1
|
Egami Y, Narushima Y, Ohshima M, Yoshida A, Yoneta N, Masaki Y, Itoh K. Human recombinant Fab fragment from combinatorial libraries of a B-cell lymphoma patient recognizes core protein of chondroitin sulphate proteoglycan 4. J Biochem 2018; 163:61-68. [PMID: 29036679 DOI: 10.1093/jb/mvx065] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Accepted: 08/22/2017] [Indexed: 11/12/2022] Open
Abstract
CD antigens are well known as therapeutic targets of B-cell lymphoma. To isolate therapeutic antibodies that recognize novel targets other than CD antigens, we constructed a phage display combinatorial antibody Fab library from bone marrow lymphocytes of B-cell lymphoma patient. To eliminate antibodies reactive with known B-cell lymphoma antigen, non-hematopoietic and patient's sera reactive HeLaS3 cells was selected as a target of whole cell panning. Five rounds of panning against live HeLaS3 cells retrieved single Fab clone, termed AHSA (Antibody to HeLa Surface Antigen). Using phage display random peptide library, LSYLEP was identified as an epitope sequence of AHSA. LC-MS/MS analysis of AHSA-precipitated HeLaS3 cell lysates detected several fragments corresponding to the sequence of chondroitin sulphate proteoglycan 4 (CSPG4) core protein. Since LSYLEP sequence was at the position of 313-318 of CSPG4, we considered that CSPG4 was AHSA-associated antigen. Double staining of CSPG4-postive MDA-MB-435S cells with AHSA and anti-CSPG4 rabbit antibody showed identical staining position, and reduced AHSA reactivity was observed in CSPG4-siRNA treated MDA-MB-435S cells. In conclusion, we retrieved a human Fab from antibody library of B-cell lymphoma patient, and identified CSPG4 as a recognizing antigen. AHSA may have potential benefits for development of CSPG4-targeting theranostics for B-cell lymphoma.
Collapse
Affiliation(s)
- Yoko Egami
- Department of Clinical Pharmacology & Genetics, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Yuta Narushima
- Department of Clinical Pharmacology & Genetics, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Motohiro Ohshima
- Department of Clinical Pharmacology & Genetics, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Akira Yoshida
- Department of Clinical Pharmacology & Genetics, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Naruki Yoneta
- Department of Clinical Pharmacology & Genetics, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Yasufumi Masaki
- Division of Hematology and Immunology, Department of Internal Medicine, Kanazawa Medical University, 1-1 Daigaku, Uchinada-machi, Kahoku-gun, Ishikawa 920-0293, Japan
| | - Kunihiko Itoh
- Department of Clinical Pharmacology & Genetics, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| |
Collapse
|
2
|
CD98 signals controlling tumorigenesis. Int J Biochem Cell Biol 2016; 81:148-150. [PMID: 27840151 DOI: 10.1016/j.biocel.2016.11.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Revised: 11/07/2016] [Accepted: 11/09/2016] [Indexed: 11/23/2022]
Abstract
CD98 is implicated in a large number of cancers. CD98 regulates amino acid transport and integrin signaling, which are key drivers in tumor progression. The light chain in the CD98 heterodimer functions as an amino acid exchanger. Alongside the light chain, the heavy chain forms a heterocomplex at the plasma membrane to mediate signaling pathways. In this article, we review various approaches to blocking CD98 activity, which may lead to novel opportunities in cancer therapeutics.
