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Giannetti A, Pession A, Bettini I, Ricci G, Giannì G, Caffarelli C. IgE Mediated Shellfish Allergy in Children-A Review. Nutrients 2023; 15:3112. [PMID: 37513530 PMCID: PMC10386692 DOI: 10.3390/nu15143112] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 07/08/2023] [Accepted: 07/10/2023] [Indexed: 07/30/2023] Open
Abstract
Shellfish is a leading cause of food allergy and anaphylaxis worldwide. Recent advances in molecular characterization have led to a better understanding of the allergen profile. High sequence homology between shellfish species and between shellfish and house dust mites leads to a high serological cross-reactivity, which does not accurately correlate with clinical cross-reactions. Clinical manifestations are immediate and the predominance of perioral symptoms is a typical feature of shellfish allergy. Diagnosis, as for other food allergies, is based on SPTs and specific IgE, while the gold standard is DBPCFC. Cross-reactivity between shellfish is common and therefore, it is mandatory to avoid all shellfish. New immunotherapeutic strategies based on hypoallergens and other innovative approaches represent the new frontiers for desensitization.
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Affiliation(s)
- Arianna Giannetti
- Paediatrics Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy; (A.G.); (A.P.)
| | - Andrea Pession
- Paediatrics Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy; (A.G.); (A.P.)
| | - Irene Bettini
- Paediatrics Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy; (A.G.); (A.P.)
| | - Giampaolo Ricci
- Department of Medical and Surgical Sciences (DIMEC), University of Bologna, 40138 Bologna, Italy;
| | - Giuliana Giannì
- Clinica Pediatrica, Azienda Ospedaliero-Universitaria, Medicine and Surgery Department, Università di Parma, 43126 Parma, Italy;
| | - Carlo Caffarelli
- Clinica Pediatrica, Azienda Ospedaliero-Universitaria, Medicine and Surgery Department, Università di Parma, 43126 Parma, Italy;
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2
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Chen Y, Tian G, Wang L, Sang Y, Sun J. Effects of ultrasound-assisted high temperature-pressure treatment on the structure and allergenicity of tropomyosin from clam ( Mactra veneriformis). Food Chem X 2023; 18:100740. [PMID: 37342821 PMCID: PMC10277455 DOI: 10.1016/j.fochx.2023.100740] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 05/16/2023] [Accepted: 06/04/2023] [Indexed: 06/23/2023] Open
Abstract
Tropomyosin (TM) is the major allergen in clams. This study aimed to evaluate the effects of ultrasound-assisted high temperature-pressure treatment on the structure and allergenicity of TM from clams. The results showed that the combined treatment significantly affected the structure of TM-converting the α-helix to β-sheet and random coil, and decreasing the sulfhydryl group content, surface hydrophobicity, and particle size. These structural changes caused the unfolding of the protein, disrupting and modifying the allergenic epitopes. The significant reduction in the allergenicity of TM was approximately 68.1% when treated with combined processing (P < 0.05). Notably, an increase in the content of the relevant amino acids and a smaller particle size accelerated the penetration of the enzyme into the protein matrix, resulting in strengthening the gastrointestinal digestibility of TM. These results prove that ultrasound-assisted high temperature-pressure treatment has great potential in reducing allergenicity, benefiting the development of hypoallergenic clam products.
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Giovannini M, Beken B, Buyuktiryaki B, Barni S, Liccioli G, Sarti L, Lodi L, Pontone M, Bartha I, Mori F, Sackesen C, du Toit G, Lopata AL, Muraro A. IgE-Mediated Shellfish Allergy in Children. Nutrients 2023; 15:2714. [PMID: 37375617 DOI: 10.3390/nu15122714] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Revised: 05/27/2023] [Accepted: 05/30/2023] [Indexed: 06/29/2023] Open
Abstract
Shellfish, including various species of mollusks (e.g., mussels, clams, and oysters) and crustaceans (e.g., shrimp, prawn, lobster, and crab), have been a keystone of healthy dietary recommendations due to their valuable protein content. In parallel with their consumption, allergic reactions related to shellfish may be increasing. Adverse reactions to shellfish are classified into different groups: (1) Immunological reactions, including IgE and non-IgE allergic reactions; (2) non-immunological reactions, including toxic reactions and food intolerance. The IgE-mediated reactions occur within about two hours after ingestion of the shellfish and range from urticaria, angioedema, nausea, and vomiting to respiratory signs and symptoms such as bronchospasm, laryngeal oedema, and anaphylaxis. The most common allergenic proteins involved in IgE-mediated allergic reactions to shellfish include tropomyosin, arginine kinase, myosin light chain, sarcoplasmic calcium-binding protein, troponin c, and triosephosphate isomerase. Over the past decades, the knowledge gained on the identification of the molecular features of different shellfish allergens improved the diagnosis and the potential design of allergen immunotherapy for shellfish allergy. Unfortunately, immunotherapeutic studies and some diagnostic tools are still restricted in a research context and need to be validated before being implemented into clinical practice. However, they seem promising for improving management strategies for shellfish allergy. In this review, epidemiology, pathogenesis, clinical features, diagnosis, and management of shellfish allergies in children are presented. The cross-reactivity among different forms of shellfish and immunotherapeutic approaches, including unmodified allergens, hypoallergens, peptide-based, and DNA-based vaccines, are also addressed.
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Affiliation(s)
- Mattia Giovannini
- Allergy Unit, Meyer Children's Hospital IRCCS, 50139 Florence, Italy
- Department of Health Sciences, University of Florence, 50139 Florence, Italy
| | - Burcin Beken
- Department of Pediatric Allergy & Immunology, School of Medicine, Acibadem University, 34303 Istanbul, Turkey
| | - Betul Buyuktiryaki
- Division of Pediatric Allergy, Department of Pediatrics, School of Medicine, Koc University, 34450 Istanbul, Turkey
| | - Simona Barni
- Allergy Unit, Meyer Children's Hospital IRCCS, 50139 Florence, Italy
| | - Giulia Liccioli
- Allergy Unit, Meyer Children's Hospital IRCCS, 50139 Florence, Italy
| | - Lucrezia Sarti
- Allergy Unit, Meyer Children's Hospital IRCCS, 50139 Florence, Italy
| | - Lorenzo Lodi
- Department of Health Sciences, University of Florence, 50139 Florence, Italy
- Immunology Unit, Meyer Children's Hospital IRCCS, 50139 Florence, Italy
| | - Matteo Pontone
- Allergy Unit, Meyer Children's Hospital IRCCS, 50139 Florence, Italy
- Department of Health Sciences, University of Florence, 50139 Florence, Italy
| | - Irene Bartha
- Pediatric Allergy Group, Department of Women and Children's Health, School of Life Course Sciences, King's College London, London SE1 9RT, UK
- Children's Allergy Service, Evelina London Children's Hospital, Guy's and St Thomas' NHS Foundation Trust, London SE1 7EH, UK
| | - Francesca Mori
- Allergy Unit, Meyer Children's Hospital IRCCS, 50139 Florence, Italy
| | - Cansin Sackesen
- Division of Pediatric Allergy, Department of Pediatrics, School of Medicine, Koc University, 34450 Istanbul, Turkey
| | - George du Toit
- Pediatric Allergy Group, Department of Women and Children's Health, School of Life Course Sciences, King's College London, London SE1 9RT, UK
- Children's Allergy Service, Evelina London Children's Hospital, Guy's and St Thomas' NHS Foundation Trust, London SE1 7EH, UK
- Peter Gorer Department of Immunobiology, School of Immunology & Microbial Sciences, King's College London, London SE5 9NU, UK
| | - Andreas L Lopata
- Molecular Allergy Research Laboratory, College of Public Health, Medical and Veterinary Sciences, Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, QLD 4811, Australia
- Tropical Futures Institute, James Cook University, Singapore 387380, Singapore
| | - Antonella Muraro
- Food Allergy Referral Centre, Department of Mother and Child Health, University of Padua, 35128 Padua, Italy
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4
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Kamath SD, Bublin M, Kitamura K, Matsui T, Ito K, Lopata AL. Cross-reactive epitopes and their role in food allergy. J Allergy Clin Immunol 2023; 151:1178-1190. [PMID: 36932025 DOI: 10.1016/j.jaci.2022.12.827] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 12/14/2022] [Accepted: 12/19/2022] [Indexed: 03/17/2023]
Abstract
Allergenic cross-reactivity among food allergens complicates the diagnosis and management of food allergy. This can result in many patients being sensitized (having allergen-specific IgE) to foods without exhibiting clinical reactivity. Some food groups such as shellfish, fish, tree nuts, and peanuts have very high rates of cross-reactivity. In contrast, relatively low rates are noted for grains and milk, whereas many other food families have variable rates of cross-reactivity or are not well studied. Although classical cross-reactive carbohydrate determinants are clinically not relevant, α-Gal in red meat through tick bites can lead to severe reactions. Multiple sensitizations to tree nuts complicate the diagnosis and management of patients allergic to peanut and tree nut. This review discusses cross-reactive allergens and cross-reactive carbohydrate determinants in the major food groups, and where available, describes their B-cell and T-cell epitopes. The clinical relevance of these cross-reactive B-cell and T-cell epitopes is highlighted and their possible impact on allergen-specific immunotherapy for food allergy is discussed.
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Affiliation(s)
- Sandip D Kamath
- Division of Medical Biotechnology, Institute of Pathophysiology and Allergy Research, Center of Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria; Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, Australia.
| | - Merima Bublin
- Division of Medical Biotechnology, Institute of Pathophysiology and Allergy Research, Center of Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Katsumasa Kitamura
- Department of Allergy, Allergy and Immunology Center, Aichi Children's Health and Medical CenterAichi, Japan
| | - Teruaki Matsui
- Department of Allergy, Allergy and Immunology Center, Aichi Children's Health and Medical CenterAichi, Japan
| | - Komei Ito
- Department of Allergy, Allergy and Immunology Center, Aichi Children's Health and Medical CenterAichi, Japan; Comprehensive Pediatric Medicine, Nagoya University Graduate School of Medicine, Aichi, Japan
| | - Andreas L Lopata
- Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, Australia; Molecular Allergy Research Laboratory, College of Public Health, Medical and Veterinary Sciences, James Cook University, Townsville, Australia; Tropical Futures Institute, James Cook University, Singapore; Centre for Food and Allergy Research, Murdoch Childrens Research Institute, Melbourne, Australia.
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Zhang Z, Li XM, Wang H, Lin H, Xiao H, Li Z. Seafood allergy: Allergen, epitope mapping and immunotherapy strategy. Crit Rev Food Sci Nutr 2023; 63:1314-1338. [PMID: 36825451 DOI: 10.1080/10408398.2023.2181755] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Seafoods are fashionable delicacies with high nutritional values and culinary properties, while seafood belongs to worldwide common food allergens. In recent years, many seafood allergens have been identified, while the diversity of various seafood species give a great challenge in identifying and characterizing seafood allergens, mapping IgE-binding epitopes and allergen immunotherapy development, which are critical for allergy diagnostics and immunotherapy treatments. This paper reviewed the recent progress on seafood (fish, crustacean, and mollusk) allergens, IgE-binding epitopes and allergen immunotherapy for seafood allergy. In recent years, many newly identified seafood allergens were reported, this work concluded the current situation of seafood allergen identification and designation by the World Health Organization (WHO)/International Union of Immunological Societies (IUIS) Allergen Nomenclature Sub-Committee. Moreover, this review represented the recent advances in identifying the IgE-binding epitopes of seafood allergens, which were helpful to the diagnosis, prevention and treatment for seafood allergy. Furthermore, the allergen immunotherapy could alleviate seafood allergy and provide promising approaches for seafood allergy treatment. This review represents the recent advances and future outlook on seafood allergen identification, IgE-binding epitope mapping and allergen immunotherapy strategies for seafood allergy prevention and treatment.
