1
|
Rathahao-Paris E, Abdoun S, Paris A, Guillon B, Venot E, Fenaille F, Adel-Patient K, Alves S. Innovative direct introduction-ion mobility-mass spectrometry (DI-IM-MS) approach for fast and robust isomer-specific quantification in a complex matrix: Application to 2'-fucosyllactose (2'-FL) in breast milk. JOURNAL OF MASS SPECTROMETRY : JMS 2024; 59:e5026. [PMID: 38656572 DOI: 10.1002/jms.5026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 02/29/2024] [Accepted: 03/11/2024] [Indexed: 04/26/2024]
Abstract
Identification and specific quantification of isomers in a complex biological matrix by mass spectrometry alone is not an easy task due to their identical chemical formula and therefore their same mass-to-charge ratio (m/z). Here, the potential of direct introduction combined with ion mobility-mass spectrometry (DI-IM-MS) for rapid quantification of isomers as human milk oligosaccharides (HMOs) was investigated. Differences in HMO profiles between various analyzed breast milk samples were highlighted using the single ion mobility monitoring (SIM2) acquisition for high ion mobility resolution detection. Furthermore, the Se+ (secretor) or Se- (non-secretor) phenotype could be assigned to breast milk samples studied based on their HMO contents, especially on the response of 2'-fucosyllactose (2'-FL) and lacto-N-fucopentaose I (LNFP I). The possibility of quantifying a specific isomer in breast milk by DI-IM-MS was also investigated. The standard addition method allowed the determination of the 2'-FL despite the presence of other oligosaccharides, including 3-fucosyllactose (3-FL) isomer in breast milk. This proof-of-concept study demonstrated the high potential of such an approach for the rapid and convenient quantification of isomers in complex mixtures.
Collapse
Affiliation(s)
- Estelle Rathahao-Paris
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI, MetaboHUB, Gif-sur-Yvette, France
- Sorbonne Université, Faculté des Sciences et de l'Ingénierie, Institut Parisien de Chimie Moléculaire (IPCM), Paris, France
| | - Sarah Abdoun
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI, MetaboHUB, Gif-sur-Yvette, France
- Sorbonne Université, Faculté des Sciences et de l'Ingénierie, Institut Parisien de Chimie Moléculaire (IPCM), Paris, France
| | - Alain Paris
- Muséum national d'Histoire naturelle, MCAM, UMR7245 CNRS - MNHN, Paris, France
| | - Blanche Guillon
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI, MetaboHUB, Gif-sur-Yvette, France
| | - Eric Venot
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI, MetaboHUB, Gif-sur-Yvette, France
| | - François Fenaille
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI, MetaboHUB, Gif-sur-Yvette, France
| | - Karine Adel-Patient
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI, MetaboHUB, Gif-sur-Yvette, France
| | - Sandra Alves
- Sorbonne Université, Faculté des Sciences et de l'Ingénierie, Institut Parisien de Chimie Moléculaire (IPCM), Paris, France
| |
Collapse
|
2
|
Issa M, Rivière G, Houdeau E, Adel-Patient K. Perinatal exposure to foodborne inorganic nanoparticles: A role in the susceptibility to food allergy? FRONTIERS IN ALLERGY 2022; 3:1067281. [PMID: 36545344 PMCID: PMC9760876 DOI: 10.3389/falgy.2022.1067281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 11/14/2022] [Indexed: 12/12/2022] Open
Abstract
Food allergy (FA) is an inappropriate immune response against dietary antigens. Various environmental factors during perinatal life may alter the establishment of intestinal homeostasis, thereby predisposing individuals to the development of such immune-related diseases. Among these factors, recent studies have emphasized the chronic dietary exposure of the mother to foodborne inorganic nanoparticles (NP) such as nano-sized silicon dioxide (SiO2), titanium dioxide (TiO2) or silver (Ag). Indeed, there is growing evidence that these inorganic agents, used as food additives in various products, as processing aids during food manufacturing or in food contact materials, can cross the placental barrier and reach the developing fetus. Excretion in milk is also suggested, hence continuing to expose the neonate during a critical window of susceptibility. Due to their immunotoxical and biocidal properties, such exposure may disrupt the host-intestinal microbiota's beneficial exchanges and may interfere with intestinal barrier and gut-associated immune system development in fetuses then the neonates. The resulting dysregulated intestinal homeostasis in the infant may significantly impede the induction of oral tolerance, a crucial process of immune unresponsiveness to food antigens. The current review focuses on the possible impacts of perinatal exposure to foodborne NP during pregnancy and early life on the susceptibility to developing FA.
