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Ruiz-Valdepeñas Montiel V, Gamella M, Blázquez-García M, Serafín V, Molina E, Pingarrón JM, Benedé S, Campuzano S. Electrochemical bioplatform to manage alpha-gal syndrome by tracking the carbohydrate allergen in meat. Talanta 2024; 273:125851. [PMID: 38447339 DOI: 10.1016/j.talanta.2024.125851] [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: 11/01/2023] [Revised: 02/05/2024] [Accepted: 02/28/2024] [Indexed: 03/08/2024]
Abstract
This work presents the first bioplatform described to date for the determination of galactose-α-1,3-galactose (α-Gal), a non-primate mammalian oligosaccharide responsible for almost all cases of red meat allergy. The bioplatform is based on the implementation of an indirect competitive immunoassay and enzymatic labeling with the enzyme horseradish peroxidase (HRP) built on the surface of magnetic microparticles (MBs) and amperometric transduction on screen-printed carbon electrodes (SPCEs) using the H2O2/hydroquinone (HQ) system. The target α-Gal competed with biotinylated α-Gal immobilized on the surface of neutravidin-modified MBs for the limited immunorecognition sites of a detection antibody enzymatically labeled with an HRP-conjugated secondary antibody. The resulting magnetic immunoconjugates were trapped on the surface of the SPCE working electrode and amperometric transduction was performed, providing a cathodic current variation inversely proportional to the concentration of α-Gal in the analyzed sample. The developed biotool was optimized, characterized and applied with satisfactory results to the determination of the target allergen in different samples of raw and processed meats.
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Affiliation(s)
| | - María Gamella
- Dept. Analytical Chemistry, Faculty of Chemistry, Universidad Complutense de Madrid, 28040, Madrid, Spain
| | - Marina Blázquez-García
- Dept. Analytical Chemistry, Faculty of Chemistry, Universidad Complutense de Madrid, 28040, Madrid, Spain
| | - Verónica Serafín
- Dept. Analytical Chemistry, Faculty of Chemistry, Universidad Complutense de Madrid, 28040, Madrid, Spain
| | - Elena Molina
- Instituto de Investigación en Ciencias de la Alimentación (CIAL), CSIC-UAM, Nicolás Cabrera, 9, 28049, Madrid, Spain
| | - José M Pingarrón
- Dept. Analytical Chemistry, Faculty of Chemistry, Universidad Complutense de Madrid, 28040, Madrid, Spain
| | - Sara Benedé
- Instituto de Investigación en Ciencias de la Alimentación (CIAL), CSIC-UAM, Nicolás Cabrera, 9, 28049, Madrid, Spain; Dept. Immunology, Ophthalmology and ORL, Faculty of Medicine, Universidad Complutense de Madrid, 28040, Madrid, Spain.
| | - Susana Campuzano
- Dept. Analytical Chemistry, Faculty of Chemistry, Universidad Complutense de Madrid, 28040, Madrid, Spain.
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Hils M, Hoffard N, Iuliano C, Kreft L, Chakrapani N, Swiontek K, Fischer K, Eberlein B, Köberle M, Fischer J, Hilger C, Ohnmacht C, Kaesler S, Wölbing F, Biedermann T. IgE and anaphylaxis specific to the carbohydrate alpha-gal depend on IL-4. J Allergy Clin Immunol 2024; 153:1050-1062.e6. [PMID: 38135009 PMCID: PMC10997276 DOI: 10.1016/j.jaci.2023.12.003] [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: 05/15/2023] [Revised: 11/23/2023] [Accepted: 12/01/2023] [Indexed: 12/24/2023]
Abstract
BACKGROUND Alpha-gal (Galα1-3Galβ1-4GlcNAc) is a carbohydrate with the potential to elicit fatal allergic reactions to mammalian meat and drugs of mammalian origin. This type of allergy is induced by tick bites, and therapeutic options for this skin-driven food allergy are limited to the avoidance of the allergen and treatment of symptoms. Thus, a better understanding of the immune mechanisms resulting in sensitization through the skin is crucial, especially in the case of a carbohydrate allergen for which underlying immune responses are poorly understood. OBJECTIVE We aimed to establish a mouse model of alpha-gal allergy for in-depth immunologic analyses. METHODS Alpha-galactosyltransferase 1-deficient mice devoid of alpha-gal glycosylations were sensitized with the alpha-gal-carrying self-protein mouse serum albumin by repetitive intracutaneous injections in combination with the adjuvant aluminum hydroxide. The role of basophils and IL-4 in sensitization was investigated by antibody-mediated depletion. RESULTS Alpha-gal-sensitized mice displayed increased levels of alpha-gal-specific IgE and IgG1 and developed systemic anaphylaxis on challenge with both alpha-gal-containing glycoproteins and glycolipids. In accordance with alpha-gal-allergic patients, we detected elevated numbers of basophils at the site of sensitization as well as increased numbers of alpha-gal-specific B cells, germinal center B cells, and B cells of IgE and IgG1 isotypes in skin-draining lymph nodes. By depleting IL-4 during sensitization, we demonstrated for the first time that sensitization and elicitation of allergy to alpha-gal and correspondingly to a carbohydrate allergen is dependent on IL-4. CONCLUSION These findings establish IL-4 as a potential target to interfere with alpha-gal allergy elicited by tick bites.
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Affiliation(s)
- Miriam Hils
- Department of Dermatology and Allergy Biederstein, School of Medicine, Technical University of Munich, Munich, Germany
| | - Nils Hoffard
- Department of Dermatology and Allergy Biederstein, School of Medicine, Technical University of Munich, Munich, Germany
| | - Caterina Iuliano
- Department of Dermatology and Allergy Biederstein, School of Medicine, Technical University of Munich, Munich, Germany
| | - Luisa Kreft
- Center of Allergy and Environment (ZAUM) and Institute of Allergy Research, Technical University of Munich, School of Medicine, and Helmholtz Center Munich, Research Center for Environmental Health, Neuherberg, Germany
| | - Neera Chakrapani
- Department of Infection and Immunity, Luxembourg Institute of Health (LIH), Esch-sur-Alzette, Luxembourg; Faculty of Science, Technology and Medicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Kyra Swiontek
- Department of Infection and Immunity, Luxembourg Institute of Health (LIH), Esch-sur-Alzette, Luxembourg
| | - Konrad Fischer
- Department of Livestock Biotechnology, School of Life Sciences Weihenstephan, Technical University of Munich, Freising, Germany
| | - Bernadette Eberlein
- Department of Dermatology and Allergy Biederstein, School of Medicine, Technical University of Munich, Munich, Germany
| | - Martin Köberle
- Department of Dermatology and Allergy Biederstein, School of Medicine, Technical University of Munich, Munich, Germany
| | - Jörg Fischer
- Department of Dermatology, Faculty of Medicine, Eberhard Karls University Tübingen, Tübingen, Germany; Department of Dermatology and Allergology, University Hospital Augsburg, Augsburg, Germany
| | - Christiane Hilger
- Department of Infection and Immunity, Luxembourg Institute of Health (LIH), Esch-sur-Alzette, Luxembourg
| | - Caspar Ohnmacht
- Center of Allergy and Environment (ZAUM) and Institute of Allergy Research, Technical University of Munich, School of Medicine, and Helmholtz Center Munich, Research Center for Environmental Health, Neuherberg, Germany
| | - Susanne Kaesler
- Department of Dermatology and Allergy Biederstein, School of Medicine, Technical University of Munich, Munich, Germany
| | - Florian Wölbing
- Department of Dermatology and Allergy Biederstein, School of Medicine, Technical University of Munich, Munich, Germany
| | - Tilo Biedermann
- Department of Dermatology and Allergy Biederstein, School of Medicine, Technical University of Munich, Munich, Germany.
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Wang Y, Hils M, Fischer A, Wölbing F, Biedermann T, Schnieke A, Fischer K. Gene-edited pigs: a translational model for human food allergy against alpha-Gal and anaphylaxis. Front Immunol 2024; 15:1358178. [PMID: 38469303 PMCID: PMC10925645 DOI: 10.3389/fimmu.2024.1358178] [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: 12/19/2023] [Accepted: 02/06/2024] [Indexed: 03/13/2024] Open
Abstract
The prevalence of food allergy is rising and is estimated to approach 10%. Red meat allergy is the first known food allergy elicited by immunoglobulin E (IgE) antibodies recognizing a carbohydrate. Due to the loss of function of the alpha-1,3-galactosyltransferase (GGTA1) gene in humans, the disaccharide galactose-α-1,3-galactose (α-Gal) cannot be synthesized and therefore became immunogenic. IgE sensitization is elicited through the skin by repetitive tick bites transmitting α-Gal. The underlying mechanisms regarding innate and adaptive immune cell activation, including the B-cell isotype switch to IgE, are poorly understood, requiring further research and physiologically relevant animal models. Here, we describe a new animal model of red meat allergy using percutaneous α-Gal sensitization of gene-edited GGTA1-deficient pigs. Total and α-Gal-specific IgG, IgG1, IgG2, IgG4, and IgE levels were tracked. Further key factors associated with allergic skin inflammation, type 2 immunity, and allergy development were measured in PBMCs and skin samples. Significant increases in α-Gal-specific IgG1 and IgE levels indicated successful sensitization to the allergen α-Gal. Intracutaneous sensitizations with α-Gal recruited lymphocytes to the skin, including elevated numbers of T helper 2 (Th2) cells. Finally, α-Gal-sensitized pigs not only recognized α-Gal as non-self-antigen following α-Gal exposure through the skin but also developed anaphylaxis upon antigen challenge. Based on the similarities between the porcine and human skin, this new large animal model for α-Gal allergy should help to unveil the consecutive steps of cutaneous sensitization and aid the development of prophylactic and treatment interventions.
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Affiliation(s)
- Ying Wang
- Chair of Livestock Biotechnology, School of Life Sciences Weihenstephan, Technical University of Munich, Freising, Germany
| | - Miriam Hils
- Department of Dermatology and Allergy Biederstein, School of Medicine, Technical University of Munich, Munich, Germany
| | - Andrea Fischer
- Chair of Livestock Biotechnology, School of Life Sciences Weihenstephan, Technical University of Munich, Freising, Germany
| | - Florian Wölbing
- Department of Dermatology and Allergy Biederstein, School of Medicine, Technical University of Munich, Munich, Germany
| | - Tilo Biedermann
- Department of Dermatology and Allergy Biederstein, School of Medicine, Technical University of Munich, Munich, Germany
| | - Angelika Schnieke
- Chair of Livestock Biotechnology, School of Life Sciences Weihenstephan, Technical University of Munich, Freising, Germany
| | - Konrad Fischer
- Chair of Livestock Biotechnology, School of Life Sciences Weihenstephan, Technical University of Munich, Freising, Germany
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Sharma SR, Choudhary SK, Vorobiov J, Commins SP, Karim S. Tick bite-induced alpha-gal syndrome and immunologic responses in an alpha-gal deficient murine model. Front Immunol 2024; 14:1336883. [PMID: 38390396 PMCID: PMC10882631 DOI: 10.3389/fimmu.2023.1336883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Accepted: 12/26/2023] [Indexed: 02/24/2024] Open
Abstract
Introduction Alpha-Gal Syndrome (AGS) is a delayed allergic reaction due to specific IgE antibodies targeting galactose-α-1,3-galactose (α-gal), a carbohydrate found in red meat. This condition has gained significant attention globally due to its increasing prevalence, with more than 450,000 cases estimated just in the United States alone. Previous research has established a connection between AGS and tick bites, which sensitize individuals to α-gal antigens and elevate the levels of specific IgE. However, the precise mechanism by which tick bites influence the host's immune system and contribute to the development of AGS remains poorly understood. This study investigates various factors related to ticks and the host associated with the development of AGS following a tick bite, using mice with a targeted disruption of alpha-1,3-galactosyltransferase (AGKO) as a model organism. Methods Lone-star tick (Amblyomma americanum) and gulf-coast tick (Amblyomma maculatum) nymphs were used to sensitize AGKO mice, followed by pork meat challenge. Tick bite site biopsies from sensitized and non-sensitized mice were subjected to mRNA gene expression analysis to assess the host immune response. Antibody responses in sensitized mice were also determined. Results Our results showed a significant increase in the total IgE, IgG1, and α-gal IgG1 antibodies titers in the lone-star tick-sensitized AGKO mice compared to the gulf-coast tick-sensitized mice. Pork challenge in Am. americanum -sensitized mice led to a decline in body temperature after the meat challenge. Gene expression analysis revealed that Am. americanum bites direct mouse immunity toward Th2 and facilitate host sensitization to the α-gal antigen. Conclusion This study supports the hypothesis that specific tick species may increase the risk of developing α-gal-specific IgE and hypersensitivity reactions or AGS, thereby providing opportunities for future research on the mechanistic role of tick and host-related factors in AGS development.
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Affiliation(s)
- Surendra Raj Sharma
- School of Biological, Environment and Earth Sciences, The University of Southern Mississippi, Hattiesburg, MS, United States
| | - Shailesh K Choudhary
- Department of Medicine and Pediatrics, University of North Carolina, Chapel Hill, NC, United States
| | - Julia Vorobiov
- Department of Medicine and Pediatrics, University of North Carolina, Chapel Hill, NC, United States
| | - Scott P Commins
- Department of Medicine and Pediatrics, University of North Carolina, Chapel Hill, NC, United States
| | - Shahid Karim
- School of Biological, Environment and Earth Sciences, The University of Southern Mississippi, Hattiesburg, MS, United States
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Perusko M, Grundström J, Eldh M, Hamsten C, Apostolovic D, van Hage M. The α-Gal epitope - the cause of a global allergic disease. Front Immunol 2024; 15:1335911. [PMID: 38318181 PMCID: PMC10838981 DOI: 10.3389/fimmu.2024.1335911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 01/02/2024] [Indexed: 02/07/2024] Open
Abstract
The galactose-α-1,3-galactose (α-Gal) epitope is the cause of a global allergic disease, the α-Gal syndrome (AGS). It is a severe form of allergy to food and products of mammalian origin where IgE against the mammalian carbohydrate, α-Gal, is the cause of the allergic reactions. Allergic reactions triggered by parenterally administered α-Gal sources appear immediately, but those triggered via the oral route appear with a latency of several hours. The α-Gal epitope is highly immunogenic to humans, apes and old-world monkeys, all of which produce anti-α-Gal antibodies of the IgM, IgA and IgG subclasses. Strong evidence suggests that in susceptible individuals, class switch to IgE occurs after several tick bites. In this review, we discuss the strong immunogenic role of the α-Gal epitope and its structural resemblance to the blood type B antigen. We emphasize the broad abundance of α-Gal in different foods and pharmaceuticals and the allergenicity of various α-Gal containing molecules. We give an overview of the association of tick bites with the development of AGS and describe innate and adaptive immune response to tick saliva that possibly leads to sensitization to α-Gal. We further discuss a currently favored hypothesis explaining the mechanisms of the delayed effector phase of the allergic reaction to α-Gal. We highlight AGS from a clinical point of view. We review the different clinical manifestations of the disease and the prevalence of sensitization to α-Gal and AGS. The usefulness of various diagnostic tests is discussed. Finally, we provide different aspects of the management of AGS. With climate change and global warming, the tick density is increasing, and their geographic range is expanding. Thus, more people will be affected by AGS which requires more knowledge of the disease.
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Affiliation(s)
- Marija Perusko
- Division of Immunology and Allergy, Department of Medicine Solna, Karolinska Institutet, and Karolinska University Hospital, Stockholm, Sweden
- Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
- Innovative Centre of the Faculty of Chemistry, University of Belgrade, Belgrade, Serbia
| | - Jeanette Grundström
- Division of Immunology and Allergy, Department of Medicine Solna, Karolinska Institutet, and Karolinska University Hospital, Stockholm, Sweden
- Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Maria Eldh
- Division of Immunology and Allergy, Department of Medicine Solna, Karolinska Institutet, and Karolinska University Hospital, Stockholm, Sweden
- Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Carl Hamsten
- Division of Immunology and Allergy, Department of Medicine Solna, Karolinska Institutet, and Karolinska University Hospital, Stockholm, Sweden
- Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Danijela Apostolovic
- Division of Immunology and Allergy, Department of Medicine Solna, Karolinska Institutet, and Karolinska University Hospital, Stockholm, Sweden
- Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Marianne van Hage
- Division of Immunology and Allergy, Department of Medicine Solna, Karolinska Institutet, and Karolinska University Hospital, Stockholm, Sweden
- Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
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Nourian MM, Stone CA, Siegrist KK, Riess ML. Perioperative implications of patients with alpha gal allergies. J Clin Anesth 2023; 86:111056. [PMID: 36682226 PMCID: PMC11087933 DOI: 10.1016/j.jclinane.2023.111056] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 12/14/2022] [Accepted: 01/15/2023] [Indexed: 01/21/2023]
Abstract
Alpha Gal Syndrome (AGS) is an emerging immune response to mammalian products (MP) containing the oligosaccharide galactose-α-1,3 galactose (α-Gal) which includes meats and inactive ingredients in certain medications. This becomes clinically important in the perioperative realm as MPs are commonly found in the operating room, and pre- and post-operative settings, and can trigger responses as severe as anaphylaxis. In this review, authors discuss the epidemiology, diagnosis and treatment of AGS reactions. Additionally, strategies are explored in order to screen and prevent exposure to MP with a multidisciplinary approach. While this emerging allergy is still not fully understood, it is of paramount importance that all anesthesia providers recognize the implications of MP exposure in AGS patients and ultimately prevent harm in this highly vulnerable population.
