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Liu Y, Lin S, Liu K, Wang S, Liu Q, Sun N. Exploration of digestion-resistant immunodominant epitopes in shrimp (Penaeus vannamei) allergens. Food Chem 2024; 438:137920. [PMID: 38000156 DOI: 10.1016/j.foodchem.2023.137920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Revised: 10/23/2023] [Accepted: 10/30/2023] [Indexed: 11/26/2023]
Abstract
The digestion products of Penaeus vannamei still had sensitizing and eliciting capacity; however, the underlying mechanism has not been identified. This study analyzed the structural changes of shrimp proteins during digestion, predicted the linearmimotopepeptides and first validated the allergenicity of immunodominantepitopes with binding ability. The results showed that the shrimp proteins were gradually degraded into small peptides during digestion, which might lead to the destruction of linear epitopes. However, these peptides carried IgE epitopes that still trigger allergic reactions. Eighteen digestion-resistant epitopes were predicted by multiple immunoinformatics tools and digestomics. Five epitopes contained more critical amino acids and had strong molecular docking (P1: DSGVGIYAPDAEA, P2: EGELKGTYYPLTGM, P3: GRQGDPHGKFDLPPGV, P4: IFAWPHKDNNGIE, P5: KSTESSVTVPDVPSIHD), and these epitopes were identified as novel IgE binding immunodominantepitopes in Penaeus vannamei. These findings provide novel insight into allergenic epitopes, which might serve as key targets for reducing the allergenicity in shrimp.
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Affiliation(s)
- Yao Liu
- SKL of Marine Food Processing & Safety Control, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China; National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, PR China
| | - Songyi Lin
- SKL of Marine Food Processing & Safety Control, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China; National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, PR China; Engineering Research Center of Special Dietary Food, the Education Department of Liaoning Province, Dalian 116034, PR China
| | - Kexin Liu
- SKL of Marine Food Processing & Safety Control, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China; National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, PR China
| | - Shan Wang
- SKL of Marine Food Processing & Safety Control, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China; National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, PR China
| | - Qiaozhen Liu
- SKL of Marine Food Processing & Safety Control, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China; National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, PR China
| | - Na Sun
- SKL of Marine Food Processing & Safety Control, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China; National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, PR China; Engineering Research Center of Food, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China.
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2
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Shams MH, Sohrabi SM, Jafari R, Sheikhian A, Motedayyen H, Baharvand PA, Hasanvand A, Fouladvand A, Assarehzadegan MA. Designing a T-cell epitope-based vaccine using in silico approaches against the Sal k 1 allergen of Salsola kali plant. Sci Rep 2024; 14:5040. [PMID: 38424208 PMCID: PMC10904830 DOI: 10.1038/s41598-024-55788-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Accepted: 02/27/2024] [Indexed: 03/02/2024] Open
Abstract
Allergens originated from Salsola kali (Russian thistle) pollen grains are one of the most important sources of aeroallergens causing pollinosis in desert and semi-desert regions. T-cell epitope-based vaccines (TEV) are more effective among different therapeutic approaches developed to alleviate allergic diseases. The physicochemical properties, and B as well as T cell epitopes of Sal k 1 (a major allergen of S. kali) were predicted using immunoinformatic tools. A TEV was constructed using the linkers EAAAK, GPGPG and the most suitable CD4+ T cell epitopes. RS04 adjuvant was added as a TLR4 agonist to the amino (N) and carboxyl (C) terminus of the TEV protein. The secondary and tertiary structures, solubility, allergenicity, toxicity, stability, physicochemical properties, docking with immune receptors, BLASTp against the human and microbiota proteomes, and in silico cloning of the designed TEV were assessed using immunoinformatic analyses. Two CD4+ T cell epitopes of Sal k1 that had high affinity with different alleles of MHC-II were selected and used in the TEV. The molecular docking of the TEV with HLADRB1, and TLR4 showed TEV strong interactions and stable binding pose to these receptors. Moreover, the codon optimized TEV sequence was cloned between NcoI and XhoI restriction sites of pET-28a(+) expression plasmid. The designed TEV can be used as a promising candidate in allergen-specific immunotherapy against S. kali. Nonetheless, effectiveness of this vaccine should be validated through immunological bioassays.
