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Guo J, Yang L, Song H, Bai L. Prevention of bleomycin-induced pulmonary fibrosis by vaccination with the Tocilizumab mimotope. Hum Vaccin Immunother 2024; 20:2319965. [PMID: 38408907 PMCID: PMC10900270 DOI: 10.1080/21645515.2024.2319965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 02/14/2024] [Indexed: 02/28/2024] Open
Abstract
Mimotope, a kind of peptide vaccine, is developed to bind natural receptor and inhibit the downstream signaling. We have demonstrated that the vaccination of Tocilizumab mimotopes could alleviate the renal fibrosis by interfering with both IL-6 and ferroptosis signaling. However, the effect of the vaccination of Tocilizumab mimotopes on the fibroblast was not investigated in previous study. Thus, we sought to explore the changes in the fibroblast induced by the Tocilizumab mimotopes vaccination. Bleomycin instillation was performed to construct the pulmonary fibrosis model after the immunization of Tocilizumab mimotopes. Lung histological analysis showed that the Tocilizumab mimotopes could significantly reduce the maladaptive repairment and abnormal remodeling. Immunoblotting assay and fluorescence staining showed that Immunization with the Tocilizumab mimotopes reduces the accumulation of fibrosis-related proteins. High level of lipid peroxidation product was observed in the animal model, while the Tocilizumab mimotopes vaccination could reduce the generation of lipid peroxidation product. Mechanism analysis further showed that Nrf-2 signaling, but not GPX-4 and FSP-1 signaling, was upregulated, and reduced the lipid peroxidation. Our results revealed that in the BLM-induced pulmonary fibrosis, high level of lipid peroxidation product was significantly accumulation in the lung tissues, which might lead to the occurrence of ferroptosis. The IL-6 pathway block therapy could inhibit lipid peroxidation product generation in the lung tissues by upregulating the Nrf-2 signaling, and further alleviate the pulmonary fibrosis.
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Affiliation(s)
- Jin Guo
- Department of Cardiorespiratory Rehabilitation, Shanghai Yangzhi Rehabilitation Hospital (Shanghai Sunshine Rehabilitation Center), School of Medicine, Tongji University, Shanghai, China
| | - Lin Yang
- Department of Nephrology, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China
| | - Haoming Song
- Department of Cardiology, Tongji Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Li Bai
- The Central Lab, The First Affiliated Hospital of Baotou Medical College (Inner Mongolia Autoimmune Key Laboratory), Baotou, China
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2
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Ji W, Liu R, Wu S, Ma H, Wu Z, Liu W, Hou S. Screening of Deoxynivalenol Cyclic Heptapeptide Mimotope Antigen. Stud Health Technol Inform 2023; 308:225-230. [PMID: 38007744 DOI: 10.3233/shti230843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2023]
Abstract
In this study, phage clones that can bind to DON were selected from the phage cyclohepta peptide library by screening through the principle of solid-phase affinity, and mimotope were synthesized to replace the DON toxin standard to establish a green low toxicity detection system. The author conducted four rounds of screening in the phage cyclic heptapeptide library with DON-10a1a monoclonal antibody as the target molecule. Then 38 phage clones were selected and validated, and the results showed that 35 of them could bind to the DON-10a1a monoclonal antibody and were inhibited by DON toxin. Finally, the DNA was extracted and sequenced to obtain 6 different DNA sequences, which were named D1-D6 respectively. The peptides synthesized according to the corresponding amino acid sequences can replace DON toxin to establish a series of green and low toxicity assays.
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Affiliation(s)
- Wenhui Ji
- Department of Life Sciences, Jiangxi Science & Technology Normal University, Nanchang, 330013, China
| | - Renrong Liu
- Department of Life Sciences, Jiangxi Science & Technology Normal University, Nanchang, 330013, China
| | - Shanshan Wu
- Department of Life Sciences, Jiangxi Science & Technology Normal University, Nanchang, 330013, China
| | - Hailing Ma
- Department of Life Sciences, Jiangxi Science & Technology Normal University, Nanchang, 330013, China
| | - Ziyao Wu
- Department of Life Sciences, Jiangxi Science & Technology Normal University, Nanchang, 330013, China
| | - Wenjing Liu
- Department of Life Sciences, Jiangxi Science & Technology Normal University, Nanchang, 330013, China
| | - Shumin Hou
- Department of Life Sciences, Jiangxi Science & Technology Normal University, Nanchang, 330013, China
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3
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Canon N, Schein CH, Braun W, Negi SS, Chen X, Kulis MD, Kim EH, Pathy V, Pozzoli M, Liu W, Dreskin SC. Alanine Scanning of the Unstructured Region of Ara h 2 and of a Related Mimotope Reveals Critical Amino Acids for IgE Binding. Mol Nutr Food Res 2023; 67:e2300134. [PMID: 37706599 PMCID: PMC10840829 DOI: 10.1002/mnfr.202300134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 07/26/2023] [Indexed: 09/15/2023]
Abstract
SCOPE The unstructured region of Ara h 2, referred to as epitope 3, contains a repeated motif, DYPSh (h = hydroxyproline) that is important for IgE binding. METHODS AND RESULTS IgE binding assays to 20mer and shorter peptides of epitope 3, defines a 16mer core sequence containing one copy of the DPYSh motif, DEDSYERDPYShSQDP. This study performs alanine scanning of this and a related 12mer mimotope, LLDPYAhRAWTK. IgE binding, using a pool of 10 sera and with individual sera, is greatly reduced when alanine is substituted for aspartate at position 8 (D8; p < 0.01), tyrosine at position 10 (Y10; p < 0.01), and hydroxyproline at position 12 (h12; p < 0.001). IgE binding to alanine-substituted peptides of a mimotope containing the DPY_h motif confirm the critical importance of Y (p < 0.01) and h (p < 0.01), but not D. Molecular modeling of the core and mimotope suggests an h-dependent conformational basis for the recognition of these sequences by polyclonal IgE. CONCLUSIONS IgE from pooled sera and individual sera differentially bound amino acids throughout the sequences of Epitope 3 and its mimotope, with Y10 and h12 being most important for all sera. These results are highly significant for designing hypoallergenic forms of Ara h 2.
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Affiliation(s)
- Nicole Canon
- Division of Allergy and Immunology, Kelsey-Seybold Clinic, Houston, TX
| | - Catherine H. Schein
- Institute for Human Infections and Immunity (IHII), The University of Texas Medical Branch, Galveston, TX
- Sealy Center for Structural Biology and Molecular Biophysics, The University of Texas Medical Branch, Galveston, TX
| | - Werner Braun
- Sealy Center for Structural Biology and Molecular Biophysics, The University of Texas Medical Branch, Galveston, TX
- Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, Galveston, TX
| | - Surendra S. Negi
- Sealy Center for Structural Biology and Molecular Biophysics, The University of Texas Medical Branch, Galveston, TX
- Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, Galveston, TX
| | - Xueni Chen
- Division of Allergy and Clinical Immunology, Department of Medicine, University of Colorado Denver, Aurora, CO
| | - Michael D. Kulis
- Division of Pediatric Allergy and Immunology, University of North Carolina School of Medicine, Chapel Hill, NC
| | - Edwin H. Kim
- Division of Pediatric Allergy and Immunology, University of North Carolina School of Medicine, Chapel Hill, NC
| | - Vidya Pathy
- Division of Allergy and Clinical Immunology, Department of Medicine, University of Colorado Denver, Aurora, CO
| | - Marina Pozzoli
- Division of Allergy and Clinical Immunology, Department of Medicine, University of Colorado Denver, Aurora, CO
| | - Weimin Liu
- Division of Allergy and Clinical Immunology, Department of Medicine, University of Colorado Denver, Aurora, CO
| | - Stephen C. Dreskin
- Division of Allergy and Clinical Immunology, Department of Medicine, University of Colorado Denver, Aurora, CO
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Cuevas-Juárez E, Liñan-Torres A, Hernández C, Kopylov M, Potter CS, Carragher B, Ramírez OT, Palomares LA. Mimotope discovery as a tool to design a vaccine against Zika and dengue viruses. Biotechnol Bioeng 2023; 120:2658-2671. [PMID: 37058415 DOI: 10.1002/bit.28392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 03/18/2023] [Accepted: 03/20/2023] [Indexed: 04/15/2023]
Abstract
Vaccine development against dengue virus is challenging because of the antibody-dependent enhancement of infection (ADE), which causes severe disease. Consecutive infections by Zika (ZIKV) and/or dengue viruses (DENV), or vaccination can predispose to ADE. Current vaccines and vaccine candidates contain the complete envelope viral protein, with epitopes that can raise antibodies causing ADE. We used the envelope dimer epitope (EDE), which induces neutralizing antibodies that do not elicit ADE, to design a vaccine against both flaviviruses. However, EDE is a discontinuous quaternary epitope that cannot be isolated from the E protein without other epitopes. Utilizing phage display, we selected three peptides that mimic the EDE. Free mimotopes were disordered and did not elicit an immune response. After their display on adeno-associated virus (AAV) capsids (VLP), they recovered their structure and were recognized by an EDE-specific antibody. Characterization by cryo-EM and enzyme-linked immunosorbent assay confirmed the correct display of a mimotope on the surface of the AAV VLP and its recognition by the specific antibody. Immunization with the AAV VLP displaying one of the mimotopes induced antibodies that recognized ZIKV and DENV. This work provides the basis for developing a Zika and dengue virus vaccine candidate that will not induce ADE.
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Affiliation(s)
- Esmeralda Cuevas-Juárez
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Morelos, Mexico
| | - Arturo Liñan-Torres
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Morelos, Mexico
| | - Carolina Hernández
- National Center for In-situ Tomographic Ultramicroscopy, Simons Electron Microscopy Center, New York Structural Biology Center, New York, New York, USA
| | - Mykhailo Kopylov
- National Center for In-situ Tomographic Ultramicroscopy, Simons Electron Microscopy Center, New York Structural Biology Center, New York, New York, USA
| | - Clint S Potter
- National Center for In-situ Tomographic Ultramicroscopy, Simons Electron Microscopy Center, New York Structural Biology Center, New York, New York, USA
| | - Bridget Carragher
- National Center for In-situ Tomographic Ultramicroscopy, Simons Electron Microscopy Center, New York Structural Biology Center, New York, New York, USA
| | - Octavio T Ramírez
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Morelos, Mexico
| | - Laura A Palomares
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Morelos, Mexico
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Li H, Yang M, Song H, Sun M, Zhou H, Fu J, Zhou D, Bai W, Chen B, Lai M, Kang H, Wei S. ACT001 Relieves NMOSD Symptoms by Reducing Astrocyte Damage with an Autoimmune Antibody. Molecules 2023; 28:molecules28031412. [PMID: 36771078 PMCID: PMC9918908 DOI: 10.3390/molecules28031412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2022] [Revised: 01/18/2023] [Accepted: 01/24/2023] [Indexed: 02/05/2023] Open
Abstract
Neuromyelitis optica spectrum disorder (NMOSD) is a central nervous system inflammatory demyelinating disease, the pathogenesis of which involves autoantibodies targeting the extracellular epitopes of aquaporin-4 on astrocytes. We neutralized the AQP4-IgG from NMOSD patient sera using synthesized AQP4 extracellular epitope peptides and found that the severe cytotoxicity produced by aquaporin-4 immunoglobin (AQP4-IgG) could be blocked by AQP4 extracellular mimotope peptides of Loop A and Loop C in astrocyte protection and animal models. ACT001, a natural compound derivative, has shown anti-tumor activity in various cancers. In our study, the central nervous system anti-inflammatory effect of ACT001 was investigated. The results demonstrated the superior astrocyte protection activity of ACT001 at 10 µM. Furthermore, ACT001 decreases the behavioral score in the mouse NMOSD model, which was not inferior to Methylprednisolone Sodium Succinate, the first-line therapy of NMOSD in clinical practice. In summary, our study showed that astrocytes are protected by specific peptides, or small molecular drugs, which is a new strategy for the treatment of NMOSD. It is possible for ACT001 to be a promising therapy for NMOSD.
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Affiliation(s)
- Hongen Li
- Department of Ophthalmology, The Chinese People’s Liberation Army General Hospital & The Chinese People’s Liberation Army Medical School, Beijing 100853, China
| | - Mo Yang
- Department of Neuro-Ophthalmology, Eye Hospital, China Academy of Chinese Medical Sciences, Beijing 100091, China
| | - Honglu Song
- Department of Ophthalmology, The Chinese People’s Liberation Army General Hospital & The Chinese People’s Liberation Army Medical School, Beijing 100853, China
- Department of Ophthalmology, The 980th Hospital of the Chinese PLA Joint Logistics Support Force, Shijiazhuang 050082, China
| | - Mingming Sun
- Department of Ophthalmology, The Chinese People’s Liberation Army General Hospital & The Chinese People’s Liberation Army Medical School, Beijing 100853, China
| | - Huanfen Zhou
- Department of Ophthalmology, The Chinese People’s Liberation Army General Hospital & The Chinese People’s Liberation Army Medical School, Beijing 100853, China
| | - Junxia Fu
- Department of Ophthalmology, The Chinese People’s Liberation Army General Hospital & The Chinese People’s Liberation Army Medical School, Beijing 100853, China
| | - Di Zhou
- Department of Ophthalmology, The Chinese People’s Liberation Army General Hospital & The Chinese People’s Liberation Army Medical School, Beijing 100853, China
| | - Wenhao Bai
- Department of Ophthalmology, The Chinese People’s Liberation Army General Hospital & The Chinese People’s Liberation Army Medical School, Beijing 100853, China
| | - Biyue Chen
- Department of Ophthalmology, The Chinese People’s Liberation Army General Hospital & The Chinese People’s Liberation Army Medical School, Beijing 100853, China
| | - Mengying Lai
- Department of Ophthalmology, The Chinese People’s Liberation Army General Hospital & The Chinese People’s Liberation Army Medical School, Beijing 100853, China
- Department of Public Health and Preventive Medicine, Shantou University Medical College, Shantou 515041, China
| | - Hao Kang
- Department of Ophthalmology, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
- Correspondence: (H.K.); (S.W.)
| | - Shihui Wei
- Department of Ophthalmology, The Chinese People’s Liberation Army General Hospital & The Chinese People’s Liberation Army Medical School, Beijing 100853, China
- Correspondence: (H.K.); (S.W.)