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Affiliation(s)
- Maziar M Nourian
- Department of Anesthesiology, Vanderbilt University Medical Center, 1161 21(st) Avenue South, Nashville, TN 37232, USA.
| | - Cosby A Stone
- Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine, Vanderbilt University Medical Center, 1211 Medical Center Dr, Nashville, TN 37232, USA.
| | - Kara K Siegrist
- Department of Anesthesiology, Vanderbilt University Medical Center, 1161 21(st) Avenue South, Nashville, TN 37232, USA.
| | - Matthias L Riess
- Department of Anesthesiology, Vanderbilt University Medical Center, 1161 21(st) Avenue South, Nashville, TN 37232, USA; Anesthesiology, Tennessee Valley Healthcare System Veterans Affairs Medical Center, 1310 24(th) Ave South, Nashville, TN 37212, USA; Department of Pharmacology, Vanderbilt University, 465 21(st) Avenue South, Nashville, TN 37232, USA.
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7
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Apostolovic D, Grundström J, Kiewiet MBG, Perusko M, Hamsten C, Starkhammar M, Paulie S, van Hage M. Th2-skewed T cells correlate with B cell response to α-Gal and tick antigens in α-Gal syndrome. J Clin Invest 2023; 133:158357. [PMID: 36701195 PMCID: PMC10014093 DOI: 10.1172/jci158357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 01/25/2023] [Indexed: 01/27/2023] Open
Abstract
Tick bites have been shown to transmit a novel form of severe food allergy, the galactose-α-1,3-galactose (α-Gal) syndrome (AGS). Cellular responses to α-Gal in patients with AGS have, to date, not been thoroughly scrutinized. Therefore, we investigated T and B cell proliferation, activation, and cytokine profiles in response to tick protein extract (TE) and α-Gal-free TE in patients with AGS and in healthy controls. T and B cells from both patients and controls proliferated in response to TE, but significantly more in patients with AGS. B cell proliferation, but not T cell proliferation, in patients with AGS was reduced by removing α-Gal from the TE. In addition, TE induced a clear Th2 cytokine profile in patients with AGS. Expression of CD23 by B cells correlated only to T cell proliferation. However, both B cell proliferation and CD23 expression were reduced when CD40L and IL-4 were blocked. A large portion of the IgG1 and IgE antibodies binding TE in patients with AGS were directed against the α-Gal epitope. We have, for what we believe to be the first time, investigated T and B cell responses to α-Gal carrying tick proteins in patients with AGS, which will be essential for the understanding of the immune response against an allergenic carbohydrate transmitted by ticks.
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Affiliation(s)
- Danijela Apostolovic
- Division of Immunology and Allergy, Department of Medicine Solna, Karolinska Institutet and University Hospital, Solna, Sweden
| | - Jeanette Grundström
- Division of Immunology and Allergy, Department of Medicine Solna, Karolinska Institutet and University Hospital, Solna, Sweden
| | - Mensiena B Gea Kiewiet
- Division of Immunology and Allergy, Department of Medicine Solna, Karolinska Institutet and University Hospital, Solna, Sweden
| | - Marija Perusko
- Division of Immunology and Allergy, Department of Medicine Solna, Karolinska Institutet and University Hospital, Solna, Sweden.,Innovative Centre of the Faculty of Chemistry, Belgrade, Serbia
| | - Carl Hamsten
- Division of Immunology and Allergy, Department of Medicine Solna, Karolinska Institutet and University Hospital, Solna, Sweden
| | | | | | - Marianne van Hage
- Division of Immunology and Allergy, Department of Medicine Solna, Karolinska Institutet and University Hospital, Solna, Sweden
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8
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Dramburg S, Hilger C, Santos AF, de Las Vecillas L, Aalberse RC, Acevedo N, Aglas L, Altmann F, Arruda KL, Asero R, Ballmer-Weber B, Barber D, Beyer K, Biedermann T, Bilo MB, Blank S, Bosshard PP, Breiteneder H, Brough HA, Bublin M, Campbell D, Caraballo L, Caubet JC, Celi G, Chapman MD, Chruszcz M, Custovic A, Czolk R, Davies J, Douladiris N, Eberlein B, Ebisawa M, Ehlers A, Eigenmann P, Gadermaier G, Giovannini M, Gomez F, Grohman R, Guillet C, Hafner C, Hamilton RG, Hauser M, Hawranek T, Hoffmann HJ, Holzhauser T, Iizuka T, Jacquet A, Jakob T, Janssen-Weets B, Jappe U, Jutel M, Kalic T, Kamath S, Kespohl S, Kleine-Tebbe J, Knol E, Knulst A, Konradsen JR, Korošec P, Kuehn A, Lack G, Le TM, Lopata A, Luengo O, Mäkelä M, Marra AM, Mills C, Morisset M, Muraro A, Nowak-Wegrzyn A, Nugraha R, Ollert M, Palosuo K, Pastorello EA, Patil SU, Platts-Mills T, Pomés A, Poncet P, Potapova E, Poulsen LK, Radauer C, Radulovic S, Raulf M, Rougé P, Sastre J, Sato S, Scala E, Schmid JM, Schmid-Grendelmeier P, Schrama D, Sénéchal H, Traidl-Hoffmann C, Valverde-Monge M, van Hage M, van Ree R, Verhoeckx K, Vieths S, Wickman M, Zakzuk J, Matricardi PM, Hoffmann-Sommergruber K. EAACI Molecular Allergology User's Guide 2.0. Pediatr Allergy Immunol 2023; 34 Suppl 28:e13854. [PMID: 37186333 DOI: 10.1111/pai.13854] [Citation(s) in RCA: 43] [Impact Index Per Article: 43.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 09/05/2022] [Indexed: 05/17/2023]
Abstract
Since the discovery of immunoglobulin E (IgE) as a mediator of allergic diseases in 1967, our knowledge about the immunological mechanisms of IgE-mediated allergies has remarkably increased. In addition to understanding the immune response and clinical symptoms, allergy diagnosis and management depend strongly on the precise identification of the elicitors of the IgE-mediated allergic reaction. In the past four decades, innovations in bioscience and technology have facilitated the identification and production of well-defined, highly pure molecules for component-resolved diagnosis (CRD), allowing a personalized diagnosis and management of the allergic disease for individual patients. The first edition of the "EAACI Molecular Allergology User's Guide" (MAUG) in 2016 rapidly became a key reference for clinicians, scientists, and interested readers with a background in allergology, immunology, biology, and medicine. Nevertheless, the field of molecular allergology is moving fast, and after 6 years, a new EAACI Taskforce was established to provide an updated document. The Molecular Allergology User's Guide 2.0 summarizes state-of-the-art information on allergen molecules, their clinical relevance, and their application in diagnostic algorithms for clinical practice. It is designed for both, clinicians and scientists, guiding health care professionals through the overwhelming list of different allergen molecules available for testing. Further, it provides diagnostic algorithms on the clinical relevance of allergenic molecules and gives an overview of their biology, the basic mechanisms of test formats, and the application of tests to measure allergen exposure.
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Affiliation(s)
- Stephanie Dramburg
- Department of Pediatric Respiratory Medicine, Immunology and Critical Care Medicine, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Christiane Hilger
- Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg
| | - Alexandra F Santos
- Department of Women and Children's Health (Pediatric Allergy), School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, United Kingdom
- Peter Gorer Department of Immunobiology, School of Immunology and Microbial Sciences, King's College London, London, United Kingdom
- Children's Allergy Service, Evelina London, Guy's and St Thomas' Hospital, London, United Kingdom
| | | | - Rob C Aalberse
- Sanquin Research, Dept Immunopathology, University of Amsterdam, Amsterdam, The Netherlands
- Landsteiner Laboratory, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
| | - Nathalie Acevedo
- Institute for Immunological Research, University of Cartagena, Cartagena de Indias, Colombia, Colombia
| | - Lorenz Aglas
- Department of Biosciences and Medical Biology, Paris Lodron University Salzburg, Salzburg, Austria
| | - Friedrich Altmann
- Department of Chemistry, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Karla L Arruda
- Department of Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Sao Paulo, Brasil, Brazil
| | - Riccardo Asero
- Ambulatorio di Allergologia, Clinica San Carlo, Paderno Dugnano, Italy
| | - Barbara Ballmer-Weber
- Klinik für Dermatologie und Allergologie, Kantonsspital St. Gallen, St. Gallen, Switzerland
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
| | - Domingo Barber
- Institute of Applied Molecular Medicine Nemesio Diez (IMMAND), Department of Basic Medical Sciences, Facultad de Medicina, Universidad San Pablo CEU, CEU Universities, Madrid, Spain
- RETIC ARADyAL and RICORS Enfermedades Inflamatorias (REI), Madrid, Spain
| | - Kirsten Beyer
- Department of Pediatric Respiratory Medicine, Immunology and Critical Care Medicine, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Tilo Biedermann
- Department of Dermatology and Allergy Biederstein, School of Medicine, Technical University Munich, Munich, Germany
| | - Maria Beatrice Bilo
- Department of Clinical and Molecular Sciences, Università Politecnica delle Marche, Ancona, Italy
- Allergy Unit Department of Internal Medicine, University Hospital Ospedali Riuniti di Ancona, Torrette, Italy
| | - Simon Blank
- Center of Allergy and Environment (ZAUM), Technical University of Munich, School of Medicine and Helmholtz Center Munich, German Research Center for Environmental Health, Munich, Germany
| | - Philipp P Bosshard
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
| | - Heimo Breiteneder
- Department of Pathophysiology and Allergy Research, Medical University of Vienna, Vienna, Austria
| | - Helen A Brough
- Department of Women and Children's Health (Pediatric Allergy), School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, United Kingdom
- Children's Allergy Service, Evelina London, Guy's and St Thomas' Hospital, London, United Kingdom
| | - Merima Bublin
- Department of Pathophysiology and Allergy Research, Medical University of Vienna, Vienna, Austria
| | - Dianne Campbell
- Department of Allergy and Immunology, Children's Hospital at Westmead, Sydney Children's Hospitals Network, Sydney, New South Wales, Australia
- Child and Adolescent Health, Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, Australia
| | - Luis Caraballo
- Institute for Immunological Research, University of Cartagena, Cartagena de Indias, Colombia, Colombia
| | - Jean Christoph Caubet
- Pediatric Allergy Unit, Department of Child and Adolescent, University Hospitals of Geneva, Geneva, Switzerland
| | - Giorgio Celi
- Centro DH Allergologia e Immunologia Clinica ASST- MANTOVA (MN), Mantova, Italy
| | | | - Maksymilian Chruszcz
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina, USA
| | - Adnan Custovic
- National Heart and Lung Institute, Imperial College London, London, UK
| | - Rebecca Czolk
- Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg
- Faculty of Science, Technology and Medicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Janet Davies
- Queensland University of Technology, Centre for Immunology and Infection Control, School of Biomedical Sciences, Herston, Queensland, Australia
- Metro North Hospital and Health Service, Emergency Operations Centre, Herston, Queensland, Australia
| | - Nikolaos Douladiris
- Allergy Department, 2nd Paediatric Clinic, National and Kapodistrian University of Athens, Athens, Greece
| | - Bernadette Eberlein
- Department of Dermatology and Allergy Biederstein, School of Medicine, Technical University Munich, Munich, Germany
| | - Motohiro Ebisawa
- Clinical Research Center for Allergy and Rheumatology, National Hospital Organization, Sagamihara National Hospital, Kanagawa, Japan
| | - Anna Ehlers
- Chemical Biology and Drug Discovery, Utrecht University, Utrecht, The Netherlands
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
- Department of Immunology and Dermatology/ Allergology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Philippe Eigenmann
- Pediatric Allergy Unit, Department of Child and Adolescent, University Hospitals of Geneva, Geneva, Switzerland
| | - Gabriele Gadermaier
- Department of Biosciences and Medical Biology, Paris Lodron University Salzburg, Salzburg, Austria
| | - Mattia Giovannini
- Allergy Unit, Department of Pediatrics, Meyer Children's University Hospital, Florence, Italy
| | - Francisca Gomez
- Allergy Unit IBIMA-Hospital Regional Universitario de Malaga, Malaga, Spain
- Spanish Network for Allergy research RETIC ARADyAL, Malaga, Spain
| | - Rebecca Grohman
- NYU Langone Health, Department of Internal Medicine, New York, New York, USA
| | - Carole Guillet
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
- Faculty of Medicine, University of Zurich, Zurich, Switzerland
| | - Christine Hafner
- Department of Dermatology, University Hospital St. Poelten, Karl Landsteiner University of Health Sciences, St. Poelten, Austria
| | - Robert G Hamilton
- Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Michael Hauser
- Department of Biosciences and Medical Biology, Paris Lodron University Salzburg, Salzburg, Austria
| | - Thomas Hawranek
- Department of Dermatology and Allergology, Paracelsus Private Medical University, Salzburg, Austria
| | - Hans Jürgen Hoffmann
- Institute for Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark
- Department of Respiratory Diseases and Allergy, Aarhus University Hospital, Aarhus, Denmark
| | | | - Tomona Iizuka
- Laboratory of Protein Science, Graduate School of Life Science, Hokkaido University, Sapporo, Japan
| | - Alain Jacquet
- Department of Biochemistry, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Thilo Jakob
- Department of Dermatology and Allergology, University Medical Center, Justus Liebig University Gießen, Gießen, Germany
| | - Bente Janssen-Weets
- Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg
- Odense Research Center for Anaphylaxis, University of Southern Denmark, Odense, Denmark
| | - Uta Jappe
- Division of Clinical and Molecular Allergology, Priority Research Area Asthma and Allergy, Research Center Borstel, Borstel, Germany
- Leibniz Lung Center, Airway Research Center North (ARCN), Member of the German Center for Lung Research, Germany
- Interdisciplinary Allergy Outpatient Clinic, Dept. of Pneumology, University of Lübeck, Lübeck, Germany
| | - Marek Jutel
- Department of Clinical Immunology, Wroclaw Medical University, Wroclaw, Poland
| | - Tanja Kalic
- Department of Pathophysiology and Allergy Research, Medical University of Vienna, Vienna, Austria
- Department of Dermatology, University Hospital St. Poelten, Karl Landsteiner University of Health Sciences, St. Poelten, Austria
| | - Sandip Kamath
- Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, Queensland, Australia
- Molecular Allergy Research Laboratory, College of Public Health, Medical and Veterinary Sciences, James Cook University, Townsville, Queensland, Australia
| | - Sabine Kespohl
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr- Universität Bochum, Bochum, Germany
| | - Jörg Kleine-Tebbe
- Allergy & Asthma Center Westend, Outpatient Clinic and Clinical Research Center, Berlin, Germany
| | - Edward Knol
- Department of Immunology and Dermatology/ Allergology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - André Knulst
- Department of Immunology and Dermatology/ Allergology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Jon R Konradsen
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden
- Pediatric Allergy and Pulmonology Unit at Astrid Lindgren Children's Hospital, Karolinska University Hospital, Stockholm, Sweden
| | - Peter Korošec
- University Clinic of Respiratory and Allergic Diseases Golnik, Golnik, Slovenia
- Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia
| | - Annette Kuehn
- Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg
| | - Gideon Lack
- Department of Women and Children's Health (Pediatric Allergy), School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, United Kingdom
- Peter Gorer Department of Immunobiology, School of Immunology and Microbial Sciences, King's College London, London, United Kingdom
- Children's Allergy Service, Evelina London, Guy's and St Thomas' Hospital, London, United Kingdom
| | - Thuy-My Le
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
- Department of Immunology and Dermatology/ Allergology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Andreas Lopata
- Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, Queensland, Australia
- Molecular Allergy Research Laboratory, College of Public Health, Medical and Veterinary Sciences, James Cook University, Townsville, Queensland, Australia
| | - Olga Luengo
- RETIC ARADyAL and RICORS Enfermedades Inflamatorias (REI), Madrid, Spain
- Allergy Section, Internal Medicine Department, Vall d'Hebron University Hospital, Vall d'Hebron Research Institute (VHIR), Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Mika Mäkelä
- Division of Allergy, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
- Pediatric Department, Skin and Allergy Hospital, Helsinki University Central Hospital, Helsinki, Finland
| | | | - Clare Mills
- Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, Manchester Institute of Biotechnology, The University of Manchester, Manchester, UK
| | | | - Antonella Muraro
- Food Allergy Referral Centre, Department of Woman and Child Health, Padua University Hospital, Padua, Italy
| | - Anna Nowak-Wegrzyn
- Division of Pediatric Allergy and Immunology, NYU Grossman School of Medicine, Hassenfeld Children's Hospital, New York, New York, USA
- Department of Pediatrics, Gastroenterology and Nutrition, Collegium Medicum, University of Warmia and Mazury, Olsztyn, Poland
| | - Roni Nugraha
- Molecular Allergy Research Laboratory, College of Public Health, Medical and Veterinary Sciences, James Cook University, Townsville, Queensland, Australia
- Department of Aquatic Product Technology, Faculty of Fisheries and Marine Science, IPB University, Bogor, Indonesia
| | - Markus Ollert
- Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg
- Odense Research Center for Anaphylaxis, University of Southern Denmark, Odense, Denmark
| | - Kati Palosuo
- Department of Allergology, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
| | | | - Sarita Ulhas Patil
- Division of Rheumatology, Allergy and Immunology, Departments of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
- Division of Allergy and Immunology, Department of Pediatrics, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Thomas Platts-Mills
- Division of Allergy and Clinical Immunology, University of Virginia, Charlottesville, Virginia, USA
| | | | - Pascal Poncet
- Institut Pasteur, Immunology Department, Paris, France
- Allergy & Environment Research Team Armand Trousseau Children Hospital, APHP, Paris, France
| | - Ekaterina Potapova
- Department of Pediatric Respiratory Medicine, Immunology and Critical Care Medicine, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Lars K Poulsen
- Allergy Clinic, Department of Dermatology and Allergy, Copenhagen University Hospital-Herlev and Gentofte, Copenhagen, Denmark
| | - Christian Radauer
- Department of Pathophysiology and Allergy Research, Medical University of Vienna, Vienna, Austria
| | - Suzana Radulovic
- Department of Women and Children's Health (Pediatric Allergy), School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, United Kingdom
- Children's Allergy Service, Evelina London, Guy's and St Thomas' Hospital, London, United Kingdom
| | - Monika Raulf
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr- Universität Bochum, Bochum, Germany
| | - Pierre Rougé
- UMR 152 PharmaDev, IRD, Université Paul Sabatier, Faculté de Pharmacie, Toulouse, France
| | - Joaquin Sastre
- Allergy Service, Fundación Jiménez Díaz; CIBER de Enfermedades Respiratorias (CIBERES); Faculty of Medicine, Universidad Autonoma de Madrid, Madrid, Spain
| | - Sakura Sato
- Allergy Department, 2nd Paediatric Clinic, National and Kapodistrian University of Athens, Athens, Greece
| | - Enrico Scala
- Clinical and Laboratory Molecular Allergy Unit - IDI- IRCCS, Fondazione L M Monti Rome, Rome, Italy
| | - Johannes M Schmid
- Department of Respiratory Diseases and Allergy, Aarhus University Hospital, Aarhus, Denmark
| | - Peter Schmid-Grendelmeier
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
- Christine Kühne Center for Allergy Research and Education CK-CARE, Davos, Switzerland
| | - Denise Schrama
- Centre of Marine Sciences (CCMAR), Universidade do Algarve, Faro, Portugal
| | - Hélène Sénéchal
- Allergy & Environment Research Team Armand Trousseau Children Hospital, APHP, Paris, France
| | - Claudia Traidl-Hoffmann
- Christine Kühne Center for Allergy Research and Education CK-CARE, Davos, Switzerland
- Department of Environmental Medicine, Faculty of Medicine, University of Augsburg, Augsburg, Germany
| | - Marcela Valverde-Monge
- Allergy Service, Fundación Jiménez Díaz; CIBER de Enfermedades Respiratorias (CIBERES); Faculty of Medicine, Universidad Autonoma de Madrid, Madrid, Spain
| | - Marianne van Hage
- Department of Medicine Solna, Division of Immunology and Allergy, Karolinska Institutet, Stockholm, Sweden
- Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Ronald van Ree
- Department of Experimental Immunology and Department of Otorhinolaryngology, Amsterdam University Medical Centers, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Kitty Verhoeckx
- Department of Immunology and Dermatology/ Allergology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Stefan Vieths
- Division of Allergology, Paul-Ehrlich-Institut, Langen, Germany
| | - Magnus Wickman
- Department of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Josefina Zakzuk
- Institute for Immunological Research, University of Cartagena, Cartagena de Indias, Colombia, Colombia
| | - Paolo M Matricardi
- Department of Pediatric Respiratory Medicine, Immunology and Critical Care Medicine, Charité Universitätsmedizin Berlin, Berlin, Germany
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9
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Lee CJ, McGill SK. Food Allergies and Alpha-gal Syndrome for the Gastroenterologist. Curr Gastroenterol Rep 2023; 25:21-30. [PMID: 36705797 DOI: 10.1007/s11894-022-00860-7] [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] [Accepted: 12/02/2022] [Indexed: 01/28/2023]
Abstract
PURPOSE OF REVIEW Food allergies are typically not considered as a cause of gastrointestinal (GI) distress without additional allergic symptoms, apart from celiac disease and eosinophilic esophagitis. However, recent reports of patients with alpha-gal syndrome who presented with GI-only symptoms like abdominal pain, vomiting, and diarrhea challenge this paradigm. Alpha-gal syndrome is an IgE-mediated allergy characterized by delayed reactions after eating mammalian meat or mammalian-derived products that contain galactose-alpha-1,3-galactose (alpha-gal). The purpose of this review is to discuss our current understanding of food allergies, GI illness, and the GI manifestations of alpha-gal syndrome. RECENT FINDINGS Among Southeastern U.S. GI clinic patients who screened positive for serum alpha-gal IgE, a majority of patients reported significant symptom improvement on an alpha-gal-avoidant diet, suggesting that the allergy had played a role in their GI symptoms. Diagnosis of alpha-gal syndrome is typically made with concerning allergic symptoms, elevated alpha-gal specific IgE in the serum, and symptom improvement on an alpha-gal avoidant diet. Alpha-gal syndrome can cause a delayed allergic response that is increasingly recognized worldwide, including among patients with predominant GI symptoms.
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Affiliation(s)
- Christopher J Lee
- Department of Internal Medicine, University of North Carolina at Chapel Hill, 130 Mason Farm Road, Chapel Hill, NC, 27514, USA
| | - Sarah K McGill
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of North Carolina at Chapel Hill, 130 Mason Farm Road, Chapel Hill, NC, 27514, USA.
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10
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Lis K, Ukleja-Sokołowska N, Karwowska K, Wernik J, Pawłowska M, Bartuzi Z. The Two-Sided Experimental Model of ImmunoCAP Inhibition Test as a Useful Tool for the Examination of Allergens Cross-Reactivity on the Example of α-Gal and Mammalian Meat Sensitization-A Preliminary Study. Curr Issues Mol Biol 2023; 45:1168-1182. [PMID: 36826022 PMCID: PMC9955645 DOI: 10.3390/cimb45020077] [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: 12/23/2022] [Revised: 01/25/2023] [Accepted: 01/30/2023] [Indexed: 02/04/2023] Open
Abstract
Cross-reactivity of allergens is the cause of various, sometimes unexpected, clinical reactions. There are no standard methods to investigate cross-reactivity. We present an experimental model of a two-sided inhibition test (IT) on ImmunoCAP membranes (CAP). We constructed the described model based on the known cross-allergy syndrome to red meat developing in people bitten by ticks (α-Gal syndrome; AGS). Some individuals who are bitten by ticks develop IgE antibodies specific to the carbohydrate determinant, galactose-α-1,3-galactose (α-Gal), present in the tick's saliva. These antibodies can cross-react with α-Gal molecules expressed on mammalian meat proteins. The well-known property of anti-α-Gal IgE antibodies binding by various sources of this allergen was used by us in the proposed model of the two-sided inhibition test on ImmunoCAP membranes. We expected that anti-α-Gal IgE antibodies bind allergens from mammalian meat and blocking them abolishes this reactivity, and the two-sided inhibition test model we proposed on ImmunoCAP membranes allowed us to observe such a relationship. We conducted the experiment three times on biological material from people with different clinical manifestations of allergy to α-Gal, each time obtaining similar results. In conclusion, the model of bilateral inhibition on ImmunoCAP membranes proposed by us seems to be an attractive, simple tool for direct testing of allergic cross-reactivity.
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Affiliation(s)
- Kinga Lis
- Department of Allergology, Clinical Immunology and Internal Medicine, Ludwik Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, ul. Ujejskiego 75, 85168 Bydgoszcz, Poland
- Correspondence:
| | - Natalia Ukleja-Sokołowska
- Department of Allergology, Clinical Immunology and Internal Medicine, Ludwik Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, ul. Ujejskiego 75, 85168 Bydgoszcz, Poland
| | - Kornelia Karwowska
- Department of Infectious Diseases and Hepatology, Ludwik Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, ul. Świętego Floriana 12, 85030 Bydgoszcz, Poland
| | - Joanna Wernik
- Department of Infectious Diseases and Hepatology, Ludwik Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, ul. Świętego Floriana 12, 85030 Bydgoszcz, Poland
| | - Małgorzata Pawłowska
- Department of Infectious Diseases and Hepatology, Ludwik Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, ul. Świętego Floriana 12, 85030 Bydgoszcz, Poland
| | - Zbigniew Bartuzi
- Department of Allergology, Clinical Immunology and Internal Medicine, Ludwik Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, ul. Ujejskiego 75, 85168 Bydgoszcz, Poland
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11
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Tejan-Kamara AZ, Murhammer JM, Fingert JH. Alpha-gal syndrome (AGS) in a glaucoma suspect with narrow iridocorneal angles. Am J Ophthalmol Case Rep 2023; 29:101811. [PMID: 36798447 PMCID: PMC9926184 DOI: 10.1016/j.ajoc.2023.101811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 01/22/2023] [Accepted: 01/27/2023] [Indexed: 01/29/2023] Open
Abstract
Purpose Alpha-gal syndrome (AGS) is an allergy to non-primate mammalian carbohydrate (galactose-alpha-1,3-galactose) which may cause anaphylaxis. Allergic patients must avoid ophthalmic drugs containing animal-derived ingredients. Observations We report a 59-year-old non-Hispanic white woman who was referred for a glaucoma evaluation. She had been diagnosed with AGS after a tick bite in 2017. Ophthalmic exam revealed potentially occludable, narrow iridocorneal angles and laser iridotomy was recommended. Prior to performing the iridotomy, we investigated the ophthalmic medications required for the procedure to identify options that are free of animal-derived products and safe to use. Laser iridotomy was performed without complications or allergy to medications. Conclusions Ophthalmologists need to be aware of both the presence of AGS as well as the identity of ophthalmic medications that are safe to use in patients with this condition to avoid potentially lethal allergic responses.
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Affiliation(s)
- Aminatta Z. Tejan-Kamara
- Institute for Vision Research, University of Iowa, Iowa City, IA, 52242, USA
- Des Moines University, Des Moines, IA, 50312, USA
| | - Joan M. Murhammer
- Department of Pharmaceutical Care, University of Iowa Health Care, Iowa City, IA, 52242, USA
| | - John H. Fingert
- Institute for Vision Research, University of Iowa, Iowa City, IA, 52242, USA
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA
- Corresponding author. 3111B, Medical Education and Research Facility Carver College of Medicine, University of Iowa Iowa City, IA, 52242, USA.
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12
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Weiler CR, Schrijvers R, Golden DBK. Anaphylaxis: Advances in the Past 10 Years. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY. IN PRACTICE 2023; 11:51-62. [PMID: 36162799 DOI: 10.1016/j.jaip.2022.09.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 09/06/2022] [Accepted: 09/12/2022] [Indexed: 01/11/2023]
Abstract
In the past 10 years, anaphylaxis has grown into its own special area of study within Allergy-Immunology, both at the bench and at the bedside. This review focuses on some of the most clinically relevant advances over the past decade. These include simplified and more inclusive diagnostic criteria for adults and children, uniform definition of biphasic anaphylaxis, and improved systems for objective severity grading. Studies reported in the past decade have led to improved understanding of normal and abnormal regulation of mast cell function, translating into better diagnostic and therapeutic approaches to patients with anaphylaxis. Research has provided improved recognition and treatment of mast cell disorders and has identified a new condition, hereditary α-tryptasemia, that may impact anaphylactic syndromes. We have learned to recognize new causes (α-gal), new pathways (Mas-related G protein-coupled receptor-X2), and many risk factors for severe anaphylaxis. The stability of epinephrine in autoinjectors was reported to be very good for several years after the labeled expiry date, and it can tolerate freezing and thawing. Repeated and prolonged exposure to excessive heat leads to degradation of epinephrine activity. New treatments to prevent severe anaphylaxis have been described, using new ways to block the IgE receptor or modulate intracellular signaling pathways.
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Affiliation(s)
| | - Rik Schrijvers
- Department of Microbiology, Immunology and Transplantation, Allergy and Clinical Immunology Research Group, Leuven, Belgium
| | - David B K Golden
- Division of Allergy/Clinical Immunology, Johns Hopkins School of Medicine, Baltimore, Md.
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13
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Macdougall JD, Thomas KO, Iweala OI. The Meat of the Matter: Understanding and Managing Alpha-Gal Syndrome. Immunotargets Ther 2022; 11:37-54. [PMID: 36134173 PMCID: PMC9484563 DOI: 10.2147/itt.s276872] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 09/02/2022] [Indexed: 11/23/2022] Open
Abstract
Alpha-gal syndrome is an unconventional food allergy, characterized by IgE-mediated hypersensitivity responses to the glycan galactose-alpha-1,3-galactose (alpha-gal) and not to a food-protein. In this review, we discuss how alpha-gal syndrome reframes our current conception of the mechanisms of pathogenesis of food allergy. The development of alpha-gal IgE is associated with tick bites though the possibility of other parasites promoting sensitization to alpha-gal remains. We review the immune cell populations involved in the sensitization and effector phases of alpha-gal syndrome and describe the current understanding of why allergic responses to ingested alpha-gal can be delayed by several hours. We review the foundation of management in alpha-gal syndrome, namely avoidance, but also discuss the use of antihistamines, mast cell stabilizers, and the emerging role of complementary and alternative therapies, biological products, and oral immunotherapy in the management of this condition. Alpha-gal syndrome influences the safety and tolerability of medications and medical devices containing or derived from mammalian products and impacts quality of life well beyond food choices.
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Affiliation(s)
- Jessica D Macdougall
- Department of Medicine, Thurston Arthritis Research Center, Division of Rheumatology, Allergy, and Immunology, Chapel Hill, NC, 27599, USA.,Department of Pediatrics, University of North Carolina Food Allergy Initiative, Division of Allergy and Immunology, University of North Carolina School of Medicine, Chapel Hill, NC, 27599, USA
| | - Kevin O Thomas
- Department of Medicine, Thurston Arthritis Research Center, Division of Rheumatology, Allergy, and Immunology, Chapel Hill, NC, 27599, USA.,Department of Pediatrics, University of North Carolina Food Allergy Initiative, Division of Allergy and Immunology, University of North Carolina School of Medicine, Chapel Hill, NC, 27599, USA
| | - Onyinye I Iweala
- Department of Medicine, Thurston Arthritis Research Center, Division of Rheumatology, Allergy, and Immunology, Chapel Hill, NC, 27599, USA.,Department of Pediatrics, University of North Carolina Food Allergy Initiative, Division of Allergy and Immunology, University of North Carolina School of Medicine, Chapel Hill, NC, 27599, USA
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14
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Kreft L, Schepers A, Hils M, Swiontek K, Flatley A, Janowski R, Mirzaei MK, Dittmar M, Chakrapani N, Desai MS, Eyerich S, Deng L, Niessing D, Fischer K, Feederle R, Blank S, Schmidt-Weber CB, Hilger C, Biedermann T, Ohnmacht C. A novel monoclonal IgG1 antibody specific for Galactose-alpha-1,3-galactose questions alpha-Gal epitope expression by bacteria. Front Immunol 2022; 13:958952. [PMID: 35990627 PMCID: PMC9391071 DOI: 10.3389/fimmu.2022.958952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 07/18/2022] [Indexed: 11/23/2022] Open
Abstract
The alpha-Gal epitope (α-Gal) with the determining element galactose-α1,3-galactose can lead to clinically relevant allergic reactions and rejections in xenotransplantation. These immune reactions can develop because humans are devoid of this carbohydrate due to evolutionary loss of the enzyme α1,3-galactosyltransferase (GGTA1). In addition, up to 1% of human IgG antibodies are directed against α-Gal, but the stimulus for the induction of anti-α-Gal antibodies is still unclear. Commensal bacteria have been suggested as a causal factor for this induction as α-Gal binding tools such as lectins were found to stain cultivated bacteria isolated from the intestinal tract. Currently available tools for the detection of the definite α-Gal epitope, however, are cross-reactive, or have limited affinity and, hence, offer restricted possibilities for application. In this study, we describe a novel monoclonal IgG1 antibody (27H8) specific for the α-Gal epitope. The 27H8 antibody was generated by immunization of Ggta1 knockout mice and displays a high affinity towards synthetic and naturally occurring α-Gal in various applications. Using this novel tool, we found that intestinal bacteria reported to be α-Gal positive cannot be stained with 27H8 questioning whether commensal bacteria express the native α-Gal epitope at all.
