1
|
Croitoru CG, Constantinescu D, Pavel-Tanasa M, Cuciureanu DI, Cianga CM, Hodorog DN, Cianga P. HLA Class I and II Alleles in Anti-Acetylcholine Receptor Antibodies Positive and Double-Seronegative Myasthenia Gravis Patients of Romanian Descent. Neurol Int 2024; 16:1819-1836. [PMID: 39728756 DOI: 10.3390/neurolint16060130] [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: 09/04/2024] [Revised: 12/02/2024] [Accepted: 12/06/2024] [Indexed: 12/28/2024] Open
Abstract
Background: Several significant associations between certain Human Leukocyte Antigen (HLA) alleles and myasthenia gravis (MG) subtypes were established in populations from Western Europe and North America and, to a lesser extent, from China and Japan. However, such data are scarcely available for Eastern Europe. This study aimed to analyze the associations of HLA Class I and II alleles with MG and its serological subtypes (with anti-acetylcholine receptor autoantibodies, RAch+MG, and double-seronegative, dSNMG) in myasthenic patients of Romanian descent. Methods: We consecutively enrolled adult Romanian unrelated myasthenic patients, which were genotyped by next-generation sequencing for HLA-A, -B, -C, -DRB1 and -DQB1. The descent-matched controls were represented by two separate groups of random normal subjects genotyped for the main five HLA loci at the two-digit and four-digit levels, respectively, collected from the Allele Frequency Net Database. Results: A total of 40 patients (females: 80.00%; median age at onset: 42.5 years, range: 1-78; RAch+MG: 75.00%; dSNMG: 22.50%) were included. We were able to confirm previously acknowledged allelic associations: positive for HLA-B*08, DRB1*14:54 and DRB1*16:01 and negative for DRB1*13. However, we found some potential novel significant positive associations between MG and the HLA-A*02:36, B*47, B*73, B*44:27 and B*57:02 alleles. All alleles positively associated with MG remained significantly associated with RAch+MG, regardless of the patients' clinical and thymic heterogeneity. We found significant positive associations between dSNMG and the HLA-B*47, B*44:27 and DRB1*14:54 alleles that are shared with RAch+MG. Conclusions: These results suggest both distinct and common etiopathogenic mechanisms between dSNMG and RAch+MG. Our study pioneers allele associations in Romanian MG patients.
Collapse
Affiliation(s)
- Cristina Georgiana Croitoru
- Neurology Clinic I, "Prof. Dr. Nicolae Oblu" Emergency Clinical Hospital, 700309 Iași, Romania
- Department of Immunology, "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iași, Romania
| | - Daniela Constantinescu
- Department of Immunology, "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iași, Romania
- Immunology Laboratory, "St. Spiridon" Hospital, 700111 Iasi, Romania
| | - Mariana Pavel-Tanasa
- Department of Immunology, "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iași, Romania
- Immunology Laboratory, "St. Spiridon" Hospital, 700111 Iasi, Romania
| | - Dan Iulian Cuciureanu
- Neurology Clinic I, "Prof. Dr. Nicolae Oblu" Emergency Clinical Hospital, 700309 Iași, Romania
- Medical Department III-Neurology, "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iași, Romania
| | - Corina Maria Cianga
- Department of Immunology, "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iași, Romania
- Immunology Laboratory, "St. Spiridon" Hospital, 700111 Iasi, Romania
| | - Diana Nicoleta Hodorog
- Neurology Clinic I, "Prof. Dr. Nicolae Oblu" Emergency Clinical Hospital, 700309 Iași, Romania
- Medical Department III-Neurology, "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iași, Romania
| | - Petru Cianga
- Department of Immunology, "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iași, Romania
- Immunology Laboratory, "St. Spiridon" Hospital, 700111 Iasi, Romania
| |
Collapse
|
2
|
Grifoni A, Sidney J, Vita R, Peters B, Crotty S, Weiskopf D, Sette A. SARS-CoV-2 human T cell epitopes: Adaptive immune response against COVID-19. Cell Host Microbe 2021; 29:1076-1092. [PMID: 34237248 PMCID: PMC8139264 DOI: 10.1016/j.chom.2021.05.010] [Citation(s) in RCA: 226] [Impact Index Per Article: 56.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 04/23/2021] [Accepted: 05/18/2021] [Indexed: 02/07/2023]
Abstract
Over the past year, numerous studies in the peer reviewed and preprint literature have reported on the virological, epidemiological and clinical characteristics of the coronavirus, SARS-CoV-2. To date, 25 studies have investigated and identified SARS-CoV-2-derived T cell epitopes in humans. Here, we review these recent studies, how they were performed, and their findings. We review how epitopes identified throughout the SARS-CoV2 proteome reveal significant correlation between number of epitopes defined and size of the antigen provenance. We also report additional analysis of SARS-CoV-2 human CD4 and CD8 T cell epitope data compiled from these studies, identifying 1,400 different reported SARS-CoV-2 epitopes and revealing discrete immunodominant regions of the virus and epitopes that are more prevalently recognized. This remarkable breadth of epitope repertoire has implications for vaccine design, cross-reactivity, and immune escape by SARS-CoV-2 variants.
Collapse
Affiliation(s)
- Alba Grifoni
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology (LJI), La Jolla, CA 92037, USA
| | - John Sidney
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology (LJI), La Jolla, CA 92037, USA
| | - Randi Vita
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology (LJI), La Jolla, CA 92037, USA
| | - Bjoern Peters
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology (LJI), La Jolla, CA 92037, USA; Department of Medicine, Division of Infectious Diseases and Global Public Health, University of California, San Diego (UCSD), La Jolla, CA 92037, USA
| | - Shane Crotty
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology (LJI), La Jolla, CA 92037, USA; Department of Medicine, Division of Infectious Diseases and Global Public Health, University of California, San Diego (UCSD), La Jolla, CA 92037, USA
| | - Daniela Weiskopf
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology (LJI), La Jolla, CA 92037, USA
| | - Alessandro Sette
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology (LJI), La Jolla, CA 92037, USA; Department of Medicine, Division of Infectious Diseases and Global Public Health, University of California, San Diego (UCSD), La Jolla, CA 92037, USA.
| |
Collapse
|
3
|
Kuiper JJW, Venema WJ. HLA-A29 and Birdshot Uveitis: Further Down the Rabbit Hole. Front Immunol 2020; 11:599558. [PMID: 33262772 PMCID: PMC7687429 DOI: 10.3389/fimmu.2020.599558] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 10/16/2020] [Indexed: 12/26/2022] Open
Abstract
HLA class I alleles constitute established risk factors for non-infectious uveitis and preemptive genotyping of HLA class I alleles is standard practice in the diagnostic work-up. The HLA-A29 serotype is indispensable to Birdshot Uveitis (BU) and renders this enigmatic eye condition a unique model to better understand how the antigen processing and presentation machinery contributes to non-infectious uveitis or chronic inflammatory conditions in general. This review will discuss salient points regarding the protein structure of HLA-A29 and how key amino acid positions impact the peptide binding preference and interaction with T cells. We discuss to what extent the risk genes ERAP1 and ERAP2 uniquely affect HLA-A29 and how the discovery of a HLA-A29-specific submotif may impact autoantigen discovery. We further provide a compelling argument to solve the long-standing question why BU only affects HLA-A29-positive individuals from Western-European ancestry by exploiting data from the 1000 Genomes Project. We combine novel insights from structural and immunopeptidomic studies and discuss the functional implications of genetic associations across the HLA class I antigen presentation pathway to refine the etiological basis of Birdshot Uveitis.
Collapse
Affiliation(s)
- Jonas J. W. Kuiper
- Department of Ophthalmology, University Medical Center Utrecht, University of Utrecht, Utrecht, Netherlands
- Center for Translational Immunology, University Medical Center Utrecht, University of Utrecht, Utrecht, Netherlands
| | - Wouter J. Venema
- Department of Ophthalmology, University Medical Center Utrecht, University of Utrecht, Utrecht, Netherlands
- Center for Translational Immunology, University Medical Center Utrecht, University of Utrecht, Utrecht, Netherlands
| |
Collapse
|
4
|
Seldin MF, Alkhairy OK, Lee AT, Lamb JA, Sussman J, Pirskanen-Matell R, Piehl F, Verschuuren JJGM, Kostera-Pruszczyk A, Szczudlik P, McKee D, Maniaol AH, Harbo HF, Lie BA, Melms A, Garchon HJ, Willcox N, Gregersen PK, Hammarstrom L. Genome-Wide Association Study of Late-Onset Myasthenia Gravis: Confirmation of TNFRSF11A and Identification of ZBTB10 and Three Distinct HLA Associations. Mol Med 2015; 21:769-781. [PMID: 26562150 DOI: 10.2119/molmed.2015.00232] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Accepted: 11/09/2015] [Indexed: 01/05/2023] Open
Abstract
To investigate the genetics of late-onset myasthenia gravis (LOMG), we conducted a genome-wide association study imputation of>6 million single nucleotide polymorphisms (SNPs) in 532 LOMG cases (anti-acetylcholine receptor [AChR] antibody positive; onset age≥50 years) and 2,128 controls matched for sex and population substructure. The data confirm reported TNFRSF11A associations (rs4574025, P = 3.9 × 10-7, odds ratio [OR] 1.42) and identify a novel candidate gene, ZBTB10, achieving genome-wide significance (rs6998967, P = 8.9 × 10-10, OR 0.53). Several other SNPs showed suggestive significance including rs2476601 (P = 6.5 × 10-6, OR 1.62) encoding the PTPN22 R620W variant noted in early-onset myasthenia gravis (EOMG) and other autoimmune diseases. In contrast, EOMG-associated SNPs in TNIP1 showed no association in LOMG, nor did other loci suggested for EOMG. Many SNPs within the major histocompatibility complex (MHC) region showed strong associations in LOMG, but with smaller effect sizes than in EOMG (highest OR ~2 versus ~6 in EOMG). Moreover, the strongest associations were in opposite directions from EOMG, including an OR of 0.54 for DQA1*05:01 in LOMG (P = 5.9 × 10-12) versus 2.82 in EOMG (P = 3.86 × 10-45). Association and conditioning studies for the MHC region showed three distinct and largely independent association peaks for LOMG corresponding to (a) MHC class II (highest attenuation when conditioning on DQA1), (b) HLA-A and (c) MHC class III SNPs. Conditioning studies of human leukocyte antigen (HLA) amino acid residues also suggest potential functional correlates. Together, these findings emphasize the value of subgrouping myasthenia gravis patients for clinical and basic investigations and imply distinct predisposing mechanisms in LOMG.