Collapse
Affiliation(s)
- Mohammad Issa
- Département Médicaments et Technologies Pour la Santé (MTS), SPI/Laboratoire d’Immuno-Allergie Alimentaire, Université Paris-Saclay, CEA, INRAE, Gif-sur-Yvette, France
| | - Gilles Rivière
- French Agency for Food, Environmental and Occupational Health & Safety (ANSES, Agence Nationale De Sécurité Sanitaire De l’alimentation, De l’environnement et du Travail), 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
- Département Médicaments et Technologies Pour la Santé (MTS), SPI/Laboratoire d’Immuno-Allergie Alimentaire, Université Paris-Saclay, CEA, INRAE, Gif-sur-Yvette, France,Correspondence: Karine Adel-Patient
| |
Collapse
|
3
|
Luskin K, Mortazavi D, Bai-Tong S, Bertrand K, Chambers C, Schulkers-Escalante K, Ahmad A, Luedtke S, O'Donoghue AJ, Ghassemian M, Geng B, Leibel SL, Leibel SA. Allergen Content and Protease Activity in Milk Feeds from Mothers of Preterm Infants. Breastfeed Med 2022; 17:947-957. [PMID: 36251466 PMCID: PMC10081709 DOI: 10.1089/bfm.2022.0115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Rationale: There is little information regarding the allergen content of milk feeds in the preterm population. Previous studies have not performed a broad analysis of the allergenic peptide content and protease activity of milk feeds in this population. Methods: To evaluate feasibility, we initially performed mass spectrometry on 4 human milk (HM) samples (2 term and 2 preterm) from the Mommy's Milk Human Milk Biorepository (HMB) and analyzed the results against the University of Nebraska FASTA database and UniProt for a total of 2,211 protein sequences. We then further analyzed five samples from the Microbiome, Atopy, and Prematurity (MAP) study including peptidomic and protease activity analysis. Results: Each HMB sample had between 806 and 1,007 proteins, with 37-44 nonhuman proteins/sample encompassing 26 plant and animal species. In the preterm MAP samples, 784 digested nonhuman proteins were identified, 30 were nonbovine in origin. Proteins from 23 different species including aeroallergens, food, and contact allergens were identified. Protease activity was highest in HM samples without human milk fortifier and lowest in preterm formula. Conclusions: These findings represent the first preterm milk feed mass spectrometry and protease analysis with identification of known allergenic proteins to food, contact, and aeroallergens. These results raise questions of whether the composition of milk feeds in the neonatal intensive care unit impact the development of atopic disease in the preterm population and whether the complex interaction between allergens, proteases, and other HM components can serve to induce sensitization or tolerance to allergens in infants. Clinical Trial Registration Number: NCT04835935.
Collapse
Affiliation(s)
| | - Diba Mortazavi
- Department of Pediatrics, University of California San Diego, La Jolla, California, USA
| | - Sherry Bai-Tong
- Department of Pediatrics, University of California San Diego, La Jolla, California, USA
| | - Kerri Bertrand
- Department of Pediatrics, University of California San Diego, La Jolla, California, USA
| | - Christina Chambers
- Department of Pediatrics, University of California San Diego, La Jolla, California, USA
| | | | - Alla Ahmad
- Department of Pediatrics, University of California San Diego, La Jolla, California, USA
| | - Stephanie Luedtke
- Department of Pediatrics, University of California San Diego, La Jolla, California, USA
| | - Anthony J. O'Donoghue
- Department of Pediatrics, University of California San Diego, La Jolla, California, USA
| | - Majid Ghassemian
- Department of Pediatrics, University of California San Diego, La Jolla, California, USA
| | - Bob Geng
- Department of Pediatrics, University of California San Diego, La Jolla, California, USA
| | - Sandra L. Leibel
- Department of Pediatrics, University of California San Diego, La Jolla, California, USA
| | - Sydney A. Leibel
- Department of Pediatrics, University of California San Diego, La Jolla, California, USA
| |
Collapse
|
4
|
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: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [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.