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Affiliation(s)
- Ziye Zhang
- Laboratory of Food Safety, College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Xiu-Min Li
- Department of Pathology, Microbiology and Immunology and Department of Otolaryngology, School of Medicine, New York Medical College, Valhalla, New York, USA
| | - Hao Wang
- Laboratory of Food Safety, College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Hong Lin
- Laboratory of Food Safety, College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Hang Xiao
- Department of Food Science, University of Massachusetts, Amherst, Massachusetts, USA
| | - Zhenxing Li
- Laboratory of Food Safety, College of Food Science and Engineering, Ocean University of China, Qingdao, China
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Zhao X, Li G, Feng X, Cheng Q, Lu Z, Gu R, Lu J, Liu W. Physicochemical characterization and linear epitopes identification of arginine kinase allergen from Crassostrea gigas. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2022; 102:3435-3445. [PMID: 34837649 DOI: 10.1002/jsfa.11691] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 10/10/2021] [Accepted: 11/27/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Molluscan shellfish, including oysters, often cause allergic reactions in sensitive people throughout the world. It has been demonstrated that arginine kinase (AK) is one of the major allergens of oyster. The present study aimed to evaluate the immunoreactivity and structure of oyster AK as affected by heat treatment, pH change, and in vitro digestion. What is more, the immunoglobulin E-binding epitopes of this allergen were also predicted and validated. RESULTS Thermal and pH assays revealed that AK was unstable at temperature >40 °C or pH ≤5.0 by sodium dodecyl sulfate polyacrylamide gel electrophoresis and circular dichroism, and the digestibility assays suggested that AK was more easily digested by pepsin than by trypsin and chymotrypsin. The potential epitopes were predicted through immunoinformatics tools, and seven linear epitopes were identified by indirect competition enzyme-linked immunosorbent assay with pooled sera and individual serum from oyster-allergic patients. The critical amino acids in each epitope were also confirmed using mutant peptides. These linear epitopes and critical amino acids were apt to distribute on the outer surface of homology-based AK model. Moreover, the three denaturants (sodium dodecyl sulfate, β-mercaptoethanol, and urea) can destroy the spatial structure of AK and increase or reduce its allergenicity by denaturation treatments. CONCLUSION Processing conditions lay the foundation for the variation of allergenicity. Seven linear epitopes and their critical amino acids were identified by indirect competitive enzyme-linked immunosorbent assay. These findings will be helpful in allergy diagnosis and development of hypoallergenic products in the near future. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Xiaohan Zhao
- Beijing Engineering Research Center of Protein & Functional Peptides, China National Research Institute of Food and Fermentation Industries, Beijing, PR China
| | - Guoming Li
- Beijing Engineering Research Center of Protein & Functional Peptides, China National Research Institute of Food and Fermentation Industries, Beijing, PR China
| | - Xiaowen Feng
- Beijing Engineering Research Center of Protein & Functional Peptides, China National Research Institute of Food and Fermentation Industries, Beijing, PR China
| | - Qingli Cheng
- Beijing Engineering Research Center of Protein & Functional Peptides, China National Research Institute of Food and Fermentation Industries, Beijing, PR China
| | - Zhihao Lu
- Beijing Engineering Research Center of Protein & Functional Peptides, China National Research Institute of Food and Fermentation Industries, Beijing, PR China
| | - Ruizeng Gu
- Beijing Engineering Research Center of Protein & Functional Peptides, China National Research Institute of Food and Fermentation Industries, Beijing, PR China
| | - Jun Lu
- Beijing Engineering Research Center of Protein & Functional Peptides, China National Research Institute of Food and Fermentation Industries, Beijing, PR China
| | - Wenying Liu
- Beijing Engineering Research Center of Protein & Functional Peptides, China National Research Institute of Food and Fermentation Industries, Beijing, PR China
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7
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Emerging approaches in the diagnosis and therapy in shellfish allergy. Curr Opin Allergy Clin Immunol 2022; 22:202-212. [DOI: 10.1097/aci.0000000000000827] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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8
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Zhang P, Gao J, Che H, Xue W, Yang D. Molecular Basis of IgE-Mediated Shrimp Allergy and Heat Desensitization. Nutrients 2021; 13:3397. [PMID: 34684397 PMCID: PMC8540294 DOI: 10.3390/nu13103397] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 09/20/2021] [Accepted: 09/22/2021] [Indexed: 11/16/2022] Open
Abstract
Crustacean allergy, especially to shrimp, is the most predominant cause of seafood allergy. However, due to the high flexibility of immunoglobulin E (IgE), its three-dimensional structure remains unsolved, and the molecular mechanism of shrimp allergen recognition is unknown. Here a chimeric IgE was built in silico, and its variable region in the light chain was replaced with sequences derived from shrimp tropomyosin (TM)-allergic patients. A variety of allergenic peptides from the Chinese shrimp TM were built, treated with heating, and subjected to IgE binding in silico. Amino acid analysis shows that the amino acid residue conservation in shrimp TM contributes to eliciting an IgE-mediated immune response. In the shrimp-allergic IgE, Glu98 in the light chain and other critical residues that recognize allergens from shrimp are implicated in the molecular basis of IgE-mediated shrimp allergy. Heat treatment could alter the conformations of TM allergenic peptides, impact their intramolecular hydrogen bonding, and subsequently decrease the binding between these peptides and IgE. We found Glu98 as the characteristic amino acid residue in the light chain of IgE to recognize general shrimp-allergic sequences, and heat-induced conformational change generally desensitizes shrimp allergens.
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Affiliation(s)
- PeiAo Zhang
- College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, China; (P.Z.); (J.G.); (H.C.); (W.X.)
- Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Jihui Gao
- College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, China; (P.Z.); (J.G.); (H.C.); (W.X.)
- Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Huilian Che
- College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, China; (P.Z.); (J.G.); (H.C.); (W.X.)
| | - Wentong Xue
- College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, China; (P.Z.); (J.G.); (H.C.); (W.X.)
| | - Dong Yang
- College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, China; (P.Z.); (J.G.); (H.C.); (W.X.)
- Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, China
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Zhao L, Zhang Y, Zhang S, Zhang L, Lan F. The effect of immunotherapy on cross-reactivity between house dust mite and other allergens in house dust mite -sensitized patients with allergic rhinitis. Expert Rev Clin Immunol 2021; 17:969-975. [PMID: 34388949 DOI: 10.1080/1744666x.2021.1968834] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
INTRODUCTION House dust mite (HDM) is a main perennial allergen causing allergic rhinitis (AR). It has been shown that HDM cross-reacts with a variety of other allergens. Presently, allergen-specific immunotherapy (AIT) is an effective way for management of mono-sensitized HDM+ AR patients. However, management approaches to polysensitized HDM-sensitized AR patients are not standardized yet. AREA COVERED This article reviews the data available in the literature for cross-reactivity between HDM and inhalant or food allergens, the diagnosis of cross-reactivity in HDM-sensitized AR patients, and the effect of immunotherapy on cross-reactivity in HDM-sensitized AR patients; which may help to develop effective therapeutic strategies for management of polysensitized HDM-sensitized AR patients in the future. EXPERT OPINION Pan-allergen proteins such as tropomyosin, arginine kinase (AK), glutathione S-transferase (GST), and hemocyanin are responsible for cross-reactivity between HDM and other allergens. To distinguish genuine or cross-reactive sensitization, molecular- or component-resolved diagnosis is suggested to apply in HDM-sensitized AR patients. The effect of HDM immunotherapy to treat the associated cross-reactivity in HDM-sensitized AR patients is still contradictory, and might be dependent on the degree of homology between two allergens. Furthermore, targeting tropomyosin might be a promising way to treat HDM patients with allergen cross-reactivity. ABBREVIATIONS AIT: allergen-specific immunotherapy; AK: arginine kinase; AR: allergic rhinitis; CRD: component-resolved diagnostics; Der f: Dermatophagoides farina; Der p: Dermatophagoides pteronyssinus; EAACI: European Academy of Allergy and Clinical Immunology; GST: glutathione S-transferase; GWAS: genome-wide association study; HDM: house dust mite; IgE: immunoglobulin E; RAST: radioallergosorbent test; sIgE: specific IgE; SIT: specific immunotherapy; SCIT: subcutaneous immunotherapy; SLIT: sublingual immunotherapy; SPT: skin prick test.
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Affiliation(s)
- Limin Zhao
- Department of Otolaryngology Head and Neck Surgery, Beijing TongRen Hospital, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Nasal Disease, Beijing Institute of Otolaryngology, Beijing, China
| | - Yuling Zhang
- Department of Otolaryngology Head and Neck Surgery, Beijing TongRen Hospital, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Nasal Disease, Beijing Institute of Otolaryngology, Beijing, China
| | - Shujian Zhang
- Department of Otolaryngology Head and Neck Surgery, Beijing TongRen Hospital, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Nasal Disease, Beijing Institute of Otolaryngology, Beijing, China
| | - Luo Zhang
- Department of Otolaryngology Head and Neck Surgery, Beijing TongRen Hospital, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Nasal Disease, Beijing Institute of Otolaryngology, Beijing, China
| | - Feng Lan
- Department of Otolaryngology Head and Neck Surgery, Beijing TongRen Hospital, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Nasal Disease, Beijing Institute of Otolaryngology, Beijing, China
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10
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Chen YY, Li MS, Yun X, Xia F, Hu MJ, Jin T, Cao MJ, Lai D, Chen G, Liu GM. Site-Directed Mutations of Calcium-Binding Sites Contribute to Reducing the Immunoreactivity of the EF-Hand Sarcoplasmic Calcium-Binding Protein in Scylla paramamosain. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:428-436. [PMID: 33377774 DOI: 10.1021/acs.jafc.0c05733] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In order to reduce the immunoreactivity of sarcoplasmic calcium-binding protein (SCP), site-directed mutations were used to replace key amino acids in the conformational epitopes and calcium-binding sites. The mutant SCPs (mSCPs) were expressed in Escherichia coli, and their immunoreactivities were analyzed using iELISA and basophil activation assays. Furthermore, the structural changes of mSCPs were determined from the circular dichroism spectra. The iELISA results showed that mSCPs could effectively inhibit the binding of wild-type SCP (wtSCP) to sensitive serum, with inhibition rates that reached 90%. Moreover, mSCPs could downregulate the expression levels of CD63 and CD203c on the basophil surface. Compared with wtSCP, the peak values were significantly changed, and the calcium binding ability was impaired, which explained the decline in immunoreactivities of the mSCPs. All of the data confirmed that this approach was effective in reducing the immunoreactivity of SCP and could be applied to other shellfish allergens.
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Affiliation(s)
- Yi-Yu Chen
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Jimei University, Xiamen, Fujian 361021, China
| | - Meng-Si Li
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Jimei University, Xiamen, Fujian 361021, China
| | - Xiao Yun
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Jimei University, Xiamen, Fujian 361021, China
| | - Fei Xia
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Jimei University, Xiamen, Fujian 361021, China
| | - Meng-Jun Hu
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Jimei University, Xiamen, Fujian 361021, China
| | - Tengchuan Jin
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Key Laboratory of Innate Immunity and Chronic Disease, Division of Life Sciences and Medicine, University of Science & Technology of China, Hefei, Anhui 230026, China
| | - Min-Jie Cao
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Jimei University, Xiamen, Fujian 361021, China
| | - Dong Lai
- The Second Affiliated Hospital of Xiamen Medical College, Xiamen, Fujian 361021, China
| | - Guixia Chen
- Women and Children's Hospital Affiliated to Xiamen University, Xiamen, Fujian 361003, China
| | - Guang-Ming Liu
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Jimei University, Xiamen, Fujian 361021, China
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11
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Jacquet A. Perspectives in Allergen-Specific Immunotherapy: Molecular Evolution of Peptide- and Protein-Based Strategies. Curr Protein Pept Sci 2020; 21:203-223. [PMID: 31416410 DOI: 10.2174/1389203720666190718152534] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 05/30/2019] [Accepted: 06/20/2019] [Indexed: 12/13/2022]
Abstract
Allergen-specific Immunotherapy (AIT), through repetitive subcutaneous or sublingual administrations of allergen extracts, represents up to now the unique treatment against allergic sensitizations. However, the clinical efficacy of AIT can be largely dependent on the quality of natural allergen extracts. Moreover, the long duration and adverse side effects associated with AIT negatively impact patient adherence. Tremendous progress in the field of molecular allergology has made possible the design of safer, shorter and more effective new immunotherapeutic approaches based on purified and characterized natural or recombinant allergen derivatives and peptides. This review will summarize the characteristics of these different innovative vaccines including their effects in preclinical studies and clinical trials.