Collapse
Affiliation(s)
- Michael F Seldin
- Department of Biochemistry and Molecular Medicine, and Department of Medicine, University of California, Davis, California, United States of America
| | - Omar K Alkhairy
- Division of Clinical Immunology, Karolinska Institutet at Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Annette T Lee
- The Robert S. Boas Center for Genomics and Human Genetics, Feinstein Institute for Medical Research, North Shore-LIJ Health System, Manhasset, New York, United States of America
| | - Janine A Lamb
- Centre for Integrated Genomic Medical Research, Manchester Academic Health Science Centre, University of Manchester, Manchester, United Kingdom
| | - Jon Sussman
- Department of Neurology, Greater Manchester Neuroscience Centre, Manchester, United Kingdom
| | | | - Fredrik Piehl
- Department of Neurology, Karolinska University Hospital Solna, Stockholm, Sweden
| | | | | | - Piotr Szczudlik
- Department of Neurology, Medical University of Warsaw, Warsaw, Poland
| | - David McKee
- Department of Neurology, Greater Manchester Neuroscience Centre, Manchester, United Kingdom
| | - Angelina H Maniaol
- Department of Neurology, Oslo University Hospital, Ullevål, Oslo, Norway
| | - Hanne F Harbo
- Department of Neurology, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Benedicte A Lie
- Department of Medical Genetics, University of Oslo and Oslo University Hospital, Oslo, Norway
| | - Arthur Melms
- Department of Neurology, Tübingen University Medical Center, Tübingen, Germany, and Neurologische Klinik, Universitàtsklinikum Erlangen, Erlangen, Germany
| | | | - Nicholas Willcox
- Nuffield Department of Clinical Neurosciences, Weatherall Institute for Molecular Medicine, University of Oxford, Oxford, United Kingdom
| | - Peter K Gregersen
- The Robert S. Boas Center for Genomics and Human Genetics, Feinstein Institute for Medical Research, North Shore-LIJ Health System, Manhasset, New York, United States of America
| | - Lennart Hammarstrom
- Division of Clinical Immunology, Karolinska Institutet at Karolinska University Hospital Huddinge, Stockholm, Sweden
| |
Collapse
|
5
|
Matsui M, Kawano M, Matsushita S, Akatsuka T. Introduction of a point mutation into an HLA class I single-chain trimer induces enhancement of CTL priming and antitumor immunity. MOLECULAR THERAPY-METHODS & CLINICAL DEVELOPMENT 2014; 1:14027. [PMID: 26015969 PMCID: PMC4362367 DOI: 10.1038/mtm.2014.27] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/01/2014] [Revised: 05/25/2014] [Accepted: 05/26/2014] [Indexed: 01/02/2023]
Abstract
We previously discovered one particular HLA-A*02:01 mutant that enhanced peptide-specific cytotoxic T lymphocyte (CTL) recognition in vitro compared to wild-type HLA-A*02:01. This mutant contains a single amino acid substitution from histidine to leucine at position 74 (H74L) that is located in the peptide-binding groove. To investigate the effect of the H74L mutation on the in vivo CTL priming, we took advantage of the technology of the HLA class I single-chain trimer (SCT) in which three components involving a peptide, β2 microglobulin and the HLA class I heavy chain are joined together via flexible linkers. We generated recombinant adenovirus expressing SCT comprised influenza A matrix protein (FMP)-derived peptide, β2 microglobulin and the H74L heavy chain. HLA-A*02:01 transgenic mice were immunized with the adenovirus, and the induction of peptide-specific CTLs and antitumor immunity was investigated. It was clearly shown that the H74L mutation enabled the HLA-A*02:01 SCT molecule to dramatically enhance both in vivo priming of FMP-specific CTLs and protection against a lethal challenge of tumor cells expressing FMP. These data present the first evidence that a simple point mutation in the HLA class I heavy chain of SCT is beneficial for improving CTL-based immunotherapy and prophylaxis to control tumors.
Collapse
Affiliation(s)
- Masanori Matsui
- Department of Microbiology, Saitama Medical University , Iruma-gun, Saitama, Japan
| | - Masaaki Kawano
- Department of Allergy and Immunology, Saitama Medical University , Iruma-gun, Saitama, Japan
| | - Sho Matsushita
- Department of Allergy and Immunology, Saitama Medical University , Iruma-gun, Saitama, Japan ; Allergy Center, Saitama Medical University , Iruma-gun, Saitama, Japan
| | - Toshitaka Akatsuka
- Department of Microbiology, Saitama Medical University , Iruma-gun, Saitama, Japan
| |
Collapse
|
6
|
Keeping the memory of influenza viruses. ACTA ACUST UNITED AC 2010; 58:e79-86. [DOI: 10.1016/j.patbio.2010.01.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2010] [Accepted: 01/26/2010] [Indexed: 01/08/2023]
|
7
|
Jiang X, Fares MA. Identifying coevolutionary patterns in human leukocyte antigen (HLA) molecules. Evolution 2009; 64:1429-45. [PMID: 19930454 DOI: 10.1111/j.1558-5646.2009.00903.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The antigenic peptide, major histocompatibility complex molecule (MHC; also called human leukocyte antigen, HLA), coreceptor CD8, or CD4 and T-cell receptor (TCR) function as a complex to initiate effectors' mechanisms of the immune system. The tight functional and physical interaction among these molecules may have involved strong coevolution links among domains within and between proteins. Despite the importance of unraveling such dependencies to understand the arms race of host-pathogen interaction, no previous studies have aimed at achieving such an objective. Here, we perform an exhaustive coevolution analysis and show that indeed such dependencies are strongly shaping the evolution and probably the function of these molecules. We identify intramolecular coevolution in HLA class I and II at domains important for their immune activity. Most of the amino acid sites identified to be coevolving in HLAI have been also detected to undergo positive Darwinian selection highlighting therefore their adaptive value. We also identify coevolution among antigen-binding pockets (P1-P9) and among these and TCR-binding sites. Conversely to HLAI, coevolution is weaker in HLAII. Our results support that such coevolutionary patterns are due to selective pressures of host-pathogen coevolution and cooperative binding of TCRs, antigenic peptides, and CD8/CD4 to HLAI and HLAII.
Collapse
Affiliation(s)
- Xiaowei Jiang
- Evolutionary Genetics and Bioinformatics Laboratory, Department of Genetics, Smurfit Institute of Genetics, University of Dublin, Trinity College Dublin, Dublin 2, Ireland.
| | | |
Collapse
|
8
|
Babon JAB, Cruz J, Orphin L, Pazoles P, Co MDT, Ennis FA, Terajima M. Genome-wide screening of human T-cell epitopes in influenza A virus reveals a broad spectrum of CD4(+) T-cell responses to internal proteins, hemagglutinins, and neuraminidases. Hum Immunol 2009; 70:711-21. [PMID: 19524006 PMCID: PMC2767101 DOI: 10.1016/j.humimm.2009.06.004] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2009] [Revised: 06/01/2009] [Accepted: 06/03/2009] [Indexed: 12/16/2022]
Abstract
We performed a genome-wide screening for T-cell epitopes using synthetic peptides that encompass all of the influenza A viral proteins, including subtype variants for hemagglutinin (HA; H1, H3, and H5) and neuraminidase (NA; human and avian N1 and N2) proteins, based on the sequence information of recently circulating strains. We identified a total of 83 peptides, 54 of them novel, to which specific T cells were detectable in interferon-gamma (IFN-gamma) enzyme-linked immunosorbent spot assays using peripheral blood mononuclear cells from four healthy adult donors. The surface glycoproteins, HA and NA, major components of vaccines, expressed many T-cell epitopes. HA and matrix protein 1 expressed more T-cell epitopes than other viral proteins, most of which were recognized by CD4(+) T cells. We established several cytotoxic CD4(+) T-cell lines from these donors. We also analyzed H1 and H3 HA-specific T-cell responses using the peripheral blood mononuclear cells of 30 hospital workers. Fifty-three percent of donors gave a positive response to H3 HA peptides, whereas 17% gave a positive response to H1 HA peptides. Our genome-wide screening is useful in identifying T-cell epitopes and is complementary to the approach based on the predicted binding peptides to well-studied HLA-A, -B, and -DR alleles.