Collapse
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
| |
Collapse
|
5
|
Palmer DJ, Sullivan TR, Campbell DE, Nanan R, Gold MS, Hsu PS, Netting MJ, McWilliam V, Koplin JJ, Perrett KP, Quinn P, O'Sullivan M, Prescott SL, Grivell R, Makrides M. PrEggNut Study: protocol for a randomised controlled trial investigating the effect of a maternal diet rich in eggs and peanuts from <23 weeks' gestation during pregnancy to 4 months' lactation on infant IgE-mediated egg and peanut allergy outcomes. BMJ Open 2022; 12:e056925. [PMID: 35697444 PMCID: PMC9196184 DOI: 10.1136/bmjopen-2021-056925] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
INTRODUCTION Clinical studies supported by immunological data indicate early life intervention strategies to be promising in reducing the growing global burden of food allergies. The events that predispose to food allergy, including the induction of allergen-specific immune responses, appear to be initiated early in development. Early exposure to food allergens in utero and via breast milk is likely to be important in initiating oral tolerance. We aim to determine the effectiveness of higher maternal food allergen consumption during pregnancy and lactation on infant food allergy outcomes. METHODS AND ANALYSIS This is a multisite, parallel, two-arm (1:1 allocation), single-blinded (outcome assessors, statistical analyst and investigators), randomised controlled trial. Pregnant women (<23 weeks' gestation) whose (unborn) infants have at least two biological family members (mother, father or siblings) with medically diagnosed allergic disease are eligible to participate. After obtaining written informed consent, pregnant women are randomised to either a high egg and peanut diet (at least 6 eggs and 60 peanuts per week) or standard (low) egg and peanut diet (no more than 3 eggs and 30 peanuts per week). The women are asked to follow their allocated diet from <23 weeks' gestation to 4 months' lactation. The primary outcome is food challenge proven IgE-mediated egg and/or peanut allergy in the infants at 12 months of age. Key secondary outcomes include infant sensitisation to egg and/or peanut and infant eczema. Our target sample size is 2136 women. Analyses will be performed on an intention-to-treat basis according to a pre-specified statistical analysis plan. ETHICS AND DISSEMINATION Ethical approval has been granted from the Women's and Children's Health Network Human Research Ethics Committee (approval number HREC/18/WCHN/42). Trial results will be presented at scientific conferences and published in peer-reviewed journals. TRIAL REGISTRATION NUMBER Australian New Zealand Clinical Trials Registry ACTRN12618000937213.