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6
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Pashov A, Murali R, Makhoul I, Karbassi B, Kieber-Emmons T. Harnessing Antibody Polyspecificity for Cancer Immunotherapy. Monoclon Antib Immunodiagn Immunother 2022; 41:290-300. [PMID: 36306515 DOI: 10.1089/mab.2022.0025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Targeting the diverse glycan repertoire expressed on tumor cells is considered a viable therapeutic strategy to deal with tumor cell heterogeneity. Inherently polyspecific, natural, glycan-reactive antibodies are purported to be protective in thwarting infections and in cancer immunotherapy. Tumor-associated carbohydrate antigens (TACAs) are related to pathogen glycans, to which nascent or natural antibodies exist and IgM responses are elicited. To capture the polyspecific nature of anticarbohydrate responses, we have focused on the rational design of carbohydrate mimetic peptides (CMPs) cross-reactive with TACA reactive antibodies. In particular, we have focused on the development of CMPs that display reactivity to GD2 and Lewis Y (LeY) reactive monoclonal antibodies. They would serve as templates for pan-immunogens inducing biosimilar polyreactive antibodies. In the design, we relied on structural analyses of CMP's enhanced binding to the templates using molecular modeling. Glycan reactivity patterns of affinity CMP-purified human antibodies further refined specificity profiles in comparison with the immune response to the CMP in clinical trials. In this study, we further define the molecular characteristics for this mimicry by considering the polyspecificity of LeY and GD2 reactive antibodies binding to the lacto-ceramide core Galβ(1,4)Glcβ(1-1')Cer. Binding to this minimum building block can be capitalized on for cancer therapy and diagnostics and illustrates a new approach in designing cancer vaccines taking advantage of the latent polyspecificity of antibodies and the relevance of natural antibodies in antigen discovery and design.
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Affiliation(s)
- Anastas Pashov
- Department of Immunology, Stephan Angelov Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Ramachandran Murali
- Research Division of Immunology, Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Issam Makhoul
- Department of Medicine and Pathology, Winthrop P. Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Behjatolah Karbassi
- Department of Medicine and Pathology, Winthrop P. Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Thomas Kieber-Emmons
- Department of Medicine and Pathology, Winthrop P. Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
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7
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Huang DT, Fu HJ, Huang JJ, Luo L, Lei HT, Shen YD, Chen ZJ, Wang H, Xu ZL. Mimotope-Based Immunoassays for the Rapid Analysis of Mycotoxin: A Review. J Agric Food Chem 2021; 69:11743-11752. [PMID: 34583509 DOI: 10.1021/acs.jafc.1c04169] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Mycotoxins are toxic contaminants in foods and feeds that are naturally occurring and largely unavoidable. Determining their contents in these products is essential to protect humans from harm. Immunoassays of mycotoxins have been well-established because they are fast, sensitive, simple, and cost-effective. However, a major limitation of immunoassays is the requirement of toxic mycotoxins as competing antigens, standards, or competing tracers. Mimotopes are peptides or proteins that can specifically bind to antibodies and compete with analytes for binding sites by mimicking antigenic epitopes. They can be employed as substitutes for competing antigens, standards, or competing tracers to avoid use of mycotoxins. This review summarizes the production and functionalization of the two main kinds of mimotopes, mimic peptides and anti-idiotypic antibodies (Ab2), and their applications in rapid analysis of mycotoxins.
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Affiliation(s)
- Dan-Tong Huang
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Laboratory of Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Hui-Jun Fu
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Laboratory of Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Jia-Jia Huang
- Guangdong Food and Drug Vocational College, Guangzhou 510665, China
| | - Lin Luo
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Laboratory of Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Hong-Tao Lei
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Laboratory of Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Yu-Dong Shen
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Laboratory of Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Zi-Jian Chen
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Laboratory of Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Hong Wang
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Laboratory of Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Zhen-Lin Xu
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Laboratory of Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China
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Zhou J, Li J, Li Y, Liu H, Qi Y, Wang A. Identification of a mimotope of an infectious bronchitis virus S1 protein. J Vet Sci 2021; 22:e49. [PMID: 34170090 PMCID: PMC8318793 DOI: 10.4142/jvs.2021.22.e49] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 09/14/2020] [Accepted: 10/07/2020] [Indexed: 11/20/2022] Open
Abstract
The S1 protein of the infectious bronchitis virus (IBV) is a major structural protein that induces the production of the virus-neutralization antibodies. The monoclonal antibody against the IBV M41 S1 protein was used as a target for biopanning. After three rounds of biopanning, randomly selected phages bound to the monoclonal antibody. Sequence analysis showed that the dominant sequence was SFYDFEMQGFFI. Indirect competitive enzyme-linked immunosorbent assay showed that SFYDFEMQGFFI is a mimotope of the S1 protein that was predicted by PepSurf. The mimotope may provide information for further structural and functional analyses of the S1 protein.
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Affiliation(s)
- Jingming Zhou
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China
| | - Jianan Li
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China
| | - Yanghui Li
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China
| | - Hongliang Liu
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China
| | - Yanhua Qi
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China
| | - Aiping Wang
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China.
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Flegel WA, Srivastava K. When recombinant proteins can replace rare red cells in immunohematology workups. Transfusion 2021; 61:2204-2212. [PMID: 34060094 DOI: 10.1111/trf.16507] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 05/14/2021] [Accepted: 05/16/2021] [Indexed: 12/26/2022]
Affiliation(s)
- Willy A Flegel
- Department of Transfusion Medicine, NIH Clinical Center, National Institutes of Health, Bethesda, Maryland, USA
| | - Kshitij Srivastava
- Department of Transfusion Medicine, NIH Clinical Center, National Institutes of Health, Bethesda, Maryland, USA
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10
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Torreggiani E, Bononi I, Pietrobon S, Mazzoni E, Guerra G, Feo C, Martini F, Tognon M. Colorectal Carcinoma Affected Patients Are Significantly Poor Responders Against the Oncogenic JC Polyomavirus. Front Immunol 2021; 12:632129. [PMID: 34113338 PMCID: PMC8185217 DOI: 10.3389/fimmu.2021.632129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Accepted: 05/07/2021] [Indexed: 12/24/2022] Open
Abstract
Background Many investigations reported the association between human tumors and JCPyV, a polyomavirus with oncogenic potential. The association has been supported by studies that found JCPyV footprints in CRC and gliomas of different types. Indeed, JCPyV footprints including its nucleic acids and Tag oncoprotein have been revealed in CRC tissues. Methods Herein, sera from colorectal carcinoma (CRC) affected patients and healthy individuals (HS), employed as control, were analysed for immunoglobulin G (IgG) antibodies against specific JCPyV viral capsid protein 1 (VP1) antigens. The investigation was carried out employing an innovative immunological assay. Indeed, an indirect enzyme-linked immunosorbent assay (ELISA) with JCPyV VP1 mimotopes was used. JCPyV VP1 mimotopes consisted of synthetic peptides mimicking VP1 epitopes. Results Sera from CRC affected patients, evaluated using indirect ELISAs with synthetic mimotopes, showed a significant lower prevalence of IgG antibodies against JCPyV VP1 mimotopes (26%) compared to HS (51%), p<0.005. These data were confirmed by another method, the hemagglutination inhibition (HAI) assay. Altogether these results, i.e. the prevalence of serum IgG antibodies against JCPyV VP1 mimotopes from patients with CRC is approximately 50% lower than in HS, are of interest. Discussion Our data suggest that patients with CRC are significantly poor responders against JCPyV VP1 antigens. It is possible that CRC patients are affected by a specific immunological deregulation. This immunological dysfunction, revelled in CRC patients, may account for their predisposition to the colorectal carcinoma onset.
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Affiliation(s)
- Elena Torreggiani
- Department of Medical Sciences, School of Medicine, University of Ferrara, Ferrara, Italy
| | - Ilaria Bononi
- Department of Translational Medicine, School of Medicine, University of Ferrara, Ferrara, Italy
| | - Silvia Pietrobon
- Department of Medical Sciences, School of Medicine, University of Ferrara, Ferrara, Italy
| | - Elisa Mazzoni
- Department of Medical Sciences, School of Medicine, University of Ferrara, Ferrara, Italy
| | - Giovanni Guerra
- Clinical Laboratory Analysis, University-Hospital of Ferrara, Ferrara, Italy
| | - Carlo Feo
- Department of Medical Sciences, School of Medicine, University of Ferrara, Ferrara, Italy
| | - Fernanda Martini
- Department of Medical Sciences, School of Medicine, University of Ferrara, Ferrara, Italy
| | - Mauro Tognon
- Department of Medical Sciences, School of Medicine, University of Ferrara, Ferrara, Italy
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11
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Choe MK, Kim HJ, Kim NH, Binas B, Kim HJ. Biphasic Production of Anti-ApoB100 Autoantibodies in Obese Humans and Mice. Pharmaceuticals (Basel) 2021; 14:330. [PMID: 33916621 DOI: 10.3390/ph14040330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 03/23/2021] [Accepted: 04/02/2021] [Indexed: 12/03/2022] Open
Abstract
Obesity is associated with autoimmunity, a phenomenon considered as harmful. Here we show that obese mice and humans produce IgG-type autoantibodies that specifically recognize apolipoprotein B-100 (ApoB100), its native epitope p210, and the synthetic p210 mimotope pB1. By contrast, antibodies against epitopes p45 and p240, which have been associated with atherosclerosis, were not detected in either the humans or mice. In a longitudinal analysis of high fat diet-fed mice, autoantibody production rose with increasing body weight, then decreased and plateaued at morbid obesity. Likewise, in a cross-sectional analysis of sera from 148 human volunteers spanning a wide BMI range and free of comorbidities, the immunoreactivity increased and then decreased with increasing BMI. Thus, the obesity-related ApoB100-specific natural autoantibodies characteristically showed the same epitope recognition, IgG-type, and biphasic serum levels in humans and mice. We previously reported that a pB1-based vaccine induces similar antibodies and can prevent obesity in mice. Therefore, our present results suggest that autoantibodies directed against native ApoB100 may mitigate obesity, and that the vaccination approach may be effective in humans.
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12
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Abstract
Vascular Endothelial Growth Factor (VEGF) promotes angiogenesis in tumours of various cancers. Monoclonal antibodies and nanobodies are one of the potent agents in the treatment of cancer. Due to their high costs, researchers are considering to design and produce peptides as a substitute approach in recent years. The aim of the current study was designing a mimotope against VEGF and evaluate its effects on cell proliferation and tube formation in the HUVEC cell line. For this, a peptide was designed against VEGF and chemically produced. The effects of synthetic peptide and nanobody on the inhibition of proliferation of HUVEC cells were examined using MTT and tube formation assays. The data indicate that the peptide was able to significantly inhibit both HUVEC cell proliferation and tube formation through inhibition of VEGF, highlighting the potential of peptides as a ‘novel’ class of candidate drugs to inhibit angiogenesis.
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Affiliation(s)
- Elmira Karami
- Venom and Biotherapeutics Molecules Laboratory, Biotechnology Department, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran.,Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Jean-Marc Sabatier
- Aix-Marseille Université, Institut de Neurophysiopathologie (INP) UMR 7051, 27 boulevard Jean Moulin, Faculté de Médecine, 13385 - Marseille Cédex 5, France
| | - Mahdi Behdani
- Venom and Biotherapeutics Molecules Laboratory, Biotechnology Department, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Shiva Irani
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Fatemeh Kazemi-Lomedasht
- Venom and Biotherapeutics Molecules Laboratory, Biotechnology Department, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
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13
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Mindur JE, Yadav SK, Ito N, Senoh M, Kato H, Dhib-Jalbut S, Ito K. Surface Layer Protein A Expressed in Clostridioides difficile DJNS06-36 Possesses an Encephalitogenic Mimotope of Myelin Basic Protein. Microorganisms 2020; 9:microorganisms9010034. [PMID: 33374217 PMCID: PMC7824458 DOI: 10.3390/microorganisms9010034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 12/14/2020] [Accepted: 12/21/2020] [Indexed: 12/29/2022] Open
Abstract
Multiple sclerosis (MS) is an inflammatory demyelinating disease of the central nervous system (CNS). Recent studies suggest that migration of Th1 and Th17 cells specific for enteric bacteria from the gut to the CNS may lead to the initiation and/or exacerbation of autoimmune diseases including MS. Human leukocyte antigen (HLA)-DR15 is an MHC class II (MHCII) haplotype highly associated with the development of MS that contains the two HLA-DRB* genes, DRB1*1501 (DR2b) and DRB5*0101 (DR2a). To identify enteric bacteria which harbor antigenic epitopes that activate myelin-specific T cells and drive CNS inflammation, we screened for enteric bacteria which express cross-reactive epitopes ('mimotopes') of an immunodominant myelin basic protein 89-98 (MBP89-98) epitope. Based on known MHCII HLA-DR2a amino acid binding motifs and cultivation with splenic T cells isolated from MBP-T cell receptor (TCR)/DR2a transgenic (Tg) mice, we discovered that a certain variant of surface layer protein A (SLPA), which is expressed by a subtype of Clostridioides difficile, contains an amino acid sequence that activates MBP89-98-reactive T cells. Furthermore, activation of MBP-specific T cells by SLPA upon active immunization induced experimental autoimmune encephalomyelitis (EAE) in MBP-TCR/DR2a Tg mice. This study suggests that a unique strain of C. difficile possesses an encephalitogenic mimotope of MBP that activates autoreactive, myelin-specific T cells.
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Affiliation(s)
- John E. Mindur
- Department of Neurology, Rutgers-Robert Wood Johnson Medical School, Piscataway, NJ 08854, USA; (J.E.M.); (S.K.Y.); (N.I.); (S.D.-J.)
- Center for Systems Biology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - Sudhir K. Yadav
- Department of Neurology, Rutgers-Robert Wood Johnson Medical School, Piscataway, NJ 08854, USA; (J.E.M.); (S.K.Y.); (N.I.); (S.D.-J.)
| | - Naoko Ito
- Department of Neurology, Rutgers-Robert Wood Johnson Medical School, Piscataway, NJ 08854, USA; (J.E.M.); (S.K.Y.); (N.I.); (S.D.-J.)
| | - Mitsutoshi Senoh
- Department of Bacteriology II, National Institute of Infectious Diseases, Tokyo 208-001, Japan; (M.S.); (H.K.)
| | - Haru Kato
- Department of Bacteriology II, National Institute of Infectious Diseases, Tokyo 208-001, Japan; (M.S.); (H.K.)
| | - Suhayl Dhib-Jalbut
- Department of Neurology, Rutgers-Robert Wood Johnson Medical School, Piscataway, NJ 08854, USA; (J.E.M.); (S.K.Y.); (N.I.); (S.D.-J.)
| | - Kouichi Ito
- Department of Neurology, Rutgers-Robert Wood Johnson Medical School, Piscataway, NJ 08854, USA; (J.E.M.); (S.K.Y.); (N.I.); (S.D.-J.)