Collapse
|
3
|
Li WZ, Wang J, Long R, Su GH, Bukhory DK, Dai J, Jin N, Huang SY, Jia P, Li T, Fan C, Liu K, Wang Z. Novel antibody against a glutamic acid-rich human fibrinogen-like protein 2-derived peptide near Ser91 inhibits hfgl2 prothrombinase activity. PLoS One 2014; 9:e94551. [PMID: 24728278 PMCID: PMC3984148 DOI: 10.1371/journal.pone.0094551] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2013] [Accepted: 03/17/2014] [Indexed: 12/11/2022] Open
Abstract
Fibrinogen-like protein 2 (fgl2) is highly expressed in microvascular endothelial cells in diseases associated with microcirculatory disturbances and plays a crucial role in microthrombosis. Previous studies have demonstrated that the Ser89 residue is a critical site for mouse fgl2 prothrombinase activity. The aim of this study was to investigate the prothrombinase inhibitory ability of antibodies against an hfgl2-derived peptide. The peptide was termed NPG-12 because it is located at the N-terminus of membrane-bound hfgl2, contains 12 amino acid residues (corresponding to residues 76 to 87), and is rich in Glu. This peptide was selected as an antigenic determinant to produce antibodies in immunized rabbits using the DNAStar and HomoloGene software program. Abundant hfgl2 expression was induced in human umbilical vein endothelial cells through treatment with TNF-α. The generated anti-NPG-12 antibodies specifically recognize fgl2, as determined by ELISA, Western Blot and immunostaining. Moreover, one-stage clotting and thrombin generation tests provide evidence that the antibodies can reduce the hfgl2 prothrombinase activity without affecting the platelet-poor plasma prothrombin time (PT) or the activated partial thromboplastin time (APTT). In addition, the antibodies exerted undetectable influence on the proliferation or activation of bulk T cell populations. In conclusion, the selected peptide sequence NPG-12 may be a critical domain for hfgl2 prothrombinase activity, and the development of inhibitors against this sequence may be promising for research or management of hfgl2-associated microcirculatory disturbances.
Collapse
Affiliation(s)
- Wen-Zhu Li
- Department of Cardiology, Institute of Cardiovascular Disease, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jue Wang
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Rui Long
- Department of Geriatrics, Institute of Geriatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Guan-Hua Su
- Department of Cardiology, Institute of Cardiovascular Disease, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Dinesh-Kumar Bukhory
- Department of Cardiology, Institute of Cardiovascular Disease, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jing Dai
- Department of Geriatrics, Institute of Geriatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Nan Jin
- Department of Geriatrics, Institute of Geriatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shi-Yuan Huang
- Department of Cardiology, Institute of Cardiovascular Disease, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Peng Jia
- Department of Cardiology, Institute of Cardiovascular Disease, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ting Li
- Department of Cardiology, Institute of Cardiovascular Disease, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chen Fan
- Department of Cardiology, Institute of Cardiovascular Disease, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Kun Liu
- Department of Cardiology, Institute of Cardiovascular Disease, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhaohui Wang
- Department of Geriatrics, Institute of Geriatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| |
Collapse
|
4
|
Saito M, Kondo M, Ohshima M, Deguchi K, Hayashi H, Inoue K, Tsuji D, Masuko T, Itoh K. Identification of anti-CD98 antibody mimotopes for inducing antibodies with antitumor activity by mimotope immunization. Cancer Sci 2014; 105:396-401. [PMID: 24484217 PMCID: PMC4317797 DOI: 10.1111/cas.12365] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2013] [Revised: 01/17/2014] [Accepted: 01/27/2014] [Indexed: 11/28/2022] Open
Abstract
A mimotope is an antibody-epitope-mimicking peptide retrieved from a phage display random peptide library. Immunization with antitumor antibody-derived mimotopes is promising for inducing antitumor immunity in hosts. In this study, we isolated linear and constrained mimotopes from HBJ127, a tumor-suppressing anti-CD98 heavy chain mAb, and determined their abilities for induction of antitumor activity equal to that of the parent antibody. We detected elevated levels of antipeptide responses, but failed to detect reactivity against native CD98-expressing HeLa cells in sera of immunized mice. Phage display panning and selection of mimotope-immunized mouse spleen-derived antibody Fab library showed that HeLa cell-reactive Fabs were successfully retrieved from the library. This finding indicates that native antigen-reactive Fab clones represented an undetectable minor population in mimotope-induced antibody repertoire. Functional and structural analysis of retrieved Fab clones revealed that they were almost identical to the parent antibody. From these results, we confirmed that mimotope immunization was promising for retrieving antitumor antibodies equivalent to the parent antibody, although the co-administration of adjuvant compounds such as T-cell epitope peptides and Toll-like receptor 4 agonist peptides is likely to be necessary for inducing stronger antitumor immunity than mimotope injection alone.
