1
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Sarri CA, Papadopoulos GE, Mamuris Z. West Nile virus-associated HLA-DRB1 alleles in the Greek population: A structural perspective. Microbiol Immunol 2023; 67:154-159. [PMID: 36578106 DOI: 10.1111/1348-0421.13048] [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: 11/11/2021] [Revised: 07/10/2022] [Accepted: 12/19/2022] [Indexed: 12/30/2022]
Abstract
The HLA system plays a significant role via the regulation of the immune system and contributes to the progression and protection of many diseases. In our previous study, several HLA-DRB1 alleles were found to have a susceptible or protective role toward infection and neuroinvasion of West Nile Virus (WNV) in the Greek population. As expected, the majority of polymorphic positions are located in the peptide-binding region of the molecule. In the present work, the structure of these alleles was studied in silico, to examine the effect of polymorphism on the conformation of DRB1 proteins, with the aspect of WNV association. More specifically, molecular dynamics simulations were used for structural prediction of 23 available alleles. These modeled alleles were evaluated using root-mean-square deviation (RMSD) and root-mean-square fluctuation analysis. Low RMSD values indicate that different alleles have similar structures. Furthermore, low fluctuation was observed in the peptide-binding region between alleles with the higher and the lowest RMSD values. These findings indicate that probably variable residues do not affect the behavior of DRB1 alleles in WNV disease, by causing structural differences between them.
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Affiliation(s)
- Constantina A Sarri
- Department of Biochemistry and Biotechnology, University of Thessaly, Larissa, Greece
| | | | - Zissis Mamuris
- Department of Biochemistry and Biotechnology, University of Thessaly, Larissa, Greece
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2
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Wakui M, Uwamino Y, Yatabe Y, Nakagawa T, Sakai A, Kurafuji T, Shibata A, Tomita Y, Noguchi M, Tanabe A, Arai T, Ohno A, Yokota H, Uno S, Yamasawa W, Sato Y, Ikeda M, Yoshimura A, Hasegawa N, Saya H, Murata M. Assessing anti-SARS-CoV-2 cellular immunity in 571 vaccines by using an IFN-γ release assay. Eur J Immunol 2022; 52:1961-1971. [PMID: 36250411 PMCID: PMC9874394 DOI: 10.1002/eji.202249794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 09/23/2022] [Accepted: 10/12/2022] [Indexed: 01/27/2023]
Abstract
Memory T cell responses have been analyzed only in small cohorts of COVID-19 vaccines. Herein, we aimed to assess anti-SARS-CoV-2 cellular immunity in a large cohort using QuantiFERON assays, which are IFN-γ release assays (IGRAs) based on short-term whole blood culture. The study included 571 individuals receiving the viral spike (S) protein-expressing BNT162b2 mRNA vaccine. QuantiFERON assays revealed antigen-specific IFN-γ production in most individuals 8 weeks after the second dose. Simultaneous flow cytometric assays to detect T cells expressing activation-induced markers (AIMs) performed for 28 randomly selected individuals provided data correlating with the QuantiFERON data. Simultaneous IFN-γ enzyme-linked immunospot and AIM assays for another subset of 31 individuals, based on short-term peripheral blood mononuclear cell culture, also indicated a correlation between IFN-γ production and AIM positivity. These observations indicated the acquisition of T cell memory responses and supported the usability of IGRAs to assess cellular immunity. The QuantiFERON results were weakly correlated with serum IgG titers against the receptor-binding domain of the S protein and were associated with pre-vaccination infection and adverse reactions after the second dose. The present study revealed cellular immunity after COVID-19 vaccination, providing insights into the effects and adverse reactions of vaccination.
