1
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Achour J, Reche M, Valbuena T, Chapuis C, Guillon B, Galet O, Adel-Patient K, Bernard H, Hazebrouck S. Sunflower seed allergy: Identification of novel 2S-albumins as potential marker allergens. Allergy 2024. [PMID: 38619510 DOI: 10.1111/all.16124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 03/11/2024] [Accepted: 04/02/2024] [Indexed: 04/16/2024]
Affiliation(s)
- J Achour
- Université Paris Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé, Gif-sur-Yvette, France
| | - M Reche
- Hospital Universitario Infanta Sofía, San Sebastián de los Reyes, Madrid, Spain
| | - T Valbuena
- Hospital Universitario Infanta Sofía, San Sebastián de los Reyes, Madrid, Spain
| | - C Chapuis
- Université Paris Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé, Gif-sur-Yvette, France
| | - B Guillon
- Université Paris Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé, Gif-sur-Yvette, France
| | - O Galet
- Avril SCA 11/13, rue de Monceau, Paris, France
| | - K Adel-Patient
- Université Paris Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé, Gif-sur-Yvette, France
| | - H Bernard
- Université Paris Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé, Gif-sur-Yvette, France
| | - S Hazebrouck
- Université Paris Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé, Gif-sur-Yvette, France
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2
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Issa M, Michaudel C, Guinot M, Grauso-Culetto M, Guillon B, Lecardonnel J, Jouneau L, Chapuis C, Bernard H, Hazebrouck S, Castelli F, Fenaille F, Gaultier E, Rivière G, Houdeau E, Adel-Patient K. Long-term exposure from perinatal life to food-grade TiO 2 alters intestinal homeostasis and predisposes to food allergy in young mice. Allergy 2024; 79:471-484. [PMID: 38010857 DOI: 10.1111/all.15960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 10/24/2023] [Accepted: 10/31/2023] [Indexed: 11/29/2023]
Abstract
BACKGROUND Food allergy (FA) is an inappropriate immunological response to food proteins resulting from an impaired induction of oral tolerance. Various early environmental factors can affect the establishment of intestinal homeostasis, predisposing to FA in early life. In this context, we aimed to assess the effect of chronic perinatal exposure to food-grade titanium dioxide (fg-TiO2 ), a common food additive. METHODS Dams were fed a control versus fg-TiO2 -enriched diet from preconception to weaning, and their progeny received the same diet at weaning. A comprehensive analysis of baseline intestinal and systemic homeostasis was performed in offspring 1 week after weaning by assessing gut barrier maturation and microbiota composition, and local and systemic immune system and metabolome. The effect of fg-TiO2 on the susceptibility of progeny to develop oral tolerance versus FA to cow's milk proteins (CMP) was performed starting at the same baseline time-point, using established models. Sensitization to CMP was investigated by measuring β-lactoglobulin and casein-specific IgG1 and IgE antibodies, and elicitation of the allergic reaction by measuring mouse mast cell protease (mMCP1) in plasma collected after an oral food challenge. RESULTS Perinatal exposure to fg-TiO2 at realistic human doses led to an increased propensity to develop FA and an impaired induction of oral tolerance only in young males, which could be related to global baseline alterations in intestinal barrier, gut microbiota composition, local and systemic immunity, and metabolism. CONCLUSIONS Long-term perinatal exposure to fg-TiO2 alters intestinal homeostasis establishment and predisposes to food allergy, with a clear gender effect.
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Affiliation(s)
- Mohammad Issa
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI/Laboratoire d'Immuno-Allergie Alimentaire, Gif-sur-Yvette, France
| | - Chloé Michaudel
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI/Laboratoire d'Immuno-Allergie Alimentaire, Gif-sur-Yvette, France
| | - Marine Guinot
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI/Laboratoire d'Immuno-Allergie Alimentaire, Gif-sur-Yvette, France
| | - Marta Grauso-Culetto
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI/Laboratoire d'Immuno-Allergie Alimentaire, Gif-sur-Yvette, France
| | - Blanche Guillon
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI/Laboratoire d'Immuno-Allergie Alimentaire, Gif-sur-Yvette, France
| | - Jérôme Lecardonnel
- Université Paris-Saclay, INRAE, AgroParisTech, GABI, Jouy-en-Josas, France
| | - Luc Jouneau
- Université Paris-Saclay, INRAE, UVSQ, VIM, Jouy-en-Josas, France
| | - Céline Chapuis
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI/Laboratoire d'Immuno-Allergie Alimentaire, Gif-sur-Yvette, France
| | - Hervé Bernard
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI/Laboratoire d'Immuno-Allergie Alimentaire, Gif-sur-Yvette, France
| | - Stephane Hazebrouck
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI/Laboratoire d'Immuno-Allergie Alimentaire, Gif-sur-Yvette, France
| | - Florence Castelli
- Université Paris-Saclay, CEA, INRAE - UMR Médicaments et Technologies pour la Santé (DMTS), Laboratoire d'Innovation en Spectrométrie de Masse, Saclay, France
| | - François Fenaille
- Université Paris-Saclay, CEA, INRAE - UMR Médicaments et Technologies pour la Santé (DMTS), Laboratoire d'Innovation en Spectrométrie de Masse, Saclay, France
| | - Eric Gaultier
- Toxalim UMR1331 (Research Centre in Food Toxicology), Toulouse University, INRAE, ENVT, INP-Purpan, UPS, Toulouse, France
| | - Gilles Rivière
- Agence nationale de sécurité sanitaire de l'alimentation, de l'environnement et du travail (ANSES), Direction de l'Evaluation des Risques, Maisons-Alfort, France
| | - Eric Houdeau
- Toxalim UMR1331 (Research Centre in Food Toxicology), Toulouse University, INRAE, ENVT, INP-Purpan, UPS, Toulouse, France
| | - Karine Adel-Patient
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI/Laboratoire d'Immuno-Allergie Alimentaire, Gif-sur-Yvette, France
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3
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Piotin A, Hazebrouck S, Bernard H, de Blay F, Metz-Favre C. Buffalo's milk allergy: Role of sensitization to caprine β-casein. Pediatr Allergy Immunol 2023; 34:e13971. [PMID: 37366217 DOI: 10.1111/pai.13971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 05/10/2023] [Accepted: 05/21/2023] [Indexed: 06/28/2023]
Affiliation(s)
- Anays Piotin
- Allergology Unit, Chest Disease Department, Strasbourg University Hospital, Strasbourg, France
| | - Stéphane Hazebrouck
- CEA, INRAE, Département Médicaments Et Technologies Pour La Santé (DMTS), SPI, Paris Saclay University, Gif-Sur-Yvette, France
| | - Hervé Bernard
- CEA, INRAE, Département Médicaments Et Technologies Pour La Santé (DMTS), SPI, Paris Saclay University, Gif-Sur-Yvette, France
| | - Frédéric de Blay
- Allergology Unit, Chest Disease Department, Strasbourg University Hospital, Strasbourg, France
- Federation of Translational Medicine, University of Strasbourg, Strasbourg, France
| | - Carine Metz-Favre
- Allergology Unit, Chest Disease Department, Strasbourg University Hospital, Strasbourg, France
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4
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LaHood NA, Min J, Keswani T, Richardson CM, Amoako K, Zhou J, Marini-Rapoport O, Bernard H, Hazebrouck S, Shreffler WG, Love JC, Pomes A, Pedersen LC, Mueller GA, Patil SU. Immunotherapy-induced neutralizing antibodies disrupt allergen binding and sustain allergen tolerance in peanut allergy. J Clin Invest 2023; 133:e164501. [PMID: 36647835 PMCID: PMC9843057 DOI: 10.1172/jci164501] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 11/15/2022] [Indexed: 01/18/2023] Open
Abstract
In IgE-mediated food allergies, exposure to the allergen activates systemic allergic responses. Oral immunotherapy (OIT) treats food allergies through incremental increases in oral allergen exposure. However, OIT only induces sustained clinical tolerance and decreased basophil sensitivity in a subset of individuals despite increases in circulating allergen-specific IgG in all treated individuals. Therefore, we examined the allergen-specific antibodies from 2 OIT cohorts of patients with sustained and transient responses. Here, we compared antibodies from individuals with sustained or transient responses and discovered specific tolerance-associated conformational epitopes of the immunodominant allergen Ara h 2 recognized by neutralizing antibodies. First, we identified what we believe to be previously unknown conformational, intrahelical epitopes using x-ray crystallography with recombinant antibodies. We then identified epitopes only recognized in sustained tolerance. Finally, antibodies recognizing tolerance-associated epitopes effectively neutralized allergen to suppress IgE-mediated effector cell activation. Our results demonstrate the molecular basis of antibody-mediated protection in IgE-mediated food allergy, by defining how these antibodies disrupt IgE-allergen interactions to prevent allergic reactions. Our approach to studying the structural and functional basis for neutralizing antibodies demonstrates the clinical relevance of specific antibody clones in antibody-mediated tolerance. We anticipate that our findings will form the foundation for treatments of peanut allergy using neutralizing antibodies and hypoallergens.
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Affiliation(s)
- Nicole A. LaHood
- Food Allergy Center and Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Jungki Min
- National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, USA
| | - Tarun Keswani
- Food Allergy Center and Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Boston, Massachusetts, USA
| | | | - Kwasi Amoako
- Food Allergy Center and Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Jingjia Zhou
- Food Allergy Center and Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Boston, Massachusetts, USA
| | | | - Hervé Bernard
- Université Paris Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), Gif-sur-Yvette, France
| | - Stéphane Hazebrouck
- Université Paris Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), Gif-sur-Yvette, France
| | - Wayne G. Shreffler
- Food Allergy Center and Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - J. Christopher Love
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | | | - Lars C. Pedersen
- National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, USA
| | - Geoffrey A. Mueller
- National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, USA
| | - Sarita U. Patil
- Food Allergy Center and Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Boston, Massachusetts, USA
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5
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Henrottin J, Pilolli R, Huet AC, van Poucke C, Nitride C, De Loose M, Tranquet O, Larré C, Adel-Patient K, Bernard H, Mills EC, Gillard N, Monaci L. Optimization of a sample preparation workflow based on UHPLC-MS/MS method for multi-allergen detection in chocolate: An outcome of the ThRAll project. Food Control 2022. [DOI: 10.1016/j.foodcont.2022.109256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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6
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Hazebrouck S, Patil SU, Guillon B, Lahood N, Dreskin SC, Adel-Patient K, Bernard H. Immunodominant conformational and linear IgE epitopes lie in a single segment of Ara h 2. J Allergy Clin Immunol 2022; 150:131-139. [PMID: 35150723 PMCID: PMC10440805 DOI: 10.1016/j.jaci.2021.12.796] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 12/16/2021] [Accepted: 12/27/2021] [Indexed: 11/21/2022]
Abstract
BACKGROUND Contribution of conformational epitopes to the IgE reactivity of peanut allergens Ara h 2 and Ara h 6 is at least as important as that of the linear epitopes. However, little is known about these conformational IgE-binding epitopes. OBJECTIVE We investigated the distribution of conformational epitopes on chimeric 2S-albumins. METHODS Recombinant chimeras were generated by exchanging structural segments between Ara h 2 and Ara h 6. Well-refolded chimeras, as verified by circular dichroism analysis, were then used to determine the epitope specificity of mAbs by performing competitive inhibition of IgG binding. Furthermore, we delineated the contribution of each segment to the overall IgE reactivity of both 2S-albumins by measuring the chimeras' IgE-binding capacity with sera from 21 patients allergic to peanut. We finally assessed chimeras' capacity to trigger mast cell degranulation. RESULTS Configuration of the conformational epitopes was preserved in the chimeras. Mouse IgG mAbs, raised against natural Ara h 6, and polyclonal human IgE antibodies recognized different conformational epitopes distributed all along Ara h 6. In contrast, we identified human IgG mAbs specific to different Ara h 2 linear or conformational epitopes located in all segments except the C-terminal one. The major conformational IgE-binding epitope of Ara h 2 was located in a segment located between residues 33 and 81 that also contains the major linear hydroxyproline-containing epitope. Accordingly, this segment is critical for the capacity of Ara h 2 to induce mast cell degranulation. CONCLUSIONS Chimeric 2S-albumins provide new insights on the conformational IgE-binding epitopes of Ara h 2 and Ara h 6. Proximity of the immunodominant linear and conformational IgE-binding epitopes probably contributes to the high allergenic potency of Ara h 2.
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Affiliation(s)
- Stéphane Hazebrouck
- Université Paris Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI, Gif-sur-Yvette, France.
| | - Sarita U Patil
- Department of Medicine, Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital, the Food Allergy Center, Massachusetts General Hospital for Children, and Harvard Medical School, Boston, Mass
| | - Blanche Guillon
- Université Paris Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI, Gif-sur-Yvette, France
| | - Nicole Lahood
- Department of Medicine, Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital, the Food Allergy Center, Massachusetts General Hospital for Children, and Harvard Medical School, Boston, Mass
| | - Stephen C Dreskin
- Division of Allergy and Clinical Immunology, Department of Medicine, University of Colorado-Denver, Aurora, Colo
| | - Karine Adel-Patient
- Université Paris Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI, Gif-sur-Yvette, France
| | - Hervé Bernard
- Université Paris Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI, Gif-sur-Yvette, France
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7
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Huet AC, Paulus M, Henrottin J, Brossard C, Tranquet O, Bernard H, Pilolli R, Nitride C, Larré C, Adel-Patient K, Monaci L, Mills ENC, De Loose M, Gillard N, Van Poucke C. Development of incurred chocolate bars and broth powder with six fully characterised food allergens as test materials for food allergen analysis. Anal Bioanal Chem 2022; 414:2553-2570. [PMID: 35201367 DOI: 10.1007/s00216-022-03912-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 12/21/2021] [Accepted: 01/18/2022] [Indexed: 11/01/2022]
Abstract
The design and production of incurred test materials are critical for the development and validation of methods for food allergen analysis. This is because production and processing conditions, together with the food matrix, can modify allergens affecting their structure, extractability and detectability. For the ThRAll project, which aims to develop a mass spectrometry-based reference method for the simultaneous accurate quantification of six allergenic ingredients in two hard to analyse matrices. Two highly processed matrices, chocolate bars and broth powder, were selected to incur with six allergenic ingredients (egg, milk, peanut, soy, hazelnut and almond) at 2, 4, 10 and 40 mg total allergenic protein/kg food matrix using a pilot-scale food manufacturing plant. The allergenic activity of the ingredients incurred was verified using food-allergic patient serum/plasma IgE, the homogeneity of the incurred matrices verified and their stability at 4 °C assessed over at least 30-month storage using appropriate enzyme-linked immunosorbent assays (ELISA). Allergens were found at all levels from the chocolate bar and were homogenously distributed, apart from peanut and soy which could only be determined above 4 mg total allergenic ingredient protein/kg. The homogeneity assessment was restricted to analysis of soy, milk and peanut for the broth powder but nevertheless demonstrated that the allergens were homogeneously distributed. All the allergens tested were found to be stable in the incurred matrices for at least 30 months demonstrating they are suitable for method development.