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Affiliation(s)
- Alain Jacquet
- Center of Excellence in Vaccine Research and Development, Faculty of Medicine, Chulalongkorn University, Bangkok, 10330, Thailand
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12
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Zhang J, Liu W, Zhang R, Zhao X, Fang L, Qin X, Gu R, Lu J, Li G. Hypoallergenic mutants of the major oyster allergen Cra g 1 alleviate oyster tropomyosin allergenic potency. Int J Biol Macromol 2020; 164:1973-1983. [PMID: 32758611 DOI: 10.1016/j.ijbiomac.2020.07.325] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 07/30/2020] [Accepted: 07/31/2020] [Indexed: 11/19/2022]
Abstract
Design of hypoallergen with low IgE reactivity is desirable for allergen-specific immunotherapy. Despite oyster tropomyosin (Cra g 1) is considered as the major allergen, no immunotherapy is available now. In the current research, we generated hypoallergens of Cra g 1 and evaluated their allergenicity. Four hypoallergenic derivatives were constructed by epitope deletion or site-directed mutagenesis on grounds of the identified epitopes. They showed obvious reduction in reactivity towards IgE from oyster-allergic patients and Cra g 1-sensitized BN rats, as well as significant decrease in degranulation and secretion of allergic mediators including histamine, IL-4, IL-6 and TNF-α. In addition, to further investigate the molecular mechanism, we examined the effects of these variants on FcεRI-dependent signalling pathway in IgE-challenged RBL-2H3 cells. We found that the hypoallergenic mutants were able to attenuate FcεRI-mediated signaling cascades in tested cells. These results indicate that the hypoallergenic molecules have ideal characteristics and offer a promising new strategy in clinical immunotherapy for shellfish-allergic subjects.
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Affiliation(s)
- Jiangtao Zhang
- Beijing Engineering Research Center of Protein & Functional Peptides, China National Research Institute of Food and Fermentation Industries, Beijing 100015, PR China
| | - Wenying Liu
- Beijing Engineering Research Center of Protein & Functional Peptides, China National Research Institute of Food and Fermentation Industries, Beijing 100015, PR China
| | - Ruixue Zhang
- Beijing Engineering Research Center of Protein & Functional Peptides, China National Research Institute of Food and Fermentation Industries, Beijing 100015, PR China
| | - Xiaohan Zhao
- Beijing Engineering Research Center of Protein & Functional Peptides, China National Research Institute of Food and Fermentation Industries, Beijing 100015, PR China
| | - Lei Fang
- Beijing Engineering Research Center of Protein & Functional Peptides, China National Research Institute of Food and Fermentation Industries, Beijing 100015, PR China
| | - Xiuyuan Qin
- Beijing Engineering Research Center of Protein & Functional Peptides, China National Research Institute of Food and Fermentation Industries, Beijing 100015, PR China
| | - Ruizeng Gu
- Beijing Engineering Research Center of Protein & Functional Peptides, China National Research Institute of Food and Fermentation Industries, Beijing 100015, PR China
| | - Jun Lu
- Beijing Engineering Research Center of Protein & Functional Peptides, China National Research Institute of Food and Fermentation Industries, Beijing 100015, PR China.
| | - Guoming Li
- Beijing Engineering Research Center of Protein & Functional Peptides, China National Research Institute of Food and Fermentation Industries, Beijing 100015, PR China.
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13
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Kamath SD, Scheiblhofer S, Johnson CM, Machado Y, McLean T, Taki AC, Ramsland PA, Iyer S, Joubert I, Hofer H, Wallner M, Thalhamer J, Rolland J, O’Hehir R, Briza P, Ferreira F, Weiss R, Lopata AL. Effect of structural stability on endolysosomal degradation and T-cell reactivity of major shrimp allergen tropomyosin. Allergy 2020; 75:2909-2919. [PMID: 32436591 PMCID: PMC7687109 DOI: 10.1111/all.14410] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 04/21/2020] [Accepted: 04/30/2020] [Indexed: 12/17/2022]
Abstract
BACKGROUND Tropomyosins are highly conserved proteins, an attribute that forms the molecular basis for their IgE antibody cross-reactivity. Despite sequence similarities, their allergenicity varies greatly between ingested and inhaled invertebrate sources. In this study, we investigated the relationship between the structural stability of different tropomyosins, their endolysosomal degradation patterns, and T-cell reactivity. METHODS We investigated the differences between four tropomyosins-the major shrimp allergen Pen m 1 and the minor allergens Der p 10 (dust mite), Bla g 7 (cockroach), and Ani s 3 (fish parasite)-in terms of IgE binding, structural stability, endolysosomal degradation and subsequent peptide generation, and T-cell cross-reactivity in a BALB/c murine model. RESULTS Tropomyosins displayed different melting temperatures, which did not correlate with amino acid sequence similarities. Endolysosomal degradation experiments demonstrated differential proteolytic digestion, as a function of thermal stability, generating different peptide repertoires. Pen m 1 (Tm 42°C) and Der p 10 (Tm 44°C) elicited similar patterns of endolysosomal degradation, but not Bla g 7 (Tm 63°C) or Ani s 3 (Tm 33°C). Pen m 1-specific T-cell clones, with specificity for regions highly conserved in all four tropomyosins, proliferated weakly to Der p 10, but did not proliferate to Bla g 7 and Ani s 3, indicating lack of T-cell epitope cross-reactivity. CONCLUSIONS Tropomyosin T-cell cross-reactivity, unlike IgE cross-reactivity, is dependent on structural stability rather than amino acid sequence similarity. These findings contribute to our understanding of cross-sensitization among different invertebrates and design of suitable T-cell peptide-based immunotherapies for shrimp and related allergies.
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Affiliation(s)
- Sandip D. Kamath
- Australian Institute of Tropical Health and MedicineJames Cook UniversityTownsvilleQldAustralia
| | | | | | - Yoan Machado
- Department of BiosciencesUniversity of SalzburgSalzburgAustria
- Centre of Blood ResearchUniversity of British ColumbiaVancouverBCCanada
| | - Thomas McLean
- School of ScienceRMIT UniversityMelbourneVic.Australia
| | - Aya C. Taki
- Faculty of Veterinary and Agricultural SciencesUniversity of MelbourneMelbourneVic.Australia
| | | | - Swati Iyer
- Department of PhysiologyUniversity of MelbourneMelbourneVic.Australia
| | | | - Heidi Hofer
- Department of BiosciencesUniversity of SalzburgSalzburgAustria
| | - Michael Wallner
- Department of BiosciencesUniversity of SalzburgSalzburgAustria
| | - Josef Thalhamer
- Department of BiosciencesUniversity of SalzburgSalzburgAustria
| | - Jennifer Rolland
- Department of Immunology and PathologyCentral Clinical SchoolMonash UniversityMelbourneVic.Australia
- Department of Allergy, Immunology and Respiratory MedicineCentral Clinical SchoolMonash UniversityMelbourneVic.Australia
- Alfred HospitalMelbourneVic.Australia
| | - Robyn O’Hehir
- Department of Immunology and PathologyCentral Clinical SchoolMonash UniversityMelbourneVic.Australia
- Department of Allergy, Immunology and Respiratory MedicineCentral Clinical SchoolMonash UniversityMelbourneVic.Australia
- Alfred HospitalMelbourneVic.Australia
| | - Peter Briza
- Department of BiosciencesUniversity of SalzburgSalzburgAustria
| | - Fatima Ferreira
- Department of BiosciencesUniversity of SalzburgSalzburgAustria
| | - Richard Weiss
- Department of BiosciencesUniversity of SalzburgSalzburgAustria
| | - Andreas L. Lopata
- Australian Institute of Tropical Health and MedicineJames Cook UniversityTownsvilleQldAustralia
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14
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Wai CY, Leung NY, Chu KH, Leung PS, Leung AS, Wong GW, Leung TF. Overcoming Shellfish Allergy: How Far Have We Come? Int J Mol Sci 2020; 21:ijms21062234. [PMID: 32210187 PMCID: PMC7139905 DOI: 10.3390/ijms21062234] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 03/03/2020] [Accepted: 03/19/2020] [Indexed: 12/25/2022] Open
Abstract
Shellfish allergy caused by undesirable immunological responses upon ingestion of crustaceans and mollusks is a common cause of food allergy, especially in the Asia-Pacific region. While the prevalence of shellfish allergy is increasing, the mainstay of clinical diagnosis for these patients includes extract-based skin prick test and specific IgE measurement while clinical management consists of food avoidance and as-needed use of adrenaline autoinjector should they develop severe allergic reactions. Such a standard of care is unsatisfactory to both patients and healthcare practitioners. There is a pressing need to introduce more specific diagnostic methods, as well as effective and safe therapies for patients with shellfish allergy. Knowledge gained on the identifications and defining the immuno-molecular features of different shellfish allergens over the past two decades have gradually translated into the design of new diagnostic and treatment options for shellfish allergy. In this review, we will discuss the epidemiology, the molecular identification of shellfish allergens, recent progress in various diagnostic methods, as well as current development in immunotherapeutic approaches including the use of unmodified allergens, hypoallergens, immunoregulatory peptides and DNA vaccines for the prevention and treatment of shellfish allergy. The prospect of a “cure “for shellfish allergy is within reach.
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Affiliation(s)
- Christine Y.Y. Wai
- Department of Paediatrics, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong
- Hong Kong Hub of Paediatric Excellence, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Nicki Y.H. Leung
- Department of Paediatrics, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong
| | - Ka Hou Chu
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong;
| | - Patrick S.C. Leung
- Division of Rheumatology/Allergy, School of Medicine, University of California, Davis, CA 95616, USA;
| | - Agnes S.Y. Leung
- Department of Paediatrics, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong
| | - Gary W.K. Wong
- Department of Paediatrics, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong
| | - Ting Fan Leung
- Department of Paediatrics, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong
- Hong Kong Hub of Paediatric Excellence, The Chinese University of Hong Kong, Shatin, Hong Kong
- Correspondence: ; Tel.: +852-3505-2981; Fax: +852-2636-0020
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15
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Xia F, Li MS, Liu QM, Liu M, Yang Y, Cao MJ, Chen GX, Jin T, Liu GM. Crystal Structure Analysis and Conformational Epitope Mutation of Triosephosphate Isomerase, a Mud Crab Allergen. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:12918-12926. [PMID: 31668066 DOI: 10.1021/acs.jafc.9b05279] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The triosephosphate isomerase (TIM), Scy p 8, is a crab allergen and shows cross-reactivity in the shellfish. Here, recombinant Scy p 8 was expressed, and its crystal structure was determined at a resolution of 1.8 Å. The three-dimensional structure of Scy p 8 is primarily composed of a (β/α)8-barrel motif prototype. Additionally, Scy p 8 showed cross-reactivity with high sequential and secondary structural identity among TIMs from shellfish species. The site-directed mutagenesis of critical amino acids of conformational epitopes was carried out, and the mutants of Trp 168 and Lys 237 to Ala reduced immunoglobulin E (IgE)-binding activity by approximately 30%, compared with wild-type TIM in an inhibition ELISA; however, it still induced basophil activation despite the interpatient variability between patients. These results can help to provide an accurate template for the analysis of the IgE binding and establish meaningful relationships between structure and allergenicity.