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Affiliation(s)
- Masatoshi Wakui
- Department of Laboratory MedicineKeio University School of MedicineShinjuku‐kuTokyoJapan
| | - Yoshifumi Uwamino
- Department of Laboratory MedicineKeio University School of MedicineShinjuku‐kuTokyoJapan,Department of Infectious DiseasesKeio University School of MedicineShinjuku‐kuTokyoJapan
| | - Yoko Yatabe
- Clinical LaboratoryKeio University HospitalShinjuku‐kuTokyoJapan
| | | | - Akiko Sakai
- Clinical LaboratoryKeio University HospitalShinjuku‐kuTokyoJapan
| | | | - Ayako Shibata
- Department of Laboratory MedicineKeio University School of MedicineShinjuku‐kuTokyoJapan
| | - Yukari Tomita
- Department of Laboratory MedicineKeio University School of MedicineShinjuku‐kuTokyoJapan
| | - Masayo Noguchi
- Clinical LaboratoryKeio University HospitalShinjuku‐kuTokyoJapan
| | - Akiko Tanabe
- Clinical LaboratoryKeio University HospitalShinjuku‐kuTokyoJapan
| | - Tomoko Arai
- Clinical LaboratoryKeio University HospitalShinjuku‐kuTokyoJapan
| | - Akemi Ohno
- Clinical LaboratoryKeio University HospitalShinjuku‐kuTokyoJapan
| | - Hiromitsu Yokota
- Clinical LaboratoryKeio University HospitalShinjuku‐kuTokyoJapan
| | - Shunsuke Uno
- Department of Infectious DiseasesKeio University School of MedicineShinjuku‐kuTokyoJapan
| | - Wakako Yamasawa
- Department of Laboratory MedicineKeio University School of MedicineShinjuku‐kuTokyoJapan
| | - Yasunori Sato
- Department of Epidemiology and Preventive MedicineKeio University School of MedicineShinjuku‐kuTokyoJapan
| | - Mari Ikeda
- Department of Microbiology and ImmunologyKeio University School of MedicineShinjuku‐kuTokyoJapan
| | - Akihiko Yoshimura
- Department of Microbiology and ImmunologyKeio University School of MedicineShinjuku‐kuTokyoJapan
| | - Naoki Hasegawa
- Department of Infectious DiseasesKeio University School of MedicineShinjuku‐kuTokyoJapan
| | - Hideyuki Saya
- Division of Gene RegulationInstitute for Advanced Medical ResearchKeio University School of MedicineShinjuku‐kuTokyoJapan
| | - Mitsuru Murata
- Department of Laboratory MedicineKeio University School of MedicineShinjuku‐kuTokyoJapan
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3
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Jiang S, Wu S, Zhao G, He Y, Guo X, Zhang Z, Hou J, Ding Y, Cheng A, Wang B. Identification of a promiscuous conserved CTL epitope within the SARS-CoV-2 spike protein. Emerg Microbes Infect 2022; 11:730-740. [PMID: 35171086 PMCID: PMC8890520 DOI: 10.1080/22221751.2022.2043727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The COVID-19 disease caused by infection with SARS-CoV-2 and its variants is devastating to the global public health and economy. To date, over a hundred COVID-19 vaccines are known to be under development, and the few that have been approved to fight the disease are using the spike protein as the primary target antigen. Although virus-neutralizing epitopes are mainly located within the RBD of the spike protein, the presence of T cell epitopes, particularly the CTL epitopes that are likely to be needed for killing infected cells, has received comparatively little attention. This study predicted several potential T cell epitopes with web-based analytic tools and narrowed them down from several potential MHC-I and MHC-II epitopes by ELIspot and cytolytic assays to a conserved MHC-I epitope. The epitope is highly conserved in current viral variants and compatible with a presentation by most HLA alleles worldwide. In conclusion, we identified a CTL epitope suitable for evaluating the CD8+ T cell-mediated cellular response and potentially for addition into future COVID-19 vaccine candidates to maximize CTL responses against SARS-CoV-2.
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Affiliation(s)
- Sheng Jiang
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), School of Basic Medical Sciences, Shanghai Medical College(SHMC), Fudan University.,National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China
| | - Shuting Wu
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), School of Basic Medical Sciences, Shanghai Medical College(SHMC), Fudan University
| | - Gan Zhao
- Advaccine Biopharmaceutics (Suzhou) Co. LTD, Jiangsu Province, China. dColby College, Waterville, Maine, USA
| | - Yue He
- Advaccine Biopharmaceutics (Suzhou) Co. LTD, Jiangsu Province, China. dColby College, Waterville, Maine, USA
| | | | - Zhiyu Zhang
- Advaccine Biopharmaceutics (Suzhou) Co. LTD, Jiangsu Province, China. dColby College, Waterville, Maine, USA
| | - Jiawang Hou
- Advaccine Biopharmaceutics (Suzhou) Co. LTD, Jiangsu Province, China. dColby College, Waterville, Maine, USA
| | - Yuan Ding
- Advaccine Biopharmaceutics (Suzhou) Co. LTD, Jiangsu Province, China. dColby College, Waterville, Maine, USA
| | - Alex Cheng
- Advaccine Biopharmaceutics (Suzhou) Co. LTD, Jiangsu Province, China. dColby College, Waterville, Maine, USA
| | - Bin Wang
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), School of Basic Medical Sciences, Shanghai Medical College(SHMC), Fudan University.,National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China.,Advaccine Biopharmaceutics (Suzhou) Co. LTD, Jiangsu Province, China. dColby College, Waterville, Maine, USA
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4
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Lorente E, Palomo C, Barnea E, Mir C, del Val M, Admon A, López D. Natural Spleen Cell Ligandome in Transporter Antigen Processing-Deficient Mice. J Proteome Res 2019; 18:3512-3520. [DOI: 10.1021/acs.jproteome.9b00416] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Elena Lorente
- Unidad de Presentación y Regulación Inmunes, Instituto de Salud Carlos III, 28220 Majadahonda (Madrid), Spain
| | - Concepción Palomo
- Unidad de Presentación y Regulación Inmunes, Instituto de Salud Carlos III, 28220 Majadahonda (Madrid), Spain
| | - Eilon Barnea
- Department of Biology, Technion-Israel Institute of Technology, 32000 Haifa, Israel