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Affiliation(s)
- Anne-Catherine Huet
- CER Groupe, Analytical Laboratory, Rue du Point du Jour 8, 6900, Marloie, Belgium.
| | - Melody Paulus
- CER Groupe, Analytical Laboratory, Rue du Point du Jour 8, 6900, Marloie, Belgium
| | - Jean Henrottin
- CER Groupe, Analytical Laboratory, Rue du Point du Jour 8, 6900, Marloie, Belgium
| | - Chantal Brossard
- INRAE, UR1268 BIA, Rue de la Géraudière, BP71627, 44316, Nantes, France
| | - Olivier Tranquet
- INRAE, UR1268 BIA, Rue de la Géraudière, BP71627, 44316, Nantes, France.,INRAE, Aix-Marseille University, Biodiversité Et Biotechnologie Fongiques (BBF), UMR1163, 13009, Marseille, France
| | - Hervé Bernard
- INRAE-CEA, Service de Pharmacologie Et d'Immunoanalyse, Laboratoire d'Immuno-Allergie Alimentaire, Bât 136-CEA Saclay, 91191, Gif-sur-Yvette, France
| | - Rosa Pilolli
- Institute of Sciences of Food Production, CNR-ISPA, Bari, Italy
| | - Chiara Nitride
- School of Biological Sciences, Division of Infection, Immunity and Respiratory Medicine, Manchester Academic Health Science Centre, Manchester Institute of Biotechnology, The University of Manchester, Manchester, UK
| | - Colette Larré
- INRAE, UR1268 BIA, Rue de la Géraudière, BP71627, 44316, Nantes, France
| | - Karine Adel-Patient
- INRAE-CEA, Service de Pharmacologie Et d'Immunoanalyse, Laboratoire d'Immuno-Allergie Alimentaire, Bât 136-CEA Saclay, 91191, Gif-sur-Yvette, France
| | - Linda Monaci
- Institute of Sciences of Food Production, CNR-ISPA, Bari, Italy
| | - E N Clare Mills
- School of Biological Sciences, Division of Infection, Immunity and Respiratory Medicine, Manchester Academic Health Science Centre, Manchester Institute of Biotechnology, The University of Manchester, Manchester, UK
| | - Marc De Loose
- Flanders Research Institute for Agriculture, Fisheries and Food (ILVO), Burgemeester Van Gansberghelaan 115, 9820, Merelbeke, Belgium
| | - Nathalie Gillard
- CER Groupe, Analytical Laboratory, Rue du Point du Jour 8, 6900, Marloie, Belgium
| | - Christof Van Poucke
- Flanders Research Institute for Agriculture, Fisheries and Food (ILVO), Brusselsesteenweg 370, 9090, Melle, Belgium
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Bernard H, Hazebrouck S, Gaiani N, Adel-Patient K. Allergen Risk Assessment for Specific Allergy to Small Ruminant's Milk: Development of Sensitive Immunoassays to Detect Goat's and Sheep's Milk Contaminations in Dairy Food Matrices. Front Allergy 2021; 2:733875. [PMID: 35386964 PMCID: PMC8974779 DOI: 10.3389/falgy.2021.733875] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 09/07/2021] [Indexed: 12/02/2022] Open
Abstract
Despite a high level of sequence identity between cow's, goat's, and sheep's milk (CM, GM, and SM, respectively) proteins, some patients tolerant to CM are allergic to GM and SM. In most cases, this specificity is due to the presence of IgE antibodies that bind only to caprine and ovine caseins. The patients may then develop severe allergic reactions after ingestion of CM products contaminated with low amounts of GM or SM. We thus aimed to develop an assay able to detect traces of caprine/ovine β-caseins in different food matrices, irrespective of the presence of the bovine homolog. We produced monoclonal antibodies (mAbs) specific to caprine caseins in mice tolerized to the bovine whole casein then sensitized to the caprine whole casein. In order to develop a two-site immunometric assay, we selected mAbs that could discriminate the caprine β-casein from its bovine homolog. Characteristics and performances of two tests were determined with various dairy products. Results were analyzed in relation with the IgE-immunoreactivity of the food matrices, thanks to sera from CM, GM/SM allergic patients. Our two-site immunometric assays demonstrated a high sensitivity with a detection limit of 1.6–3.2 ng/mL of caprine and ovine β-caseins. The tests were able to detect contaminations of GM in CM at the ppm level. Heat-treatment, ripening and coagulation processes, usually applied to dairy products that exhibit a very high IgE-immunoreactivity, did not impair the test sensitivity. These quantitative assays could then be useful for the risk assessment of food products potentially contaminated with GM and SM in order to prevent adverse reactions in patients specifically allergic to these milks.
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9
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Achour J, Guinot M, Guillon B, Kapel R, Galet O, Adel‐Patient K, Hazebrouck S, Bernard H. Sensitization Potency of Sunflower Seed Protein in a Mouse Model: Identification of 2S-Albumins More Allergenic Than SFA-8. Mol Nutr Food Res 2021; 65:e2100369. [PMID: 34331387 PMCID: PMC9285957 DOI: 10.1002/mnfr.202100369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Revised: 07/23/2021] [Indexed: 11/12/2022]
Abstract
SCOPE Food allergy to sunflower seed (SFS) protein is not frequent and only non-specific lipid transfert protein (nsLTP) Hel a 3 is officially recognized as a food allergen. Out of the eleven seed storage 2S-albumins (SESA) detected in SFS, only SFA-8 allergenicity has been investigated so far. The study aimed then to evaluate SFS protein allergenicity and particularly, to compare the sensitization potency of SESA in a mouse model. METHODS AND RESULTS The most abundant SESA and nsLTP were isolated from SFS through a combination of chromatographic methods. Purified proteins were then used to measure specific IgG1 and IgE responses in BALB/c mice orally sensitized to different SFS protein isolates. The study, thus, confirmed the allergenicity of SFA-8 and Hel a 3 but mice were also highly sensitized to other SESA such as SESA2-1 or SESA20-2. Furthermore, competitive inhibition of IgE-binding revealed that SFA-8 IgE-reactivity was due to cross-reactivity with other SESA. 11S-globulins were weakly immunogenic and were rapidly degraded in an in vitro model of gastroduodenal digestion. In contrast, Hel a 3, SESA2-1 and SFA-8 were more resistant to proteolysis and gastroduodenal digestion did not affect their IgE-reactivity. CONCLUSIONS SESA2-1 or SESA20-2 were more potent allergens than SFA-8 in this mouse model. Allergenicity of SESA must be now confirmed in SFS-allergic patients.
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Affiliation(s)
- Jihana Achour
- CEAINRAEDépartement Médicaments et Technologies pour la Santé (DMTS)/Service de Pharmacologie et d'ImmunoanalyseUniversité Paris‐SaclayGif‐sur‐YvetteFrance
| | - Marine Guinot
- CEAINRAEDépartement Médicaments et Technologies pour la Santé (DMTS)/Service de Pharmacologie et d'ImmunoanalyseUniversité Paris‐SaclayGif‐sur‐YvetteFrance
| | - Blanche Guillon
- CEAINRAEDépartement Médicaments et Technologies pour la Santé (DMTS)/Service de Pharmacologie et d'ImmunoanalyseUniversité Paris‐SaclayGif‐sur‐YvetteFrance
| | - Romain Kapel
- Laboratoire Réactions et Génie des ProcédésCNRSLRGPUniversité de LorraineNancyFrance
| | | | - Karine Adel‐Patient
- CEAINRAEDépartement Médicaments et Technologies pour la Santé (DMTS)/Service de Pharmacologie et d'ImmunoanalyseUniversité Paris‐SaclayGif‐sur‐YvetteFrance
| | - Stéphane Hazebrouck
- CEAINRAEDépartement Médicaments et Technologies pour la Santé (DMTS)/Service de Pharmacologie et d'ImmunoanalyseUniversité Paris‐SaclayGif‐sur‐YvetteFrance
| | - Hervé Bernard
- CEAINRAEDépartement Médicaments et Technologies pour la Santé (DMTS)/Service de Pharmacologie et d'ImmunoanalyseUniversité Paris‐SaclayGif‐sur‐YvetteFrance
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10
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Pilolli R, Van Poucke C, De Angelis E, Nitride C, de Loose M, Gillard N, Huet AC, Tranquet O, Larré C, Adel-Patient K, Bernard H, Mills ENC, Monaci L. Discovery based high resolution MS/MS analysis for selection of allergen markers in chocolate and broth powder matrices. Food Chem 2020; 343:128533. [PMID: 33183874 DOI: 10.1016/j.foodchem.2020.128533] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 10/19/2020] [Accepted: 10/29/2020] [Indexed: 12/12/2022]
Abstract
Peptide marker identification is an important step in development of a mass spectrometry method for multiple allergen detection, since specificity, robustness and sensitivity of the overall analytical method will depend on the reliability of the proteotypic peptides. As part of the development of a multi-analyte reference method, discovery analysis of two incurred food matrices has been undertaken to select the most reliable peptide markers. Six allergenic ingredients (milk, egg, peanut, soybean, hazelnut, and almond) were incurred into either chocolate or broth powder matrix. Different conditions of protein extraction and purification were tested and the tryptic peptide pools were analysed by untargeted high resolution tandem mass spectrometry and the resulting fragmentation spectra were processed via a commercial software for sequence identification. The analysis performed on incurred foods provides both a prototype effective and straightforward sample preparation protocol and delivers reliable peptides to be included in a standardized selected reaction monitoring method.
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Affiliation(s)
- Rosa Pilolli
- Institute of Sciences of Food Production, CNR-ISPA, Bari, Italy
| | - Christof Van Poucke
- Flanders Research Institute for Agriculture, Fisheries and Food, Melle, Belgium
| | | | - Chiara Nitride
- School of Biological Sciences, Division of Infection, Immunity and Respiratory Medicine, Manchester Academic Health Science Centre, Manchester Institute of Biotechnology, The University of Manchester, UK
| | - Marc de Loose
- Flanders Research Institute for Agriculture, Fisheries and Food, Melle, Belgium
| | | | | | | | | | - Karine Adel-Patient
- INRA-CEA, Service de Pharmacologie et d'Immunoanalyse, Laboratoire d'Immuno-Allergie Alimentaire, Gif-sur-Yvette, France
| | - Hervé Bernard
- INRA-CEA, Service de Pharmacologie et d'Immunoanalyse, Laboratoire d'Immuno-Allergie Alimentaire, Gif-sur-Yvette, France
| | - E N Clare Mills
- School of Biological Sciences, Division of Infection, Immunity and Respiratory Medicine, Manchester Academic Health Science Centre, Manchester Institute of Biotechnology, The University of Manchester, UK
| | - Linda Monaci
- Institute of Sciences of Food Production, CNR-ISPA, Bari, Italy.
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Adel-Patient K, Guinot M, Guillon B, Bernard H, Chikhi A, Hazebrouck S, Junot C. Administration of Extensive Hydrolysates From Caseins and Lactobacillus rhamnosus GG Probiotic Does Not Prevent Cow's Milk Proteins Allergy in a Mouse Model. Front Immunol 2020; 11:1700. [PMID: 33042105 PMCID: PMC7516991 DOI: 10.3389/fimmu.2020.01700] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 06/25/2020] [Indexed: 11/18/2022] Open
Abstract
Background Early nutrition may influence the development of food allergies later in life. In the absence of breastfeeding, hydrolysates from cow’s milk proteins (CMP) were indicated as a prevention strategy in at risk infants, but their proof of effectiveness in clinical and pre-clinical studies is still insufficient. Thanks to a validated mouse model, we then assessed specific and nonspecific preventive effects of administration of extensive hydrolysates from caseins (eHC) on the development of food allergy to CMP. The additional nonspecific effect of the probiotic Lactobacillus GG (LGG), commonly used in infant formula, was also assessed. Methods Groups of young BALB/cByJ female mice were pretreated by repeated gavage either with PBS (control mice), or with PBS solution containing non-hydrolyzed milk protein isolate (MPI), eHC or eHC+LGG (eq. of 10 mg of protein/gavage). All mice were then experimentally sensitized to CMP by gavage with whole CM mixed with the Th2 mucosal adjuvant Cholera toxin. All mice were further chronically exposed to cow’s milk. A group of mice was kept naïve. Sensitization to both caseins and to the non-related whey protein β-lactoglobulin (BLG) was evaluated by measuring specific antibodies in plasma and specific ex vivo Th2/Th1/Th17 cytokine secretion. Elicitation of the allergic reaction was assessed by measuring mMCP1 in plasma obtained after oral food challenge (OFC) with CMP. Th/Treg cell frequencies in gut-associated lymphoid tissue and spleen were analyzed by flow cytometry at the end of the protocol. Robust statistical procedure combining non-supervised and supervised multivariate analyses and univariate analyses, was conducted to reveal any effect of the pretreatments. Results PBS pretreated mice were efficiently sensitized and demonstrated elicitation of allergic reaction after OFC, whereas mice pretreated with MPI were durably protected from allergy to CMP. eHC+/-LGG pretreatments had no protective effect on sensitization to casein (specific) or BLG (non-specific), nor on CMP-induced allergic reactions. Surprisingly, eHC+LGG mice demonstrated significantly enhanced humoral and cellular immune responses after sensitization with CMP. Only some subtle changes were evidenced by flow cytometry. Conclusion Neither specific nor nonspecific preventive effects of administration of casein-derived peptides on the development of CMP food allergy were evidenced in our experimental setup. Further studies should be conducted to delineate the mechanisms involved in the immunostimulatory potential of LGG and to clarify its significance in clinical use.
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Affiliation(s)
- Karine Adel-Patient
- Service de Pharmacologie et d'Immunoanalyse, Département Médicaments et Technologies pour la Santé (DMTS), CEA, INRAE, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Marine Guinot
- Service de Pharmacologie et d'Immunoanalyse, Département Médicaments et Technologies pour la Santé (DMTS), CEA, INRAE, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Blanche Guillon
- Service de Pharmacologie et d'Immunoanalyse, Département Médicaments et Technologies pour la Santé (DMTS), CEA, INRAE, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Hervé Bernard
- Service de Pharmacologie et d'Immunoanalyse, Département Médicaments et Technologies pour la Santé (DMTS), CEA, INRAE, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Amina Chikhi
- Service de Pharmacologie et d'Immunoanalyse, Département Médicaments et Technologies pour la Santé (DMTS), CEA, INRAE, Université Paris-Saclay, Gif-sur-Yvette, France.,Laboratoire de Physiologie de la Nutrition et de Sécurité Alimentaire, Université d'Oran 1 Ahmed Ben Bella, Oran, Algeria
| | - Stéphane Hazebrouck
- Service de Pharmacologie et d'Immunoanalyse, Département Médicaments et Technologies pour la Santé (DMTS), CEA, INRAE, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Christophe Junot
- Service de Pharmacologie et d'Immunoanalyse, Département Médicaments et Technologies pour la Santé (DMTS), CEA, INRAE, Université Paris-Saclay, Gif-sur-Yvette, France
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12
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Bernard H, Turner PJ, Ah-Leung S, Ruiz-Garcia M, Clare Mills EN, Adel-Patient K. Circulating Ara h 6 as a marker of peanut protein absorption in tolerant and allergic humans following ingestion of peanut-containing foods. Clin Exp Allergy 2020; 50:1093-1102. [PMID: 32648641 DOI: 10.1111/cea.13706] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 03/30/2020] [Accepted: 05/29/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND Bioaccessibility of food allergens may be a key determinant of allergic reactions. OBJECTIVE To develop a protocol allowing the detection of the major peanut allergen, Ara h 6, in the bloodstream following ingestion of low amounts of peanut and to compare Ara h 6 bioaccessibility by food matrix. We further assessed for differences in absorption in healthy versus peanut-allergic volunteers. METHODS A blood pretreatment combining acidic shock and thermal treatment was developed. This protocol was then applied to blood samples collected from human volunteers (n = 6, healthy controls; n = 14, peanut-allergic patients) at various time-points following ingestion of increasing levels of peanut incurred in different food matrices (cookies, peanut butter and chocolate dessert). Immunodetection was performed using an in-house immunoassay. RESULTS An original pretreatment protocol was optimized, resulting in irreversible dissociation of human antibodies-Ara h 6 immune complex, thus rendering Ara h 6 accessible for its immunodetection. Ara h 6 was detected in samples from all volunteers following ingestion of 300-1000 mg peanut protein, although variations in the kinetics of passage were observed between individuals and matrices. Interestingly, in peanut-allergic subjects, Ara h 6 could be detected following ingestion of lower doses and at higher concentrations than in non-allergic volunteers. CONCLUSIONS AND CLINICAL RELEVANCE The kinetics and intensity of Ara h 6 passage in bloodstream depend on both individual and food matrix. Peanut-allergic patients appear to demonstrate higher absorption rate, the clinical significance of which warrants further evaluation.