Collapse
Affiliation(s)
- Debra J Palmer
- Telethon Kids Institute, The University of Western Australia, Nedlands, Western Australia, Australia
- UWA Medical School, The University of Western Australia, Perth, Western Australia, Australia
| | - Thomas R Sullivan
- SAHMRI Women and Kids, South Australian Health and Medical Research Institute, Adelaide, South Australia, Australia
- School of Public Health, The University of Adelaide, Adelaide, South Australia, Australia
| | - Dianne E Campbell
- Discipline of Child and Adolescent Health, The University of Sydney, Lidcombe, New South Wales, Australia
- Department of Allergy and Immunology; and Kids Research, The Children's Hospital at Westmead, Westmead, New South Wales, Australia
| | - Ralph Nanan
- Charles Perkins Center, The University of Sydney, Sydney, New South Wales, Australia
- Sydney Medical School Nepean, The University of Sydney, Sydney, New South Wales, Australia
| | - Michael S Gold
- Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, South Australia, Australia
- Department of Allergy and Clinical Immunology, Women's and Children's Health Network, North Adelaide, South Australia, Australia
| | - Peter S Hsu
- Discipline of Child and Adolescent Health, The University of Sydney, Lidcombe, New South Wales, Australia
- Department of Allergy and Immunology; and Kids Research, The Children's Hospital at Westmead, Westmead, New South Wales, Australia
| | - Merryn J Netting
- SAHMRI Women and Kids, South Australian Health and Medical Research Institute, Adelaide, South Australia, Australia
- Department of Nutrition, Women's and Children's Health Network, North Adelaide, South Australia, Australia
| | - Vicki McWilliam
- Murdoch Childrens Research Institute, Parkville, Victoria, Australia
- Department of Allergy and Immunology, The Royal Children's Hospital Melbourne, Parkville, Victoria, Australia
| | - Jennifer J Koplin
- Murdoch Childrens Research Institute, Parkville, Victoria, Australia
- Department of Paediatrics, The University of Melbourne, Melbourne, Victoria, Australia
| | - Kirsten P Perrett
- Department of Allergy and Immunology, The Royal Children's Hospital Melbourne, Parkville, Victoria, Australia
- Department of Paediatrics, The University of Melbourne, Melbourne, Victoria, Australia
| | - Patrick Quinn
- Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, South Australia, Australia
- Department of Allergy and Clinical Immunology, Women's and Children's Health Network, North Adelaide, South Australia, Australia
| | - Michael O'Sullivan
- Faculty of Medicine Dentistry and Health Sciences, The University of Western Australia, Perth, Western Australia, Australia
- Immunology Department, Perth Children's Hospital, Nedlands, Western Australia, Australia
| | - Susan L Prescott
- Telethon Kids Institute, The University of Western Australia, Nedlands, Western Australia, Australia
- Immunology Department, Perth Children's Hospital, Nedlands, Western Australia, Australia
| | - Rosalie Grivell
- Department of Obstetrics Gynaecology and Reproductive Medicine, Flinders University, Bedford Park, South Australia, Australia
| | - Maria Makrides
- SAHMRI Women and Kids, South Australian Health and Medical Research Institute, Adelaide, South Australia, Australia
- Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, South Australia, Australia
| |
Collapse
|
6
|
Schocker F, Jappe U. Breastfeeding: Maternally Transferred Allergens in Breast Milk: Protective or Sensitizing? Mol Nutr Food Res 2022; 66:e2200066. [PMID: 35619210 DOI: 10.1002/mnfr.202200066] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 05/01/2022] [Indexed: 11/11/2022]
Abstract
According to a thorough literature search, the following allergen sources have been associated with allergy symptoms in the exclusively breastfed child: hen's egg, cow's milk, peanut, trout. Subsequently, several studies use the advantage of molecular allergology and investigate the potential transfer of single allergens into breastmilk. This is shown for caseins, whey proteins, gliadin, ovalbumin, ovomucoid, the peanut allergens Ara h 2 and Ara h 6, as well as the inhalant allergens Der p 1 and Blo t 5. It is still a matter of debate whether or not food allergens transferred via breastfeeding to the baby promote allergic sensitization or induce tolerance and via which mechanisms they may shift the immune response to the one or other side. Noteworthy, some breastfed children are described to be sensitized to foods before being exposed to solid foods, and this exposure may have occurred through breastmilk. In the light of these findings the investigation of food allergens transferred from the mother's diet into breastmilk and their impact on sensitization or allergy prevention remains a current topic in research. This review describes breastmilk in its composition and provides data on the identification of food allergens therein including human and mouse studies.