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Affiliation(s)
- Fei Xia
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources , Jimei University , Xiamen , Fujian 361021 , China
| | - Meng-Si Li
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources , Jimei University , Xiamen , Fujian 361021 , China
| | - Qing-Mei Liu
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources , Jimei University , Xiamen , Fujian 361021 , China
| | - Meng Liu
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources , Jimei University , Xiamen , Fujian 361021 , China
| | - Yang Yang
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources , Jimei University , Xiamen , Fujian 361021 , China
| | - Min-Jie Cao
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources , Jimei University , Xiamen , Fujian 361021 , China
| | - Gui-Xia Chen
- Women and Children's Hospital Affiliated to Xiamen University , Xiamen , Fujian 361003 , China
| | - Tengchuan Jin
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Key Laboratory of Innate Immunity and Chronic Disease, Division of Life Sciences and Medicine , University of Science & Technology of China , Hefei , Anhui 230027 , China
| | - Guang-Ming Liu
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources , Jimei University , Xiamen , Fujian 361021 , China
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16
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Nugraha R, Kamath SD, Johnston E, Karnaneedi S, Ruethers T, Lopata AL. Conservation Analysis of B-Cell Allergen Epitopes to Predict Clinical Cross-Reactivity Between Shellfish and Inhalant Invertebrate Allergens. Front Immunol 2019; 10:2676. [PMID: 31803189 PMCID: PMC6877653 DOI: 10.3389/fimmu.2019.02676] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 10/30/2019] [Indexed: 02/05/2023] Open
Abstract
Understanding and predicting an individual's clinical cross-reactivity to related allergens is a key to better management, treatment and progression of novel therapeutics for food allergy. In food allergy, clinical cross-reactivity is observed in patients reacting to unexpected allergen sources containing the same allergenic protein or antibody binding patches (epitopes), often resulting in severe allergic reactions. Shellfish allergy affects up to 2% of the world population and persists for life in most patients. The diagnosis of shellfish allergy is however often challenging due to reported clinical cross-reactivity to other invertebrates including mites and cockroaches. Prediction of cross-reactivity can be achieved utilizing an in-depth analysis of a few selected IgE-antibody binding epitopes. We combined available experimentally proven IgE-binding epitopes with informatics-based cross-reactivity prediction modeling to assist in the identification of clinical cross-reactive biomarkers on shellfish allergens. This knowledge can be translated into prevention and treatment of allergic diseases. To overcome the problem of predicting IgE cross-reactivity of shellfish allergens we developed an epitope conservation model using IgE binding epitopes available in the Immune Epitope Database and Analysis Resource (http://www.iedb.org/). We applied this method to a set of four different shrimp allergens, and successfully identified several non-cross-reactive as well as cross-reactive epitopes, which have been experimentally established to cross-react. Based on these findings we suggest that this method can be used for advanced component-resolved-diagnosis to identify patients sensitized to a specific shellfish group and distinguish from patients with extensive cross-reactivity to ingested and inhaled allergens from invertebrate sources.
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Affiliation(s)
- Roni Nugraha
- Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, QLD, Australia.,Department of Molecular and Cell Biology, College of Public Health, Medical and Veterinary Science, James Cook University, Townsville, QLD, Australia.,Department of Aquatic Product Technology, Bogor Agricultural University, Bogor, Indonesia
| | - Sandip D Kamath
- Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, QLD, Australia.,Department of Molecular and Cell Biology, College of Public Health, Medical and Veterinary Science, James Cook University, Townsville, QLD, Australia.,Centre for Food and Allergy Research, Murdoch Children's Research Institute, Melbourne, VIC, Australia
| | - Elecia Johnston
- Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, QLD, Australia.,Department of Molecular and Cell Biology, College of Public Health, Medical and Veterinary Science, James Cook University, Townsville, QLD, Australia
| | - Shaymaviswanathan Karnaneedi
- Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, QLD, Australia.,Department of Molecular and Cell Biology, College of Public Health, Medical and Veterinary Science, James Cook University, Townsville, QLD, Australia.,Centre for Food and Allergy Research, Murdoch Children's Research Institute, Melbourne, VIC, Australia
| | - Thimo Ruethers
- Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, QLD, Australia.,Department of Molecular and Cell Biology, College of Public Health, Medical and Veterinary Science, James Cook University, Townsville, QLD, Australia.,Centre for Food and Allergy Research, Murdoch Children's Research Institute, Melbourne, VIC, Australia
| | - Andreas L Lopata
- Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, QLD, Australia.,Department of Molecular and Cell Biology, College of Public Health, Medical and Veterinary Science, James Cook University, Townsville, QLD, Australia.,Centre for Food and Allergy Research, Murdoch Children's Research Institute, Melbourne, VIC, Australia
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17
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Mei XJ, Li MS, Yang Y, Liu M, Mao HY, Zhang ML, Cao MJ, Liu GM. Reducing Allergenicity to Arginine Kinase from Mud Crab Using Site-Directed Mutagenesis and Peptide Aptamers. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:4958-4966. [PMID: 30966750 DOI: 10.1021/acs.jafc.9b00608] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The mud crab ( Scylla paramamosain) is widely consumed but can cause a severe food allergic reaction. To reduce allergenicity to arginine kinase (AK), site-directed mutagenesis was used to destroy disulfide bonds or mutate critical amino acids of conformational epitopes. Three hypoallergenic mutant AKs (mAK1, mAK2, and mAK3) were generated, with the immunoreactivity decreasing by 54.2, 40.1, and 71.4%, respectively. In comparison to recombinant AK (rAK), the structure of mAKs was clearly changed. Additionally, antisense peptides were designed on the basis of linear epitopes and pepsin-cutting sites of AK. Five peptide aptamers were screened by molecular docking and then analyzed by the immunoglobulin E inhibition enzyme-linked immunosorbent assay and human Laboratory of Allergic Diseases 2 mast cell degranulation assay. The peptide aptamers could significantly inhibit allergenicity of rAK and mAKs, and the inhibitory effect of peptide aptamer 3 was slightly better than the others. These results provide synergistic methods to reduce allergenicity to AK, which could be applied to other shellfish allergens.
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Affiliation(s)
- Xue-Jiao Mei
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources , Jimei University , Xiamen , Fujian 361021 , People's Republic of China
| | - Meng-Si Li
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources , Jimei University , Xiamen , Fujian 361021 , People's Republic of China
| | - Yang Yang
- College of Environment and Public Health , Xiamen Huaxia University , Xiamen , Fujian 361024 , People's Republic of China
| | - Meng Liu
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources , Jimei University , Xiamen , Fujian 361021 , People's Republic of China
| | - Hai-Yan Mao
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources , Jimei University , Xiamen , Fujian 361021 , People's Republic of China
| | - Ming-Li Zhang
- Xiamen Medical College Affiliated Second Hospital , Xiamen , Fujian 361021 , People's Republic of China
| | - Min-Jie Cao
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources , Jimei University , Xiamen , Fujian 361021 , People's Republic of China
| | - Guang-Ming Liu
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources , Jimei University , Xiamen , Fujian 361021 , People's Republic of China
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18
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Faisal M, Vasiljevic T, Donkor ON. A review on methodologies for extraction, identification and quantification of allergenic proteins in prawns. Food Res Int 2019; 121:307-318. [PMID: 31108753 DOI: 10.1016/j.foodres.2019.03.040] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 03/13/2019] [Accepted: 03/17/2019] [Indexed: 12/26/2022]
Abstract
Prawn allergy is one of the most common food-borne allergies and current prevention is by avoidance. This review paper summarised different methodologies for the extraction, identification and quantification of prawn protein allergens, reported in various research studies. Following extraction, allergenic components have been analysed using well-established methodologies, such as SDS-PAGE, Immunoblotting, ELISA, CD Spectroscopy, HPLC, DBPCFC, SPT etc. Moreover, the preference towards Aptamer-based technique for allergenicity analysis has also been highlighted in this review paper. The summary of these methodologies will provide a reference platform for present and future research directions.
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Affiliation(s)
- M Faisal
- Advanced Food Systems Research Unit, Institute of Sustainable Industries & Liveable Cities and College of Health and Biomedicine, Victoria University, Werribee Campus, PO Box 14428, Melbourne, Victoria 8001, Australia.
| | - T Vasiljevic
- Advanced Food Systems Research Unit, Institute of Sustainable Industries & Liveable Cities and College of Health and Biomedicine, Victoria University, Werribee Campus, PO Box 14428, Melbourne, Victoria 8001, Australia.
| | - O N Donkor
- Advanced Food Systems Research Unit, Institute of Sustainable Industries & Liveable Cities and College of Health and Biomedicine, Victoria University, Werribee Campus, PO Box 14428, Melbourne, Victoria 8001, Australia.
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19
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Application of adaptive-network-based fuzzy inference systems to the parameter optimization of a biochemical rule-based model. Comput Biol Med 2019; 107:153-160. [PMID: 30818113 DOI: 10.1016/j.compbiomed.2019.01.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 01/22/2019] [Accepted: 01/22/2019] [Indexed: 11/21/2022]
Abstract
In this study, the binding of allergens to antibody-receptor complexes was investigated. This process is important in understanding the allergic response. A BioNetGen model that simulates this process, combined with a novel method for encoding steric effects via the optimization of the cutoff distance and the rule binding rate, was previously developed. These parameters were optimized by fitting the model output to the output of a 3D simulation that explicitly represents molecular geometry. In this work, the parameters for the BioNetGen model were optimized using an adaptive-network-based fuzzy inference system in order to predict the rule rate and cutoff distance given a residual-sum-of-squares value or a probability distribution. The fuzzy systems were constructed using fuzzy c-means clustering with existing data from BioNetGen model parameter scans used as the training data. Fuzzy systems with various input data and number of clusters were created and tested. Their performance was analyzed with regard to the effective optimization of the rule-based model. The study found that the fuzzy system that uses a residual-sum-of-squares value as the input value performs acceptably well. However, the performance of the fuzzy systems that use probabilities as their input values performed inconsistently in the tests and need further development. This methodology could potentially be modified for use in fitting other biological models.
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20
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Identification and mutational analysis of continuous, immunodominant epitopes of the major oyster allergen Crag 1. Clin Immunol 2019; 201:20-29. [PMID: 30807831 DOI: 10.1016/j.clim.2019.02.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 02/15/2019] [Accepted: 02/16/2019] [Indexed: 01/03/2023]
Abstract
Shellfish, including oysters, often cause allergic reactions in children and adults. Oysters are inevitably consumed because of its delicacy and nutritional benefit, leading to frequent occurrence of severe clinical symptoms observed in patients with oyster hypersensitivity. We aimed to identify the immunodominant epitopes of oyster tropomyosin and crucial amino acids for IgE binding, which will help us to further understand the immunochemical characteristics of Cra g 1. The potential epitopes were predicted by immunoinformatics tools and the resultant immunodominant epitopes were identified by inhibition ELISA with pooled sera and individual serum from oyster allergic patients. Surprisingly, homologous substitution of multiple amino acids led to obviously decrease affinity of IgE antibodies, but this manner did not abrogate binding completely. Five major linear epitopes were evenly distributed on the surface of homology-based Cra g 1 model and hydrophilic residues appeared to be the most important for IgE binding. These results not only offer a better understanding of the molecular mechanism of interaction between Cra g 1 and oyster-specific IgE but also have significance in clinical diagnosis and immunotherapy.
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21
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Leung ASY, Leung NYH, Wai CYY, Leung TF, Wong GWK. Allergen immunotherapy for food allergy from the Asian perspective: key challenges and opportunities. Expert Rev Clin Immunol 2018; 15:153-164. [PMID: 30488732 DOI: 10.1080/1744666x.2019.1554432] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Introduction: Prevalence of food allergy is rising in different regions of the world. Asia has not been spared from this epidemic, but epidemiological data have revealed a different pattern of food allergens in this continent. Allergen-specific immunotherapy (AIT) for food allergy, which has been revolutionary as the main focus of research in recent years, needs to be adapted for the different populations in Asia. Areas covered: Recent evidence shows increasing popularity and superiority of AIT over strict food avoidance as the cornerstone of food allergy management. Asia is a distinctive continent with specific food allergy triggers, in particular, seafood, and wheat. Peanut, on the contrary, is not a common food allergen in most parts of Asia. The common Asian food allergens, as well as the rapidly developing food-specific AIT in this region will be covered in this article. Expert commentary: Evidence on oral immunotherapy for wheat allergy and preclinical data on shellfish AIT are promising. Further work should be done on resolving cross-sensitization between environmental allergens with wheat and shellfish allergens, and a modified AIT approach to enhance the safety and effectiveness of food-specific immunotherapy.