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Affiliation(s)
- Hervé Bernard
- CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS)/ Service de Pharmacologie et d'Immunoanalyse, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Paul J Turner
- Section of Inflammation, Repair & Development, National Heart & Lung Institute, Imperial College London, London, UK
| | - Sandrine Ah-Leung
- CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS)/ Service de Pharmacologie et d'Immunoanalyse, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Monica Ruiz-Garcia
- Section of Inflammation, Repair & Development, National Heart & Lung Institute, Imperial College London, London, UK
| | - Elizabeth Naomi Clare Mills
- Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences and Manchester Institute of Biotechnology, Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK
| | - Karine Adel-Patient
- CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS)/ Service de Pharmacologie et d'Immunoanalyse, Université Paris-Saclay, Gif-sur-Yvette, France
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13
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Adel-Patient K, Bernard H, Fenaille F, Hazebrouck S, Junot C, Verhasselt V. Prevention of Allergy to a Major Cow's Milk Allergen by Breastfeeding in Mice Depends on Maternal Immune Status and Oral Exposure During Lactation. Front Immunol 2020; 11:1545. [PMID: 32849523 PMCID: PMC7396486 DOI: 10.3389/fimmu.2020.01545] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Accepted: 06/11/2020] [Indexed: 11/26/2022] Open
Abstract
Background: The high incidence of food allergy in childhood points to the need of elucidating early life factors dictating allergy susceptibility. Here, we aim to address in a mouse model how the exposure to a major cow's milk allergen through breastmilk of mothers with different immune status influences food allergy outcome in offspring. Methods: BALB/cJ future dams were either kept naïve, or sensitized through the oral route using cholera toxin (“orally sensitized”) or through the i.p. route using alum (“i.p. sensitized”), or rendered fully tolerant (oral gavage without any adjuvant) to bovine β-lactoglobulin (BLG). After mating with naïve males and delivery, mothers were orally exposed or not to BLG during the whole lactation. Then, eight groups of lactating mothers were considered: naïve, i.p. sensitized, orally sensitized, or tolerant, each exposed or not during lactation. In order to specifically address breastmilk effects on their allergy susceptibility, pups from naïve-synchronized mothers were cross-fostered by the different groups of treated dams and lactating mothers at delivery. In some experiments, mothers kept their own pups to address a possible in utero effect. BLG antigen, BLG-specific antibodies, and BLG-immune complexes were measured in breastmilk from the different lactating mother groups. Allergic sensitization was monitored in 5-weeks old female offspring (n = 7–8/group of lactating mothers) by determining BLG-specific antibodies in plasma and splenocytes cytokine secretion after i.p. injections of BLG/alum. Allergic reaction to oral BLG challenge was evaluated by measuring mMCP1 in plasma. Results: Offspring was protected from one allergic i.p. sensitization when nursed by i.p. sensitized mothers, independently of BLG exposure during lactation. Orally sensitized dams conferred protection in offspring solely when exposed to BLG during lactation, while naïve mothers did not provide any protection upon BLG exposure. The levels of protection correlated with the levels of BLG-specific antibodies and BLG-immune complex in breastmilk. There was a trend for decreased sensitization in offspring breastfed by tolerant and exposed mothers, which was not associated with transfer of specific antibodies through breastmilk. Protection provided by nursing by treated/exposed mothers was not persistent after a boost i.p. injection of the progeny and then did not protect them from an allergic reaction induced at this time point. No additional in utero effects were evidenced. Conclusion: Our study demonstrates the strong potential of breastmilk to modulate immune response to a major cow's milk allergen in the progeny. It highlights the importance of maternal immune status and of her consumption of the allergen during lactation in dictating the outcomes in offspring. This opens perspectives where modulating maternal immune status might increase the chance of cow's milk allergy prevention in breastfed children.
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Affiliation(s)
- Karine Adel-Patient
- Laboratoire d'Immuno-Allergie Alimentaire, Service de Pharmacologie et d'Immunoanalyse, Département Médicaments et Technologies pour la Santé (DMTS), CEA, INRAE, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Hervé Bernard
- Laboratoire d'Immuno-Allergie Alimentaire, Service de Pharmacologie et d'Immunoanalyse, Département Médicaments et Technologies pour la Santé (DMTS), CEA, INRAE, Université Paris-Saclay, Gif-sur-Yvette, France
| | - François Fenaille
- Laboratoire du Métabolisme des Médicaments, Service de Pharmacologie et d'Immunoanalyse, Département Médicaments et Technologies pour la Santé, CEA, INRAE, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Stéphane Hazebrouck
- Laboratoire d'Immuno-Allergie Alimentaire, Service de Pharmacologie et d'Immunoanalyse, Département Médicaments et Technologies pour la Santé (DMTS), CEA, INRAE, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Christophe Junot
- Laboratoire d'Immuno-Allergie Alimentaire, Service de Pharmacologie et d'Immunoanalyse, Département Médicaments et Technologies pour la Santé (DMTS), CEA, INRAE, Université Paris-Saclay, Gif-sur-Yvette, France.,Laboratoire du Métabolisme des Médicaments, Service de Pharmacologie et d'Immunoanalyse, Département Médicaments et Technologies pour la Santé, CEA, INRAE, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Valérie Verhasselt
- Chair of Human Lactology, School of Molecular Sciences, University of Western Australia, Perth, WA, Australia
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Rao H, Baricevic I, Bernard H, Smith F, Sayers R, Balasundaram A, Costello CA, Padfield P, Semic‐Jusufagic A, Simpson A, Adel‐Patient K, Xue W, Mills ENC. The Effect of the Food Matrix on the In Vitro Bio‐Accessibility and IgE Reactivity of Peanut Allergens. Mol Nutr Food Res 2020; 64:e1901093. [DOI: 10.1002/mnfr.201901093] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 02/18/2020] [Indexed: 11/09/2022]
Affiliation(s)
- Huan Rao
- School of Biological SciencesManchester Institute of BiotechnologyManchester Academic Health Sciences CentreUniversity of Manchester Manchester M1 7DN UK
- College of Food Science and Nutritional EngineeringChina Agricultural University Beijing 100083 China
| | - Ivona Baricevic
- School of Biological SciencesManchester Institute of BiotechnologyManchester Academic Health Sciences CentreUniversity of Manchester Manchester M1 7DN UK
| | - Hervé Bernard
- UMR Service de Pharmacologie et ImmunoanalyseCEAINRAUniversité Paris‐SaclayLaboratoire d'Immuno‐Allergie Alimentaire Gif‐sur‐Yvette F‐91191 France
| | - Frances Smith
- School of Biological SciencesManchester Institute of BiotechnologyManchester Academic Health Sciences CentreUniversity of Manchester Manchester M1 7DN UK
| | - Rebekah Sayers
- School of Biological SciencesManchester Institute of BiotechnologyManchester Academic Health Sciences CentreUniversity of Manchester Manchester M1 7DN UK
| | - Anuhradha Balasundaram
- School of Biological SciencesManchester Institute of BiotechnologyManchester Academic Health Sciences CentreUniversity of Manchester Manchester M1 7DN UK
| | - Carol Ann Costello
- School of Biological SciencesManchester Institute of BiotechnologyManchester Academic Health Sciences CentreUniversity of Manchester Manchester M1 7DN UK
| | - Philip Padfield
- School of Biological SciencesManchester Institute of BiotechnologyManchester Academic Health Sciences CentreUniversity of Manchester Manchester M1 7DN UK
| | - Aida Semic‐Jusufagic
- School of Biological SciencesManchester Academic Health Sciences CentreWythenshawe Hospital Manchester University NHS Foundation Trust Manchester M23 9LT UK
| | - Angela Simpson
- School of Biological SciencesManchester Academic Health Sciences CentreWythenshawe Hospital Manchester University NHS Foundation Trust Manchester M23 9LT UK
| | - Karine Adel‐Patient
- UMR Service de Pharmacologie et ImmunoanalyseCEAINRAUniversité Paris‐SaclayLaboratoire d'Immuno‐Allergie Alimentaire Gif‐sur‐Yvette F‐91191 France
| | - Wentong Xue
- College of Food Science and Nutritional EngineeringChina Agricultural University Beijing 100083 China
| | - E. N. Clare Mills
- School of Biological SciencesManchester Institute of BiotechnologyManchester Academic Health Sciences CentreUniversity of Manchester Manchester M1 7DN UK
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15
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Mills ENC, Adel-Patient K, Bernard H, De Loose M, Gillard N, Huet AC, Larré C, Nitride C, Pilolli R, Tranquet O, Pouke CV, Monaci L. Detection and Quantification of Allergens in Foods and Minimum Eliciting Doses in Food-Allergic Individuals (ThRAll). J AOAC Int 2019. [DOI: 10.1093/jaoac/102.5.1346] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
Risk-based approaches to managing allergens in foods are being developed by the food industry and regulatory authorities to support food-allergic consumers to avoid ingestion of their problem food, especially in relation to the traces of unintended allergens. The application of such approaches requires access to good quality data from clinical studies to support identification of levels of allergens in foods that are generally safe for most food-allergic consumers as well as analytical tools that are able to quantify allergenic food protein. The ThRAll project aims to support the application of risk-based approaches to food-allergen management in two ways. First, a harmonized quantitative MS-based prototype reference method will be developed for the detection of multiple food allergens in standardized incurred food matrices. This will be undertaken for cow’s milk, hen’s egg, peanut, soybean, hazelnut, and almond incurred into two highly processed food matrices, chocolate and broth powder. This activity is complemented by a second objective to support the development and curation of data on oral food challenges, which are used to define thresholds and minimum eliciting doses. This will be achieved through the development of common protocols for collection and curation of data that will be applied to allergenic foods for which there are currently data gaps.
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Affiliation(s)
- E N Clare Mills
- The University of Manchester, Manchester Institute of Biotechnology, Manchester Academic Health Science Centre, School of Biological Sciences, Division of Infection, Immunity and Respiratory Medicine, Manchester, United Kingdom
| | - Karine Adel-Patient
- INRA-CEA, Service de Pharmacologie et d’Immunoanalyse, Laboratoire d’Immuno-Allergie Alimentaire, Bât, 136-CEA de Saclay, 91191 Gif-sur-Yvette, France
| | - Hervé Bernard
- INRA-CEA, Service de Pharmacologie et d’Immunoanalyse, Laboratoire d’Immuno-Allergie Alimentaire, Bât, 136-CEA de Saclay, 91191 Gif-sur-Yvette, France
| | - Marc De Loose
- Flanders Research Institute for Agriculture, Fisheries and Food, Brusselsesteenweg 370, 9170 Melle, Belgium
| | | | | | - Collette Larré
- UR1268 BIA, Rue de la Géraudière, BP 71627, 44316 Nantes, France
| | - Chiara Nitride
- The University of Manchester, Manchester Institute of Biotechnology, Manchester Academic Health Science Centre, School of Biological Sciences, Division of Infection, Immunity and Respiratory Medicine, Manchester, United Kingdom
| | - Rosa Pilolli
- National Research Council of Italy (CNR-ISPA), Institute of Sciences of Food Production, via Giovanni Amendola 122/O - 70126 Bari, Italy
| | - Olivier Tranquet
- UR1268 BIA, Rue de la Géraudière, BP 71627, 44316 Nantes, France
| | - Christof Van Pouke
- Flanders Research Institute for Agriculture, Fisheries and Food, Brusselsesteenweg 370, 9170 Melle, Belgium
| | - Linda Monaci
- National Research Council of Italy (CNR-ISPA), Institute of Sciences of Food Production, via Giovanni Amendola 122/O - 70126 Bari, Italy
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Hazebrouck S, Guillon B, Paty E, Dreskin SC, Adel-Patient K, Bernard H. Variable IgE cross-reactivity between peanut 2S-albumins: The case for measuring IgE to both Ara h 2 and Ara h 6. Clin Exp Allergy 2019; 49:1107-1115. [PMID: 31108010 DOI: 10.1111/cea.13432] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 04/15/2019] [Accepted: 04/25/2019] [Indexed: 02/06/2023]
Abstract
BACKGROUND 2S-albumins Ara h 2 and Ara h 6 are the most potent peanut allergens and levels of specific immunoglobulin E (IgE) towards these proteins are good predictors of clinical reactivity. Because of structural homologies, Ara h 6 is generally considered to cross-react extensively with Ara h 2. OBJECTIVE We aimed to quantify the IgE cross-reactivity between Ara h 2 and Ara h 6. METHODS Peanut 2S-albumins were purified from raw peanuts. The IgE cross-reactivity between Ara h 2 and Ara h 6 was evaluated with 32 sera from French and US peanut-allergic patients by measuring the residual IgE-binding to one 2S-albumin after depletion of IgE antibodies recognizing the other 2S-albumin. The IgE cross-reactivity between Ara h 2 and Ara h 6 was further investigated by competitive inhibition of IgE-binding and by a model of mast cell degranulation. RESULTS A highly variable level of IgE cross-reactivity was revealed among the patients. The mean fraction of cross-reactive IgE antibodies represented only 17.1% of 2S-albumins-specific IgE antibodies and was lower than the mean fraction of IgE specific to Ara h 2 (57.4%) or to Ara h 6 (25.5%). The higher level of Ara h 2-specific IgE was principally due to the IgE-binding capacity of an insertion containing the repeated immunodominant linear epitope DPYSPOH S. The impact of IgE cross-reactivity on diagnostic testing was illustrated with a serum displaying an Ara h 6-specific IgE response of 26 UI/mL that was not associated with the capacity of Ara h 6 to trigger mast cell degranulation. CONCLUSIONS & CLINICAL RELEVANCE Immunoglobulin E antibodies specific to peanut 2S-albumins are mainly non-cross-reactive, but low-affinity cross-reactivity can affect diagnostic accuracy. Testing IgE-binding to a mixture of 2S-albumins rather than to each separately may enhance diagnostic performance.