| | - Carmen Mir
- Unidad de Presentación y Regulación Inmunes, Instituto de Salud Carlos III, 28220 Majadahonda (Madrid), Spain
| | - Margarita del Val
- Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas (CSIC), 28049 Madrid, Spain
| | - Arie Admon
- Department of Biology, Technion-Israel Institute of Technology, 32000 Haifa, Israel
| | - Daniel López
- Unidad de Presentación y Regulación Inmunes, Instituto de Salud Carlos III, 28220 Majadahonda (Madrid), Spain
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5
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Nirwati H, Donato CM, Ikram A, Aman AT, Wibawa T, Kirkwood CD, Soenarto Y, Pan Q, Hakim MS. Phylogenetic and immunoinformatic analysis of VP4, VP7, and NSP4 genes of rotavirus strains circulating in children with acute gastroenteritis in Indonesia. J Med Virol 2019; 91:1776-1787. [PMID: 31243786 DOI: 10.1002/jmv.25527] [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] [Received: 04/27/2019] [Accepted: 06/20/2019] [Indexed: 02/02/2023]
Abstract
Rotavirus is a major cause of diarrhea in Indonesian children. However, rotavirus vaccines have not been introduced in the national immunization program of Indonesia. Understanding the genetic diversity and conserved antigenic regions of circulating strains are therefore essential to assess the potential efficacy of rotavirus vaccines. We collected fecal samples from hospitalized children less than 5 years of age with acute diarrhea. Rotavirus genotyping was performed by reverse transcriptase polymerase chain reaction, followed by sequencing of the VP4, VP7, and NSP4 genes of representative strains. Phylogenetic analysis was performed to investigate their relationship with globally circulating strains. Conservational analysis, immunoinformatics, and epitope mapping in comparison to vaccine strains were also performed. The sequence analyses showed that differences of multiple amino acid residues existed between the VP4, VP7, and NSP4 antigenic regions of the vaccine strains and the Indonesian isolates. However, many predicted conserved epitopes with higher antigenicity were observed in the vaccine and Indonesian strains, conferring the importance of these epitopes. The identified epitopes showed a higher potential of rotavirus vaccine to be employed in Indonesia. It could also be helpful to inform the design of a peptide vaccine based on the conserved regions and epitopes in the viral proteins.
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Affiliation(s)
- Hera Nirwati
- Department of Microbiology, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Celeste M Donato
- Department of Microbiology, Biomedicine Discovery Institute, Monash University, Melbourne, Victoria, Australia.,Enteric Diseases Group, Murdoch Children's Research Institute, Melbourne, Victoria, Australia
| | - Aqsa Ikram
- Postgraduate School Molecular Medicine, Erasmus MC-University Medical Center, Rotterdam, The Netherlands.,Department of Industrial Biotechnology, Atta-Ur-Rahman School of Applied Biosciences (ASAB), National University of Science and Technology (NUST), Islamabad, Pakistan
| | - Abu T Aman
- Department of Microbiology, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Tri Wibawa
- Department of Microbiology, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Carl D Kirkwood
- Enteric Diseases Group, Murdoch Children's Research Institute, Melbourne, Victoria, Australia
| | - Yati Soenarto
- Department of Child Health, Faculty of Medicine, Public Health and Nursing, Dr. Sardjito Hospital, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Qiuwei Pan
- Postgraduate School Molecular Medicine, Erasmus MC-University Medical Center, Rotterdam, The Netherlands
| | - Mohamad S Hakim
- Department of Microbiology, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta, Indonesia.,Postgraduate School Molecular Medicine, Erasmus MC-University Medical Center, Rotterdam, The Netherlands
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6
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Computational characterization of the peptidome in transporter associated with antigen processing (TAP)-deficient cells. PLoS One 2019; 14:e0210583. [PMID: 30645615 PMCID: PMC6333353 DOI: 10.1371/journal.pone.0210583] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Accepted: 12/26/2018] [Indexed: 12/24/2022] Open
Abstract
The transporter associated with antigen processing (TAP) is a key element of the major histocompatibility complex (MHC) class I antigen processing and presentation pathway. Nonfunctional TAP complexes impair the translocation of cytosol-derived proteolytic peptides to the endoplasmic reticulum lumen. This drastic reduction in the available peptide repertoire leads to a significant decrease in MHC class I cell surface expression. Using mass spectrometry, different studies have analyzed the cellular MHC class I ligandome from TAP-deficient cells, but the analysis of the parental proteins, the source of these ligands, still deserves an in-depth analysis. In the present report, several bioinformatics protocols were applied to investigate the nature of parental proteins for the previously identified TAP-independent MHC class I ligands. Antigen processing in TAP-deficient cells mainly focused on small, abundant or highly integral transmembrane proteins of the cellular proteome. This process involved abundant proteins of the central RNA metabolism. In addition, TAP-independent ligands were preferentially cleaved from the N- and C-terminal ends with respect to the central regions of the parental proteins. The abundance of glycine, proline and aromatic residues in the C-terminal sequences from TAP-independently processed proteins allows the accessibility and specificity required for the proteolytic activities that generates the TAP-independent ligandome. This limited proteolytic activity towards a set of preferred proteins in a TAP-negative environment would therefore suffice to promote the survival of TAP-deficient individuals.
