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Lin JF, Chang KL, Hsieh BS, Hu YC, Huang ES, Yu HS. Development of validated sandwich ELISA for detecting peanut allergen Ara h 3 in food. Food Chem 2024; 445:138757. [PMID: 38367563 DOI: 10.1016/j.foodchem.2024.138757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 02/01/2024] [Accepted: 02/13/2024] [Indexed: 02/19/2024]
Abstract
Peanut is an important food that can cause food allergies, often leading to moderate and severe allergic symptoms such as skin rashes, asthma, and even anaphylactic shock.Research indicates that Ara h 3 is one of the major peanut allergen. In order to establish a simple analytical method for detecting Ara h 3, we developed a sandwich enzyme-linked immunosorbent assay (ELISA) with antibodies that were induced from purified Ara h 3. The experimental results showed that the purified Ara h 3 had good purity, and we successfully prepared capture and detection antibodies. The method established in this study exhibited high specificity and did not cross-react with soybeans, cashew nuts, and sesame. For validation, including precision, recovery and sensitivity were in good condition. We also detected the Ara h 3 in peanut related foods. Overall, the ELISA developed in this study is a reliable method for Ara h 3 detection.
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Affiliation(s)
- Jia-Fong Lin
- Department of Food Science, National Pingtung University of Science and Technology, Pingtung 912, Taiwan.
| | - Kee-Lung Chang
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan; Department of Biochemistry, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan.
| | - Bau-Shan Hsieh
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan.
| | - Yu-Chen Hu
- Department of Biochemistry, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan.
| | - Edward S Huang
- Department of Gastroenterology, Palo Alto Medical Foundation, Mountain View, CA 94040, USA.
| | - Hsu-Sheng Yu
- Department of Food Science, National Pingtung University of Science and Technology, Pingtung 912, Taiwan.
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Tramuta C, Decastelli L, Ingravalle F, Barcucci E, Fragassi S, Bianchi DM. Performance Evaluation of a Commercial Real-Time PCR Method for the Detection of Lupin Traces in Food. Foods 2024; 13:609. [PMID: 38397586 PMCID: PMC10888417 DOI: 10.3390/foods13040609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 02/16/2024] [Accepted: 02/16/2024] [Indexed: 02/25/2024] Open
Abstract
In accordance with U.S. FDA Foods Program Regulatory Science Steering Committee guidelines, with this study, we optimized and validated a commercial real-time PCR method for the detection of low amounts of lupin in four classes of food matrices: chocolate cookies, ragù, Olivier salad, and barley and rice flour. DNA extracted from blank (true negative) samples artificially contaminated with lupin (Lupinus albus) flour at 1000 ppm underwent dilutions with the DNA extracted from the true negative samples up to 0.5 ppm. The limit of detection for real-time PCR was 0.5 ppm in the complex matrices (range, Ct 26-34), making this a specific, robust, and rapid method for lupin allergen detection and labeling. Our validation data support the suitability of this commercially available real-time PCR method for this purpose.
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Affiliation(s)
- Clara Tramuta
- Experimental Zooprophylactic Institute of Piedmont, Liguria and Valle d’Aosta, Italian National Reference Center for the Detection of Food Allergens and Substances Causing Food Intolerance (CReNaRiA), 10154 Turin, Italy; (L.D.); (E.B.); (S.F.); (D.M.B.)
| | - Lucia Decastelli
- Experimental Zooprophylactic Institute of Piedmont, Liguria and Valle d’Aosta, Italian National Reference Center for the Detection of Food Allergens and Substances Causing Food Intolerance (CReNaRiA), 10154 Turin, Italy; (L.D.); (E.B.); (S.F.); (D.M.B.)
| | - Francesco Ingravalle
- Experimental Zooprophylactic Institute of Piedmont, Liguria and Valle d’Aosta, Department Biostatistics, Epidemiology and Risk Analysis (BEAR), 10154 Turin, Italy;
| | - Elisa Barcucci
- Experimental Zooprophylactic Institute of Piedmont, Liguria and Valle d’Aosta, Italian National Reference Center for the Detection of Food Allergens and Substances Causing Food Intolerance (CReNaRiA), 10154 Turin, Italy; (L.D.); (E.B.); (S.F.); (D.M.B.)
| | - Sandra Fragassi
- Experimental Zooprophylactic Institute of Piedmont, Liguria and Valle d’Aosta, Italian National Reference Center for the Detection of Food Allergens and Substances Causing Food Intolerance (CReNaRiA), 10154 Turin, Italy; (L.D.); (E.B.); (S.F.); (D.M.B.)
| | - Daniela Manila Bianchi
- Experimental Zooprophylactic Institute of Piedmont, Liguria and Valle d’Aosta, Italian National Reference Center for the Detection of Food Allergens and Substances Causing Food Intolerance (CReNaRiA), 10154 Turin, Italy; (L.D.); (E.B.); (S.F.); (D.M.B.)
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Ballegaard ASR, Sancho AI, Zhou C, Knudsen NPH, Rigby NM, Bang-Berthelsen CH, Gupta S, Mackie AR, Lübeck M, Pilegaard K, Bøgh KL. Allergenicity evaluation of quinoa proteins - A study in Brown Norway rats. Food Chem Toxicol 2023; 182:114118. [PMID: 37863384 DOI: 10.1016/j.fct.2023.114118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Revised: 10/16/2023] [Accepted: 10/17/2023] [Indexed: 10/22/2023]
Abstract
The popularity of quinoa seeds has increased in the last decade due to their high nutritional value and natural gluten-free composition. Consumption of new proteins may pose a risk of introducing new allergies. In the present study the immunogenicity and sensitising capacity of quinoa proteins were assessed in a dose-response experiment in Brown Norway rats in comparison to proteins from spinach and peanut. Cross-reactivity between quinoa proteins and known allergens was evaluated by in silico analyses followed by analyses with 11 selected protein extracts and their anti-sera by means of ELISAs and immunoblotting. Further, an in vitro simulated gastro-duodenal digestion was performed. Quinoa proteins were found to have an inherent medium to high immunogenicity and sensitising capacity, being able to induce specific IgG1 and IgE levels higher than spinach but lower than peanut and elicit reactions of clinical relevance similar to peanut. Quinoa proteins were generally shown to resist digestion and retain capacity to bind quinoa-specific antibodies. Quinoa proteins were shown to be cross-reactive with peanut and tree nut allergens as high sequence homology and antibody cross-binding were demonstrated. Present study suggests that quinoa pose a medium to high level of allergenicity that should be further investigated in human studies.
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Affiliation(s)
- Anne-Sofie Ravn Ballegaard
- National Food Institute, Technical University of Denmark, Kemitorvet, Building 202, DK-2800, Kgs. Lyngby, Denmark
| | - Ana Isabel Sancho
- National Food Institute, Technical University of Denmark, Kemitorvet, Building 202, DK-2800, Kgs. Lyngby, Denmark
| | - Cui Zhou
- National Food Institute, Technical University of Denmark, Kemitorvet, Building 202, DK-2800, Kgs. Lyngby, Denmark
| | | | - Neil Marcus Rigby
- School of Food Science & Nutrition, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
| | - Claus Heiner Bang-Berthelsen
- National Food Institute, Technical University of Denmark, Kemitorvet, Building 202, DK-2800, Kgs. Lyngby, Denmark
| | - Shashank Gupta
- Immunology, ALK, Bøge Allé 1, DK-2970, Hørsholm, Denmark
| | - Alan Robert Mackie
- School of Food Science & Nutrition, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
| | - Mette Lübeck
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, DK-9100, Aalborg, Denmark
| | - Kirsten Pilegaard
- National Food Institute, Technical University of Denmark, Kemitorvet, Building 202, DK-2800, Kgs. Lyngby, Denmark
| | - Katrine Lindholm Bøgh
- National Food Institute, Technical University of Denmark, Kemitorvet, Building 202, DK-2800, Kgs. Lyngby, Denmark.
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Ivory K, Angotti R, Messina M, Bonente D, Paternostro F, Gulisano M, Nicoletti C. Alteration of Immunoregulatory Patterns and Survival Advantage of Key Cell Types in Food Allergic Children. Cells 2023; 12:2736. [PMID: 38067164 PMCID: PMC10706629 DOI: 10.3390/cells12232736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Revised: 11/15/2023] [Accepted: 11/28/2023] [Indexed: 12/18/2023] Open
Abstract
All allergic responses to food indicate the failure of immunological tolerance, but it is unclear why cow's milk and egg (CME) allergies resolve more readily than reactivity to peanuts (PN). We sought to identify differences between PN and CME allergies through constitutive immune status and responses to cognate and non-cognate food antigens. Children with confirmed allergy to CME (n = 6) and PN (n = 18) and non-allergic (NA) (n = 8) controls were studied. Constitutive secretion of cytokines was tested in plasma and unstimulated mononuclear cell (PBMNC) cultures. Blood dendritic cell (DC) subsets were analyzed alongside changes in phenotypes and soluble molecules in allergen-stimulated MNC cultures with or without cytokine neutralization. We observed that in allergic children, constitutively high plasma levels IL-1β, IL-2, IL-4, IL-5 and IL-10 but less IL-12p70 than in non-allergic children was accompanied by the spontaneous secretion of sCD23, IL-1β, IL-2, IL-4, IL-5, IL-10, IL-12p70, IFN-γ and TNF-α in MNC cultures. Furthermore, blood DC subset counts differed in food allergy. Antigen-presenting cell phenotypic abnormalities were accompanied by higher B and T cell percentages with more Bcl-2 within CD69+ subsets. Cells were generally refractory to antigenic stimulation in vitro, but IL-4 neutralization led to CD152 downregulation by CD4+ T cells from PN allergic children responding to PN allergens. Canonical discriminant analyses segregated non-allergic and allergic children by their cytokine secretion patterns, revealing differences and areas of overlap between PN and CME allergies. Despite an absence of recent allergen exposure, indication of in vivo activation, in vitro responses independent of challenging antigen and the presence of unusual costimulatory molecules suggest dysregulated immunity in food allergy. Most importantly, higher Bcl-2 content within key effector cells implies survival advantage with the potential to mount abnormal responses that may give rise to the manifestations of allergy. Here, we put forward the hypothesis that the lack of apoptosis of key immune cell types might be central to the development of food allergic reactions.
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Affiliation(s)
| | - Rossella Angotti
- Department of Medicine, Surgery and Neuroscience, University of Siena, 53100 Siena, Italy; (R.A.); (M.M.)
| | - Mario Messina
- Department of Medicine, Surgery and Neuroscience, University of Siena, 53100 Siena, Italy; (R.A.); (M.M.)
| | - Denise Bonente
- Department of Molecular and Developmental Medicine, University of Siena, 53100 Siena, Italy;
| | - Ferdinando Paternostro
- Department of Experimental and Clinical Medicine, University of Florence, 50134 Firenze, Italy; (F.P.); (M.G.)
| | - Massimo Gulisano
- Department of Experimental and Clinical Medicine, University of Florence, 50134 Firenze, Italy; (F.P.); (M.G.)
| | - Claudio Nicoletti
- Department of Molecular and Developmental Medicine, University of Siena, 53100 Siena, Italy;
- Department of Experimental and Clinical Medicine, University of Florence, 50134 Firenze, Italy; (F.P.); (M.G.)