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Affiliation(s)
- Mohammad Hossein Shams
- Hepatitis Research Center and Department of Medical Immunology, School of Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran.
| | - Seyyed Mohsen Sohrabi
- Department of Production Engineering and Plant Genetic, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Box 6814993165, Ahvaz, Iran
| | - Reza Jafari
- School of Allied Medical Sciences, Shahroud University of Medical Sciences, Shahroud, Iran
| | - Ali Sheikhian
- Hepatitis Research Center and Department of Medical Immunology, School of Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Hossein Motedayyen
- Autoimmune Diseases Research Center, Kashan University of Medical Sciences, Kashan, Iran
| | - Peyman Amanolahi Baharvand
- Hepatitis Research Center and Department of Medical Immunology, School of Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Amin Hasanvand
- Department of Physiology and Pharmacology, School of Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Ali Fouladvand
- Hepatitis Research Center and Department of Medical Immunology, School of Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Mohammad-Ali Assarehzadegan
- Immunology Research Center, Department of Immunology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
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3
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Santos SP, Lisboa AB, Silva FS, Tiwari S, Azevedo V, Cruz ÁA, Silva ES, Pinheiro CS, Alcantara-Neves NM, Pacheco LG. Rationally designed hypoallergenic mutant variants of the house dust mite allergen Der p 21. Biochim Biophys Acta Gen Subj 2022; 1866:130096. [DOI: 10.1016/j.bbagen.2022.130096] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 12/22/2021] [Accepted: 01/17/2022] [Indexed: 11/29/2022]
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4
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Immunological characterization of the American cockroach allergen Per a 9 expressed in baculovirus-infected insect cells. Cent Eur J Immunol 2019; 44:322-326. [PMID: 31871421 PMCID: PMC6925565 DOI: 10.5114/ceji.2019.89611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 12/28/2016] [Indexed: 11/18/2022] Open
Abstract
American cockroach (CR) allergy has been recognized as important IgE-mediated type I hypersensitivity. Per a 9 is an arginine kinase, reacting with IgE in sera of all CR allergic Thai patients. Per a 9 gene was cloned and expressed in eukaryotic systems (baculovirus-infected insect cells). The expressed Per a 9 was purified by Nickel column. The antigenicities were analyzed by ELISA, immunoblot analysis and basophile activation test. The results show that 13 out of 16 (81.3%) sera from American CR patients reacted to Per a 9, confirming that Per a 9 is a major allergen of CR. The IgE reactivity of Per a 9 in the sera from American CR patients was increased 8.3-fold in comparison with the sera from healthy controls. Per a 9 at 1.0 μg/ml induced an approximately up to 5.6-fold increase in CD63 and CCR3 double positive cells when incubating with passively sensitized basophils from by sera from American CR patients.