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7
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Sarri CA, Papadopoulos GE, Papa A, Tsakris A, Pervanidou D, Baka A, Politis C, Billinis C, Hadjichristodoulou C, Mamuris Z. Amino acid signatures in the HLA class II peptide-binding region associated with protection/susceptibility to the severe West Nile Virus disease. PLoS One 2018; 13:e0205557. [PMID: 30379846 PMCID: PMC6209194 DOI: 10.1371/journal.pone.0205557] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 09/27/2018] [Indexed: 12/23/2022] Open
Abstract
The MHC class II region in humans is highly polymorphic. Each MHC molecule is formed by an α and a β chain, produced by different genes, creating an antigen-binding groove. In the groove there are several pockets into which antigens anchor and fit. The affinity of this fitting determines the recognition specificity of a given peptide. Here, based on our previous results about the association of MHC class II with the WNV disease, we examined the role of the binding pockets of HLA-DPA1, -DQA1 and-DRB1 in the severe form of the disease. In HLA-DQA1, variants in all pockets 1, 6 and 9 were found to be associated with either protection and/or susceptibility to neuroinvasion caused by WNV. Similarly, pockets 7, 9 and 10 in HLA-DRB1 were associated with severe disease. Protein modeling of these molecules revealed structural and functional differences among alleles with opposite roles concerning the development of the disease. Different amino acids in positions α52 and α66 (HLA-DQA1) significantly influenced the peptide binding while DYWLR/EFA combination (HLA-DRB1) was associated with neuronal damage. Further studies could help us understand the selectivity of pocket variants in order to create suitable peptides for an effective response.
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Affiliation(s)
- Constantina A. Sarri
- Department of Biochemistry and Biotechnology, University of Thessaly, Larissa, Greece
| | | | - Anna Papa
- 1st Microbiological Laboratory, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Athanasios Tsakris
- Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Danai Pervanidou
- Hellenic Centre for Disease Control and Prevention (HCDCP), Athens, Greece
| | - Agoritsa Baka
- Hellenic Centre for Disease Control and Prevention (HCDCP), Athens, Greece
| | | | | | | | - Zissis Mamuris
- Department of Biochemistry and Biotechnology, University of Thessaly, Larissa, Greece
- * E-mail:
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8
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Nikoopour E, Krougly O, Lee-Chan E, Haeryfar SM, Singh B. Detection of vasostatin-1-specific CD8(+) T cells in non-obese diabetic mice that contribute to diabetes pathogenesis. Clin Exp Immunol 2016; 185:292-300. [PMID: 27185276 DOI: 10.1111/cei.12811] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Revised: 05/04/2016] [Accepted: 05/12/2016] [Indexed: 11/29/2022] Open
Abstract
Chromogranin A (ChgA) is an antigenic target of pathogenic CD4(+) T cells in a non-obese diabetic (NOD) mouse model of type 1 diabetes (T1D). Vasostatin-1 is a naturally processed fragment of ChgA. We have now identified a novel H2-K(d) -restricted epitope of vasostatin-1, ChgA 36-44, which elicits CD8(+) T cell responses in NOD mice. By using ChgA 36-44/K(d) tetramers we have determined the frequency of vasostatin-1-specific CD8(+) T cells in pancreatic islets and draining lymph nodes of NOD mice. We also demonstrate that vasostatin-1-specific CD4(+) and CD8(+) T cells constitute a significant fraction of islet-infiltrating T cells in diabetic NOD mice. Adoptive transfer of T cells from ChgA 36-44 peptide-primed NOD mice into NOD/severe combined immunodeficiency (SCID) mice led to T1D development. These findings indicate that vasostatin-1-specific CD8(+) T cells contribute to the pathogenesis of type 1 diabetes in NOD mice.