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Affiliation(s)
- Luisa Kreft
- Center of Allergy and Environment (ZAUM) and Institute of Allergy Research, Technical University of Munich, School of Medicine, and Helmholtz Center Munich, Research Center for Environmental Health, Neuherberg, Germany
| | - Aloys Schepers
- Monoclonal Antibody Core Facility, Helmholtz Center Munich, German Research Center for Environmental Health, Neuherberg, Germany
| | - Miriam Hils
- Department of Dermatology and Allergy Biederstein, School of Medicine, Technical University of Munich, Munich, Germany
| | - Kyra Swiontek
- Department of Infection and Immunity, Luxembourg Institute of Health (LIH), Esch-sur-Alzette, Luxembourg
| | - Andrew Flatley
- Monoclonal Antibody Core Facility, Helmholtz Center Munich, German Research Center for Environmental Health, Neuherberg, Germany
| | - Robert Janowski
- Institute of Structural Biology, Helmholtz Center Munich, German Research Center for Environmental Health, Neuherberg, Germany
| | - Mohammadali Khan Mirzaei
- Institute of Virology, Technical University of Munich and Helmholtz Center Munich, German Research Center for Environmental Health, Neuherberg, Germany
- Chair of Prevention of Microbial Diseases, School of Life Sciences Weihenstephan, Technical University of Munich, Freising, Germany
| | - Michael Dittmar
- Center of Allergy and Environment (ZAUM) and Institute of Allergy Research, Technical University of Munich, School of Medicine, and Helmholtz Center Munich, Research Center for Environmental Health, Neuherberg, Germany
| | - Neera Chakrapani
- Department of Infection and Immunity, Luxembourg Institute of Health (LIH), Esch-sur-Alzette, Luxembourg
| | - Mahesh S. Desai
- Department of Infection and Immunity, Luxembourg Institute of Health (LIH), Esch-sur-Alzette, Luxembourg
- Odense Research Center for Anaphylaxis, Department of Dermatology and Allergy Center, Odense University Hospital, University of Southern Denmark, Odense, Denmark
| | - Stefanie Eyerich
- Center of Allergy and Environment (ZAUM) and Institute of Allergy Research, Technical University of Munich, School of Medicine, and Helmholtz Center Munich, Research Center for Environmental Health, Neuherberg, Germany
| | - Li Deng
- Institute of Virology, Technical University of Munich and Helmholtz Center Munich, German Research Center for Environmental Health, Neuherberg, Germany
- Chair of Prevention of Microbial Diseases, School of Life Sciences Weihenstephan, Technical University of Munich, Freising, Germany
| | - Dierk Niessing
- Institute of Structural Biology, Helmholtz Center Munich, German Research Center for Environmental Health, Neuherberg, Germany
| | - Konrad Fischer
- Chair of Livestock Biotechnology, School of Life Sciences Weihenstephan, Technical University of Munich, Freising, Germany
| | - Regina Feederle
- Monoclonal Antibody Core Facility, Helmholtz Center Munich, German Research Center for Environmental Health, Neuherberg, Germany
| | - Simon Blank
- Center of Allergy and Environment (ZAUM) and Institute of Allergy Research, Technical University of Munich, School of Medicine, and Helmholtz Center Munich, Research Center for Environmental Health, Neuherberg, Germany
| | - Carsten B. Schmidt-Weber
- Center of Allergy and Environment (ZAUM) and Institute of Allergy Research, Technical University of Munich, School of Medicine, and Helmholtz Center Munich, Research Center for Environmental Health, Neuherberg, Germany
- German Center of Lung Research (DZL), Munich, Germany
| | - Christiane Hilger
- Department of Infection and Immunity, Luxembourg Institute of Health (LIH), Esch-sur-Alzette, Luxembourg
| | - Tilo Biedermann
- Department of Dermatology and Allergy Biederstein, School of Medicine, Technical University of Munich, Munich, Germany
| | - Caspar Ohnmacht
- Center of Allergy and Environment (ZAUM) and Institute of Allergy Research, Technical University of Munich, School of Medicine, and Helmholtz Center Munich, Research Center for Environmental Health, Neuherberg, Germany
- *Correspondence: Caspar Ohnmacht,
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15
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Abstract
Food allergies are relatively prevalent, but mammalian meat allergy remains uncommon and represents an important, potentially acute healthcare risk. This risk is partly because both clinicians and the public lack awareness of this serious allergy, which is unique in three important ways: it incurs a delayed reaction, it is induced by a carbohydrate rather than a protein, and it is linked to tick bites. Although various symptoms are possible, its unique presentation means that mammalian meat allergy is often presented to the dermatologist. We review this challenging subject, which is particularly salient considering the unique connection between ticks and mammalian meat allergy, the expanding tick territory, and the dependency by so many on meat products, not only in the diet but also in medications and medical devices.
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Affiliation(s)
- Rohan Shah
- Department of Dermatology, Rutgers New Jersey Medical School, Newark, NJ, USA.
| | - Robert A Schwartz
- Department of Dermatology, Rutgers New Jersey Medical School, Newark, NJ, USA
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16
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Chakrapani N, Fischer J, Swiontek K, Codreanu-Morel F, Hannachi F, Morisset M, Mugemana C, Bulaev D, Blank S, Bindslev-Jensen C, Biedermann T, Ollert M, Hilger C. α-Gal present on both glycolipids and glycoproteins contributes to immune response in meat-allergic patients. J Allergy Clin Immunol 2022; 150:396-405.e11. [PMID: 35459547 DOI: 10.1016/j.jaci.2022.02.030] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 02/10/2022] [Accepted: 02/21/2022] [Indexed: 10/18/2022]
Abstract
BACKGROUND The α-Gal syndrome is associated with the presence of IgE directed to the carbohydrate galactose-α-1,3-galactose (α-Gal) and is characterized by a delayed allergic reaction occurring 2 to 6 hours after ingestion of mammalian meat. On the basis of their slow digestion and processing kinetics, α-Gal-carrying glycolipids have been proposed as the main trigger of the delayed reaction. OBJECTIVE We analyzed and compared the in vitro allergenicity of α-Gal-carrying glycoproteins and glycolipids from natural food sources. METHODS Proteins and lipids were extracted from pork kidney (PK), beef, and chicken. Glycolipids were purified from rabbit erythrocytes. The presence of α-Gal and IgE binding of α-Gal-allergic patient sera (n = 39) was assessed by thin-layer chromatography as well as by direct and inhibition enzyme-linked immunosorbent assay. The in vitro allergenicity of glycoproteins and glycolipids from different meat extracts was determined by basophil activation test. Glycoprotein stability was evaluated by simulated gastric and intestinal digestion assays. RESULTS α-Gal was detected on glycolipids of PK and beef. Patient IgE antibodies recognized α-Gal bound to glycoproteins and glycolipids, although binding to glycoproteins was more potent. Rabbit glycolipids were able to strongly activate patient basophils, whereas lipid extracts from PK and beef were also found to trigger basophil activation, but at a lower capacity compared to the respective protein extracts. Simulated gastric digestion assays of PK showed a high stability of α-Gal-carrying proteins in PK. CONCLUSION Both α-Gal-carrying glycoproteins and glycolipids are able to strongly activate patient basophils. In PK and beef, α-Gal epitopes seem to be less abundant on glycolipids than on glycoproteins, suggesting a major role of glycoproteins in delayed anaphylaxis upon consumption of these food sources.
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Affiliation(s)
- Neera Chakrapani
- Department of Infection and Immunity, Luxembourg Institute of Health (LIH), Esch-sur-Alzette, Luxembourg; Faculty of Science, Technology and Medicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Jörg Fischer
- Department of Dermatology, Faculty of Medicine, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Kyra Swiontek
- Department of Infection and Immunity, Luxembourg Institute of Health (LIH), Esch-sur-Alzette, Luxembourg
| | | | - Farah Hannachi
- Immunology-Allergology Unit, Centre Hospitalier Luxembourg, Differdange, Luxembourg
| | - Martine Morisset
- Immunology-Allergology Unit, Centre Hospitalier Luxembourg, Differdange, Luxembourg
| | - Clément Mugemana
- Department of Materials Research and Technology, Luxembourg Institute of Science and Technology (LIST), Esch-sur-Alzette, Luxembourg
| | - Dmitry Bulaev
- Competence Center for Methodology and Statistics, LIH, Esch-sur-Alzette, Luxembourg
| | - Simon Blank
- Center of Allergy and Environment (ZAUM), Technical University of Munich, School of Medicine and Helmholtz Center Munich, German Research Center for Environment Health, Member of the Immunology and Inflammation Initiative of the Helmholtz Association, Munich, Germany
| | - Carsten Bindslev-Jensen
- Department of Dermatology and Allergy Center, Odense Research Center for Anaphylaxis, University of Southern Denmark, Odense, Denmark
| | - Tilo Biedermann
- Department of Dermatology and Allergy Biederstein, Technical University of Munich, Munich, Germany
| | - Markus Ollert
- Department of Infection and Immunity, Luxembourg Institute of Health (LIH), Esch-sur-Alzette, Luxembourg; Department of Dermatology and Allergy Center, Odense Research Center for Anaphylaxis, University of Southern Denmark, Odense, Denmark
| | - Christiane Hilger
- Department of Infection and Immunity, Luxembourg Institute of Health (LIH), Esch-sur-Alzette, Luxembourg.
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17
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Abstract
Das Alpha-Gal-Syndrom gehört zu den spannendsten Entdeckungen in der Allergologie der letzten 15 Jahre und wird ausgelöst durch spezifisches Immunglobulin E (sIgE) gegen den für Menschen immunogenen Zucker Galaktose-α‑1,3‑Galaktose (Alpha-Gal). Säugetierfleisch, Milch und daraus hergestellte Nahrungsmittel enthalten Alpha-Gal und können zu Anaphylaxien führen. Auch Arzneimittel und Medizinprodukte aus Säugetiergewebe können allergen sein. Zeckenstiche gelten als Hauptquelle einer Induktion von Alpha-Gal-sIgE. Ziel dieses Beitrags ist es, einen Überblick über den Stand des Wissens zum klinischen Bild und zu pathophysiologischen Konzepten zu geben.
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18
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Román-Carrasco P, Hemmer W, Cabezas-Cruz A, Hodžić A, de la Fuente J, Swoboda I. The α-Gal Syndrome and Potential Mechanisms. FRONTIERS IN ALLERGY 2021; 2:783279. [PMID: 35386980 PMCID: PMC8974695 DOI: 10.3389/falgy.2021.783279] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Accepted: 11/08/2021] [Indexed: 12/17/2022] Open
Abstract
The α-Gal syndrome is a complex allergic disease characterized by the development of specific IgE antibodies against the carbohydrate galactose-α-1,3-galactose (α-Gal), an oligosaccharide present in cells and tissues of non-primate mammals. Individuals with IgE antibodies to α-Gal suffer from a delayed form of anaphylaxis following red meat consumption. There are several features that make the α-Gal syndrome such a unique allergic disease and distinguish it from other food allergies: (1) symptoms causing IgE antibodies are directed against a carbohydrate moiety, (2) the unusual delay between the consumption of the food and the onset of the symptoms, and (3) the fact that primary sensitization to α-Gal occurs via tick bites. This review takes a closer look at the immune response against α-Gal, in healthy and in α-Gal allergic individuals. Furthermore, the similarities and differences between immune response against α-Gal and against the other important glycan moieties associated with allergies, namely cross-reactive carbohydrate determinants (CCDs), are discussed. Then different mechanisms are discussed that could contribute to the delayed onset of symptoms after consumption of mammalian meat. Moreover, our current knowledge on the role of tick bites in the sensitization process is summarized. The tick saliva has been shown to contain proteins carrying α-Gal, but also bioactive molecules, such as prostaglandin E2, which is capable of stimulating an increased expression of anti-inflammatory cytokines while promoting a decrease in the production of proinflammatory mediators. Together these components might promote Th2-related immunity and trigger a class switch to IgE antibodies directed against the oligosaccharide α-Gal. The review also points to open research questions that remain to be answered and proposes future research directions, which will help to get a better understanding and lead to a better management of the disease.
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Affiliation(s)
- Patricia Román-Carrasco
- Molecular Biotechnology Section, FH Campus Wien, University of Applied Sciences, Vienna, Austria
| | | | - Alejandro Cabezas-Cruz
- Anses, INRAE, Ecole Nationale Vétérinaire d'Alfort, UMR BIPAR, Laboratoire de Santé Animale, Maisons-Alfort, France
| | - Adnan Hodžić
- Department of Pathobiology, Institute of Parasitology, University of Veterinary Medicine Vienna, Vienna, Austria
| | - José de la Fuente
- SaBio, Instituto de Investigación de Recursos Cinegéticos, IREC-CSIC-UCLM-JCCM, Ciudad Real, Spain
- Department of Veterinary Pathobiology, Center for Veterinary Health Sciences, Oklahoma State University, Stillwater, OK, United States
| | - Ines Swoboda
- Molecular Biotechnology Section, FH Campus Wien, University of Applied Sciences, Vienna, Austria
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19
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Sharma SR, Crispell G, Mohamed A, Cox C, Lange J, Choudhary S, Commins SP, Karim S. Alpha-Gal Syndrome: Involvement of Amblyomma americanum α-D-Galactosidase and β-1,4 Galactosyltransferase Enzymes in α-Gal Metabolism. Front Cell Infect Microbiol 2021; 11:775371. [PMID: 34926322 PMCID: PMC8671611 DOI: 10.3389/fcimb.2021.775371] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 10/27/2021] [Indexed: 11/16/2022] Open
Abstract
Alpha-Gal Syndrome (AGS) is an IgE-mediated delayed-type hypersensitivity reaction to the oligosaccharide galactose-α-1, 3-galactose (α-gal) injected into humans from the lone-star tick (Amblyomma americanum) bite. Indeed, α-gal is discovered in salivary glands of lone-star tick; however, the tick's specific intrinsic factors involved in endogenous α-gal production and presentation to host during hematophagy are poorly understood. This study aimed to investigate the functional role of two tick enzymes, α-D-galactosidase (ADGal) and β-1,4 galactosyltransferases (β-1,4GalT), in endogenous α-gal production, carbohydrate metabolism, and N-glycan profile in lone-star tick. The ADGal enzyme cleaves terminal α-galactose moieties from glycoproteins and glycolipids, whereas β-1,4GalT transfers α-galactose to a β1,4 terminal linkage acceptor sugars-GlcNAc, Glc, and Xyl-in various processes of glycoconjugate synthesis. An RNA interference approach was utilized to silence ADGal and β-1,4GalT in Am. americanum to examine their function in α-gal metabolism in tick and AGS onset. Silencing of ADGal led to the significant downregulation of genes involved in galactose metabolism and transport in Am. americanum. Immunoblot and N-glycan analysis of the Am. americanum salivary glands showed a significant reduction in α-gal levels in silenced tissues. However, there was no significant difference in the level of α-gal in β-1,4GalT-silenced tick salivary glands. A basophil-activation test showed a decrease in the frequency of activated basophil by ADGal-silenced salivary glands. These results provide an insight into the roles of ADGal and β-1,4GalT in α-gal production and presentation in ticks and the probable involvement in the onset of AGS.
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Affiliation(s)
- Surendra Raj Sharma
- School of Biological, Environment and Earth Sciences, The University of Southern Mississippi, Hattiesburg, MS, United States
| | - Gary Crispell
- School of Biological, Environment and Earth Sciences, The University of Southern Mississippi, Hattiesburg, MS, United States
| | - Ahmed Mohamed
- School of Biological, Environment and Earth Sciences, The University of Southern Mississippi, Hattiesburg, MS, United States
| | - Cameron Cox
- School of Biological, Environment and Earth Sciences, The University of Southern Mississippi, Hattiesburg, MS, United States
| | - Joshua Lange
- School of Biological, Environment and Earth Sciences, The University of Southern Mississippi, Hattiesburg, MS, United States
| | - Shailesh Choudhary
- Department of Medicine and Pediatrics, University of North Carolina, Chapel Hill, NC, United States
| | - Scott P. Commins
- Department of Medicine and Pediatrics, University of North Carolina, Chapel Hill, NC, United States
| | - Shahid Karim
- School of Biological, Environment and Earth Sciences, The University of Southern Mississippi, Hattiesburg, MS, United States
- Center for Molecular and Cellular Biosciences, The University of Southern Mississippi, Hattiesburg, MS, United States
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20
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Perusko M, Apostolovic D, Kiewiet MBG, Grundström J, Hamsten C, Starkhammar M, Cirkovic Velickovic T, Hage M. Bovine γ-globulin, lactoferrin, and lactoperoxidase are relevant bovine milk allergens in patients with α-Gal syndrome. Allergy 2021; 76:3766-3775. [PMID: 33938008 DOI: 10.1111/all.14889] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 03/29/2021] [Accepted: 04/07/2021] [Indexed: 12/11/2022]
Abstract
BACKGROUND Mammalian meat is the most common trigger of the allergic reactions in patients with α-Gal syndrome (AGS). Milk and dairy, although less often, also cause a significant number of allergic manifestations. The aim of this study was to identify α-Gal-containing bovine milk proteins with allergenic properties among AGS patients. METHODS Thirty-eight AGS patients with IgE to milk were included in the study. Milk proteins were analyzed for the presence of α-Gal and for binding by patients' IgE using immunoblot, ImmunoCAP, and inhibition ELISA. Allergenicity of milk and milk proteins was assessed by basophil activation test. RESULTS More than half of the AGS patients reported allergic reactions to milk or dairy products. Bovine γ-globulin (BGG), lactoferrin (LF), and lactoperoxidase (LPO) were identified as α-Gal carrying proteins which were recognized by AGS patients' IgE. Whey mirrored the anti-α-Gal and IgE reactivity of BGG, LF, and LPO. Eighty-nine percent of the patients displayed IgE to BGG, 91% to LF, and 57% to LPO. Inhibition of α-Gal-specific IgE binding was achieved by BGG, LF, LPO, and whey. These proteins also activated AGS patients' basophils. Interestingly, at lower concentrations, LF was the most potent inhibitor of IgE binding, and the most potent activator of basophils. CONCLUSION BGG, LF, and LPO were all found to be relevant milk α-Gal-containing glycoproteins that bound AGS patients' IgE antibodies and activated their basophils. These proteins are probably involved in the allergic reactions to milk in AGS patients. LPO was for the first time shown to be an allergen.