Collapse
Affiliation(s)
- Jenny Aurielle B Babon
- Center for Infectious Disease and Vaccine Research, University of Massachusetts Medical School, Worcester, MA 01655, USA
| | | | | | | | | | | | | |
Collapse
|
9
|
Liu JB, Li M, Chen H, Zhong SQ, Yang S, Du WD, Hao JH, Zhang TS, Zhang XJ, Zeegers MP. Association of vitiligo with HLA-A2: a meta-analysis. J Eur Acad Dermatol Venereol 2007; 21:205-13. [PMID: 17243956 DOI: 10.1111/j.1468-3083.2006.01899.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Linkage and association studies suggest that the human leucocyte antigen (HLA) region may be involved in the genetic susceptibility of vitiligo. HLA-A2 has been reported to be associated with vitiligo in some, but not all, studies. OBJECTIVE To identify sources of the heterogeneity among studies and to quantify effect estimates, we examined the association of HLA-A2 with vitiligo in a meta-analysis of all observational studies comparing the frequencies of HLA-A2 between vitiligo individuals and controls during 1966-2005. METHODS The summary odds ratio (OR) was calculated by using a fixed- or a random-effects model. Meta-regression analysis was undertaken to investigate the effects of study characteristics on the pooled OR. RESULTS Eleven case-controlled studies fulfilled our inclusion criteria. The studies identified a total of 777 patients and 4820 controls. Meta-analysis showed a significantly increased frequency of HLA-A2 in vitiligo among cases [OR = 2.07, 95% confidence interval (CI) 1.67-2.58]. Heterogeneity was explained by the quality of the study and the ethnic background of the participants. Meta-regression analysis further showed that the percentage of familial vitiligo among the subjects had a significant effect on the pooled OR (P = 0.008). No study had a significant effect on the pooled OR and no publication bias presented in the studies analysed (P = 0.688). CONCLUSION These findings strongly suggest an association between HLA-A2 and vitiligo.
Collapse
Affiliation(s)
- J-B Liu
- Department of Dermatology, Huiyang People's Hospital, Huizhou, Guangdong, China.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Kamoun M, Israni AK, Joffe MM, Hoy T, Kearns J, Mange KC, Feldman D, Goodman N, Rosas SE, Abrams JD, Brayman KL, Feldman HI. Assessment of differences in HLA-A, -B, and -DRB1 allele mismatches among African-American and non-African-American recipients of deceased kidney transplants. Transplant Proc 2007; 39:55-63. [PMID: 17275474 DOI: 10.1016/j.transproceed.2006.10.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2006] [Indexed: 02/08/2023]
Abstract
Among recipients of deceased donor kidney transplants, African-Americans experience a more rapid rate of kidney allograft loss than non-African-Americans. The purpose of this study was to characterize and quantify the HLA-A, -B, and -DRB1 allele mismatches and amino acid substitutions at antigen recognition sites among African-American and non-African-American recipients of deceased donor kidney transplants matched at the antigen level. In recipients with zero HLA antigen mismatches, the degree of one or two HLA allele mismatches for both racial groups combined was 47%, 29%, and 11% at HLA-DRB1, HLA-B, and HLA-A, respectively. There was a greater number of allele mismatches in African-Americans than non-African-Americans at HLA-A (P < .0001), -B (P = .096), and -DRB1 loci (P < .0001). For both racial groups, the HLA allele mismatches were predominantly at A2 for HLA-A; B35 and B44 for HLA-B; but multiple specificities for HLA-DRB1. The observed amino acid mismatches were concentrated at a few functional positions in the antigen binding site of HLA-A and -B and -DRB1 molecules. Future studies are ongoing to assess the impact of these HLA mismatches on kidney allograft loss.
Collapse
Affiliation(s)
- M Kamoun
- Department of Pathology and Laboratory Medicine, Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Liu F, Wang S, Ye Y, Zhang H, Zhang Y, Chen W. Identification and functional perspective of a novel HLA-A allele: A*0279. Immunogenetics 2006; 58:339-46. [PMID: 16583211 DOI: 10.1007/s00251-006-0087-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2005] [Accepted: 01/10/2006] [Indexed: 01/06/2023]
Abstract
A novel HLA-A allele, HLA-A*0279, was identified using PCR-SSP and PCR-SBT methods. It is inheritable. HLA-A*0279 differs from HLA-A*020601 by a single nucleotide at position 497 in exon 3, leading to an amino acid change from Threonine to Isoleucine at the alpha2 helix of HLA molecule. To investigate whether the altered amino acid residue could affect its peptide-binding repertoire, we compared the predicted crystal structure of HLA-A*020601 and HLA-A*0279 by Swiss-PdbViewer software analysis. We found that the crystal structure of the two molecules is very similar except for a difference in the number of hydrogen bonds they can possibly form, which in turn could affect their structural stability. To test whether HLA-A*0279 has the ability to cross-present A*0201 - restricted peptides to T cells, the full lenght cDNA of HLA-A*0201, -A* 020601 and -A*0279 were respectively transfected into COS-7 cells, which were then used as targets in IFN-gamma release Elispot assay. A*2079 was found to be able to present A*0201- restricted peptides to and induce the response of CTL, thus it can be classified as member of the HLA-A2 functional supertype family. This finding would benefit the design of peptide vaccines to be applied in broader populations.
Collapse
Affiliation(s)
- Fangfang Liu
- Department of Gastroenterological Surgery, Surgical Oncology Laboratory, People's Hospital, Peking University, 100044, Beijing, People' Republic of China
| | | | | | | | | | | |
Collapse
|
12
|
Dörrschuck A, Schmidt A, Schnürer E, Glückmann M, Albrecht C, Wölfel C, Lennerz V, Lifke A, Di Natale C, Ranieri E, Gesualdo L, Huber C, Karas M, Wölfel T, Herr W. CD8+ cytotoxic T lymphocytes isolated from allogeneic healthy donors recognize HLA class Ia/Ib-associated renal carcinoma antigens with ubiquitous or restricted tissue expression. Blood 2004; 104:2591-9. [PMID: 15231579 DOI: 10.1182/blood-2004-02-0459] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Allogeneic hematopoietic stem cell transplantation can induce considerable tumor remissions in metastatic renal-cell carcinoma (RCC) patients. The precise effector mechanisms mediating these graft-versus-tumor reactions are unknown. We studied RCC-directed CD8(+) T-cell responses in blood lymphocytes of healthy individuals matched with established RCC cell lines for HLA-class I. In 21 of 22 allogeneic mixed lymphocyte/tumor-cell cultures (MLTCs), RCC-reactive cytotoxic T-lymphocytes (CTLs) were readily obtained. From MLTCs, 121 CD8(+) CTL clones with memory phenotype were isolated. Their anti-RCC reactivity was restricted by multiple classical HLA-Ia molecules, in particular by HLA-A2, -A3, -B7, -B44, -Cw7, and by a nonclassical HLA-Ib determinant. Extensive cross-reactivity analyses on a broad target panel identified CTLs that recognize antigens with expression restricted to renal tissue or to renal and colon tumors. Other CTLs were directed against antigens with broader tissue distribution being expressed in various epithelial and nonepithelial tumors or, additionally, in hematopoietic cells. With microcapillary liquid chromatography and matrix-assisted laser desorption ionization time-of-flight (MALDI-TOF)/TOF mass spectrometry, we identified the HLA-A*0301-associated nonpolymorphic peptide KLPNSVLGR encoded by the ubiquitously expressed Eps15 homology domain-containing 2 gene as a CTL target. Defining human RCC antigens recognized by alloreactive CTLs may allow to improve the specificity and efficiency of allogeneic cell therapy (eg, specific donor-lymphocyte infusions or vaccination) in metastatic RCC patients.
Collapse
Affiliation(s)
- Andreas Dörrschuck
- Department of Medicine III, Hematology and Oncology, Johannes Gutenberg-University of Mainz, Langenbeckstrasse 1, D-55101 Mainz, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
13
|
Hennecke J, Wiley DC. Structure of a complex of the human alpha/beta T cell receptor (TCR) HA1.7, influenza hemagglutinin peptide, and major histocompatibility complex class II molecule, HLA-DR4 (DRA*0101 and DRB1*0401): insight into TCR cross-restriction and alloreactivity. J Exp Med 2002; 195:571-81. [PMID: 11877480 PMCID: PMC2193773 DOI: 10.1084/jem.20011194] [Citation(s) in RCA: 162] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
The alpha/beta T cell receptor (TCR) HA1.7 specific for the hemagglutinin (HA) antigen peptide from influenza A virus is HLA-DR1 restricted but cross-reactive for the HA peptide presented by the allo-major histocompatibility complex (MHC) class II molecule HLA-DR4. We report here the structure of the HA1.7/DR4/HA complex, determined by X-ray crystallography at a resolution of 2.4 A. The overall structure of this complex is very similar to the previously reported structure of the HA1.7/DR1/HA complex. Amino acid sequence differences between DR1 and DR4, which are located deep in the peptide binding groove and out of reach for direct contact by the TCR, are able to indirectly influence the antigenicity of the pMHC surface by changing the conformation of HA peptide residues at position P5 and P6. Although TCR HA1.7 is cross-reactive for HA presented by DR1 and DR4 and tolerates these conformational differences, other HA-specific TCRs are sensitive to these changes. We also find a dependence of the width of the MHC class II peptide-binding groove on the sequence of the bound peptide by comparing the HA1.7/DR4/HA complex with the structure of DR4 presenting a collagen peptide. This structural study of TCR cross-reactivity emphasizes how MHC sequence differences can affect TCR binding indirectly by moving peptide atoms.