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Affiliation(s)
- E Nikoopour
- Department of Microbiology and Immunology, Centre for Human Immunology
| | - O Krougly
- Department of Microbiology and Immunology, Centre for Human Immunology
| | - E Lee-Chan
- Department of Microbiology and Immunology, Centre for Human Immunology
| | - S M Haeryfar
- Department of Microbiology and Immunology, Centre for Human Immunology
| | - B Singh
- Department of Microbiology and Immunology, Centre for Human Immunology.,Robarts Research Institute, University of Western Ontario, London, ON, Canada
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9
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Lorente E, Infantes S, Barnea E, Beer I, Barriga A, García-Medel N, Lasala F, Jiménez M, Admon A, López D. Diversity of natural self-derived ligands presented by different HLA class I molecules in transporter antigen processing-deficient cells. PLoS One 2013; 8:e59118. [PMID: 23555621 PMCID: PMC3608615 DOI: 10.1371/journal.pone.0059118] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Accepted: 02/11/2013] [Indexed: 12/16/2022] Open
Abstract
The transporter associated with antigen processing (TAP) translocates the cytosol-derived proteolytic peptides to the endoplasmic reticulum lumen where they complex with nascent human leukocyte antigen (HLA) class I molecules. Non-functional TAP complexes and viral or tumoral blocking of these transporters leads to reduced HLA class I surface expression and a drastic change in the available peptide repertoire. Using mass spectrometry to analyze complex human leukocyte antigen HLA-bound peptide pools isolated from large numbers of TAP-deficient cells, we identified 334 TAP-independent ligands naturally presented by four different HLA-A, -B, and -C class I molecules with very different TAP dependency from the same cell line. The repertoire of TAP-independent peptides examined favored increased peptide lengths and a lack of strict binding motifs for all four HLA class I molecules studied. The TAP-independent peptidome arose from 182 parental proteins, the majority of which yielded one HLA ligand. In contrast, TAP-independent antigen processing of very few cellular proteins generated multiple HLA ligands. Comparison between TAP-independent peptidome and proteome of several subcellular locations suggests that the secretory vesicle-like organelles could be a relevant source of parental proteins for TAP-independent HLA ligands. Finally, a predominant endoproteolytic peptidase specificity for Arg/Lys or Leu/Phe residues in the P(1) position of the scissile bond was found for the TAP-independent ligands. These data draw a new and intricate picture of TAP-independent pathways.
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Affiliation(s)
- Elena Lorente
- Unidad de Procesamiento Antigénico-Inmunología Viral, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Madrid, Spain
| | - Susana Infantes
- Unidad de Procesamiento Antigénico-Inmunología Viral, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Madrid, Spain
| | - Eilon Barnea
- Department of Biology, Technion-Israel Institute of Technology, Haifa, Israel
| | - Ilan Beer
- Department of Biology, Technion-Israel Institute of Technology, Haifa, Israel
| | - Alejandro Barriga
- Unidad de Procesamiento Antigénico-Inmunología Viral, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Madrid, Spain
| | - Noel García-Medel
- Centro de Biología Molecular Severo Ochoa, CSIC/Universidad Autónoma de Madrid, Madrid, Spain
| | - Fátima Lasala
- Unidad de Proteómica, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Madrid, Spain
| | - Mercedes Jiménez
- Unidad de Proteómica, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Madrid, Spain
| | - Arie Admon
- Department of Biology, Technion-Israel Institute of Technology, Haifa, Israel
| | - Daniel López
- Unidad de Procesamiento Antigénico-Inmunología Viral, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Madrid, Spain
- * E-mail:
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10
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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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11
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Simone LC, Tuli A, Simone PD, Wang X, Solheim JC. Analysis of major histocompatibility complex class I folding: novel insights into intermediate forms. ACTA ACUST UNITED AC 2012; 79:249-62. [PMID: 22329842 DOI: 10.1111/j.1399-0039.2012.01849.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Folding around a peptide ligand is integral to the antigen presentation function of major histocompatibility complex (MHC) class I molecules. Several lines of evidence indicate that the broadly cross-reactive 34-1-2 antibody is sensitive to folding of the MHC class I peptide-binding groove. Here, we show that peptide-loading complex proteins associated with the murine MHC class I molecule K(d) are found primarily in association with the 34-1-2(+) form. This led us to hypothesize that the 34-1-2 antibody may recognize intermediately, as well as fully, folded MHC class I molecules. To further characterize the form(s) of MHC class I molecules recognized by 34-1-2, we took advantage of its cross-reactivity with L(d) . Recognition of the open and folded forms of L(d) by the 64-3-7 and 30-5-7 antibodies, respectively, has been extensively characterized, providing us with parameters against which to compare 34-1-2 reactivity. We found that the 34-1-2(+) L(d) molecules displayed characteristics indicative of incomplete folding, including increased tapasin association, endoplasmic reticulum retention, and instability at the cell surface. Moreover, we show that an L(d) -specific peptide induced folding of the 34-1-2(+) L(d) intermediate. Altogether, these results yield novel insights into the nature of MHC class I molecules recognized by the 34-1-2 antibody.