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Affiliation(s)
- Marija Perusko
- Division of Immunology and Allergy Department of Medicine Solna Karolinska Institutet and Karolinska University Hospital Stockholm Sweden
- Innovative Centre Faculty of Chemistry Belgrade Serbia
| | - Danijela Apostolovic
- Division of Immunology and Allergy Department of Medicine Solna Karolinska Institutet and Karolinska University Hospital Stockholm Sweden
| | - Mensiena Berentje Geertje Kiewiet
- Division of Immunology and Allergy Department of Medicine Solna Karolinska Institutet and Karolinska University Hospital Stockholm Sweden
| | - Jeanette Grundström
- Division of Immunology and Allergy Department of Medicine Solna Karolinska Institutet and Karolinska University Hospital Stockholm Sweden
| | - Carl Hamsten
- Division of Immunology and Allergy Department of Medicine Solna Karolinska Institutet and Karolinska University Hospital Stockholm Sweden
| | | | - Tanja Cirkovic Velickovic
- Department of Biochemistry Center of Excellence for Molecular Food Sciences University of Belgrade‐Faculty of Chemistry Belgrade Serbia
- Faculty of Bioscience Engineering Ghent University Ghent Belgium
- Ghent University Global Campus Yeonsu‐Gu, Incheon South Korea
- Serbian Academy of Sciences and Arts Belgrade Serbia
| | - Marianne Hage
- Division of Immunology and Allergy Department of Medicine Solna Karolinska Institutet and Karolinska University Hospital Stockholm Sweden
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21
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Eller E, Stahl Skov P, Baumann K, Hilger C, Ollert M, Bindslev-Jensen C. Delayed reaction in alpha-gal allergy is reflected in serum levels after ingestion of pork kidney, and absorption is dependent on food processing. Clin Exp Allergy 2021; 52:197-200. [PMID: 34779547 DOI: 10.1111/cea.14054] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Revised: 11/09/2021] [Accepted: 11/12/2021] [Indexed: 12/15/2022]
Affiliation(s)
- Esben Eller
- Department of Dermatology & Allergy Center, Odense Research Center for Anaphylaxis (ORCA), Odense University Hospital, Odense, Denmark
| | - Per Stahl Skov
- Department of Dermatology & Allergy Center, Odense Research Center for Anaphylaxis (ORCA), Odense University Hospital, Odense, Denmark.,RefLab ApS, Copenhagen, Denmark
| | - Katrine Baumann
- RefLab ApS, Copenhagen, Denmark.,Department of Immunology and Microbiology, LEO Foundation Skin Immunology Research Center, University of Copenhagen, Copenhagen, Denmark
| | - Christiane Hilger
- Department of Infection and Immunity, Luxembourg Institute of Health (LIH), Esch-sur-Alzette, Luxembourg
| | - Markus Ollert
- Department of Dermatology & Allergy Center, Odense Research Center for Anaphylaxis (ORCA), Odense University Hospital, Odense, Denmark.,Department of Infection and Immunity, Luxembourg Institute of Health (LIH), Esch-sur-Alzette, Luxembourg
| | - Carsten Bindslev-Jensen
- Department of Dermatology & Allergy Center, Odense Research Center for Anaphylaxis (ORCA), Odense University Hospital, Odense, Denmark
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22
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Prakash PS, Weber MHW, van Hellemond JJ, Falcone FH. Are humanized IgE reporter systems potential game changers in serological diagnosis of human parasitic infection? Parasitol Res 2021; 121:1137-1144. [PMID: 34767081 PMCID: PMC8986668 DOI: 10.1007/s00436-021-07352-z] [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: 07/26/2021] [Accepted: 10/16/2021] [Indexed: 12/01/2022]
Abstract
Immunoglobulin E (IgE) is thought to have evolved to protect mammalian hosts against parasitic infections or toxins and plays a central role in the pathogenesis, diagnosis, and therapy of IgE-mediated allergy. Despite the prominence of IgE responses in most parasitic infections, and in stark contrast to its use in the diagnosis of allergy, this isotype is almost completely unexploited for parasite diagnosis. Here, we discuss the perceived or real limitations of IgE-based diagnosis in parasitology and suggest that the recent creation of a new generation of very sensitive cellular IgE-based reporters may represent a powerful new diagnostic platform, but needs to be based on a very careful choice of diagnostic allergens.
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Affiliation(s)
- Prema S Prakash
- Biomedical Research Centre Seltersberg (BFS), Institute for Parasitology, Justus Liebig University Giessen, Giessen, Germany
| | - Michael H W Weber
- Biomedical Research Centre Seltersberg (BFS), Institute for Parasitology, Justus Liebig University Giessen, Giessen, Germany
| | - Jaap J van Hellemond
- Department of Medical Microbiology and Infectious Diseases, Erasmus MC University Medical Center, Rotterdam, The Netherlands
| | - Franco H Falcone
- Biomedical Research Centre Seltersberg (BFS), Institute for Parasitology, Justus Liebig University Giessen, Giessen, Germany.
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23
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Platts‐Mills TA, Hilger C, Jappe U, van Hage M, Gadermaier G, Spillner E, Lidholm J, Keshavarz B, Aalberse RC, van Ree R, Goodman RE, Pomés A. Carbohydrate epitopes currently recognized as targets for IgE antibodies. Allergy 2021; 76:2383-2394. [PMID: 33655520 DOI: 10.1111/all.14802] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 02/17/2021] [Accepted: 02/26/2021] [Indexed: 12/11/2022]
Abstract
Until recently, glycan epitopes have not been documented by the WHO/IUIS Allergen Nomenclature Sub-Committee. This was in part due to scarce or incomplete information on these oligosaccharides, but also due to the widely held opinion that IgE to these epitopes had little or no relevance to allergic symptoms. Most IgE-binding glycans recognized up to 2008 were considered to be "classical" cross-reactive carbohydrate determinants (CCD) that occur in insects, some helminths and throughout the plant kingdom. Since 2008, the prevailing opinion on lack of clinical relevance of IgE-binding glycans has been subject to a reevaluation. This was because IgE specific for the mammalian disaccharide galactose-alpha-1,3-galactose (alpha-gal) was identified as a cause of delayed anaphylaxis to mammalian meat in the United States, an observation that has been confirmed by allergists in many parts of the world. Several experimental studies have shown that oligosaccharides with one or more terminal alpha-gal epitopes can be attached as a hapten to many different mammalian proteins or lipids. The classical CCDs also behave like haptens since they can be expressed on proteins from multiple species. This is the explanation for extensive in vitro cross-reactivity related to CCDs. Because of these developments, the Allergen Nomenclature Sub-Committee recently decided to include glycans as potentially allergenic epitopes in an adjunct section of its website (www.allergen.org). In this article, the features of the main glycan groups known to be involved in IgE recognition are revisited, and their characteristic structural, functional, and clinical features are discussed.
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Affiliation(s)
- Thomas A. Platts‐Mills
- WHO/IUIS Allergen Nomenclature Sub‐Committee
- Division of Allergy and Immunology University of Virginia Charlottesville Virginia USA
| | - Christiane Hilger
- WHO/IUIS Allergen Nomenclature Sub‐Committee
- Department of Infection and Immunity Luxembourg Institute of Health Esch‐sur‐Alzette Luxembourg
| | - Uta Jappe
- WHO/IUIS Allergen Nomenclature Sub‐Committee
- Division of Clinical and Molecular Allergology, Research Center Borstel AirwayResearch Center North (ARCN)German Center for Lung Research Borstel Germany
- Interdisciplinary Allergy Outpatient Clinic, Department of Internal Medicine and Pneumology University of Lübeck Lübeck Germany
| | - Marianne van Hage
- WHO/IUIS Allergen Nomenclature Sub‐Committee
- Department of Medicine Solna, Division of Immunology and Allergy Karolinska Institutet & Karolinska University Hospital Stockholm Sweden
| | - Gabriele Gadermaier
- WHO/IUIS Allergen Nomenclature Sub‐Committee
- Department of Biosciences Paris Lodron University of Salzburg Salzburg Austria
| | - Edzard Spillner
- WHO/IUIS Allergen Nomenclature Sub‐Committee
- Department of Biological and Chemical Engineering Aarhus University Denmark
| | - Jonas Lidholm
- WHO/IUIS Allergen Nomenclature Sub‐Committee
- Thermo Fisher Scientific Uppsala Sweden
| | - Behnam Keshavarz
- Division of Allergy and Immunology University of Virginia Charlottesville Virginia USA
| | - Rob C. Aalberse
- Department of Immunopathology Sanquin Amsterdam The Netherlands
| | - Ronald van Ree
- WHO/IUIS Allergen Nomenclature Sub‐Committee
- Departments of Experimental Immunology and of Otorhinolaryngology Amsterdam University Medical Centers, Academic Medical Center Amsterdam The Netherlands
| | - Richard E. Goodman
- WHO/IUIS Allergen Nomenclature Sub‐Committee
- Food Allergy Research & Resource Program University of Nebraska Lincoln Nebraska USA
| | - Anna Pomés
- WHO/IUIS Allergen Nomenclature Sub‐Committee
- Basic Research, Indoor Biotechnologies, Inc. Charlottesville Virginia USA
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24
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Sharma SR, Karim S. Tick Saliva and the Alpha-Gal Syndrome: Finding a Needle in a Haystack. Front Cell Infect Microbiol 2021; 11:680264. [PMID: 34354960 PMCID: PMC8331069 DOI: 10.3389/fcimb.2021.680264] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Accepted: 06/29/2021] [Indexed: 01/01/2023] Open
Abstract
Ticks and tick-borne diseases are significant public health concerns. Bioactive molecules in tick saliva facilitate prolonged blood-feeding and transmission of tick-borne pathogens to the vertebrate host. Alpha-gal syndrome (AGS), a newly reported food allergy, is believed to be induced by saliva proteins decorated with a sugar molecule, the oligosaccharide galactose-⍺-1,3-galactose (α-gal). This syndrome is characterized by an IgE antibody-directed hypersensitivity against α-gal. The α-gal antigen was discovered in the salivary glands and saliva of various tick species including, the Lone Star tick (Amblyomma americanum). The underlying immune mechanisms linking tick bites with α-gal-specific IgE production are poorly understood and are crucial to identify and establish novel treatments for this disease. This article reviews the current understanding of AGS and its involvement with tick species.
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Affiliation(s)
- Surendra Raj Sharma
- Center for Molecular and Cellular Biology, School of Biological, Environmental, and Earth Sciences, University of Southern Mississippi, Hattiesburg, MS, United States
| | - Shahid Karim
- Center for Molecular and Cellular Biology, School of Biological, Environmental, and Earth Sciences, University of Southern Mississippi, Hattiesburg, MS, United States
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25
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Choudhary SK, Karim S, Iweala OI, Choudhary S, Crispell G, Sharma SR, Addison CT, Kulis M, Herrin BH, Little SE, Commins SP. Tick salivary gland extract induces alpha-gal syndrome in alpha-gal deficient mice. IMMUNITY INFLAMMATION AND DISEASE 2021; 9:984-990. [PMID: 34034363 PMCID: PMC8342229 DOI: 10.1002/iid3.457] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 02/08/2021] [Accepted: 03/15/2021] [Indexed: 12/29/2022]
Abstract
Introduction Alpha‐gal syndrome (AGS) is characterized by delayed hypersensitivity to non‐primate mammalian meat in people having specific immunoglobulin E (sIgE) to the oligosaccharide galactose‐alpha‐1,3‐galactose. AGS has been linked to tick bites from Amblyomma americanum (Aa) in the U.S. A small animal model of meat allergy is needed to study the mechanism of alpha‐gal sensitization, the effector phase leading to delayed allergic responses and potential therapeutics to treat AGS. Methods Eight‐ to ten‐weeks old mice with a targeted inactivation of alpha‐1,3‐galactosyltransferase (AGKO) were injected intradermally with 50 μg of Aa tick salivary gland extract (TSGE) on days 0, 7, 21, 28, 42, and 49. Total IgE and alpha‐gal sIgE were quantitated on Day 56 by enzyme‐linked immunosorbent assay. Mice were challenged orally with 400 mg of cooked pork kidney homogenate or pork fat. Reaction severity was assessed by measuring a drop in core body temperature and scoring allergic signs. Results Compared to control animals, mice treated with TSGE had 190‐fold higher total IgE on Day 56 (0.60 ± 0.12 ng/ml vs. 113.2 ± 24.77 ng/ml; p < 0.001). Alpha‐gal sIgE was also produced in AGKO mice following TSGE sensitization (undetected vs. 158.4 ± 72.43 pg/ml). Further, sensitized mice displayed moderate clinical allergic signs along with a drop in core body temperature of ≥2°C as an objective measure of a systemic allergic reaction. Interestingly, female mice had higher total IgE responses to TSGE treatment but male mice had larger declines in mean body temperature. Conclusion TSGE‐sensitized AGKO mice generate sIgE to alpha‐gal and demonstrate characteristic allergic responses to pork fat and pork kidney. In keeping with the AGS responses documented in humans, mice reacted more rapidly to organ meat than to high fat pork challenge. This mouse model establishes the central role of tick bites in the development of AGS and provides a small animal model to mechanistically study mammalian meat allergy.
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Affiliation(s)
- Shailesh K Choudhary
- Division of Allergy, Immunology and Rheumatology, Thurston Arthritis Research Center, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Shahid Karim
- Center for Molecular and Cellular Biosciences, Department of Cell and Molecular Biology, School of Biological, Environmental, and Earth Sciences, The University of Southern Mississippi, Hattiesburg, Mississippi, USA
| | - Onyinye I Iweala
- Division of Allergy, Immunology and Rheumatology, Thurston Arthritis Research Center, University of North Carolina, Chapel Hill, North Carolina, USA.,UNC Food Allergy Initiative, Department of Pediatrics, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Shivangi Choudhary
- Division of Allergy, Immunology and Rheumatology, Thurston Arthritis Research Center, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Gary Crispell
- Center for Molecular and Cellular Biosciences, Department of Cell and Molecular Biology, School of Biological, Environmental, and Earth Sciences, The University of Southern Mississippi, Hattiesburg, Mississippi, USA
| | - Surendra Raj Sharma
- Center for Molecular and Cellular Biosciences, Department of Cell and Molecular Biology, School of Biological, Environmental, and Earth Sciences, The University of Southern Mississippi, Hattiesburg, Mississippi, USA
| | - Claire T Addison
- Division of Allergy, Immunology and Rheumatology, Thurston Arthritis Research Center, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Mike Kulis
- UNC Food Allergy Initiative, Department of Pediatrics, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Brian H Herrin
- Department of Diagnostic Medicine and Pathobiology, Kansas State University, Manhattan, Kansas, USA
| | - Susan E Little
- Department of Veterinary Pathobiology, Oklahoma State University, Stillwater, Oklahoma, USA
| | - Scott P Commins
- Division of Allergy, Immunology and Rheumatology, Thurston Arthritis Research Center, University of North Carolina, Chapel Hill, North Carolina, USA.,UNC Food Allergy Initiative, Department of Pediatrics, University of North Carolina, Chapel Hill, North Carolina, USA
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Tick-human interactions: from allergic klendusity to the α-Gal syndrome. Biochem J 2021; 478:1783-1794. [PMID: 33988703 DOI: 10.1042/bcj20200915] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Revised: 04/06/2021] [Accepted: 04/21/2021] [Indexed: 11/17/2022]
Abstract
Ticks and the pathogens they transmit, including bacteria, viruses, protozoa, and helminths, constitute a growing burden for human and animal health worldwide. The ability of some animal species to acquire resistance to blood-feeding by ticks after a single or repeated infestation is known as acquired tick resistance (ATR). This resistance has been associated to tick-specific IgE response, the generation of skin-resident memory CD4+ T cells, basophil recruitment, histamine release, and epidermal hyperplasia. ATR has also been associated with protection to tick-borne tularemia through allergic klendusity, a disease-escaping ability produced by the development of hypersensitivity to an allergen. In addition to pathogen transmission, tick infestation in humans is associated with the α-Gal syndrome (AGS), a type of allergy characterized by an IgE response against the carbohydrate Galα1-3Gal (α-Gal). This glycan is present in tick salivary proteins and on the surface of tick-borne pathogens such as Borrelia burgdorferi and Anaplasma phagocytophilum, the causative agents of Lyme disease and granulocytic anaplasmosis. Most α-Gal-sensitized individuals develop IgE specific against this glycan, but only a small fraction develop the AGS. This review summarizes our current understanding of ATR and its impact on the continuum α-Gal sensitization, allergy, and the AGS. We propose that the α-Gal-specific IgE response in humans is an evolutionary adaptation associated with ATR and allergic klendusity with the trade-off of developing AGS.