- Correspondence: ; Tel.: +1-732-235-5482
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14
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Li Y, Hu Y, Tu Z, Ning Z, He Q, Fu J. Research on the Mechanism of Action of a Citrinin and Anti-Citrinin Antibody Based on Mimotope X27. Toxins (Basel) 2020; 12:toxins12100655. [PMID: 33066313 PMCID: PMC7602013 DOI: 10.3390/toxins12100655] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 10/06/2020] [Accepted: 10/08/2020] [Indexed: 12/11/2022] Open
Abstract
Immunoassays are developed based on antigen–antibody interactions. A mimotope is an effective recognition receptor used to study the mechanism of action of antigens and antibodies, and is used for improving the sensitivity of the antibody. In this study, we built a 3D structure of the citrinin (CIT) mimotope X27 and anti-CIT single-chain antibody fragment (ScFv) through a “homologous modeling” strategy. Then, CIT and X27 were respectively docked to anti-CIT ScFv by using the “molecular docking” program. Finally, T28, F29, N30, R31, and Y32 were confirmed as the key binding sites in X27. Furthermore, the result of the phage-ELISA showed that the mutational phage lost the binding activity to the anti-CIT ScFv when the five amino acids were mutated to “alanine”, thereby proving the correctness of the molecular docking model. Lastly, a site-directed saturation strategy was adopted for the sites (T28, F29, N30, R31, and Y32). Eighteen different amino acids were introduced to each site on average. The activities of all mutants were identified by indirect competitive ELISA. The sensitivities of mutants T28F, T28I, F29I, F29V, N30T, and N30V were 1.83-, 1.37-, 1.70-, 2.96-, 1.31-, and 2.01-fold higher than that of the wild-type, respectively. In conclusion, the binding model between the CIT and antibody was elaborated for the first time based on the mimotope method, thereby presenting another strategy for improving the sensitivity of citrinin detection in immunoassays.
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Affiliation(s)
- Yanping Li
- State Key Laboratory of Food Science and Technology, Jiangxi-OAI Joint Research Institute, Jiangxi Province Key Laboratory of Modern Analytical Sciences, Nanchang University, Nanchang 330047, China; (Y.L.); (Z.T.); (Q.H.)
| | - Yucheng Hu
- College of Food Science and Technology, Nanchang University, Nanchang 330047, China; (Y.H.); (Z.N.)
| | - Zhui Tu
- State Key Laboratory of Food Science and Technology, Jiangxi-OAI Joint Research Institute, Jiangxi Province Key Laboratory of Modern Analytical Sciences, Nanchang University, Nanchang 330047, China; (Y.L.); (Z.T.); (Q.H.)
| | - Zhenqiang Ning
- College of Food Science and Technology, Nanchang University, Nanchang 330047, China; (Y.H.); (Z.N.)
| | - Qinghua He
- State Key Laboratory of Food Science and Technology, Jiangxi-OAI Joint Research Institute, Jiangxi Province Key Laboratory of Modern Analytical Sciences, Nanchang University, Nanchang 330047, China; (Y.L.); (Z.T.); (Q.H.)
| | - Jinheng Fu
- State Key Laboratory of Food Science and Technology, Jiangxi-OAI Joint Research Institute, Jiangxi Province Key Laboratory of Modern Analytical Sciences, Nanchang University, Nanchang 330047, China; (Y.L.); (Z.T.); (Q.H.)
- Correspondence:
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15
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Abstract
While studying the human public IgM igome as represented by a library of 224,087 linear mimotopes, three exact matches to peptides in the proteins of SARS-CoV-2 were found: two in the open reading frame 1ab and one in the spike protein. Joining the efforts to fast track SARS-CoV-2 vaccine development, here we describe briefly these potential epitopes in comparison to mimotopes representing peptides of SARS-CoV, HCoV 229E and OC43.
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Affiliation(s)
- Velizar Shivarov
- Laboratory of Clinical Immunology and Department of Clinical Hematology, Sofiamed University Hospital, Sofia, Bulgaria
- Faculty of Biology, Sofia University, Sofia, Bulgaria
| | - Peter K. Petrov
- Department of Analysis, Geometry and Topology, Institute of Mathematics and Informatics, Bulgarian Academy of Sciences (BAS), Sofia, Bulgaria
| | - Anastas D. Pashov
- Department of Immunology, Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences (BAS), Sofia, Bulgaria
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16
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He B, Dzisoo AM, Derda R, Huang J. Development and Application of Computational Methods in Phage Display Technology. Curr Med Chem 2020; 26:7672-7693. [PMID: 29956612 DOI: 10.2174/0929867325666180629123117] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 02/08/2018] [Accepted: 03/20/2018] [Indexed: 12/12/2022]
Abstract
BACKGROUND Phage display is a powerful and versatile technology for the identification of peptide ligands binding to multiple targets, which has been successfully employed in various fields, such as diagnostics and therapeutics, drug-delivery and material science. The integration of next generation sequencing technology with phage display makes this methodology more productive. With the widespread use of this technique and the fast accumulation of phage display data, databases for these data and computational methods have become an indispensable part in this community. This review aims to summarize and discuss recent progress in the development and application of computational methods in the field of phage display. METHODS We undertook a comprehensive search of bioinformatics resources and computational methods for phage display data via Google Scholar and PubMed. The methods and tools were further divided into different categories according to their uses. RESULTS We described seven special or relevant databases for phage display data, which provided an evidence-based source for phage display researchers to clean their biopanning results. These databases can identify and report possible target-unrelated peptides (TUPs), thereby excluding false-positive data from peptides obtained from phage display screening experiments. More than 20 computational methods for analyzing biopanning data were also reviewed. These methods were classified into computational methods for reporting TUPs, for predicting epitopes and for analyzing next generation phage display data. CONCLUSION The current bioinformatics archives, methods and tools reviewed here have benefitted the biopanning community. To develop better or new computational tools, some promising directions are also discussed.
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Affiliation(s)
- Bifang He
- Center for Informational Biology, University of Electronic Science and Technology of China, Chengdu 611731, China.,School of Medicine, Guizhou University, Guiyang 550025, China
| | - Anthony Mackitz Dzisoo
- Center for Informational Biology, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Ratmir Derda
- Department of Chemistry, University of Alberta, Edmonton T6G 2G2, Alberta, Canada
| | - Jian Huang
- Center for Informational Biology, University of Electronic Science and Technology of China, Chengdu 611731, China
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17
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Guevarra LA, Boado KJO, Ceñidoza FBB, Imbao MRLM, Sia MJG, Dalmacio LMM. A synthetic peptide analog of in silico-predicted immunogenic epitope unique to dengue virus serotype 2 NS1 antigen specifically binds immunoglobulin G antibodies raised in rabbits. Microbiol Immunol 2020; 64:153-161. [PMID: 31710119 DOI: 10.1111/1348-0421.12757] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 11/01/2019] [Accepted: 11/06/2019] [Indexed: 12/20/2022]
Abstract
Development of a serotyping-capable dengue detection test is hampered by the absence of an identified unique marker that can detect specific dengue virus (DENV) serotype. In the current commercially available antibody-capture diagnostic methods, immobilized nonstructural 1 (NS1) antigen indiscriminately binds and detects immunoglobulin M or immunoglobulin G against any serotype, thus limiting its capability to distinguish existing serotypes of dengue. Identification of dengue serotype is important because certain serotypes are associated with severe forms of dengue as well as dengue hemorrhagic fever. In this study, we aimed to identify an immunogenic epitope unique to DENV2 NS1 antigen and determine the binding specificity of its synthetic peptide mimotope to antibodies raised in animal models. Selection of a putative B-cell epitope from the reported DENV2 NS1 antigen was done using Kolaskar and Tongaonkar Antigenicity prediction, Emini surface accessibility prediction, and Parker hydrophilicity prediction available at the immune epitope database and analysis resource. Uniqueness of the B-cell epitope to DENV2 was analyzed by BLASTp. Immunogenicity of the synthetic peptide analog of the predicted immunogenic epitope was tested in rabbits. The binding specificity of the antibodies raised in animals and the synthetic peptide mimotope was tested by indirect ELISA. A synthetic peptide analog comprising the unique epitope of DENV2 located at the 170th-183rd position of DENV2 NS1 was found to be immunogenic in animal models. The antipeptide antibody produced in rabbits showed specific binding to the synthetic peptide mimotope of the predicted unique DENV2 NS1 immunogenic epitope.
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Affiliation(s)
- Leonardo A Guevarra
- Department of Biochemistry, Faculty of Pharmacy, University of Santo Tomas, España Blvd, Sampaloc, Manila, Philippines.,Department of Biochemistry and Molecular Biology, College of Medicine, University of the Philippines Manila, 1/F Salcedo Hall Pedro Gil St., Ermita, Manila, Philippines.,Research Center for Natural and Applied Sciences, University of Santo Tomas, España Blvd, Sampaloc, Manila, Philippines
| | - Kathleen Joyce O Boado
- Department of Biochemistry, Faculty of Pharmacy, University of Santo Tomas, España Blvd, Sampaloc, Manila, Philippines
| | - Fidel Bryan B Ceñidoza
- Department of Biochemistry, Faculty of Pharmacy, University of Santo Tomas, España Blvd, Sampaloc, Manila, Philippines
| | - Ma Rio Lauren M Imbao
- Department of Biochemistry, Faculty of Pharmacy, University of Santo Tomas, España Blvd, Sampaloc, Manila, Philippines
| | - Michelle Joy G Sia
- Department of Biochemistry, Faculty of Pharmacy, University of Santo Tomas, España Blvd, Sampaloc, Manila, Philippines
| | - Leslie Michelle M Dalmacio
- Department of Biochemistry and Molecular Biology, College of Medicine, University of the Philippines Manila, 1/F Salcedo Hall Pedro Gil St., Ermita, Manila, Philippines
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18
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Abstract
The inflammasome is responsible for maturation of interleukin-1β (IL-1β) and interleukin-18 (IL-18) contributing to the inflammatory process in atherosclerosis. It is shown here that an electronegative low-density lipoprotein [LDL (-)] apoB-100 mimetic peptide can activate the transcriptional and posttranslational signs needed for complete inflammasome activation. This peptide, named p2C7, can activate the Toll-like receptor 4 (TLR4) that induces NF-κB activation and the transcription of inflammasome components. After blocking TLR4 with a neutralizing antibody, inflammasome component (NLRP3, CASP1, and ASC) and IL1b and IL18 gene downregulation occurred in human-derived macrophages stimulated with p2C7 or LDL (-). Moreover, the posttranslational signal was activated by the interaction between p2C7 and the lectin-type oxidized LDL receptor 1 (LOX-1), as demonstrated by the induction of caspase-1 cleavage in macrophages. The blockage of either TLR4 or LOX-1 decreased IL-1β and IL-18 secretion by human-derived macrophages as both pathways are necessary for complete inflammasome activation. These findings suggest a mechanism by which macrophages transduce the pro-inflammatory signal provided by LDL (-) ApoB-100 and its mimetic peptides to activate the inflammasome protein complex what may be relevant for the inflammatory process in atherosclerosis.
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Affiliation(s)
- Gustavo Luis Tripodi
- Department of Clinical and Toxicological Analyses, Faculty of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo, 05508-000, Brazil
| | - Marcela Bach Prieto
- Department of Clinical and Toxicological Analyses, Faculty of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo, 05508-000, Brazil
| | - Dulcineia Saes Parra Abdalla
- Department of Clinical and Toxicological Analyses, Faculty of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo, 05508-000, Brazil.
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19
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Pashov A, Shivarov V, Hadzhieva M, Kostov V, Ferdinandov D, Heintz KM, Pashova S, Todorova M, Vassilev T, Kieber-Emmons T, Meza-Zepeda LA, Hovig E. Diagnostic Profiling of the Human Public IgM Repertoire With Scalable Mimotope Libraries. Front Immunol 2019; 10:2796. [PMID: 31849974 PMCID: PMC6901697 DOI: 10.3389/fimmu.2019.02796] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 11/14/2019] [Indexed: 12/12/2022] Open
Abstract
Specific antibody reactivities are routinely used as biomarkers, but the antibody repertoire reactivity (igome) profiles are still neglected. Here, we propose rationally designed peptide arrays as efficient probes for these system level biomarkers. Most IgM antibodies are characterized by few somatic mutations, polyspecificity, and physiological autoreactivity with housekeeping function. Previously, probing this repertoire with a set of immunodominant self-proteins provided a coarse analysis of the respective repertoire profiles. In contrast, here, we describe the generation of a peptide mimotope library that reflects the common IgM repertoire of 10,000 healthy donors. In addition, an appropriately sized subset of this quasi-complete mimotope library was further designed as a potential diagnostic tool. A 7-mer random peptide phage display library was panned on pooled human IgM. Next-generation sequencing of the selected phage yielded 224,087 sequences, which clustered in 790 sequence clusters. A set of 594 mimotopes, representative of the most significant sequence clusters, was shown to probe symmetrically the space of IgM reactivities in patients' sera. This set of mimotopes can be easily scaled including a greater proportion of the mimotope library. The trade-off between the array size and the resolution can be explored while preserving the symmetric sampling of the mimotope sequence and reactivity spaces. BLAST search of the non-redundant protein database with the mimotopes sequences yielded significantly more immunoglobulin J region hits than random peptides, indicating a considerable idiotypic connectivity of the targeted igome. The proof of principle predictors for random diagnoses was represented by profiles of mimotopes. The number of potential reactivity profiles that can be extracted from this library is estimated at more than 1070. Thus, a quasi-complete IgM mimotope library and a scalable representative subset thereof are found to address very efficiently the dynamic diversity of the human public IgM repertoire, providing informationally dense and structurally interpretable IgM reactivity profiles.