Collapse
Affiliation(s)
- Jens Hennecke
- Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138, USA.
| | | |
Collapse
|
14
|
Dyall J, Latouche JB, Schnell S, Sadelain M. Lentivirus-transduced human monocyte-derived dendritic cells efficiently stimulate antigen-specific cytotoxic T lymphocytes. Blood 2001; 97:114-21. [PMID: 11133750 DOI: 10.1182/blood.v97.1.114] [Citation(s) in RCA: 104] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Dendritic cells (DCs) are professional antigen-presenting cells that are highly effective adjuvants for immunizing against pathogens and tumor antigens. The potential merit of genetic approaches to loading DCs with antigens is to express high and sustained levels of proteins that can be subsequently processed and presented to T lymphocytes. Replication-defective oncoretroviruses are able to efficiently transduce CD34(+) progenitor-derived DCs but not monocyte-derived DCs. Here, it is shown that efficient gene transfer is obtained using a human immunodeficiency virus-1-derived lentiviral vector deleted of all structural and accessory genes. Infection of immature DCs with the lentiviral vector at a multiplicity of infection of 20 resulted in stable gene expression in 30% to 40% of the matured DCs. Proviral DNA was detectable by Alu polymerase chain reaction for the lentiviral but not the oncoretroviral vector. Most importantly, it is demonstrated that lentivirus-transduced DCs were fully functional and effectively activated autologous HLA A2.1(+) peripheral blood cytotoxic T lymphocytes (CTLs). DCs expressing lentiviral vector-encoded Flu peptide were at least as efficient as DCs pulsed with the same peptide in stimulating specific CTLs. The efficacy of the lentivirus-transduced DCs was further demonstrated by their ability to directly activate freshly harvested peripheral blood Flu-specific CTLs in the absence of CD4(+) T-cell help and exogenous cytokines. The availability of a stable gene delivery system based on a multiply attenuated lentivirus that does not encode any viral protein and that allows sustained antigen presentation by DCs derived from blood monocytes will be very useful for the biologic investigation of DCs and the improvement of immunotherapeutic strategies involving DCs.
Collapse
Affiliation(s)
- J Dyall
- Department of Human Genetics, the Gene Transfer and Somatic Cell Engineering Facility and the Immunology Program, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA
| | | | | | | |
Collapse
|
15
|
Fleischhauer K, Gattinoni L, Lietti G, Zino E, Bordignon C, Traversari C. Identification of tumor antigen-specific cytotoxic T lymphocytes cross-recognizing allogeneic major histocompatibility class I molecules. TISSUE ANTIGENS 2000; 56:19-29. [PMID: 10958352 DOI: 10.1034/j.1399-0039.2000.560103.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Adoptive immunotherapy of cancer utilizes tumor antigen-specific cytotoxic T lymphocytes (CTL) as mediators of a targeted anti-tumor effect. In this study, we show that such CTL can be able to cross-recognize allogeneic major histocompatibility complex (MHC) molecules in a phenomenon of molecular mimicry. A self histo-leukocyte antigen (HLA) A*0201-restricted CTL specific for peptide MT27-35 from the human differentiation antigen Melan-A/MART-1 was shown to cross-recognize allogeneic A*0220 molecules which differ from syngeneic A*0201 for a single amino acid substitution at position 66 of the antigen-binding groove. A*0220 molecules were recognized on a variety of human cells of different histological origin but not on COS-7 cells. A second self-A*0201-restricted CTL, specific for peptide D10/6-271 encoded by the tumor-specific DAM-gene family, was shown to cross-recognize allogeneic B*3701 molecules which differ from syngeneic A*0201 by 32 amino acids in the peptide antigen-binding cleft. B*3701 molecules were recognized on a variety of cell types including COS-7 cells. These data raise new safety issues for clinical trials of cancer immunotherapy using adoptive transfer of in vitro generated, allogeneic CTL with specific anti-tumor activity.
Collapse
Affiliation(s)
- K Fleischhauer
- Cancer Immunology and Immunotherapy Program, Istituto Scientifico H.S. Raffaele, Milan, Italy.
| | | | | | | | | | | |
Collapse
|
16
|
Gatz SA, Pohla H, Schendel DJ. A PCR-SSP method to specifically select HLA-A*0201 individuals for immunotherapeutic studies. TISSUE ANTIGENS 2000; 55:532-47. [PMID: 10902609 DOI: 10.1034/j.1399-0039.2000.550604.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
HLA-A*0201 is an important restriction element for peptide presentation to T cells in disease and cancer. Mutation studies and analyses using cytotoxic T lymphocytes have shown the functional relevance of subtype-specific differences in HLA-A2 molecules for peptide binding and T-cell receptor recognition. Therefore, many immunotherapeutic studies need to accurately select HLA-A*0201-positive individuals. We designed an easy, robust approach based on the polymerase chain reaction using sequence-specific primers (PCR-SSP) to specifically distinguish A*0201-positive individuals from other HLA-A2 subtypes described to date. The first step includes reactions that give information whether the sample donor is HLA-A2 and, if so, whether the individual is homozygous or heterozygous for HLA-A2. Further, it is determined whether the sample has an HLA-A*0209 or an HLA-A*0201 sequence at the corresponding position in exon 4. Samples that may contain an HLA-A*0201 allele according to the results of this first step are subtyped in a second step nested PCR. Here the strategy is focussed on the discrimination of HLA-A*0201 from the other subtypes by considering divergent nucleotide positions in two ways. One SSP combination amplifies the HLA-A*0201 sequence while a corresponding SSP combination specifically amplifies the subtype or group of subtypes differing from HLA-A*0201 at this position. Thus, at relevant polymorphic nucleotide positions the HLA-A*0201 sequence is both directly and indirectly confirmed. This strategy strongly enhances the reliability of the subtyping and allows better verification of HLA-A*0201-positive patient selection for clinical studies.
Collapse
Affiliation(s)
- S A Gatz
- Institute of Molecular Immunology, GSF National Research Center for the Environment and Health, Munich, Germany
| | | | | |
Collapse
|
17
|
Park MH, Whang DH, Kang SJ, Han KS. HLA-A*02 allele frequencies and haplotypic associations in Koreans. TISSUE ANTIGENS 2000; 55:250-6. [PMID: 10777100 DOI: 10.1034/j.1399-0039.2000.550308.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We have investigated the frequencies of HLA-A*02 alleles and their haplotypic associations with HLA-B and -DRB1 loci in 439 healthy unrelated Koreans, including 214 parents from 107 families. All of the 227 samples (51.7%) typed as A2 by serology were analyzed for A*02 alleles using polymerase chain reaction (PCR)-low ionic strength-single-strand conformation polymorphism (LIS-SSCP) method. A total of six different A*02 alleles were detected (A*02 allele frequency 29.6%): A*0201/9 (16.6%), *0203 (0.5%), *0206 (9.3%), *0207 (3.0%), and one each case of *0210 and *02 undetermined type. Two characteristic haplotypes showing the strongest linkage disequilibrium were A*0203-B38-DRB]*1502 and A*0207-B46-DRB1*0803. Besides these strong associations, significant two-locus associations (P<0.001) were observed for A*0201 with B61, DRB1*0901 and DRB1*1401, and for A*0206 with B48 and B61. HLA haplotypes carrying HLA-A2 showed a variable distribution of A*02 alleles, and all of the eight most common A2-B-DR haplotypes occurring at frequencies of > or =1% were variably associated with two different A*02 alleles. These results demonstrate that substantial heterogeneity is present in the distribution of HLA-A*02 alleles and related haplotypes in Koreans.
Collapse
Affiliation(s)
- M H Park
- Department of Clinical Pathology, Seoul National University College of Medicine, Korea.
| | | | | | | |
Collapse
|
18
|
Caley RR, Peace-Brewer AL, Matsui M, Frelinger JA. Analysis of the mutant HLA-A*0201 heavy chain H74L: impaired TAP-dependent peptide loading. Hum Immunol 1999; 60:743-54. [PMID: 10527381 DOI: 10.1016/s0198-8859(99)00022-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A mutation of the HLA-A*0201 heavy chain at position 74 from histidine to leucine (H74L) resulted in a molecule with an interesting phenotype. H74L-expressing targets were recognized by peptide-specific HLA-A*0201-restricted cytotoxic T lymphocytes at lower peptide concentrations than wild type HLA-A*0201. H74L's improved ability to sensitize cells for tysis was due to its enhanced capability to bind exogenous peptide. Furthermore, this phenotype of improved exogenous binding and functional recognition was not peptide-specific. In contrast, the H74L molecule failed to present the HIV- HLA-A2-restricted pol peptide when expressed and processed endogenously. The inability to bind endogenous pol could be rescued by preceding the pol peptide with a signal sequence. The defect affecting endogenous presentation, therefore, appeared to be limited to the TAP-dependent pathway. Surprisingly, the H74L heavy chain was able to enter the defined MHC class I pathway and associate with beta2M, calreticulin, tapasin, and TAP. Despite the presence of the H74L heavy chain at the TAP complex, H74L was functionally inefficient at loading TAP-dependent peptides. H74L may help elucidate further steps in the process of loading TAP-dependent peptides into the class I cleft.