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Baghersad A, Shams MH, Shahsavar F, Sohrabi SM, Varzi AM, Baharvand PA, Eskandari N, Darestani NG, Sereshki HA, Doosti F, Assarehzadegan MA. Immunochemical Characterization of Salix alba (S. alba) Pollen Allergens and Evaluation of the Cross-Reactivity Pattern with Common Allergenic Pollen Grains. Int Immunopharmacol 2023; 124:110953. [PMID: 37757632 DOI: 10.1016/j.intimp.2023.110953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 09/04/2023] [Accepted: 09/13/2023] [Indexed: 09/29/2023]
Abstract
BACKGROUND Pollens, particularly tree and plant pollens, are one of the major causes of allergic respiratory diseases worldwide. Allergy to pollens of different species of Salix trees has been reported in various regions of the world. The most common type of Salix tree in Iran is white willow (Salix alba). OBJECTIVES This study aimed to identify and determine the immunochemical characteristics of allergenic proteins in S. alba tree pollen extract using SDS-PAGE and IgE- immunoblotting methods. Moreover, the cross-reaction pattern of the specific IgE antibody of S. alba tree pollen proteins with pollen allergens of common allergenic trees, i.e., Populus nigra (P. nigra), Cupressus sempervirens (C. sempervirens), Pinus brutia (P. brutia) and Platanus orientalis (P. orientalis) in the region was investigated. METHODS The reaction of allergenic proteins in S. alba pollen extract with specific IgE antibodies in patients' sera was investigated using SDS-PAGE and IgE-immunoblotting methods. The cross-reaction of specific IgE antibodies of the proteins present in S. alba pollen extract with pollen allergens of common allergenic trees in the region was investigated using ELISA and immunoblotting inhibition methods. In silico methods such as phylogenetic tree drawing and alignment of amino acid sequences were used to examine the evolutionary relationship and homology structure of common allergenic proteins (Panallergens) responsible for cross reactions. RESULTS More than 11 protein bands binding to specific IgE antibodies in patients' sera with a molecular weight between 13 and 95 kDa were identified in the S. alba tree pollen extract. ELISA and immunoblotting inhibition results showed that P. nigra extract could inhibit the binding of IgE antibodies to S. alba pollen extract proteins to a greater extent than C. sempervirens, P. brutia, and P. orientalis tree extracts. In silico methods investigated the results of ELISA and immunoblotting inhibition methods. Moreover, a high structural homology and evolutionary relationship were observed between S. alba and P. nigra tree pollen panallergens. CONCLUSION In this study, it was found that more than 80 % of the sensitive patients who were examined had specific IgE antibodies reacting with the approximately a 15 kDa-protein present in the S. alba pollen extract. Furthermore, the specific IgE-binding proteins found in the pollens of S. alba and P. nigra trees had relative structural homology, and it is likely that if recombinant forms are produced, they can be used for diagnostic and therapeutic purposes for both of the trees.
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Affiliation(s)
- Ali Baghersad
- Hepatitis Research Center and Department of Medical Immunology, School of Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Mohammad Hossein Shams
- Hepatitis Research Center and Department of Medical Immunology, School of Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran.
| | - Farhad Shahsavar
- Hepatitis Research Center and Department of Medical Immunology, School of Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Seyyed Mohsen Sohrabi
- Department of Production Engineering and Plant Genetic, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Ali Mohammad Varzi
- Hepatitis Research Center and Department of Medical Immunology, School of Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Peyman Amanolahi Baharvand
- Hepatitis Research Center and Department of Medical Immunology, School of Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Nahid Eskandari
- Department of Immunology, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Nadia Ghasemi Darestani
- Department of Immunology, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Hale Abdoli Sereshki
- Immunology Research Center, Department of Immunology, school of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Fatemeh Doosti
- Immunology and Allergy Research Center, Pasteur Medical Diagnostic Laboratory, Ahvaz, Iran
| | - Mohammad-Ali Assarehzadegan
- Immunology Research Center, Department of Immunology, school of Medicine, Iran University of Medical Sciences, Tehran, Iran.
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Hu F, Ye Z, Dong K, Zhang W, Fang D, Cao J. Divergent structures and functions of the Cupin proteins in plants. Int J Biol Macromol 2023; 242:124791. [PMID: 37164139 DOI: 10.1016/j.ijbiomac.2023.124791] [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] [Received: 03/16/2023] [Revised: 05/03/2023] [Accepted: 05/05/2023] [Indexed: 05/12/2023]
Abstract
Cupin superfamily proteins have extensive functions. Their members are not only involved in the development of plants but also responded to various stresses. Whereas, the research on the Cupin members has not attracted enough attention. In this article, we summarized the research progress on these family genes in recent years and explored their evolution, structural characteristics, and biological functions. The significance of members of the Cupin family in the development of plant cell walls, roots, leaves, flowers, fruits, and seeds and their role in stress response are highlighted. Simultaneously, the prospective application of Cupin protein in crop enhancement was introduced. Some members can enhance plant growth, development, and resistance to adversity, thereby increasing crop yield. It will be as a foundation for future effective crop research and breeding.
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Affiliation(s)
- Fei Hu
- School of Life Sciences, Jiangsu University, Zhenjiang 212013, Jiangsu, China
| | - Ziyi Ye
- School of Life Sciences, Jiangsu University, Zhenjiang 212013, Jiangsu, China
| | - Kui Dong
- School of Life Sciences, Jiangsu University, Zhenjiang 212013, Jiangsu, China
| | - Weimeng Zhang
- School of Life Sciences, Jiangsu University, Zhenjiang 212013, Jiangsu, China
| | - Da Fang
- School of Life Sciences, Jiangsu University, Zhenjiang 212013, Jiangsu, China
| | - Jun Cao
- School of Life Sciences, Jiangsu University, Zhenjiang 212013, Jiangsu, China.
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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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8
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Jackson CM, Kaplan AN, Järvinen KM. Environmental Exposures may Hold the Key; Impact of Air Pollution, Greenness, and Rural/Farm Lifestyle on Allergic Outcomes. Curr Allergy Asthma Rep 2023; 23:77-91. [PMID: 36609951 PMCID: PMC9932951 DOI: 10.1007/s11882-022-01061-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/26/2022] [Indexed: 01/09/2023]
Abstract
PURPOSE OF REVIEW There has been an increased prevalence of allergy. Due to this relatively rapid rise, changes in environmental exposures are likely the main contributor. In this review, we highlight literature from the last 3 years pertaining to the role of air pollution, greenness, and the rural/farm lifestyle and their association with the development of allergic sensitization, atopic dermatitis, food allergy, and allergic rhinitis in infancy and childhood. Because asthma has a more complex pathophysiology, it was excluded from this review. RECENT FINDINGS Recent studies support a role for air pollution, greenness, and rural/farming lifestyle influencing atopic outcomes that continue to be defined. While many studies have examined singular environmental exposures, the interconnectedness of these exposures and others points to a need for future work to consider an individual's whole exposure. Environmental exposures' influence on atopic disease development remains an ongoing and important area of study.
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Affiliation(s)
- Courtney M Jackson
- Division of Allergy and Immunology, Center for Food Allergy, Department of Pediatrics, School of Medicine and Dentistry, University of Rochester, Golisano Children's Hospital, 601 Elmwood Ave. Box 777, Rochester, NY, 14642, USA
| | - Alexandra N Kaplan
- Division of Allergy and Immunology, Center for Food Allergy, Department of Pediatrics, School of Medicine and Dentistry, University of Rochester, Golisano Children's Hospital, 601 Elmwood Ave. Box 777, Rochester, NY, 14642, USA
| | - Kirsi M Järvinen
- Division of Allergy and Immunology, Center for Food Allergy, Department of Pediatrics, School of Medicine and Dentistry, University of Rochester, Golisano Children's Hospital, 601 Elmwood Ave. Box 777, Rochester, NY, 14642, USA.
- Division of Allergy, Immunology, and Rheumatology, Department of Medicine, School of Medicine and Dentistry, University of Rochester, 601 Elmwood Ave. Box 777, Rochester, NY, 14642, USA.
- Department of Microbiology and Immunology, School of Medicine and Dentistry, University of Rochester, 601 Elmwood Ave. Box 777, Rochester, NY, 14642, USA.
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Changes in Serum Protein-Peptide Patterns in Atopic Children Allergic to Plant Storage Proteins. Int J Mol Sci 2023; 24:ijms24021804. [PMID: 36675318 PMCID: PMC9861933 DOI: 10.3390/ijms24021804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 01/12/2023] [Indexed: 01/18/2023] Open
Abstract
Next to cow's milk and eggs, plant foods, i.e., legumes, tree nuts and cereal grains, most often sensitise atopic children. Storage proteins constitutes the most relevant protein fraction of plant foods, causing primary sensitisation. They exhibit strong allergenic properties and immunogenicity. Our goal was to analyse sensitisation to 26 plant storage proteins in a group of 76 children aged 0-5 years with chronic symptoms of atopic dermatitis using Allergy Explorer ALEX2 and to discover changes in serum protein-peptide patterns in allergic patients with the use of MALDI-TOF-MS. We reported that 25% of children were allergic to 2S albumins, 19.7% to 7S globulins, 13.2% to 11S globulins and 1.3% to cereal prolamins. The most common allergenic molecules were Ara h 1 (18.4%), Ara h 2 (17.1%), Ara h 6 (15.8%) and Ara h 3 (11.8%) from peanuts, and the mean serum sIgE concentrations in allergic patients were 10.93 kUA/L, 15.353 kUA/L, 15.359 kUA/L and 9.038 kUA/L, respectively. In children allergic to storage proteins compared to the other patients (both allergic and non-allergic), the cell cycle control protein 50A, testis-expressed sequence 13B, DENN domain-containing protein 5A and SKI family transcriptional corepressor 2 were altered. Our results indicate that the IgE-mediated allergy to storage proteins is a huge problem in a group of young, atopic children, and show the potential of proteomic analysis in the prediction of primary sensitisation to plant foods. It is the next crucial step for understanding the molecular consequences of allergy to storage proteins.
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Immunomodulatory and Allergenic Properties of Antimicrobial Peptides. Int J Mol Sci 2022; 23:ijms23052499. [PMID: 35269641 PMCID: PMC8910669 DOI: 10.3390/ijms23052499] [Citation(s) in RCA: 41] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 02/20/2022] [Accepted: 02/22/2022] [Indexed: 02/06/2023] Open
Abstract
With the growing problem of the emergence of antibiotic-resistant bacteria, the search for alternative ways to combat bacterial infections is extremely urgent. While analyzing the effect of antimicrobial peptides (AMPs) on immunocompetent cells, their effect on all parts of the immune system, and on humoral and cellular immunity, is revealed. AMPs have direct effects on neutrophils, monocytes, dendritic cells, T-lymphocytes, and mast cells, participating in innate immunity. They act on B-lymphocytes indirectly, enhancing the induction of antigen-specific immunity, which ultimately leads to the activation of adaptive immunity. The adjuvant activity of AMPs in relation to bacterial and viral antigens was the reason for their inclusion in vaccines and made it possible to formulate the concept of a “defensin vaccine” as an innovative basis for constructing vaccines. The immunomodulatory function of AMPs involves their influence on cells in the nearest microenvironment, recruitment and activation of other cells, supporting the response to pathogenic microorganisms and completing the inflammatory process, thus exhibiting a systemic effect. For the successful use of AMPs in medical practice, it is necessary to study their immunomodulatory activity in detail, taking into account their pleiotropy. The degree of maturity of the immune system and microenvironment can contribute to the prevention of complications and increase the effectiveness of therapy, since AMPs can suppress inflammation in some circumstances, but aggravate the response and damage of organism in others. It should also be taken into account that the real functions of one or another AMP depend on the types of total regulatory effects on the target cell, and not only on properties of an individual peptide. A wide spectrum of biological activity, including direct effects on pathogens, inactivation of bacterial toxins and influence on immunocompetent cells, has attracted the attention of researchers, however, the cytostatic activity of AMPs against normal cells, as well as their allergenic properties and low stability to host proteases, are serious limitations for the medical use of AMPs. In this connection, the tasks of searching for compounds that selectively affect the target and development of an appropriate method of application become critically important. The scope of this review is to summarize the current concepts and newest advances in research of the immunomodulatory activity of natural and synthetic AMPs, and to examine the prospects and limitations of their medical use.
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Peters RL, Sutherland D, Dharmage SC, Lowe AJ, Perrett KP, Tang MLK, Lycett K, Knibbs LD, Koplin JJ, Mavoa S. The association between environmental greenness and the risk of food allergy: A population-based study in Melbourne, Australia. Pediatr Allergy Immunol 2022; 33:e13749. [PMID: 35212044 DOI: 10.1111/pai.13749] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 02/02/2022] [Accepted: 02/04/2022] [Indexed: 02/06/2023]
Abstract
BACKGROUND While exposure to environmental greenness in childhood has shown mixed associations with the development of allergic disease, the relationship with food allergy has not been explored. We investigated the association between exposure to environmental greenness and challenge-confirmed food allergy in a large population-based cohort. METHODS The HealthNuts study recruited 5276 12-month-old infants in Melbourne, Australia, who underwent skin prick testing to peanut, egg, and sesame; infants with a detectable wheal underwent food challenges to determine food allergy status. Environmental greenness was estimated using the normalized difference vegetation index (NDVI) for five buffer zones around the infant's home address: at the home, 100 m, 500 m, 800 m, and 1600 m radial distances. Environmental greenness was categorized into 3 tertiles and mixed effects logistic regression models quantified the association between greenness and the risk of food allergy, adjusting for confounding and accounting for clustering at the neighborhood level. RESULTS NDVI data were available for n = 5097. For most buffer zones, medium and high greenness, compared to low greenness, was associated with an increased risk of peanut allergy (eg, 100 m tertile 2 aOR 1.89 95% CI 1.22-2.95, tertile 3 aOR 1.78 95% CI 1.13-2.82). For egg allergy, the effect sizes were smaller (100 m tertile 2 aOR 1.52 95% CI 1.16-1.97, tertile 3 aOR 1.38 95% CI 1.05-1.82). Socioeconomic status (SES) modified the association between greenness and peanut allergy, but not egg allergy; associations were apparent in the low SES group but not in the high SES group (p for interaction 0.08 at 100 m). Air pollution (PM2.5) also modified the associations between environmental greenness and food allergy, with associations present in high air pollution areas but not low (p for interaction at 100 m 0.05 for peanut and 0.06 for egg allergy.) CONCLUSION: Increased exposure to environmental greenness in the first year of life was associated with an increased risk of food allergy. Increased greenness may correlate with higher pollen levels which may trigger innate immune responses skewing the immune system to the Th2-dependent allergic phenotype; additionally, some pollen and food allergens are cross-reactive. Given the mixed data on greenness and other allergies, the relationship appears complex and may also be influenced by confounding variables outside those that were measured in this study.