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Affiliation(s)
- Anastas Pashov
- Laboratory of Experimental Immunotherapy, Department of Immunology, Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Velizar Shivarov
- Laboratory of Clinical Immunology, Department of Clinical Hematology, Sofiamed University Hospital, Sofia, Bulgaria.,Faculty of Biology, Sofia University "St. Kliment Ohridski," Sofia, Bulgaria
| | - Maya Hadzhieva
- Laboratory of Experimental Immunotherapy, Department of Immunology, Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Victor Kostov
- Laboratory of Experimental Immunotherapy, Department of Immunology, Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria.,Neurosurgery Clinic, St. Ivan Rilsky Hospital, Sofia MU, Sofia, Bulgaria
| | - Dilyan Ferdinandov
- Neurosurgery Clinic, St. Ivan Rilsky Hospital, Sofia MU, Sofia, Bulgaria
| | - Karen-Marie Heintz
- Department of Tumor Biology, Institute for Cancer Research, Oslo University Hospital, Oslo, Norway
| | - Shina Pashova
- Laboratory of Experimental Immunotherapy, Department of Immunology, Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria.,Department of Molecular Immunology, Institute of Biology and Immunology of Reproduction, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Milena Todorova
- Laboratory of Experimental Immunotherapy, Department of Immunology, Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Tchavdar Vassilev
- Institute of Biology and Biomedicine, N.I. Lobachevsky University, Nizhny Novgorod, Russia
| | - Thomas Kieber-Emmons
- Winthrop P. Rockefeller Cancer Research Center, UAMS, Little Rock, AR, United States
| | - Leonardo A Meza-Zepeda
- Department of Tumor Biology, Institute for Cancer Research, Oslo University Hospital, Oslo, Norway
| | - Eivind Hovig
- Department of Tumor Biology, Institute for Cancer Research, Oslo University Hospital, Oslo, Norway.,Centre for Bioinformatics, Department of Informatics, University of Oslo, Oslo, Norway
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20
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Huang W, Tu Z, Ning Z, He Q, Li Y. Development of Real-Time Immuno-PCR Based on Phage Displayed an Anti-Idiotypic Nanobody for Quantitative Determination of Citrinin in Monascus. Toxins (Basel) 2019; 11:toxins11100572. [PMID: 31575068 PMCID: PMC6832940 DOI: 10.3390/toxins11100572] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 09/18/2019] [Accepted: 09/26/2019] [Indexed: 01/01/2023] Open
Abstract
Citrinin (CIT) is a mycotoxin that has been detected in agricultural products, feedstuff, and Monascus products. At present, research has been performed to develop methods for CIT detection, mainly through TLC, HPLC, biosensor, and immunoassay. The immunoassay method is popular with researchers because of its speed, economy, simplicity, and ease of control. However, mycotoxins are inevitably introduced during the determination. Immunoassays require the use of toxins coupled to carrier proteins or enzymes to make competitive antigens. In this study, anti-idiotypic nanobody X27 as CIT mimetic antigen was used as non-toxic surrogate reagents in immunoassay. Therefore, the X27-based real-time immuno-PCR (rtIPCR) method had been established after optimal experiments of annealing temperature and amplification efficiency of real-time PCR, concentration of coating antibody, phage X27, and methyl alcohol. The IC50 value of the established method in the present study is 9.86 ± 2.52 ng/mL, which is nearly equivalent to the traditional phage ELISA method. However, the linear range is of 0.1-1000 ng/mL, which has been broadened 10-fold compared to the phage ELISA method. Besides, the X27-based rtIPCR method has no cross-reactivity to the common mycotoxins, like aflatoxin B1 (AFB1), deoxynivalenol (DON), ochratoxin A (OTA), and zearalenone (ZEN). The method has also been applied to the determination of CIT in rice flour and flour samples, and the recovery was found to be in the range of 90.0-104.6% and 75.8-110.0% respectively. There was no significant difference in the results between the rtIPCR and UPLC-MS. The anti-idiotypic nanobody as a non-toxic surrogate of CIT makes rtIPCR a promising method for actual CIT analysis in Monascus products.
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Affiliation(s)
- Wenping Huang
- State Key Laboratory of Food Science and Technology, Jiangxi-OAI Joint Research Institute, Jiangxi Province Key Laboratory of Modern Analytical Sciences, Nanchang University, Nanchang 330047, China.
| | - Zhui Tu
- State Key Laboratory of Food Science and Technology, Jiangxi-OAI Joint Research Institute, Jiangxi Province Key Laboratory of Modern Analytical Sciences, Nanchang University, Nanchang 330047, China.
| | - Zhenqiang Ning
- State Key Laboratory of Food Science and Technology, Jiangxi-OAI Joint Research Institute, Jiangxi Province Key Laboratory of Modern Analytical Sciences, Nanchang University, Nanchang 330047, China.
| | - Qinghua He
- State Key Laboratory of Food Science and Technology, Jiangxi-OAI Joint Research Institute, Jiangxi Province Key Laboratory of Modern Analytical Sciences, Nanchang University, Nanchang 330047, China.
| | - Yanping Li
- State Key Laboratory of Food Science and Technology, Jiangxi-OAI Joint Research Institute, Jiangxi Province Key Laboratory of Modern Analytical Sciences, Nanchang University, Nanchang 330047, China.
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21
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Li J, Wang H, Han Y, Zhao Y, Zhou H, Xu J, Li L. Novel peptides screened by phage display peptide library can mimic epitopes of the FnBPA-A protein and induce protective immunity against Staphylococcus aureus in mice. Microbiologyopen 2019; 8:e910. [PMID: 31452334 PMCID: PMC6813446 DOI: 10.1002/mbo3.910] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 06/20/2019] [Accepted: 06/30/2019] [Indexed: 12/15/2022] Open
Abstract
Fibronectin‐binding protein A (FnBPA) is a key adhesin of Staphylococcus aureus, and the protein binding to fibrinogen and elastin is mediated by its N‐terminal A domain. Thus, FnBPA‐A has been considered a potential vaccine candidate, but the relevant epitopes are not fully understood. Here, purified rabbit anti‐FnBPA‐A antibodies were produced and used to screen for peptides corresponding to or mimicking the epitope of native FnBPA‐A protein by using a phage random 12‐mer peptide library. After four rounds of panning, 25 randomly selected phage clones were detected by phage‐ELISA and competition‐inhibition ELISA. Then, eight anti‐rFnBPA‐A antibody‐binding phage clones were selected for sequencing, and six different 12‐mer peptides were displayed by these phages. Although these displayed peptides shared no more than three consecutive amino acid residues identical to the sequence of FnBPA‐A, they could be recognized by the FnBPA‐A‐specific antibodies in vitro and could induce specific antibodies against FnBPA‐A in vivo, suggesting that these displayed peptides were mimotopes of FnBPA‐A. Finally, the protective efficiencies of these mimotopes were investigated by mouse vaccination and challenge experiments. Compared with that of control group mice, the relative percent survival of mice immunized with phage clones displaying a mimotope was 13.33% (C2 or C15), 0% (C8), 6.67% (C10), 26.67% (C19 or 1:2 mixture of C23 and C19), 53.33% (C23), 33.33% (1:1 mixture of C23 and C19), and 66.67% (2:1 mixture of C23 and C19). Overall, five peptides mimicking FnBPA‐A protein epitopes were obtained, and a partially protective immunity against S. aureus infection could be stimulated by these mimotope peptides in mice.
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Affiliation(s)
- Jin‐Nian Li
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, College of Animal Science and TechnologyAnhui Agricultural UniversityHefeiChina
| | - Hong Wang
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, College of Animal Science and TechnologyAnhui Agricultural UniversityHefeiChina
| | - Yu‐Xi Han
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, College of Animal Science and TechnologyAnhui Agricultural UniversityHefeiChina
| | - Yu‐Ting Zhao
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, College of Animal Science and TechnologyAnhui Agricultural UniversityHefeiChina
| | - Huan‐Huan Zhou
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, College of Animal Science and TechnologyAnhui Agricultural UniversityHefeiChina
| | - Jun Xu
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, College of Animal Science and TechnologyAnhui Agricultural UniversityHefeiChina
| | - Lin Li
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, College of Animal Science and TechnologyAnhui Agricultural UniversityHefeiChina
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22
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Favoino E, Prete M, Catacchio G, Conteduca G, Perosa F. CD20- Mimotope Peptides: A Model to Define the Molecular Basis of Epitope Spreading. Int J Mol Sci 2019; 20:ijms20081920. [PMID: 31003532 PMCID: PMC6515264 DOI: 10.3390/ijms20081920] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 04/12/2019] [Accepted: 04/15/2019] [Indexed: 12/28/2022] Open
Abstract
Antigen-mimicking peptide (mimotope)-based vaccines are one of the most promising forms of active-immunotherapy. The main drawback of this approach is that it induces antibodies that react poorly with the nominal antigen. The aim of this study was to investigate the molecular basis underlying the weak antibody response induced against the naïve protein after peptide vaccination. For this purpose, we analyzed the fine specificity of monoclonal antibodies (mAb) elicited with a 13-mer linear peptide, complementary to theantigen-combining site of the anti-CD20 mAb, Rituximab, in BALB/c mice. Anti-peptide mAb competed with Rituximab for peptide binding. Even so, they recognized a different antigenic motif from the one recognized by Rituximab. This explains their lack of reactivity with membrane (naïve) CD20. These data indicate that even on a short peptide the immunogenic and antigenic motifs may be different. These findings highlight an additional mechanism for epitope spreading and should be taken into account when designing peptides for vaccine purposes.
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MESH Headings
- Animals
- Antibodies, Monoclonal/genetics
- Antibodies, Monoclonal/immunology
- Antibodies, Monoclonal, Murine-Derived/genetics
- Antibodies, Monoclonal, Murine-Derived/immunology
- Antigens, CD20/genetics
- Antigens, CD20/immunology
- Binding Sites, Antibody/genetics
- Epitopes/genetics
- Epitopes/immunology
- Humans
- Mice
- Peptide Library
- Peptides/genetics
- Peptides/immunology
- Rituximab/genetics
- Rituximab/immunology
- Vaccination/methods
- Vaccines, Subunit/genetics
- Vaccines, Subunit/immunology
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Affiliation(s)
- Elvira Favoino
- Department of Biomedical Sciences and Human Oncology (DIMO), Rheumatologic and Systemic Autoimmune Diseases Unit, University of Bari Medical School, I-70124 Bari, Italy.
| | - Marcella Prete
- Department of Biomedical Sciences and Human Oncology (DIMO), Rheumatologic and Systemic Autoimmune Diseases Unit, University of Bari Medical School, I-70124 Bari, Italy.
| | - Giacomo Catacchio
- Department of Biomedical Sciences and Human Oncology (DIMO), Rheumatologic and Systemic Autoimmune Diseases Unit, University of Bari Medical School, I-70124 Bari, Italy.
| | - Giuseppina Conteduca
- Department of Biomedical Sciences and Human Oncology (DIMO), Rheumatologic and Systemic Autoimmune Diseases Unit, University of Bari Medical School, I-70124 Bari, Italy.
| | - Federico Perosa
- Department of Biomedical Sciences and Human Oncology (DIMO), Rheumatologic and Systemic Autoimmune Diseases Unit, University of Bari Medical School, I-70124 Bari, Italy.
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23
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Peltomaa R, Amaro-Torres F, Carrasco S, Orellana G, Benito-Peña E, Moreno-Bondi MC. Homogeneous Quenching Immunoassay for Fumonisin B 1 Based on Gold Nanoparticles and an Epitope-Mimicking Yellow Fluorescent Protein. ACS Nano 2018; 12:11333-11342. [PMID: 30481972 DOI: 10.1021/acsnano.8b06094] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Homogeneous immunoassays represent an attractive alternative to traditional heterogeneous assays due to their simplicity, sensitivity, and speed. On the basis of a previously identified epitope-mimicking peptide, or mimotope, we developed a homogeneous fluorescence quenching immunoassay based on gold nanoparticles (AuNPs) and a recombinant epitope-mimicking fusion protein for the detection of mycotoxin fumonisin B1 (FB1). The fumonisin mimotope was cloned as a fusion protein with a yellow fluorescent protein that could be used directly as the tracer for FB1 detection without the need of labeling or a secondary antibody. Furthermore, owing to the fluorescence quenching ability of AuNPs, a homogeneous immunoassay could be performed in a single step without washing steps to separate the unbound tracer. The homogeneous quenching assay showed negligible matrix effects in 5% wheat extract and high sensitivity for FB1 detection, with a dynamic range from 7.3 to 22.6 ng mL-1, a detection limit of 1.1 ng mL-1, and IC50 value of 12.9 ng mL-1, which was significantly lower than the IC50 value of the previously reported assay using the synthetic counterpart of the same mimotope in a microarray format. The homogeneous assay was demonstrated to be specific for fumonisins B1 and B2, as no significant cross-reactivity with other mycotoxins was observed, and acceptable recoveries (86% for FB1 2000 μg kg-1 and 103% for FB1 4000 μg kg-1), with relative standard deviation less than 6.5%, were reported from spiked wheat samples, proving that the method could provide a valuable tool for simple analysis of mycotoxin-contaminated food samples.
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24
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Li D, Zhang T, Yang X, Geng J, Li S, Ding H, Li H, Huang A, Wang C, Sun L, Bai C, Zhang H, Li J, Dong J, Shao N. Identification of Functional mimotopes of human Vasorin Ectodomain by Biopanning. Int J Biol Sci 2018; 14:461-470. [PMID: 29725267 PMCID: PMC5930478 DOI: 10.7150/ijbs.22692] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 02/25/2018] [Indexed: 01/11/2023] Open
Abstract
Human vasorin (VASN) as a type I transmembrane protein, is a potential biomarker of hepatocellular carcinoma, which could expedite HepG2 cell proliferation and migration significantly in vitro. The ectodomain of VASN was proteolytically released to generate soluble VASN (sVASN), which was validated to be the active form. Among several monoclonal antibodies produced against sVASN, the clone V21 was found to bind with the recombinant human sVASN (rhsVASN) with the highest affinity and specificity, and also have inhibitory effects on proliferation and migration of HepG2 cells. Hence the phage-displayed peptide library was screened against the antibody V21. The positive phage clones were isolated and sequenced, and one unique consensus motifs was obtained. The result of sequence alignment showed that the conserved motif had similarity to VASN(Cys432-Cys441), embedded in the epidermal growth factor (EGF)-like domain. The synthetic mimotope peptide V21P1 and V21P2 were confirmed to bind with V21 and could compete with rhsVASN in ELISA assay. And they could also almost completely reverse the inhibitory effect of V21 on HepG2 migration and proliferation. Furthermore, the antibodies produced against V21P1 were able to bind not only with the peptide V21P1, but also with rhsVASN and the natural VASN from HepG2 cell. Our results showed that V21 seemed to be a functional antibody. The mimotopes toward V21 might mimic the functional domain of VASN, which would be helpful to exploit VASN functions and act as a candidate target for developing therapeutic antibodies against VASN.