Collapse
Affiliation(s)
- Misa Saito
- Department of Clinical Pharmacology and Genetics, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
5
|
Hara K, Ueda S, Ohno Y, Tanaka T, Yagi H, Okazaki S, Kawahara R, Masayuki T, Enomoto T, Hashimoto Y, Masuko K, Masuko T. NIH3T3 cells overexpressing CD98 heavy chain resist early G1 arrest and apoptosis induced by serum starvation. Cancer Sci 2012; 103:1460-6. [PMID: 22497681 DOI: 10.1111/j.1349-7006.2012.02304.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2012] [Revised: 04/05/2012] [Accepted: 04/06/2012] [Indexed: 12/28/2022] Open
Abstract
CD98 is a heterodimeric glycoprotein of 125-kDa, which consists of a 90-kDa heavy chain (hc) subunit and 35-kDa to 55-kDa light chain (lc) subunits. It is strongly expressed on the surface of proliferating normal cells and almost all tumor cells. To investigate the participation of CD98 in cellular proliferation and malignant transformation, we analyzed cell-cycle progression of NIH3T3 clones transfected with cDNA of human CD98hc. Although NIH3T3 and control transfectant cells grown to the subconfluent state were arrested in the G0/G1 phase by serum starvation, considerable portions of CD98hc-transfected cells resided at S and G2/M phases. Under serum-starved and confluent conditions, significant fractions (20-25%) of NIH3T3 and control transfectant cells contained less than 2n content DNA, indicating occurrence of apoptosis, whereas no apoptotic cells were detected in CD98hc-transfectant cells. Under serum-starved conditions, a marked increase in the levels of cyclin D1 and cyclin E and a decrease in p16 were observed in CD98hc-transfectant cells. The reverse was true for NIH3T3 and control transfectant cells. Our results suggest that resistance to G1 arrest and apoptosis by CD98 overexpression are associated with high G1-cyclins and low p16 levels.
Collapse
Affiliation(s)
- Kaori Hara
- Molecular Cell Biology Laboratory, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
6
|
Masuko K, Okazaki S, Satoh M, Tanaka G, Ikeda T, Torii R, Ueda E, Nakano T, Danbayashi M, Tsuruoka T, Ohno Y, Yagi H, Yabe N, Yoshida H, Tahara T, Kataoka S, Oshino T, Shindo T, Niwa SI, Ishimoto T, Baba H, Hashimoto Y, Saya H, Masuko T. Anti-tumor effect against human cancer xenografts by a fully human monoclonal antibody to a variant 8-epitope of CD44R1 expressed on cancer stem cells. PLoS One 2012; 7:e29728. [PMID: 22272243 PMCID: PMC3260170 DOI: 10.1371/journal.pone.0029728] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2011] [Accepted: 12/02/2011] [Indexed: 12/18/2022] Open
Abstract
Background CD44 is a major cellular receptor for hyaluronic acids. The stem structure of CD44 encoded by ten normal exons can be enlarged by ten variant exons (v1-v10) by alternative splicing. We have succeeded in preparing MV5 fully human IgM and its class-switched GV5 IgG monoclonal antibody (mAb) recognizing the extracellular domain of a CD44R1 isoform that contains the inserted region coded by variant (v8, v9 and v10) exons and is expressed on the surface of various human epithelial cancer cells. Methods and Principal Findings We demonstrated the growth inhibition of human cancer xenografts by a GV5 IgG mAb reshaped from an MV5 IgM. The epitope recognized by MV5 and GV5 was identified to a v8-coding region by the analysis of mAb binding to various recombinant CD44 proteins by enzyme-linked immunosorbent assay. GV5 showed preferential reactivity against various malignant human cells versus normal human cells assessed by flow cytometry and immunohistological analysis. When ME180 human uterine cervix carcinoma cells were subcutaneously inoculated to athymic mice with GV5, significant inhibition of tumor formation was observed. Furthermore, intraperitoneal injections of GV5markedly inhibited the growth of visible established tumors from HSC-3 human larynx carcinoma cells that had been subcutaneously transplanted one week before the first treatment with GV5. From in vitro experiments, antibody-dependent cellular cytotoxicity and internalization of CD44R1 seemed to be possible mechanisms for in vivo anti-tumor activity by GV5. Conclusions CD44R1 is an excellent molecular target for mAb therapy of cancer, possibly superior to molecules targeted by existing therapeutic mAb, such as Trastuzumab and Cetuximab recognizing human epidermal growth factor receptor family.
