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Role of class I human leukocyte antigen molecules in early steps of echovirus infection of rhabdomyosarcoma cells. Virology 2008; 381:203-14. [PMID: 18823925 DOI: 10.1016/j.virol.2008.08.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2008] [Revised: 06/23/2008] [Accepted: 08/04/2008] [Indexed: 11/20/2022]
Abstract
Several echoviruses use decay accelerating factor (DAF) as a cell surface receptor. However, most of them require additional cell surface coreceptors. We investigated the respective roles of DAF and class I human leukocyte antigen (HLA) molecules in the early steps of the echovirus 11 (EV11) lifecycle in rhabdomyosarcoma (RD) cells. EV11 infection was inhibited at an early stage by anti-beta2-microglobulin (beta2m) and anti-HLA monoclonal antibodies and by a soluble monochain HLA class I molecule. Expression of class I HLA molecules restored the early steps of the EV11 lifecycle, but its expression was not sufficient for EV11 replication and particle production. Expression of HLA class I molecules was associated with leukocyte cell line permissiveness to EV11 infection. In conclusion, HLA class I molecules are involved in the early steps of EV11 infection of RD cells and appear to participate in a complex interplay of surface molecules acting as coreceptors, including DAF.
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2
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Kimura K, Kawamura T, Kadotani S, Inada H, Niihira S, Yamano T. Peptide-specific cytotoxicity of T lymphocytes against glutamic acid decarboxylase and insulin in type 1 diabetes mellitus. Diabetes Res Clin Pract 2001; 51:173-9. [PMID: 11269889 DOI: 10.1016/s0168-8227(00)00225-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Cytotoxic T lymphocytes (CTL) against pancreatic beta-cells probably play a major role in the etiology of type 1 diabetes mellitus (DM). CTLs recognize a complex formed between MHC class I and antigenic peptides fragments derived from intracellular processing of proteins. However, the exogenous peptides, which show strong affinities to MHC class I, can be presented. In this study, we focused on the cytotoxic activity of peripheral lymphocytes in patients with type 1 DM against the peptides of glutamic acid decarboxylase (GAD) and insulin, which can bind MHC class 1 A24. Lymphocytes were isolated from peripheral blood of 12 type 1 DM patients and eight healthy control subjects. The effector cells were cultured with peptides, IL-2 and IL-7, restimulated weekly by autologous antigen presenting cells, which were cultured with IL-4 and GM-CSF. On day 21, CTL activities of cultured effector cells were tested against autologous EB-blast cells as target cells pulsed with the stimulating peptides using 51Cr release assay. The results showed that cytotoxicity against insulin peptide binding to MHC class I A24 was observed in lymphocytes of four out of ten patients with type 1 DM. The mean cytotoxicity was 46.0% of the maximum release. The antibody against HLA-class I inhibited this effect. Cytotoxicity against GAD peptide which bind MHC class I A24 was not observed in seven patients. None of healthy controls showed cytotoxicity against GAD or insulin peptides was observed. This is the first report describing the cytotoxic activity of CD8+ T lymphocytes against insulin in type 1 DM.
