we review the correlations of the ligandome to the proteome and the transcriptome.
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Affiliation(s)
- Gabor Mester
- Institute for Cell Biology, Department of Immunology, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Vanessa Hoffmann
- Institute for Cell Biology, Department of Immunology, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Stefan Stevanović
- Institute for Cell Biology, Department of Immunology, Eberhard Karls University Tübingen, Tübingen, Germany
- Abteilung für Immunologie, Eberhard-Karls-Universität Tübingen, Auf der Morgenstelle 15, 72076 Tübingen, Germany
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