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Affiliation(s)
- Stéphane Hazebrouck
- Service de Pharmacologie et Immunoanalyse (SPI), Laboratoire d'Immuno-Allergie Alimentaire, CEA, INRA, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Blanche Guillon
- Service de Pharmacologie et Immunoanalyse (SPI), Laboratoire d'Immuno-Allergie Alimentaire, CEA, INRA, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Evelyne Paty
- Université Paris Descartes-Assistance Publique des Hôpitaux de Paris, Hôpital Necker Enfants Malades, Paris, France
| | - Stephen C Dreskin
- Division of Allergy and Clinical Immunology, Department of Medicine, Denver School of Medicine, University of Colorado, Aurora, Colorado
| | - Karine Adel-Patient
- Service de Pharmacologie et Immunoanalyse (SPI), Laboratoire d'Immuno-Allergie Alimentaire, CEA, INRA, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Hervé Bernard
- Service de Pharmacologie et Immunoanalyse (SPI), Laboratoire d'Immuno-Allergie Alimentaire, CEA, INRA, Université Paris-Saclay, Gif-sur-Yvette, France
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Chikhi A, Elmecherfi KE, Bernard H, Cortes-Perez N, Kheroua O, Saidi D, Adel-Patient K. Evaluation of the efficiency of hydrolyzed whey formula to prevent cow's milk allergy in the BALB/c mouse model. Pediatr Allergy Immunol 2019; 30:370-377. [PMID: 30672606 DOI: 10.1111/pai.13017] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 11/06/2018] [Accepted: 11/20/2018] [Indexed: 12/16/2022]
Abstract
BACKGROUND Partially hydrolyzed milk formulas have been proposed for primary prevention in at-risk infants, but evidence of their efficiency and elucidation of the underlying mechanisms are still lacking. Thanks to a Th2-biased mouse model mimicking at-risk patients, we aimed to assess the potency of a partially hydrolyzed whey formula (pHWF) to induce oral tolerance thus preventing further cow's milk (CM) allergy. METHODS BALB/c mice were gavaged with pHWF, standard milk formula (SF), or vehicle only (PBS+). All mice were then orally sensitized to CM using cholera toxin and further chronically exposed to CM. Humoral (IgE, IgG1, IgG2a) and cellular (Th2/Th1/Th17 cytokine secretion; frequency of CD4+GATA3+ and CD4+CD25+Foxp3+ T cells in the spleen) responses against β-lactoglobulin (BLG) and whole caseins (CAS) were assessed, as well as a marker of elicitation of allergic reaction (mMCP-1) released after an oral challenge with CM. RESULTS All markers of sensitization and of allergic reaction were evidenced in the PBS+ mice and were significantly enhanced upon chronic exposure. Gavage with SF totally and durably prevented sensitization and elicitation of the allergic reaction. Conversely, pre-treatment with pHWF only reduced BLG-specific sensitization (IgE, Th2 cytokines), with no significant effect on sensitization to caseins. However, pHWF pre-treatment significantly reduced mMCP-1 concentration in plasma after CM challenges. CD4+CD25+Foxp3+ Treg cell frequency could not be correlated with tolerance efficiency. CONCLUSION Partially hydrolyzed whey formula only partially prevents the further development of CM allergy in this Th2-biased model. A hydrolysate from both whey and casein fractions may be more efficient.
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Affiliation(s)
- Amina Chikhi
- Laboratoire d'Immuno-Allergie Alimentaire, UMR Service de Pharmacologie et d'Immunoanalyse, CEA, INRA, Université Paris-Saclay, Gif-sur-Yvette, France.,Laboratoire de Physiologie de la Nutrition et de Sécurité Alimentaire, Université Oran 1 Ahmed Ben Bella, Oran, Algérie
| | - Kamel-Eddine Elmecherfi
- Laboratoire de Physiologie de la Nutrition et de Sécurité Alimentaire, Université Oran 1 Ahmed Ben Bella, Oran, Algérie
| | - Hervé Bernard
- Laboratoire d'Immuno-Allergie Alimentaire, UMR Service de Pharmacologie et d'Immunoanalyse, CEA, INRA, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Naima Cortes-Perez
- Laboratoire d'Immuno-Allergie Alimentaire, UMR Service de Pharmacologie et d'Immunoanalyse, CEA, INRA, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Omar Kheroua
- Laboratoire de Physiologie de la Nutrition et de Sécurité Alimentaire, Université Oran 1 Ahmed Ben Bella, Oran, Algérie
| | - Djamel Saidi
- Laboratoire de Physiologie de la Nutrition et de Sécurité Alimentaire, Université Oran 1 Ahmed Ben Bella, Oran, Algérie
| | - Karine Adel-Patient
- Laboratoire d'Immuno-Allergie Alimentaire, UMR Service de Pharmacologie et d'Immunoanalyse, CEA, INRA, Université Paris-Saclay, Gif-sur-Yvette, France
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Prévotat A, Godin J, Bernard H, Perez T, Le Rouzic O, Wallaert B. Improvement in body composition following a supervised exercise-training program of adult patients with cystic fibrosis. Respir Med Res 2019; 75:5-9. [PMID: 31235455 DOI: 10.1016/j.resmer.2019.04.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 04/02/2019] [Accepted: 04/08/2019] [Indexed: 12/13/2022]
Abstract
OBJECTIVES Maintenance of optimal nutritional status is a crucial issue for cystic fibrosis (CF) patients. Here, we evaluate the effects of an 8-week exercise training (ET) program on body composition in CF patients. METHODS This prospective pilot observational study was conducted in adult CF subjects in stable condition following their annual check-up. The ET program consisted of three sessions per week and included aerobic training (≥30min), muscle strengthening, circuit training, and relaxation. Exercise tolerance (6-minute walk test, 6MWT), pulmonary function, quadriceps isometric strength, and body composition (bioelectrical impedance analysis of fat-free mass [FFM], fat mass, and body cell mass) were analyzed before and immediately after the ET program. A control group of CF patients who preferred not to participate in the ET program received the same evaluations. RESULTS A total of 43 CF patients were enrolled and offered the ET program; 28 accepted (aged 28±5 years, forced expiratory volume in 1s [FEV1] 48.8±19% predicted) and 15 declined the ET program but agreed to be part of the control group (matched for age and CF severity: 30.8±9 years, FEV1 51.8±16.5%). Pulmonary function was unchanged at the end of the ET program, but significant improvements were observed in 6MWT distance (from 520±96m to 562±105m, P<0.001) and muscle strength (331±141N to 379±168N, P<0.001). Although mean body mass index did not change, the ET group showed significantly increased FFM (43.85±8kg to 44.5±9.2kg, P=0.03) and a trend towards increased body cell mass (21.4±6 to 22.1±6.6kg, P=0.06). All other parameters were unchanged by ET. There were no significant correlations between the increase in FFM and the improvements in either 6MWT distance or muscle strength. The CF control group exhibited no significant changes in any parameters between evaluations. CONCLUSIONS ET significantly improved FFM, but not body mass index, in CF patients. The results illustrate the superiority of bioimpedancemetry for assessing changes in body composition and reveal the importance of ET for improving not only exercise tolerance but also nutritional status in these patients.
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Affiliation(s)
- A Prévotat
- Université de Lille, CHU Lille, centre de ressource et de compétence pour la mucoviscidose, service de pneumologie et immuno-allergologie, hôpital Calmette, Lille, 59000, France
| | - J Godin
- Université de Lille, CHU Lille, centre de ressource et de compétence pour la mucoviscidose, service de pneumologie et immuno-allergologie, hôpital Calmette, Lille, 59000, France
| | - H Bernard
- Université de Lille, CHU Lille, centre de ressource et de compétence pour la mucoviscidose, service de pneumologie et immuno-allergologie, hôpital Calmette, Lille, 59000, France
| | - T Perez
- Université de Lille, CHU Lille, centre de ressource et de compétence pour la mucoviscidose, service de pneumologie et immuno-allergologie, hôpital Calmette, Lille, 59000, France
| | - O Le Rouzic
- Université de Lille, CHU Lille, centre de ressource et de compétence pour la mucoviscidose, service de pneumologie et immuno-allergologie, hôpital Calmette, Lille, 59000, France
| | - B Wallaert
- Université de Lille, CHU Lille, centre de ressource et de compétence pour la mucoviscidose, service de pneumologie et immuno-allergologie, hôpital Calmette, Lille, 59000, France.
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Mills ENC, Adel-Patient K, Bernard H, De Loose M, Gillard N, Huet AC, Larré C, Nitride C, Pilolli R, Tranquet O, Pouke CV, Monaci L. Detection and Quantification of Allergens in Foods and Minimum Eliciting Doses in Food-Allergic Individuals (ThRAll). J AOAC Int 2019; 102:1346-1353. [PMID: 30940282 DOI: 10.5740/jaoacint.19-0063] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Risk-based approaches to managing allergens in foods are being developed by the food industry and regulatory authorities to support food-allergic consumers to avoid ingestion of their problem food, especially in relation to the traces of unintended allergens. The application of such approaches requires access to good quality data from clinical studies to support identification of levels of allergens in foods that are generally safe for most food-allergic consumers as well as analytical tools that are able to quantify allergenic food protein. The ThRAll project aims to support the application of risk-based approaches to food-allergen management in two ways. First, a harmonized quantitative MS-based prototype reference method will be developed for the detection of multiple food allergens in standardized incurred food matrices. This will be undertaken for cow's milk, hen's egg, peanut, soybean, hazelnut, and almond incurred into two highly processed food matrices, chocolate and broth powder. This activity is complemented by a second objective to support the development and curation of data on oral food challenges, which are used to define thresholds and minimum eliciting doses. This will be achieved through the development of common protocols for collection and curation of data that will be applied to allergenic foods for which there are currently data gaps.
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Affiliation(s)
- E N Clare Mills
- The University of Manchester, Manchester Institute of Biotechnology, Manchester Academic Health Science Centre, School of Biological Sciences, Division of Infection, Immunity and Respiratory Medicine, Manchester, United Kingdom
| | - Karine Adel-Patient
- INRA-CEA, Service de Pharmacologie et d'Immunoanalyse, Laboratoire d'Immuno-Allergie Alimentaire, Bât, 136-CEA de Saclay, 91191 Gif-sur-Yvette, France
| | - Hervé Bernard
- INRA-CEA, Service de Pharmacologie et d'Immunoanalyse, Laboratoire d'Immuno-Allergie Alimentaire, Bât, 136-CEA de Saclay, 91191 Gif-sur-Yvette, France
| | - Marc De Loose
- Flanders Research Institute for Agriculture, Fisheries and Food, Brusselsesteenweg 370, 9170 Melle, Belgium
| | | | | | - Collette Larré
- UR1268 BIA, Rue de la Géraudière, BP 71627, 44316 Nantes, France
| | - Chiara Nitride
- The University of Manchester, Manchester Institute of Biotechnology, Manchester Academic Health Science Centre, School of Biological Sciences, Division of Infection, Immunity and Respiratory Medicine, Manchester, United Kingdom
| | - Rosa Pilolli
- National Research Council of Italy (CNR-ISPA), Institute of Sciences of Food Production, via Giovanni Amendola 122/O - 70126 Bari, Italy
| | - Olivier Tranquet
- UR1268 BIA, Rue de la Géraudière, BP 71627, 44316 Nantes, France
| | - Christof Van Pouke
- Flanders Research Institute for Agriculture, Fisheries and Food, Brusselsesteenweg 370, 9170 Melle, Belgium
| | - Linda Monaci
- National Research Council of Italy (CNR-ISPA), Institute of Sciences of Food Production, via Giovanni Amendola 122/O - 70126 Bari, Italy
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Adel-Patient K, Lezmi G, Castelli FA, Blanc S, Bernard H, Soulaines P, Dumond P, Ah-Leung S, Lageix F, de Boissieu D, Cortes-Perez N, Hazebrouck S, Fenaille F, Junot C, Dupont C. Deep analysis of immune response and metabolic signature in children with food protein induced enterocolitis to cow's milk. Clin Transl Allergy 2018; 8:38. [PMID: 30275944 PMCID: PMC6161449 DOI: 10.1186/s13601-018-0224-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 08/29/2018] [Indexed: 12/26/2022] Open
Abstract
Background Food Protein-Induced Enterocolitis Syndrome (FPIES) is considered to be a non-IgE mediated food allergy. However, its pathogenesis remains poorly understood and biomarkers are lacking. We aimed to perform in-depth characterization of humoral and cellular immune responses in children with cow’s milk (CM)-FPIES and investigated whether there is a FPIES metabolomic signature. Methods Children with CM-FPIES and control subjects with an IgE-mediated CM allergy (IgE-CMA), both avoiding CM, were recruited on the day of an oral food challenge. Blood samples were collected before the challenge. Total and specific levels of IgE, IgG1-4, IgA, IgM and IgD to various whey and casein allergens and to their gastroduodenal digestion products were measured in plasma, using plasma from CM-tolerant peanut allergic patients (IgE-PA, not avoiding CM) as additional controls. Cytokine secretion and cellular proliferation were analyzed after stimulation of PBMC with different CM allergens. Metabolomic profiles were obtained for plasma samples using liquid chromatography coupled to high-resolution mass spectrometry. Results Nine children with CM-FPIES and 12 control subjects (6 IgE-CMA and 6 IgE-PA) were included. In children with CM-FPIES, total Ig concentrations were lower than in control subjects, specific Ig against CM components were weak to undetectable, and no specific IgE against CM digestion products were detected. Moreover, in CM-FPIES patients, we did not find any Th cell proliferation or associated cytokine secretion after allergen reactivation, whereas such responses were clearly found in children with IgE-CMA. Plasma metabolic profiles were different between CM allergic patients, with significantly lower concentrations of various fatty acids and higher concentrations of primary metabolites such as amino acids in CM-FPIES compared to IgE-CMA patients. Conclusions In CM-FPIES, both humoral and cellular specific immune responses are weak or absent, and this is not related to CM avoidance. A metabolomic signature was identified in patients with CM-FPIES that may be useful for the diagnosis and management of this disease. Electronic supplementary material The online version of this article (10.1186/s13601-018-0224-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Karine Adel-Patient
- 1Service de Pharmacologie et Immunoanalyse (SPI), CEA, INRA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - Guillaume Lezmi
- 2APHP, Hôpital Universitaire Necker-Enfants Malades, Service de Pneumologie et Allergologie Pédiatriques, Université Paris Descartes, 75015 Paris, France
| | - Florence Anne Castelli
- 1Service de Pharmacologie et Immunoanalyse (SPI), CEA, INRA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - Sibylle Blanc
- 2APHP, Hôpital Universitaire Necker-Enfants Malades, Service de Pneumologie et Allergologie Pédiatriques, Université Paris Descartes, 75015 Paris, France.,Nice Pediatric Hospital, CHU Lenval, 06200 Nice, France
| | - Hervé Bernard
- 1Service de Pharmacologie et Immunoanalyse (SPI), CEA, INRA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - Pascale Soulaines
- 2APHP, Hôpital Universitaire Necker-Enfants Malades, Service de Pneumologie et Allergologie Pédiatriques, Université Paris Descartes, 75015 Paris, France
| | - Pascale Dumond
- 3Pediatric Allergology Service, Hôpital d'Enfants, 54511 Vandoeuvre les Nancy, France
| | - Sandrine Ah-Leung
- 1Service de Pharmacologie et Immunoanalyse (SPI), CEA, INRA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - Florence Lageix
- 2APHP, Hôpital Universitaire Necker-Enfants Malades, Service de Pneumologie et Allergologie Pédiatriques, Université Paris Descartes, 75015 Paris, France
| | - Delphine de Boissieu
- 2APHP, Hôpital Universitaire Necker-Enfants Malades, Service de Pneumologie et Allergologie Pédiatriques, Université Paris Descartes, 75015 Paris, France
| | - Naima Cortes-Perez
- 1Service de Pharmacologie et Immunoanalyse (SPI), CEA, INRA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - Stéphane Hazebrouck
- 1Service de Pharmacologie et Immunoanalyse (SPI), CEA, INRA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - François Fenaille
- 1Service de Pharmacologie et Immunoanalyse (SPI), CEA, INRA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - Christophe Junot
- 1Service de Pharmacologie et Immunoanalyse (SPI), CEA, INRA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - Christophe Dupont
- 2APHP, Hôpital Universitaire Necker-Enfants Malades, Service de Pneumologie et Allergologie Pédiatriques, Université Paris Descartes, 75015 Paris, France
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Trottier-Tellier F, Harvey L, Bernard H, Baillargeon J. A325 RISK EVALUATION OF ENDOSCOPIC RETROGRADE CHOLANGIOPANCREATOGRAPHY (ERCP)-RELATED CONTRAST MEDIA (CM) ALLERGIC REACTION AMONG PATIENTS KNOWN FOR ADVERSE REACTION TO IODINE CONTAINING PRODUCT. J Can Assoc Gastroenterol 2018. [DOI: 10.1093/jcag/gwy008.326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Guillon B, Bernard H, Paty E, Dreskin SC, Adel-Patient K, Hazebrouck S. Impact of Cross-reactivity between Major Peanut Allergens Ara h 2 and Ara h 6 on Specific IgE Measurements. J Allergy Clin Immunol 2018. [DOI: 10.1016/j.jaci.2017.12.751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Hazebrouck S, Guillon B, Paty E, Adel-Patient K, Bernard H. Conformational IgE-binding Epitopes of Major Peanut Allergen Ara h 2 Revealed with Chimeric 2S-albumins. J Allergy Clin Immunol 2018. [DOI: 10.1016/j.jaci.2017.12.569] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Maiga MA, Morin S, Bernard H, Rabot S, Adel-Patient K, Hazebrouck S. Neonatal mono-colonization of germ-free mice with Lactobacillus casei enhances casein immunogenicity after oral sensitization to cow's milk. Mol Nutr Food Res 2017; 61. [PMID: 28318108 DOI: 10.1002/mnfr.201600862] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 02/17/2017] [Accepted: 03/08/2017] [Indexed: 01/10/2023]
Abstract
SCOPE Food allergy is an increasing global health problem and perinatal administration of probiotic bacteria is currently under investigation in order to prevent the development of allergic diseases. Here, we investigated the impact of neonatal mono-colonization of mice with Lactobacillus casei BL23 on an oral sensitization to cow's milk. METHODS AND RESULTS Mono-colonized (LC) mice were obtained by inoculating L. casei to germ-free (GF) parents. Nine-week-old GF, LC, and conventional (CV) mice were orally sensitized to cow's milk with cholera toxin as adjuvant. Compared to GF and CV mice, LC mice developed higher casein-specific IgG responses. In contrast, no significant differences between GF and LC mice were observed for the humoral responses against whey proteins. Immunoblotting experiments performed on αS1-casein hydrolysates revealed the presence of small peptides immunoreactive with sera from LC mice but not from GF mice. After in vitro reactivation of splenocytes, secretion of IL-17 was higher in LC mice than in GF and CV mice. CONCLUSION Neonatal mono-colonization by L. casei BL23 modulated the allergic sensitization toward food antigens. Furthermore, our data suggest that casein-specific humoral responses in LC mice were enhanced because of casein hydrolysis by L. casei into immunogenic peptides.