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Abstract
PURPOSE OF REVIEW Alpha-gal syndrome encompasses a constellation of symptoms associated with immune-mediated hypersensitivity responses to galactose-alpha-1,3-galactose (alpha-gal). The purpose of this review is to discuss our current understanding of the etiology, clinical symptoms, natural history, epidemiology, and management of alpha-gal syndrome. RECENT FINDINGS Sensitization to alpha-gal is associated with bites from ectoparasites like the lone star tick Amblyomma americanum. Allergic reactions in alpha-gal syndrome are often delayed and inconsistent. The magnitude of the allergic response depends on co-factors like exercise and alcohol consumption and the amount of alpha-gal and fat present in the food. Assaying alpha-gal-specific IgE in the serum is the primary diagnostic test used to confirm the allergy. Long-term management of the condition involves avoidance of both mammalian food products and tick bites. SUMMARY Alpha-gal syndrome disrupts the current paradigm for understanding food allergy. Exposure to an ectoparasite is critical for the development of specific IgE antibodies underlying sensitization, and allergic reactions depend on the activation of mast cells and basophils sensitized with IgE against a carbohydrate rather than a protein. Research in this field may lead to the development of improved diagnostic and therapeutic tools that can revolutionize the management of patients with alpha-gal syndrome.
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Hils M, Wölbing F, Hilger C, Fischer J, Hoffard N, Biedermann T. The History of Carbohydrates in Type I Allergy. Front Immunol 2020; 11:586924. [PMID: 33163001 PMCID: PMC7583601 DOI: 10.3389/fimmu.2020.586924] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 09/07/2020] [Indexed: 12/20/2022] Open
Abstract
Although first described decades ago, the relevance of carbohydrate specific antibodies as mediators of type I allergy had not been recognized until recently. Previously, allergen specific IgE antibodies binding to carbohydrate epitopes were considered to demonstrate a clinically irrelevant cross-reactivity. However, this changed following the discovery of type I allergies specifically mediated by oligosaccharide structures. Especially the emerging understanding of red meat allergy characterized by IgE directed to the oligosaccharide alpha-gal showed that carbohydrate-mediated reactions can result in life threatening systemic anaphylaxis which in contrast to former assumptions proves a high clinical relevance of some carbohydrate allergens. Within the scope of this review article, we illustrate the historical development of carbohydrate-allergen-research, reaching from only diagnostically relevant crossreactive-carbohydrate-determinants to clinically important antigens mediating type I allergy. Focusing on clinical and immunological features of the alpha-gal syndrome, we highlight the discovery of oligosaccharides as potentially highly immunogenic antigens and mediators of type I allergy, report what is known about the route of sensitization and the immunological mechanisms involved in sensitization and elicitation phase of allergic responses as well as currently available diagnostic and therapeutic tools. Finally, we briefly report on carbohydrates being involved in type I allergies different from alpha-gal.
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Affiliation(s)
- Miriam Hils
- Department of Dermatology and Allergy Biederstein, School of Medicine, Technical University of Munich, Munich, Germany
| | - Florian Wölbing
- Department of Dermatology and Allergy Biederstein, School of Medicine, Technical University of Munich, Munich, Germany
| | - Christiane Hilger
- Department of Infection and Immunity, Luxembourg Institute of Health (LIH), Esch-sur-Alzette, Luxembourg
| | - Jörg Fischer
- Department of Dermatology, Faculty of Medicine, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Nils Hoffard
- Department of Dermatology and Allergy Biederstein, School of Medicine, Technical University of Munich, Munich, Germany
| | - Tilo Biedermann
- Department of Dermatology and Allergy Biederstein, School of Medicine, Technical University of Munich, Munich, Germany.,Clinical Unit Allergology, Helmholtz Zentrum München, German Research Center for Environmental 10 Health GmbH, Neuherberg, Germany
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Anzani C, Boukid F, Drummond L, Mullen AM, Álvarez C. Optimising the use of proteins from rich meat co-products and non-meat alternatives: Nutritional, technological and allergenicity challenges. Food Res Int 2020; 137:109575. [PMID: 33233187 DOI: 10.1016/j.foodres.2020.109575] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 07/15/2020] [Accepted: 07/17/2020] [Indexed: 12/27/2022]
Abstract
An exponential growth in the global demand for high quality proteins over the next 20 years is expected, mainly due to global population growth and the increasing awareness toward protein rich foods for more nutritive diets. Coupled with this, is the pressing need for more sustainable approaches within a bio-economy mindset. Although meat production is expected to increase to address this rising demand, a better use of the currently available resources provided by the food, and specially, the meat industry is required. In this regard, despite the high-quality proteins and other nutrients found in meat co-products; they are currently underused and their valorisation needs to be revisited. Also, emerging protein sources need to be investigated to alleviate the environmental pressure coming from the meat industry. In this review, the main focus was attributed to (i) the current and forthcoming challenges for the use of meat co-products as meat replacers to produce a new range of meat derived products (with high nutritional value, improved technological properties and better consumer acceptance); (ii) their performance regarding to the non-animal origin proteins currently used as meat protein replacers; and (iii) the allergenicity of the proteins that might fall into the category of novel protein sources.
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Affiliation(s)
- Cecilia Anzani
- Ashtown Teagasc Food Research Centre, Dept. of Sensory Science and Food Quality, Dublin 15, Ireland
| | - Fatma Boukid
- Food and Drug Department, University of Parma, via Parco Area delle Scienze 49/a, 43124 Parma, Italy
| | - Liana Drummond
- Ashtown Teagasc Food Research Centre, Dept. of Sensory Science and Food Quality, Dublin 15, Ireland
| | - Anne Maria Mullen
- Ashtown Teagasc Food Research Centre, Dept. of Sensory Science and Food Quality, Dublin 15, Ireland
| | - Carlos Álvarez
- Ashtown Teagasc Food Research Centre, Dept. of Sensory Science and Food Quality, Dublin 15, Ireland.
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30
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Rutkowski K, Wagner A, Rutkowski R, Sowa P, Pancewicz S, Moniuszko-Malinowska A. Alpha-gal syndrome: An emerging cause of food and drug allergy. Clin Exp Allergy 2020; 50:894-903. [PMID: 32542789 DOI: 10.1111/cea.13683] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Revised: 06/02/2020] [Accepted: 06/08/2020] [Indexed: 12/14/2022]
Abstract
Alpha-gal syndrome (AGS) describes a wide spectrum of hypersensitivity reactions mediated by specific IgE to the α-gal epitope (galactose-α-1,3-galactose) ubiquitously expressed on glycolipids/glycoproteins of most mammals. This fascinating new entity has completely changed the paradigms of allergy as allergic response is directed against an oligosaccharide and the reactions can be both immediate and delayed. They appear to be stimulated only by tick bites which induce production of α-gal specific IgE antibodies that lead to (at times fatal) hypersensitivity response. AGS is completely different to previously described anaphylaxis to tick saliva. It provides unique insight into the interplay between different arms of the immune system and the role of ectoparasites in the development of anaphylaxis to food and medication in patients at risk of tick bites including travellers. This review summarises recent advances in our understanding of its clinical presentation, pathomechanism and role of various tick species in the development of AGS.
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Affiliation(s)
| | - Annette Wagner
- Department of Adult Allergy, Guy's and St Thomas' Hospital, London, UK
| | - Ryszard Rutkowski
- Department of Respiratory Diagnostics and Bronchoscopy, Medical University of Bialystok, Bialystok, Poland
| | - Paweł Sowa
- Department of Population Medicine and Civilization Diseases Prevention, Medical University of Bialystok, Bialystok, Poland
| | - Sławomir Pancewicz
- Department of Infectious Diseases and Neuroinfections, Medical University of Bialystok, Bialystok, Poland
| | - Anna Moniuszko-Malinowska
- Department of Infectious Diseases and Neuroinfections, Medical University of Bialystok, Bialystok, Poland
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31
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A WAO - ARIA - GA 2LEN consensus document on molecular-based allergy diagnosis (PAMD@): Update 2020. World Allergy Organ J 2020; 13:100091. [PMID: 32180890 PMCID: PMC7062937 DOI: 10.1016/j.waojou.2019.100091] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Precision allergy molecular diagnostic applications (PAMD@) is increasingly entering routine care. Currently, more than 130 allergenic molecules from more than 50 allergy sources are commercially available for in vitro specific immunoglobulin E (sIgE) testing. Since the last publication of this consensus document, a great deal of new information has become available regarding this topic, with over 100 publications in the last year alone. It thus seems quite reasonable to publish an update. It is imperative that clinicians and immunologists specifically trained in allergology keep abreast of the new and rapidly evolving evidence available for PAMD@. PAMD@ may initially appear complex to interpret; however, with increasing experience, the information gained provides relevant information for the allergist. This is especially true for food allergy, Hymenoptera allergy, and for the selection of allergen immunotherapy. Nevertheless, all sIgE tests, including PAMD@, should be evaluated within the framework of a patient's clinical history, because allergen sensitization does not necessarily imply clinical relevant allergies.
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Fischer J, Huynh HN, Hebsaker J, Forchhammer S, Yazdi AS. Prevalence and Impact of Type I Sensitization to Alpha-Gal in Patients Consulting an Allergy Unit. Int Arch Allergy Immunol 2019; 181:119-127. [PMID: 31805569 DOI: 10.1159/000503966] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 10/07/2019] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Alpha-gal syndrome is a complex allergy with high clinical relevance regarding mammalian-derived food and drugs and is characterized by the presence of IgE antibodies directed at the carbohydrate galactose-α-1,3-galactose. As not all alpha-gal sIgE-positive individuals pre-sent clinical symptoms upon consumption of mammalian meat, the diagnostic value of alpha-gal sIgE has yet to be clarified. OBJECTIVE To investigate the prevalence of alpha-gal-sIgE positivity among allergy patients, examine the impact of tick bites as associated risk factors and determine the diagnostic value of alpha-gal-sIgE positivity. METHODS A retrospective cross-sectional study evaluating patients in the Allergy Unit was performed. Alpha-gal-sIgE levels were assessed by ImmunoCAP assay. Exposure to tick bites was assessed by a questionnaire. A receiver operating characteristics (ROC) curve analysis was performed to determine the diagnostic value of alpha-gal sIgE for the diagnosis of alpha-gal syndrome. RESULTS In the study population (n = 1369), the overall prevalence of alpha-gal-sIgE-positive (≥0.10 kUA/L) individuals was 19.9%, and the highest prevalence (30.2%) was found in patients with insect venom allergies. A reported tick bite within the 12 months prior to blood sampling significantly increased the risk of alpha-gal-sIgE positivity (OR 2.084). The ROC curve analysis indicated alpha-gal sIgE ≥0.54 kUA/L as the optimal cutoff point for assessing the diagnostic value of alpha-gal syndrome in allergy patients. CONCLUSIONS In allergy care settings, alpha-gal-sIgE positivity is a common finding. Alpha-gal sIgE is a sensitive marker in the diagnosis of alpha-gal syndrome but has limited predictive value for the characteristics or severity of this allergy.
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Affiliation(s)
- Jörg Fischer
- Department of Dermatology, Faculty of Medicine, Eberhard Karls University Tübingen, Tübingen, Germany,
| | - Hoai-Nam Huynh
- Department of Dermatology, Faculty of Medicine, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Johanna Hebsaker
- Department of Dermatology, Faculty of Medicine, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Stephan Forchhammer
- Department of Dermatology, Faculty of Medicine, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Amir Sadegh Yazdi
- Department of Dermatology, Faculty of Medicine, Eberhard Karls University Tübingen, Tübingen, Germany.,Department of Dermatology, RWTH Aachen, Aachen, Germany
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Diagnosis and Management of Patients with the α-Gal Syndrome. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY-IN PRACTICE 2019; 8:15-23.e1. [PMID: 31568928 DOI: 10.1016/j.jaip.2019.09.017] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 09/18/2019] [Accepted: 09/20/2019] [Indexed: 01/30/2023]
Abstract
The galactose-α-1,3-galactose (α-Gal) syndrome has many novel features that are relevant to diagnosis and management. In most cases, the diagnosis can be made on a history of delayed allergic reactions to mammalian meat and the blood test for IgE to the oligosaccharide α-Gal. In general, the diagnosis also dictates the primary treatment, that is, avoiding mammalian meat and also dairy in some cases. In the United States, the lone star tick is the primary cause of this disease, but different ticks are responsible in other countries. Blood levels of IgE to α-Gal often drop in patients who avoid recurrent tick bites, but the rate of decline is variable. Similarly, the delay before reactions is variable and the severity of the allergic reactions is not predicted by the delay or the titer of specific IgE. Some mammalian-derived products such as heart valves, gelatin-based plasma expanders, and pancreatic enzymes are relevant to only select patient groups. A minority of cases may benefit from avoiding a wide range of products that are prepared with mammalian-derived constituents, such as gelatin. This review focuses on the nature of the syndrome, common challenges in diagnosis and management, and also gaps in our current knowledge that would benefit from additional investigation.
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34
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Abstract
α-Gal syndrome results from sensitization to the carbohydrate epitope galactose-α-1,3-galactose (α‑gal). The allergen occurs in mammalian meat and innards, but also in other foods and medical products of animal origin. Allergic reactions generally occur delayed after allergen intake with a latency period, depending on the individual tolerance threshold and the influence of cofactors. Details in the patient's medical history can help to establish the suspected diagnosis of α‑gal syndrome. Confirmation of the diagnosis requires the expertise of specialists, experienced with the implementation and interpretation of in vitro and in vivo diagnostic tests. Whereas skin prick testing with commercial whole-meat extracts often does not provide reliable results, allergen-specific IgE (α-gal) is generally detectable in affected patients. Cell-based tests such as the basophil activation test are currently only employed in an experimental setting. To evaluate, whether a sensitization is clinically relevant, an in-patient oral food challenge should be performed, using for example cooked pork or porcine kidney in addition to suspected cofactors.
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35
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Hodžić A, Mateos-Hernández L, Leschnik M, Alberdi P, Rego ROM, Contreras M, Villar M, de la Fuente J, Cabezas-Cruz A, Duscher GG. Tick Bites Induce Anti-α-Gal Antibodies in Dogs. Vaccines (Basel) 2019; 7:vaccines7030114. [PMID: 31540167 PMCID: PMC6789585 DOI: 10.3390/vaccines7030114] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 09/09/2019] [Accepted: 09/11/2019] [Indexed: 12/18/2022] Open
Abstract
Due to the functional inactivation of the gene encoding for the enzyme that is involved in the oligosaccharide galactose-α-1,3-galactose (α-Gal) synthesis, humans and Old-World primates are able to produce a large amount of antibodies against the glycan epitope. Apart from being involved in the hyperacute organ rejection in humans, anti-α-Gal antibodies have shown a protective effect against some pathogenic agents and an implication in the recently recognized tick-induced mammalian meat allergy. Conversely, non-primate mammals, including dogs, have the ability to synthetize α-Gal and, thus, their immune system is not expected to naturally generate the antibodies toward this self-antigen molecule. However, in the current study, we detected specific IgG, IgM, and IgE antibodies to α-Gal in sera of clinically healthy dogs by an indirect enzyme-linked immunosorbent assay (ELISA) for the first time. Furthermore, in a tick infestation experiment, we showed that bites of Ixodes ricinus induce the immune response to α-Gal in dogs and that the resulting antibodies (IgM) might be protective against Anaplasma phagocytophilum. These findings may help lead to a better understanding of the underlying mechanisms involved in mammalian meat allergy and tick-host-pathogen interactions, but they also open up the question about the possibility that dogs could develop an allergy to mammalian meat after tick bites, similar to that in humans.
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Affiliation(s)
- Adnan Hodžić
- Department of Pathobiology, Institute of Parasitology, University of Veterinary Medicine Vienna, 1210 Vienna, Austria;
| | - Lourdes Mateos-Hernández
- SaBio, Instituto de Investigación de Recursos Cinegéticos, IREC-CSIC-UCLM-JCCM, 13005 Ciudad Real, Spain; (L.M.H.); (P.A.); (M.C.); (M.V.); (J.d.l.F.)
- UMR BIPAR, INRA, ANSES, Ecole Nationale Vétérinaire d’Alfort, Université Paris-Est, 14 rue Pierre et Marie Curie, 94706 Maisons-Alfort, France
| | - Michael Leschnik
- Department for Companion Animals, Small Animal Clinic, University of Veterinary Medicine Vienna, 1210 Vienna, Austria;
| | - Pilar Alberdi
- SaBio, Instituto de Investigación de Recursos Cinegéticos, IREC-CSIC-UCLM-JCCM, 13005 Ciudad Real, Spain; (L.M.H.); (P.A.); (M.C.); (M.V.); (J.d.l.F.)
| | - Ryan O. M. Rego
- Institute of Parasitology, Biology Center, Czech Academy of Sciences, 37005 České Budějovice, Czech Republic;
| | - Marinela Contreras
- SaBio, Instituto de Investigación de Recursos Cinegéticos, IREC-CSIC-UCLM-JCCM, 13005 Ciudad Real, Spain; (L.M.H.); (P.A.); (M.C.); (M.V.); (J.d.l.F.)
| | - Margarita Villar
- SaBio, Instituto de Investigación de Recursos Cinegéticos, IREC-CSIC-UCLM-JCCM, 13005 Ciudad Real, Spain; (L.M.H.); (P.A.); (M.C.); (M.V.); (J.d.l.F.)
| | - José de la Fuente
- SaBio, Instituto de Investigación de Recursos Cinegéticos, IREC-CSIC-UCLM-JCCM, 13005 Ciudad Real, Spain; (L.M.H.); (P.A.); (M.C.); (M.V.); (J.d.l.F.)