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Affiliation(s)
- Agnes Sze Yin Leung
- a Department of Paediatrics , The Chinese University of Hong Kong, Prince of Wales Hospital Shatin , New Territories , Hong Kong
| | - Nicki Yat Hin Leung
- a Department of Paediatrics , The Chinese University of Hong Kong, Prince of Wales Hospital Shatin , New Territories , Hong Kong
| | - Christine Yee Yan Wai
- a Department of Paediatrics , The Chinese University of Hong Kong, Prince of Wales Hospital Shatin , New Territories , Hong Kong
| | - Ting Fan Leung
- a Department of Paediatrics , The Chinese University of Hong Kong, Prince of Wales Hospital Shatin , New Territories , Hong Kong
| | - Gary Wing Kin Wong
- a Department of Paediatrics , The Chinese University of Hong Kong, Prince of Wales Hospital Shatin , New Territories , Hong Kong
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22
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Liu GY, Mei XJ, Hu MJ, Yang Y, Liu M, Li MS, Zhang ML, Cao MJ, Liu GM. Analysis of the Allergenic Epitopes of Tropomyosin from Mud Crab Using Phage Display and Site-Directed Mutagenesis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:9127-9137. [PMID: 30107732 DOI: 10.1021/acs.jafc.8b03466] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Mud crab ( Scylla serrata), which is widely consumed, can cause severe allergic symptoms. Eight linear epitopes and seven conformational epitopes of tropomyosin (TM) from S. serrata were identified using phage display. The conformational epitopes were formed based on the coiled-coil structure of TM. Most of the epitopes were located in the regions where primary structures were conserved among crustacean TM. Twelve synthetic peptides were designed according to the epitopes and trypsin-cutting sites of TM, among them, three synthetic peptides (including one linear epitope and two conformational epitopes) were recognized by all of the patient sera using inhibitory dot blotting. A triple-variant (R90A-E164A-Y267A) was constructed based on the critical amino acids of the TM epitope. The IgE-binding activity of the triple-variant was significantly reduced compared with that of native TM. The results of phage display and site-directed mutagenesis offered new information regarding conformational epitopes of TM.
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Affiliation(s)
- Guang-Yu Liu
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources , Jimei University , Xiamen , Fujian China
| | - Xue-Jiao Mei
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources , Jimei University , Xiamen , Fujian China
| | - Meng-Jun Hu
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources , Jimei University , Xiamen , Fujian China
| | - Yang Yang
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources , Jimei University , Xiamen , Fujian China
| | - Meng Liu
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources , Jimei University , Xiamen , Fujian China
| | - Meng-Si Li
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources , Jimei University , Xiamen , Fujian China
| | - Ming-Li Zhang
- Xiamen Second Hospital , Xiamen , Fujian 361021 , China
| | - Min-Jie Cao
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources , Jimei University , Xiamen , Fujian China
| | - Guang-Ming Liu
- College of Food and Biological Engineering, Xiamen Key Laboratory of Marine Functional Food, Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources , Jimei University , Xiamen , Fujian China
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Lv L, Lin H, Li Z, Ahmed I, Mi N, Chen G. Allergenicity of acrolein-treated shrimp tropomyosin evaluated using RBL-2H3 cell and mouse model. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2018; 98:4374-4378. [PMID: 29427351 DOI: 10.1002/jsfa.8954] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 01/10/2018] [Accepted: 02/02/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Food processing effects can modify protein functional properties. However, protein was oxidized inevitably by lipid peroxidation during food processing. Acrolein, a primary by-product of lipid peroxidation, can modify the structural and functional properties of protein. The aim of the research was to analyze the effect of acrolein on allergenicity of TM, a major allergen in shrimp. RESULTS The overall allergenic effects of acrolein-treated TM were evaluated using female BALB/c mice and a mediator-releasing RBL-2H3 cell line. Acrolein-treated TM significantly decreased TM-specific immunoglobulin E/G1 levels, and histamine and mMCP-1 release in mouse serum. Release of inflammatory mediators such as β-hexosaminidase, histamine, cysteinyl leukotriene and prostaglandin D2 was clearly suppressed after acrolein treatment. CONCLUSION These results indicate that acrolein-induced tropomyosin modification can decrease the allergenicity of TM. This reduction contributes to allergenic potential changes in shrimp during processing and preservation. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Liangtao Lv
- Food Safety Laboratory, College of Food Science and Engineering, Ocean University of China, Qingdao, PR China
| | - Hong Lin
- Food Safety Laboratory, College of Food Science and Engineering, Ocean University of China, Qingdao, PR China
| | - Zhenxing Li
- Food Safety Laboratory, College of Food Science and Engineering, Ocean University of China, Qingdao, PR China
| | - Ishfaq Ahmed
- Food Safety Laboratory, College of Food Science and Engineering, Ocean University of China, Qingdao, PR China
| | - Nasha Mi
- Food Safety Laboratory, College of Food Science and Engineering, Ocean University of China, Qingdao, PR China
| | - Guanzhi Chen
- The Affiliated Hospital of Qingdao University, Qingdao, PR China
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James JK, Pike DH, Khan IJ, Nanda V. Structural and Dynamic Properties of Allergen and Non-Allergen Forms of Tropomyosin. Structure 2018; 26:997-1006.e5. [PMID: 29887498 PMCID: PMC6697176 DOI: 10.1016/j.str.2018.05.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Revised: 03/28/2018] [Accepted: 05/08/2018] [Indexed: 11/26/2022]
Abstract
To what extent do structural and biophysical features of food allergen proteins distinguish them from other proteins in our diet? Invertebrate tropomyosins (Tpms) as a class are considered "pan-allergens," inducing food allergy to shellfish and respiratory allergy to dust mites. Vertebrate Tpms are not known to elicit allergy or cross-reactivity, despite their high structural similarity and sequence identity to invertebrate homologs. We expect allergens are sufficiently stable against gastrointestinal proteases to survive for immune sensitization in the intestines, and that proteolytic stability will correlate with thermodynamic stability. Thermal denaturation of shrimp Tpm shows that it is more stable than non-allergen vertebrate Tpm. Shrimp Tpm is also more resistant to digestion. Molecular dynamics uncover local dynamics that select epitopes and global differences in flexibility between shrimp and pig Tpm that discriminate allergens from non-allergens. Molecular determinants of allergenicity depend not only on sequence but on contributions of protein structure and dynamics.
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Affiliation(s)
- Jose K James
- Center for Advanced Biotechnology and Medicine, Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School, Rutgers University, Piscataway, NJ 08854, USA
| | - Douglas H Pike
- Center for Advanced Biotechnology and Medicine, Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School, Rutgers University, Piscataway, NJ 08854, USA
| | - I John Khan
- Center for Advanced Biotechnology and Medicine, Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School, Rutgers University, Piscataway, NJ 08854, USA
| | - Vikas Nanda
- Center for Advanced Biotechnology and Medicine, Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School, Rutgers University, Piscataway, NJ 08854, USA.
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25
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Seafood allergy: A comprehensive review of fish and shellfish allergens. Mol Immunol 2018; 100:28-57. [PMID: 29858102 DOI: 10.1016/j.molimm.2018.04.008] [Citation(s) in RCA: 183] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2018] [Revised: 04/11/2018] [Accepted: 04/16/2018] [Indexed: 11/23/2022]
Abstract
Seafood refers to several distinct groups of edible aquatic animals including fish, crustacean, and mollusc. The two invertebrate groups of crustacean and mollusc are, for culinary reasons, often combined as shellfish but belong to two very different phyla. The evolutionary and taxonomic diversity of the various consumed seafood species poses a challenge in the identification and characterisation of the major and minor allergens critical for reliable diagnostics and therapeutic treatments. Many allergenic proteins are very different between these groups; however, some pan-allergens, including parvalbumin, tropomyosin and arginine kinase, seem to induce immunological and clinical cross-reactivity. This extensive review details the advances in the bio-molecular characterisation of 20 allergenic proteins within the three distinct seafood groups; fish, crustacean and molluscs. Furthermore, the structural and biochemical properties of the major allergens are described to highlight the immunological and subsequent clinical cross-reactivities. A comprehensive list of purified and recombinant allergens is provided, and the applications of component-resolved diagnostics and current therapeutic developments are discussed.
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Mazzucchelli G, Holzhauser T, Cirkovic Velickovic T, Diaz‐Perales A, Molina E, Roncada P, Rodrigues P, Verhoeckx K, Hoffmann‐Sommergruber K. Current (Food) Allergenic Risk Assessment: Is It Fit for Novel Foods? Status Quo and Identification of Gaps. Mol Nutr Food Res 2018; 62:1700278. [PMID: 28925060 PMCID: PMC5814866 DOI: 10.1002/mnfr.201700278] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 07/28/2017] [Indexed: 01/08/2023]
Abstract
Food allergies are recognized as a global health concern. In order to protect allergic consumers from severe symptoms, allergenic risk assessment for well-known foods and foods containing genetically modified ingredients is installed. However, population is steadily growing and there is a rising need to provide adequate protein-based foods, including novel sources, not yet used for human consumption. In this context safety issues such as a potential increased allergenic risk need to be assessed before marketing novel food sources. Therefore, the established allergenic risk assessment for genetically modified organisms needs to be re-evaluated for its applicability for risk assessment of novel food proteins. Two different scenarios of allergic sensitization have to be assessed. The first scenario is the presence of already known allergenic structures in novel foods. For this, a comparative assessment can be performed and the range of cross-reactivity can be explored, while in the second scenario allergic reactions are observed toward so far novel allergenic structures and no reference material is available. This review summarizes the current analytical methods for allergenic risk assessment, highlighting the strengths and limitations of each method and discussing the gaps in this assessment that need to be addressed in the near future.
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Affiliation(s)
- Gabriel Mazzucchelli
- Laboratory of Mass Spectrometry – MolSysDepartment of ChemistryUniversity of LiegeLiegeBelgium
| | | | - Tanja Cirkovic Velickovic
- Center of Excellence for Molecular Food SciencesUniversity of Belgrade – Faculty of ChemistryBelgradeSerbia
- Ghent University Global CampusYeonsu‐guIncheonSouth Korea
| | | | | | - Paola Roncada
- Istituto Sperimentale Italiano Lazzaro SpallanzaniMilanoItaly
| | - Pedro Rodrigues
- CCMARCenter of Marine ScienceUniversity of AlgarveFaroPortugal
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McClain S. Bioinformatic screening and detection of allergen cross-reactive IgE-binding epitopes. Mol Nutr Food Res 2017; 61. [PMID: 28191711 PMCID: PMC5573986 DOI: 10.1002/mnfr.201600676] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 01/19/2017] [Accepted: 01/25/2017] [Indexed: 11/15/2022]
Abstract
Protein allergens can be related by cross‐reactivity. Allergens that share relevant sequence can cross‐react, those lacking sufficient similarity in their IgE antibody‐binding epitopes do not cross‐react. Cross‐reactivity is based on shared epitopes that is based on shared sequence and higher level structure (charge and shape). Epitopes are important in predicting cross‐reactivity potential and may provide the potential to establish criteria that identify homology among allergens. Selected allergen's IgE‐binding epitope sequences were used to determine how the FASTA algorithm could be used to identify a threshold of significance. A statistical measure (expectation value, E‐value) was used to identify a threshold specific to identifying cross‐reactivity potential. Peanut Ara h 1 and Ara h 2, shrimp tropomyosin Pen a 1, and birch tree pollen allergen, Bet v 1 were sources of known epitopes. Each epitope or set of epitopes was inserted into random amino acid sequence to create hypothetical proteins used as queries to an allergen database. Alignments with allergens were noted for the ability to match the epitope's source allergen as well as any cross‐reactive or other homologous allergens. A FASTA expectation value range (1 × 10−5–1 × 10−6) was identified that could act as a threshold to help identify cross‐reactivity potential.