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Affiliation(s)
- L C Simone
- Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE 68198-6805, USA
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12
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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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13
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TAP-independent human histocompatibility complex-Cw1 antigen processing of an HIV envelope protein conserved peptide. AIDS 2011; 25:265-9. [PMID: 21099670 DOI: 10.1097/qad.0b013e328340fe3c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Individuals with nonfunctional transporters associated with antigen processing (TAP) complexes are not particularly susceptible to viral infections or neoplasms. Therefore, their immune system must be reasonably efficient, and the present, though reduced, cytolytic CD8 αβ T subpopulation specific for TAP-independent antigens may be sufficient to establish an immune defense protecting against viral infections in these individuals. The objective of the present study was to identify TAP-independent ligands from HIV gp160 protein. An analysis and comparison of complex human histocompatibility complex (HLA)-bound peptide pools isolated from large quantities of healthy or HIV gp160-expressing human cells was performed using mass spectrometry and bioinformatics tools. A conserved TAP-independent HLA peptide ligand endogenously processed and presented in infected human cells was identified. This ligand originates from the envelope protein bound to the HLA-Cw1 class I molecule with high affinity. It was concluded that HLA class I peptides derived from a large fraction of the N-terminal HIV envelope protein could be presented even in the absence of the TAP complex.
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Oliveira CC, van Veelen PA, Querido B, de Ru A, Sluijter M, Laban S, Drijfhout JW, van der Burg SH, Offringa R, van Hall T. The nonpolymorphic MHC Qa-1b mediates CD8+ T cell surveillance of antigen-processing defects. ACTA ACUST UNITED AC 2009; 207:207-21. [PMID: 20038604 PMCID: PMC2812552 DOI: 10.1084/jem.20091429] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The nonclassical major histocompatibility complex (MHC) Qa-1b accommodates monomorphic leader peptides and functions as a ligand for germ line receptors CD94/NKG2, which are expressed by natural killer cells and CD8+ T cells. We here describe that the conserved peptides are replaced by a novel peptide repertoire of surprising diversity as a result of impairments in the antigen-processing pathway. This novel peptide repertoire represents immunogenic neoantigens for CD8+ T cells, as we found that these Qa-1b–restricted T cells dominantly participated in the response to tumors with processing deficiencies. A surprisingly wide spectrum of target cells, irrespective of transformation status, MHC background, or type of processing deficiency, was recognized by this T cell subset, complying with the conserved nature of Qa-1b. Target cell recognition depended on T cell receptor and Qa-1b interaction, and immunization with identified peptide epitopes demonstrated in vivo priming of CD8+ T cells. Our data reveal that Qa-1b, and most likely its human homologue human leukocyte antigen-E, is important for the defense against processing-deficient cells by displacing the monomorphic leader peptides, which relieves the inhibition through CD94/NKG2A on lymphocytes, and by presenting a novel repertoire of immunogenic peptides, which recruits a subset of cytotoxic CD8+ T cells.
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Affiliation(s)
- Cláudia C Oliveira
- Department of Clinical Oncology, Leiden University Medical Center, 2333 ZA Leiden, Netherlands
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15
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Hulseberg PD, Zozulya A, Chu HH, Triccas JA, Fabry Z, Sandor M. The same well-characterized T cell epitope SIINFEKL expressed in the context of a cytoplasmic or secreted protein in BCG induces different CD8+ T cell responses. Immunol Lett 2009; 130:36-42. [PMID: 20005257 DOI: 10.1016/j.imlet.2009.12.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2009] [Accepted: 12/02/2009] [Indexed: 11/18/2022]
Abstract
Mycobacterium bovis BCG is still the most widely used vaccine against tuberculosis and CD8(+) T cells play important roles in fighting infection. We investigated how well antigen is processed and presented to CD8(+) T cells using the same well-characterized CD8(+) T cell epitope SIINFEKL expressed in either a cytoplasmic (GFP-OVA) or secreted (85B-OVA) context from BCG. We report that secreted SIINFEKL from 85B-OVA BCG is presented better than cytoplasmic SIINFEKL expressed by GFP-OVA BCG.
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Affiliation(s)
- Paul D Hulseberg
- Department of Pathology and Laboratory Sciences, University of Wisconsin, Madison, WI 53706, USA.