- Department of Veterinary Pathobiology, Center for Veterinary Health Sciences, Oklahoma State University, Stillwater, OK 74078, USA
| | - Alejandro Cabezas-Cruz
- UMR BIPAR, INRA, ANSES, Ecole Nationale Vétérinaire d’Alfort, Université Paris-Est, 14 rue Pierre et Marie Curie, 94706 Maisons-Alfort, France
- Correspondence: or (A.C.-C.); (G.G.D.); Tel.: +33-1-49-774-677 (A.C.-C.); +43-1-250-77-2211 (G.G.D.)
| | - Georg Gerhard Duscher
- Department of Pathobiology, Institute of Parasitology, University of Veterinary Medicine Vienna, 1210 Vienna, Austria;
- Correspondence: or (A.C.-C.); (G.G.D.); Tel.: +33-1-49-774-677 (A.C.-C.); +43-1-250-77-2211 (G.G.D.)
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Pisazka V, Duscher G, Hodžić A, Reider N, Allerberger F. Alpha-gal allergy after a tick bite in Austria. Wien Klin Wochenschr 2019; 131:385-388. [PMID: 31087152 PMCID: PMC6702184 DOI: 10.1007/s00508-019-1506-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Accepted: 04/26/2019] [Indexed: 11/20/2022]
Abstract
Tick bites can cause the alpha-gal syndrome, which is characterized by delayed anaphylactic reactions mainly to red meat and offal due to IgE antibodies against mammalian galactose-alpha-1.3-galactose carbohydrate (alpha-gal). Ixodes ricinus bites are considered the primary cause of IgE antibody responses specific for alpha-gal in Europe. This article reports on a 51-year-old Austrian male who acquired a tick bite in Austria in spring 2017, which, within 48 h, resulted in prolonged inflammation of the skin area around the bite. The patient experienced an allergic reaction 3 months later approximately 8 h after eating a medium rare steak for dinner. The symptoms included an itchy rash on both sides of the torso and on both arms which persisted for several hours. In spring 2018, the patient suffered another tick bite. The patient’s skin reaction was similar to that of the previous year. In the following months, the patient experienced five episodes of severe allergic reactions, each during the night after having eaten beef for dinner. The symptoms included pruritic urticarial rash involving the entire body along with swollen hands, diarrhea, vomiting and in some episodes even shortness of breath. At the request of the patient, specific IgE antibodies against alpha-gal were determined, revealing a highly positive result (>100 kU/l). This brief report aims to raise awareness that recurrent delayed anaphylactic reactions to food can develop after tick bites.
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Affiliation(s)
- Veronika Pisazka
- Austrian Agency for Health and Food Safety (AGES), Spargelfeldstraße 191, 1220, Vienna, Austria
| | - Georg Duscher
- Institute of Parasitology, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Adnan Hodžić
- Institute of Parasitology, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Norbert Reider
- Department of Dermatology, Venereology and Allergy, Medical University Innsbruck, Innsbruck, Austria
| | - Franz Allerberger
- Austrian Agency for Health and Food Safety (AGES), Spargelfeldstraße 191, 1220, Vienna, Austria.
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Hilger C, Fischer J, Wölbing F, Biedermann T. Role and Mechanism of Galactose-Alpha-1,3-Galactose in the Elicitation of Delayed Anaphylactic Reactions to Red Meat. Curr Allergy Asthma Rep 2019; 19:3. [PMID: 30673913 PMCID: PMC6344609 DOI: 10.1007/s11882-019-0835-9] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Purpose of Review The alpha-Gal (α-Gal) syndrome is characterized by the presence of IgE antibodies directed at the carbohydrate galactose-alpha-1,3-galactose (α-Gal). In this article, we review the presence of α-Gal in food and non-food sources; we discuss the evolutionary context of the antibody response to α-Gal and highlight immune responses to α-Gal and other carbohydrates. Recent findings IgE antibodies have been associated with delayed allergy to red meat. In addition to food, drugs, and other products of animal origin are increasingly perceived as a risk for patients sensitized to α-Gal. The link between tick bites and anti-α-Gal IgE-antibody production that has been established first by epidemiological studies has now been confirmed in mouse models. Summary The anti-α-Gal immune response is complex and characterized by a unique feature. IgM and IgG antibodies have been found to confer protection against pathogens whereas the IgE-response to α-Gal is detrimental and causes severe reactions upon exposure to mammalian meat and other products.
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Affiliation(s)
- Christiane Hilger
- Department of Infection and Immunity, Luxembourg Institute of Health (LIH), 29, rue Henri Koch, L-4354, Esch-sur-Alzette, Luxembourg.
| | - Jörg Fischer
- Department of Dermatology, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Florian Wölbing
- Department of Dermatology and Allergy Biederstein, Technical University of Munich, Munich, Germany
| | - Tilo Biedermann
- Department of Dermatology and Allergy Biederstein, Technical University of Munich, Munich, Germany.,Clinical Unit Allergology, Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, Neuherberg, Germany
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38
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Swiontek K, Morisset M, Codreanu-Morel F, Fischer J, Mehlich J, Darsow U, Petitpain N, Biedermann T, Ollert M, Eberlein B, Hilger C. Drugs of porcine origin-A risk for patients with α-gal syndrome? THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY-IN PRACTICE 2018; 7:1687-1690.e3. [PMID: 30557715 DOI: 10.1016/j.jaip.2018.12.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 11/27/2018] [Accepted: 12/04/2018] [Indexed: 10/27/2022]
Affiliation(s)
- Kyra Swiontek
- Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg
| | - Martine Morisset
- Immunology-Allergology Unit, Centre Hospitalier, Luxembourg, Luxembourg
| | | | - Jörg Fischer
- Department of Dermatology, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Jana Mehlich
- Department of Dermatology and Allergy Biederstein, Technical University of Munich, Munich, Germany
| | - Ulf Darsow
- Department of Dermatology and Allergy Biederstein, Technical University of Munich, Munich, Germany
| | - Nadine Petitpain
- Regional Pharmacovigilance Center, Centre Hospitalier Régional Universitaire de Nancy, Nancy, France
| | - Tilo Biedermann
- Department of Dermatology and Allergy Biederstein, Technical University of Munich, Munich, Germany
| | - Markus Ollert
- Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg; Department of Dermatology and Allergy Center, Odense Research Center for Anaphylaxis, University of Southern Denmark, Odense, Denmark
| | - Bernadette Eberlein
- Department of Dermatology and Allergy Biederstein, Technical University of Munich, Munich, Germany
| | - Christiane Hilger
- Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg.
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Mabelane T, Basera W, Botha M, Thomas HF, Ramjith J, Levin ME. Predictive values of alpha-gal IgE levels and alpha-gal IgE: Total IgE ratio and oral food challenge-proven meat allergy in a population with a high prevalence of reported red meat allergy. Pediatr Allergy Immunol 2018; 29:841-849. [PMID: 30144162 DOI: 10.1111/pai.12969] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 07/19/2018] [Accepted: 07/19/2018] [Indexed: 11/30/2022]
Abstract
BACKGROUND Severe meat allergy with anaphylaxis may be caused by sensitization to alpha-gal. Levels of alpha-gal sensitization that correlate with high risk of meat allergy are currently unknown. We have identified an area with a high prevalence of reported red meat allergy which offered the opportunity to evaluate the diagnostic value of IgE antibody tests. METHODS To determine levels of alpha-gal IgE and alpha-gal:total IgE ratio in a large cohort of subjects with challenge-proven meat allergy compared with control subjects from the same environment, we conducted fieldwork assessing 131 participants who reported adverse reactions to meat, and 26 control subjects, by questionnaires, IgE sensitization to alpha-gal and oral food challenge to beef sausage. RESULTS Eighty-four participants were diagnosed with alpha-gal allergy. Alpha-gal IgE ranged between 0.7 and 344.5 kU/L. Alpha-gal:total IgE ratio ranged from 0.1% to 67.6%. Logistic regression analysis showed both alpha-gal IgE and alpha-gal:total IgE ratio strongly correlated with meat allergy, with AUC of 0.95. The values giving the best correct classification were IgE of 2.00 kU/L and ratio of 0.75%. The value above which there is a 95% probability of meat allergy is IgE>5.5 kU/L and ratio of 2.12%. CONCLUSION Alpha-gal allergy in a population with a high prevalence of reported red meat allergy showed a more rapid onset of symptoms than previously described and a high prevalence of isolated subjective gastrointestinal manifestations. Cutoff values are described for levels of sensitization to alpha-gal IgE and alpha-gal:total IgE ratio that are highly likely to result in clinically significant meat allergy.
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Affiliation(s)
- Tshegofatso Mabelane
- Department of Paediatric Allergology, University of Cape Town, Cape Town, South Africa
| | - Wisdom Basera
- School of Public Health and Family Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Maresa Botha
- Department of Paediatric Allergology, University of Cape Town, Cape Town, South Africa
| | - Heidi Facey Thomas
- Department of Paediatric Allergology, University of Cape Town, Cape Town, South Africa
| | - Jordache Ramjith
- Division of Epidemiology & Biostatistics, School of Public Health & Family Medicine, University of Cape Town, Cape Town, South Africa.,Department for Health Evidence, Biostatistics Research Group, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Michael E Levin
- Department of Paediatric Allergology, University of Cape Town, Cape Town, South Africa.,Invivo Planetary Health, Group of the Worldwide Universities Network (WUN)
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Mehlich J, Fischer J, Hilger C, Swiontek K, Morisset M, Codreanu-Morel F, Schiener M, Blank S, Ollert M, Darsow U, Biedermann T, Eberlein B. The basophil activation test differentiates between patients with alpha-gal syndrome and asymptomatic alpha-gal sensitization. J Allergy Clin Immunol 2018; 143:182-189. [PMID: 30125663 DOI: 10.1016/j.jaci.2018.06.049] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 06/03/2018] [Accepted: 06/28/2018] [Indexed: 10/28/2022]
Abstract
BACKGROUND Galactose-alpha-1,3-galactose (alpha-gal) syndrome is characterized by the presence of serum specific IgE antibodies to alpha-gal and delayed type I allergic reactions to the carbohydrate alpha-gal after consumption of mammalian (red) meat products and drugs of mammalian origin. Diagnostics currently rely on patient history, skin tests, determination of serum specific IgE antibodies, and oral food or drug challenges. OBJECTIVE We sought to assess the utility of different basophil parameters (basophil reactivity and sensitivity, the ratio of the percentage of CD63+ basophils induced by the alpha-gal-containing allergen to the percentage of CD63+ basophils after stimulation with anti-FcεRI antibody [%CD63+/anti-FcεRI], and area under the dose-response curve [AUC]) as biomarkers for the clinical outcome of patients with alpha-gal syndrome compared with subjects with asymptomatic alpha-gal sensitization. METHODS In addition to routine diagnostics, a basophil activation test (Flow CAST) with different concentrations of alpha-gal-containing allergens (eg, commercially available alpha-gal-carrying proteins and pork kidney extracts) was performed in 21 patients with alpha-gal syndrome, 12 alpha-gal-sensitized subjects, and 18 control subjects. RESULTS Alpha-gal-containing allergens induced strong basophil activation in a dose-dependent manner in patients. Basophil reactivity at distinct allergen concentrations, the %CD63+/anti-FcεRI ratio across most allergen concentrations, the AUC of dose-response curves, and basophil allergen threshold sensitivity (CD-sens) with pork kidney extract were significantly higher in patients with alpha-gal syndrome compared with those in sensitized subjects. All parameters were negative in control subjects. CONCLUSION The basophil activation test should be considered as an additional diagnostic test before performing time-consuming and potentially risky oral provocation tests. The %CD63+/anti-FcεRI ratio for all allergens and AUCs for pork kidney were the best parameters for distinguishing patients with alpha-gal syndrome from subjects with asymptomatic alpha-gal sensitization.
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Affiliation(s)
- Jana Mehlich
- Department of Dermatology and Allergy Biederstein, Technical University of Munich, Munich, Germany
| | - Jörg Fischer
- Department of Dermatology, Faculty of Medicine, Eberhard Karls University Tuebingen, Tuebingen, Germany
| | - Christiane Hilger
- Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg
| | - Kyra Swiontek
- Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg
| | - Martine Morisset
- Immunology-Allergology Department, Luxembourg Hospital, Luxembourg-Ville, Luxembourg
| | | | - Maximilian Schiener
- Center of Allergy and Environment (ZAUM), Technical University of Munich and Helmholtz Center Munich, Munich, Germany
| | - Simon Blank
- Center of Allergy and Environment (ZAUM), Technical University of Munich and Helmholtz Center Munich, Munich, Germany
| | - Markus Ollert
- Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg
| | - Ulf Darsow
- Department of Dermatology and Allergy Biederstein, Technical University of Munich, Munich, Germany
| | - Tilo Biedermann
- Department of Dermatology and Allergy Biederstein, Technical University of Munich, Munich, Germany
| | - Bernadette Eberlein
- Department of Dermatology and Allergy Biederstein, Technical University of Munich, Munich, Germany.
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Carter MC, Ruiz-Esteves KN, Workman L, Lieberman P, Platts-Mills TAE, Metcalfe DD. Identification of alpha-gal sensitivity in patients with a diagnosis of idiopathic anaphylaxis. Allergy 2018; 73:1131-1134. [PMID: 29161766 DOI: 10.1111/all.13366] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/16/2017] [Indexed: 11/30/2022]
Abstract
IgE antibodies (Ab) specific to galactose-α-1,3-galactose (alpha-gal) are responsible for a delayed form of anaphylaxis that occurs 3-6 hours after red meat ingestion. In a unique prospective study of seventy participants referred with a diagnosis of idiopathic anaphylaxis (IA), six (9%) were found to have IgE to alpha-gal. Upon institution of a diet free of red meat, all patients had no further episodes of anaphylaxis. Two of these individuals had indolent systemic mastocytosis (ISM). Those with ISM had more severe clinical reactions but lower specific IgE to alpha-gal and higher serum tryptase levels, reflective of the mast cell burden. The identification of alpha-gal syndrome in patients with IA supports the need for routine screening for this sensitivity as a cause of anaphylaxis, where reactions to alpha-gal are delayed and thus may be overlooked.
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Affiliation(s)
- M. C. Carter
- Laboratory of Allergic Diseases; National Institute of Allergy and Infectious Diseases; National Institutes of Health; Bethesda MD USA
| | - K. N. Ruiz-Esteves
- Laboratory of Allergic Diseases; National Institute of Allergy and Infectious Diseases; National Institutes of Health; Bethesda MD USA
| | - L. Workman
- Division of Allergy and Clinical Immunology; University of Virginia; Charlottesville VA USA
| | - P. Lieberman
- Departments of Internal Medicine and Pediatrics; University of Tennessee College of Medicine; Germantown TN USA
| | - T. A. E. Platts-Mills
- Division of Allergy and Clinical Immunology; University of Virginia; Charlottesville VA USA
| | - D. D. Metcalfe
- Laboratory of Allergic Diseases; National Institute of Allergy and Infectious Diseases; National Institutes of Health; Bethesda MD USA
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42
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Wilson JM, Platts-Mills TAE. Meat allergy and allergens. Mol Immunol 2018; 100:107-112. [PMID: 29685461 DOI: 10.1016/j.molimm.2018.03.018] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 03/19/2018] [Accepted: 03/20/2018] [Indexed: 12/11/2022]
Abstract
IgE-mediated hypersensitivity to ingested animal products, including both mammalian and avian sources, is increasingly appreciated as an important form of food allergy. Traditionally described largely in children, it is now clear that allergy to meat (and animal viscera) impacts both children and adults and represents a heterogeneous group of allergic disorders with multiple distinct syndromes. The recognition of entities such as pork-cat syndrome and delayed anaphylaxis to red meat, i.e- the α-Gal syndrome, have shed light on fundamental, and in some cases newly appreciated, features of allergic disease. These include insights into routes of exposure and mechanisms of sensitization, as well as the realization that IgE-mediated reactions can be delayed by several hours. Here we review mammalian and avian meat allergy with an emphasis on the molecular allergens and pathways that contribute to disease, as well as the role of in vitro IgE testing in diagnosis and management.