Collapse
Affiliation(s)
- R R Caley
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, 27599-7290, USA
| | | | | | | |
Collapse
|
19
|
|
20
|
Fleischhauer K, Zino E, Arevalo-Herrera M, Herrera S, Valmori D, Cerottini JC, Benazzi E, Bordignon C, Romero P. Differential expression of HLA-A*02 subtypes in Colombian Blacks and Mestizos. TISSUE ANTIGENS 1998; 51:204-9. [PMID: 9510377 DOI: 10.1111/j.1399-0039.1998.tb02966.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- K Fleischhauer
- Department of Biology and Biotechnology, Istituto Scientifico H.S. Raffaele, Milano, Italy.
| | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Stenger S, Mazzaccaro RJ, Uyemura K, Cho S, Barnes PF, Rosat JP, Sette A, Brenner MB, Porcelli SA, Bloom BR, Modlin RL. Differential effects of cytolytic T cell subsets on intracellular infection. Science 1997; 276:1684-7. [PMID: 9180075 DOI: 10.1126/science.276.5319.1684] [Citation(s) in RCA: 410] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
In analyzing mechanisms of protection against intracellular infections, a series of human CD1-restricted T cell lines of two distinct phenotypes were derived. Both CD4(-)CD8(-) (double-negative) T cells and CD8(+) T cells efficiently lysed macrophages infected with Mycobacterium tuberculosis. The cytotoxicity of CD4(-)CD8(-) T cells was mediated by Fas-FasL interaction and had no effect on the viability of the mycobacteria. The CD8(+) T cells lysed infected macrophages by a Fas-independent, granule-dependent mechanism that resulted in killing of bacteria. These data indicate that two phenotypically distinct subsets of human cytolytic T lymphocytes use different mechanisms to kill infected cells and contribute in different ways to host defense against intracellular infection.
Collapse
Affiliation(s)
- S Stenger
- Department of Microbiology and Immunology, University of California Los Angeles School of Medicine, Los Angeles, CA 90095, USA
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Fleischhauer K, Zino E, Mazzi B, Severini GM, Benazzi E, Bordignon C. HLA-A*02 subtype distribution in Caucasians from northern Italy: identification of A*0220. TISSUE ANTIGENS 1996; 48:673-9. [PMID: 9008310 DOI: 10.1111/j.1399-0039.1996.tb02691.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
This study describes a comprehensive easy to perform PCR-SSOP typing approach suitable for complete genomic subtyping of HLA-A*02. A single 1.6 kb PCR-amplificate spanning exons 2, 3 and 4 of the HLA-A*02 gene was used for hybridization with a panel of twenty-four SSOPs. This allowed unequivocal assignment of all so far known HLA-A2 subtypes, including A*0209 and A*0215N which differ for nucleotide substitutions in exon 4, without the need for two separate amplifications. Using this approach, HLA-A*02 subtype distribution was analyzed in 218 samples from unrelated, healthy individuals from northern Italy enrolled in the Italian Bone Marrow Registry and typed as HLA-A2 by serology or generic molecular analysis. As expected, A*0201 was found in the majority (92.6%) of samples. However, a significant number (6.8%) of individuals carried A*0205. Furthermore, A*0202, A*0208, A*0209 and A*0217, so far not described in Caucasians, were detected in a low number of samples (frequency ranging from 0.45% to 1.8%). Finally, a novel HLA-A*02 subtype, A*0220, was detected in 0.9% of the samples. As confirmed by DNA sequencing of exons 2 and 3, this allele is identical to A*0201 except for a single nucleotide substitution in codon 66 which changes the predicted amino acid sequence form Lys to Asn. The findings of this study have implications for the selection of HLA-A*02+ donors in unrelated bone marrow transplantation and of patients for specific immuno-therapy with HLA-A*02 restricted peptide vaccines.
Collapse
Affiliation(s)
- K Fleischhauer
- Department of Biology and Biotechnology (DIBIT), Istituto Scientifico H.S. Raffaele, Milano, Italy
| | | | | | | | | | | |
Collapse
|
23
|
Nössner E, Falk CS, Jantzer P, Reinhardt C, Steinle A, Schendel DJ. The HLA likes and dislikes of allospecific and non-MHC-restricted cytotoxic T lymphocytes. Immunol Rev 1996; 154:105-35. [PMID: 9034865 DOI: 10.1111/j.1600-065x.1996.tb00931.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- E Nössner
- Institute of Immunology, University of Munich, Germany
| | | | | | | | | | | |
Collapse
|
24
|
Krausa P, Browning MJ. HLA-A2 polymorphism and immune functions. EUROPEAN JOURNAL OF IMMUNOGENETICS : OFFICIAL JOURNAL OF THE BRITISH SOCIETY FOR HISTOCOMPATIBILITY AND IMMUNOGENETICS 1996; 23:261-74. [PMID: 8858283 DOI: 10.1111/j.1744-313x.1996.tb00122.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- P Krausa
- Nuffield Department of Medicine, Institute of Molecular Medicine, Oxford, UK
| | | |
Collapse
|
25
|
Peace-Brewer AL, Tussey LG, Matsui M, Li G, Quinn DG, Frelinger JA. A point mutation in HLA-A*0201 results in failure to bind the TAP complex and to present virus-derived peptides to CTL. Immunity 1996; 4:505-14. [PMID: 8630735 DOI: 10.1016/s1074-7613(00)80416-1] [Citation(s) in RCA: 118] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Mutating the HLA-A*0201 heavy chain from threonine to lysine at position 134 (T134K) results in a molecule that presents exogenous peptide, but cannot present endogenously derived antigen. This is reflected in diminished cell surface expression and altered intracellular trafficking of T134K. The failure of T134K to present endogenous antigen can be overcome by using an ER targeting sequence, suggesting that the antigen presentation defect is restricted to TAP-dependent peptide loading. The ability of T134K to load peptide in a TAP-dependent manner is dramatically reduced compared with HLA-A*0201. By coimmunoprecipitation there is no detectable association of the T134K molecule with the TAP complex. Thus, T134K selectively affects TAP association and peptide loading, suggesting a requirement for the direct interaction of MHC class I heavy chain and the TAP complex for efficient presentation of endogenous antigen.
Collapse
Affiliation(s)
- A L Peace-Brewer
- Department of Microbiology and Immunology, University of North Carolina, Chapel Hill 27599-7290, USA
| | | | | | | | | | | |
Collapse
|
26
|
Barouch D, Friede T, Stevanović S, Tussey L, Smith K, Rowland-Jones S, Braud V, McMichael A, Rammensee HG. HLA-A2 subtypes are functionally distinct in peptide binding and presentation. J Exp Med 1995; 182:1847-56. [PMID: 7500030 PMCID: PMC2192253 DOI: 10.1084/jem.182.6.1847] [Citation(s) in RCA: 86] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Nearly half of HLA-A2-positive individuals in African populations have a subtype of HLA-A2 other than the A*0201 allele. We have isolated the common African HLA-A2 subtype genes from Epstein-Barr virus-transformed B cell lines and have established stable class I reduced transfectants expressing these alleles. We have studied the peptide binding and presentation properties of A*0201, A*0202, A*0205, A*0214, and A*6901 by a combination of approaches: assaying direct binding of labeled synthetic peptides, studying the ability of antigen-specific cytotoxic T lymphocytes to recognize peptide-pulsed cells, and sequencing peptide pools and individual ligands eluted from cells. We find that A*0201-restricted peptides can also bind to A*0202 but do not bind strongly to the other alleles in this study. We show that some cytotoxic T lymphocytes can recognize all subtypes capable of binding an antigenic peptide, whereas others are subtype specific. Sequencing of eluted peptides reveals that A*0202 has a similar peptide motif to A*0201, but that A*0205, A*0214, and A*6901 have different motifs. These data strongly support a model in which residue 9 (Phe or Tyr) of the A2/A68/A69 molecules is a critical factor in determining the specificity of the B pocket of the major histocompatibility complex and the position 2 anchor residue of associated peptides. We conclude that a single-amino acid difference in the major histocompatibility complex can be sufficient to cause a dramatic change in the nature of bound peptides, implying that individuals with closely related HLA subtypes may present very different repertoires of antigenic peptides to T cells in an immune response. It is likely to be a general phenomenon that very similar class I subtypes will behave as functionally distinct HLA allotypes.