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Affiliation(s)
- Da Li
- Institute of Military Cognitive and Brain Sciences, Academy of Military Medical Sciences, Beijing 100850, China
| | - Tan Zhang
- Institute of Military Cognitive and Brain Sciences, Academy of Military Medical Sciences, Beijing 100850, China
| | - Xiqin Yang
- Institute of Military Cognitive and Brain Sciences, Academy of Military Medical Sciences, Beijing 100850, China
| | - Jie Geng
- Institute of Military Cognitive and Brain Sciences, Academy of Military Medical Sciences, Beijing 100850, China
| | - Shaohua Li
- Institute of Military Cognitive and Brain Sciences, Academy of Military Medical Sciences, Beijing 100850, China
| | - Hongmei Ding
- Institute of Military Cognitive and Brain Sciences, Academy of Military Medical Sciences, Beijing 100850, China
| | - Hui Li
- Institute of Military Cognitive and Brain Sciences, Academy of Military Medical Sciences, Beijing 100850, China
| | - Aixue Huang
- Institute of Military Cognitive and Brain Sciences, Academy of Military Medical Sciences, Beijing 100850, China
| | - Chaonan Wang
- Institute of Military Cognitive and Brain Sciences, Academy of Military Medical Sciences, Beijing 100850, China
| | - Leqiao Sun
- Institute of Military Cognitive and Brain Sciences, Academy of Military Medical Sciences, Beijing 100850, China
| | - Chenjun Bai
- Institute of Military Cognitive and Brain Sciences, Academy of Military Medical Sciences, Beijing 100850, China
| | - Heqiu Zhang
- Institute of Military Cognitive and Brain Sciences, Academy of Military Medical Sciences, Beijing 100850, China
| | - Jie Li
- Institute of Military Cognitive and Brain Sciences, Academy of Military Medical Sciences, Beijing 100850, China
| | - Jie Dong
- Institute of Military Cognitive and Brain Sciences, Academy of Military Medical Sciences, Beijing 100850, China
| | - Ningsheng Shao
- Institute of Military Cognitive and Brain Sciences, Academy of Military Medical Sciences, Beijing 100850, China
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25
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Wang A, Cui M, Qu H, Di J, Wang Z, Xing J, Wu F, Wu W, Wang X, Shen L, Jiang B, Su X. Induction of anti-EGFR immune response with mimotopes identified from a phage display peptide library by panitumumab. Oncotarget 2018; 7:75293-75306. [PMID: 27659529 PMCID: PMC5342741 DOI: 10.18632/oncotarget.12167] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2016] [Accepted: 09/12/2016] [Indexed: 12/22/2022] Open
Abstract
The epidermal growth factor receptor (EGFR) is overexpressed in several epithelial tumors. Anti-EGFR humanized monoclonal antibodies, cetuximab and panitumumab, in combination with chemotherapy have improved the prognosis for patients with wild-type RAS tumors. To identify mimotopes of EGFR and develop mimotope-based EGFR vaccines, we screened a phage display peptide library with panitumumab. Two EGFR mimotopes P19 and P26, which could be recognized by panitumumab specifically, were isolated. To enhance the immune responses, we generated recombinant proteins of P19 or P26 fused to a heat-shock cognate protein 70 (Hsc70), and evaluated the efficacy of Hsc70-P19 and Hsc70-P26 as vaccines in vivo. Immunization with Hsc70-P19 or Hsc70-P26 fusion protein stimulated the immune system to produce specific antibodies against peptides as well as EGFR. Moreover, antibodies elicited against mimotopes could induce antibody-dependent cellular cytotoxicity (ADCC), complement-dependent cytotoxicity (CDC), and inhibit the proliferation of EGFR-overexpressing A431 cells. Treatment with Hsc70-P19 and Hsc70-P26 significantly reduced tumor growth in BALB/c transplantable lung cancer models. Although there was no sequence homology between the phage-derived peptides and EGFR by alignments, both peptides mimic the conformational structure of EGFR binding to panitumumab. In conclusion, the mimotopes we identified from phage display peptide library could be promising candidate vaccines for active anti-EGFR immunotherapy against cancers.
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Affiliation(s)
- Aidong Wang
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Gastrointestinal Surgery IV, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - Ming Cui
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Gastrointestinal Surgery IV, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - Hong Qu
- Center for Bioinformatics, State Key Laboratory of Protein and Plant Gene Research, College of Life Sciences, Peking University, Beijing, 100871, China
| | - Jiabo Di
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Gastrointestinal Surgery IV, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - Zaozao Wang
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Gastrointestinal Surgery IV, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - Jiadi Xing
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Gastrointestinal Surgery IV, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - Fan Wu
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Gastrointestinal Surgery IV, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - Wei Wu
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Gastrointestinal Surgery IV, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - Xicheng Wang
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Gastrointestinal Oncology, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - Lin Shen
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Gastrointestinal Oncology, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - Beihai Jiang
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Gastrointestinal Surgery IV, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - Xiangqian Su
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Gastrointestinal Surgery IV, Peking University Cancer Hospital & Institute, Beijing 100142, China
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26
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Pietrobon S, Bononi I, Mazzoni E, Lotito F, Manfrini M, Puozzo A, Destro F, Guerra G, Nocini PF, Martini F, Tognon MG. Specific IgG Antibodies React to Mimotopes of BK Polyomavirus, a Small DNA Tumor Virus, in Healthy Adult Sera. Front Immunol 2017; 8:236. [PMID: 28321224 PMCID: PMC5338004 DOI: 10.3389/fimmu.2017.00236] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 02/17/2017] [Indexed: 12/21/2022] Open
Abstract
BK polyomavirus (BKPyV) was isolated in 1971 from the urine of a kidney transplant patient. Soon after its identification, BKPyV was characterized as a kidney-tropic virus, which is responsible of a significant fraction of the rejection of transplant kidney in the host. Moreover, in experimental conditions, BKPyV is able to transform different types of animal and human cells and to induce tumors of different histotypes in experimental animals. BKPyV DNA sequences have been detected in healthy individuals and cancer patients using polymerase chain reaction/Shouthern blot hybridization methods. Serum antibodies against this polyomavirus were revealed using immunological techniques, which, however, cross-react with other polyomaviruses such as JC (JCPyV) and Simian Virus 40. These non-specific data indicate the need of novel immunological methods and new investigations to check in a specific manner, BKPyV spread in humans. To this aim, mimotopes from BKPyV structural capsid protein 1 (VP1) were employed for specific immunological reactions to IgG antibodies of human serum samples. An indirect enzyme-linked immunosorbent assay with synthetic peptides mimicking immunogenic epitopes of BKPyV VP1 was set up and employed to test sera of healthy adult subjects. Data from this innovative immunological assay indicate that serum antibodies against BKPyV VP1 mimotopes are detectable in healthy subjects ranging from 18 to 90 years old. The overall prevalence of serum samples that reacted to BKPyV VP1 mimotopes was 72%. The strong points from this investigation are the novelty of the immunological method, its simplicity of the approach, and the specificity of BKPyV antibody reaction to VP1 mimotopes.
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Affiliation(s)
- Silvia Pietrobon
- Laboratories of Cell Biology and Molecular Genetics, Department of Morphology, Surgery and Experimental Medicine, Section of Pathology, Oncology and Experimental Biology, School of Medicine, University of Ferrara , Ferrara , Italy
| | - Ilaria Bononi
- Laboratories of Cell Biology and Molecular Genetics, Department of Morphology, Surgery and Experimental Medicine, Section of Pathology, Oncology and Experimental Biology, School of Medicine, University of Ferrara , Ferrara , Italy
| | - Elisa Mazzoni
- Laboratories of Cell Biology and Molecular Genetics, Department of Morphology, Surgery and Experimental Medicine, Section of Pathology, Oncology and Experimental Biology, School of Medicine, University of Ferrara , Ferrara , Italy
| | - Francesca Lotito
- Laboratories of Cell Biology and Molecular Genetics, Department of Morphology, Surgery and Experimental Medicine, Section of Pathology, Oncology and Experimental Biology, School of Medicine, University of Ferrara , Ferrara , Italy
| | - Marco Manfrini
- Laboratories of Cell Biology and Molecular Genetics, Department of Morphology, Surgery and Experimental Medicine, Section of Pathology, Oncology and Experimental Biology, School of Medicine, University of Ferrara , Ferrara , Italy
| | - Andrea Puozzo
- Laboratories of Cell Biology and Molecular Genetics, Department of Morphology, Surgery and Experimental Medicine, Section of Pathology, Oncology and Experimental Biology, School of Medicine, University of Ferrara , Ferrara , Italy
| | - Federica Destro
- Laboratories of Cell Biology and Molecular Genetics, Department of Morphology, Surgery and Experimental Medicine, Section of Pathology, Oncology and Experimental Biology, School of Medicine, University of Ferrara , Ferrara , Italy
| | - Giovanni Guerra
- Clinical Laboratory Analysis, University Hospital of Ferrara , Ferrara , Italy
| | - Pier Francesco Nocini
- Department of Surgery, Section of Oral and Maxillofacial Surgery, School of Medicine, University of Verona , Verona , Italy
| | - Fernanda Martini
- Laboratories of Cell Biology and Molecular Genetics, Department of Morphology, Surgery and Experimental Medicine, Section of Pathology, Oncology and Experimental Biology, School of Medicine, University of Ferrara , Ferrara , Italy
| | - Mauro G Tognon
- Laboratories of Cell Biology and Molecular Genetics, Department of Morphology, Surgery and Experimental Medicine, Section of Pathology, Oncology and Experimental Biology, School of Medicine, University of Ferrara , Ferrara , Italy
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27
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Hu YF, Zhao D, Yu XL, Hu YL, Li RC, Ge M, Xu TQ, Liu XB, Liao HY. Identification of Bacterial Surface Antigens by Screening Peptide Phage Libraries Using Whole Bacteria Cell-Purified Antisera. Front Microbiol 2017; 8:82. [PMID: 28184219 PMCID: PMC5266700 DOI: 10.3389/fmicb.2017.00082] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 01/11/2017] [Indexed: 01/10/2023] Open
Abstract
Bacterial surface proteins can be good vaccine candidates. In the present study, we used polyclonal antibodies purified with intact Erysipelothrix rhusiopthiae to screen phage-displayed random dodecapeptide and loop-constrained heptapeptide libraries, which led to the identification of mimotopes. Homology search of the mimotope sequences against E. rhusiopthiae-encoded ORF sequences revealed 14 new antigens that may localize on the surface of E. rhusiopthiae. When these putative surface proteins were used to immunize mice, 9/11 antigens induced protective immunity. Thus, we have demonstrated that a combination of using the whole bacterial cells to purify antibodies and using the phage-displayed peptide libraries to determine the antigen specificities of the antibodies can lead to the discovery of novel bacterial surface antigens. This can be a general approach for identifying surface antigens for other bacterial species.
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Affiliation(s)
- Yun-Fei Hu
- College of Veterinary Medicine, Preventive Veterinary Medicine, Hunan Agricultural University Changsha, China
| | - Dun Zhao
- College of Veterinary Medicine, Preventive Veterinary Medicine, Hunan Agricultural University Changsha, China
| | - Xing-Long Yu
- College of Veterinary Medicine, Preventive Veterinary Medicine, Hunan Agricultural University Changsha, China
| | - Yu-Li Hu
- College of Veterinary Medicine, Preventive Veterinary Medicine, Hunan Agricultural University Changsha, China
| | - Run-Cheng Li
- College of Veterinary Medicine, Preventive Veterinary Medicine, Hunan Agricultural University Changsha, China
| | - Meng Ge
- College of Veterinary Medicine, Preventive Veterinary Medicine, Hunan Agricultural University Changsha, China
| | - Tian-Qi Xu
- College of Veterinary Medicine, Preventive Veterinary Medicine, Hunan Agricultural University Changsha, China
| | - Xiao-Bo Liu
- College of Veterinary Medicine, Preventive Veterinary Medicine, Hunan Agricultural University Changsha, China
| | - Hua-Yuan Liao
- College of Veterinary Medicine, Preventive Veterinary Medicine, Hunan Agricultural University Changsha, China
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28
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Dastagir SR, Postigo-Fernandez J, Xu C, Stoeckle JH, Firdessa-Fite R, Creusot RJ. Efficient Presentation of Multiple Endogenous Epitopes to Both CD4 + and CD8 + Diabetogenic T Cells for Tolerance. Mol Ther Methods Clin Dev 2016; 4:27-38. [PMID: 28344989 PMCID: PMC5363322 DOI: 10.1016/j.omtm.2016.12.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 12/13/2016] [Indexed: 10/28/2022]
Abstract
Antigen-specific immunotherapy of type 1 diabetes, typically via delivery of a single native β cell antigen, has had little clinical benefit to date. With increasing evidence that diabetogenic T cells react against multiple β cell antigens, including previously unappreciated neo-antigens that can be emulated by mimotopes, a shift from protein- to epitope-based therapy is warranted. To this end, we aimed to achieve efficient co-presentation of multiple major epitopes targeting both CD4+ and CD8+ diabetogenic T cells. We have compared native epitopes versus mimotopes as well as various targeting signals in an effort to optimize recognition by both types of T cells in vitro. Optimal engagement of all T cells was achieved with segregation of CD8 and CD4 epitopes, the latter containing mimotopes and driven by endosome-targeting signals, after delivery into either dendritic or stromal cells. The CD4+ T cell responses elicited by the endogenously delivered epitopes were comparable with high concentrations of soluble peptide and included functional regulatory T cells. This work has important implications for the improvement of antigen-specific therapies using an epitope-based approach to restore tolerance in type 1 diabetes and in a variety of other diseases requiring concomitant targeting of CD4+ and CD8+ T cells.