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Affiliation(s)
- Rachel L Peters
- Murdoch Children's Research Institute, Parkville, Australia.,Department of Paediatrics, University of Melbourne, Parkville, Australia
| | - David Sutherland
- Murdoch Children's Research Institute, Parkville, Australia.,Melbourne School of Population and Global Health, University of Melbourne, Parkville, Australia
| | - Shyamali C Dharmage
- Murdoch Children's Research Institute, Parkville, Australia.,Melbourne School of Population and Global Health, University of Melbourne, Parkville, Australia
| | - Adrian J Lowe
- Murdoch Children's Research Institute, Parkville, Australia.,Melbourne School of Population and Global Health, University of Melbourne, Parkville, Australia
| | - Kirsten P Perrett
- Murdoch Children's Research Institute, Parkville, Australia.,Department of Paediatrics, University of Melbourne, Parkville, Australia.,Department of Allergy and Immunology, Royal Children's Hospital, Parkville, Australia
| | - Mimi L K Tang
- Murdoch Children's Research Institute, Parkville, Australia.,Department of Paediatrics, University of Melbourne, Parkville, Australia.,Department of Allergy and Immunology, Royal Children's Hospital, Parkville, Australia
| | - Kate Lycett
- Murdoch Children's Research Institute, Parkville, Australia.,Department of Paediatrics, University of Melbourne, Parkville, Australia.,School of Psychology, Deakin University, Burwood, Australia
| | - Luke D Knibbs
- Sydney School of Public Health, Faculty of Medicine and Health, The University of Sydney, Sydney, Australia
| | - Jennifer J Koplin
- Murdoch Children's Research Institute, Parkville, Australia.,Melbourne School of Population and Global Health, University of Melbourne, Parkville, Australia
| | - Suzanne Mavoa
- Murdoch Children's Research Institute, Parkville, Australia.,Melbourne School of Population and Global Health, University of Melbourne, Parkville, Australia
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12
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Peters RL, Mavoa S, Koplin JJ. An Overview of Environmental Risk Factors for Food Allergy. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19020722. [PMID: 35055544 PMCID: PMC8776075 DOI: 10.3390/ijerph19020722] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 12/20/2021] [Accepted: 12/21/2021] [Indexed: 11/16/2022]
Abstract
IgE-mediated food allergy is an increasing public health concern in many regions around the world. Although genetics play a role in the development of food allergy, the reported increase has occurred largely within a single generation and therefore it is unlikely that this can be accounted for by changes in the human genome. Environmental factors must play a key role. While there is strong evidence to support the early introduction of allergenic solids to prevent food allergy, this is unlikely to be sufficient to prevent all food allergy. The purpose of this review is to summarize the evidence on risk factors for food allergy with a focus the outdoor physical environment. We discuss emerging evidence of mechanisms that could explain a role for vitamin D, air pollution, environmental greenness, and pollen exposure in the development of food allergy. We also describe the recent extension of the dual allergen exposure hypothesis to potentially include the respiratory epithelial barrier in addition to the skin. Few existing studies have examined the relationship between these environmental factors with objective measures of IgE-mediated food allergy and further research in this area is needed. Future research also needs to consider the complex interplay between multiple environmental factors.
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Affiliation(s)
- Rachel L. Peters
- Murdoch Children’s Research Institute, Parkville 3052, Australia; (S.M.); (J.J.K.)
- Department of Paediatrics, University of Melbourne, Parkville 3052, Australia
- Correspondence:
| | - Suzanne Mavoa
- Murdoch Children’s Research Institute, Parkville 3052, Australia; (S.M.); (J.J.K.)
- Melbourne School of Population and Global Health, University of Melbourne, Parkville 3052, Australia
| | - Jennifer J. Koplin
- Murdoch Children’s Research Institute, Parkville 3052, Australia; (S.M.); (J.J.K.)
- Department of Paediatrics, University of Melbourne, Parkville 3052, Australia
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13
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Kim D, Jin B, Kim SA, Choi W, Shin S, Park J, Shim WB, Kim K, Lee JS. An Ultrasensitive Silicon-Based Electrolyte-Gated Transistor for the Detection of Peanut Allergens. BIOSENSORS 2022; 12:bios12010024. [PMID: 35049652 PMCID: PMC8773534 DOI: 10.3390/bios12010024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 12/31/2021] [Accepted: 12/31/2021] [Indexed: 11/28/2022]
Abstract
The highly sensitive detection of peanut allergens (PAs) using silicon-based electrolyte-gated transistors (Si-EGTs) was demonstrated. The Si-EGT was made using a top-down technique. The fabricated Si-EGT showed excellent intrinsic electrical characteristics, including a low threshold voltage of 0.7 V, low subthreshold swing of <70 mV/dec, and low gate leakage of <10 pA. Surface functionalization and immobilization of antibodies were performed for the selective detection of PAs. The voltage-related sensitivity (SV) showed a constant behavior from the subthreshold regime to the linear regime. The current-related sensitivity (SI) was high in the subthreshold regime and then significantly decreased as the drain current increased. The limit of detection (LOD) was calculated to be as low as 25 pg/mL based on SI characteristics, which is the lowest value reported to date in the literature for various sensor methodologies. The Si-EGT showed selective detection of PA through a non-specific control test. These results confirm that Si-EGT is a high-sensitivity and low-power biosensor for PA detection.
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Affiliation(s)
- Donghoon Kim
- Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea; (D.K.); (B.J.); (W.C.); (S.S.); (J.P.)
| | - Bo Jin
- Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea; (D.K.); (B.J.); (W.C.); (S.S.); (J.P.)
- Research and Development Department, Innovative General Electronic Sensor Technology Co., Itd. (IGEST), Pohang 37673, Korea
| | - Sol-A Kim
- Division of Applied Life Science, Graduate School, Gyeongsang National University, Jinju 52828, Korea;
| | - Wonyeong Choi
- Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea; (D.K.); (B.J.); (W.C.); (S.S.); (J.P.)
| | - Seonghwan Shin
- Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea; (D.K.); (B.J.); (W.C.); (S.S.); (J.P.)
| | - Jiwon Park
- Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea; (D.K.); (B.J.); (W.C.); (S.S.); (J.P.)
| | - Won-Bo Shim
- Department of Food Science and Technology, Gyeongsang National University, Jinju 52828, Korea;
| | - Kihyun Kim
- Division of Electronics Engineering, Jeonbuk National University, Jeonju 54896, Korea
- Future Semiconductor Convergence Technology Research Center and ICT Convergence Research Center, Jeonbuk National University, Jeonju 54896, Korea
- Correspondence: (K.K.); (J.-S.L.)
| | - Jeong-Soo Lee
- Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea; (D.K.); (B.J.); (W.C.); (S.S.); (J.P.)
- Correspondence: (K.K.); (J.-S.L.)
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14
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Beer and Allergens. BEVERAGES 2021. [DOI: 10.3390/beverages7040079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Food allergies are an important global health concern, with many countries following the World Health Organisation’s guidelines with regards to due labelling of foods and, as such, providing forewarning about the presence of potential allergens to potential consumers. While for some produce, the link to specific allergens might be very clear to most consumers, this is not the case for all produce. People with specific food-related allergies usually know what to look out for, but occasionally, unexpected allergens are present in trusted produce. Beer is known to most to contain barley, which will contain gluten-like proteins that can cause allergic reactions in some people. Similarly, beer might contain sulphites and other potential allergens traditionally associated with beers. This review aims to examine a wide range of allergens that have entered the beer production process in recent years. As a result, examples of beers that contain one or more of the 14 EU-UK listed allergens are described, different allergen regulations in different countries are emphasised and their impact explained, and a number of case studies involving allergic reactions following exposure to and the ingestion of beer are highlighted.
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15
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Aptamer-Based Fluorescent Biosensor for the Rapid and Sensitive Detection of Allergens in Food Matrices. Foods 2021; 10:foods10112598. [PMID: 34828878 PMCID: PMC8623274 DOI: 10.3390/foods10112598] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 10/20/2021] [Accepted: 10/22/2021] [Indexed: 02/07/2023] Open
Abstract
Food allergies have seriously affected the life quality of some people and even endangered their lives. At present, there is still no effective cure for food allergies. Avoiding the intake of allergenic food is still the most effective way to prevent allergic diseases. Therefore, it is necessary to develop rapid, accurate, sensitive, and reliable analysis methods to detect food allergens from different sources. Aptamers are oligonucleotide sequences that can bind to a variety of targets with high specificity and selectivity, and they are often combined with different transduction technologies, thereby constructing various types of aptamer sensors. In recent years, with the development of technology and the application of new materials, the sensitivity, portability, and cost of fluorescence sensing technology have been greatly improved. Therefore, aptamer-based fluorescence sensing technology has been widely developed and applied in the specific recognition of food allergens. In this paper, the classification of major allergens and their characteristics in animal and plant foods were comprehensively reviewed, and the preparation principles and practical applications of aptamer-based fluorescence biosensors are summarized. In addition, we hope that this article can provide some strategies for the rapid and sensitive detection of allergens in food matrices.
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16
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Scala E, Caprini E, Abeni D, Meneguzzi G, Buzzulini F, Cecchi L, Villalta D, Asero R. A qualitative and quantitative comparison of IgE antibody profiles with two multiplex platforms for component-resolved diagnostics in allergic patients. Clin Exp Allergy 2021; 51:1603-1612. [PMID: 34523179 DOI: 10.1111/cea.14016] [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] [Received: 07/15/2021] [Revised: 06/03/2021] [Accepted: 09/08/2021] [Indexed: 12/24/2022]
Abstract
BACKGROUND Clinically complex phenotypes require more and more sophisticated and comprehensive diagnostic approaches, able to discriminate genuine sensitizations from cross-reactivity. Interpretative complexity of multiplex diagnostic arrays has somewhat limited their diffusion. This study compares two currently available methods, namely ISAC® test and ALEX2® test. METHODS In total, 140 allergic individuals, with a history of atopic dermatitis, adverse food reactions, allergic rhinitis and/or bronchial asthma were studied by Allergy Explorer-ALEX2® macroarray and ImmunoCAP ISAC112® . Lin's concordance correlation coefficient, intraclass correlation coefficient and Bland-Altman plots were used to verify the agreement between continuous values. Cohen's kappa coefficient (k) was assessed for the molecules available in both tests. The degree of relationship was analysed using Spearman's correlation (quantitative variables) and Pearson's χ2 or Fisher's exact test (categorical variables). RESULTS A substantial agreement (κ = 0.795) was observed between the two methods with 94,3% concordant results when results were dichotomized as negative or positive, but if double-negative results were discarded, the agreement dropped to 71%. Conversely, little or no concordance was observed comparing raw data. Considering the 102 molecules shared by both systems, 28/102 (27%) showed an almost perfect agreement (k > 0.81), and concordance was good (k > 0.61) in a further 32 (31%) cases. A perfect to substantial agreement was observed by comparing species-specific aeroallergens. Heterogeneous results emerged comparing panallergens (co-recognition ranging from 30% for tropomyosin/serum albumins to 70% for PR-10/profilin). The correlation among LTP, profilin and PR-10 assayed with ISAC® was better than ALEX2® , but the latter identified more positive cases due to the wider number of molecules available. The CCD blocker provided by ALEX® test abolishes the carbohydrate determinants signal in 60% of the 33 cases reactive to MUXF3 on the ISAC® test. CONCLUSION Despite the excellent concordance of the species-specific markers, the analysis of the panallergens provided in both methods suggests a better performance of the ISAC® test on those components, while the ALEX2® test, which includes a larger number of allergens, allowing a broader molecular detection.