Collapse
Affiliation(s)
- Kazue Masuko
- Cell Biology Laboratory, Department of Pharmaceutical Sciences, School of Pharmacy, Kinki University, Higashiosaka-shi, Osaka, Japan
| | - Shogo Okazaki
- Cell Biology Laboratory, Department of Pharmaceutical Sciences, School of Pharmacy, Kinki University, Higashiosaka-shi, Osaka, Japan
| | - Mayumi Satoh
- Cell Biology Laboratory, Department of Pharmaceutical Sciences, School of Pharmacy, Kinki University, Higashiosaka-shi, Osaka, Japan
| | - Goh Tanaka
- Cell Biology Laboratory, Department of Pharmaceutical Sciences, School of Pharmacy, Kinki University, Higashiosaka-shi, Osaka, Japan
| | - Tatsuya Ikeda
- Cell Biology Laboratory, Department of Pharmaceutical Sciences, School of Pharmacy, Kinki University, Higashiosaka-shi, Osaka, Japan
| | - Ryota Torii
- Cell Biology Laboratory, Department of Pharmaceutical Sciences, School of Pharmacy, Kinki University, Higashiosaka-shi, Osaka, Japan
| | - Eri Ueda
- Cell Biology Laboratory, Department of Pharmaceutical Sciences, School of Pharmacy, Kinki University, Higashiosaka-shi, Osaka, Japan
| | - Takashi Nakano
- Cell Biology Laboratory, Department of Pharmaceutical Sciences, School of Pharmacy, Kinki University, Higashiosaka-shi, Osaka, Japan
| | - Masaaki Danbayashi
- Cell Biology Laboratory, Department of Pharmaceutical Sciences, School of Pharmacy, Kinki University, Higashiosaka-shi, Osaka, Japan
| | - Tomoyo Tsuruoka
- Cell Biology Laboratory, Department of Pharmaceutical Sciences, School of Pharmacy, Kinki University, Higashiosaka-shi, Osaka, Japan
| | - Yoshiya Ohno
- Cell Biology Laboratory, Department of Pharmaceutical Sciences, School of Pharmacy, Kinki University, Higashiosaka-shi, Osaka, Japan
| | - Hideki Yagi
- Cell Biology Laboratory, Department of Pharmaceutical Sciences, School of Pharmacy, Kinki University, Higashiosaka-shi, Osaka, Japan
| | | | | | | | - Shiro Kataoka
- Kyowa Hakko Kirin Co., Ltd., Chiyoda-ku, Tokyo, Japan
| | | | | | | | - Takatsugu Ishimoto
- Department of Gastroenterological Surgery, Graduate School of Medical Science, Kumamoto University, Honjo, Kumamoto, Japan
| | - Hideo Baba
- Department of Gastroenterological Surgery, Graduate School of Medical Science, Kumamoto University, Honjo, Kumamoto, Japan
| | | | - Hideyuki Saya
- Division of Gene Regulation, Institute for Advanced Medical Research, School of Medicine, Keio University, Shinjuku-ku, Tokyo, Japan
| | - Takashi Masuko
- Cell Biology Laboratory, Department of Pharmaceutical Sciences, School of Pharmacy, Kinki University, Higashiosaka-shi, Osaka, Japan
- Pharmaceutical Research and Technology Institute, Kinki University, Higashiosaka-shi, Osaka, Japan
- * E-mail:
| |
Collapse
|
7
|
Ohkawa M, Ohno Y, Masuko K, Takeuchi A, Suda K, Kubo A, Kawahara R, Okazaki S, Tanaka T, Saya H, Seki M, Enomoto T, Yagi H, Hashimoto Y, Masuko T. Oncogenicity of L-type amino-acid transporter 1 (LAT1) revealed by targeted gene disruption in chicken DT40 cells: LAT1 is a promising molecular target for human cancer therapy. Biochem Biophys Res Commun 2011; 406:649-55. [DOI: 10.1016/j.bbrc.2011.02.135] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2011] [Accepted: 02/25/2011] [Indexed: 11/17/2022]
|
8
|
Masuko T, Ohno Y, Masuko K, Yagi H, Uejima S, Takechi M, Hashimoto Y. Towards therapeutic antibodies to membrane oncoproteins by a robust strategy using rats immunized with transfectants expressing target molecules fused to green fluorescent protein. Cancer Sci 2010; 102:25-35. [PMID: 21040216 DOI: 10.1111/j.1349-7006.2010.01741.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Cell-surface molecules containing growth factor receptors, adhesion molecules and transporter proteins are often over-expressed in various cancer cells, and could be regarded as suitable targets for therapeutic monoclonal antibodies (mAb). Anti-cancer therapeutic mAb are claimed to bind these cell-surface molecules on viable cancer cells: therefore, it is necessary to produce mAb recognizing epitopes on the extracellular domains of native but not denatured proteins. We have experienced difficulty in obtaining mAb bound to viable cancer cells using synthetic peptides or recombinant proteins produced in bacteria as immunogens, although these immunogens are relatively easy to prepare. In this context, we have concluded that viable cancer cells or cells transfected with cDNA encoding target proteins are suitable immunogens for the production of anti-cancer therapeutic mAb. Furthermore, we selected rats as the immunized animals, because of their excellent capacity to generate diverse antibodies. Because many target candidates are multi-pass (type IV) membrane proteins, such as 7-pass G protein-coupled receptors and 12-pass transporter proteins belonging to the solute carrier family, and their possible immunogenic extracellular regions are very small, production of specific mAb was extremely difficult. In this review, we summarize the successful preparation and characterization of rat mAb immunized against the extracellular domain of type I, type II and type IV membrane oncoproteins fused to green fluorescent protein as an approach using reverse genetics, and also introduce the discovery of cell-death-inducing antibodies as an approach using forward genetics and a strategy to produce reshaped antibodies using mimotope peptides as the immunogen.