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Mahajan A, Youssef LA, Cleyrat C, Grattan R, Lucero SR, Mattison CP, Erasmus MF, Jacobson B, Tapia L, Hlavacek WS, Schuyler M, Wilson BS. Allergen Valency, Dose, and FcεRI Occupancy Set Thresholds for Secretory Responses to Pen a 1 and Motivate Design of Hypoallergens. THE JOURNAL OF IMMUNOLOGY 2016; 198:1034-1046. [PMID: 28039304 DOI: 10.4049/jimmunol.1601334] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 11/30/2016] [Indexed: 11/19/2022]
Abstract
Ag-mediated crosslinking of IgE-FcεRI complexes activates mast cells and basophils, initiating the allergic response. Of 34 donors recruited having self-reported shrimp allergy, only 35% had significant levels of shrimp-specific IgE in serum and measurable basophil secretory responses to rPen a 1 (shrimp tropomyosin). We report that degranulation is linked to the number of FcεRI occupied with allergen-specific IgE, as well as the dose and valency of Pen a 1. Using clustered regularly interspaced palindromic repeat-based gene editing, human RBLrαKO cells were created that exclusively express the human FcεRIα subunit. Pen a 1-specific IgE was affinity purified from shrimp-positive plasma. Cells primed with a range of Pen a 1-specific IgE and challenged with Pen a 1 showed a bell-shaped dose response for secretion, with optimal Pen a 1 doses of 0.1-10 ng/ml. Mathematical modeling provided estimates of receptor aggregation kinetics based on FcεRI occupancy with IgE and allergen dose. Maximal degranulation was elicited when ∼2700 IgE-FcεRI complexes were occupied with specific IgE and challenged with Pen a 1 (IgE epitope valency of ≥8), although measurable responses were achieved when only a few hundred FcεRI were occupied. Prolonged periods of pepsin-mediated Pen a 1 proteolysis, which simulates gastric digestion, were required to diminish secretory responses. Recombinant fragments (60-79 aa), which together span the entire length of tropomyosin, were weak secretagogues. These fragments have reduced dimerization capacity, compete with intact Pen a 1 for binding to IgE-FcεRI complexes, and represent a starting point for the design of promising hypoallergens for immunotherapy.
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Affiliation(s)
- Avanika Mahajan
- Department of Pathology, University of New Mexico, Albuquerque, NM 87131
| | - Lama A Youssef
- Department of Pharmaceutics and Pharmaceutical Technology, School of Pharmacy, Damascus University, Damascus, Syria.,National Commission for Biotechnology, Damascus, Syria
| | - Cédric Cleyrat
- Department of Pathology, University of New Mexico, Albuquerque, NM 87131
| | - Rachel Grattan
- Department of Pathology, University of New Mexico, Albuquerque, NM 87131
| | - Shayna R Lucero
- Department of Pathology, University of New Mexico, Albuquerque, NM 87131
| | - Christopher P Mattison
- Southern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, New Orleans, LA 70124
| | - M Frank Erasmus
- Department of Pathology, University of New Mexico, Albuquerque, NM 87131
| | - Bruna Jacobson
- Department of Computer Sciences, University of New Mexico, Albuquerque, NM 87131
| | - Lydia Tapia
- Department of Computer Sciences, University of New Mexico, Albuquerque, NM 87131
| | - William S Hlavacek
- Theoretical Biology and Biophysics Group, Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545.,Theoretical Biology and Biophysics Group, Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, NM 87545; and
| | - Mark Schuyler
- Department of Medicine, University of New Mexico, Albuquerque, NM 87131
| | - Bridget S Wilson
- Department of Pathology, University of New Mexico, Albuquerque, NM 87131;
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Pedrosa M, Boyano-Martínez T, García-Ara C, Quirce S. Shellfish Allergy: a Comprehensive Review. Clin Rev Allergy Immunol 2016; 49:203-16. [PMID: 24870065 DOI: 10.1007/s12016-014-8429-8] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Shellfish allergy is of increasing concern, as its prevalence has risen in recent years. Many advances have been made in allergen characterization. B cell epitopes in the major allergen tropomyosin have been characterized. In addition to tropomyosin, arginine kinase, sarcoplasmic calcium-binding protein, and myosin light chain have recently been reported in shellfish. All are proteins that play a role in muscular contraction. Additional allergens such as hemocyanin have also been described. The effect of processing methods on these allergens has been studied, revealing thermal stability and resistance to peptic digestion in some cases. Modifications after Maillard reactions have also been addressed, although in some cases with conflicting results. In recent years, new hypoallergenic molecules have been developed, which constitute a new therapeutic approach to allergic disorders. A recombinant hypoallergenic tropomyosin has been developed, which opens a new avenue in the treatment of shellfish allergy. Cross-reactivity with species that are not closely related is common in shellfish-allergic patients, as many of shellfish allergens are widely distributed panallergens in invertebrates. Cross-reactivity with house dust mites is well known, but other species can also be involved in this phenomenon.
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Affiliation(s)
- María Pedrosa
- Allergy Department, Hospital La Paz Institute for Health Research (IdiPAZ), Paseo de la Castellana 261, 28046, Madrid, Spain.
| | - Teresa Boyano-Martínez
- Allergy Department, Hospital La Paz Institute for Health Research (IdiPAZ), Paseo de la Castellana 261, 28046, Madrid, Spain
| | - Carmen García-Ara
- Allergy Department, Hospital La Paz Institute for Health Research (IdiPAZ), Paseo de la Castellana 261, 28046, Madrid, Spain
| | - Santiago Quirce
- Allergy Department, Hospital La Paz Institute for Health Research (IdiPAZ), Paseo de la Castellana 261, 28046, Madrid, Spain
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Hoard B, Jacobson B, Manavi K, Tapia L. Extending rule-based methods to model molecular geometry and 3D model resolution. BMC SYSTEMS BIOLOGY 2016; 10 Suppl 2:48. [PMID: 27490268 PMCID: PMC4977479 DOI: 10.1186/s12918-016-0294-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
BACKGROUND Computational modeling is an important tool for the study of complex biochemical processes associated with cell signaling networks. However, it is challenging to simulate processes that involve hundreds of large molecules due to the high computational cost of such simulations. Rule-based modeling is a method that can be used to simulate these processes with reasonably low computational cost, but traditional rule-based modeling approaches do not include details of molecular geometry. The incorporation of geometry into biochemical models can more accurately capture details of these processes, and may lead to insights into how geometry affects the products that form. Furthermore, geometric rule-based modeling can be used to complement other computational methods that explicitly represent molecular geometry in order to quantify binding site accessibility and steric effects. RESULTS We propose a novel implementation of rule-based modeling that encodes details of molecular geometry into the rules and binding rates. We demonstrate how rules are constructed according to the molecular curvature. We then perform a study of antigen-antibody aggregation using our proposed method. We simulate the binding of antibody complexes to binding regions of the shrimp allergen Pen a 1 using a previously developed 3D rigid-body Monte Carlo simulation, and we analyze the aggregate sizes. Then, using our novel approach, we optimize a rule-based model according to the geometry of the Pen a 1 molecule and the data from the Monte Carlo simulation. We use the distances between the binding regions of Pen a 1 to optimize the rules and binding rates. We perform this procedure for multiple conformations of Pen a 1 and analyze the impact of conformation and resolution on the optimal rule-based model. CONCLUSIONS We find that the optimized rule-based models provide information about the average steric hindrance between binding regions and the probability that antibodies will bind to these regions. These optimized models quantify the variation in aggregate size that results from differences in molecular geometry and from model resolution.
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Affiliation(s)
- Brittany Hoard
- Department of Computer Science, University of New Mexico, Albuquerque, 87131, New Mexico, USA
| | - Bruna Jacobson
- Department of Computer Science, University of New Mexico, Albuquerque, 87131, New Mexico, USA
| | - Kasra Manavi
- Department of Computer Science, University of New Mexico, Albuquerque, 87131, New Mexico, USA
| | - Lydia Tapia
- Department of Computer Science, University of New Mexico, Albuquerque, 87131, New Mexico, USA.
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Abstract
Shellfish are diverse, serve as main constituents of seafood, and are extensively consumed globally because of their nutritional values. Consequently, increase in reports of IgE-mediated seafood allergy is particularly food associated to shellfish. Seafood-associated shellfish consists of crustaceans (decapods, stomatopods, barnacles, and euphausiids) and molluskans (gastropods, bivalves, and cephalopods) and its products can start from mild local symptoms and lead to severe systemic anaphylactic reactions through ingestion, inhalation, or contact like most other food allergens. Globally, the most commonly causative shellfish are shrimps, crabs, lobsters, clams, oysters, and mussels. The prevalence of shellfish allergy is estimated to be 0.5-2.5% of the general population but higher in coastal Asian countries where shellfish constitute a large proportion of the diet. Diversity in allergens such as tropomyosin, arginine kinase, myosin light chain, and sarcoplasmic binding protein are from crustaceans whereas tropomyosin, paramyosin, troponin, actine, amylase, and hemoyanin are reported from molluskans shellfish. Tropomyosin is the major allergen and is responsible for cross-reactivity between shellfish and other invertebrates, within crustaceans, within molluskans, between crustaceans vs. molluskans as well as between shellfish and fish. Allergenicity diagnosis requires clinical history, in vivo skin prick testing, in vitro quantification of IgE, immunoCAP, and confirmation by oral challenge testing unless the reactions borne by it are life-threatening. This comprehensive review provides the update and new findings in the area of shellfish allergy including demographic, diversity of allergens, allergenicity, their cross-reactivity, and innovative molecular genetics approaches in diagnosing and managing this life-threatening as well as life-long disease.
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Affiliation(s)
- Samanta S Khora
- a Medical Biotechnology Lab, Department of Medical Biotechnology , School of Biosciences and Technology, VIT University , Vellore , India
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Cantillo JF, Puerta L, Lafosse-Marin S, Subiza JL, Caraballo L, Fernández-Caldas E. Identification and Characterization of IgE-Binding Tropomyosins in Aedes aegypti. Int Arch Allergy Immunol 2016; 170:46-56. [PMID: 27355916 DOI: 10.1159/000447298] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 05/31/2016] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The mosquito Aedes aegypti is a potential source of important clinically relevant allergens. However, the allergenicity and cross-reactivity of most of these has not been fully described. METHODS Natural wild-type mosquito tropomyosin was purified by size exclusion and anionic-exchange chromatography from an A. aegypti extract. Further characterization was accomplished by MALDI-TOF/TOF. Two recombinant variants of tropomyosin were obtained by expression in Escherichia coli. Specific IgE measurement by ELISA and skin tests for mosquito extract were performed in 12 patients with asthma or allergy rhinitis residing on the Caribbean island of Martinique. Cross-reactivity between natural A. aegypti tropomyosin and recombinant tropomyosins from A. aegypti, house dust mite, shrimp and Ascaris lumbricoides was analyzed by ELISA competition. RESULTS Four variants of natural tropomyosin were purified. A band of 32 kDa in SDS-PAGE representing 2 tropomyosin variants (Aed a 10.0101 and Aed a 10.0201) reacted with specific IgE of 4 of the 12 (33%) allergic patients and with rabbit polyclonal anti-shrimp tropomyosin. A high degree of cross-reactivity (60-70%) was detected between natural mosquito tropomyosin and Blo t 10, Der p 10 and Lit v 1, and a lower degree with Asc l 3 from A. lumbricoides (<30%). rAed a 10.0101 inhibited IgE binding to natural A. aegypti tropomyosin; however, rAed a 10.0201 showed a low inhibitory capacity. CONCLUSION Tropomyosin is a new IgE-binding protein from A. aegypti. Two of the 4 variants identified showed different degree of cross-reactivity with tropomyosins from other arthropods. The potential allergenic role of each variant should be further investigated.
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Abstract
SUMMARYIt is estimated that allergies afflict up to 40% of the world's population. A primary mediator for allergies is the aggregation of antigens and IgE antibodies bound to cell-surface receptors, FcεRI. Antibody/antigen aggregate formation causes stimulation of mast cells and basophils, initiating cellular degranulation and releasing immune mediators which produce an allergic or anaphylactic response. Understanding the shape and structure of these aggregates can provide critical insights into the allergic response. We have previously developed methods to geometrically model, simulate and analyze antibody aggregation inspired by rigid body robotic motion simulations. Our technique handles the large size and number of molecules involved in aggregation, providing an advantage over traditional simulations such as molecular dynamics (MD) and coarse-grained energetic models. In this paper, we study the impact of model resolution on simulations of geometric structures using both our previously developed Monte Carlo simulation and a novel application of rule-based modeling. These methods complement each other, the former providing explicit geometric detail and the latter providing a generic representation where multiple resolutions can be captured. Our exploration is focused on two antigens, a man-made antigen with three binding sites, DF3, and a common shrimp allergen (antigen), Pen a 1. We find that impact of resolution is minimal for DF3, a small globular antigen, but has a larger impact on Pen a 1, a rod-shaped molecule. The volume reduction caused by the loss in resolution allows more binding site accessibility, which can be quantified using a rule-based model with implicit geometric input. Clustering analysis of our simulation shows good correlation when compared with available experimental results. Moreover, collisions in all-atom reconstructions are negligible, at around 0.2% at 90% reduction.