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Affiliation(s)
- K Kimura
- Department of Pediatrics, Osaka City University Graduate School of Medicine, 1-5-7, Asahi-machi, Abeno-ku, Osaka 545-8585, Japan
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Dulphy N, Peyrat MA, Tieng V, Douay C, Rabian C, Tamouza R, Laoussadi S, Berenbaum F, Chabot A, Bonneville M, Charron D, Toubert A. Common Intra-Articular T Cell Expansions in Patients with Reactive Arthritis: Identical β-Chain Junctional Sequences and Cytotoxicity Toward HLA-B27. THE JOURNAL OF IMMUNOLOGY 1999. [DOI: 10.4049/jimmunol.162.7.3830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Spondyloarthropathies constitute a group of autoimmune diseases of special interest because of their tight association with the MHC class I molecule HLA-B27 and the bacterial triggering of some clinical forms called reactive arthritis (ReA). One current hypothesis is the presentation by HLA-B27 of a so-called arthritogenic peptide to T cells. To better focus on the relevant T cell populations within the joint, we performed an extensive β-chain T cell repertoire analysis of synovial fluid compared with PBL in seven patients, four of whom were characterized as having ReA triggered by Yersinia enterocolitica, Chlamydia trachomatis, or Shigella sonnei. Analysis of the size diversity of the β-chain complementarity-determining region 3 (CDR3) allowed us to evaluate the degree of T cell clonality in the samples. Oligoclonal T cell expansions were frequently observed in the joint. In one patient, CDR3 amino acid sequences of major expansions using two different BV genes were identical. One dominant T cell expansion and several CDR3 amino acid sequences were identical in two different patients. Furthermore, one sequence was identical with a sequence reported independently in a Salmonella-induced ReA patient. Together, these data indicate a surprisingly high degree of conservation in the T cell responses in recent-onset ReA triggered by different micro-organisms. A CD8+ synovial line expressing shared clonotypes was established and reacted toward several B*2705 lymphoblastoid cell lines, therefore supporting a molecular mimicry phenomenon at the T cell level in the disease mechanism.
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Affiliation(s)
- Nicolas Dulphy
- *Laboratoire d’Immunologie et d’Histocompatibilité, Institut National de la Santé et de la Recherche Médicale, Unit 396, Université Paris VII, Centre G. Hayem, Hôpital Saint-Louis, Paris, France
| | - Marie-Alix Peyrat
- †Institut National de la Santé et de la Recherche Médicale, Unit 463, Institut de Biologie, Nantes, France
| | - Vannary Tieng
- *Laboratoire d’Immunologie et d’Histocompatibilité, Institut National de la Santé et de la Recherche Médicale, Unit 396, Université Paris VII, Centre G. Hayem, Hôpital Saint-Louis, Paris, France
| | - Corinne Douay
- *Laboratoire d’Immunologie et d’Histocompatibilité, Institut National de la Santé et de la Recherche Médicale, Unit 396, Université Paris VII, Centre G. Hayem, Hôpital Saint-Louis, Paris, France
| | - Claire Rabian
- *Laboratoire d’Immunologie et d’Histocompatibilité, Institut National de la Santé et de la Recherche Médicale, Unit 396, Université Paris VII, Centre G. Hayem, Hôpital Saint-Louis, Paris, France
| | - Ryad Tamouza
- *Laboratoire d’Immunologie et d’Histocompatibilité, Institut National de la Santé et de la Recherche Médicale, Unit 396, Université Paris VII, Centre G. Hayem, Hôpital Saint-Louis, Paris, France
| | | | - Francis Berenbaum
- §Service de Rhumatologie, Hôpital Saint-Antoine, Paris, France; and
| | - Agnes Chabot
- ¶Service de Rhumatologie A, Hôpital Lariboisière, Paris, France
| | - Marc Bonneville
- †Institut National de la Santé et de la Recherche Médicale, Unit 463, Institut de Biologie, Nantes, France
| | - Dominique Charron
- *Laboratoire d’Immunologie et d’Histocompatibilité, Institut National de la Santé et de la Recherche Médicale, Unit 396, Université Paris VII, Centre G. Hayem, Hôpital Saint-Louis, Paris, France
| | - Antoine Toubert
- *Laboratoire d’Immunologie et d’Histocompatibilité, Institut National de la Santé et de la Recherche Médicale, Unit 396, Université Paris VII, Centre G. Hayem, Hôpital Saint-Louis, Paris, France
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Wölpl A, Toubert A, Siemoneit K, Eiermann TH, Neumayer H, Goldmann SF. Characterization of two human IgM monoclonal antibodies reactive with HLA-B27. TISSUE ANTIGENS 1995; 46:305-12. [PMID: 8560449 DOI: 10.1111/j.1399-0039.1995.tb02497.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
We describe here the generation and characterization of two human monoclonal IgM antibodies (UL-4F11 and UL-F6) reactive with HLA-B27. The monoclonal antibody (mAb) UL-4F11 is cytotoxic for peripheral mononuclear cells and, therefore, useful as typing reagent for HLA-B27 and HLA-B38. Protein chemistry showed that the mAb UL-4F11 precipitates HLA-B27 molecules. Epitope mapping analysis suggests that the amino acids 45, 67, 82 and 83 (alpha-1 domain) of the HLA-B27 sequence are necessary for mAb UL-4F11 reactivity. The mAb UL-F6 is suitable for complement dependent lysis of lymphoblastoid cell lines and stimulated peripheral blood mononuclear cells with HLA-B27 (B*2701, B*2702, B*2703, B*2705, B*2707), B13, B40 (60,61), B47 and B48 specificities. Its reactivity indicates that the amino acid valine in position 152 and glutamic acid in position 163 of the alpha-2 domain are crucial for the binding epitope.