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Affiliation(s)
- Matieny Aicha Maiga
- UMR Service de Pharmacologie et d'Immunoanalyse, CEA, INRA, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Stéphanie Morin
- UMR Service de Pharmacologie et d'Immunoanalyse, CEA, INRA, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Hervé Bernard
- UMR Service de Pharmacologie et d'Immunoanalyse, CEA, INRA, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Sylvie Rabot
- Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Karine Adel-Patient
- UMR Service de Pharmacologie et d'Immunoanalyse, CEA, INRA, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Stéphane Hazebrouck
- UMR Service de Pharmacologie et d'Immunoanalyse, CEA, INRA, Université Paris-Saclay, Gif-sur-Yvette, France
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Pouessel G, Claverie C, Labreuche J, Renaudin JM, Dorkenoo A, Eb M, Moneret-Vautrin A, Deschildre A, Leteurtre S, Grabenhenrich L, Worm M, Dölle S, Scherer K, Hutteger I, Christensen M, Bindslev-Jensen C, Mortz C, Eller E, Kjaer HF, Carneiro-Leão L, Badas J, Coimbra A, Levy DP, Ben-Shoshan M, Rimon A, Benor S, Arends NJT, Edelbroek N, de Groot H, Emons JAM, Brand HKA, Verhoeven D, van Veen LN, de Jong NW, Noh G, Jang EH, Pascal M, Dominguez O, Piquer M, Alvaro M, Jimenez-Feijoo R, Lozano J, Machinena A, del Mar Folqué M, Giner MT, Plaza AM, Turner P, Patel N, Vazquez-Ortiz M, Lindsley S, Walker L, Rosenberg S, Mari A, Alessandri C, Giangrieco I, Tuppo L, Rafaiani C, Mitterer G, Ciancamerla M, Ferrara R, Bernardi ML, Zennaro D, Tamburrini M, Ciardiello MA, Harwanegg C, Fernandez A, Selb R, Egenmann P, Epstein M, Hoffmann-Sommergruber K, Koning F, Lovik M, Clare Mills EN, Moreno J, van Loveren H, Wal JM, Diesner S, Bergmayr C, Pfitzner B, Assmann VE, Starkl P, Endesfelder D, Eiwegger T, Szepfalusi Z, Fehrenbach H, Jensen-Jarolim E, Hartmann A, Pali-Schöll I, Untersmayr E, Wille S, Meyer P, Klingebiel C, Lidholm J, Ehrenberg A, Östling J, Cleach I, Mège JL, Vitte J, Aina R, Dubiela P, Pfeifer S, Bublin M, Radauer C, Humeniuk P, Kabasser S, Asero R, Bogas G, Gomez F, Campo P, Salas M, Doña I, Barrionuevo E, Guerrero MA, Mayorga C, Prieto A, Barber D, Torres MJ, Jamin A, Wangorsch A, Ballmer B, Vieths S, Scheurer S, Apostolovic D, Mihailovic J, Krstic M, Starkhammar M, Velickovic TC, Hamsten C, van Hage M, van Erp FC, Knol EF, Kansen HM, Pontoppidan B, Meijer Y, van der Ent CK, Knulst AC, Sayers R, Brown H, Custovic A, Simpson A, Mills C, Schulz J, Akkerdaas J, Totis M, Capt A, Herouet-Guicheney C, van Ree R, Banerjee T, Banerjee A, Claude M, Bouchaud G, Lupi R, Castan L, Tranquet O, Denery-Papini S, Bodinier M, Brossard C, De Poi R, Gritti E, De Dominicis E, Popping B, de Laureto PP, Palosuo K, Kukkonen AK, Pelkonen A, Mäkelä M, Lee NA, Rost J, Muralidharan S, Campbell D, Mehr S, Nock C, Baumert J, Taylor S, Mastrorilli C, Tripodi S, Caffarelli C, Perna S, Di Rienzo Businco A, Sfika I, Dondi A, Bianchi A, Dascola CP, Ricci G, Cipriani F, Maiello N, del Giudice MM, Frediani T, Frediani S, Macrì F, Pistoletti C, Iacono ID, Patria MF, Varin E, Peroni D, Comberiati P, Chini L, Moschese V, Lucarelli S, Bernardini R, Pingitore G, Pelosi U, Olcese R, Moretti M, Cirisano A, Faggian D, Travaglini A, Plebani M, Verga MC, Calvani M, Giordani P, Matricardi PM, Ontiveros N, Cabrera-Chavez F, Galand J, Beaudouin E, Pineau F, Sakai S, Matsunaga K, Teshima R, Larré C, Denery S, Tschirner S, Trendelenburg V, Schulz G, Niggemann B, Beyer K, Bouferkas Y, Belabbas Y, Saidi D, Kheroua O, Mecherfi KEE, Guendouz M, Haddi A, Kaddouri H, Amaral L, Pereira A, Rodrigues S, Datema M, Jongejan L, Clausen M, Knulst A, Papadopoulos N, Kowalski M, de Blay F, Zwinderman A, Hoffman-Sommergruber K, Ballmer-Weber B, Fernandez-Rivas M, Deng S, Yin J, Eisenmann C, Nassiri M, Reinert R, van der Valk JPM, van Wijk RG, Vergouwe Y, Steyerberg EW, Reitsma M, Wichers HJ, Savelkoul HFJ, Vlieg-Boerstra B, Dubois AEJ, de Jong NW, Carolino F, Rodolfo A, Cernadas J, Roa-Medellín D, Rodriguez-Fernandez A, Navarro J, Albendiz V, Baeza ML, Intente-Herrero S, Mikkelsen A, Mehlig K, Lissner L, Verrill L, Luccioli S, van Bilsen J, Kuper F, Wolterbeek A, Rankouhi TR, Verschuren L, Cnossen H, Jeurink P, Garssen J, Knippels L, Garthoff J, Houben G, Leeman W, Eleonore Pettersson M, Schins AMM, Koppelman GH, Kollen BJ, Zubchenko S, Kuntz S, Mérida P, Álvaro M, Piquer M, Riggioni C, Castellanos JH, Jimenez R, Cap M, Drumez E, Lejeune S, Thumerelle C, Mordacq C, Nève V, Ricò S, Varini M, Nocerino R, Cosenza L, Amoroso A, Di Costanzo M, Di Scala C, Bedogni G, Canani RB, Turner PJ, Poza-Guedes P, González-Pérez R, Sánchez-Machín I, Matheu-Delgado V, Wambre E, Ballegaard AS, Madsen C, Gregersen J, Bøgh KL, Aubert P, Neunlist M, Magnan A, Lozano-Ojalvo D, Pablos-Tanarro A, Pérez-Rodríguez L, Molina E, López-Fandiño R, Rekima A, Macchiaverni P, Turfkruyer M, Holvoet S, Dupuis L, Baiz N, Annesi-Maesano I, Mercenier A, Nutten S, Verhasselt V, Mrakovcic-Sutic I, Banac S, Sutic I, Baricev-Novakovic Z, Sutic I, Pavisic V, Muñoz-Cano R, Jiménez-Rodríguez T, Corbacho D, Roca-Ferrer J, Bartra J, Bulog A, Micovic V, Markiewicz L, Szymkiewicz A, Szyc A, Wróblewska B, Harvey BM, Harthoorn LF, Wesley Burks A, Rentzos G, Björk ALB, Bengtsson U, Barber C, Kalicinsky C, Breynaert C, Coorevits L, Jansen C, Van Hoeyveld E, Verbeke K, Kochuyt AM, Schrijvers R, Deleanu D, Muntean A, Konstantakopoulou M, Pasioti M, Papadopoulou A, Iliopoulou A, Mikos N, Kompoti E, de Castro ED, Bartalomé B, Ue KL, Griffiths E, Till S, Grimshaw K, Roberts G, Selby A, Butiene I, Larco JI, Dubakiene R, Fiandor A, Fiocchi A, Papadopoulos N, Sigurdardottir S, Sprikkelman A, Schoemaker AF, Xepapadaki P, Keil T, Cojocariu Z, Barbado BS, Iancu V, Arroabarren E, Esarte MG, Arteaga M, Andrade MC, Borges D, Kalil J, Bianchi PG, Agondi RC, Gupta RK, Sharma A, Gupta K, Das M, Dwivedi P, Karseladze R, Jorjoliani L, Saginadze L, Tskhakaia M, Basello K, Piuri G, Speciani AF, Speciani MC, Camerotto C, Zinno F, Pakholchuk O, Nedelska S, Pattini S, Costantino MT, Peveri S, Villalta D, Savi E, Costanzi A, Revyakina VA, Kiseleva MA, Kuvshinova ED, Larkova IA, Shekhetov AA, Silva D, Moreira A, Plácido J, van der Kleij H, van Twuijver E, Sutorius R, de Kam PJ, van Odijk J, Lindqvist H, Lustig E, Jácome AAA, Aguilar KLB, Domínguez MG, Hernández DAM, Caruso C, Casale C, Rapaccini GL, Romano A, De Vitis I, Cocco RR, Aranda C, Mallozi MC, Motta JF, Moraes L, Pastorino A, Rosario N, Goudouris E, Porto A, Wandalsen NF, Sarinho E, Sano F, Solé D, Pitsios C, Petrodimopoulou M, Papadopoulou E, Passioti M, Kontogianni M, Adamia N, Khaleva E, del Prado AP, Du Toit G, Krzych E, Samolinska-Zawisza U, Furmanczyk K, Tomaszewska A, Raciborski F, Lipiec A, Samel-Kowalik P, Walkiewicz A, Borowicz J, Samolinski B, Nano AL, Recto M, Somoza ML, López NB, Alzate DP, Ruano FJ, Garcimartín MI, Haroun E, de la Torre MV, Rojas A, Onieva ML, Canto G, Rodrigues A, Forno A, Cabral AJ, Gonçalves R, Vorozhko I, Sentsova T, Chernyak O, Denisova S, Ilènko L, Muhortnich V, Zimmermann C, Rohrbach A, Bakhsh FR, Boudewijn K, Oomkes-Pilon AM, Van Ginkle D, Šilar M, Jeverica A, Vesel T, Avčin T, Korošec P, van der Valk J, Berends I, Arends N, van Maaren M, Wichers H, Emons J, Dubois A, de Jong N, Matsyura O, Besh L, Huang CH, Jan TR, Stiefel G, Tratt J, Kirk K, Carolino F, Arasi S, Caminiti L, Crisafulli G, Fiamingo C, Fresta J, Pajno G, Remington B, Kruizinga A, Marty Blom W, Westerhout J, Bijlsma S, Baumert J, Blankestijn M, Otten H, Klemans R, Michelsen-Huisman AD, van Os-Medendorp H, Kruizinga AG, Versluis A, van Duijn G, de Zeeuw-Brouwer HML, Castenmiller JJM, Noteborn HPJM, Houben GF, Bravin K, Luyt D, Javed B, Couch P, Munro C, Padfield P, Sperrin M, Byrne A, Oosthuizen L, Kelleher C, Ward F, Brosnan N, King G, Corbet E, Guzmán JAH, García MB, Asensio O, Navarrete LV, Larramona H, Miró XD, Pyrz K, Austin M, Boloh Y, Couch P, Galloway D, Hernandez P, Hourihane JO, Kenna F, Majkowska-Wojciechowska B, Regent L, Themisb M, Schnadt S, Semic-Jusufagic A, Galvin AD, Kauppila T, Kuitunen M, Kitsioulis NA, Douladiris N, Kostoudi S, Manolaraki I, Mitsias D, Manousakis E, Papadopoulos NG, Knibb R, Hammond J, Cooke R, Yrjänä J, Hanni AM, Vähäsarja P, Mustonen O, Dunder T, Kulmala P, Lasa E, D’Amelio C, Martínez S, Joral A, Gastaminza G, Goikoetxea MJ, Candy DCA, Van Ampting MTJ, Oude Nijhuis MM, Butt AM, Peroni DG, Fox AT, Knol J, Michaelis LJ, Padua I, Padrao P, Moreira P, Barros R, Sharif H, Ahmed M, Gomaa N, Mens J, Smit K, Timmermans F, Poredoš T, Jeverica AK, Sedmak M, Benedik E, Accetto M, Zupančič M, Yonamine G, Soldateli G, Aquilante B, Pastorino AC, de Moraes Beck CL, Gushken AK, de Barros Dorna M, dos Santos CN, Castro APM, Al-Qahtani A, Arnaout R, Khaliq AR, Amin R, Sheikh F, Alvarez J, Anda M, Palacios M, De Prada M, Ponce C, Balbino B, Sibilano R, Marichal T, Gaudenzio N, Karasuyama H, Bruhns P, Tsai M, Reber LL, Galli SJ, Ferreira AR, Cernadas JR, del Campo García A, Fernández SP, Carrera NS, Sánchez-Cruz FB, Lorenzo JRF, Claus S, Pföhler C, Ruëff F, Treudler R, Jaume ME, Madroñero A, Perez MTG, Julia JC, Plovdiv CH, Gethings L, Langridge J, Adel-Patient K, Bernard H, Barcievic-Jones I, Sokolova R, Yankova R, Ivanovska M, Murdjeva M, Popova T, Dermendzhiev S, Karjalainen M, Lehnigk U, Brown D, Locklear JC, Locklear J, Maris I, Hourihane J, Ornelas C, Caiado J, Ferreira MB, Pereira-Barbosa M, Puente Y, Daza JC, Monteseirin FJ, Ukleja-Sokolowska N, Gawronska-Ukleja E, Zbikowska-Gotz M, Bartuzi Z, Sokolowski L, Adams A, Mahon B, English K, Gourdon-Dubois N, Sellam L, Pereira B, Michaud E, Messaoudi K, Evrard B, Fauquert JL, Palomares F, Gomez G, Rodriguez MJ, Galindo L, Molina A, Paparo L, Mennini M, Aitoro R, Wawrzeńczyk A, Przybyszewski M, Wawrzeńczyk A, Sarıcoban HE, Ugras M, Yalvac Z, Flokstra-de Blok BMJ, van der Velde JL, Vereda A, Ippolito C, Traversa A, Adriano D, Bianchi DM, Gallina S, Decastelli L, Makatsori M, Miles A, Devetak SP, Devetak I, Tabet SA, Trandbohus JF, Winther P, Malling HJ, Hansen KS, Garvey LH, Wang CC, Cheng YH, Tung CW, Dietrich M, Marenholz I, Kalb B, Grosche S, Blümchen K, Schlags R, Price M, Rietz S, Esparza-Gordillo J, Lau S, Lee YA, Almontasheri A, Bahkali MA, Elshorbagi S, Alfhaid A, Altamimi M, Madbouly E, Al-Dhekri H, Arnaout RK, Basagaña M, Miquel S, Bartolomé B, Brix B, Rohwer S, Brandhoff S, Berger A, Suer W, Weimann A, Bueno C, Martín-Pedraza L, Abián S, Segundo-Acosta PS, López-Rodríguez JC, Barderas R, Batanero E, Cuesta-Herranz J, Villalba MT, Correia M, Benito-Garcia F, Arêde C, Piedade S, Morais-Almeida M, Hindley J, Yarham R, Kuklinska-Pijanka A, Gillick D, Patient K, Chapman MD, Bøgh KL, Miranda A, Matos E, Sokolova A, Rao H, Baricevic-Jones I, Smith F, Xue W, Magnusdottir H, Vidarsdottir AG, Lund S, Jensen AB, Ludviksson BR, Simon R, Elfont R, Bennett S, Voyksner R, de Lurdes Torre M, Yürek S, Faber MA, Bastiaensen A, Mangodt E, van Gasse A, Decuyper I, Sabato V, Hagendorens MM, Bridts CH, De Clerck LS, Ebo D, Schwarz S, Ziegert M, Albroscheit S, Schwager C, Kull S, Behrends J, Röckendorf N, Schocker F, Frey A, Homann A, Becker WM, Jappe U, Zaabat N, Osscini S, Agabriel C, Sterling B, Carsin A, Liabeuf V, Maćków M, Zbróg A, Bronkowska M, Courtois J, Gadisseur R, Bertholet C, Lukas P, Cavalier E, Delahaut P, Quinting B, Gertmo MB, Hasseus ET, Barzylovych V, Oliveira J, Ensina LF, Aranda CS, Dopazo L, Lopez R, Perez R, Santos-Diez L, Bilbao A, Garcia JM, Núñez IG, Mármol MÁA, Villarejo MJB, Martos JAB, Vergara MS, García JMI, Michalska A, Sergiejko G, Zacniewski R, Ghiordanescu IM, Deaconu C, Popescu M, Bumbacea RS, Ibranji A, Nikolla E, Loloci G, Juel-Berg N, Larsen LF, Poulsen LK, Marcelino J, Prata R, Costa AC, Duarte F, Neto M, Santos J, Pestana LC, Sampaio D, Minale P, Dignetti P, Bignardi D, Nedelea I, Popescu FD, Vieru M, Secureanu FA, Ganea CS, Vieira M, Silva JPM, Watts T, Watts S, Lomikovska M, Peredelskaya M, Nenasheva N, Filipovic I, Zivkovic Z, Filipovic D, Higgs J, Warner A, Jones C. Abstracts from the Food Allergy and Anaphylaxis Meeting 2016. Clin Transl Allergy 2017. [PMCID: PMC5384531 DOI: 10.1186/s13601-017-0142-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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Guillon B, Bernard H, Drumare MF, Hazebrouck S, Adel-Patient K. Back cover: Heat processing of peanut seed enhances the sensitization potential of the major peanut allergen Ara h 6. Mol Nutr Food Res 2016. [DOI: 10.1002/mnfr.201670124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Guillon B, Bernard H, Drumare MF, Hazebrouck S, Adel-Patient K. Heat processing of peanut seed enhances the sensitization potential of the major peanut allergen Ara h 6. Mol Nutr Food Res 2016; 60:2722-2735. [PMID: 27374416 PMCID: PMC5213772 DOI: 10.1002/mnfr.201500923] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 05/27/2016] [Accepted: 06/08/2016] [Indexed: 11/11/2022]