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16
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Wang B, Primeau TM, Myers N, Rohrs HW, Gross ML, Lybarger L, Hansen TH, Connolly JM. A single peptide-MHC complex positively selects a diverse and specific CD8 T cell repertoire. Science 2009; 326:871-4. [PMID: 19892989 DOI: 10.1126/science.1177627] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Pathogen recognition by T cells is dependent on their exquisite specificity for self-major histocompatibility complex (MHC) molecules presenting a bound peptide. Although this specificity results from positive and negative selection of developing T cells in the thymus, the relative contribution of these two processes remains controversial. To address the relation between the selecting peptide-MHC complex and the specificity of mature T cells, we generated transgenic mice that express a single peptide-MHC class I complex. We demonstrate that positive selection of CD8 T cells in these mice results in an MHC-specific repertoire. Although selection on a single complex is peptide promiscuous, mature T cells are highly peptide specific. Thus, positive selection imparts MHC and peptide specificity on the peripheral CD8 T cell repertoire.
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Affiliation(s)
- Baomei Wang
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
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17
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Wang X, Simone LC, Tuli A, Solheim JC. Comparative analysis of the impact of a free cysteine in tapasin on the maturation and surface expression of murine MHC class I allotypes. Int J Immunogenet 2009; 36:183-7. [PMID: 19490214 DOI: 10.1111/j.1744-313x.2009.00840.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Tapasin is a key molecule in the major histocompatibility complex (MHC) class I peptide-loading complex, interacting with several other proteins in the complex. An amino acid substitution at a free cysteine position in tapasin has been shown to disrupt the covalent association of tapasin with ERp57. In this study, we mutated the free cysteine in mouse tapasin, and analysed the effects on the cell surface expression of the mouse MHC class I molecules K(d) and K(b). The C95S substitution in mouse tapasin increased the proportion of open forms relative to folded forms for both types of MHC class I molecules at the cell surface. Furthermore, the C95S substitution resulted in increased association of tapasin with folded K(d). Overall, our studies with these mouse MHC class I allotypes have revealed that the free cysteine 95 in mouse tapasin influences stable expression at the plasma membrane for both MHC class I allotypes, and have shown that tapasin's interaction with folded K(d) is elevated by the C95S substitution in tapasin.
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Affiliation(s)
- X Wang
- Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE 68198-6805, USA
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18
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Markiewicz MA, Wise EL, Buchwald ZS, Cheney EE, Hansen TH, Suri A, Cemerski S, Allen PM, Shaw AS. IL-12 enhances CTL synapse formation and induces self-reactivity. THE JOURNAL OF IMMUNOLOGY 2009; 182:1351-61. [PMID: 19155481 DOI: 10.4049/jimmunol.182.3.1351] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Immunological synapse formation between T cells and target cells can affect the functional outcome of TCR ligation by a given MHC-peptide complex. Although synapse formation is usually induced by TCR signaling, it is not clear whether other factors can affect the efficiency of synapse formation. Here, we tested whether cytokines could influence synapse formation between murine CTLs and target cells. We found that IL-12 enhanced synapse formation, whereas TGFbeta decreased synapse formation. The enhanced synapse formation induced by IL-12 appeared to be functional, given that IL-12-treated cells could respond to weak peptides, including self-peptides, to which the T cells were normally unresponsive. These responses correlated with expression of functionally higher avidity LFA-1 on IL-12-treated CTLs. These findings have implications for the function of IL-12 in T cell-mediated autoimmunity.
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Affiliation(s)
- Mary A Markiewicz
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
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Fortier MH, Caron E, Hardy MP, Voisin G, Lemieux S, Perreault C, Thibault P. The MHC class I peptide repertoire is molded by the transcriptome. ACTA ACUST UNITED AC 2008; 205:595-610. [PMID: 18299400 PMCID: PMC2275383 DOI: 10.1084/jem.20071985] [Citation(s) in RCA: 128] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Under steady-state conditions, major histocompatibility complex (MHC) I molecules are associated with self-peptides that are collectively referred to as the MHC class I peptide (MIP) repertoire. Very little is known about the genesis and molecular composition of the MIP repertoire. We developed a novel high-throughput mass spectrometry approach that yields an accurate definition of the nature and relative abundance of unlabeled peptides presented by MHC I molecules. We identified 189 and 196 MHC I-associated peptides from normal and neoplastic mouse thymocytes, respectively. By integrating our peptidomic data with global profiling of the transcriptome, we reached two conclusions. The MIP repertoire of primary mouse thymocytes is biased toward peptides derived from highly abundant transcripts and is enriched in peptides derived from cyclins/cyclin-dependent kinases and helicases. Furthermore, we found that approximately 25% of MHC I-associated peptides were differentially expressed on normal versus neoplastic thymocytes. Approximately half of those peptides are derived from molecules directly implicated in neoplastic transformation (e.g., components of the PI3K-AKT-mTOR pathway). In most cases, overexpression of MHC I peptides on cancer cells entailed posttranscriptional mechanisms. Our results show that high-throughput analysis and sequencing of MHC I-associated peptides yields unique insights into the genesis of the MIP repertoire in normal and neoplastic cells.