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van Broekhoven S, Bastiaan-Net S, de Jong NW, Wichers HJ. Influence of processing and in vitro digestion on the allergic cross-reactivity of three mealworm species. Food Chem 2015; 196:1075-83. [PMID: 26593591 DOI: 10.1016/j.foodchem.2015.10.033] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Revised: 08/21/2015] [Accepted: 10/10/2015] [Indexed: 11/26/2022]
Abstract
Edible insects are currently being evaluated as an alternative and more sustainable protein source for humans. The introduction of new food sources can lead to development of novel allergies. Because in the Western world, insects are unlikely to be consumed raw, it is important to know how processing and in vitro digestion might influence their allergenicity. Three edible mealworm species (Tenebrio molitor, Zophobas atratus and Alphitobius diaperinus) subjected to processing and in vitro digestion were analysed for IgE cross-reactivity. Immunoblot and MALDI-MS/MS analyses revealed that IgE from crustaceans or House dust mite (HDM) allergic patients showed cross-reactivity to mealworm tropomyosin or α-amylase, hexamerin 1B precursor and muscle myosin, respectively. Heat processing as well as in vitro digestion did diminish, but not eliminate, HDM or tropomyosin IgE cross-reactivity. Results show that individuals allergic to HDM or crustaceans might be at risk when consuming mealworms, even after heat processing.
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Affiliation(s)
- Sarah van Broekhoven
- Laboratory of Entomology, Wageningen University and Research Centre, Droevendaalsesteeg 1, 6708PB Wageningen, The Netherlands.
| | - Shanna Bastiaan-Net
- Food and Biobased Research, Wageningen University and Research Centre, Bornse Weilanden 9, 6708WG Wageningen, The Netherlands.
| | - Nicolette W de Jong
- Department of Internal Medicine, Section Allergology, Erasmus Medical Centre, Dr. Molewaterplein 40, 3015GD Rotterdam, The Netherlands.
| | - Harry J Wichers
- Food and Biobased Research, Wageningen University and Research Centre, Bornse Weilanden 9, 6708WG Wageningen, The Netherlands.
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Wong L, Huang CH, Lee BW. Shellfish and House Dust Mite Allergies: Is the Link Tropomyosin? ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2015; 8:101-6. [PMID: 26739402 PMCID: PMC4713872 DOI: 10.4168/aair.2016.8.2.101] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Accepted: 05/12/2015] [Indexed: 11/20/2022]
Abstract
Crustacean shellfish allergy is an important cause of food allergy and anaphylaxis in Asia. The major allergen in shellfish allergy is tropomyosin, a pan-allergen that is also found in house dust mites and cockroaches. Tropomyosins from house dust mites (HDMs) have a high sequence homology to shellfish tropomyosins, and cross-reactivity between HDM and shrimp tropomyosins has been demonstrated. Exposure to inhaled tropomyosins from house dust mites has been postulated to be the primary sensitizer for shellfish allergy, in a reaction analogous to the oral allergy (inhalant-food) syndrome. This notion is supported by indirect data from the effects of HDM immunotherapy on shellfish allergy, and strong correlations of shellfish and HDM sensitization. HDM immunotherapy has been reported to induce both shrimp allergy in non-allergic patients and shrimp tolerance in shrimp-allergic patients. Epidemiological surveys have also demonstrated a strong correlation between shellfish and HDM sensitization in both hospital-based and community-based studies. Unexposed populations have also been shown to develop sensitization-shellfish sensitization in orthodox Jews with no history of shellfish consumption was associated with HDM sensitization. Reciprocally, HDM sensitization in an Icelandic population living in a HDM-free environment was associated with shrimp sensitization. In vitro IgE inhibition studies on sera in shrimp-allergic Spanish patients indicate that mites are the primary sensitizer in shrimp-allergic patients living in humid and warm climates. Current data supports the hypothesis that tropomyosin is the link between HDM and shellfish allergies. The role of tropomyosin in HDM and shellfish allergies is a fertile field for investigation as it may provide novel immunotherapeutic strategies for shellfish allergy.
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Affiliation(s)
- Lydia Wong
- Pediatrics, Khoo Teck Puat-National University Children's Medical Institute, National University Health System, Singapore
| | - Chiung Hui Huang
- Pediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Bee Wah Lee
- Pediatrics, Khoo Teck Puat-National University Children's Medical Institute, National University Health System, Singapore.,Pediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
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Toomer OT, Do AB, Fu TJ, Williams KM. Digestibility and Immunoreactivity of Shrimp Extracts Using anIn VitroDigestibility Model with Pepsin and Pancreatin. J Food Sci 2015; 80:T1633-9. [DOI: 10.1111/1750-3841.12917] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Accepted: 04/26/2015] [Indexed: 11/28/2022]
Affiliation(s)
- Ondulla T. Toomer
- U.S. Food and Drug Administration; Laurel MD 20708 U.S.A
- U.S. Food and Drug Administration; Natl. Center for Food Safety and Technology; Moffett Campus Bedford Park IL 60501 U.S.A
| | - Andrew B. Do
- U.S. Food and Drug Administration; Laurel MD 20708 U.S.A
| | - Tong J. Fu
- U.S. Food and Drug Administration; Natl. Center for Food Safety and Technology; Moffett Campus Bedford Park IL 60501 U.S.A
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Yang Y, Cao MJ, Alcocer M, Liu QM, Fei DX, Mao HY, Liu GM. Mapping and characterization of antigenic epitopes of arginine kinase of Scylla paramamosain. Mol Immunol 2015; 65:310-20. [DOI: 10.1016/j.molimm.2015.02.010] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Revised: 02/05/2015] [Accepted: 02/09/2015] [Indexed: 01/30/2023]
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Fernandes TJR, Costa J, Oliveira MBPP, Mafra I. An overview on fish and shellfish allergens and current methods of detection. FOOD AGR IMMUNOL 2015. [DOI: 10.1080/09540105.2015.1039497] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Affiliation(s)
- Telmo J. R. Fernandes
- REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Fernandes, 228, 4050-313 Porto, Portugal
| | - Joana Costa
- REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Fernandes, 228, 4050-313 Porto, Portugal
| | - M. Beatriz P. P. Oliveira
- REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Fernandes, 228, 4050-313 Porto, Portugal
| | - Isabel Mafra
- REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Fernandes, 228, 4050-313 Porto, Portugal
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Sharma P, Gaur SN, Goel N, Arora N. Engineered hypoallergenic variants of osmotin demonstrate hypoallergenicity with in vitro and in vivo methods. Mol Immunol 2015; 64:46-54. [DOI: 10.1016/j.molimm.2014.10.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 10/13/2014] [Accepted: 10/25/2014] [Indexed: 12/15/2022]
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Sun C, Fu LL, Wang Y. IgE- and T-lymphocyte-Dependent Hypersensitivity Responses Induced in Mice by Exposure to Shrimp (Fenneropenaeus chinensis) Proteins. FOOD AGR IMMUNOL 2015. [DOI: 10.1080/09540105.2014.998635] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Leung NYH, Wai CYY, Shu S, Wang J, Kenny TP, Chu KH, Leung PSC. Current immunological and molecular biological perspectives on seafood allergy: a comprehensive review. Clin Rev Allergy Immunol 2014; 46:180-97. [PMID: 23242979 DOI: 10.1007/s12016-012-8336-9] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Seafood is an important component in human diet and nutrition worldwide. However, seafood also constitutes one of the most important groups of foods in the induction of immediate (type I) food hypersensitivity, which significantly impacts the quality of life and healthcare cost. Extensive efforts within the past two decades have revealed the molecular identities and immunological properties of the major fish and shellfish allergens. The major allergen involved in allergy and cross-reactivity among different fish species was identified as parvalbumin while that responsible for shellfish (crustaceans and mollusks) allergy was identified as tropomyosin. The cloning and expression of the recombinant forms of these seafood allergens facilitate the investigation on the detailed mechanisms leading to seafood allergies, mapping of IgE-binding epitopes, and assessment of their allergenicity and stability. Future research focusing on the immunological cross-reactivity and discovery of novel allergens will greatly facilitate the management of seafood allergies and the design of effective and life-long allergen-specific immunotherapies.
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Affiliation(s)
- Nicki Y H Leung
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
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42
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Immunization with Hypoallergens of shrimp allergen tropomyosin inhibits shrimp tropomyosin specific IgE reactivity. PLoS One 2014; 9:e111649. [PMID: 25365343 PMCID: PMC4218792 DOI: 10.1371/journal.pone.0111649] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Accepted: 09/29/2014] [Indexed: 02/06/2023] Open
Abstract
Designer proteins deprived of its IgE-binding reactivity are being sought as a regimen for allergen-specific immunotherapy. Although shrimp tropomyosin (Met e 1) has long been identified as the major shellfish allergen, no immunotherapy is currently available. In this study, we aim at identifying the Met e 1 IgE epitopes for construction of hypoallergens and to determine the IgE inhibitory capacity of the hypoallergens. IgE-binding epitopes were defined by three online computational models, ELISA and dot-blot using sera from shrimp allergy patients. Based on the epitope data, two hypoallergenic derivatives were constructed by site-directed mutagenesis (MEM49) and epitope deletion (MED171). Nine regions on Met e 1 were defined as the major IgE-binding epitopes. Both hypoallergens MEM49 and MED171 showed marked reduction in their in vitro reactivity towards IgE from shrimp allergy patients and Met e 1-sensitized mice, as well as considerable decrease in induction of mast cell degranulation as demonstrated in passive cutaneous anaphylaxis assay. Both hypoallergens were able to induce Met e 1-recognizing IgG antibodies in mice, specifically IgG2a antibodies, that strongly inhibited IgE from shrimp allergy subjects and Met e 1-sensitized mice from binding to Met e 1. These results indicate that the two designer hypoallergenic molecules MEM49 and MED171 exhibit desirable preclinical characteristics, including marked reduction in IgE reactivity and allergenicity, as well as ability to induce blocking IgG antibodies. This approach therefore offers promises for development of immunotherapeutic regimen for shrimp tropomyosin allergy.
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Koeberl M, Kamath SD, Saptarshi SR, Smout MJ, Rolland JM, O'Hehir RE, Lopata AL. Auto-induction for high yield expression of recombinant novel isoallergen tropomyosin from King prawn (Melicertus latisulcatus) for improved diagnostics and immunotherapeutics. J Immunol Methods 2014; 415:6-16. [PMID: 25450004 DOI: 10.1016/j.jim.2014.10.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Revised: 10/20/2014] [Accepted: 10/20/2014] [Indexed: 01/18/2023]
Abstract
Food allergies are increasing worldwide, demonstrating a considerable public health concern. Shellfish allergy is one of the major food groups causing allergic sensitization among adults and children, affecting up to 2% of the general world population. Tropomyosin (TM) is the major allergen in shellfish and frequently used in the diagnosis of allergic sensitization and the detection of cross-contaminated food. To improve and establish better and more sensitive diagnostics for allergies and immunotherapeutics, large quantities of pure allergens are required. To establish a reproducible method for the generation of pure recombinant tropomyosin we utilized in this study different Escherichia coli strains (NM522, TOP10 and BL21(DE3)RIPL). In addition, isopropyl-β-D-thiogalactoside (IPTG) induction was compared with a novel auto-induction system to allow the generation of larger quantities of recombinant allergen. We demonstrated that the B-strain of E. coli is better for the expression of TM compared to the K-strain. Moreover, a higher yield could be achieved when using the auto-induction system, with up to 62 mg/l. High yield expressed recombinant TM from King prawn (KP) was compared to recombinant TM from Black tiger prawn (Pen m 1). We demonstrated that recombinant TM from KP and known isoallergen Pen m 1 have very similar molecular and immunological characteristics. Overall, we demonstrate that auto-induction can be used to express larger quantities of recombinant allergens for the development of diagnostic, to quantify allergens as well as immunotherapeutics employing isoallergens.