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Affiliation(s)
- Enrico Scala
- Clinical and Laboratory Molecular Allergy Unit, IDI - IRCCS, Rome, Italy
| | - Elisabetta Caprini
- Clinical and Laboratory Molecular Allergy Unit, IDI - IRCCS, Rome, Italy
| | - Damiano Abeni
- Clinical and Laboratory Molecular Allergy Unit, IDI - IRCCS, Rome, Italy
| | - Giorgia Meneguzzi
- Clinical and Laboratory Molecular Allergy Unit, IDI - IRCCS, Rome, Italy
| | - Francesca Buzzulini
- Immunologia e allergologia, Ospedale S. Maria degli Angeli, Pordenone, Italy
| | - Lorenzo Cecchi
- SOS Allergy and Clinical Immunology, USL Toscana Centro, Prato, Italy
| | - Danilo Villalta
- Immunologia e allergologia, Ospedale S. Maria degli Angeli, Pordenone, Italy
| | - Riccardo Asero
- Ambulatorio di allergologia, Clinica San Carlo, Paderno Dugnano, Italy
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17
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Johnson JL, Hawthorne A, Bounds M, Weldon DJ. New perspectives on propofol allergy. Am J Health Syst Pharm 2021; 78:2195-2203. [PMID: 34309659 DOI: 10.1093/ajhp/zxab298] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
PURPOSE Propofol is an intravenous sedative used in many patient populations and care settings. Although generally considered safe and effective, the drug has historically been avoided in patients with reported allergies to egg, soy, and/or peanut on the basis of the manufacturer's prescribing information. Concerns exist for potential adverse events, increased medication costs, reduced efficacy, and risk of medication errors when using alternative agents. Here we present a critical examination of the literature concerning cross-reactivity of food allergies with propofol to provide evidence-based recommendations for the evaluation and management of potential allergic reactions. SUMMARY Literature regarding the history of propofol allergy warnings and clinical trial data were assessed to provide an alternative perspective on avoidance of propofol in patients with food allergies. Suspected trigger molecules are discussed with evaluation of the antigenic potential of excipient ingredients used in the manufacture of multiple propofol formulations. Evidence-based recommendations are provided for pharmacist-led screening of adult patients with reported food allergies to support selection of propofol or alternative therapy. CONCLUSION There is a lack of definitive evidence that propofol must be routinely avoided in patients with reported allergies to egg, soy, and/or peanut products. Data from clinical trials suggest that propofol is safe for patients with nonanaphylactic food allergies. Patients who do experience allergic reactions following administration of propofol should undergo further testing to definitively identify the specific trigger and prevent future unnecessary avoidance of preferred medication regimens. Pharmacists can play an important role in interviewing patients with reported food allergies to better determine the risk vs benefit of propofol avoidance.
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Affiliation(s)
| | | | - Michael Bounds
- William Carey University School of Pharmacy, Biloxi, MS, USA
| | - David J Weldon
- William Carey University School of Pharmacy, Biloxi, MS, USA
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18
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Freitas M, Neves MMPS, Nouws HPA, Delerue-Matos C. Electrochemical Immunosensor for the Simultaneous Determination of Two Main Peanut Allergenic Proteins (Ara h 1 and Ara h 6) in Food Matrices. Foods 2021; 10:1718. [PMID: 34441496 PMCID: PMC8391283 DOI: 10.3390/foods10081718] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 07/19/2021] [Accepted: 07/20/2021] [Indexed: 01/22/2023] Open
Abstract
Efficiently detecting peanut traces in food products can prevent severe allergic reactions and serious health implications. This work presents the development of an electrochemical dual immunosensor for the simultaneous analysis of two major peanut allergens, Ara h 1 and Ara h 6, in food matrices. A sandwich immunoassay was performed on a dual working screen-printed carbon electrode using monoclonal antibodies. The antibody-antigen interaction was detected by linear sweep voltammetry through the oxidation of enzymatically deposited silver, which was formed by using detection antibodies labeled with alkaline phosphatase and a 3-indoxyl phosphate/silver nitrate mixture as the enzymatic substrate. The assay time was 2 h 20 min, with a hands-on time of 30 min, and precise results and low limits of detection were obtained (Ara h 1: 5.2 ng·mL-1; Ara h 6: 0.017 ng·mL-1). The selectivity of the method was confirmed through the analysis of other food allergens and ingredients (e.g., hazelnut, soybean and lupin). The dual sensor was successfully applied to the analysis of several food products and was able to quantify the presence of peanuts down to 0.05% (w/w). The accuracy of the results was confirmed through recovery studies and by comparison with an enzyme-linked immunosorbent assay. Tracking food allergens is of utmost importance and can be performed using the present biosensor in a suitable and practical way.
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Affiliation(s)
- Maria Freitas
- REQUIMTE/LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 431, 4200-072 Porto, Portugal; (M.F.); (M.M.P.S.N.); (C.D.-M.)
| | - Marta M. P. S. Neves
- REQUIMTE/LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 431, 4200-072 Porto, Portugal; (M.F.); (M.M.P.S.N.); (C.D.-M.)
- Department of Chemistry, Institute of Advanced Study, University of Warwick, Coventry CV4 7AL, UK
| | - Henri P. A. Nouws
- REQUIMTE/LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 431, 4200-072 Porto, Portugal; (M.F.); (M.M.P.S.N.); (C.D.-M.)
| | - Cristina Delerue-Matos
- REQUIMTE/LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 431, 4200-072 Porto, Portugal; (M.F.); (M.M.P.S.N.); (C.D.-M.)
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19
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Maruyama N. Components of plant-derived food allergens: Structure, diagnostics, and immunotherapy. Allergol Int 2021; 70:291-302. [PMID: 34092500 DOI: 10.1016/j.alit.2021.05.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 04/19/2021] [Indexed: 12/11/2022] Open
Abstract
A large number of plant-derived food allergen components have been identified to date. Although these allergens are diverse, they often share common structural features such as numerous disulfide bonds or oligomeric structures. Furthermore, some plant-derived food allergen components cross-react with pollen allergens. Since the relationship between allergen components and clinical symptoms has been well characterized, measurements of specific IgE to these components have become useful for the accurate clinical diagnosis and selection of optimal treatment methods for various allergy-related conditions including allergy caused by plant-derived foods. Herein, I have described the types and structures of different plant allergen components and outlined the diagnosis as well as treatment strategies, including those reported recently, for such substances. Furthermore, I have also highlighted the contribution of allergen components to this field.
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Affiliation(s)
- Nobuyuki Maruyama
- Food Quality Design and Development Laboratory, Graduate School of Agriculture, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan.
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20
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Čelakovská J, Bukač J, Vaňková R, Krejsek J, Andrýs C. Peanuts allergy in atopic dermatitis patients, analysis of sensitization to molecular components. FOOD AGR IMMUNOL 2021. [DOI: 10.1080/09540105.2021.1911958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Affiliation(s)
- J. Čelakovská
- Department of Dermatology and Venereology, Faculty Hospital and Medical Faculty of Charles University, Hradec Králové, Czech Republic
| | - J. Bukač
- Department of Medical Biophysic, Medical Faculty of Charles University, Hradec Králové, Czech Republic
| | - R. Vaňková
- Department of Clinical Immunology and Allergy, Faculty Hospital and Medical Faculty of Charles University, Hradec Králové, Czech Republic
| | - J. Krejsek
- Department of Clinical Immunology and Allergy, Faculty Hospital and Medical Faculty of Charles University, Hradec Králové, Czech Republic
| | - C. Andrýs
- Department of Clinical Immunology and Allergy, Faculty Hospital and Medical Faculty of Charles University, Hradec Králové, Czech Republic
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21
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Villemet L, Cuchet A, Desvignes C, Sänger-van de Griend CE. Protein mapping of peanut extract with capillary electrophoresis. Electrophoresis 2021; 43:1027-1034. [PMID: 33970506 DOI: 10.1002/elps.202100004] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 04/29/2021] [Accepted: 04/29/2021] [Indexed: 11/07/2022]
Abstract
Protein separation can be achieved with different modes of capillary electrophoresis, such as with capillary gel electroporesis (CGE) or with capillary zone electrophoresis (CZE). CZE protein mapping of peanut extract was approached in four different ways, combining neutral-coated or multilayer-coated capillaries with pHs well over or under the isoelectric point range of the proteins of interest. At acidic pHs, the mobility ranges of the major peanut allergens Ara h1, Ara h2, Ara h3, and Ara h6 were identified. Although the pH is a major factor in CZE separation, buffers with different compositions but with the same pH and ionic strength showed significantly different resolutions. Different components of the electrolyte were studied in a multifactorial design of experiment. CE-SDS and CZE proved to be suitable for protein mapping and we were able to distinguish different batches of peanut extract and burned peanut extract.
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Affiliation(s)
| | | | | | - Cari E Sänger-van de Griend
- Kantisto BV, Baarn, The Netherlands.,Faculty of Pharmacy, Department of Medicinal Chemistry, Uppsala University, Uppsala, Sweden
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22
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Beitia JM, Vega Castro A, Cárdenas R, Peña-Arellano MI. Pru p 3 Sublingual Immunotherapy in Patients with Lipid Transfer Protein Syndrome: Is It Worth? Int Arch Allergy Immunol 2021; 182:447-454. [PMID: 33588417 DOI: 10.1159/000512613] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Accepted: 10/27/2020] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Lipid transfer proteins (LTPs) syndrome is an important cause of multiple plant food allergy in the Mediterranean area. The effectiveness of sublingual immunotherapy (SLIT) with the LTP Pru p 3 extract has been little investigated in the real-world setting. This study aimed to investigate the outcome of Pru p 3 SLIT in real-life patients with LTP syndrome with/without concurrent reactions to peanut and/or nuts. METHODS This was a prospective real-life study including all patients diagnosed with LTP allergy and treated with Pru p 3 SLIT between 2011 and 2018 in a tertiary hospital in Spain. Patients underwent open oral food challenge (OFC) tests for unpeeled peach and nuts/peanuts 1 year after the treatment started to assess food tolerance. A control group of patients diagnosed with LTP allergy who refused treatment with immunotherapy were included. Severity of symptoms and diet avoidance was recorded in both groups. RESULTS Twenty-nine patients with a median age of 24.7 years (range 5.5-43.1) were included: 100% were allergic to fruit; 72%, to peanut and/or nuts; 19 had a history of severe systemic reactions. Seven patients discontinued therapy; 3 (10%), due to adverse events. One year after SLIT start, 16 (73%) patients had negative OFC to peach; 95%, after 2 years; 69% had negative OFC to nuts/peanuts. The control group included 13 patients: 53.8% experienced reactions with new foods; severity of symptoms increased significantly (p < 0.001), and diet restrictions were maintained in this group. CONCLUSIONS SLIT with Pru p 3 shows a good safety profile, and avoid dietary restrictions in patients with LTP syndrome treated in the real-life setting.