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Affiliation(s)
- A Wölpl
- Department of Transfusion Medicine, University of Ulm, Germany
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Maier R, Falk K, Rötzschke O, Maier B, Gnau V, Stevanović S, Jung G, Rammensee HG, Meyerhans A. Peptide motifs of HLA-A3, -A24, and -B7 molecules as determined by pool sequencing. Immunogenetics 1994; 40:306-8. [PMID: 7521860 DOI: 10.1007/bf00189978] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- R Maier
- Abeilung Virologie, Institute für Medizinische Mikrobiologie und Hygiene, Universität Freiburg, Germany
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Ulbrecht M, Kellermann J, Johnson JP, Weiss EH. Impaired intracellular transport and cell surface expression of nonpolymorphic HLA-E: evidence for inefficient peptide binding. J Exp Med 1992; 176:1083-90. [PMID: 1402654 PMCID: PMC2119380 DOI: 10.1084/jem.176.4.1083] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The assembly of the classical, polymorphic major histocompatibility complex class I molecules in the endoplasmic reticulum requires the presence of peptide ligands and beta 2-microglobulin (beta 2m). Formation of this trimolecular complex is a prerequisite for efficient transport to the cell surface, where presented peptides are scanned by T lymphocytes. The function of the other class I molecules is in dispute. The human, nonclassical class I gene, HLA-E, was found to be ubiquitously transcribed, whereas cell surface expression was difficult to detect upon transfection. Pulse chase experiments revealed that the HLA-E heavy chain in transfectants, obtained with the murine myeloma cell line P3X63-Ag8.653 (X63), displays a significant reduction in oligosaccharide maturation and intracellular transport compared with HLA-B27 in corresponding transfectants. The accordingly low HLA-E cell surface expression could be significantly enhanced by either reducing the culture temperature or by supplementing the medium with human beta 2m, suggesting inefficient binding of endogenous peptides to HLA-E. To analyze whether HLA-E binds peptides and to identify the corresponding ligands, fractions of acid-extracted material from HLA-E/X63 transfectants were separated by reverse phase HPLC and were tested for their ability to enhance HLA-E cell surface expression. Two fractions specifically increased the HLA class I expression on the HLA-E transfectant clone.
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Affiliation(s)
- M Ulbrecht
- Institut für Immunologie, Ludwig-Maximilians-Universität München, Germany
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Gillet AC, Pérarnau B, Mercier P, Lemonnier FA. Serological analysis of the dissociation process of HLA-B and C class I molecules. Eur J Immunol 1990; 20:759-64. [PMID: 2189736 DOI: 10.1002/eji.1830200408] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Two forms of HLA class I molecules reacting differentially with the HC-10 monoclonal antibody were identified at the surface of HLA-A3, B7, Cw3 or Cw7 human cells. The HC-10-nonreactive form (which includes all HLA-A3 and a large fraction of HLA-B7, Cw3 and or Cw7 molecules) corresponds to heavy chains apparently tightly associated to beta 2-microglobulin. The HC-10-reactive form (which represents only a fraction of cell surface expressed HLA-B7, Cw3 and Cw7 molecules) corresponds to heavy chains loosely but still associated to beta 2-microglobulin. Further biochemical analyses and the study of mouse transfected cells expressing other HLA class I specificities led to the following conclusions: (a) dissociation of HLA-B and C molecules is a multistep phenomenon, the various stages being identifiable serologically; (b) acquisition of the HC-10 antigenic determinant appears as a hallmark of HLA class I molecules engaged in the process of dissociation; however, its expression does not imply complete separation of heavy and light chains; (c) only the initial stage of the dissociation process can be identified on cell surfaces, whereas (d) following addition of detergent, dissociation of HLA-B and C molecules spontaneously proceeds further, resulting in accumulation in cell lysate of cell surface-derived isolated HLA-B and C class I heavy chains.