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Affiliation(s)
- Shamael R Dastagir
- Columbia Center for Translational Immunology and Department of Medicine, Columbia University Medical Center, New York, NY 10032, USA
| | - Jorge Postigo-Fernandez
- Columbia Center for Translational Immunology and Department of Medicine, Columbia University Medical Center, New York, NY 10032, USA
| | - Chunliang Xu
- Columbia Center for Translational Immunology and Department of Medicine, Columbia University Medical Center, New York, NY 10032, USA
| | - James H Stoeckle
- Columbia Center for Translational Immunology and Department of Medicine, Columbia University Medical Center, New York, NY 10032, USA
| | - Rebuma Firdessa-Fite
- Columbia Center for Translational Immunology and Department of Medicine, Columbia University Medical Center, New York, NY 10032, USA
| | - Rémi J Creusot
- Columbia Center for Translational Immunology and Department of Medicine, Columbia University Medical Center, New York, NY 10032, USA
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29
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Van Regenmortel MHV. Structure-Based Reverse Vaccinology Failed in the Case of HIV Because it Disregarded Accepted Immunological Theory. Int J Mol Sci 2016; 17:E1591. [PMID: 27657055 PMCID: PMC5037856 DOI: 10.3390/ijms17091591] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 08/30/2016] [Accepted: 09/07/2016] [Indexed: 12/14/2022] Open
Abstract
Two types of reverse vaccinology (RV) should be distinguished: genome-based RV for bacterial vaccines and structure-based RV for viral vaccines. Structure-based RV consists in trying to generate a vaccine by first determining the crystallographic structure of a complex between a viral epitope and a neutralizing monoclonal antibody (nMab) and then reconstructing the epitope by reverse molecular engineering outside the context of the native viral protein. It is based on the unwarranted assumption that the epitope designed to fit the nMab will have acquired the immunogenic capacity to elicit a polyclonal antibody response with the same protective capacity as the nMab. After more than a decade of intensive research using this type of RV, this approach has failed to deliver an effective, preventive HIV-1 vaccine. The structure and dynamics of different types of HIV-1 epitopes and of paratopes are described. The rational design of an anti-HIV-1 vaccine is shown to be a misnomer since investigators who claim that they design a vaccine are actually only improving the antigenic binding capacity of one epitope with respect to only one paratope and not the immunogenic capacity of an epitope to elicit neutralizing antibodies. Because of the degeneracy of the immune system and the polyspecificity of antibodies, each epitope studied by the structure-based RV procedure is only one of the many epitopes that the particular nMab is able to recognize and there is no reason to assume that this nMab must have been elicited by this one epitope of known structure. Recent evidence is presented that the trimeric Env spikes of the virus possess such an enormous plasticity and intrinsic structural flexibility that it is it extremely difficult to determine which Env regions are the best candidate vaccine immunogens most likely to elicit protective antibodies.
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Affiliation(s)
- Marc H V Van Regenmortel
- UMR 7242 Biotechnologie et Signalisation Cellulaire, Université de Strasbourg-CNRS, 300, Boulevard Sébastien Brant, CS 10413, 67412 Illkirch Cedex, France.
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30
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Fazekas J, Fürdös I, Singer J, Jensen-Jarolim E. Why man's best friend, the dog, could also benefit from an anti-HER-2 vaccine. Oncol Lett 2016; 12:2271-2276. [PMID: 27698788 PMCID: PMC5038860 DOI: 10.3892/ol.2016.5001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 05/12/2016] [Indexed: 01/11/2023] Open
Abstract
Human epidermal growth factor receptor-2 (HER-2) is a well-established target for anticancer anticancerprecision medicine in humans. A HER-2 homologue with 92% amino acid identity has been described in canine mammary tumors, which whichis termed here as ‘dog epidermal growth factor receptor-2 (DER-2)’, with similar biological implications as those in human breast cancer. Both antigens can principally be immunologically targeted by anti-HER-2 antibodies, such as trastuzumab; however, the in vivo application applicationof humanized antibodies to other species would lead to specific hypersensitivity reactions. Therefore, HER-2 mimotope vaccines that actively induce autologous trastuzumab-like immunoglobulins represent a novel and economic treatment option to overcome species-specific limitations. Thus, the present review proposes the implementation of clinical trials with HER-2 vaccines in canine cancer model modelpatients with spontaneous DER-2 positive mammary gland carcinomas in order to assess their safety and efficacy. This approach would not only pave the way into the veterinary oncology market, but would also similarly generate robust data for human trials and facilitate the testing of novel combinatorial treatments.
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Affiliation(s)
- Judit Fazekas
- Comparative Medicine, The Interuniversity Messerli Research Institute, University of Veterinary Medicine Vienna, Medical University Vienna and University Vienna, Vienna 1210, Austria; Institute of Pathophysiology and Allergy Research, Center of Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna 1090, Austria
| | - Irene Fürdös
- Comparative Medicine, The Interuniversity Messerli Research Institute, University of Veterinary Medicine Vienna, Medical University Vienna and University Vienna, Vienna 1210, Austria
| | - Josef Singer
- Comparative Medicine, The Interuniversity Messerli Research Institute, University of Veterinary Medicine Vienna, Medical University Vienna and University Vienna, Vienna 1210, Austria; Institute of Pathophysiology and Allergy Research, Center of Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna 1090, Austria
| | - Erika Jensen-Jarolim
- Comparative Medicine, The Interuniversity Messerli Research Institute, University of Veterinary Medicine Vienna, Medical University Vienna and University Vienna, Vienna 1210, Austria; Institute of Pathophysiology and Allergy Research, Center of Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna 1090, Austria
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31
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Pomwised R, Intamaso U, Teintze M, Young M, Pincus SH. Coupling Peptide Antigens to Virus-Like Particles or to Protein Carriers Influences the Th1/Th2 Polarity of the Resulting Immune Response. Vaccines (Basel) 2016; 4:vaccines4020015. [PMID: 27164150 PMCID: PMC4931632 DOI: 10.3390/vaccines4020015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Revised: 04/22/2016] [Accepted: 04/26/2016] [Indexed: 11/17/2022] Open
Abstract
We have conjugated the S9 peptide, a mimic of the group B streptococcal type III capsular polysaccharide, to different carriers in an effort to elicit an optimal immune response. As carriers, we utilized the soluble protein keyhole limpet hemocyanin and virus-like particles (VLPs) from two plant viruses, Cowpea Chlorotic Mottle Virus and Cowpea Mosaic Virus. We have found that coupling the peptide to the soluble protein elicits a Th2 immune response, as evidenced by the production of the peptide-specific IgG1 antibody and IL-4/IL-10 production in response to antigen stimulation, whereas the peptide conjugated to VLPs elicited a Th1 response (IgG2a, IFN-γ). Because the VLPs used as carriers package RNA during the assembly process, we hypothesize that this effect may result from the presence of nucleic acid in the immunogen, which affects the Th1/Th2 polarity of the response.
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Affiliation(s)
- Rattanaruji Pomwised
- Department of Microbiology, School of Medicine, Prince of Songkla University, Hadyai, Songkla 90110, Thailand.
| | - Uraiwan Intamaso
- Faculty of Allied Health Sciences, Burapha University, Bangsaen, Chonburi 20131, Thailand.
| | - Martin Teintze
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, MT 59717, USA.
| | - Mark Young
- Department of Plant Sciences, Montana State University, Bozeman, MT 59717, USA.
| | - Seth H Pincus
- Departments of Pediatrics and Microbiology, School of Medicine, Louisianna State University, New Orleans, LA 70118, USA.
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32
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Singer J, Manzano-Szalai K, Fazekas J, Thell K, Bentley-Lukschal A, Stremnitzer C, Roth-Walter F, Weghofer M, Ritter M, Pino Tossi K, Hörer M, Michaelis U, Jensen-Jarolim E. Proof of concept study with an HER-2 mimotope anticancer vaccine deduced from a novel AAV-mimotope library platform. Oncoimmunology 2016; 5:e1171446. [PMID: 27622022 PMCID: PMC5006910 DOI: 10.1080/2162402x.2016.1171446] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Revised: 03/18/2016] [Accepted: 03/21/2016] [Indexed: 01/17/2023] Open
Abstract
Background: Anticancer vaccines could represent a valuable complementary strategy to established therapies, especially in settings of early stage and minimal residual disease. HER-2 is an important target for immunotherapy and addressed by the monoclonal antibody trastuzumab. We have previously generated HER-2 mimotope peptides from phage display libraries. The synthesized peptides were coupled to carriers and applied for epitope-specific induction of trastuzumab-like IgG. For simplification and to avoid methodological limitations of synthesis and coupling chemistry, we herewith present a novel and optimized approach by using adeno-associated viruses (AAV) as effective and high-density mimotope-display system, which can be directly used for vaccination. Methods: An AAV capsid display library was constructed by genetically incorporating random peptides in a plasmid encoding the wild-type AAV2 capsid protein. AAV clones, expressing peptides specifically reactive to trastuzumab, were employed to immunize BALB/c mice. Antibody titers against human HER-2 were determined, and the isotype composition and functional properties of these were tested. Finally, prophylactically immunized mice were challenged with human HER-2 transfected mouse D2F2/E2 cells. Results: HER-2 mimotope AAV-vaccines induced antibodies specific to human HER-2. Two clones were selected for immunization of mice, which were subsequently grafted D2F2/E2 cells. Both mimotope AAV clones delayed the growth of tumors significantly, as compared to controls. Conclusion: In this study, a novel mimotope AAV-based platform was created allowing the isolation of mimotopes, which can be directly used as anticancer vaccines. The example of trastuzumab AAV-mimotopes demonstrates that this vaccine strategy could help to establish active immunotherapy for breast-cancer patients.
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Affiliation(s)
- Josef Singer
- Center of Pathophysiology, Infectiology and Immunology, Institute of Pathophysiology and Allergy Research, Medical University of Vienna, Vienna, Austria; Biomedical International R+D GmbH, Vienna, Austria
| | - Krisztina Manzano-Szalai
- Biomedical International R+D GmbH, Vienna, Austria; Comparative Medicine, Messerli Research Institute of the University of Veterinary Medicine Vienna, Medical University Vienna, and University Vienna, Vienna, Austria
| | - Judit Fazekas
- Center of Pathophysiology, Infectiology and Immunology, Institute of Pathophysiology and Allergy Research, Medical University of Vienna, Vienna, Austria; Comparative Medicine, Messerli Research Institute of the University of Veterinary Medicine Vienna, Medical University Vienna, and University Vienna, Vienna, Austria
| | - Kathrin Thell
- Center of Pathophysiology, Infectiology and Immunology, Institute of Pathophysiology and Allergy Research, Medical University of Vienna, Vienna, Austria; Biomedical International R+D GmbH, Vienna, Austria
| | - Anna Bentley-Lukschal
- Center of Pathophysiology, Infectiology and Immunology, Institute of Pathophysiology and Allergy Research, Medical University of Vienna , Vienna, Austria
| | - Caroline Stremnitzer
- Center of Pathophysiology, Infectiology and Immunology, Institute of Pathophysiology and Allergy Research, Medical University of Vienna , Vienna, Austria
| | - Franziska Roth-Walter
- Comparative Medicine, Messerli Research Institute of the University of Veterinary Medicine Vienna, Medical University Vienna, and University Vienna , Vienna, Austria
| | | | | | | | | | - Uwe Michaelis
- MediGene AG, Martinsried, Germany; ImevaX GmbH Munich, Germany
| | - Erika Jensen-Jarolim
- Center of Pathophysiology, Infectiology and Immunology, Institute of Pathophysiology and Allergy Research, Medical University of Vienna, Vienna, Austria; Biomedical International R+D GmbH, Vienna, Austria; Comparative Medicine, Messerli Research Institute of the University of Veterinary Medicine Vienna, Medical University Vienna, and University Vienna, Vienna, Austria
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Zhang C, Li Y, Tang W, Zhou Z, Sun P, Ma Z. The Relationship between B-cell Epitope and Mimotope Sequences. Protein Pept Lett 2016; 23:132-41. [PMID: 26715528 PMCID: PMC5427807 DOI: 10.2174/0929866523666151230124538] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Revised: 10/30/2015] [Accepted: 11/23/2015] [Indexed: 11/22/2022]
Abstract
B-cell epitope is a group of residues which is on the surface of an antigen. It invokes humoral responses. Locating B-cell epitope is important for effective vaccine design, and the development of diagnostic reagents. Mimotope-based B-cell epitope prediction method is a kind of conformational B-cell epitope prediction, and the core idea of the method is mapping the mimotope sequences which are obtained from a random phage display library. However, current mimotope-based B-cell epitope prediction methods cannot maintain a high degree of satisfaction in the circumstances of employing only mimotope sequences. In this study, we did a multi-perspective analysis on parameters for conformational B-cell epitopes and characteristics between epitope and mimotope on a benchmark datasets which contains 67 mimotope sets, corresponding to 40 unique complex structures. In these 67 cases, there are 25 antigen-antibody complexes and 42 protein-protein interactions. We analyzed the two parts separately. The results showed the mimotope sequences do have some epitope features, but there are also some epitope properties that mimotope sequences do not contain. In addition, the numbers of epitope segments with different lengths were obviously different between the antigen-antibody complexes and the protein-protein interactions. This study reflects how similar do mimotope sequence and genuine epitopes have; and evaluates existing mimotope-based B-cell epitope prediction methods from a novel viewpoint.