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Affiliation(s)
- Juan María Beitia
- Allergy Service, Hospital Universitario de Guadalajara, Guadalajara, Spain.,ARADyAL Spanish Thematic Network and Co-operative Research Centre RD16/0006/0023, Spain
| | - Arantza Vega Castro
- Allergy Service, Hospital Universitario de Guadalajara, Guadalajara, Spain, .,ARADyAL Spanish Thematic Network and Co-operative Research Centre RD16/0006/0023, Spain,
| | - Remedios Cárdenas
- Allergy Service, Hospital Universitario de Guadalajara, Guadalajara, Spain.,ARADyAL Spanish Thematic Network and Co-operative Research Centre RD16/0006/0023, Spain
| | - Maria Isabel Peña-Arellano
- Allergy Service, Hospital Universitario de Guadalajara, Guadalajara, Spain.,ARADyAL Spanish Thematic Network and Co-operative Research Centre RD16/0006/0023, Spain
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Saha B, Karmakar B, Bhattacharya SG. Cloning, expression and immunological characterisation of Coc n 1, the first major allergen from Coconut pollen. Mol Immunol 2021; 131:33-43. [PMID: 33486354 DOI: 10.1016/j.molimm.2020.12.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 11/19/2020] [Accepted: 12/16/2020] [Indexed: 12/24/2022]
Abstract
Coconut pollen has been documented to be a major contributor to the aeroallergen load in India, causing respiratory allergy in a large cohort of susceptible individuals. Here, we report the identification of the first major allergen from Coconut pollen, Coc n 1. The full-length sequence of the allergen was determined from previously identified peptides and overexpressed in E. coli. Recombinant Coc n 1 folded into a trimer and was found to possess allergenicity equivalent to its natural counterpart. Proteolytic processing of Coc n 1 led to the formation of an immunodominant ∼20 kDa C-terminal subunit and the site of cleavage was determined by amino acid microsequencing. Five linear IgE binding epitopes were predicted and mapped on the homology modelled structure of Coc n 1. Amongst three immunodominant epitopes, two were present towards the C-terminal end. Coc n 1 was found to belong to the highly diverse cupin superfamily and mimics its structure with known 7S globulin or vicilin allergens but lacks sequence similarity. Using sequence similarity networks, Coc n 1 clustered as a separate group containing unannotated cupin domain proteins and did not include known vicilin allergens except Gly m Bd 28 kDa, a Soybean major allergen. 7S globulins are major storage proteins and food allergens, but presence of such protein in pollen grains is reported for the first time. Further study on Coc n 1 may provide insights into its function in pollen grains and also in the development of immunotherapy to Coconut pollen allergy.
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Affiliation(s)
- Bodhisattwa Saha
- Division of Plant Biology, Bose Institute, 93/1, Acharya Prafulla Chandra Road, Kolkata 700009, India; Chemistry Research Laboratory, 12 Mansfield Road, OX4 4TG, Oxford, United Kingdom.
| | - Bijoya Karmakar
- Division of Plant Biology, Bose Institute, 93/1, Acharya Prafulla Chandra Road, Kolkata 700009, India
| | - Swati Gupta Bhattacharya
- Division of Plant Biology, Bose Institute, 93/1, Acharya Prafulla Chandra Road, Kolkata 700009, India.
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24
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Gamella M, Bueno-Díaz C, Ruiz-Valdepeñas Montiel V, Povedano E, Reviejo AJ, Villalba M, Campuzano S, Pingarrón JM. First electrochemical immunosensor for the rapid detection of mustard seeds in plant food extracts. Talanta 2020; 219:121247. [PMID: 32887138 DOI: 10.1016/j.talanta.2020.121247] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 05/28/2020] [Accepted: 05/31/2020] [Indexed: 01/05/2023]
Abstract
This paper describes the first biosensor reported to date for the determination of mustard seed traces. The biosensor consists of an amperometric immunosensing platform able to sensitively and selectively determine Sin a 1 content, the major allergen of yellow mustard and the most abundant protein of these seeds. The immunosensing platform exploits the coupling of magnetic microbeads (MBs) modified with sandwich-type immune complexes, comprising polyclonal and monoclonal antibodies, selective to the target protein for its capturing and detection, respectively. In addition, a HRP-conjugated secondary antibody was used for enzymatic labelling of the monoclonal antibody, and amperometric transduction was made at screen-printed carbon electrodes (SPCEs) using the hydroquinone (HQ)/H2O2 system. The electrochemical immunosensor allows the simple and fast detection (a single 1-h incubation step) of Sin a 1 with a limit of detection of 0.82 ng mL-1 (20.5 pg of protein in 25 μL of sample) with high selectivity against structurally similar non-target allergenic proteins (such as Pin p 1 from pine nut). The developed immunoplatform was successfully used for the analysis of peanut, rapeseed, cashew, pine nut and yellow mustard extracts, giving only positive response for the yellow mustard extract with a Sin a 1 content, in full agreement with that provided by conventional ELISA methodology.
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Affiliation(s)
- M Gamella
- Departamento de Química Analítica, Facultad de CC. Químicas, Universidad Complutense de Madrid, E-28040, Madrid, Spain
| | - C Bueno-Díaz
- Departamento de Bioquímica y Biología Molecular Facultad de Ciencias Químicas, Universidad Complutense de Madrid, E-28040, Madrid, Spain
| | - V Ruiz-Valdepeñas Montiel
- Departamento de Química Analítica, Facultad de CC. Químicas, Universidad Complutense de Madrid, E-28040, Madrid, Spain
| | - E Povedano
- Departamento de Química Analítica, Facultad de CC. Químicas, Universidad Complutense de Madrid, E-28040, Madrid, Spain
| | - A J Reviejo
- Departamento de Química Analítica, Facultad de CC. Químicas, Universidad Complutense de Madrid, E-28040, Madrid, Spain
| | - M Villalba
- Departamento de Bioquímica y Biología Molecular Facultad de Ciencias Químicas, Universidad Complutense de Madrid, E-28040, Madrid, Spain.
| | - S Campuzano
- Departamento de Química Analítica, Facultad de CC. Químicas, Universidad Complutense de Madrid, E-28040, Madrid, Spain.
| | - J M Pingarrón
- Departamento de Química Analítica, Facultad de CC. Químicas, Universidad Complutense de Madrid, E-28040, Madrid, Spain.
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25
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Pitre M, L’Hocine L, Achouri A, Blaquière M, Des Roches A. Immunoglobulin E-Binding Pattern of Canadian Peanut Allergic Children and Cross-Reactivity with Almond, Hazelnut and Pistachio. Biomolecules 2020; 10:E1091. [PMID: 32707944 PMCID: PMC7464554 DOI: 10.3390/biom10081091] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 07/17/2020] [Accepted: 07/20/2020] [Indexed: 12/24/2022] Open
Abstract
Peanut allergic individuals can be both co-sensitized and co-allergic to peanut and tree nuts. At the moment, standard diagnostic approaches do not always allow differentiation between clinically relevant sensitization and nonsignificant cross-reactions, and the responsibility of each allergen remains unclear. The objective of this study was therefore to determine a peanut sensitization profile in a cohort of Canadian peanut allergic children and assess the immunoglobulin E (IgE) molecular cross-reactivity between peanut, almond, hazelnut and pistachio. The specific IgE (sIgE) levels of each patient serum were determined by ImmunoCAP, indirect ELISA and immunoblot to examine their sIgE-binding levels and profiles to peanut proteins. Reciprocal inhibition ELISA and immunoblotting were used to study sIgE cross-reactions between peanut and the selected tree nuts using an adjusted and representative serum pool of the nine allergic patients. The results showed that the prepared peanut and tree nut protein extracts allowed for the detection of the majority of peanut and selected tree nut known allergens. The reciprocal inhibition ELISA experiments showed limited sIgE cross-reactivities between peanut and the studied tree nuts, with peanut being most likely the sensitizing allergen and tree nuts the cross-reactive ones. In the case of hazelnut and pistachio, a coexisting primary sensitization to hazelnut and pistachio was also demonstrated in the serum pool. Reciprocal inhibition immunoblotting further revealed that storage proteins (2S albumin, 7S vicilin and 11S legumin) could possibly account for the observed IgE-cross-reactions between peanut and the studied tree nuts in this cohort of allergic individuals. It also demonstrated the importance of conformational epitopes in the exhibited cross-reactions.
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Affiliation(s)
- Mélanie Pitre
- Saint-Hyacinthe Research and Development Centre, Agriculture and Agri-Food Canada, 3600 Casavant Blvd. W. Saint-Hyacinthe, QC J2S 8E3, Canada; (M.P.); (A.A.)
| | - Lamia L’Hocine
- Saint-Hyacinthe Research and Development Centre, Agriculture and Agri-Food Canada, 3600 Casavant Blvd. W. Saint-Hyacinthe, QC J2S 8E3, Canada; (M.P.); (A.A.)
| | - Allaoua Achouri
- Saint-Hyacinthe Research and Development Centre, Agriculture and Agri-Food Canada, 3600 Casavant Blvd. W. Saint-Hyacinthe, QC J2S 8E3, Canada; (M.P.); (A.A.)
| | - Martin Blaquière
- Sherbrooke University Hospital Center, Hôtel-Dieu de Sherbrooke, Department of Pediatrics, 580 Bowen south, Sherbrooke, QC J1G 2E3, Canada;
| | - Anne Des Roches
- Immunoallergy and Rheumatology Service Department of Pediatrics Medical School CHU Sainte-Justine Institution, 3175 Côte Sainte-Catherine, Montreal, QC H3T 1C5, Canada;
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26
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Frith K, Katelaris CH. Current perspectives on peanut allergy. Intern Med J 2020; 49:1480-1487. [PMID: 31808255 DOI: 10.1111/imj.14658] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 09/11/2019] [Accepted: 09/15/2019] [Indexed: 12/18/2022]
Abstract
Peanut allergy is increasingly prevalent and for most patients is a life-long condition, with the potential to cause life-threatening reactions. Accurate diagnosis and appropriate management are essential to minimise risks due to accidental peanut exposure. Current management strategies focus on strict allergen avoidance and access to emergency medicines to treat potential reactions; however, active approaches are an area of intense research. Promising new methods of food allergen immunotherapy are set to change the approach to managing peanut allergic patients in the near future.
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Affiliation(s)
- Katie Frith
- Department of Immunology and Infectious Diseases, Sydney Children's Hospital and University of New South Wales, Sydney, New South Wales, Australia
| | - Constance H Katelaris
- Department of Immunology, Campbelltown Hospital and Western Sydney University, Sydney, New South Wales, Australia
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27
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Nesbit JB, Schein CH, Braun BA, Gipson SAY, Cheng H, Hurlburt BK, Maleki SJ. Epitopes with similar physicochemical properties contribute to cross reactivity between peanut and tree nuts. Mol Immunol 2020; 122:223-231. [PMID: 32442779 DOI: 10.1016/j.molimm.2020.03.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 02/11/2020] [Accepted: 03/26/2020] [Indexed: 12/28/2022]
Abstract
Many individuals with peanut (PN) allergy have severe reactions to tree nuts (TN) such as walnuts or cashews. Although allergenic proteins in TN and PN have overall low identity, they share discrete sequences similar in physicochemical properties (PCP) to known IgE epitopes. Here, PCP-consensus peptides (cp, 13 aa and 31 aa) were identified from an alignment of epitope rich regions of walnut vicilin, Jug r 2, leader sequence (J2LS) and cross-reactive epitopes in the 2S albumins of peanut and synthesized. A peptide similarity search in the Structural Database of Allergenic Proteins (SDAP) revealed a network of peptides similar (low property distance, PD) to the 13 aa cp (13cp) in many different plant allergens. Peptides similar to the 13cp in PN and TN allergens bound IgE from sera of patients allergic to PN and TN in peptide microarray analysis. The 13cp was used to produce a rabbit consensus peptide antibody (cpAB) that detected proteins containing repeats similar to the 13cp in western blots of various nut extracts, in which reactive proteins were identified by mass spectrometry. The cpAB bound more specifically to allergens and nut extracts containing multiple repeats similar to the 13 cp, such as almond (Pru du 6), peanut (Ara h 2) and walnut (Jug r 2). IgE binding to various nut extracts is inhibited by recombinant J2LS sequence and synthetic 31cp. Thus, several repeated sequences similar to the 13cp are bound by IgE. Multiple similar repeats in several allergens could account for reaction severity and clinically relevant cross-reactivity to PN and TN. These findings may help improve detection, diagnostic, and therapeutic tools.
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Affiliation(s)
- Jacqueline B Nesbit
- Dept of Agriculture-Agricultural Research Service-Southern Regional Research Center (USDA-ARS-SRRC), New Orleans, LA, United States
| | - Catherine H Schein
- Department of Biochemistry and Molecular Biology, Institute for Human Infection and Immunity, University of Texas Medical Branch at Galveston (UTMB), TX, United States.
| | - Benjamin A Braun
- Department of Computer Science, Stanford University, United States
| | - Stephen A Y Gipson
- Dept of Agriculture-Agricultural Research Service-Southern Regional Research Center (USDA-ARS-SRRC), New Orleans, LA, United States
| | - Hsiaopo Cheng
- Dept of Agriculture-Agricultural Research Service-Southern Regional Research Center (USDA-ARS-SRRC), New Orleans, LA, United States
| | - Barry K Hurlburt
- Dept of Agriculture-Agricultural Research Service-Southern Regional Research Center (USDA-ARS-SRRC), New Orleans, LA, United States
| | - Soheila J Maleki
- Dept of Agriculture-Agricultural Research Service-Southern Regional Research Center (USDA-ARS-SRRC), New Orleans, LA, United States.