Collapse
Affiliation(s)
- D Barouch
- Institute of Molecular Medicine, John Radcliffe Hospital, Headington, Oxford, United Kingdom
| | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Carcassi C, Krausa P, Bodmer J, Contu L, Browning M. Characterization of HLA-A*02 subtypes in the Sardinian population. TISSUE ANTIGENS 1995; 46:391-3. [PMID: 8838349 DOI: 10.1111/j.1399-0039.1995.tb03132.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- C Carcassi
- Istituto di Clinica Medica, Cattedra di Genetica Medica, Cagliari, Italy
| | | | | | | | | |
Collapse
|
28
|
Krausa P, Brywka M, Savage D, Hui KM, Bunce M, Ngai JL, Teo DL, Ong YW, Barouch D, Allsop CE. Genetic polymorphism within HLA-A*02: significant allelic variation revealed in different populations. TISSUE ANTIGENS 1995; 45:223-31. [PMID: 7638857 DOI: 10.1111/j.1399-0039.1995.tb02444.x] [Citation(s) in RCA: 113] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
HLA-A2 is present at high frequency in most populations, as identified by serological and biochemical means. The value of these methods is limited by their failure to discriminate between the products of the 14 known allelic HLA-A*02 variants. The great majority of genetic polymorphism which defines the allelic variants is found in exons 2 and 3 of the A*02 genes. These exons encode the alpha-1 and alpha-2 domains of the HLA Class I molecules, and variation within the genes may influence the peptide binding specificity of the gene products of each allele. Failure to accurately assign the allelic types has implications in transplantation, in interpretation of cellular assays and in the understanding of HLA disease associations. We have developed a method for determining the 14 known alleles of HLA-A*02 by use of ARMS-PCR to determine the degree of variation of HLA-A*02 alleles in 3 different population groups. Considerable variation was found in the relative frequencies of particular A*02 alleles between Caucasian, oriental and black individuals. Our results indicate the importance of ethnic origin in terms of the expected HLA-A*02 allelic profile, and emphasize the functional significance of allele specific subtyping of HLA-A*02.
Collapse
Affiliation(s)
- P Krausa
- Cancer Immunology Lab, ICRF, Institute of Molecular Medicine, Oxford, United Kingdom
| | | | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Sheil JM, Schell TD, Shepherd SE, Klimo GF, Kioschos JM, Paterson Y. Presentation of a horse cytochrome c peptide by multiple H-2b class I major histocompatibility complex (MHC) molecules to C57BL/6- and bm1-derived cytotoxic T lymphocytes: presence of a single MHC anchor residue may confer efficient peptide-specific CTL recognition. Eur J Immunol 1994; 24:2141-9. [PMID: 7522163 DOI: 10.1002/eji.1830240931] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
In this study the immunogenic tryptic fragment from a horse cytochrome c (cyt c) digest recognized by cytotoxic T lymphocytes (CTL) induced by in vitro peptide stimulation from C57BL/6 (B6) and mutant B6.C-H-2bm1 (bm1) mice is identified. An identical sequence, p40-53, is recognized by CTL from both B6 and bm1 mice. In addition, both B6 bm1 cloned CTL lines display unusual major histocompatibility complex (MHC) class I-restricted recognition of this peptide in that they respond to it in the context of H-2Kb, H-2Db, and H-2Kbm1 class I molecules, although the sequence lacks the usual structural Kb and Db peptide-binding motifs. Truncated analogues which resemble the lengths of naturally processed MHC class I-presented peptides, confer reactivity for B6 and bm1 CTL against EL4 (H-2b) targets as well as the L cell transfectants, L+Kb, L+Db, and L+Kbm1. The antigenic peptide with the greatest potency is p41-49, which appears to be generated by angiotensin converting enzyme cleavage of the full-length p40-53 tryptic peptide. The minimum antigenic peptide recognized by both B6 and bm1 CTL, and which targets lysis on each of the transfectants, is the hexamer p43-48 peptide from horse cyt c. Residues Pro44 and Thr47, which occupy polymorphic positions with respect to other species-variant cyt c molecules, influence recognition of these peptides differently for the B6 and bm1 CTL. The ability of H-2Kb, H-2Db, and mutant H-2Kbm1 class I molecules to present the same peptide to a single cloned CTL is discussed in the context of current knowledge of peptide anchor residues and side chain-specific binding pockets in the MHC class I peptide-binding site.
Collapse
Affiliation(s)
- J M Sheil
- Department of Microbiology & Immunology, West Virginia University, Morgantown 26506-9177
| | | | | | | | | | | |
Collapse
|
30
|
Hioe CE, McKinney DM, Frelinger JA, McMillan M. Mutations inside but not outside the peptide binding cleft of the H-2 Ld molecule affect CTL recognition and binding of the nucleoprotein peptide from the lymphocytic choriomeningitis virus. Immunogenetics 1994; 40:222-9. [PMID: 7518804 DOI: 10.1007/bf00167083] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
In order to investigate the role of residues inside and outside the peptide binding cleft of the Ld molecule in peptide presentation to cytotoxic T lymphocytes (CTL), we constructed a series of point mutations in the Ld gene. We determined the effects of the mutations in the Ld molecule on the binding and recognition of an Ld-restricted CTL epitope derived from the nucleoprotein (NP) of the lymphocytic choriomeningitis virus (LCMV). Each of the mutations within the Ld peptide binding cleft resulted in a complete loss of CTL recognition. Addition of the LCMV NP peptide to cells expressing these mutants did not increase surface Ld expression, suggesting that the mutations altered peptide binding. Mutations involving pockets D and E within the cleft affected LCMV peptide binding and recognition as drastically as those in pocket B, which was predicted to interact with a main anchor residue of the peptide. In striking contrast, the mutations located outside the cleft did not change either recognition or binding. These results demonstrate that the Ld residues in the peptide binding cleft are the main determinants dictating LCMV NP peptide binding, and that the residues in each of the pockets within the cleft play a role in this interaction. Surprisingly, one mutation outside the peptide binding cleft, T92S, abrogated CTL lysis of target cells treated with the LCMV NP peptide, but not virus-infected cells. These data show that this mutation selectively altered the presentation of the LCMV NP peptide introduced to the cell exogenously, but not endogenously. This implies that the pathway by which peptides associate with class I molecules within the cell differs from that of exogenous peptide binding.
Collapse
Affiliation(s)
- C E Hioe
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill
| | | | | | | |
Collapse
|
31
|
|
32
|
Pharr GT, Bacon LD, Dodgson JB. A class I cDNA from SPAFAS line-11 chickens. EUROPEAN JOURNAL OF IMMUNOGENETICS : OFFICIAL JOURNAL OF THE BRITISH SOCIETY FOR HISTOCOMPATIBILITY AND IMMUNOGENETICS 1994; 21:59-66. [PMID: 9098420 DOI: 10.1111/j.1744-313x.1994.tb00176.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A chicken MHC class I (B-F) cDNA from SPAFAS line 11 embryonic liver tissue was isolated and characterized by nucleotide sequencing. Comparing this sequence with previously described B-F cDNAs highlights clustered nucleotide substitutions in exon 3, encoding amino acids located on the alpha-helical region of the alpha 2 domain.
Collapse
Affiliation(s)
- G T Pharr
- US Department of Agriculture, Avian Disease and Oncology Laboratory, East Lansing, MI, USA
| | | | | |
Collapse
|
33
|
Paul C, Haas JP, Schoenwald U, Truckenbrodt H, Bettinotti MP, Bönisch J, Brünnler G, Keller E, Nevinny-Stickel C, Yao Z. HLA class I/class II interaction in early onset pauciarticular juvenile chronic arthritis. Immunogenetics 1994; 39:61-4. [PMID: 8225439 DOI: 10.1007/bf00171799] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- C Paul
- Immunogenetics Laboratory, University of Munich, Germany
| | | | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Matsui M, Frelinger JA. Restoration of CTL recognition of a mutant FMP peptide by a compensatory change in HLA-A2. Immunogenetics 1994; 40:66-9. [PMID: 8206528 DOI: 10.1007/bf00163966] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- M Matsui
- Department of Microbiology and Immunology, University of North Carolina, Chapel Hill 27599-7290
| | | |
Collapse
|
35
|
Abstract
We have characterized the amino acid sequences of over 20 endogenous peptides bound by a soluble analog of H-2Dd, H-2Dds. Synthetic analogs corresponding to self, viral, tumor, or motif peptides were then tested for their ability to bind to H-2Dd by serologic epitope induction assays using both purified soluble protein and cell surface H-2Dd. The dominant primary sequence motif included glycine at position 2, proline at position 3, and a hydrophobic COOH terminus: leucine, isoleucine, or phenylalanine at position 9 or 10. Ancillary support for high affinity binding was contributed by a positively charged residue at position 5. Three-dimensional computer models of H-2Dds/peptide complexes, based on the crystallographic structure of the human HLA-B27/peptide complex, showed that the basic residue at position 5 was in position to form a salt bridge with aspartic acid at position 156, a polymorphic residue of the H-2Dd heavy (H) chain. Analysis of 28 such models, including 17 based on nonamer self-peptides, revealed considerable variation in the structure of the major histocompatibility complex (MHC) surrounding peptide residue 1, depending on the size and charge of the side chain. Interactions between the side chains of peptide residues 5 and 7, and 6 and 8 commonly occurred. Those peptide positions with limited sequence variability and least solvent accessibility may satisfy structural requirements for high affinity binding of the peptide to the MHC class I H chain, whereas the highly variable positions of the peptide (such as positions 4, 6, and 8) may contribute more to the T cell epitopes.
Collapse
Affiliation(s)
- M Corr
- Molecular Biology Section, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892
| | | | | | | |
Collapse
|
36
|
Sezerman U, Vajda S, Cornette J, DeLisi C. Toward computational determination of peptide-receptor structure. Protein Sci 1993; 2:1827-43. [PMID: 7505681 PMCID: PMC2142284 DOI: 10.1002/pro.5560021105] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
We introduce a method for docking small flexible ligands of the size of dipeptides and phosphocholine and test it against crystallographic complexes. We then show how the method can be used as the basis for a strategy for solving the much more difficult problem of docking fully flexible peptides in the 8-10-residue size range. After developing the method we apply it to peptide-MHC class I systems and find that the predictions are in accord with biological and crystallographic data.