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5
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In Silico Design of Epitope-Based Allergy Vaccine Against Bellatella germanica Cockroach Allergens. Int J Pept Res Ther 2019. [DOI: 10.1007/s10989-019-09980-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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6
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Chen D, Fu Q, Lin J, Hu C, Huang N, Chang KX, Sun B, Liu Z. Gene synthesizing, expression and immunogenicity characterization of recombinant translation elongation factor 2 from Dermatophagoides farinae. Mol Med Rep 2019; 20:5324-5334. [PMID: 31702815 PMCID: PMC6854542 DOI: 10.3892/mmr.2019.10786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2018] [Accepted: 09/04/2019] [Indexed: 11/06/2022] Open
Abstract
House dust mite (HDM) hypersensitivity increasingly affects millions of individuals worldwide. Although numerous major allergens produced by HDM species have been characterized, some of the less potent allergens remain to be studied. The present study aimed to obtain the recombinant allergen of Translation Elongation Factor 2 (TEF 2) from the HDM Dermatophagoides farinae by synthesizing, and then expressing the recombinant TEF 2 to identify its immunogenicity. In the present study, the D. farinae TEF 2 (Der f TEF 2) was synthesized, expressed and purified. The molecular characteristics of Der f TEF 2 were analyzed using bioinformatics approaches. The recombinant protein was purified via affinity chromatography, and the allergenicity was assessed using immunoblotting, ELISAs and skin prick tests. The gene for TEF 2 consists of 2,535 bp and encodes an 844‑amino acid protein. A positive response to recombinant Der f TEF 2 was detected in 16.2% of 37 patients with HDM allergies using skin prick tests. In addition, the immunoblotting indicated that the protein showed a high ability to bind serum IgE from patients allergic to HDMs, and that the recombinant TEF 2 was highly immunogenic. Bioinformatics analysis predicted 17 peptides as B cell epitopes (amino acids 29‑35, 55‑64, 92‑99, 173‑200, 259‑272, 311‑318, 360‑365, 388‑395, 422‑428, 496‑502, 512‑518, 567‑572, 580‑586, 602‑617, 785‑790, 811‑817 and 827‑836) and 14 peptides as T cell epitopes (amino acids 1‑15, 65‑79, 120‑134, 144‑159, 236‑250, 275‑289, 404‑418, 426‑440, 463‑477, 510‑524, 644‑658, 684‑698, 716‑730 and 816‑830). The software DNAStar predicted the secondary structure of TEF 2, and showed that 27 α‑helices and five β‑sheets were found in the protein. In conclusion, the present study cloned and expressed the Der f TEF 2 gene, and the recombinant protein exhibited immunogenicity, providing a theoretical bases, and references, for the diagnosis and treatment of allergic disease.
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Affiliation(s)
- Desheng Chen
- State Key Laboratory of Respiratory Disease for Allergy at Shenzhen University, Shenzhen Key Laboratory of Allergy and Immunology, Shenzhen University School of Medicine, Shenzhen, Guangdong 518060, P.R. China
| | - Qinghui Fu
- State Key Laboratory of Respiratory Disease for Allergy at Shenzhen University, Shenzhen Key Laboratory of Allergy and Immunology, Shenzhen University School of Medicine, Shenzhen, Guangdong 518060, P.R. China
| | - Jianli Lin
- State Key Laboratory of Respiratory Disease for Allergy at Shenzhen University, Shenzhen Key Laboratory of Allergy and Immunology, Shenzhen University School of Medicine, Shenzhen, Guangdong 518060, P.R. China
| | - Chengshen Hu
- State Key Laboratory of Respiratory Disease for Allergy at Shenzhen University, Shenzhen Key Laboratory of Allergy and Immunology, Shenzhen University School of Medicine, Shenzhen, Guangdong 518060, P.R. China
| | - Nana Huang
- State Key Laboratory of Respiratory Disease for Allergy at Shenzhen University, Shenzhen Key Laboratory of Allergy and Immunology, Shenzhen University School of Medicine, Shenzhen, Guangdong 518060, P.R. China
| | - Ke Xin Chang
- State Key Laboratory of Respiratory Disease for Allergy at Shenzhen University, Shenzhen Key Laboratory of Allergy and Immunology, Shenzhen University School of Medicine, Shenzhen, Guangdong 518060, P.R. China
| | - Baoqing Sun
- Department of Allergy, Affiliated Luohu Hospital of Shenzhen University, Shenzhen Luohu Hospital Group, Shenzhen, Guangdong 518000, P.R. China
| | - Zhigang Liu
- State Key Laboratory of Respiratory Disease for Allergy at Shenzhen University, Shenzhen Key Laboratory of Allergy and Immunology, Shenzhen University School of Medicine, Shenzhen, Guangdong 518060, P.R. China
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7
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Polikovsky M, Fernand F, Sack M, Frey W, Müller G, Golberg A. In silico food allergenic risk evaluation of proteins extracted from macroalgae Ulva sp. with pulsed electric fields. Food Chem 2019; 276:735-744. [DOI: 10.1016/j.foodchem.2018.09.134] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 09/20/2018] [Accepted: 09/22/2018] [Indexed: 01/06/2023]