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28
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Guo R, Wang L, Yuan XP, Sun P. Skin Prick Testing to Identify Food Allergens in 8393 Children and Adolescents with Asthma in Chongqing, Southwest China. Med Sci Monit 2019; 25:8221-8229. [PMID: 31676746 PMCID: PMC6854881 DOI: 10.12659/msm.915481] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND The prevalence of food allergies in asthmatic children and adolescents has significantly increased over recent years. Nevertheless, the relevant clinical analyses are still lacking in China. Therefore, the present study aimed to determine common food allergens in pediatric patients with asthma in Chongqing, Southwest China. MATERIAL AND METHODS A total of 8393 asthmatic patients from Children's Hospital of Chongqing Medical University (CHCMU) were enrolled in this retrospective study between October 2014 and July 2017. All patients underwent skin prick test (SPT) with 10 food allergens and recorded history of clinical reactivity. The correlations among the positive rates, categories of allergens, gender, age, and living environment were analyzed. RESULTS A total of 2544 patients (30.31%) had a positive SPT, while the prevalence of food allergy was 8%. Sea crab, peanut, and sea shrimp were the most common food allergens found in the studied population. The frequent food allergies were sea crab, peanuts, and sea shrimp. CONCLUSIONS Identifying allergens is important for the diagnosis and management of allergic disorders, and for performing immunotherapy.
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Affiliation(s)
- Rong Guo
- Respiratory Center, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, China (mainland).,China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Engineering Research Center of Stem Cell Therapy, Chongqing, China (mainland)
| | - Ling Wang
- Respiratory Center, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, China (mainland).,China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Engineering Research Center of Stem Cell Therapy, Chongqing, China (mainland)
| | - Xiao-Ping Yuan
- Respiratory Center, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, China (mainland).,China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Engineering Research Center of Stem Cell Therapy, Chongqing, China (mainland)
| | - Ping Sun
- China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Engineering Research Center of Stem Cell Therapy, Chongqing, China (mainland).,Department of Equipment, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, China (mainland)
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29
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Shah F, Shi A, Ashley J, Kronfel C, Wang Q, Maleki SJ, Adhikari B, Zhang J. Peanut Allergy: Characteristics and Approaches for Mitigation. Compr Rev Food Sci Food Saf 2019; 18:1361-1387. [DOI: 10.1111/1541-4337.12472] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 05/19/2019] [Accepted: 05/22/2019] [Indexed: 12/19/2022]
Affiliation(s)
- Faisal Shah
- Inst. of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key research Laboratory of Agro‐Products ProcessingMinistry of Agriculture Beijing 100193 P. R. China
| | - Aimin Shi
- Inst. of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key research Laboratory of Agro‐Products ProcessingMinistry of Agriculture Beijing 100193 P. R. China
| | - Jon Ashley
- International Iberian Nanotechnology LaboratoryFood Quality and Safety Research group Berga 4715‐330 Portugal
| | - Christina Kronfel
- Food Processing and Sensory Quality ResearchUnited States Dept. of Agriculture New Orleans LA 70124 USA
| | - Qiang Wang
- Inst. of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key research Laboratory of Agro‐Products ProcessingMinistry of Agriculture Beijing 100193 P. R. China
| | - Soheila J. Maleki
- Food Processing and Sensory Quality ResearchUnited States Dept. of Agriculture New Orleans LA 70124 USA
| | - Benu Adhikari
- School of ScienceRMIT Univ. Melbourne VIC 3083 Australia
| | - Jinchuang Zhang
- Inst. of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key research Laboratory of Agro‐Products ProcessingMinistry of Agriculture Beijing 100193 P. R. China
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30
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31
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Mamone G, Di Stasio L, De Caro S, Picariello G, Nicolai MA, Ferranti P. Comprehensive analysis of the peanut allergome combining 2-DE gel-based and gel-free proteomics. Food Res Int 2019; 116:1059-1065. [DOI: 10.1016/j.foodres.2018.09.045] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 09/03/2018] [Accepted: 09/17/2018] [Indexed: 02/04/2023]
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32
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Joo Chan C, Richardo T, Lim RLH. Current Trend in Immunotherapy for Peanut Allergy. Int Rev Immunol 2019; 37:279-290. [DOI: 10.1080/08830185.2018.1509967] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Chong Joo Chan
- Department of Biotechnology, Faculty of Applied Sciences, UCSI University, Cheras, Kuala Lumpur, Malaysia
| | - Timmy Richardo
- Department of Biomedicine, Indonesia International Institute for Life Sciences (i3L), Jakarta, Indonesia
| | - Renee Lay Hong Lim
- Department of Biotechnology, Faculty of Applied Sciences, UCSI University, Cheras, Kuala Lumpur, Malaysia
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33
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Dahl Å. Pollen Lipids Can Play a Role in Allergic Airway Inflammation. Front Immunol 2018; 9:2816. [PMID: 30619246 PMCID: PMC6297749 DOI: 10.3389/fimmu.2018.02816] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Accepted: 11/14/2018] [Indexed: 01/17/2023] Open
Abstract
In seed plants, pollen grains carry the male gametes to female structures. They are frequent in the ambient air, and cause airway inflammation in one out of four persons in the population. This was traditionally attributed to soluble glycoproteins, leaking into the nasal mucosa or the conjunctiva, and able to bind antibodies. It is now more and more recognized that also other immunomodulating compounds are present. Lipids bind to Toll-like and PPARγ receptors belonging to antigen-presenting cells in the mammal immune system, activate invariant Natural Killer T-cells, and are able to induce a Type 2 reaction in effector cells. They may also mimic lipid mediators from mammal mast cells. Pollen grains have a rich lipodome of their own. Among the lipids that have been associated with an atopic reaction are saturated and unsaturated fatty acids, glycophospholipids, sphingolipids, sterols, and oxylipids, as well as lipopolysaccharides from the microbiome on the pollen surface. Lipids can be ligands to allergenic proteins.
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Affiliation(s)
- Åslög Dahl
- Department of Biological and Environmental Sciences, University of Gothenburg, Gothenburg, Sweden
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34
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Magnusdottir H, Vidarsdóttir A, Ludviksson B, Clausen M, Lund S, Jensen A, Sigurdardottir S. Ara h 1 and Ara h 6 Sensitization Causes Clinical Peanut Allergy in Ara h 2-Negative Individuals. Int Arch Allergy Immunol 2018; 178:66-75. [DOI: 10.1159/000493327] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 08/28/2018] [Indexed: 11/19/2022] Open
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35
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Tomczak A, Zielińska-Dawidziak M, Piasecka-Kwiatkowska D, Springer E, Lampart-Szczapa E. Cross-reactions between proteins isolated from new narrow-leafed lupine breeding lines and antibodies present in the sera of patients sensitized to soybeans and peanuts. Eur Food Res Technol 2018. [DOI: 10.1007/s00217-018-3175-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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36
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Sensitization profiles to hazelnut allergens across the United States. Ann Allergy Asthma Immunol 2018; 122:111-116.e1. [PMID: 30292797 DOI: 10.1016/j.anai.2018.09.466] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2018] [Revised: 08/28/2018] [Accepted: 09/28/2018] [Indexed: 12/21/2022]
Abstract
BACKGROUND Measurement of IgE antibody to hazelnut components can aid in the prediction of allergic responses to the food. OBJECTIVE To investigate the association between patient demographics (age, location) and patterns of allergic sensitization to hazelnut components across the United States and to investigate the degree of correlation between hazelnut sensitization with sensitization to other tree nuts, peanuts, and their components. METHODS Serum samples from 10,503 individuals with hazelnut extract specific IgE (sIgE) levels of 0.35 kUA/L or higher were analyzed for IgE antibodies to Cor a 1, 8, 9, and 14 by ImmunoCAP. A subset of these patients were analyzed for IgE antibodies to peanut, walnut, and cashew nut IgE along with associated components. RESULTS Among hazelnut sensitized individuals, children (<3 years old) were predominantly sensitized to Cor a 9 and Cor a 14. Conversely, Cor a 1 sIgE sensitization was much higher in adults than children, especially in the Northeastern United States. Cor a 8 sensitization was relatively constant (near 10%) across all ages. Cosensitization of hazelnut with other tree nuts and peanuts was related to correlation of IgE concentrations of individual component families. CONCLUSION We conclude that sensitization to individual hazelnut components is highly dependent on age and/or geographic location. Component correlations suggest that cosensitization to hazelnut and walnut may be caused by their pathogenesis-related protein 10 allergens, nonspecific lipid transfer proteins, or seed storage proteins, whereas hazelnut and peanut cosensitization is more often caused by cross-reactivity of pathogenesis-related protein 10 (Cor a 1 and Ara h 8) and nonspecific lipid transfer proteins (Cor a 8 and Ara h 9).
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37
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Xu Q, Song B, Liu F, Song Y, Chen P, Liu S, Krishnan HB. Identification and Characterization of β-Lathyrin, an Abundant Glycoprotein of Grass Pea ( Lathyrus sativus L.), as a Potential Allergen. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:8496-8503. [PMID: 30052442 DOI: 10.1021/acs.jafc.8b02314] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Grass pea, a protein-rich, high-yielding, and drought-tolerant legume, is used as food and livestock feed in several tropical and subtropical regions of the world. The abundant seed proteins of grass pea are salt-soluble globulins, which can be separated into vicilins and legumins. In many other legumes, the members of vicilin seed proteins have been identified as major allergens. However, very little information is available on the allergens of grass pea. In this study, we have identified an abundant 47 kDa protein from grass pea, which was recognized by immunoglobulin E (IgE) antibodies from sera drawn from several peanut-allergic patients. The IgE-binding 47 kDa protein was partially purified by affinity chromatography on a Con-A sepharose column. Matrix-assisted laser desorption/ionization-time-of-flight mass spectrometry analysis of the 47 kDa grass pea protein revealed sequence homology to 47 kDa vicilin from pea and Len c 1 from lentil. Interestingly the grass pea vicilin was found to be susceptible to pepsin digestion in vitro. We have also isolated a cDNA encoding the grass pea 47 kDa vicilin (β-lathyrin), and the deduced amino acid sequence revealed extensive homology to several known allergens, including those from peanut and soybean. A homology model structure of the grass pea β-lathyrin, generated using the X-ray crystal structure of the soybean β-conglycinin β subunit as a template, revealed potential IgE-binding epitopes located on the surface of the molecule. The similarity in the three-dimensional structure and the conservation of the antigenic epitopes on the molecular surface of vicilin allergens explains the IgE-binding cross-reactivity.
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Affiliation(s)
- Quanle Xu
- College of Life Sciences , Northwest A&F University , Yangling , Shaanxi 712100 , People's Republic of China
- Plant Science Division , University of Missouri , Columbia , Missouri 65211 , United States
| | - Bo Song
- Plant Science Division , University of Missouri , Columbia , Missouri 65211 , United States
- Key Laboratory of Soybean Biology at the Chinese Ministry of Education , Northeast Agricultural University , Harbin , Heilongjiang 150030 , People's Republic of China
| | - Fengjuan Liu
- College of Life Sciences , Northwest A&F University , Yangling , Shaanxi 712100 , People's Republic of China
| | - Yaoyao Song
- College of Life Sciences , Northwest A&F University , Yangling , Shaanxi 712100 , People's Republic of China
| | - Peng Chen
- College of Life Sciences , Northwest A&F University , Yangling , Shaanxi 712100 , People's Republic of China
| | - Shanshan Liu
- Key Laboratory of Soybean Biology at the Chinese Ministry of Education , Northeast Agricultural University , Harbin , Heilongjiang 150030 , People's Republic of China
| | - Hari B Krishnan
- Plant Science Division , University of Missouri , Columbia , Missouri 65211 , United States
- Plant Genetics Research, Agricultural Research Service (ARS) , United States Department of Agriculture (USDA) , Columbia , Missouri 65211 , United States
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38
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Smeekens JM, Bagley K, Kulis M. Tree nut allergies: Allergen homology, cross-reactivity, and implications for therapy. Clin Exp Allergy 2018; 48:762-772. [PMID: 29700869 DOI: 10.1111/cea.13163] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Tree nut allergy is a potentially life-threatening disease that is increasing in prevalence, now affecting 1% of the general population in the United States. While other food allergies often resolve spontaneously, tree nut allergies are outgrown in less than 10% of cases. Due to the likelihood of cross-sensitization to multiple tree nut allergens, the current treatment guideline is strict avoidance of all nuts once one tree nut allergy has been diagnosed. For example, walnut and pecan are highly cross-reactive, along with cashew and pistachio, but the extent of clinical, IgE-mediated cross-reactivity among other tree nuts remains unclear, therefore making avoidance of all tree nuts a safe approach. There have been recent advances in immunotherapy for food allergies. For instance, there are investigational immunotherapies for milk, egg and peanut allergies, specifically oral immunotherapy, sublingual immunotherapy and epicutaneous immunotherapy. However, there are no large randomized controlled clinical trials for tree nut allergies. Even though there has been less research into tree nut allergy immunotherapies, the evidence of T-cell cross-reactivity among tree nuts exists in animal models and in T cells from allergic patients indicates that immunotherapeutic interventions may be possible. Here, we review the literature regarding epidemiology, allergen homology and cross-reactivity among tree nuts, and explore how current findings can be employed for effective therapy.