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Affiliation(s)
- Chunhua Zhang
- School of Computer Science and Information Technology, Northeast Normal University, Changchun 130117, China
- Key Laboratory of Intelligent Information
Processing of Jilin Universities, Northeast Normal University, Changchun 130117, China
| | - Yunyun Li
- School of Computer Science and Information Technology, Northeast Normal University, Changchun 130117, China
- Ganjingzi District Dalian City Hengyuan Primary School, Dalian 116000, China
| | - Weina Tang
- School of Computer Science and Information Technology, Northeast Normal University, Changchun 130117, China
- Key Laboratory of Intelligent Information
Processing of Jilin Universities, Northeast Normal University, Changchun 130117, China
| | - Zhiguo Zhou
- School of Computer Science and Information Technology, Northeast Normal University, Changchun 130117, China
| | - Pingping Sun
- School of Computer Science and Information Technology, Northeast Normal University, Changchun 130117, China
- National Engineering Laboratory for Druggable Gene and Protein Screening, Northeast Normal University, Changchun 130024, China
- Key Laboratory of Intelligent Information
Processing of Jilin Universities, Northeast Normal University, Changchun 130117, China
| | - Zhiqiang Ma
- School of Computer Science and Information Technology, Northeast Normal University, Changchun 130117, China
- Key Laboratory of Intelligent Information
Processing of Jilin Universities, Northeast Normal University, Changchun 130117, China
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Kim HJ, Lee HJ, Choi JS, Han J, Kim JY, Na HK, Joung HJ, Kim YS, Binas B. An apolipoprotein B100 mimotope prevents obesity in mice. Clin Sci (Lond) 2016; 130:105-16. [PMID: 26519425 DOI: 10.1042/CS20150423] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 10/30/2015] [Indexed: 01/09/2023]
Abstract
Immunization with an ApoB100 mimotope prevents high-fat-diet-induced obesity in mice. Antibody titres parallel the weight decrements. In vitro data implicate increased lipolysis and reduced lipoprotein uptake by adipocytes, as well as increased uptake and metabolism of native lipoprotein by macrophages. Although apolipoprotein B100 (ApoB100) plays a key role in peripheral fat deposition, it is not considered a suitable therapeutic target in obesity. In the present study we describe a novel ApoB100 mimotope, peptide pB1, and the use of pB1-based vaccine-like formulations (BVFs) against high-fat diet (HFD)-induced obesity. In HFD- compared with chow-fed adolescent mice, BVFs reduced the 3-month body-weight gains attributable to increased dietary fat by 44–65%, and prevented mesenteric fat accumulation and liver steatosis. The body-weight reductions paralleled the titres of pB1-reactive immunoglobulin G (IgG) antibodies, and pB1-reactive antibodies specifically recognized native ApoB100 and a synthetic peptide from the C-terminal half of ApoB100. In cultured 3T3L1 adipocytes, anti-pB1 antibodies increased lipolysis and inhibited low-density lipoprotein (LDL) uptake. In cultured RAW 264.7 macrophages, the same antibodies enhanced LDL uptake (without causing foam cell formation). These findings make ApoB100 a promising target for an immunization strategy against HFD-induced obesity.
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Lukschal A, Wallmann J, Bublin M, Hofstetter G, Mothes-Luksch N, Breiteneder H, Pali-Schöll I, Jensen-Jarolim E. Mimotopes for Api g 5, a Relevant Cross-reactive Allergen, in the Celery-Mugwort-Birch-Spice Syndrome. Allergy Asthma Immunol Res 2015; 8:124-31. [PMID: 26739405 PMCID: PMC4713875 DOI: 10.4168/aair.2016.8.2.124] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2014] [Revised: 05/22/2015] [Accepted: 07/09/2015] [Indexed: 11/20/2022]
Abstract
PURPOSE In the celery-mugwort-birch-spice syndrome, a significant proportion of IgE is directed against high molecular weight (HMW) glycoproteins, including the celery allergen Api g 5. BIP3, a monoclonal antibody originally raised against birch pollen, recognizes HMW allergens in birch and mugwort pollens, celery, and Apiaceae spices. Our aim was to generate mimotopes using BIP3 for immunization against the HMW allergens relevant in the celery-mugwort-birch-spice cross reactivity syndrome. METHODS Mimotopes were selected from a random-peptide display library by BIP3 and applied in IgE inhibition assays. The 3 phage clones with the highest inhibitory capacity were chosen for immunization of BALB/c mice. Mouse immune sera were tested for IgG binding to blotted birch pollen extract and used for inhibiting patients' IgE binding. Furthermore, sera were tested for binding to Api g 5, to horseradish peroxidase (HRP) as a second glycoprotein, or to non-glycosylated control allergen Phl p 5 in ELISA, and the specific Api g 5-specific IgG titers were determined. RESULTS Three rounds of biopanning resulted in phage clones exhibiting 7 different sequences including 1 dominant, 1-6-cyclo-CHKLRCDKAIA. Three phage clones had the capacity to inhibit human IgE binding and induced IgG to the HMW antigen when used for immunizing BALB/c mice. The induced BIP3-mimotope IgG reached titers of 1:500 specifically to Api g 5, but hardly reacted to glycoprotein HRP, revealing a minor role of carbohydrates in their epitope. CONCLUSIONS The mimotopes characterized in this study mimic the epitope of BIP3 relevant for Api g 5, one of the cross-reactive HMW allergens relevant in the celery-mugwort-birch-spice syndrome. BIP3 mimotopes may be used in the future for hyposensitization in this clinical syndrome by virtue of good and specific immunogenicity.
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Affiliation(s)
- Anna Lukschal
- Department of Comparative Medicine, Messerli Research Institute of the University of Veterinary Medicine Vienna, the Medical University of Vienna and the University of Vienna, Vienna, Austria
| | - Julia Wallmann
- Department of Comparative Medicine, Messerli Research Institute of the University of Veterinary Medicine Vienna, the Medical University of Vienna and the University of Vienna, Vienna, Austria
| | - Merima Bublin
- Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Gerlinde Hofstetter
- Department of Comparative Medicine, Messerli Research Institute of the University of Veterinary Medicine Vienna, the Medical University of Vienna and the University of Vienna, Vienna, Austria
| | | | - Heimo Breiteneder
- Department of Comparative Medicine, Messerli Research Institute of the University of Veterinary Medicine Vienna, the Medical University of Vienna and the University of Vienna, Vienna, Austria
| | - Isabella Pali-Schöll
- Department of Comparative Medicine, Messerli Research Institute of the University of Veterinary Medicine Vienna, the Medical University of Vienna and the University of Vienna, Vienna, Austria
| | - Erika Jensen-Jarolim
- Department of Comparative Medicine, Messerli Research Institute of the University of Veterinary Medicine Vienna, the Medical University of Vienna and the University of Vienna, Vienna, Austria.,Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria.
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Asadi-Ghalehni M, Ghaemmaghami M, Klimka A, Javanmardi M, Navari M, Rasaee MJ. Cancer immunotherapy by a recombinant phage vaccine displaying EGFR mimotope: an in vivo study. Immunopharmacol Immunotoxicol 2015; 37:274-9. [PMID: 25990849 DOI: 10.3109/08923973.2015.1027917] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
To date, several small molecule inhibitors and monoclonal-antibodies (like ICR-62) have been used to treat tumors over-expressing epidermal growth factor receptor (EGFR). However, the limitations associated with these conventional applications accentuate the necessity of alternative approaches. Mimotopes as compelling molecular tools could rationally be employed to circumvent these drawbacks. In the present study, an M13 phage displaying ICR-62 binding peptide mimotope is exploited as a vaccine candidate. It exhibited high affinity towards ICR62 and polyclonal anti-P-BSA antibodies. Following the mice immunization, phage-based mimotope vaccine induced humoral immunity. Elicited anti-EGFR mimotope antibodies were detected using ELISA method. Moreover, the phage vaccine was tested on the Lewis lung carcinoma mice model to investigate the prophylactic and therapeutic effects. The tumor volume was measured and recorded in different animal groups to evaluate the anti-tumor effects of the vaccine. Our data indicate that the reported phage-based mimotope could potentially elicit specific antibodies resulting in low titers of EGFR-specific antibodies and reduced tumor growth. However, in vivo experiments of prophylactic or therapeutic vaccination showed no specific advantage. Furthermore, phage-mimotope vaccine might be a promising approach in the field of cancer immunotherapy.
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Affiliation(s)
- Majid Asadi-Ghalehni
- Department of Medical Biotechnology, Faculty of Medical Sciences, Tarbiat Modares University , Tehran , Iran and
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Abstract
Tumor-associated antigen (TAA)-targeting mimotope peptides exert more prominent immunostimulatory functions than unmodified TAAs, with the caveat that some T-cell clones exhibit a relatively low affinity for TAAs. Combining mimotope-based vaccines with native TAAs in a prime-boost setting significantly improves antitumor immunity.
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Affiliation(s)
- Jonathan D Buhrman
- Integrated Department of Immunology; University of Colorado School of Medicine; Denver CO, USA
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Navari M, Zare M, Javanmardi M, Asadi-Ghalehni M, Modjtahedi H, Rasaee MJ. Epitope mapping of epidermal growth factor receptor (EGFR) monoclonal antibody and induction of growth-inhibitory polyclonal antibodies by vaccination with EGFR mimotope. Immunopharmacol Immunotoxicol 2014; 36:309-15. [PMID: 25070131 DOI: 10.3109/08923973.2014.945127] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
One of the proposed approaches in cancer therapy is to induce and direct the patient's own immune system against cancer cells. In this study, we determined the epitope mapping of the rat anti-human epidermal growth factor receptor (EGFR) monoclonal antibody ICR-62 using a phage display of random peptide library and identified a 12 amino acids peptide, which was recognized as a mimotope. The peptide was synthesized and conjugated to bovine serum albumin (BSA) as carrier protein (P-BSA). We have shown that ICR-62 can react specifically with P-BSA as well as native EGFR. Two rabbits were immunized either by BSA or P-BSA and the rabbits IgGs were purified and examined for binding to the antigens, mimotope and the EGFR protein purified from the EGFR overexpressing A431 cell line. We showed that the rabbit IgG generated against the mimotope is capable of inhibiting the growth of A431 cells by 15%, but does not have any effect on the growth of EGFR-negative MDA-MB-453 cell line in vitro. Our results support the need for further investigations on the potential of vaccination with either mimotope of the EGFR or epitope displayed on the surface of phage particles for use in active immunotherapy of cancer.
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Affiliation(s)
- Mohsen Navari
- Department of Medical Biotechnology, School of Medical Sciences, Tarbiat Modares University , Tehran , Islamic Republic of Iran and
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Kieber-Emmons T, Saha S, Pashov A, Monzavi-Karbassi B, Murali R. Carbohydrate-mimetic peptides for pan anti-tumor responses. Front Immunol 2014; 5:308. [PMID: 25071769 PMCID: PMC4075079 DOI: 10.3389/fimmu.2014.00308] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Accepted: 06/17/2014] [Indexed: 11/26/2022] Open
Abstract
Molecular mimicry is fundamental to biology and transcends to many disciplines ranging from immune pathology to drug design. Structural characterization of molecular partners has provided insight into the origins and relative importance of complementarity in mimicry. Chemical complementarity is easy to understand; amino acid sequence similarity between peptides, for example, can lead to cross-reactivity triggering similar reactivity from their cognate receptors. However, conformational complementarity is difficult to decipher. Molecular mimicry of carbohydrates by peptides is often considered one of those. Extensive studies of innate and adaptive immune responses suggests the existence of carbohydrate mimicry, but the structural basis for this mimicry yields confounding details; peptides mimicking carbohydrates in some cases fail to exhibit both chemical and conformational mimicry. Deconvolution of these two types of complementarity in mimicry and its relationship to biological function can nevertheless lead to new therapeutics. Here, we discuss our experience examining the immunological aspects and implications of carbohydrate-peptide mimicry. Emphasis is placed on the rationale, the lessons learned from the methodologies to identify mimics, a perspective on the limitations of structural analysis, the biological consequences of mimicking tumor-associated carbohydrate antigens, and the notion of reverse engineering to develop carbohydrate-mimetic peptides in vaccine design strategies to induce responses to glycan antigens expressed on cancer cells.
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Affiliation(s)
- Thomas Kieber-Emmons
- Department of Pathology and Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Somdutta Saha
- Department of Pathology and Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Anastas Pashov
- Stephan Angelov Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Behjatolah Monzavi-Karbassi
- Department of Pathology and Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Ramachandran Murali
- Research Division of Immunology, Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, USA
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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] [What about the content of this article? (0)] [Affiliation(s)] [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.
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Affiliation(s)
- Misa Saito
- Department of Clinical Pharmacology and Genetics, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, Japan
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Wang Y, Wang H, Li P, Zhang Q, Kim HJ, Gee SJ, Hammock BD. Phage-displayed peptide that mimics aflatoxins and its application in immunoassay. J Agric Food Chem 2013; 61:2426-33. [PMID: 23394544 PMCID: PMC3830680 DOI: 10.1021/jf4004048] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
To search for an alternative to using protein conjugated aflatoxin as a coating antigen in aflatoxin detection by an ELISA method, a random-8-peptide library was constructed and used as a source of peptides that mimic aflatoxins (termed as mimotopes). Five mimotope peptides were obtained by panning-elution from the library and were successfully used in an indirect competitive ELISA for analyzing total aflatoxin concentration. The assay exhibited an IC50 value of 14 μg/kg in samples (with 1 in 7 dilution of sample extract) for aflatoxins. The linear range is 4-24 μg/kg. Further validation indicated relatively good recovery (60-120%) in peanut, rice and corn. Natural contaminated samples (peanut and feedstuff) were analyzed for aflatoxin concentration by both conventional ELISA and phage ELISA. The results showed good correlation. It can be concluded that the mimotope preparation is an effective substitute for the aflatoxin based coating antigen in ELISA and can be used in real sample analysis.
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Affiliation(s)
- Yanru Wang
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan, 430062, P. R. China
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan, 430062, P. R. China
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture, Wuhan, 430062, P.R. China
- Laboratory of Risk Assessment for Oilseeds Products (Wuhan), Ministry of Agriculture, 430062, P. R. China
| | - Hong Wang
- Department of Entomology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States
| | - Peiwu Li
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan, 430062, P. R. China
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan, 430062, P. R. China
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture, Wuhan, 430062, P.R. China
- Laboratory of Risk Assessment for Oilseeds Products (Wuhan), Ministry of Agriculture, 430062, P. R. China
- Corresponding Authors Tel: +86 27 86812943; Fax: +86 27 86812862;
| | - Qi Zhang
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan, 430062, P. R. China
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture, Wuhan, 430062, P.R. China
| | - Hee Joo Kim
- Department of Entomology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States
| | - Shirley J. Gee
- Department of Entomology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States
| | - Bruce D. Hammock
- Department of Entomology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States
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Schiavone M, Fiume G, Caivano A, de Laurentiis A, Falcone C, Masci FF, Iaccino E, Mimmi S, Palmieri C, Pisano A. Design and characterization of a peptide mimotope of the HIV-1 gp120 bridging sheet. Int J Mol Sci. 2012;13:5674-5699. [PMID: 22754323 PMCID: PMC3382813 DOI: 10.3390/ijms13055674] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Revised: 04/26/2012] [Accepted: 05/02/2012] [Indexed: 01/02/2023] Open
Abstract
The Bridging Sheet domain of HIV-1 gp120 is highly conserved among the HIV-1 strains and allows HIV-1 binding to host cells via the HIV-1 coreceptors. Further, the bridging sheet domain is a major target to neutralize HIV-1 infection. We rationally designed four linear peptide epitopes that mimic the three-dimensional structure of bridging sheet by using molecular modeling. Chemically synthesized peptides BS3 and BS4 showed a fair degree of antigenicity when tested in ELISA with IgG purified from HIV(+) broadly neutralizing sera while the production of synthetic peptides BS1 and BS2 failed due to their high degree of hydrophobicity. To overcome this limitation, we linked all four BS peptides to the COOH-terminus of GST protein to test both their antigenicity and immunogenicity. Only the BS1 peptide showed good antigenicity; however, no envelope specific antibodies were elicited upon mice immunization. Therefore we performed further analyses by linking BS1 peptide to the NH2-terminus of the E2 scaffold from the Geobacillus Stearothermophylus PDH complex. The E2-BS1 fusion peptide showed good antigenic results, however only one immunized rabbit elicited good antibody titers towards both the monomeric and oligomeric viral envelope glycoprotein (Env). In addition, moderate neutralizing antibodies response was elicited against two HIV-1 clade B and one clade C primary isolates. These preliminary data validate the peptide mimotope approach as a promising tool to obtain an effective HIV-1 vaccine.