Collapse
Affiliation(s)
- U Sezerman
- Department of Biomedical Engineering, Boston University College of Engineering, Massachusetts 02218
| | | | | | | |
Collapse
|
37
|
Nouri AM, Hussain RF, Dos Santos AV, Mansouri M, Oliver RT. Intensity of class I antigen expression on human tumour cell lines and its relevance to the efficiency of non-MHC-restricted killing. Br J Cancer 1993; 67:1223-8. [PMID: 8512807 PMCID: PMC1968525 DOI: 10.1038/bjc.1993.229] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
A modified tetrazolium reduction assay (MTT) was used to assess the relation between HLA class I antigen expression on tumour cells and their susceptibility as a target for non-MHC restricted LAK/NK cytotoxicity using interleukin-2 activated peripheral blood mononuclear cells (MNC) from normal individuals. At 20/1 effector/target ratio this ranged from no killing to 77%. The efficiency of killing was dependent on duration of effector cell culture with IL-2, peaking at day 10 and declining thereafter. This killing could be enhanced by addition of other cytokines including interferons alpha, beta and gamma. Study of a panel of 15 tumour cell lines using a single effector showed that there was no statistically significant inverse correlation (using Spearman rank test) between the degree of tumour class I expression and LAK/NK killing at 20/1 (r = 0.23 P = 0.39) and 10/1 (r = 0.30, P = 0.27) and at 5/1 E/T ratio r = 0.47, P = 0.08) respectively. Lack of inverse correlation between these two parameters came from study of one bladder tumour line (FEN), whose absent class I antigens had been corrected by transfection with beta 2 microglobulin gene. At high E/T ratio (20/1) there was an increase in the susceptibility of target cells to lysis (36% parent cell, 45% transfected cell), whilst at lower E/T ratios (1/1) there was significantly more killing of the non-transfected cells (10% vs 31%). The addition of anti-class I antibody W6/32 increased killing by 18% but this was non-specific as the same increase occurred with a class II antibody. These data suggest that overall there was not an inverse correlation between class I expression and LAK/NK killing at high E/T ratios, whilst at low (5/1 or lower) E/T ratios this correlation nearly reached statistical significance suggesting that the conflicting literature reports may be due to a threshold levels of effector cells above which the masking effects of MHC antigens disappears.
Collapse
MESH Headings
- Antigens, Neoplasm/physiology
- Cell Death/physiology
- Cytokines/pharmacology
- Histocompatibility Antigens Class I/physiology
- Humans
- Interleukin-2/pharmacology
- Killer Cells, Lymphokine-Activated/drug effects
- Killer Cells, Lymphokine-Activated/immunology
- Killer Cells, Natural/drug effects
- Killer Cells, Natural/immunology
- Major Histocompatibility Complex/physiology
- Neoplasms, Experimental/genetics
- Neoplasms, Experimental/immunology
- Neoplasms, Experimental/pathology
- Stimulation, Chemical
- Tetrazolium Salts
- Thiazoles
- Transfection
- Tumor Cells, Cultured
Collapse
Affiliation(s)
- A M Nouri
- Department of Medical Oncology, Royal London Hospital, Whitechapel, UK
| | | | | | | | | |
Collapse
|
38
|
Gavioli R, Kurilla MG, de Campos-Lima PO, Wallace LE, Dolcetti R, Murray RJ, Rickinson AB, Masucci MG. Multiple HLA A11-restricted cytotoxic T-lymphocyte epitopes of different immunogenicities in the Epstein-Barr virus-encoded nuclear antigen 4. J Virol 1993; 67:1572-8. [PMID: 7679748 PMCID: PMC237528 DOI: 10.1128/jvi.67.3.1572-1578.1993] [Citation(s) in RCA: 135] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Epstein-Barr virus (EBV), a ubiquitous herpesvirus, induces potent HLA class I-restricted cytotoxic T-lymphocyte (CTL) responses. Analyses of target antigen choice have shown that the very strong CTL responses which are often observed through the HLA A11 allele map are due almost entirely to a single transformation-associated EBV protein, the nuclear antigen EBNA4. Here, we sought to determine the number and relative immunogenicities of HLA A11-restricted epitopes within this 938-amino-acid protein. An initial screening with a series of recombinant vaccinia virus vectors encoding progressively truncated forms of EBNA4 was followed by peptide sensitization experiments using overlapping 14- or 15-mers from the entire sequence. These two approaches allowed the identification of five epitope regions located between residues 101 and 115, 416 and 429, 396 and 410, 481 and 495, and 551 and 564 of the EBNA4 molecule. CTL preparations from all seven HLA A11-positive donors tested had demonstrable reactivities against the 416-to-429 peptide, whereas reactivities against the other epitopes either tended to be lost on serial passage or, for some of the donors, were never detected. The immunodominance of the 416-to-429 epitope was further supported by peptide dilution assays using polyclonal effectors and by CTL cloning experiments. Analysis of the 416-to-429 region identified the nanomer 416-424 (IVTDFSVIK) as the cognate peptide. This peptide was able to sensitize targets to lysis by A11-restricted CTL clones at concentrations as low as 5 x 10(-14) M.
Collapse
Affiliation(s)
- R Gavioli
- Department of Tumor Biology, Karolinska Institute, Stockholm, Sweden
| | | | | | | | | | | | | | | |
Collapse
|
39
|
Oh SH, Fleischhauer K, Yang SY. Isoelectric focusing subtypes of HLA-A can be defined by oligonucleotide typing. TISSUE ANTIGENS 1993; 41:135-42. [PMID: 8316944 DOI: 10.1111/j.1399-0039.1993.tb01992.x] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
This study describes a simple and direct method for sequence-specific oligonucleotide probe (SSOP) typing of the A locus of HLA class I genes. Genomic DNA from a panel of over 200 cells which have been characterized by the methods of serology and isoelectric focusing (IEF) for the HLA class I antigens was used for locus-specific PCR amplification of HLA-A sequences. Dot blot hybridization of the amplified products was performed with 28 SSOPs derived from hypervariable regions in exon 2 and 3. Co-amplification of three alleles of HLA-H pseudogene in apparent linkage disequilibrium with HLA-A2 and A10 was observed but did not interfere with the typing of HLA-A alleles. Using short SSOPs (15 nucleotides each) in single temperature tetramethylammonium chloride (TMAC) hybridization and washing steps, 30 IEF-definable isotypes of HLA-A antigens could be unambiguously defined by their hybridization patterns. Moreover, comparison of the typing results with available nucleotide sequences of HLA-A alleles showed that the conditions used allowed faithful detection of single codon mismatches between probe and template. Thus, these alleles can be identified by their unique hybridization patterns generated by the SSOPs. Nucleotide sequence analysis of any new HLA-A allele will further permit its rapid and unambiguous characterization by SSOP typing.
Collapse
Affiliation(s)
- S H Oh
- Laboratory of Biochemical Immunogenetics, Memorial Sloan-Kettering Cancer Center, New York, NY
| | | | | |
Collapse
|
40
|
Sutton J, Rowland-Jones S, Rosenberg W, Nixon D, Gotch F, Gao XM, Murray N, Spoonas A, Driscoll P, Smith M. A sequence pattern for peptides presented to cytotoxic T lymphocytes by HLA B8 revealed by analysis of epitopes and eluted peptides. Eur J Immunol 1993; 23:447-53. [PMID: 7679646 DOI: 10.1002/eji.1830230222] [Citation(s) in RCA: 85] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
HLA B8-restricted cytotoxic T lymphocytes (CTL) specific for influenza A virus were generated and shown to recognize the nucleoprotein (NP). The dominant epitope was mapped using recombinant vaccinia viruses that expressed fragments of the NP and then synthetic peptides based on the NP amino acid sequence. The peptide 380-393 was first identified and further refined; it was shown that the glutamic acid at position 380 was essential for recognition by CTL and that the nonamer 380-388 was the optimum peptide. Six HLA B8-positive influenza immune donors that we have tested respond to this peptide as part of their influenza-specific CTL response. The amino acid sequence of the peptide epitope was compared to six other known virus peptides known to be restricted by HLA B8 and a sequence homology was identified, which predicted nonamer and octamer epitope sequences. Probable anchor residues were identified at peptide residues 3 (lysine/arginine), 5 (lysine/arginine) and 9 (leucine/isoleucine). Support for this pattern came from sequencing peptides eluted from purified HLA B8 molecules, where lysines were predominant at positions 3 and 5. One of the predicted epitope peptides was made and shown to be recognized by specific CTL. These and the two others were shown to compete with NP 380-388 for binding to HLA B8. A model was made of the HLA B8 molecule and negatively charged pockets predicted, which could accommodate the positively charged side chains of the peptide anchor residues.
Collapse
Affiliation(s)
- J Sutton
- Institute of Molecular Medicine, John Radcliffe Hospital, Oxford, GB
| | | | | | | | | | | | | | | | | | | |
Collapse
|
41
|
Matsui M, Hioe CE, Frelinger JA. Roles of the six peptide-binding pockets of the HLA-A2 molecule in allorecognition by human cytotoxic T-cell clones. Proc Natl Acad Sci U S A 1993; 90:674-8. [PMID: 7678462 PMCID: PMC45726 DOI: 10.1073/pnas.90.2.674] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
To evaluate the contribution of the major histocompatibility complex class I pockets to the binding of self-peptides recognized by alloreactive cytotoxic T-lymphocyte (CTL) clones, we have constructed an extensive library of HLA-A2 mutants with different amino acid substitutions in each of the six pockets. When these mutants were tested in cytotoxicity assays with a panel of HLA-A2-specific alloreactive CTL clones, each CTL clone showed a unique pattern of reactivity, implying the different contributions of each pocket to binding individual peptides. We noted that the majority of the mutants in pocket B significantly affect recognition by the CTL clones. Unexpectedly, the mutations influencing allorecognition are found in all other pockets as well. Overall, this study demonstrates that each of the six peptide-binding pockets plays an important and distinct role in binding of self-peptides required for recognition of the HLA-A2 molecule by alloreactive CTLs.