Collapse
Affiliation(s)
- Frauke Schocker
- Division of Clinical and Molecular Allergology, Priority Research Area Asthma and Allergy, Research Center Borstel, Leibniz Lung Center, Borstel, Germany.,Airway Research Center North (ARCN), Member of the German Center for Lung Research, Germany
| | - Uta Jappe
- Division of Clinical and Molecular Allergology, Priority Research Area Asthma and Allergy, Research Center Borstel, Leibniz Lung Center, Borstel, Germany.,Airway Research Center North (ARCN), Member of the German Center for Lung Research, Germany.,Interdisciplinary Allergy Outpatient Clinic, Department of Pneumology, University of Lübeck, Lübeck, Germany
| |
Collapse
|
7
|
Gamirova A, Berbenyuk A, Levina D, Peshko D, Simpson MR, Azad MB, Järvinen KM, Brough HA, Genuneit J, Greenhawt M, Verhasselt V, Peroni DG, Perkin MR, Warner JO, Palmer DJ, Boyle RJ, Munblit D. Food Proteins in Human Breast Milk and Probability of IgE-Mediated Allergic Reaction in Children During Breastfeeding: A Systematic Review. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY. IN PRACTICE 2022; 10:1312-1324.e8. [PMID: 35123103 DOI: 10.1016/j.jaip.2022.01.028] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 01/13/2022] [Accepted: 01/13/2022] [Indexed: 12/12/2022]
Abstract
BACKGROUND Previous reports suggested that food proteins present in human milk (HM) may trigger symptoms in allergic children during breastfeeding, but existing evidence has never been reviewed systematically. OBJECTIVE To assess the probability of food proteins in HM to trigger allergic reactions in infants with IgE-mediated food allergy. METHODS Electronic bibliographic databases (MEDLINE, EMBASE) were systematically searched from inception to November 3, 2021. The data regarding the levels of food proteins detected in HM were extracted and compared with data from the Voluntary Incidental Trace Allergen Labelling (VITAL 3.0) guide to assess the probability of food-allergic individuals to experience immediate type allergic reactions on ingesting HM. RESULTS A total of 32 studies were identified. Fourteen studies assessed excretion of cow's milk proteins into HM, 9 egg, 4 peanut, and 2 wheat; 3 measured levels of cow's milk and egg proteins simultaneously. We found that levels of all food proteins across the studies were much lower than the eliciting dose for 1% of allergic individuals (ED01) in most of the samples. The probability of an IgE-mediated allergic reaction in a food-allergic infant breastfed by a woman consuming the relevant food can be estimated as ≤1:1000 for cow's milk, egg, peanut, and wheat. CONCLUSIONS To our knowledge, this is the first systematic review that assesses and summarizes evidence on food proteins in HM and potential for IgE-mediated allergic reactions. Our data suggest that the probability of IgE-mediated allergic reactions to food proteins in HM is low.
Collapse
Affiliation(s)
- Aysylu Gamirova
- Department of Paediatrics and Paediatric Infectious Diseases, Institute of Child's Health, Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - Anna Berbenyuk
- Department of Paediatrics and Paediatric Infectious Diseases, Institute of Child's Health, Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - Daria Levina
- Department of Paediatrics and Paediatric Infectious Diseases, Institute of Child's Health, Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - Dmitrii Peshko
- Department of Paediatrics and Paediatric Infectious Diseases, Institute of Child's Health, Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - Melanie R Simpson
- Department of Public Health and Nursing, Norwegian University of Science and Technology, Trondheim, Norway; Clinic of Laboratory Medicine, St Olavs Hospital, Trondheim, Norway
| | - Meghan B Azad
- Manitoba Interdisciplinary Lactation Centre (MILC), Children's Hospital Research Institute of Manitoba, Department of Pediatrics and Child Health, University of Manitoba, Winnipeg, MB, Canada
| | - Kirsi M Järvinen
- Division of Pediatric Allergy and Immunology & Center for Food Allergy, University of Rochester School of Medicine and Dentistry, Rochester, NY
| | - Helen A Brough
- Children's Allergy Service, Evelina Children's Hospital, Guy's and St. Thomas' Hospital, London, United Kingdom; Paediatric Allergy Group, Department of Women and Children's Health, School of Life Course Sciences, King's College London, London, United Kingdom