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Shanmugam A, Suriano R, Goswami N, Chaudhuri D, Ashok BT, Rajoria S, George AL, Mittelman A, Tiwari RK. Identification of peptide mimotopes of gp96 using single-chain antibody library. Cell Stress Chaperones 2011; 16:225-34. [PMID: 20953748 PMCID: PMC3059791 DOI: 10.1007/s12192-010-0234-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2010] [Revised: 09/17/2010] [Accepted: 09/21/2010] [Indexed: 10/18/2022] Open
Abstract
Heat shock proteins such as gp96 are immunogenic and are widely used as vaccines in immunotherapy of cancers. The present study focuses on the use of peptide mimotopes as immunotherapeutic vaccines for prostate cancer. To this end, we developed a 15-mer gp96 peptide mimotope specifically reactive to MAT-LyLu gp96-peptide complex using combinatorial single-chain antibody and peptide phage display library. The immunogenicity of the synthesized gp96 mimotope was analyzed initially in normal BALB/c mice in combination with various adjuvants such as complete Freund's adjuvant (CFA), aluminum salts (ALUM), granulocyte-macrophage colony-stimulating factor (GM-CSF), and liposome, of which CFA served as a positive control. The antibody response was determined and found that the gp96 mimotope with ALUM showed a significant increase in antibody titer, followed by GM-CSF and liposomes. Further, the T cell (CD4(+) and CD8(+)) populations from splenocytes, as well as IgG isotypes, interleukin-4, and interleukin-5 of gp96 mimotope with ALUM-immunized animals, were analyzed. The results suggest that the gp96 mimotope may elicit a potent and effective antitumor antibody response. Further, the study identifies ALUM and GM-CSF as adjuvant options to drive an appropriate protective immune response as these adjuvants have prior use in humans.
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Affiliation(s)
- Arulkumaran Shanmugam
- Department of Microbiology and Immunology, New York Medical College, Valhalla, NY 10595 USA
| | - Robert Suriano
- Department of Microbiology and Immunology, New York Medical College, Valhalla, NY 10595 USA
| | - Neha Goswami
- Department of Microbiology and Immunology, New York Medical College, Valhalla, NY 10595 USA
| | - Devyani Chaudhuri
- Department of Microbiology and Immunology, New York Medical College, Valhalla, NY 10595 USA
| | - Badithe T. Ashok
- Department of Microbiology and Immunology, New York Medical College, Valhalla, NY 10595 USA
| | - Shilpi Rajoria
- Department of Microbiology and Immunology, New York Medical College, Valhalla, NY 10595 USA
| | - Andrea L. George
- Department of Microbiology and Immunology, New York Medical College, Valhalla, NY 10595 USA
| | - Abraham Mittelman
- Department of Microbiology and Immunology, New York Medical College, Valhalla, NY 10595 USA
| | - Raj K. Tiwari
- Department of Microbiology and Immunology, New York Medical College, Valhalla, NY 10595 USA
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Yang L, Jiang H, Shi B, Wang H, Li J, Wang H, Yao M, Li Z. Identification and characterization of Ch806 mimotopes. Cancer Immunol Immunother 2010; 59:1481-7. [PMID: 20544195 PMCID: PMC11030776 DOI: 10.1007/s00262-010-0872-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2010] [Accepted: 05/20/2010] [Indexed: 11/26/2022]
Abstract
The chimeric antibody 806 (Ch806) is a promising antitumor agent that recognizes both the epidermal growth factor receptor variant III (EGFRvIII) and the overexpressed epidermal growth factor receptor (EGFR) in cancer tissues but does not recognize the wild type EGFR in normal tissues. However, passive antibody immunization could not produce effective antitumor titers unless the immunization was administered repeatedly over long periods. To overcome this limitation, we generated epitope mimics that bind to Ch806 and tested whether the peptide mimics could induce the production of similar antibodies when actively immunizing mice with the peptides. We used the PH.D-12 phage display peptide library to identify peptides that bind to the monoclonal antibody (mAb) 12H23, which also recognizes similar epitopes of Ch806. Two mimotopes (WHTEILKSYPHE and LPAFFVTNQTQD) were shown to mimic the mAb 12H23 and Ch806 epitope using immunoassays. The mimotopes were conjugated to immunogenic carrier proteins and used to intraperitoneally immunize BALB/c mice. Interestingly, sera from the mice immunized with the isolated mimotopes not only recognize the recombinant or synthetic 806 eptitope, but can also recognize EGFR that is overexpressed in A431 cells and EGFRvIII expressed in Huh7-EGFRvIII cells, whereas sera from mice immunized with the control peptide-KLH (keyhole limpet hemocyanin) and carrier KLH alone failed to show a similar reactivity. Furthermore, in an antibody-dependent cellular cytotoxicity assay (ADCC), the mimotope-induced antibodies specifically lysed human Huh-7-EGFRvIII cells. Our data indicate that the isolated mimotopes reported here may potentially be used as new alternative agents for treating cancer with EGFRvIII expression or EGFR overexpression.
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Affiliation(s)
- Lin Yang
- Shanghai Medical College, Fudan University, No. 130, Dong’an Road, Shanghai, 200032 China
| | - Hua Jiang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Medical School of Shanghai JiaoTong University, No. 25/Ln. 2200, XieTu Road, Shanghai, 200032 China
| | - Bizhi Shi
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Medical School of Shanghai JiaoTong University, No. 25/Ln. 2200, XieTu Road, Shanghai, 200032 China
| | - Huamao Wang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Medical School of Shanghai JiaoTong University, No. 25/Ln. 2200, XieTu Road, Shanghai, 200032 China
- Institute of Bioengineering, Zhejiang Academy of Medical Science, Hangzhou, China
| | - Jinjun Li
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Medical School of Shanghai JiaoTong University, No. 25/Ln. 2200, XieTu Road, Shanghai, 200032 China
| | - Hai Wang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Medical School of Shanghai JiaoTong University, No. 25/Ln. 2200, XieTu Road, Shanghai, 200032 China
| | - Ming Yao
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Medical School of Shanghai JiaoTong University, No. 25/Ln. 2200, XieTu Road, Shanghai, 200032 China
| | - Zonghai Li
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Medical School of Shanghai JiaoTong University, No. 25/Ln. 2200, XieTu Road, Shanghai, 200032 China
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Saphire EO, Montero M, Menendez A, van Houten NE, Irving MB, Pantophlet R, Zwick MB, Parren PWHI, Burton DR, Scott JK, Wilson IA. Structure of a high-affinity " mimotope" peptide bound to HIV-1-neutralizing antibody b12 explains its inability to elicit gp120 cross-reactive antibodies. J Mol Biol 2007; 369:696-709. [PMID: 17445828 PMCID: PMC1995417 DOI: 10.1016/j.jmb.2007.01.060] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2006] [Revised: 01/20/2007] [Accepted: 01/23/2007] [Indexed: 11/26/2022]
Abstract
The human antibody b12 recognizes a discontinuous epitope on gp120 and is one of the rare monoclonal antibodies that neutralize a broad range of primary human immunodeficiency virus type 1 (HIV-1) isolates. We previously reported the isolation of B2.1, a dimeric peptide that binds with high specificity to b12 and competes with gp120 for b12 antibody binding. Here, we show that the affinity of B2.1 was improved 60-fold over its synthetic-peptide counterpart by fusing it to the N terminus of a soluble protein. This affinity, which is within an order of magnitude of that of gp120, probably more closely reflects the affinity of the phage-borne peptide. The crystal structure of a complex between Fab of b12 and B2.1 was determined at 1.8 A resolution. The structural data allowed the differentiation of residues that form critical contacts with b12 from those required for maintenance of the antigenic structure of the peptide, and revealed that three contiguous residues mediate B2.1's critical contacts with b12. This single region of critical contact between the B2.1 peptide and the b12 paratope is unlikely to mimic the discontinuous key binding residues involved in the full b12 epitope for gp120, as previously identified by alanine scanning substitutions on the gp120 surface. These structural observations are supported by experiments that demonstrate that B2.1 is an ineffective immunogenic mimic of the b12 epitope on gp120. Indeed, an extensive series of immunizations with B2.1 in various forms failed to produce gp120 cross-reactive sera. The functional and structural data presented here, however, suggest that the mechanism by which b12 recognizes the two antigens is very different. Here, we present the first crystal structure of peptide bound to an antibody that was originally raised against a discontinuous protein epitope. Our results highlight the challenge of producing immunogens that mimic discontinuous protein epitopes, and the necessity of combining complementary experimental approaches in analyzing the antigenic and immunogenic properties of putative molecular mimics.
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Affiliation(s)
- Erica Ollmann Saphire
- Department of Immunology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
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Riemer AB, Hantusch B, Sponer B, Kraml G, Hafner C, Zielinski CC, Scheiner O, Pehamberger H, Jensen-Jarolim E. High-molecular-weight melanoma-associated antigen mimotope immunizations induce antibodies recognizing melanoma cells. Cancer Immunol Immunother 2005; 54:677-84. [PMID: 15565329 PMCID: PMC11034292 DOI: 10.1007/s00262-004-0632-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2004] [Accepted: 09/30/2004] [Indexed: 10/26/2022]
Abstract
Size and posttranslational modifications are obstacles in the recombinant expression of high-molecular-weight melanoma-associated antigen (HMW-MAA). Creating a tumor antigen mimic via the phage display technology may be a means to overcome this problem for vaccine design. In this study, we aimed to generate an immunogenic epitope mimic of HMW-MAA. Therefore we screened a linear 9mer phage display peptide library, using the anti-HMW-MAA monoclonal antibody (mAb) 225.28S. This antibody mediates antibody-dependent cellular cytotoxicity (ADCC) and has already been used for anti-idiotype therapy trials. Fifteen peptides were selected by mAb 225.28S in the biopanning procedure. They share a consensus sequence, but show only partial homology to the amino acid sequence of the HMW-MAA core protein, indicating mimicry with a conformational epitope. One mimotope was chosen to be fused to albumin binding protein (ABP) as an immunogenic carrier. Immunoassays with 225.28S indicated that the mimotope fusion protein was folded correctly. Subsequently, the fusion protein was tested for immunogenicity in BALB/c mice. The induced anti-mimotope antibodies recognized HMW-MAA of 518A2 human melanoma cells, whereas sera of mice immunized with the carrier ABP alone showed no reactivity. These anti-mimotope antibodies were capable of inducing specific lysis of 518A2 melanoma cells in ADCC assays with murine effector cells. In conclusion, the presented data indicate that mimotopes fused to an immunogenic carrier are suitable tools to elicit epitope-specific anti-melanoma immune responses.
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Affiliation(s)
- Angelika B. Riemer
- Department of Pathophysiology, Center of Physiology & Pathophysiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria
- BioLife Science GmbH, Vienna, Austria
| | - Brigitte Hantusch
- Department of Pathophysiology, Center of Physiology & Pathophysiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria
| | - Barbara Sponer
- Department of Pathophysiology, Center of Physiology & Pathophysiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria
| | - Georg Kraml
- Department of Pathophysiology, Center of Physiology & Pathophysiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria
| | - Christine Hafner
- Department of Pathophysiology, Center of Physiology & Pathophysiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria
| | - Christoph C. Zielinski
- BioLife Science GmbH, Vienna, Austria
- Department of Medicine I, Clinical Division of Oncology, Medical University of Vienna, Vienna, Austria
| | - Otto Scheiner
- Department of Pathophysiology, Center of Physiology & Pathophysiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria
- BioLife Science GmbH, Vienna, Austria
| | - Hubert Pehamberger
- BioLife Science GmbH, Vienna, Austria
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Erika Jensen-Jarolim
- Department of Pathophysiology, Center of Physiology & Pathophysiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria
- BioLife Science GmbH, Vienna, Austria
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Lenstra JA, Erkens JH, Langeveld JG, Posthumus WP, Meloen RH, Gebauer F, Correa I, Enjuanes L, Stanley KK. Isolation of sequences from a random-sequence expression library that mimic viral epitopes. J Immunol Methods 1992; 152:149-57. [PMID: 1380046 PMCID: PMC7131437 DOI: 10.1016/0022-1759(92)90136-h] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
We describe the use of random peptide sequences for the mapping of antigenic determinants. An oligonucleotide with a completely degenerate sequence of 17 or 23 nucleotides was inserted into a bacterial expression vector. This resulted in an expression library producing random hexa- or octapeptides attached to a beta-galactosidase hybrid protein. Mimotopes, or antigenic sequences that mimic an epitope, were selected by immunoscreening of colonies with monoclonal antibodies, which were specific for antigenic sites on the spike protein of the coronavirus transmissible gastroenteritis virus. We report one mimotope for antigenic site II, eight for site III and one for site IV. The site III and site IV mimotopes were closely similar to the corresponding linear epitopes, localized previously in the amino acid sequence of the S protein. An alignment of the site II mimotope and the sequence of the S protein around Trp97, which is substituted in escape mutants, suggests that this mimotope mimics a conformational epitope located around residues 97-103. Applications of mimotopes to epitope mapping, serodiagnosis and vaccine development are discussed.
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Affiliation(s)
- J A Lenstra
- Institute of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht, Netherlands
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