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Affiliation(s)
- J M Smeekens
- Department of Pediatrics, UNC School of Medicine, Chapel Hill, NC, USA.,UNC Food Allergy Initiative, Chapel Hill, NC, USA
| | - K Bagley
- Profectus Biosciences, Baltimore, MD, USA
| | - M Kulis
- Department of Pediatrics, UNC School of Medicine, Chapel Hill, NC, USA.,UNC Food Allergy Initiative, Chapel Hill, NC, USA
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A Quantitative Method for Detecting Ara h 2 by Generation and Utilization of Monoclonal Antibodies. J Immunol Res 2018; 2018:4894705. [PMID: 29854839 PMCID: PMC5960532 DOI: 10.1155/2018/4894705] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 02/25/2018] [Indexed: 01/06/2023] Open
Abstract
Peanut (Arachis hypogaea) is one of the most common food allergens that can induce fatal anaphylaxis, and Ara h 2 is one of the major allergen components involved in peanut allergy. The aim of this study was to develop a quantitative method for detecting peanut allergen using monoclonal antibodies against Ara h 2. The splenocytes of immunized mice were fused with myeloma cells (SP2/0), and stable mAb-producing clones were obtained by limiting dilution. mAbs against Ara h 2 were isolated from mouse ascites, and specificity was confirmed by immunoblotting. Five mAbs with high purity and specific reactivity were obtained, which were referred to as 1-2E10, 2-1D5, 3-1C5, 4-1C2, and 5-1G4, respectively. After screening different mAb combinations for development of a sandwich ELISA, we selected 5-1G4 as the capture antibody and 1-2E10 as the detection antibody for the measurement of Ara h 2 from which an optimal correlation between the Ara h 2 concentration and the OD value was obtained. This sandwich ELISA could specifically detect Ara h 2 in peanut extract at concentrations as low as 5 ng/mL and up to 10 μg/mL. These mAbs can, therefore, serve as quantitative diagnostic reagents for peanut and peanut product risk assessment.
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Dodig S, Čepelak I. The potential of component-resolved diagnosis in laboratory diagnostics of allergy. Biochem Med (Zagreb) 2018; 28:020501. [PMID: 29666553 PMCID: PMC5898957 DOI: 10.11613/bm.2018.020501] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 01/28/2018] [Indexed: 02/01/2023] Open
Abstract
The initial laboratory approach in the diagnosis of allergies is to detect the type of allergic reaction, i.e. whether the patient’s allergy is mediated by immunoglobulin E (IgE) or not. For this purpose, the concentration of total serum IgE (tIgE) and specific IgE (sIgE) are determined. Progress in laboratory diagnostics is the use of component-resolved diagnosis (CRD) which implies determination of sIgE against purified native and recombinant allergenic molecules. Component-resolved diagnosis is used in laboratory practice as singleplex and multiplex assays. The choice of allergen for singleplex assay is based on anamnesis, clinical findings of a patient and on skin prick test results. Multiplex-microarray assays simultaneously determine multiple sIgE’s against numerous allergens. The goal of CRD is to distinguish the true allergens from the cross-reactive allergen molecules. Component-resolved diagnosis allows predicting the risk of severe symptoms, as well as anticipating the development of allergies. Thus, determination of sIgE against allergenic components may significantly improve current diagnostics of allergy. Since this method is applied in laboratory practice just a few years, it is necessary to acquire new knowledge and experience, to establish good co-operation between specialist in medical biochemistry and laboratory medicine and the specialist allergologist, so that the method can be applied in a rational manner. Component-resolved diagnosis will significantly improve the diagnostics of IgE-mediated allergy in the future. The aim of this article is to present potentials of CRD in the laboratory diagnostics of allergy mediated by IgE.
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Affiliation(s)
- Slavica Dodig
- Department of medical biochemistry and hematology, Faculty of Pharmacy and Biochemistry, University of Zagreb
| | - Ivana Čepelak
- Department of medical biochemistry and hematology, Faculty of Pharmacy and Biochemistry, University of Zagreb
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Distinguishing allergens from non-allergenic homologues using Physical-Chemical Property (PCP) motifs. Mol Immunol 2018; 99:1-8. [PMID: 29627609 DOI: 10.1016/j.molimm.2018.03.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 03/22/2018] [Accepted: 03/27/2018] [Indexed: 02/07/2023]
Abstract
Quantitative guidelines to distinguish allergenic proteins from related, but non-allergenic ones are urgently needed for regulatory agencies, biotech companies and physicians. In a previous study, we found that allergenic proteins populate a relatively small number of protein families, as characterized by the Pfam database. However, these families also contain non-allergenic proteins, meaning that allergenic determinants must lie within more discrete regions of the sequence. Thus, new methods are needed to discriminate allergenic proteins within those families. Physical-Chemical Properties (PCP)-motifs specific for allergens within a Pfam class were determined for 17 highly populated protein domains. A novel scoring method based on PCP-motifs that characterize known allergenic proteins within these families was developed, and validated for those domains. The motif scores distinguished sequences of allergens from a large selection of 80,000 randomly selected non-allergenic sequences. The motif scores for the birch pollen allergen (Bet v 1) family, which also contains related fruit and nut allergens, correlated better than global sequence similarities with clinically observed cross-reactivities among those allergens. Further, we demonstrated that the average scores of allergen specific motifs for allergenic profilins are significantly different from the scores of non-allergenic profilins. Several of the selective motifs coincide with experimentally determined IgE epitopes of allergenic profilins. The motifs also discriminated allergenic pectate lyases, including Jun a 1 from mountain cedar pollen, from similar proteins in the human microbiome, which can be assumed to be non-allergens. The latter lacked key motifs characteristic of the known allergens, some of which correlate with known IgE binding sites.
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Characterization of narrow-leaf lupin (Lupinus angustifolius L.) recombinant major allergen IgE-binding proteins and the natural β-conglutin counterparts in sweet lupin seed species. Food Chem 2018; 244:60-70. [DOI: 10.1016/j.foodchem.2017.10.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 09/14/2017] [Accepted: 10/05/2017] [Indexed: 11/22/2022]
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Blankestijn MA, Knulst AC, Knol EF, Le TM, Rockmann H, Otten HG, Klemans RJB. Sensitization to PR-10 proteins is indicative of distinctive sensitization patterns in adults with a suspected food allergy. Clin Transl Allergy 2017; 7:42. [PMID: 29201345 PMCID: PMC5700688 DOI: 10.1186/s13601-017-0177-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 10/31/2017] [Indexed: 11/30/2022] Open
Abstract
Background The extent of co-sensitization within and between food protein families in an adult population is largely unknown. This study aimed to identify the most frequently recognized components in the PR-10 and storage protein family, as well as patterns in (co-)sensitization, in a birch-endemic area. Methods Results of ImmunoCAP ISAC, performed during routine care in Dutch adult outpatients suspected of food allergy, were collected. Results A total of 305 patients were selected, aged 16–79 years (median 32 years). Sensitization to one or more PR-10 proteins was most frequent (74% of all subjects), followed by 35% to storage protein and 15% to nsLTPs. Within the PR-10 family, subjects were most often sensitized to Bet v 1 (73% of 305), Cor a 1.04 (72%) and Mal d 1 (68%). Sensitization to PR-10s from soy, celery and kiwi occurred distinctively less often (< 55% of Bet v 1 sensitized subjects) compared to other food PR-10s (all > 70%). Subjects sensitized to these ‘less common PR-10 proteins’ were sensitized to more food and inhalant components on the ISAC, compared to subjects sensitized to ‘common PR-10 proteins’ (median 22 vs 13 out of 112, p < 0.0001). Seven subjects demonstrated sensitization to food PR-10 proteins, without concomitant sensitization to pollen PR-10s. Within the storage proteins, sensitization to multiple peanut allergens was most common (on average 3 out of 4). Conclusions Sensitization to PR-10 food proteins could occur without concomitant sensitization to common PR-10 from pollen in a subset of subjects. Less commonly recognized PR-10 proteins appear to be an indication of polysensitization. Electronic supplementary material The online version of this article (10.1186/s13601-017-0177-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Mark A Blankestijn
- Department of Dermatology and Allergology, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
| | - André C Knulst
- Department of Dermatology and Allergology, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
| | - Edward F Knol
- Department of Dermatology and Allergology, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands.,Laboratory of Translational Immunology, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
| | - Thuy-My Le
- Department of Dermatology and Allergology, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
| | - Heike Rockmann
- Department of Dermatology and Allergology, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
| | - Henny G Otten
- Laboratory of Translational Immunology, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
| | - Rob J B Klemans
- Department of Dermatology and Allergology, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
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Affiliation(s)
- Ondulla T. Toomer
- United States Department of Agriculture-Agricultural Research Service, Market Quality and Handling Research Unit, Raleigh, NC, USA
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Nut Allergy in Two Different Areas of Spain: Differences in Clinical and Molecular Pattern. Nutrients 2017; 9:nu9080909. [PMID: 28825657 PMCID: PMC5579702 DOI: 10.3390/nu9080909] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 08/11/2017] [Accepted: 08/17/2017] [Indexed: 11/25/2022] Open
Abstract
Introduction: Different clinical and molecular patterns of food allergy have been reported in different areas of the world. The aim of the study is to evaluate differences in allergen patterns among nut-allergic patients in two different areas of Spain. Material and methods: A total of 77 patients with nut allergy from two different regions of Spain (Madrid and Asturias) were evaluated. Results: Hazelnut, peanut, and walnut were the three most frequent nuts eliciting allergy in both regions, but in a different order. Patients from Madrid experienced systemic reactions more often than patients from Asturias (73.5% Madrid vs. 50.0%, p < 0.05). The percentage of sensitizations to LTP (Lipid Transfer Protein) was higher than Bet v 1 (p < 0.05) in the Madrid area. The percentage of sensitizations in Asturias area was similar to LTP than Bet v 1 (Pru p 3 46.4%, Bet v 1 42.9%, ns). Bet v 1 was the predominant allergen involved among hazelnut-allergic patients (56.2%), while LTP was more common in peanut-allergic patients (61.5%). Conclusion: Walnut, hazelnut, and peanut were the most frequent nuts eliciting allergy in Spain. Despite this, important differences in molecular pattern were appreciated not only between both regions, but also among nut-allergic patients in Asturias. The different molecular pattern was linked to the frequency of systemic symptoms.
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Mateo-Morejón M, Labrada-Rosado A, Torralba-Averoff D, Cruz-Jimenez R, Oliva-Díaz Y, Álvarez-Castelló M, Ciria-Martín A, Jiménez-Frandín M, Reyes-Zamora MC, Castro-Almarales RL, Tamargo-García B. Is peanut causing food allergy in Cuba? Preliminary assessment of allergic sensitization and IgE specificity profile to peanut allergens in Cuban allergic patients. World Allergy Organ J 2017; 10:26. [PMID: 28725335 PMCID: PMC5504782 DOI: 10.1186/s40413-017-0156-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Accepted: 05/22/2017] [Indexed: 11/10/2022] Open
Abstract
Background Peanut allergy is increasing at an alarming pace in developed countries. Peanut (Arachis hypogaea) is a common food in Cuba. Nevertheless, reported values of sensitization and symptom severity are usually low. As our objective, we carried out an evaluation of allergic sensitivity to perform an assessment of allergic sensitization and IgE specificity profile to peanut allergens in Cuban allergic patients. Methods The Skin Prick Test (SPT) was performed for each patient, using two glycerinated allergenic extracts, prepared from raw or roasted peanuts. Overall, 316 food allergic patients (159 adults and 157 children) attending allergy services at four hospitals in Havana were included, as well as 303 adult non- allergic volunteers. The IgE binding profile of 26 selected SPT positive patients was further analyzed by immunoblotting. Results The prevalence of sensitization to peanut was 4.6% in general adult population, whereas in adult food-allergic patients it was 18.6%. Prevalence rates were even greater in food allergic children achieving 25.8%. Sensitization frequencies were apparently greater for roasted, as compared to raw peanuts, although the difference was not significant (p> 0.05, Mc Nemar's). IgE binding was shown mostly by the 15 and 17 kDa bands, tentatively identified as the major allergens Ara h 2 and Ara h 6. The IgG4 binding profile was similar to IgE, although with more prominence of the bands at 37 and 28 KDa, corresponding to an Ara h 3 fragment and Peanut Agglutinin. Discussion The study estimated a relatively high prevalence of peanut sensitization in population. Data reported here suggest that IgE sensitization in Cuban patients is focused mostly on MW bands corresponding to the major allergens Ara h 6 and Ara h 2. Conclusions Sensitization to peanut allergen is indeed relatively frequent in Cuba. The IgE profile is congruent to a sensitization pattern by ingestion of roasted peanuts and is directed to well-known major allergens.