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8
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Wang RQ, Wang YJ, Xu ZQ, Zhou YJ, Cao MD, Zhu W, Sun JL, Wei JF. Canis familiaris allergen Can f 7: Expression, purification and analysis of B cell epitopes in Chinese children with dog allergies. Int J Mol Med 2019; 43:1531-1541. [PMID: 30664181 DOI: 10.3892/ijmm.2019.4065] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Accepted: 01/02/2019] [Indexed: 11/05/2022] Open
Abstract
Dogs are a major source of indoor allergens. However, the prevalence of dog allergies in China remains unclear, especially in children. In the present study, Can f 7, a canine allergen belonging to the Niemann pick type C2 protein family, was selected to study its sensitization rate in Chinese children with dog allergies. The Can f 7 gene was subcloned into a pET‑28a vector and expressed in Escherichia coli BL21 (DE3) cells. Recombinant Can f 7 was purified by nickel affinity chromatography, identified by SDS‑PAGE electrophoresis, and had its allergenicity assessed by western blot, ELISA and basophil activation tests. Through a series of bioinformatical approaches, B‑cell epitopes, secondary structures, and 3 dimensional (3D) homology modeling of Can f 7 were predicted. The activity of the B cell epitopes was verified by ELISA. The recombinant Can f 7 showed a distinct band with a molecular weight of 14 kDa. Six of 20 sera from dog‑allergic children reacted positively to the Can f 7. Can f 7 induced an ~4.0‑fold increase in cluster of differentiation 63 and C‑C motif chemokine receptor R3 expression in basophils sensitized with the serum of dog‑allergic children compared with those of non‑allergic controls. The secondary structure analysis showed that Can f 7 contains 6 β‑sheets. Five B cell epitopes of Can f 7 were predicted, and two of these were confirmed by ELISA. These results indicate that Can f 7 is an important canine allergen in Chinese children and provide novel data for further research concerning the use of Can f 7 in the diagnosis and treatment of Chinese children with canine allergy symptoms.
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Affiliation(s)
- Rui-Qi Wang
- Department of Allergy, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing Key Laboratory of Precision Medicine for Diagnosis and Treatment on Allergic Diseases, Beijing 100730, P.R. China
| | - Yu-Jie Wang
- Research Division of Clinical Pharmacology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Zhi-Qiang Xu
- Research Division of Clinical Pharmacology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Yan-Jun Zhou
- Research Division of Clinical Pharmacology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Meng-Da Cao
- Research Division of Clinical Pharmacology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Wei Zhu
- Research Division of Clinical Pharmacology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Jin-Lyu Sun
- Department of Allergy, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing Key Laboratory of Precision Medicine for Diagnosis and Treatment on Allergic Diseases, Beijing 100730, P.R. China
| | - Ji-Fu Wei
- Research Division of Clinical Pharmacology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
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9
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Wang DW, Ni WW, Zhou YJ, Huang W, Cao MD, Meng L, Wei JF. Expression, purification and epitope analysis of Pla a 2 allergen from Platanus acerifolia pollen. Mol Med Rep 2017; 17:394-399. [PMID: 29115430 DOI: 10.3892/mmr.2017.7883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Accepted: 09/06/2017] [Indexed: 11/05/2022] Open
Abstract
Platanus acerifolia is one of the major sources of outdoor allergens to humans, and can induce allergic asthma, rhinitis, dermatitis and other allergic diseases. Pla a 2 is a polygalacturonase and represents the major allergen identified in P. acerifolia pollen. The aim of the present study was to express and purify Pla a 2, and to predict B and T cell epitopes of Pla a 2. The gene encoding Pla a 2 was cloned into the pET28a vector and subsequently transfected into ArcticExpress™ (DE3) Escherichia coli cells; purified Pla a 2 was analyzed by western blot analysis. The results of the present study revealed that the Pla a 2 allergen has the ability to bind immunoglobulin E within the sera of patients allergic to P. acerifolia pollen. In addition, the B cell epitopes of Pla a 2 were predicted using the DNAStar Protean system, Bioinformatics Predicted Antigenic Peptides and BepiPred 1.0 software; T cell epitopes were predicted using NetMHCIIpan ‑3.0 and ‑2.2. In total, eight B cell epitopes (15‑24, 60‑66, 78‑86, 109‑124, 232‑240, 260‑269, 298‑306 and 315‑322) and five T cell epitopes (62‑67, 86‑91, 125‑132, 217‑222 and 343‑350) were predicted in the present study. These findings may be used to improve allergen immunotherapies and reduce the frequency of pollen‑associated allergic reactions.