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Affiliation(s)
- A C Gillet
- Centre d'Immunologie INSERM-CNRS de Marseille-Luminy, France
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8
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Mierau R, Robinson PJ, Sanderson AR, Genth E, Cramer M. Antigenic determinants shared between HLA-A, -B, -C antigens and H-2 class I molecules modified by bovine beta-2 microglobulin. Immunogenetics 1987; 26:351-5. [PMID: 2444534 DOI: 10.1007/bf00343703] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The specificity of the mouse class I-specific antibody COB6-3 was examined in detail. It was found to react with the mouse class I molecules H-2Db, Kd, and Qa-2, and with human HLA-A, -B, -C antigens. The specificity pattern of COB6-3, despite its different origin, was similar to that of the monomorphic HLA class I-specific antibody W6/32. Cross-inhibition studies show that on human cells the antigenic determinants recognized by the two antibodies are situated close together and may be identical. On mouse cells, reactivity of both antibodies was generated upon replacement of mouse beta-2 microglobulin (B2m) with its bovine counterpart, but differences in specificity were observed using human B2m.
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Affiliation(s)
- R Mierau
- Rheumaforschungsinstitut, Rheumaklinik Aachen, Federal Republic of Germany
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Schmidt H, Forsthuber T, Bühring HJ, Müller CA. Differential expression of the HLA-B7 and the HLA-A2 gene in transfected mouse L(tk-) cells after stimulation by mouse interferon. Immunobiology 1987; 174:51-66. [PMID: 3494666 DOI: 10.1016/s0171-2985(87)80084-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Mouse L(tk-) cells were transfected with recombinant genomic clones encoding the human major histocompatibility antigens HLA-A2 or HLA-B7. The exposure of 15 different transfected cell clones to mouse interferon resulted in an up to 2.9-fold enhancement of the HLA-A2 antigen at the cell surface but in an up to 5.5-fold enhancement of the HLA-B7 antigen as shown by quantitative radioimmunoassay with monoclonal antibodies directed against different HLA epitopes. Using the HLA-Bw6 specific monoclonal antibody 2BC4, an even higher increase of the HLA-B7 antigen (up to 12-fold) could be observed. This higher inducibility of an HLA-B versus HLA-A locus gene may reflect distinct regulatory mechanism controlling the expression of HLA class I subregion antigens.
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Forman J. Determinants on major histocompatibility complex class I molecules recognized by cytotoxic T lymphocytes. Adv Immunol 1987; 41:135-79. [PMID: 2446478 DOI: 10.1016/s0065-2776(08)60031-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- J Forman
- Department of Microbiology, University of Texas Health Science Center at Dallas 75235
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11
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Ferrier P, Kahn-Perles B, Layet C, Pontarotti P, Sire J, Hakem R, Le Bouteiller P, Toubert A, Perarnau B, Roudier J. Serological and structural analysis of HLA class I molecules: beta 2-microglobulin interacts with the two external domains of the HLA class I heavy chain. ANNALES DE L'INSTITUT PASTEUR. IMMUNOLOGY 1987; 138:19-35. [PMID: 2437937 DOI: 10.1016/s0769-2625(87)80093-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The serological reactivities of HLA class I molecules were studied in relation to structural modifications of these molecules, including shuffling of external exons and exchange of human beta 2-microglobulin for beta 2-microglobulin from different species. Two major clusters (I and II) of monomorphic and polymorphic antigenic determinants could be delineated. beta 2-Microglobulin participates in the formation of the two clusters, indicating that the light chain interacts tightly with the two external domains of the HLA class I heavy chain. However, external molecules can modify these interactions and alter the antigenic structure of the overall molecule. Thus, fixation on HLA class I molecules of the Fab fragment of a monoclonal antibody directed at antigenic determinants associated with cluster II resulted in enhanced fixation of a monoclonal antibody (B10.6) related to cluster I. The structural and functional implications of these results are discussed.