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Affiliation(s)
- Mayteé Mateo-Morejón
- Allergen Department, Centro Nacional de Biopreprados, Carretera Beltran Km 1 ½, Bejucal, Mayabeque Cuba
| | - Alexis Labrada-Rosado
- Allergen Department, Centro Nacional de Biopreprados, Carretera Beltran Km 1 ½, Bejucal, Mayabeque Cuba
| | - Damaris Torralba-Averoff
- Allergen Department, Centro Nacional de Biopreprados, Carretera Beltran Km 1 ½, Bejucal, Mayabeque Cuba
| | - Rayza Cruz-Jimenez
- Allergen Department, Centro Nacional de Biopreprados, Carretera Beltran Km 1 ½, Bejucal, Mayabeque Cuba
| | - Yunia Oliva-Díaz
- Allergen Department, Centro Nacional de Biopreprados, Carretera Beltran Km 1 ½, Bejucal, Mayabeque Cuba
| | | | | | | | - Mary Carmen Reyes-Zamora
- Allergen Department, Centro Nacional de Biopreprados, Carretera Beltran Km 1 ½, Bejucal, Mayabeque Cuba
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Gupta RK, Gupta K, Sharma A, Das M, Ansari IA, Dwivedi PD. Maillard reaction in food allergy: Pros and cons. Crit Rev Food Sci Nutr 2017; 58:208-226. [PMID: 26980434 DOI: 10.1080/10408398.2016.1152949] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Food allergens have a notable potential to induce various health concerns in susceptible individuals. The majority of allergenic foods are usually subjected to thermal processing prior to their consumption. However, during thermal processing and long storage of foods, Maillard reaction (MR) often takes place. The MR is a non-enzymatic glycation reaction between the carbonyl group of reducing sugars and compounds having free amino groups. MR may sometimes be beneficial by damaging epitope of allergens and reducing allergenic potential, while exacerbation in allergic reactions may also occur due to changes in the motifs of epitopes or neoallergen generation. Apart from these modulations, non-enzymatic glycation can also modify the food protein(s) with various type of advance glycation end products (AGEs) such as Nϵ-(carboxymethyl-)lysine (CML), pentosidine, pyrraline, and methylglyoxal-H1 derived from MR. These Maillard products may act as immunogen by inducing the activation and proliferation of various immune cells. Literature is available to understand pathogenesis of glycation in the context of various diseases but there is hardly any review that can provide a thorough insight on the impact of glycation in food allergy. Therefore, present review explores the pathogenesis with special reference to food allergy caused by non-enzymatic glycation as well as AGEs.
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Affiliation(s)
- Rinkesh Kumar Gupta
- a Food, Drug and Chemical Toxicology Group, Indian Institute of Toxicology Research , Lucknow -, India.,b Department of Biosciences , Integral University , Lucknow , India
| | - Kriti Gupta
- a Food, Drug and Chemical Toxicology Group, Indian Institute of Toxicology Research , Lucknow -, India
| | - Akanksha Sharma
- a Food, Drug and Chemical Toxicology Group, Indian Institute of Toxicology Research , Lucknow -, India.,c Academy of Scientific and Innovative Research (AcSIR), CSIR-IITR Capmus , Lucknow , India
| | - Mukul Das
- a Food, Drug and Chemical Toxicology Group, Indian Institute of Toxicology Research , Lucknow -, India
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Andorf S, Borres MP, Block W, Tupa D, Bollyky JB, Sampath V, Elizur A, Lidholm J, Jones JE, Galli SJ, Chinthrajah RS, Nadeau KC. Association of Clinical Reactivity with Sensitization to Allergen Components in Multifood-Allergic Children. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY-IN PRACTICE 2017; 5:1325-1334.e4. [PMID: 28351786 DOI: 10.1016/j.jaip.2017.01.016] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 01/18/2017] [Accepted: 01/26/2017] [Indexed: 11/30/2022]
Abstract
BACKGROUND Thirty percent of children with food allergies have multiple simultaneous allergies; however, the features of these multiple allergies are not well characterized serologically or clinically. OBJECTIVE We comprehensively evaluated 60 multifood-allergic patients by measuring serum IgE to key allergen components, evaluating clinical histories and medication use, performing skin tests, and conducting double-blind, placebo-controlled food challenges (DBPCFCs). METHODS Sixty participants with multiple food allergies were characterized by clinical history, DBPCFCs, total IgE, specific IgE, and component-resolved diagnostics (IgE and IgG4) data. The food allergens tested were almond, egg, milk, sesame, peanut, pecan, walnut, hazelnut, cashew, pistachio, soy, and wheat. RESULTS Our data demonstrate that of the reactions observed during a graded DBPCFC, gastrointestinal reactions occurred more often in boys than in girls, as well as in individuals with high levels of IgE to 2S albumins from cashew, walnut, and hazelnut. Certain food allergies often occurred concomitantly in individuals (ie, cashew/pistachio and walnut/pecan/hazelnut). IgE testing to components further corroborated serological relationships between and among these clustered food allergies. CONCLUSIONS Associations of certain food allergies were shown by DBPCFC outcomes as well as by correlations in IgE reactivity to structurally related food allergen components. Each of these criteria independently demonstrated a significant association between allergies to cashew and pistachio, as well as among allergies to walnut, pecan, and hazelnut.
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Affiliation(s)
- Sandra Andorf
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Stanford University, Stanford, Calif; Sean N. Parker Center for Allergy and Asthma Research, Stanford University, Stanford, Calif
| | - Magnus P Borres
- Thermo Fisher Scientific, Immunodiagnostics, Uppsala, Sweden; Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden
| | - Whitney Block
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Stanford University, Stanford, Calif; Sean N. Parker Center for Allergy and Asthma Research, Stanford University, Stanford, Calif
| | - Dana Tupa
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Stanford University, Stanford, Calif; Sean N. Parker Center for Allergy and Asthma Research, Stanford University, Stanford, Calif
| | - Jennifer B Bollyky
- Division of General Medicine, Department of Medicine, Stanford University, Stanford, Calif
| | - Vanitha Sampath
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Stanford University, Stanford, Calif; Sean N. Parker Center for Allergy and Asthma Research, Stanford University, Stanford, Calif
| | - Arnon Elizur
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Stanford University, Stanford, Calif; Sean N. Parker Center for Allergy and Asthma Research, Stanford University, Stanford, Calif
| | - Jonas Lidholm
- Thermo Fisher Scientific, Immunodiagnostics, Uppsala, Sweden
| | - Joseph E Jones
- Thermo Fisher Scientific, Immunodiagnostics, Kalamazoo, Mich
| | - Stephen J Galli
- Sean N. Parker Center for Allergy and Asthma Research, Stanford University, Stanford, Calif; Departments of Pathology and of Microbiology and Immunology, Stanford University School of Medicine, Stanford, Calif
| | - Rebecca S Chinthrajah
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Stanford University, Stanford, Calif; Sean N. Parker Center for Allergy and Asthma Research, Stanford University, Stanford, Calif
| | - Kari C Nadeau
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Stanford University, Stanford, Calif; Sean N. Parker Center for Allergy and Asthma Research, Stanford University, Stanford, Calif.
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Anzengruber J, Bublin M, Bönisch E, Janesch B, Tscheppe A, Braun ML, Varga EM, Hafner C, Breiteneder H, Schäffer C. Lactobacillus buchneri S-layer as carrier for an Ara h 2-derived peptide for peanut allergen-specific immunotherapy. Mol Immunol 2017; 85:81-88. [PMID: 28212503 DOI: 10.1016/j.molimm.2017.02.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 02/02/2017] [Accepted: 02/06/2017] [Indexed: 02/06/2023]
Abstract
Peanut allergy is an IgE-mediated severe hypersensitivity disorder. The lack of a treatment of this potentially fatal allergy has led to intensive research on vaccine development. Here, we describe the design and initial characterization of a carrier-bound peptide derived from the most potent peanut allergen, Ara h 2, as a candidate vaccine. Based on the adjuvant capability of bacterial surface (S-) layers, a fusion protein of the S-layer protein SlpB from Lactobacillus buchneri CD034 and the Ara h 2-derived peptide AH3a42 was produced. This peptide comprised immunodominant B-cell epitopes as well as one T cell epitope. The fusion protein SlpB-AH3a42 was expressed in E. coli, purified, and tested for its IgE binding capacity as well as for its ability to activate sensitized rat basophil leukemia (RBL) cells. The capacity of Ara h 2-specific IgG rabbit-antibodies raised against SlpB-AH3a42 or Ara h 2 to inhibit IgE-binding was determined by ELISA inhibition assays using sera of peanut allergic patients sensitized to Ara h 2. IgE specific to the SlpB-AH3a42 fusion protein was detected in 69% (25 of 36) of the sera. Despite the recognition by IgE, the SlpB-AH3a42 fusion protein was unable to induce β-hexosaminidase release from sensitized RBL cells at concentrations up to 100ng per ml. The inhibition of IgE-binding to the natural allergen observed after pre-incubation of the 20 sera with rabbit anti-SlpB-AH3a42 IgG was more than 30% for four sera, more than 20% for eight sera, and below 10% for eight sera. In comparison, anti-Ara h 2 rabbit IgG antibodies inhibited binding to Ara h 2 by 48% ±13.5%. Our data provide evidence for the feasibility of this novel approach towards the development of a peanut allergen peptide-based carrier-bound vaccine. Our experiments further indicate that more than one allergen-peptide will be needed to induce a broader protection of patients allergic to Ara h 2.
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Affiliation(s)
- Julia Anzengruber
- Department of NanoBiotechnology, NanoGlycobiology Unit, Universität für Bodenkultur Wien, Muthgasse 11, 1190 Vienna, Austria
| | - Merima Bublin
- Department of Pathophysiology and Allergy Research, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
| | - Eva Bönisch
- Department of NanoBiotechnology, NanoGlycobiology Unit, Universität für Bodenkultur Wien, Muthgasse 11, 1190 Vienna, Austria
| | - Bettina Janesch
- Department of NanoBiotechnology, NanoGlycobiology Unit, Universität für Bodenkultur Wien, Muthgasse 11, 1190 Vienna, Austria
| | - Angelika Tscheppe
- Department of Pathophysiology and Allergy Research, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
| | - Matthias L Braun
- Department of NanoBiotechnology, NanoGlycobiology Unit, Universität für Bodenkultur Wien, Muthgasse 11, 1190 Vienna, Austria
| | - Eva-Maria Varga
- Department of Pediatrics, Respiratory and Allergic Disease Division, Medical University Graz, Auenbruggerplatz 34, 8036 Graz, Austria
| | - Christine Hafner
- Department of Dermatology, University Hospital St. Pölten, Karl Landsteiner University of Health Sciences, Propst-Führer-Strasse 4, 3100 St. Pölten, Austria
| | - Heimo Breiteneder
- Department of Pathophysiology and Allergy Research, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
| | - Christina Schäffer
- Department of NanoBiotechnology, NanoGlycobiology Unit, Universität für Bodenkultur Wien, Muthgasse 11, 1190 Vienna, Austria
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Simultaneous Determination of the Main Peanut Allergens in Foods Using Disposable Amperometric Magnetic Beads-Based Immunosensing Platforms. CHEMOSENSORS 2016. [DOI: 10.3390/chemosensors4030011] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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