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Affiliation(s)
- De-Wang Wang
- Research Division of Clinical Pharmacology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Wei-Wei Ni
- Research Division of Clinical Pharmacology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Yan-Jun Zhou
- Research Division of Clinical Pharmacology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Wen Huang
- Research Division of Clinical Pharmacology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Meng-Da Cao
- Research Division of Clinical Pharmacology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Ling Meng
- Research Division of Clinical Pharmacology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Ji-Fu Wei
- Research Division of Clinical Pharmacology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
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10
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María RR, Arturo CJ, Alicia JA, Paulina MG, Gerardo AO. The Impact of Bioinformatics on Vaccine Design and Development. Vaccines (Basel) 2017. [DOI: 10.5772/intechopen.69273] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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11
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Govindaraj D, Sharma S, Gaur S, Lavasa S, Prasad N, Arora N. Immunogenic peptides: B & T Cell Epitopes of Per a 10 Allergen of Periplaneta americana. Mol Immunol 2016; 80:24-32. [DOI: 10.1016/j.molimm.2016.10.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 10/11/2016] [Accepted: 10/14/2016] [Indexed: 11/24/2022]
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12
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Yang H, Chen H, Jin M, Xie H, He S, Wei JF. Molecular cloning, expression, IgE binding activities and in silico epitope prediction of Per a 9 allergens of the American cockroach. Int J Mol Med 2016; 38:1795-1805. [PMID: 27840974 PMCID: PMC5117749 DOI: 10.3892/ijmm.2016.2793] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2015] [Accepted: 10/19/2016] [Indexed: 11/06/2022] Open
Abstract
Per a 9 is a major allergen of the American cockroach (CR), which has been recognized as an important cause of imunoglobulin E-mediated type I hypersensitivity worldwide. However, it is not neasy to obtain a substantial quantity of this allergen for use in functional studies. In the present study, the Per a 9 gene was cloned and expressed in Escherichia coli (E. coli) systems. It was found that 13/16 (81.3%) of the sera from patients with allergies caused by the American CR reacted to Per a 9, as assessed by enzyme-linked immunosorbent assay, confirming that Per a 9 is a major allergen of CR. The induction of the expression of CD63 and CCR3 in passively sensitized basophils (from sera of patients with allergies caused by the American CR) by approximately 4.2-fold indicated that recombinant Per a 9 was functionally active. Three immunoinformatics tools, including the DNAStar Protean system, Bioinformatics Predicted Antigenic Peptides (BPAP) system and the BepiPred 1.0 server were used to predict the potential B cell epitopes, while Net-MHCIIpan-2.0 and NetMHCII-2.2 were used to predict the T cell epitopes of Per a 9. As a result, we predicted 11 peptides (23-28, 39-46, 58-64, 91-118, 131-136, 145-154, 159-165, 176-183, 290-299, 309-320 and 338-344) as potential B cell linear epitopes. In T cell prediction, the Per a 9 allergen was predicted to have 5 potential T cell epitope sequences, 119-127, 194-202, 210-218, 239-250 and 279-290. The findings of our study may prove to be useful in the development of peptide-based vaccines to combat CR-induced allergies.