Abstract
SCOPE Processing of food has been shown to impact IgE binding and functionality of food allergens. In the present study, we investigated the impact of heat processing on the sensitization capacity of Ara h 6, a major peanut allergen and one of the most potent elicitors of the allergic reaction. METHODS AND RESULTS Peanut extracts obtained from raw or heat-processed peanut and some fractions thereof were biochemically and immunochemically characterized. These extracts/fractions, purified Ara h 6, or recombinant Ara h 6 including Ara h 6 mutants lacking disulfide bridges were used in in vitro digestion tests and mouse models of experimental sensitization. Peanut roasting led to the formation of complexes of high molecular weight, notably between Ara h 6 and Ara h 1, which supported the induction of IgE specific to native Ara h 6. On the contrary, a fraction containing free monomeric 2S albumins or purified native Ara h 6 displayed no intrinsic allergenicity. In addition to complex formation, heat denaturation and/or partial destabilization enhanced Ara h 6 immunogenicity and increased its sensitivity to digestion. CONCLUSION These results suggest that sensitization potency and IgE binding capacity can be supported by different structures, modified and/or produced during food processing in interaction with other food constituents.
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Affiliation(s)
- Blanche Guillon
- UMR CEA-INRA Service de Pharmacologie et d'Immunoanalyse, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Hervé Bernard
- UMR CEA-INRA Service de Pharmacologie et d'Immunoanalyse, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Marie-Françoise Drumare
- UMR CEA-INRA Service de Pharmacologie et d'Immunoanalyse, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Stéphane Hazebrouck
- UMR CEA-INRA Service de Pharmacologie et d'Immunoanalyse, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Karine Adel-Patient
- UMR CEA-INRA Service de Pharmacologie et d'Immunoanalyse, Université Paris-Saclay, Gif-sur-Yvette, France
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Charcosset A, Adel-Patient K, Dupont C, Bernard H. Assessment of IgE and IgG4 Binding Capacities of Cow's Milk Proteins Selectively Altered by Proteases. J Agric Food Chem 2016; 64:3394-3404. [PMID: 27015440 DOI: 10.1021/acs.jafc.5b01782] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Specific IgE and IgG4 have been reported to play key roles in the context of IgE-mediated cow's milk allergy (CMA), but the persistence of their epitopes in milk hydrolysates has not been evaluated. Using sera from 32 CMA patients, 6 CMA patients treated by epicutaneous therapy (CM-treated), and 4 CM-tolerant peanut allergic patients, we analyzed the IgE and IgG4 binding capacities related to major milk allergens in processed milk. Different proteases (plasmin, chymosin, α-chymotrypsin, or pepsin) were used progressively and selectively to hydrolyze β-lactoglobulin (β-LG) and casein (CN) in milk. We then showed that proteases differentially affect IgE or IgG4 immunoreactivities of CN and β-LG and also that we could not relate IgE and/or IgG4 levels or specificities to milk hydrolysates to the clinical status of the patients.
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Affiliation(s)
- Alexandre Charcosset
- UMR Service de Pharmacologie et d'Immunoanalyse, CEA-INRA, Université Paris-Saclay , CEA de Saclay, F-91191 Gif-sur-Yvette, France
| | - Karine Adel-Patient
- UMR Service de Pharmacologie et d'Immunoanalyse, CEA-INRA, Université Paris-Saclay , CEA de Saclay, F-91191 Gif-sur-Yvette, France
| | - Christophe Dupont
- Pediatric Gastroenterology Service, Hôpital Necker Enfants Malades , F-75015 Paris, France
| | - Hervé Bernard
- UMR Service de Pharmacologie et d'Immunoanalyse, CEA-INRA, Université Paris-Saclay , CEA de Saclay, F-91191 Gif-sur-Yvette, France
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Blanc F, Bernard H, Ah-Leung S, Przybylski-Nicaise L, Skov PS, Purohit A, de Blay F, Ballmer-Weber B, Fritsche P, Rivas MF, Reig I, Sinaniotis A, Vassilopoulou E, Hoffmann-Sommergruber K, Vieths S, Rigby N, Mills C, Adel-Patient K. Further studies on the biological activity of hazelnut allergens. Clin Transl Allergy 2015; 5:26. [PMID: 26191402 PMCID: PMC4506444 DOI: 10.1186/s13601-015-0066-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Accepted: 05/20/2015] [Indexed: 01/13/2023] Open
Abstract
Background Sensitization to hazelnut allergens vary depending on the geographic origin and age of the patients. The objective of this study was to further investigate the allergenic activity of hazelnut allergens using sera from patients recruited in various European regions and presenting different sensitization patterns to hazelnut proteins. Methods Natural Cor a 11 and Cor a 9 were purified from hazelnut whereas Cor a 1 and Cor a 8 were produced as recombinant proteins (rCor a 1.04 and rCor a 8). Sera from hazelnut allergic patients were collected in France (n = 5), Switzerland (n = 2), Greece (n = 11) and Spain (n = 3), within the Europrevall project. Total and allergen-specific IgE were quantified by enzyme allergosorbent test and IgE immunoblot were performed using pooled sera from birch-pollen endemic region or from Greece. Histamine Release (HR) assays were performed with stripped basophils passively sensitized with individual sera and challenged by a hazelnut extract or the different hazelnut allergens. Results As previously described, hazelnut allergic patients from Mediterranean countries are mainly sensitized to the nsLTP Cor a 8 whereas patients from France and Switzerland are sensitized to pollen-related allergens. Interestingly, an intermediate profile was evidenced in patients from Madrid. Hazelnut 7S globulin (Cor a 11) and 11S globulin (Cor a 9) were found to be minor allergens, recognized only by patients from Mediterranean countries. The biologic activity of the 4 tested allergens, analysed by HR assay, further confirmed the sensitization patterns, but also demonstrated the very high elicitation potency of Cor a 8. Conclusions This work, extending previously published researches, represents a step towards the better understanding of the complexity of hazelnut allergy and provides new data on the biological activity of hazelnut allergens and extracts. Electronic supplementary material The online version of this article (doi:10.1186/s13601-015-0066-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- F Blanc
- INRA-CEA, Service de Pharmacologie et d'Immunoanalyse, Laboratoire d'Immuno-Allergie Alimentaire, Bât. 136-CEA de Saclay, 91191 Gif-sur-Yvette, France
| | - H Bernard
- INRA-CEA, Service de Pharmacologie et d'Immunoanalyse, Laboratoire d'Immuno-Allergie Alimentaire, Bât. 136-CEA de Saclay, 91191 Gif-sur-Yvette, France
| | - S Ah-Leung
- INRA-CEA, Service de Pharmacologie et d'Immunoanalyse, Laboratoire d'Immuno-Allergie Alimentaire, Bât. 136-CEA de Saclay, 91191 Gif-sur-Yvette, France
| | - L Przybylski-Nicaise
- INRA-CEA, Service de Pharmacologie et d'Immunoanalyse, Laboratoire d'Immuno-Allergie Alimentaire, Bât. 136-CEA de Saclay, 91191 Gif-sur-Yvette, France
| | | | - A Purohit
- Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - F de Blay
- Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | | | - P Fritsche
- University Hospital Zurich, Zurich, Switzerland
| | | | - I Reig
- Hospital Clinico San Carlos, Madrid, Spain
| | - A Sinaniotis
- University of Athens & "Sotiria" Regional Chest Diseases Hospital of Athens, Athens, Greece
| | | | | | - S Vieths
- Paul-Ehrlich-Institut, Langen, Germany
| | - N Rigby
- Institute of Food Research, Norwich, UK
| | - C Mills
- University of Manchester, Manchester, UK
| | - K Adel-Patient
- INRA-CEA, Service de Pharmacologie et d'Immunoanalyse, Laboratoire d'Immuno-Allergie Alimentaire, Bât. 136-CEA de Saclay, 91191 Gif-sur-Yvette, France
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Bernard H, Hassan G, Beaudoin A, Baillargeon JD, Germain P. P-260 Complication rate of palliative colonic stenting for metastatic colorectal cancer. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv233.257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Adel‐Patient K, Ah‐Leung S, Bernard H, Verhasselt V. Immune status of the mother and early exposure through breastfeeding both influence the protection of the progeny from food allergy development to a major cow's milk allergen. Clin Transl Allergy 2015. [PMCID: PMC4412561 DOI: 10.1186/2045-7022-5-s3-p2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- Karine Adel‐Patient
- INRA, UR496, Unité d'Immuno‐Allergie AlimentaireIBiTecS/SPI/CEA de SaclayGif‐sur‐YvetteFrance
| | - Sandrine Ah‐Leung
- INRA, UR496, Unité d'Immuno‐Allergie AlimentaireIBiTecS/SPI/CEA de SaclayGif‐sur‐YvetteFrance
| | - Hervé Bernard
- INRA, UR496, Unité d'Immuno‐Allergie AlimentaireIBiTecS/SPI/CEA de SaclayGif‐sur‐YvetteFrance
| | - Valérie Verhasselt
- EA 6302 “Tolérance Immunitaire”Université de Nice Sophia‐AntipolisHôpital de l'ArchetNiceFrance
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Hazebrouck S, Ah-Leung S, Bidat E, Paty E, Drumare MF, Tilleul S, Adel-Patient K, Wal JM, Bernard H. Goat's milk allergy without cow's milk allergy: suppression of non-cross-reactive epitopes on caprine β-casein. Clin Exp Allergy 2014; 44:602-10. [PMID: 24372684 DOI: 10.1111/cea.12261] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2013] [Revised: 10/30/2013] [Accepted: 12/16/2013] [Indexed: 11/29/2022]
Abstract
BACKGROUND AND OBJECTIVE Goat's milk (GM) allergy associated with tolerance to cow's milk (CM) has been reported in patients without history of CM allergy and in CM-allergic children successfully treated with oral immunotherapy. The IgE antibodies from GM-allergic/CM-tolerant patients recognize caprine β-casein (βcap) without cross-reacting with bovine β-casein (βbov) despite a sequence identity of 91%. In this study, we investigated the non-cross-reactive IgE-binding epitopes of βcap. METHODS Recombinant βcap was genetically modified by substituting caprine domains with the bovine counterparts and by performing site-directed mutagenesis. We then evaluated the recognition of modified βcap by IgE antibodies from 11 GM-allergic/CM-tolerant patients and 11 CM-allergic patients or by monoclonal antibodies (mAb) raised against caprine caseins. The allergenic potency of modified βcap was finally assessed by degranulation tests of humanized rat basophil leukaemia (RBL)-SX38 cells. RESULTS Non-cross-reactive epitopes of βcap were found in domains 44-88 and 130-178. The substitutions A55T/T63P/L75P and P148H/S152P induced the greatest decrease in IgE reactivity of GM-allergic/CM-tolerant patients towards βcap. The pivotal role of threonine 63 was particularly revealed as its substitution also impaired the recognition of βcap by specific mAb, which could discriminate between βcap and βbov. The modified βcap containing the five substitutions was then unable to trigger the degranulation of RBL-SX38 cells passively sensitized with IgE antibodies from GM-allergic/CM-tolerant patients. CONCLUSIONS Although IgE-binding epitopes are spread all over βcap, a non-cross-linking version of βcap was generated with only five amino acid substitutions and could thus provide new insight for the design of hypoallergenic variants.