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Affiliation(s)
- Marie-Hélène Fortier
- Institute for Research in Immunology and Cancer, University of Montreal, Montreal, Quebec, Canada H3C 3J7
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Johnstone C, Del Val M. Traffic of proteins and peptides across membranes for immunosurveillance by CD8(+) T lymphocytes: a topological challenge. Traffic 2007; 8:1486-94. [PMID: 17822406 DOI: 10.1111/j.1600-0854.2007.00635.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Cytotoxic CD8(+) T lymphocytes kill infected cells that display major histocompatibility complex (MHC) class I molecules presenting peptides processed from pathogen proteins. In general, the peptides are proteolytically processed from newly made endogenous antigens in the cytosol and require translocation to the endoplasmic reticulum (ER) for MHC class I loading. This last task is performed by the transporters associated with antigen processing (TAP). Sampling of suspicious pathogen-derived proteins reaches beyond the cytosol, and MHC class I loading can occur in other secretory or endosomal compartments besides the ER. Peptides processed from exogenous antigens can also be presented by MHC class I molecules to CD8(+) T lymphocytes, in this case requiring delivery from the extracellular medium to the processing and MHC class I loading compartments. The endogenous or exogenous antigen can be processed before or after its transport to the site of MHC class I loading. Therefore, mechanisms that allow the full-length protein or processed peptides to cross several subcellular membranes are essential. This review deals with the different intracellular pathways that allow the traffic of antigens to compartments proficient in processing and loading of MHC class I molecules for presentation to CD8(+) T lymphocytes and highlights the need to molecularly identify the transporters involved.
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Affiliation(s)
- Carolina Johnstone
- Unidad de Inmunología Viral, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Ctra. Pozuelo km 2, E-28220 Majadahonda, Madrid, Spain
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Rajapakse M, Zhang GL, Srinivasan KN, Schmidt B, Petrovsky N, Brusic V. PREDNOD, a prediction server for peptide binding to the H-2g7 haplotype of the non-obese diabetic mouse. Autoimmunity 2007; 39:645-50. [PMID: 17178561 DOI: 10.1080/08916930601062494] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The non-obese diabetic (NOD) mouse is a widely used animal model for study of autoimmune diseases, in particular human type 1 diabetes mellitus (T1DM). Identification of the subset of peptides that bind MHC molecules comprising the H-2g7 haplotype of NOD mouse and thereby representing potential NOD T-cell epitopes is important for research into the pathogenesis and immunotherapy of T1DM. The H-2g7 haplotype comprises the MHC class-I molecules Kd and Db and a single class-II molecule I-Ag7. We have developed a prediction system, PREDNOD, for accurate identification of peptides that bind the MHC molecules constituting the H-2g7 haplotype. PREDNOD is accessible at http://antigen.i2r.a-star.edu.sg/Ag7.
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Affiliation(s)
- Menaka Rajapakse
- Institute for Infocomm Research, 21 Heng Mui Keng Terrace, Singapore, Singapore, 119613
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Abstract
Classic major histocompatibility complex (MHC) proteins associate with antigen- and self-derived peptides in an allele-specific manner. Herein we present the crystal structure of the MHC class I protein H-2K(d) (K(d)) expressed by BALB/c mice in complex with an antigenic peptide derived from influenza A/PR/8/34 nucleoprotein (Flu, residues 147-155, TYQRTRALV). Analysis of our structure in conjunction with the sequences of naturally processed epitopes provides a comprehensive understanding of the dominant K(d) peptide-binding motif. We find that Flu residues Tyr(P2), Thr(P5), and Val(P9) are sequestered into the B, C, and F pockets of the K(d) groove, respectively. The shape and chemistry of the polymorphic B pocket make it an optimal binding site for the side chain of Tyr(P2) as the dominant anchoring residue of nonameric peptides. The non-polar F pocket limits the amino acid repertoire at P9 to hydrophobic residues such as Ile, Leu, or Val, whereas the C pocket restricts the size of the P5-anchoring side chain. We also show that Flu is accommodated in the complex through an unfavorable kink in the otherwise extended peptide backbone due to the presence of a prominent ridge in the K(d) groove. Surprisingly, this backbone conformation is strikingly similar to D(b)-presented peptides despite the fact that these proteins employ distinct motif-anchoring strategies. The results presented in this study provide a solid foundation for the understanding of K(d)-restricted antigen presentation and recognition events.
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Affiliation(s)
- Vesselin Mitaksov
- Department of Pathology and Immunology, Washington University School of Medicine, 660 South Euclid Avenue, St. Louis, MO 63110, USA
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