Collapse
Affiliation(s)
- M Matsui
- Department of Microbiology and Immunology, University of North Carolina, Chapel Hill 27599
| | | | | |
Collapse
|
42
|
McMichael AJ. Role of class I molecules of the major histocompatibility complex in cytotoxic T-cell function in health and disease. SPRINGER SEMINARS IN IMMUNOPATHOLOGY 1992; 14:1-16. [PMID: 1440195 DOI: 10.1007/bf00197129] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- A J McMichael
- Institute of Molecular Medicine, John Radcliffe Hospital, Oxford, UK
| |
Collapse
|
43
|
Rötzschke O, Falk K, Stevanović S, Jung G, Rammensee HG. Peptide motifs of closely related HLA class I molecules encompass substantial differences. Eur J Immunol 1992; 22:2453-6. [PMID: 1516632 DOI: 10.1002/eji.1830220940] [Citation(s) in RCA: 62] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The peptides presented by major histocompatibility complex class I molecules adhere to strict rules concerning peptide length and occupancy by certain amino acid residues at anchor positions. Peptides presented by HLA-A*0201 molecules, for example, are generally nonapeptides requiring Leu or Met at position 2 and an aliphatic residue, predominantly Val, at position 9. A closely related molecule, HLA-A*0205, differing from the former at four amino acid residues, has a related but substantially different peptide motif. A*0205-presented peptides are still nonapeptides, and position 9 is still aliphatic, although it is preferentially occupied by Leu instead of Val. Position 2 not only allows aliphatic residues but also polar ones. Occupancy at position 6, considered as an auxiliary anchor in A*0201, as well as non-anchor residues at positions 3, 4, and 8 are relatively well conserved between the two peptide motifs. Thus, although a number of the T cell epitopes presented by the two HLA-A2 forms is expected to be identical, a considerable number of epitopes should be different.
Collapse
Affiliation(s)
- O Rötzschke
- Max-Planck-Institut für Biologie, Abteilung Immunogenetik, Tübingen, FRG
| | | | | | | | | |
Collapse
|
44
|
Latron F, Pazmany L, Morrison J, Moots R, Saper MA, McMichael A, Strominger JL. A critical role for conserved residues in the cleft of HLA-A2 in presentation of a nonapeptide to T cells. Science 1992; 257:964-7. [PMID: 1380181 DOI: 10.1126/science.1380181] [Citation(s) in RCA: 60] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The peptide binding cleft of the class I human histocompatibility antigen, HLA-A2, contains conserved amino acid residues clustered in the two ends of the cleft in pockets A and F as well as polymorphic residues. The function of two conserved tyrosines in the A pocket was investigated by mutating them to phenylalanines and of a conserved tyrosine and threonine in the F pocket by mutating them to phenylalanine and valine, respectively. Presentation of influenza virus peptides and of intact virus to cytolytic T lymphocytes (CTLs) was then examined. The magnitude of the reduction seen by the mutation of the two tyrosines in the A pocket suggests that hydrogen bonds involving them have a critical function in the binding of the NH2-terminal NH3+ of the peptide nonamer and possibly of all bound peptide nonamers. In contrast, the mutations in the F pocket had no effect on CTL recognition.
Collapse
Affiliation(s)
- F Latron
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115
| | | | | | | | | | | | | |
Collapse
|
45
|
Plata F. Implications of HIV-specific cytotoxic T lymphocytes in AIDS. BIOTHERAPY (DORDRECHT, NETHERLANDS) 1992; 5:31-45. [PMID: 1389901 DOI: 10.1007/bf02194784] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The immune response to HIV in infected humans leads to the production of HIV-specific cytotoxic T lymphocytes (CTL) which circulate in high frequencies. The presence of these CTL and their eventual protective activities have been studied by various laboratories, and correlations have been made with certain immunopathological manifestations of HIV infections. It seems probable that HIV-immune CTL participate in the induction of certain disorders by initiating inflammatory reactions in the lungs, central nervous system, and lymph nodes. Various virus antigens recognized by HIV-immune CTL on the surface of the infected cell have been identified, and the molecular definition of the epitopes recognized is well under way. Likewise, numerous HLA transplantation antigens that regulate HIV antigen recognition by CTL have been identified. These data are discussed in view of the development of an eventual vaccine and of functional immunotherapies. They are compared with results obtained in animal experimental systems.
Collapse
Affiliation(s)
- F Plata
- Laboratoire de Biologie et d'Immunologie Moléculaires des Rétrovirus, Institut Pasteur, Paris, France
| |
Collapse
|
46
|
Abstract
A new two-step procedure has been developed for the docking of flexible oligopeptide chains of unknown conformation to static proteins of known structure. In the first step positions and conformations are sampled and the association energy minimized starting from an approximate preselected docking position. The resulting conformations are further optimized in the second step by a Metropolis Monte Carlo minimization, which optimizes each of these structures. The method has been tested on the HIV-1 aspartic proteinase complex with an inhibitor, whose crystallographic structure is known at 2.3 A resolution. Furthermore, the application of this method to the docking of the hendecapeptide 58-68 of the influenza A virus matrix protein to the HLA-A2 molecule produced results which are in agreement with experimental observations in identifying side chains critical for T cell recognition and residues responsible of MHC protein binding.
Collapse
Affiliation(s)
- A Caflisch
- Institute of Biomedical Engineering and Medical Informatics, University of Zürich, Switzerland
| | | | | |
Collapse
|
47
|
Moots RJ, Samberg NL, Pazmany L, Frelinger JA, McMichael AJ, Stauss HJ. A cross-species functional interaction between the murine major histocompatibility complex class I alpha 3 domain and human CD8 revealed by peptide-specific cytotoxic T lymphocytes. Eur J Immunol 1992; 22:1643-6. [PMID: 1601046 DOI: 10.1002/eji.1830220645] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The monomorphic cell surface glycoprotein CD8 acts as co-receptor in the recognition of peptide-major histocompatibility complex (MHC) class I complexes by cytotoxic lymphocytes (CTL) by binding to the monomorphic alpha 3 domain of the class I molecule. Positions 227 and 245 in the class I alpha 3 domain appear to be especially important for this interaction. Recent reports suggest there is no interspecies recognition between CD8 and MHC class I. In this study, hybrid genes from human class I HLA-A0201 and murine class I H-2Kb were transfected into human and mouse cells and tested in Cr-release assays using HLA-A0201-restricted influenza A matrix peptide-specific CTL as effectors. Transfected cells expressing chimeric genes comprising the alpha 1 and alpha 2 domains from HLA-A0201 together with the H-2Kb alpha 3 domain were lysed as effectively as wild-type HLA-A0201 and in both cases, killing was blocked by anti-CD8 antibody equally well. These results indicate that human CD8 can interact with the alpha 3 domain of murine class I to the same level as human class I.
Collapse
Affiliation(s)
- R J Moots
- Institute of Molecular Medicine, John Radcliffe Hospital, Headington, London, GB
| | | | | | | | | | | |
Collapse
|
48
|
Morrison J, Elvin J, Latron F, Gotch F, Moots R, Strominger JL, McMichael A. Identification of the nonamer peptide from influenza A matrix protein and the role of pockets of HLA-A2 in its recognition by cytotoxic T lymphocytes. Eur J Immunol 1992; 22:903-7. [PMID: 1372560 DOI: 10.1002/eji.1830220404] [Citation(s) in RCA: 90] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Influenza matrix peptide 58-66 is shown to be the optimal nonamer for binding to HLA-A2 and presentation to cytotoxic T lymphocytes (CTL). If titered out to 2 x 10(-10) - 4 x 10(-10) M in CTL-mediated lysis assays and to 3 x 10(-9) M in an HLA-A2 assembly-stabilization assay in cell lysates. The peptide was shown to make probable contacts with its carboxy terminus close to residue 116 in the floor of the cleft of HLA-A2, close to the F pocket. The side chain of the amino-terminal amino acid was unimportant, but its free amino and carbonyl groups in the A pocket appeared important in optimizing peptide presentation. The B pocket probably accommodates the side chain of residue 2 (isoleucine) and was shown to be critical in peptide presentation.
Collapse
Affiliation(s)
- J Morrison
- Institute of Molecular Medicine, John Radcliffe Hospital, Oxford, GB
| | | | | | | | | | | | | |
Collapse
|
49
|
Yewdell JW, Bennink JR. Cell biology of antigen processing and presentation to major histocompatibility complex class I molecule-restricted T lymphocytes. Adv Immunol 1992; 52:1-123. [PMID: 1442305 DOI: 10.1016/s0065-2776(08)60875-5] [Citation(s) in RCA: 282] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- J W Yewdell
- Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892
| | | |
Collapse
|
50
|
Affiliation(s)
- A McMichael
- Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, England
| |
Collapse
|