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Affiliation(s)
- S Hazebrouck
- INRA, UR 496, Unité d'Immuno-Allergie Alimentaire, CEA/iBiTeC-S/SPI, Gif-sur-Yvette, France
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Bernard H, Guillon B, Drumare MF, Paty E, Dreskin SC, Wal JM, Adel-Patient K, Hazebrouck S. Allergenicity of peanut component Ara h 2: Contribution of conformational versus linear hydroxyproline-containing epitopes. J Allergy Clin Immunol 2014; 135:1267-74.e1-8. [PMID: 25483599 DOI: 10.1016/j.jaci.2014.10.025] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Revised: 10/03/2014] [Accepted: 10/06/2014] [Indexed: 10/24/2022]
Abstract
BACKGROUND The 2S-albumin Ara h 2 is the most potent peanut allergen and a good predictor of clinical reactivity in allergic children. Posttranslational hydroxylation of proline residues occurs in DPYSP(OH)S motifs, which are repeated 2 or 3 times in different isoforms. OBJECTIVES We investigated the effect of proline hydroxylation on IgE binding and the relative contributions of linear and conformational epitopes to Ara h 2 allergenicity. METHODS Peptides containing DPYSP(OH)S motifs were synthesized. A recombinant variant of Ara h 2 without DPYSP(OH)S motifs was generated by means of deletion mutagenesis. IgE reactivity of 18 French and 5 American patients with peanut allergy toward synthetic peptides and recombinant allergens was assessed by using IgE-binding inhibition assays and degranulation tests of humanized rat basophilic leukemia cells. RESULTS Hydroxyproline-containing peptides exhibited an IgE-binding activity equivalent to that of the unfolded Ara h 2. In contrast, corresponding peptides without hydroxyprolines displayed a very weak IgE-binding capacity. Despite removal of the DPYSP(OH)S motifs, the deletion variant still displayed Ara h 2 conformational epitopes. The IgE-binding capacity of Ara h 2 was then recapitulated with an equimolar mixture of a hydroxylated peptide and the deletion variant. Hydroxylated peptides of 15 and 27 amino acid residues were also able to trigger cell degranulation. CONCLUSIONS Sensitization toward linear and conformational epitopes of Ara h 2 is variable among patients with peanut allergy. Optimal IgE binding to linear epitopes of Ara h 2 requires posttranslational hydroxylation of proline residues. The absence of hydroxyprolines could then affect the accuracy of component-resolved diagnostics by using rAra h 2.
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Affiliation(s)
- Hervé Bernard
- INRA, UR 496, Unité d'Immuno-Allergie Alimentaire, Jouy-en-Josas, France; CEA, iBiTecS/Service de Pharmacologie et d'Immunoanalyse, Gif-sur-Yvette, France
| | - Blanche Guillon
- INRA, UR 496, Unité d'Immuno-Allergie Alimentaire, Jouy-en-Josas, France; CEA, iBiTecS/Service de Pharmacologie et d'Immunoanalyse, Gif-sur-Yvette, France
| | - Marie-Françoise Drumare
- INRA, UR 496, Unité d'Immuno-Allergie Alimentaire, Jouy-en-Josas, France; CEA, iBiTecS/Service de Pharmacologie et d'Immunoanalyse, Gif-sur-Yvette, France
| | - Evelyne Paty
- Université Paris Descartes-Assistance Publique des Hôpitaux de Paris, Hôpital Necker Enfants Malades, Paris, France
| | - Stephen C Dreskin
- Division of Allergy and Clinical Immunology, Department of Medicine, University of Colorado Denver, Aurora, Colo
| | - Jean-Michel Wal
- INRA, UR 496, Unité d'Immuno-Allergie Alimentaire, Jouy-en-Josas, France; CEA, iBiTecS/Service de Pharmacologie et d'Immunoanalyse, Gif-sur-Yvette, France
| | - Karine Adel-Patient
- INRA, UR 496, Unité d'Immuno-Allergie Alimentaire, Jouy-en-Josas, France; CEA, iBiTecS/Service de Pharmacologie et d'Immunoanalyse, Gif-sur-Yvette, France
| | - Stéphane Hazebrouck
- INRA, UR 496, Unité d'Immuno-Allergie Alimentaire, Jouy-en-Josas, France; CEA, iBiTecS/Service de Pharmacologie et d'Immunoanalyse, Gif-sur-Yvette, France.
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Byrne L, Fisher I, Peters T, Mather A, Thomson N, Rosner B, Bernard H, McKeown P, Cormican M, Cowden J, Aiyedun V, Lane C. A multi-country outbreak of Salmonella Newport gastroenteritis in Europe associated with watermelon from Brazil, confirmed by whole genome sequencing: October 2011 to January 2012. ACTA ACUST UNITED AC 2014; 19:6-13. [PMID: 25138971 DOI: 10.2807/1560-7917.es2014.19.31.20866] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
In November 2011, the presence of Salmonella Newport in a ready-to-eat watermelon slice was confirmed as part of a local food survey in England. In late December 2011, cases of S. Newport were reported in England, Wales, Northern Ireland, Scotland, Ireland and Germany. During the outbreak, 63 confirmed cases of S. Newport were reported across all six countries with isolates indistinguishable by pulsed-field gel electrophoresis from the watermelon isolate.A subset of outbreak isolates were whole-genome sequenced and were identical to, or one single nucleotide polymorphism different from the watermelon isolate.In total, 46 confirmed cases were interviewed of which 27 reported watermelon consumption. Further investigations confirmed the outbreak was linked to the consumption of watermelon imported from Brazil.Although numerous Salmonella outbreaks associated with melons have been reported in the United States and elsewhere, this is the first of its kind in Europe.Expansion of the melon import market from Brazil represents a potential threat for future outbreaks. Whole genome sequencing is rapidly becoming more accessible and can provide a compelling level of evidence of linkage between human cases and sources of infection,to support public health interventions in global food markets.
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Affiliation(s)
- L Byrne
- Gastrointestinal, Emerging and Zoonotic Infections, Centre for Infectious Disease Surveillance and Control, Public Health England, Colindale, London, United Kingdom
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Wavrin S, Bernard H, Wal JM, Adel-Patient K. Cutaneous or respiratory exposures to peanut allergens in mice and their impacts on subsequent oral exposure. Int Arch Allergy Immunol 2014; 164:189-99. [PMID: 25034179 DOI: 10.1159/000363444] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Accepted: 05/07/2014] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Recent data suggested that non-gastrointestinal exposure can lead to sensitisation to food allergens. We thus assessed the immune impact of respiratory or cutaneous exposure to peanut proteins on non-altered epithelium and investigated the effect of such pre-exposure on subsequent oral administration of peanut. METHODS BALB/cJ mice were exposed to purified Ara h 1 or to a non-defatted roasted peanut extract (PE) by simple deposit of allergens solutions on non-altered skin or in the nostrils. Exposures were performed 6 times at weekly intervals. Pre-exposed mice then received intra-gastric administrations of PE alone or in the presence of the Th2 mucosal adjuvant cholera toxin (CT). The specific humoral and cellular immune response was assessed throughout the protocol. RESULTS Both cutaneous and respiratory exposures led to the production of specific IgG1. Local and systemic IL-5 and IL-13 production were also evidenced, demonstrating activation of specific Th2 cells. This effect was dose-dependent and most efficient via the respiratory route. Moreover, these pre-exposures led to the production of specific IgE antibodies after gavage with PE, whatever the presence of CT. CONCLUSIONS Cutaneous or respiratory exposures to peanut induce Th2 priming in mice. Moreover, pre-exposures promote further sensitisation via the oral route without the use of CT; this proposes a new adjuvant-free experimental model of sensitisation to food that may reflect a realistic exposure pattern in infants. These results also suggest that non-gastrointestinal peanut exposure should be minimised in high-risk infants, even those with non-altered skin, to potentially reduce allergic sensitisation to this major food allergen.
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Affiliation(s)
- Sophie Wavrin
- INRA, UR496 Immuno-Allergie Alimentaire, CEA/IBiTeC-S/SPI, CEA de Saclay, Gif-sur-Yvette, France
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Bernard H, Ah-Leung S, Drumare MF, Feraudet-Tarisse C, Verhasselt V, Wal JM, Créminon C, Adel-Patient K. Peanut allergens are rapidly transferred in human breast milk and can prevent sensitization in mice. Allergy 2014; 69:888-97. [PMID: 24773443 DOI: 10.1111/all.12411] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/10/2014] [Indexed: 12/29/2022]
Abstract
BACKGROUND Food allergens have been evidenced in breast milk under physiological conditions, but the kinetic and the role of this passage in food allergies are still unclear. We then aimed to analyze the passage of peanut allergens in human breast milk and their allergenicity/immunomodulatory properties. METHODS Human breast milk was collected from two non-atopic peanut-tolerant mothers before and at different time points after ingestion of 30 g of commercial roasted peanut. Ara h 6, Ara h 6 immune complexes, and the IgE binding capacity of breast milk samples were measured using specific immunoassays. Their allergenic functionality was then assessed using cell-based assay. Finally, human breast milk obtained before or after peanut ingestion was administered intragastrically to BALB/c mice at different ages, and mice were further experimentally sensitized to peanut using cholera toxin. RESULTS Ara h 6 is detected as soon as 10 min after peanut ingestion, with peak values observed within the first hour after ingestion. The transfer is long-lasting, small quantities of peanut allergens being detected over a 24-h period. IgG-Ara h 6 and IgA-Ara h 6 immune complexes are evidenced, following a different kinetic of excretion than free allergens. Peanut allergens transferred in milk are IgE reactive and can induce an allergic reaction in vitro. However, administration of human breast milk to young mice, notably before weaning, does not lead to sensitization, but instead to partial oral tolerance. CONCLUSION The low quantities of immunologically active allergens transferred through breast milk may prevent instead of priming allergic sensitization to peanut.
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Affiliation(s)
- H. Bernard
- INRA; UR496 Unité d'Immuno-Allergie Alimentaire; Jouy-en-Josas France
- CEA; IBiTecS; Service de Pharmacologie et d'Immunoanalyse; Gif-sur-Yvette France
| | - S. Ah-Leung
- INRA; UR496 Unité d'Immuno-Allergie Alimentaire; Jouy-en-Josas France
- CEA; IBiTecS; Service de Pharmacologie et d'Immunoanalyse; Gif-sur-Yvette France
| | - M.-F. Drumare
- INRA; UR496 Unité d'Immuno-Allergie Alimentaire; Jouy-en-Josas France
- CEA; IBiTecS; Service de Pharmacologie et d'Immunoanalyse; Gif-sur-Yvette France
| | - C. Feraudet-Tarisse
- CEA; IBiTecS; Service de Pharmacologie et d'Immunoanalyse; Gif-sur-Yvette France
| | - V. Verhasselt
- EA 6302 Tolérance Immunitaire; Hôpital de l'Archet; Université de Nice Sophia-Antipolis; Nice France
| | - J.-M. Wal
- INRA; UR496 Unité d'Immuno-Allergie Alimentaire; Jouy-en-Josas France
- CEA; IBiTecS; Service de Pharmacologie et d'Immunoanalyse; Gif-sur-Yvette France
| | - C. Créminon
- CEA; IBiTecS; Service de Pharmacologie et d'Immunoanalyse; Gif-sur-Yvette France
| | - K. Adel-Patient
- INRA; UR496 Unité d'Immuno-Allergie Alimentaire; Jouy-en-Josas France
- CEA; IBiTecS; Service de Pharmacologie et d'Immunoanalyse; Gif-sur-Yvette France
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Bernard H, Faber M, Wilking H, Haller S, Höhle M, Schielke A, Ducomble T, Siffczyk C, Merbecks SS, Fricke G, Hamouda O, Stark K, Werber D, on behalf of the Outbreak Investigation Team. Large multistate outbreak of norovirus gastroenteritis associated with frozen strawberries, Germany, 2012. Euro Surveill 2014; 19:20719. [DOI: 10.2807/1560-7917.es2014.19.8.20719] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
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Affiliation(s)
- H Bernard
- Robert Koch Institute, Berlin, Germany
- These authors contributed equally
| | - M Faber
- These authors contributed equally
- Robert Koch Institute, Berlin, Germany
| | - H Wilking
- Robert Koch Institute, Berlin, Germany
| | - S Haller
- European Programme for Intervention Epidemiology, Stockholm, Sweden
- Postgraduate Training for Applied Epidemiology, Berlin, Germany
- Robert Koch Institute, Berlin, Germany
| | - M Höhle
- Robert Koch Institute, Berlin, Germany
| | | | - T Ducomble
- European Centre for Disease Prevention and Control, Stockholm, Sweden
- European Programme for Intervention Epidemiology, Stockholm, Sweden
- Robert Koch Institute, Berlin, Germany
| | - C Siffczyk
- State Health Authority Brandenburg, Zossen, Germany
| | - S S Merbecks
- State Health Authority Saxony, Chemnitz, Germany
| | - G Fricke
- Federal Office of Consumer Protection and Food Safety, Berlin, Germany
| | - O Hamouda
- Robert Koch Institute, Berlin, Germany
| | - K Stark
- Robert Koch Institute, Berlin, Germany
| | - D Werber
- Robert Koch Institute, Berlin, Germany
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Werber D, Bernard H. Reducing the barriers against analytical epidemiological studies in investigations of local foodborne disease outbreaks in Germany – a starter kit for local health authorities. Euro Surveill 2014; 19:20714. [DOI: 10.2807/1560-7917.es2014.19.8.20714] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
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Affiliation(s)
- D Werber
- Department of Infectious Disease Epidemiology, Robert Koch-Institut, Berlin, Germany
| | - H Bernard
- Department of Infectious Disease Epidemiology, Robert Koch-Institut, Berlin, Germany
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Bayer C, Bernard H, Prager R, Rabsch W, Hiller P, Malorny B, Pfefferkorn B, Frank C, de Jong A, Friesema I, Stark K, Rosner BM. An outbreak of Salmonella Newport associated with mung bean sprouts in Germany and the Netherlands, October to November 2011. Euro Surveill 2014; 19. [DOI: 10.2807/1560-7917.es2014.19.1.20665] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
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Affiliation(s)
- C Bayer
- Robert Koch Institute, Department for Infectious Disease Epidemiology, Berlin, Germany
- European Programme for Intervention Epidemiology Training (EPIET), European Centre for Disease Prevention and Control, (ECDC), Stockholm, Sweden
- Postgraduate Training for Applied Epidemiology (PAE, German Field Epidemiology Training Programme), Robert Koch Institute, Berlin, Germany
| | - H Bernard
- Robert Koch Institute, Department for Infectious Disease Epidemiology, Berlin, Germany
| | - R Prager
- Robert Koch Institute, Division of Bacterial Infections and National Reference Centre for Salmonella and other Bacterial Enteric Pathogens, Wernigerode, Germany
| | - W Rabsch
- Robert Koch Institute, Division of Bacterial Infections and National Reference Centre for Salmonella and other Bacterial Enteric Pathogens, Wernigerode, Germany
| | - P Hiller
- Federal Institute for Risk Assessment, Department of Biological Safety, Berlin, Germany
| | - B Malorny
- Federal Institute for Risk Assessment, Department of Biological Safety, Berlin, Germany
| | - B Pfefferkorn
- Federal Office of Consumer Protection and Food Safety, Berlin, Germany
| | - C Frank
- Robert Koch Institute, Department for Infectious Disease Epidemiology, Berlin, Germany
| | - A de Jong
- Dutch Food and Consumer Product Safety Authority (NVWA), Utrecht, the Netherlands
| | - I Friesema
- The National Institute for Public Health and the Environment (RIVM), Centre for Infectious Disease Control, Bilthoven, the Netherlands
| | - K Stark
- Robert Koch Institute, Department for Infectious Disease Epidemiology, Berlin, Germany
| | - B M Rosner
- Robert Koch Institute, Department for Infectious Disease Epidemiology, Berlin, Germany
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Hazebrouck S, Ah-Leung S, Bidat E, Paty E, Drumare MF, Tilleul S, Adel-Patient K, Wal JM, Bernard H. Mutational analysis of immunodominant epitopes of caprine β-casein recognized by IgE antibodies from patients allergic to goat’s milk and tolerant to cow’s milk. Clin Transl Allergy 2013. [PMCID: PMC3723415 DOI: 10.1186/2045-7022-3-s3-o11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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41
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Adel-Patient K, Nutten S, Bernard H, Fritsché R, Ah-Leung S, Meziti N, Prioult G, Mercenier A, Wal JM. Immunomodulatory potential of partially hydrolyzed β-lactoglobulin and large synthetic peptides. J Agric Food Chem 2012; 60:10858-10866. [PMID: 23043375 DOI: 10.1021/jf3031293] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The immunomodulatory potential of fragments derived from the cow's milk allergen bovine β-lactoglobulin (BLG) was assessed in a mouse model of oral tolerance (OT) [Adel-Patient, K.; Wavrin, S.; Bernard, H.; Meziti, N.; Ah-Leung, S.; Wal, J. M. Oral tolerance and Treg cells are induced in BALB/c mice after gavage with bovine β-lactoglobulin. Allergy 2011, 66 (10), 1312-1321]. Native BLG (nBLG) and chemically denatured BLG (lacking S-S bridges, dBLG), products resulting from their hydrolysis using cyanogen bromide (CNBr) and some synthetic peptides, were produced and precisely characterized. CNBr hydrolysates correspond to pools of peptides of various sizes that are still associated by S-S bridges when derived from nBLG. nBLG, dBLG, and CNBr hydrolysate of nBLG efficiently prevented further sensitization. CNBr hydrolysate of dBLG was less efficient, suggesting that the association by S-S bridges of peptides increased their immunomodulatory potential. Conversely, synthetic peptides were inefficient even if covering 50% of the BLG sequence, demonstrating that the immunomodulatory potential requires the presence of all derived fragments of BLG and further supporting the use of partially hydrolyzed milk proteins to favor OT induction in infants with a risk of atopy.