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Affiliation(s)
- Haiwei Yang
- Allergy and Clinical Immunology Research Centre, The First Affiliated Hospital of Liaoning Medical University, Jinzhou, Liaoning 121001, P.R. China
| | - Hao Chen
- Research Division of Clinical Pharmacology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Min Jin
- Research Division of Clinical Pharmacology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Hua Xie
- Department of Respiratory Medicine, General Hospital of Shenyang Military Region, PLA Cancer Center, Shenyang, Liaoning 110840, P.R. China
| | - Shaoheng He
- Allergy and Clinical Immunology Research Centre, The First Affiliated Hospital of Liaoning Medical University, Jinzhou, Liaoning 121001, P.R. China
| | - Ji-Fu Wei
- Research Division of Clinical Pharmacology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
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13
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Tong X, Guo M, Jin M, Chen H, Li Y, Wei JF. In silico epitope prediction, expression and functional analysis of Per a 10 allergen from the American cockroach. Int J Mol Med 2016; 38:1806-1814. [PMID: 27840898 PMCID: PMC5117736 DOI: 10.3892/ijmm.2016.2790] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Accepted: 10/21/2016] [Indexed: 01/02/2023] Open
Abstract
Cockroach (CR) allergies caused by the American cockroach hyave been recognized to be repsonsible for IgE-mediated type I hypersensitivity worldwide. Per a 10 is one of the recognized main allergens of the American CR. In a previous study, we examined another American CR allergen, Per a 9 in patients with CR allergies and examined epitope sequences in this allergen. In the present study, we aimed to examine epitope sequences in the Per a 10 allergen. for this purpose, the Per a 10 gene was cloned and expressed in Escherichia coli (E. coli) systems. Our results revealed that 9 out of 16 (56.3%) sera from patients with American CR allergies reacted to Per a10, as assessed by ELISA, confirming that Per a 10 is a major allergen of the American CR. Our results also revealed that the expression of CD63 and CCR3 on passively sensitized basophils (obtained sera of patients with American CR allergies) was increased by approximately 2.3-fold, indicating that recombinant Per a 10 is functionally active. In addition, 3 immunoinformatics tools, namely the DNAStar Protean system, the Bioinformatics Predicted Antigenic Peptides (BPAP) system and the BepiPred 1.0 server were used to predict the peptides and the results revealed 8 peptides (2-12, 55-67, 98-120, 125-133, 149-160, 170-182, 201-208 and 223-227) as potential B cell epitopes of the Per a 10 allergen. Moreover, Per a 10 was predicted to have 3 T cell epitope sequences, namely 83-92, 139-147 and 162-170. The findings of our study on the CR allergen may prove to be useful in the development of peptide-based vaccine for the prevention and/or treatment of CR allergies.