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12
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Sodoyer R, Kahn-Perles B, Strachan T, Sire J, Santoni MJ, Layet C, Ferrier P, Jordan BR, Lemonnier FA. Transfection of murine LMTK- cells with purified HLA class I genes. VII. Association of allele- and locus-specific serological reactivities with respectively the first and second domains of the HLA-B7 molecule. Immunogenetics 1986; 23:246-51. [PMID: 2422117 DOI: 10.1007/bf00373019] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The individual contributions of the first two external domains of the HLA-B7 heavy chain to the expression of allele-specific (B7) and locus-specific (B and C) antigenic determinants were investigated using hybrid class I genes. Hybrid genes were constructed in vitro by exon shuffling between the parent genes HLA-B7, HLA-Cw3, HLA-A3, and H-2Kd, and their expression was monitored following transfection into mouse L cells. The results show that most allele-specific antigenic determinants are associated with the first external domain of the B7 heavy chain, whereas all the locus-specific antigenic determinants tested map to the second external domain.
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13
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Maryanski JL, Moretta A, Jordan B, De Plaen E, Van Pel A, Boon T, Cerottini JC. Human T cell recognition of cloned HLA class I gene products expressed on DNA transfectants of mouse mastocytoma P815. Eur J Immunol 1985; 15:1111-7. [PMID: 2933264 DOI: 10.1002/eji.1830151109] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Cloned genes for human major histocompatibility complex (MHC) class I antigens were introduced by DNA-mediated gene transfer into a high-efficiency transfection recipient (HTR) cell line previously derived from mouse mastocytoma P815. Cell surface expression of HLA-A3, AW24 and CW3 gene products on P815 transfectants was demonstrated by radioimmune assay and by flow cytometry. The human MHC class I gene products were apparently expressed on P815 transfectants in a form recognized by human cytolytic T lymphocytes (CTL). Human CTL generated in unidirectional mixed lymphocyte culture against AW24+ donor lymphocytes clearly lysed P815-HLA-AW24+ transfectant target cells, but not untransfected P815(HTR) controls. Moreover, P815-HLA transfectants could stimulate in vitro a significant alloreactive human CTL response. Lysis of P815-HLA transfectant target cells by human CTL was inhibited by a monoclonal antibody directed against human MHC class I gene products. These mouse cell transfectants may be useful for the study of human T cell responses.
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Le Bouteiller PP, N'Guyen C, Lemonnier FA, Jordan BR, Caillol D, Mishal Z. Analysis of the expression of cloned HLA class I genes in mouse transfected L cells by quantitative flow cytometry. CYTOMETRY 1985; 6:414-21. [PMID: 4042783 DOI: 10.1002/cyto.990060505] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
By using a calibrated cell sorter and monoclonal antibodies conjugated to fluorochromes, a quantitative analysis of the levels of expression of HLA class I molecules at the surface of cloned murine L cells transfected with purified A3, B7, or CW3 genes was performed and compared with radioimmunoassay data. We selected clones of heterogeneous levels of HLA class I expression, which were shown to remain constant over a period of 4 mo in absence of HAT selection and not to be correlated to the DNA copy number of the corresponding integrated gene.