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Affiliation(s)
- Karine Adel-Patient
- INRA, UR496 Immuno-Allergie Alimentaire, CEA/IBiTeC-S/SPI, CEA de Saclay, F-91191 Gif sur Yvette cedex, France.
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Morin S, Fischer R, Przybylski-Nicaise L, Bernard H, Corthier G, Rabot S, Wal JM, Hazebrouck S. Delayed bacterial colonization of the gut alters the host immune response to oral sensitization against cow's milk proteins. Mol Nutr Food Res 2012; 56:1838-47. [PMID: 23065810 DOI: 10.1002/mnfr.201200412] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Revised: 09/03/2012] [Accepted: 09/07/2012] [Indexed: 11/07/2022]
Abstract
SCOPE Cow's milk allergy is the most prevalent food allergy in infants whose immune system development is critically stimulated during postnatal gut colonization by commensal bacteria. Allergenic potential of cow's milk β-lactoglobulin (BLG) and caseins (CAS) was investigated in germ-free (GF) BALB/c mice and in GF mice conventionalized (CVd) at 6 weeks of age. METHODS AND RESULTS Oral sensitization to cow's milk in the presence of cholera toxin led to higher BLG-specific IgE, IgG1, and IgG2a responses in GF mice than in conventional (CV) mice. No significant difference was observed for CAS-specific IgE responses although IgG1 responses to αS1- and κ-caseins were higher in GF mice than in CV mice. CVd mice, orally inoculated with fecal preparations from CV mice, also displayed biased antibody responses compared to CV mice. Secretion of Th2 cytokines by BLG- and CAS-reactivated splenocytes of CVd mice was similar to that of GF mice whereas cytokine production by reactivated cells from mesenteric lymph nodes of CVd mice was equivalent to that of CV mice. CONCLUSION Oral sensitization to BLG and CAS was differentially affected by the absence of gut microbiota and delayed bacterial colonization altered persistently the host immune response to oral sensitization against food antigens.
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Affiliation(s)
- Stéphanie Morin
- INRA, UR 496 - Immuno-Allergie Alimentaire, CEA/iBiTeC-S/SPI, CEA de Saclay, Gif-sur-Yvette, France
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Bernard H, Ah-Leung S, Tilleul S, Drumare MF, Paty E, Bidat E, Wal JM, Hazebrouck S. Specificity of IgE antibodies from patients allergic to goat's milk and tolerant to cow's milk determined with plasmin-derived peptides of bovine and caprine β-caseins. Mol Nutr Food Res 2012; 56:1532-40. [DOI: 10.1002/mnfr.201200229] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2012] [Revised: 07/09/2012] [Accepted: 07/10/2012] [Indexed: 11/11/2022]
Affiliation(s)
- Hervé Bernard
- INRA, UR 496; Unité d'Immuno-Allergie Alimentaire; CEA/iBiTeC-S/SPI; CEA de Saclay; Gif-sur-Yvette France
| | - Sandrine Ah-Leung
- INRA, UR 496; Unité d'Immuno-Allergie Alimentaire; CEA/iBiTeC-S/SPI; CEA de Saclay; Gif-sur-Yvette France
| | - Sylvain Tilleul
- INRA, UR 496; Unité d'Immuno-Allergie Alimentaire; CEA/iBiTeC-S/SPI; CEA de Saclay; Gif-sur-Yvette France
| | - Marie-Françoise Drumare
- INRA, UR 496; Unité d'Immuno-Allergie Alimentaire; CEA/iBiTeC-S/SPI; CEA de Saclay; Gif-sur-Yvette France
| | - Evelyne Paty
- Université Paris Descartes, Assistance Publique des Hôpitaux de Paris; Hôpital Necker Enfants Malades; Paris France
| | - Etienne Bidat
- Service de Pédiatrie; Assistance Publique des Hôpitaux de Paris; Hôpital Ambroise Paré; Boulogne France
| | - Jean-Michel Wal
- INRA, UR 496; Unité d'Immuno-Allergie Alimentaire; CEA/iBiTeC-S/SPI; CEA de Saclay; Gif-sur-Yvette France
| | - Stéphane Hazebrouck
- INRA, UR 496; Unité d'Immuno-Allergie Alimentaire; CEA/iBiTeC-S/SPI; CEA de Saclay; Gif-sur-Yvette France
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Holzmann T, Frangoulidis D, Simon M, Noll P, Schmoldt S, Hanczaruk M, Grass G, Pregler M, Sing A, Hörmansdorfer S, Bernard H, Grunow R, Zimmermann R, Schneider-Brachert W, Gessner A, Reischl U. Fatal anthrax infection in a heroin user from southern Germany, June 2012. Euro Surveill 2012; 17:20204. [PMID: 22790532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023] Open
Abstract
Blood cultures from a heroin user who died in June 2012, a few hours after hospital admission, due to acute septic disease, revealed the presence of Bacillus anthracis. This report describes the extended diagnosis by MALDI-TOF and real-time PCR and rapid confirmation of the anthrax infection through reference laboratories. Physicians and diagnostic laboratories were informed and alerted efficiently through the reporting channels of German public health institutions, which is essential for the prevention of further cases.
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Affiliation(s)
- T Holzmann
- Institute of Medical Microbiology and Hygiene, University Hospital of Regensburg, Germany.
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Holzmann T, Frangoulidis D, Simon M, Noll P, Schmoldt S, Hanczaruk M, Grass G, Pregler M, Sing A, Hörmansdorfer S, Bernard H, Grunow R, Zimmermann R, Schneider-Brachert W, Gessner A, Reischl U. Fatal anthrax infection in a heroin user from southern Germany, June 2012. Euro Surveill 2012. [DOI: 10.2807/ese.17.26.20204-en] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Blood cultures from a heroin user who died in June 2012, a few hours after hospital admission, due to acute septic disease, revealed the presence of Bacillus anthracis. This report describes the extended diagnosis by MALDI-TOF and real-time PCR and rapid confirmation of the anthrax infection through reference laboratories. Physicians and diagnostic laboratories were informed and alerted efficiently through the reporting channels of German public health institutions, which is essential for the prevention of further cases.
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Affiliation(s)
- T Holzmann
- Institute of Medical Microbiology and Hygiene, University Hospital of Regensburg, Regensburg, Germany
| | | | - M Simon
- Institute of Medical Microbiology and Hygiene, University Hospital of Regensburg, Regensburg, Germany
| | - P Noll
- Krankenhaus der Barmherzigen Brüder, Regensburg, Germany
| | - S Schmoldt
- Bundeswehr Institute of Microbiology, Munich, Germany
| | - M Hanczaruk
- Bundeswehr Institute of Microbiology, Munich, Germany
| | - G Grass
- Bundeswehr Institute of Microbiology, Munich, Germany
| | - M Pregler
- District Health Office, Regensburg, Germany
| | - A Sing
- Bavarian Health and Food Safety Authority (LGL), Oberschleißheim, Germany
| | - S Hörmansdorfer
- Bavarian Health and Food Safety Authority (LGL), Oberschleißheim, Germany
| | - H Bernard
- Robert-Koch Institute, Berlin, Germany
| | - R Grunow
- Robert-Koch Institute, Berlin, Germany
| | | | - W Schneider-Brachert
- Institute of Medical Microbiology and Hygiene, University Hospital of Regensburg, Regensburg, Germany
| | - A Gessner
- Institute of Medical Microbiology and Hygiene, University Hospital of Regensburg, Regensburg, Germany
| | - U Reischl
- Institute of Medical Microbiology and Hygiene, University Hospital of Regensburg, Regensburg, Germany
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Bernard H, Garmy-Susini B, Ainaoui N, Van Den Berghe L, Peurichard A, Javerzat S, Bikfalvi A, Lane DP, Bourdon JC, Prats AC. The p53 isoform, Δ133p53α, stimulates angiogenesis and tumour progression. Oncogene 2012; 32:2150-60. [PMID: 22733133 DOI: 10.1038/onc.2012.242] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The tumour suppressor p53, involved in DNA repair, cell cycle arrest and apoptosis, also inhibits blood vessel formation, that is, angiogenesis, a process strongly contributing to tumour development. The p53 gene expresses 12 different proteins (isoforms), including TAp53 (p53 (or p53α), p53β and p53γ) and Δ133p53 isoforms (Δ133p53α, Δ133p53β and Δ133p53γ). The Δ133p53α isoform was shown to modulate p53 transcriptional activity and is overexpressed in various human tumours. However, its role in tumour progression is still unexplored. In the present study, we examined the involvement of Δ133p53 isoforms in tumoural angiogenesis and tumour growth in the highly angiogenic human glioblastoma U87. Our data show that conditioned media from U87 cells depleted for Δ133p53 isoforms block endothelial cell migration and tubulogenesis without affecting endothelial cell proliferation in vitro. The Δ133p53 depletion in U2OS osteosarcoma cells resulted in a similar angiogenesis blockade. Furthermore, using conditioned media from U87 cells ectopically expressing each Δ133p53 isoform, we determined that Δ133p53α and Δ133p53γ but not Δ133p53β, stimulate angiogenesis. Our in vivo data using the chicken chorio-allantoic membrane and mice xenografts establish that angiogenesis and growth of glioblastoma U87 tumours are inhibited upon depletion of Δ133p53 isoforms. By TaqMan low-density array, we show that alteration of expression ratio of Δ133p53 and TAp53 isoforms differentially regulates angiogenic gene expression with Δ133p53 isoforms inducing pro-angiogenic gene expression and repressing anti-angiogenic gene expression.
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Affiliation(s)
- H Bernard
- Université de Toulouse, UPS, TRADGENE, Laboratory of Translational Control and Gene Therapy of Vascular Diseases, EA4554, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France
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Hazebrouck S, Guillon B, Drumare MF, Paty E, Wal JM, Bernard H. Trypsin resistance of the major peanut allergen Ara h 6 and allergenicity of the digestion products are abolished after selective disruption of disulfide bonds. Mol Nutr Food Res 2012; 56:548-57. [DOI: 10.1002/mnfr.201100614] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Stéphane Hazebrouck
- INRA, UR 496, Unité d’Immuno-Allergie Alimentaire, CEA/iBiTeC-S/SPI, CEA de Saclay; Gif-sur-Yvette France
| | - Blanche Guillon
- INRA, UR 496, Unité d’Immuno-Allergie Alimentaire, CEA/iBiTeC-S/SPI, CEA de Saclay; Gif-sur-Yvette France
| | - Marie-Françoise Drumare
- INRA, UR 496, Unité d’Immuno-Allergie Alimentaire, CEA/iBiTeC-S/SPI, CEA de Saclay; Gif-sur-Yvette France
| | - Evelyne Paty
- Université Paris Descartes Assistance Publique des Hôpitaux de Paris; Hôpital Necker Enfants Malades; Paris France
| | - Jean-Michel Wal
- INRA, UR 496, Unité d’Immuno-Allergie Alimentaire, CEA/iBiTeC-S/SPI, CEA de Saclay; Gif-sur-Yvette France
| | - Hervé Bernard
- INRA, UR 496, Unité d’Immuno-Allergie Alimentaire, CEA/iBiTeC-S/SPI, CEA de Saclay; Gif-sur-Yvette France
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Hazebrouck S, Ah-Leung S, Paty E, Bidat E, Drumare M, Tilleul S, Adel-Patient K, Wal J, Bernard H. Identification of Structural Determinants Supporting The Absence of IgE Cross-Reactivity Between Caprine and Bovine β-Caseins In Patients Allergic to Goat's Milk But Tolerant To Cow's Milk. J Allergy Clin Immunol 2012. [DOI: 10.1016/j.jaci.2011.12.256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Adel-Patient K, Bernard H, Wavrin S, Ah-Leung S, Wal J. The Gut Mucosa Microenvironment Affects Allergic Sensitization vs tolerance to Food proteins. J Allergy Clin Immunol 2012. [DOI: 10.1016/j.jaci.2011.12.067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Adel-Patient K, Bernard H, Wavrin S, Ah-Leung S, Wal JM. Oral tolerance and functional Treg cells are induced in BALB/c mice after gavage with bovine β-lactoglobulin (BLG). Clin Transl Allergy 2011. [PMCID: PMC3354166 DOI: 10.1186/2045-7022-1-s1-p37] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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