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Affiliation(s)
- Martina Koeberl
- Molecular Immunology Group, James Cook University, Townsville, QLD, Australia; Centre for Biodiscovery and Molecular Discovery of Therapeutics, James Cook University, Townsville, QLD, Australia; Comparative Genomic Centre, James Cook University, Townsville, QLD, Australia; Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, QLD, Australia
| | - Sandip D Kamath
- Molecular Immunology Group, James Cook University, Townsville, QLD, Australia; Centre for Biodiscovery and Molecular Discovery of Therapeutics, James Cook University, Townsville, QLD, Australia; Comparative Genomic Centre, James Cook University, Townsville, QLD, Australia; Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, QLD, Australia
| | - Shruti R Saptarshi
- Molecular Immunology Group, James Cook University, Townsville, QLD, Australia; Centre for Biodiscovery and Molecular Discovery of Therapeutics, James Cook University, Townsville, QLD, Australia; Comparative Genomic Centre, James Cook University, Townsville, QLD, Australia; Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, QLD, Australia
| | - Michael J Smout
- Centre for Biodiscovery and Molecular Discovery of Therapeutics, James Cook University, Townsville, QLD, Australia; Queensland Tropical Health Alliance, James Cook University, Cairns, QLD, Australia; Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, QLD, Australia
| | - Jennifer M Rolland
- Department of Immunology, Monash University, Melbourne, Victoria, Australia; Department of Allergy, Immunology and Respiratory Medicine, The Alfred Hospital and Monash University, Melbourne, Victoria, Australia
| | - Robyn E O'Hehir
- Department of Immunology, Monash University, Melbourne, Victoria, Australia; Department of Allergy, Immunology and Respiratory Medicine, The Alfred Hospital and Monash University, Melbourne, Victoria, Australia
| | - Andreas L Lopata
- Molecular Immunology Group, James Cook University, Townsville, QLD, Australia; Centre for Biodiscovery and Molecular Discovery of Therapeutics, James Cook University, Townsville, QLD, Australia; Comparative Genomic Centre, James Cook University, Townsville, QLD, Australia; Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, QLD, Australia.
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Gámez C, Zafra MP, Sanz V, Mazzeo C, Ibáñez MD, Sastre J, del Pozo V. Simulated gastrointestinal digestion reduces the allergic reactivity of shrimp extract proteins and tropomyosin. Food Chem 2014; 173:475-81. [PMID: 25466048 DOI: 10.1016/j.foodchem.2014.10.063] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Revised: 09/25/2014] [Accepted: 10/10/2014] [Indexed: 11/16/2022]
Abstract
Shrimp are highly allergenic foods. Current management are limited to the avoidance of foods. Therefore, there is an unmet need for a safe and effective therapy using modified allergens. This study focuses on assessing the potential for modification of the allergenicity of shrimp proteins following heat treatment or simulated gastric digestion. Shrimp proteins do not reduce their IgE reactivity after heat treatment but it is reduced by simulated gastric digestion in a time- and dose-dependent manner. Tropomyosin in shrimp extract is worse digested than purified tropomyosin. After 60 min of 10 U/μg pepsin digestion, a strong inhibition was produced in the in vivo skin reactivity of shrimp extracts and in activation of basophils from allergic patients. Immunisation experiments performed in rabbits demonstrated that digested boiled shrimp extract is able to induce IgG antibodies that block the IgE binding to the untreated boiled shrimp extract in shrimp-allergic patients. Building on our observations, digestion treatment could be an effective method for reducing shrimp allergenicity while maintaining the immunogenicity.
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Affiliation(s)
- Cristina Gámez
- Immunology Department, IIS-Fundación Jiménez Díaz, Spain; CIBER de Enfermedades Respiratorias (CIBERES), Spain
| | - Ma Paz Zafra
- Immunology Department, IIS-Fundación Jiménez Díaz, Spain; CIBER de Enfermedades Respiratorias (CIBERES), Spain
| | - Verónica Sanz
- Immunology Department, IIS-Fundación Jiménez Díaz, Spain; CIBER de Enfermedades Respiratorias (CIBERES), Spain
| | - Carla Mazzeo
- Immunology Department, IIS-Fundación Jiménez Díaz, Spain; CIBER de Enfermedades Respiratorias (CIBERES), Spain
| | | | - Joaquín Sastre
- CIBER de Enfermedades Respiratorias (CIBERES), Spain; Allergy Department, IIS-Fundación Jiménez Díaz, Spain
| | - Victoria del Pozo
- Immunology Department, IIS-Fundación Jiménez Díaz, Spain; CIBER de Enfermedades Respiratorias (CIBERES), Spain.
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45
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Kamath SD, Thomassen MR, Saptarshi SR, Nguyen HM, Aasmoe L, Bang BE, Lopata AL. Molecular and immunological approaches in quantifying the air-borne food allergen tropomyosin in crab processing facilities. Int J Hyg Environ Health 2014; 217:740-50. [DOI: 10.1016/j.ijheh.2014.03.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Revised: 03/08/2014] [Accepted: 03/08/2014] [Indexed: 11/16/2022]
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46
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Determination of microheterogeneous substitution in shrimp tropomyosin and its effect on IgE-binding capacity. Eur Food Res Technol 2014. [DOI: 10.1007/s00217-014-2291-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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47
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Kamath SD, Rahman AMA, Voskamp A, Komoda T, Rolland JM, O'Hehir RE, Lopata AL. Effect of heat processing on antibody reactivity to allergen variants and fragments of black tiger prawn: A comprehensive allergenomic approach. Mol Nutr Food Res 2014; 58:1144-55. [PMID: 24420734 DOI: 10.1002/mnfr.201300584] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2013] [Revised: 11/07/2013] [Accepted: 11/27/2013] [Indexed: 11/08/2022]
Abstract
SCOPE Prawn allergy is one of the leading causes of IgE-mediated hypersensitivity to food. Alterations of IgE-antibody reactivity to prawn allergens due to thermal processing are not fully understood. The aim of this study was to analyze the impact of heating on prawn allergens using a comprehensive allergenomic approach. METHODS AND RESULTS Proteins from raw and heat-processed black tiger prawn (Penaeus monodon) extracts as well as recombinant tropomyosin (rPen m1) were analyzed by SDS-PAGE and immunoblotting using sera from 16 shellfish allergic patients. IgE antibody binding proteins were identified by advanced mass spectroscopy, characterized by molecular structure analysis and their IgE reactivity compared among the prepared black tiger prawn extracts. Heat processing enhanced the overall patient IgE binding to prawn extracts and increased recognition of a number of allergen variants and fragments of prawn allergens. Allergens identified were tropomyosin, myosin light chain, sarcoplasmic calcium binding protein, and putative novel allergens including triose phosphate isomerase, aldolase, and titin. CONCLUSION Seven allergenic proteins are present in prawns, which are mostly heat-stable and form dimers or oligomers. Thermal treatment enhanced antibody reactivity to prawn allergens as well as fragments and should be considered in the diagnosis of prawn allergy and detection of crustacean allergens in processed food.
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Affiliation(s)
- Sandip D Kamath
- School of Pharmacy and Molecular Science, Centre for Biodiscovery and Molecular Development of Therapeutics, James Cook University, Townsville, Queensland, Australia
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Mirsky HP, Cressman RF, Ladics GS. Comparative assessment of multiple criteria for the in silico prediction of cross-reactivity of proteins to known allergens. Regul Toxicol Pharmacol 2013; 67:232-9. [PMID: 23933007 DOI: 10.1016/j.yrtph.2013.08.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Revised: 07/31/2013] [Accepted: 08/01/2013] [Indexed: 10/26/2022]
Abstract
Genetically modified crops are becoming important components of a sustainable food supply and must be brought to market efficiently while also safeguarding the public from cross-reactivity of novel proteins to known allergens. Bioinformatic assessments can help to identify proteins warranting further experimental checks for cross-reactivity. This study is a large-scale in silico evaluation of assessment criteria, including searches for: alignments between a query and an allergen having ≥ 35% identity over a length ≥ 80; any sequence (of some minimum length) found in both a query and an allergen; any alignment between a query and an allergen with an E-value below some threshold. The criteria and an allergen database (AllergenOnline) are used to assess 27,243 Viridiplantae proteins for potential allergenicity. (A protein is classed as a "real allergen" if it exceeds a test-specific level of identity to an AllergenOnline entry; assessment of real allergens in the query set is against a reduced database from which the identifying allergen has been removed.) Each criterion's ability to minimize false positives without increasing false negative levels of current methods is determined. At best, the data show a reduction in false positives to ∼6% (from ∼10% under current methods) without any increase in false negatives.
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Affiliation(s)
- Henry P Mirsky
- DuPont Pioneer, Route 141, Henry Clay Bldg, #400, Wilmington, DE 19880-0400, USA.
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49
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Myrset HR, Fæste CK, Kristiansen PE, Dooper MM. Mapping of the Immunodominant Regions of Shrimp Tropomyosin Pan b 1 by Human IgE-Binding and IgE Receptor Crosslinking Studies. Int Arch Allergy Immunol 2013; 162:25-38. [DOI: 10.1159/000350791] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Accepted: 03/15/2013] [Indexed: 11/19/2022] Open
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50
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Abramovitch JB, Kamath S, Varese N, Zubrinich C, Lopata AL, O'Hehir RE, Rolland JM. IgE Reactivity of Blue Swimmer Crab (Portunus pelagicus) Tropomyosin, Por p 1, and Other Allergens; Cross-Reactivity with Black Tiger Prawn and Effects of Heating. PLoS One 2013; 8:e67487. [PMID: 23840718 PMCID: PMC3686732 DOI: 10.1371/journal.pone.0067487] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2013] [Accepted: 05/19/2013] [Indexed: 01/31/2023] Open
Abstract
Shellfish allergy is a major cause of food-induced anaphylaxis, but the allergens are not well characterized. This study examined the effects of heating on blue swimmer crab (Portunus pelagicus) allergens in comparison with those of black tiger prawn (Penaeus monodon) by testing reactivity with shellfish-allergic subjects' serum IgE. Cooked extracts of both species showed markedly increased IgE reactivity by ELISA and immunoblotting, and clinical relevance of IgE reactivity was confirmed by basophil activation tests. Inhibition IgE ELISA and immunoblotting demonstrated cross-reactivity between the crab and prawn extracts, predominantly due to tropomyosin, but crab-specific IgE-reactivity was also observed. The major blue swimmer crab allergen tropomyosin, Por p 1, was cloned and sequenced, showing strong homology with tropomyosin of other crustacean species but also sequence variation within known and predicted linear IgE epitopes. These findings will advance more reliable diagnosis and management of potentially severe food allergy due to crustaceans.
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Affiliation(s)
- Jodie B. Abramovitch
- Department of Immunology, Monash University, Melbourne, Victoria, Australia
- Department of Allergy, Immunology and Respiratory Medicine, The Alfred Hospital and Monash University, Melbourne, Victoria, Australia
| | - Sandip Kamath
- School of Pharmacy and Molecular Science, James Cook University, Townsville, Queensland, Australia
| | - Nirupama Varese
- Department of Immunology, Monash University, Melbourne, Victoria, Australia
- Department of Allergy, Immunology and Respiratory Medicine, The Alfred Hospital and Monash University, Melbourne, Victoria, Australia
| | - Celia Zubrinich
- School of Pharmacy and Molecular Science, James Cook University, Townsville, Queensland, Australia
| | - Andreas L. Lopata
- School of Pharmacy and Molecular Science, James Cook University, Townsville, Queensland, Australia
| | - Robyn E. O'Hehir
- Department of Immunology, Monash University, Melbourne, Victoria, Australia
- Department of Allergy, Immunology and Respiratory Medicine, The Alfred Hospital and Monash University, Melbourne, Victoria, Australia
| | - Jennifer M. Rolland
- Department of Immunology, Monash University, Melbourne, Victoria, Australia
- Department of Allergy, Immunology and Respiratory Medicine, The Alfred Hospital and Monash University, Melbourne, Victoria, Australia
- * E-mail:
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