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Affiliation(s)
- Jeffrey M Wilson
- Division of Allergy & Immunology, University of Virginia, Charlottesville, VA, USA
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43
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Jappe U, Minge S, Kreft B, Ludwig A, Przybilla B, Walker A, Varga R, Seidel P, Biedermann T, Anemüller W, Kromminga A, Ruëff F, Merk H, Wagner N, Treudler R, Worm M, Waldmann I, Saloga J, Becker WM, Goldmann T, Platts‐Mills TA, Homann A. Meat allergy associated with galactosyl-α-(1,3)-galactose (α-Gal)-Closing diagnostic gaps by anti-α-Gal IgE immune profiling. Allergy 2018; 73:93-105. [PMID: 28670695 DOI: 10.1111/all.13238] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/27/2017] [Indexed: 12/13/2022]
Abstract
BACKGROUND Glycoproteins and glycolipids of some mammalian species contain the disaccharide galactosyl-α-(1,3)-galactose (α-Gal). It is known that α-Gal is immunogenic in humans and causes glycan-specific IgG and also IgE responses with clinical relevance. α-Gal is part of the IgE-reactive monoclonal therapeutic antibody cetuximab (CTX) and is associated with delayed anaphylaxis to red meat. In this study, different α-Gal-containing analytes are examined in singleplex and multiplex assays to resolve individual sensitization patterns with IgE against α-Gal. METHODS Three serum groups, α-Gal-associated meat allergy (MA) patients, idiopathic anaphylaxis (IA) patients with suspected MA, and non-meat-allergic healthy control individuals (HC), were analyzed via singleplex allergy diagnostics and a newly established immunoblot diagnostic system. The new dot blot detection system resolved individual IgE sensitization profiles for α-Gal-containing analytes CTX, bovine thyroglobulin (Bos d TG), and human serum albumin (HSA)-conjugated α-Gal. RESULTS Singleplex allergy diagnostics using the α-Gal analytes CTX and Bos d TG confirms the history of MA patients in 91% and 88% of the cases, respectively. A novel dot blot-based assay system for the detection of IgE against α-Gal reveals individual IgE sensitization profiles for α-Gal-containing analytes. An α-Gal-associated IgE cross-reactivity profile (IgE against CTX, Bos d TG, and HSA-α-Gal) was identified, which is associated with MA. CONCLUSIONS Detection of individual sensitization patterns with different α-Gal-containing analytes provides the basis for an individual allergy diagnosis for α-Gal-sensitized patients. Higher amounts of α-Gal in pork and beef innards compared to muscle meat as indicated by a higher staining intensity are a plausible explanation for the difference in allergic symptom severity.
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Affiliation(s)
- U. Jappe
- Division of Clinical and Molecular Allergology Priority Research Area Asthma & Allergy Research Center Borstel Airway Research Center North (ARCN) Member of the German Center for Lung Research (DZL) Borstel Germany
- Interdisciplinary Allergy Division Department of Internal Medicine University of Lübeck Lübeck Germany
| | - S. Minge
- Division of Clinical and Molecular Allergology Priority Research Area Asthma & Allergy Research Center Borstel Airway Research Center North (ARCN) Member of the German Center for Lung Research (DZL) Borstel Germany
| | - B. Kreft
- Department of Dermatology and Venereology Martin‐Luther‐University Halle‐Wittenberg Halle (Saale) Germany
| | - A. Ludwig
- Department of Dermatology and Allergology Klinikum Augsburg Augsburg Germany
| | - B. Przybilla
- Department of Dermatology Ludwig‐Maximilians University Munich Germany
| | - A. Walker
- Department of Dermatology Ludwig‐Maximilians University Munich Germany
| | - R. Varga
- Department of Dermatology Ludwig‐Maximilians University Munich Germany
| | - P. Seidel
- Department of Dermatology University of Tübingen Tübingen Germany
| | - T. Biedermann
- Department of Dermatology University of Tübingen Tübingen Germany
- Department of Dermatology and Allergology Technical University of Munich Munich Germany
| | - W. Anemüller
- Department of Dermatology University of Lübeck Lübeck Germany
| | | | - F. Ruëff
- Department of Dermatology Ludwig‐Maximilians University Munich Germany
| | - H. Merk
- Department of Dermatology RWTH Aachen University Aachen Germany
| | - N. Wagner
- Department of Dermatology Klinikum Darmstadt Germany
| | - R. Treudler
- Department of Dermatology, Venereology and Allergology University of Leipzig Leipzig Germany
| | - M. Worm
- Department of Dermatology and Allergy Allergy Center Charité Berlin Germany
| | - I. Waldmann
- Dermatology & Allergology St. Bernward Klinik Hildesheim Germany
| | - J. Saloga
- Department of Dermatology University of Mainz Mainz Germany
| | - W. M. Becker
- Division of Clinical and Molecular Allergology Priority Research Area Asthma & Allergy Research Center Borstel Airway Research Center North (ARCN) Member of the German Center for Lung Research (DZL) Borstel Germany
| | - T. Goldmann
- Pathology of the University Medical Center Schleswig‐Holstein (UKSH) Campus Lübeck and Research Center Borstel Airway Research Center North (ARCN) Member of the German Center for Lung Research (DZL) Borstel Germany
| | - T. A. Platts‐Mills
- University of Virginia Asthma and Allergic Diseases Center Charlottesville USA
| | - A. Homann
- Division of Clinical and Molecular Allergology Priority Research Area Asthma & Allergy Research Center Borstel Airway Research Center North (ARCN) Member of the German Center for Lung Research (DZL) Borstel Germany
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Étude des cas d’anaphylaxies aux viandes de mammifères déclarés au réseau d’allergo-vigilance. REVUE FRANCAISE D ALLERGOLOGIE 2017. [DOI: 10.1016/j.reval.2017.07.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Pali‐Schöll I, De Lucia M, Jackson H, Janda J, Mueller RS, Jensen‐Jarolim E. Comparing immediate-type food allergy in humans and companion animals-revealing unmet needs. Allergy 2017; 72:1643-1656. [PMID: 28394404 DOI: 10.1111/all.13179] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/05/2017] [Indexed: 12/15/2022]
Abstract
Adverse food reactions occur in human as well as veterinary patients. Systematic comparison may lead to improved recommendations for prevention and treatment in both. In this position paper, we summarize the current knowledge on immediate-type food allergy vs other food adverse reactions in companion animals, and compare this to the human situation. While the prevalence of food allergy in humans has been well studied for some allergens, this remains to be investigated for animal patients, where owner-reported as well as veterinarian-diagnosed food adverse reactions are on the increase. The characteristics of the disease in humans vs dogs, cats, and horses are most often caused by similar, but sometimes species-dependent different pathophysiological mechanisms, prompting the specific clinical symptoms, diagnoses, and treatments. Furthermore, little is known about the allergen molecules causative for type I food allergy in animals, which, like in human patients, could represent predictive biomarkers for risk evaluation. The definite diagnosis of food allergy relies-as in humans-on elimination diet and provocation tests. Besides allergen avoidance in daily practice, novel treatment options and tolerization strategies are underway. Taken together, numerous knowledge gaps were identified in veterinary food allergy, which need to be filled by systematic comparative studies.
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Affiliation(s)
- I. Pali‐Schöll
- Comparative Medicine The Interuniversity Messerli Research Institute of the University of Veterinary Medicine Vienna Medical University of Vienna and University of Vienna Vienna Austria
| | - M. De Lucia
- Clinica Veterinaria Privata San Marco Padova Italy
| | - H. Jackson
- Dermatology Referral Services LTD Glasgow Scotland UK
| | - J. Janda
- Faculty of Science Charles University Prague Czech Republic
| | - R. S. Mueller
- Centre for Clinical Veterinary Medicine Ludwig Maximilian University Munich Munich Germany
| | - E. Jensen‐Jarolim
- Comparative Medicine The Interuniversity Messerli Research Institute of the University of Veterinary Medicine Vienna Medical University of Vienna and University of Vienna Vienna Austria
- Institute of Pathophysiology and Allergy Research Center of Pathophysiology Infectiology and Immunology Medical University of Vienna Vienna Austria
- Allergy Care Allergy Diagnosis and Study Center Vienna Austria
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Fischer J, Lupberger E, Hebsaker J, Blumenstock G, Aichinger E, Yazdi AS, Reick D, Oehme R, Biedermann T. Prevalence of type I sensitization to alpha-gal in forest service employees and hunters. Allergy 2017; 72:1540-1547. [PMID: 28273338 DOI: 10.1111/all.13156] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/01/2017] [Indexed: 12/21/2022]
Abstract
BACKGROUND The production of IgE molecules specific to the carbohydrate galactose-α-1,3-galactose (alpha-gal) is known to induce delayed anaphylaxis against mammalian meat. Tick bites constitute the primary sensitization source, as ticks transfer alpha-gal in their saliva to a host during a bite. The reported prevalence of alpha-gal-specific IgE (alpha-gal-sIgE) positivity varies between different populations from diverse geographic regions. OBJECTIVE To investigate the prevalence of alpha-gal-sIgE positivity in a population of forest service employees who are highly exposed to ticks in comparison with a residential population and a historic sample. METHODS A cross-sectional study evaluating 300 forest service employees and hunters from southwest Germany was performed. Alpha-gal-sIgE levels were assessed by ImmunoCAP assay. The prevalence of alpha-gal-sIgE-positive individuals was compared with a matched cohort composed of a residential population and blood samples from forest service employees collected 15 years ago. RESULTS In the study population, the prevalence of alpha-gal-sIgE-positive (≥0.10 kUA /L) individuals was 35.0%, whereas the prevalence of individuals with alpha-gal-sIgE levels ≥0.35 kUA /L was 19.3%. Alpha-gal-sIgE positivity was associated with total IgE levels and recent tick bites. Mammalian meat-induced delayed anaphylaxis was found in 8.6% of the participants with alpha-gal-sIgE levels ≥0.35 kUA /L. For forest service employees and hunters, the odds ratio for alpha-gal-sIgE positivity was 2.48 compared to the residential population. The prevalence of alpha-gal-sIgE positivity in the current and historic cohort was comparable. CONCLUSION Forest service employees and hunters compose a population with a high prevalence of alpha-gal-sIgE positivity and carry a considerable risk of red meat allergy.
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Affiliation(s)
- J. Fischer
- Department of Dermatology; Faculty of Medicine; Eberhard Karls University Tuebingen; Tuebingen Germany
| | - E. Lupberger
- Department of Dermatology; Faculty of Medicine; Eberhard Karls University Tuebingen; Tuebingen Germany
| | - J. Hebsaker
- Department of Dermatology; Faculty of Medicine; Eberhard Karls University Tuebingen; Tuebingen Germany
| | - G. Blumenstock
- Department of Clinical Epidemiology and Applied Biostatistics; Faculty of Medicine; Eberhard Karls University Tuebingen; Tuebingen Germany
| | - E. Aichinger
- Baden-Württemberg State Health Office; District Government Stuttgart; Stuttgart Germany
| | - A. S. Yazdi
- Department of Dermatology; Faculty of Medicine; Eberhard Karls University Tuebingen; Tuebingen Germany
| | - D. Reick
- Baden-Württemberg State Health Office; District Government Stuttgart; Stuttgart Germany
| | - R. Oehme
- Baden-Württemberg State Health Office; District Government Stuttgart; Stuttgart Germany
| | - T. Biedermann
- Department of Dermatology; Faculty of Medicine; Eberhard Karls University Tuebingen; Tuebingen Germany
- Department of Dermatology and Allergy Biederstein; Technische Universität; Munich Germany
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Allergy to pets and new allergies to uncommon pets. Allergol Select 2017; 1:214-221. [PMID: 30402618 PMCID: PMC6040002 DOI: 10.5414/alx01842e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 02/22/2016] [Indexed: 12/16/2022] Open
Abstract
Abstract. Animal dander is an important source of respiratory allergens, and sensitization to allergens from cat and/or dog during childhood represents a risk factor for the development of asthma and rhinitis later in life. The identification and characterization of allergenic components is crucial to improve diagnosis and therapy in patients with allergy to pets. Allergens from furry animals belong to a restricted number of protein families, a large majority are lipocalins or albumins, some are secretoglobins or latherins. Animal dander contains cross-reactive molecules and current efforts aim at defining species-specific allergens that have a high diagnostic sensitivity. Component-resolved diagnosis allows to discriminate genuine sensitization from cross-sensitization. This review contains a detailed description of allergenic components of cat, dog, horse, and small mammalian pets. Sensitizations to exotic pets, a newly emerging issue, are also discussed.
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Wilson JM, Schuyler AJ, Schroeder N, Platts-Mills TAE. Galactose-α-1,3-Galactose: Atypical Food Allergen or Model IgE Hypersensitivity? Curr Allergy Asthma Rep 2017; 17:8. [PMID: 28224342 DOI: 10.1007/s11882-017-0672-7] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
PURPOSE OF REVIEW Galactose-α-1,3-galactose (α-gal) is a carbohydrate allergen with several unique characteristics. In this article, we discuss some recent advances in our understanding of the 'alpha-gal syndrome,' highlight data supporting the role of ticks in pathogenesis, and speculate on immune mechanisms that lead to sensitization. RECENT FINDINGS First described as the target of IgE in individuals suffering immediate hypersensitivity reactions to the novel anti-EGF monoclonal antibody cetuximab, it is now clear that α-gal sensitization is associated with mammalian meat allergy as well as reactions to other mammalian products. Unlike traditional IgE-mediated food allergies, reactions to α-gal often do not manifest until several hours following an exposure, although co-factors can influence the presentation. Multiple pieces of evidence, including recent work with a mouse model, point to the fact that sensitization is mediated by exposure to certain hard ticks and increasingly we are aware of its globally widespread impact. The oligosaccharide α-gal represents a novel allergen with several unusual clinical features. It has been recognized now on multiple continents and its clinical presentation can be quite variable. Moreover, efforts to delineate the mechanisms leading to α-gal sensitization may have ramifications for our broader understanding of type 2 immunity.
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Affiliation(s)
- Jeffrey M Wilson
- Division of Allergy, Asthma, and Immunology, University of Virginia Health System, PO Box 801355, Charlottesville, VA, 22908, USA.
| | - Alexander J Schuyler
- Division of Allergy, Asthma, and Immunology, University of Virginia Health System, PO Box 801355, Charlottesville, VA, 22908, USA
| | - Nikhila Schroeder
- Division of Allergy, Asthma, and Immunology, University of Virginia Health System, PO Box 801355, Charlottesville, VA, 22908, USA
| | - Thomas A E Platts-Mills
- Division of Allergy, Asthma, and Immunology, University of Virginia Health System, PO Box 801355, Charlottesville, VA, 22908, USA
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Peptidomics of an in vitro digested α-Gal carrying protein revealed IgE-reactive peptides. Sci Rep 2017; 7:5201. [PMID: 28701697 PMCID: PMC5507865 DOI: 10.1038/s41598-017-05355-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 05/26/2017] [Indexed: 12/25/2022] Open
Abstract
The mammalian carbohydrate galactose-α1,3-galactose (α-Gal) causes a novel form of food allergy, red meat allergy, where patients experience severe allergic reactions several hours after red meat consumption. Here we explored gastric digestion of α-Gal glycoproteins using an in vitro model. Bovine thyroglobulin (BTG), a typical α-Gal carrying glycoprotein, was digested with pepsin. The resulting peptides were characterised by SDS PAGE, immunoblot and ImmunoCAP using sera from 20 red meat allergic patients. During pepsinolysis of BTG, a wide range of peptide bands was observed of which 14 to 17 kDa peptides remained stable throughout the gastric phase. The presence of the α-Gal epitope on the obtained peptides was demonstrated by an anti-α-Gal antibody and IgE from red meat allergic patients. The α-Gal digests were able to inhibit up to 86% of IgE reactivity to BTG. Importantly, basophil activation test demonstrated that the allergenic activity of BTG was retained after digestion in all four tested patients. Mass spectrometry-based peptidomics revealed that these peptides represent mostly internal and C-terminal parts of the protein, where the most potent IgE-binding α-Gal residues were identified at Asn1756, Asn1850 and Asn2231. Thus allergenic α-Gal epitopes are stable to pepsinolysis, reinforcing their role as clinically relevant food allergens.
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50
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Sim DW, Lee JS, Park KH, Jeong KY, Ye YM, Lee JH, Park JW. Accurate assessment of alpha-gal syndrome using cetuximab and bovine thyroglobulin-specific IgE. Mol Nutr Food Res 2017; 61. [PMID: 28497612 DOI: 10.1002/mnfr.201601046] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Revised: 05/04/2017] [Accepted: 05/04/2017] [Indexed: 12/20/2022]
Abstract
SCOPE IgE against galactose-α-1,3-galactose (α-Gal) causes alpha-gal syndrome. Bovine thyroglobulin (BTG) and cetuximab share this epitope. We aimed to determine the utility of specific IgE (sIgE) against cetuximab as compared to BTG for diagnosing alpha-gal syndrome. METHODS AND RESULTS Twelve patients with alpha-gal syndrome, 11 patients with immediate beef or pork allergy, 18 asymptomatic individuals with meat sensitization, and 10 non-atopic subjects were enrolled. We checked the levels of sIgE against BTG and cetuximab using the streptavidin CAP assay. Additionally, IgE reactivity to BTG and cetuximab was assessed by immunoblotting. All alpha-gal syndrome patients had a high concentration of sIgE against BTG, and cetuximab. In contrast to alpha-gal syndrome, patients with immediate allergic reactions to meat consumption and those with asymptomatic sensitization had significantly lower concentration of BTG and cetuximab sIgE, and a high prevalence of sIgE against bovine or porcine serum albumin. Although the concentration of sIgE against alpha-gal was lower in individuals with asymptomatic sensitization, IgE immunoblotting showed the presence of sIgE against α-Gal in this group. CONCLUSION Differentiation of alpha-gal syndrome from patients with immediate allergy to meat consumption or asymptomatic sensitization requires quantification of cetuximab- or BTG-induced sIgE via detection of IgE for α-gal.
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Affiliation(s)
- Da Woon Sim
- Division of Allergy and Immunology, Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea.,Department of Internal Medicine, Chonnam National University Hospital, Gwangju, Korea
| | - Jong Sun Lee
- Division of Allergy and Immunology, Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Kyung Hee Park
- Division of Allergy and Immunology, Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Kyoung Yong Jeong
- Division of Allergy and Immunology, Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Young-Min Ye
- Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, Korea
| | - Jae-Hyun Lee
- Division of Allergy and Immunology, Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Jung-Won Park
- Division of Allergy and Immunology, Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
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