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15
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Paul P, Lepage V, Sayagh B, Metzger JJ, Pla M, Boumsell L, Douay C, Cohen D, Colombani J, Dausset J. Serological expression after sequential double transfection with purified HLA-A11 gene of mouse fibroblasts carrying human beta-2 microglobulin. Immunogenetics 1985; 22:1-8. [PMID: 3894226 DOI: 10.1007/bf00430589] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A genomic cosmid library constructed from DNA from a genotyped individual (JF = HLA-A11, Cw-, B38/A26, Cw7, B51) was screened for clones containing class I histocompatibility genes. Among these clones, one was found to carry a 4.8 kb Hind III fragment which is highly correlated with HLA-A11. This clone was used to transfect LMTK+ cultured mouse fibroblast transformants expressing human beta-2 microglobulin. The human beta-2 microglobulin heavy chain-associated determinant was positively detected by the M18 monoclonal antibody. HLA-A11 expression on these doubly transformed cells was specifically demonstrated by complement-dependent cytotoxicity with HLA-A11 + A3-specific but not with HLA-A3-specific monoclonal antibodies. Absorption studies with human alloantisera confirmed the presence on these cells of HLA-A11 determinants and of cross-reacting determinants which absorbed anti-HLA-A1 and -A3 alloantisera. The JF5-J27 transfected cell expressed both heavy and light chains of human class I histocompatibility genes.
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16
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N'Guyen C, Sodoyer R, Trucy J, Strachan T, Jordan BR. The HLA-AW24 gene: sequence, surroundings and comparison with the HLA-A2 and HLA-A3 genes. Immunogenetics 1985; 21:479-89. [PMID: 2987115 DOI: 10.1007/bf00430931] [Citation(s) in RCA: 77] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A cosmid clone containing two class I sequences was found to cause expression of the HLA-AW24 protein after transfection into mouse L cells. The restriction map of this cosmid shows extensive homology over 26 kb with the map of the HLA-A3 region obtained from cosmids of the same library, constructed with DNA from an HLA-A3/HLA-AW24 heterozygote, but diverges over the remaining 14 kb. The HLA-AW24 gene was subcloned from this cosmid and its nucleotide sequence was determined. Amino acid and, more strikingly, nucleotide sequence comparisons with other HLA alleles indicate that the A locus alleles are more closely related to each other than to alleles from other HLA loci. A very skewed distribution of silent substitutions is apparent, and the occurrence of clustered multiple substitutions hints at gene-conversion-like events.
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17
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Sodoyer R, Nguyen C, Strachan T, Santoni MJ, Damotte M, Trucy J, Jordan BR. Allelism in the HLA class I multigene family. ANNALES DE L'INSTITUT PASTEUR. IMMUNOLOGIE 1985; 136C:71-84. [PMID: 2986517 DOI: 10.1016/s0769-2625(85)80040-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Recent data on the structure of functional HLA class I genes shows that, at least at the HLA-A locus, the allelic genes are more related to each other than to HLA genes from other loci. This "A-ness" is discernible at the protein sequence level but much more evident when nucleotide sequences are compared; the homology is particularly striking in the 3' non-coding region. Genes coding for the same HLA specificity in different genetic backgrounds show no obvious difference, although in one case the 3' flanking regions are clearly different; the restriction maps around the HLA-A3 and HLA-AW24 genes are also compared to see whether the chromosomal environments of these two genes are recognizably similar.
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Layet C, Delovitch T, Ferrier P, Caillol DH, Jordan BR, Lemonnier FA. Expression of an HLA-Bw6-related specificity by the HLA-Cw3 molecule. Immunogenetics 1985; 21:469-78. [PMID: 2581891 DOI: 10.1007/bf00430930] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Radioimmunoassay of HLA-transformed mouse L cells expressing A3, A24, B7, or Cw3 HLA class I molecules with a set of monomorphic monoclonal antibodies distinguishes between A3-A24 and B7-Cw3 patterns of reactivity. Analyses with Bw6-specific monoclonal antibodies and a human alloantiserum demonstrate the expression by the HLA-Cw3 molecules of a Bw6 public specificity related to but not identical with that expressed by the HLA-B7 molecules. Exon-shuffling experiments and inhibition studies of monoclonal antibody cell-surface fixation indicate that similar parts of B7 and Cw3 molecules account for their serological cross-reactivity.
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