Collapse
Affiliation(s)
- Takashi Masuko
- Cell Biology Laboratory, Department of Pharmaceutical Sciences, School of Pharmacy, Kinki University, Osaka, Japan.
| | | | | | | | | | | | | |
Collapse
|
9
|
Generation of Fab fragment-like molecular recognition proteins against staphylococcal enterotoxin B by phage display technology. CLINICAL AND VACCINE IMMUNOLOGY : CVI 2010; 17:1708-17. [PMID: 20844088 DOI: 10.1128/cvi.00229-10] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Antigen-binding fragments (Fab fragments) and single-chain variable fragments (scFv) against staphylococcal enterotoxin B (SEB) were produced by phage display technology. SEB epitopes were first identified by phage display approach using the commercial anti-SEB monoclonal antibody ab53981 as the target. Heptamer and dodecamer mimotope peptides recognized by ab53981 were screened from Ph.D-7 or Ph.D-12 random peptide phage libraries expressed in Escherichia coli. The isolated 7-mer and 12-mer mimotopes were shown to share a sequence homologous to ⁸PDELHK¹⁴S in the amino acid sequence of SEB. The N-terminal 15-mer peptide of SEB was determined to be an epitope of ab53981. After immunization of mice with maltose-binding protein-tagged N-terminal 15-mer peptide, a phage display Fab library was constructed using cDNA prepared from the mRNAs of spleen cells. Three phage clones displaying the Fab molecule which recognized SEB were isolated through three rounds of panning. Only one of them produced a soluble Fab fragment from the transformed cells, and the fragment fused with a histidine tag sequence was produced in E. coli cells and converted into scFv. Surface plasmon resonance analysis showed that the dissociation constants of these proteins with SEB were (4.1 ± 1.1) × 10⁻⁹ M and (8.4 ± 2.3) × 10⁻¹⁰ M, respectively. The produced molecule was applied to the determination of SEB by enzyme-linked immunosorbent assay and Western blot analysis.
Collapse
|
10
|
Dam-Tuxen R, Riise E. Antibodies against a class II HLA-peptide complex raised by active immunization of mice with antigen mimicking peptides. Scand J Immunol 2009; 70:93-100. [PMID: 19630914 DOI: 10.1111/j.1365-3083.2009.02275.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Multiple sclerosis (MS) is an autoimmune disease linked to the human leucocyte antigen (HLA) class II genes DRB1*1501, DRB5*0101 and DQB1*0602. T cells reactive towards the DRB1*1501 in complex with various peptides derived from myelin basic protein (MBP), which is the major component of myelin, have been found in the peripheral blood of MS patients. These autoreactive T cells are believed to play a role in the pathogenesis of MS. In this article, antibodies against the HLA complex DR2b (DRA1*0101/DRB1*1501) in complex with the MBP-derived peptide MBP(85-99) have been generated by immunization of NMRI mice with three different antigen mimicking peptides displayed on M13 bacteriophages. The peptides mimick the epitope of a monoclonal antibody specific for the DR2b-MBP(85-99) complex. The mice developed IgG antibodies not only against the peptides injected, but they also developed antibodies against the DR2b complex and specific antibodies against the DR2b-MBP(85-99) complex. These data open up the possibility of designing antigen mimicking peptides for vaccination against MS.
Collapse
Affiliation(s)
- R Dam-Tuxen
- Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen OE, Denmark
| | | |
Collapse
|