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Affiliation(s)
- Xunliang Tong
- Department of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing 100730, P.R. China
| | - Miao Guo
- Research Division of Clinical Pharmacology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Min Jin
- Research Division of Clinical Pharmacology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Hao Chen
- Research Division of Clinical Pharmacology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Yanming Li
- Department of Respiratory and Critical Care Medicine, Beijing Hospital, National Clinical Research Center for Respiratory Disease, Beijing 100730, P.R. China
| | - Ji-Fu Wei
- Research Division of Clinical Pharmacology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
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14
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Zhang Y, Zhu L, Li S, Zhang J, She T, Yan J, Bian Y, Li H. Identification of the major allergenic epitopes of Eriocheir sinensis roe hemocyanin: A novel tool for food allergy diagnoses. Mol Immunol 2016; 74:125-32. [DOI: 10.1016/j.molimm.2016.05.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2016] [Revised: 04/25/2016] [Accepted: 05/04/2016] [Indexed: 10/21/2022]
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15
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QUAN LIN, HE HUA. Treatment with olopatadine and naphazoline hydrochloride reduces allergic conjunctivitis in mice through alterations in inflammation, NGF and VEGF. Mol Med Rep 2016; 13:3319-25. [DOI: 10.3892/mmr.2016.4937] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Accepted: 12/08/2015] [Indexed: 11/06/2022] Open
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Dillon MBC, Schulten V, Oseroff C, Paul S, Dullanty LM, Frazier A, Belles X, Piulachs MD, Visness C, Bacharier L, Bloomberg GR, Busse P, Sidney J, Peters B, Sette A. Different Bla-g T cell antigens dominate responses in asthma versus rhinitis subjects. Clin Exp Allergy 2015; 45:1856-67. [PMID: 26414909 PMCID: PMC4654660 DOI: 10.1111/cea.12643] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Revised: 07/29/2015] [Accepted: 08/19/2015] [Indexed: 02/05/2023]
Abstract
BACKGROUND AND OBJECTIVE The allergenicity of several German cockroach (Bla-g) antigens at the level of IgE responses is well established. However, less is known about the specificity of CD4+ TH responses, and whether differences exist in associated magnitude or cytokine profiles as a function of disease severity. METHODS Proteomic and transcriptomic techniques were used to identify novel antigens recognized by allergen-specific T cells. To characterize different TH functionalities of allergen-specific T cells, ELISPOT assays with sets of overlapping peptides covering the sequences of known allergens and novel antigens were employed to measure release of IL-5, IFNγ, IL-10, IL-17 and IL-21. RESULTS Using these techniques, we characterized TH responses in a cohort of adult Bla-g-sensitized subjects, either with (n = 55) or without (n = 17) asthma, and nonsensitized controls (n = 20). T cell responses were detected for ten known Bla-g allergens and an additional ten novel Bla-g antigens, representing in total a 5-fold increase in the number of antigens demonstrated to be targeted by allergen-specific T cells. Responses of sensitized individuals regardless of asthma status were predominantly TH 2, but higher in patients with diagnosed asthma. In asthmatic subjects, Bla-g 5, 9 and 11 were immunodominant, while, in contrast, nonasthmatic-sensitized subjects responded mostly to Bla-g 5 and 4 and the novel antigen NBGA5. CONCLUSIONS Asthmatic and nonasthmatic cockroach-sensitized individuals exhibit similar TH 2-polarized responses. Compared with nonasthmatics, however, asthmatic individuals have responses of higher magnitude and different allergen specificity.
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Affiliation(s)
- M B C Dillon
- La Jolla Institute for Allergy and Immunology, La Jolla, CA, USA
| | - V Schulten
- La Jolla Institute for Allergy and Immunology, La Jolla, CA, USA
| | - C Oseroff
- La Jolla Institute for Allergy and Immunology, La Jolla, CA, USA
| | - S Paul
- La Jolla Institute for Allergy and Immunology, La Jolla, CA, USA
| | - L M Dullanty
- La Jolla Institute for Allergy and Immunology, La Jolla, CA, USA
| | - A Frazier
- La Jolla Institute for Allergy and Immunology, La Jolla, CA, USA
| | - X Belles
- Institut de Biologia Evolutiva (CSIC-Universitat Pompeu Fabra), Barcelona, Spain
| | - M D Piulachs
- Institut de Biologia Evolutiva (CSIC-Universitat Pompeu Fabra), Barcelona, Spain
| | - C Visness
- Federal Systems Division, Rho Inc., Chapel Hill, NC, USA
| | - L Bacharier
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO, USA
| | - G R Bloomberg
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO, USA
| | - P Busse
- Division of Clinical Immunology, Icahn School of Medicine at Mount Sinai School of Medicine, New York, NY, USA
| | - J Sidney
- La Jolla Institute for Allergy and Immunology, La Jolla, CA, USA
| | - B Peters
- La Jolla Institute for Allergy and Immunology, La Jolla, CA, USA
| | - A Sette
- La Jolla Institute for Allergy and Immunology, La Jolla, CA, USA
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