| | - Jon Genuneit
- Pediatric Epidemiology, Department of Pediatrics, Medical Faculty, Leipzig University, Leipzig, Germany
| | - Matthew Greenhawt
- Department of Pediatrics, Section of Allergy/Immunology, Food Challenge and Research Unit, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, Colo
| | - Valerie Verhasselt
- School of Molecular Sciences, University of Western Australia, Perth, WA, Australia
| | - Diego G Peroni
- Department of Clinical and Experimental Medicine, Section of Paediatrics, University of Pisa, Pisa, Italy
| | - Michael R Perkin
- The Population Health Research Institute, St George's, University of London, London, United Kingdom
| | - John O Warner
- National Institute for Health Research, Collaboration for Leadership in Applied Health Research and Care for NW London, London, United Kingdom; Department of Paediatrics, Imperial College London, London, United Kingdom
| | - Debra J Palmer
- School of Medicine, University of Western Australia, Crawley, WA, Australia; Telethon Kids Institute, University of Western Australia, Nedlands, WA, Australia
| | - Robert J Boyle
- Inflammation, Repair and Development Section, National Heart and Lung Institute, Faculty of Medicine, Imperial College London, London, United Kingdom
| | - Daniel Munblit
- Department of Paediatrics and Paediatric Infectious Diseases, Institute of Child's Health, Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia.
| |
Collapse
|
8
|
Hazebrouck S, Canon N, Dreskin SC. The Effector Function of Allergens. FRONTIERS IN ALLERGY 2022; 3:818732. [PMID: 35386644 PMCID: PMC8974742 DOI: 10.3389/falgy.2022.818732] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 01/14/2022] [Indexed: 01/29/2023] Open
Abstract
Allergens are antigens that generate an IgE response (sensitization) in susceptible individuals. The allergenicity of an allergen can be thought of in terms of its ability to sensitize as well as its ability to cross-link IgE/IgE receptor complexes on mast cells and basophils leading to release of preformed and newly formed mediators (effector activity). The identity of the allergens responsible for sensitization may be different from those that elicit an allergic response. Effector activity is determined by (1) the amount of specific IgE (sIgE) and in some circumstances the ratio of sIgE to total IgE, (2) the number of high affinity receptors for IgE (FcεR1) on the cell surface, (3) the affinity of binding of sIgE for its epitope and, in a polyclonal response, the collective avidity, (4) the number and spatial relationships of IgE binding epitopes on the allergen and (5) the presence of IgG that can bind to allergen and either block binding of sIgE and/or activate low affinity IgG receptors that activate intracellular inhibitory pathways. This review will discuss these important immunologic and physical properties that contribute to the effector activity of allergens.
Collapse
Affiliation(s)
- Stéphane Hazebrouck
- Université Paris Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI, Gif-sur-Yvette, France
| | - Nicole Canon
- Division of Allergy and Clinical Immunology, Department of Medicine, University of Colorado Denver, Aurora, CO, United States
| | - Stephen C. Dreskin
- Division of Allergy and Clinical Immunology, Department of Medicine, University of Colorado Denver, Aurora, CO, United States
- *Correspondence: Stephen C. Dreskin
| |
Collapse
|
9
|
Dekker PM, Boeren S, van Goudoever JB, Vervoort JJM, Hettinga KA. Exploring Human Milk Dynamics: Interindividual Variation in Milk Proteome, Peptidome, and Metabolome. J Proteome Res 2022; 21:1002-1016. [PMID: 35104145 PMCID: PMC8981310 DOI: 10.1021/acs.jproteome.1c00879] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
![]()
Human milk is a dynamic
biofluid, and its detailed composition
receives increasing attention. While most studies focus on changes
over time or differences between maternal characteristics, interindividual
variation receives little attention. Nevertheless, a comprehensive
insight into this can help interpret human milk studies and help human
milk banks provide targeted milk for recipients. This study aimed
to map interindividual variation in the human milk proteome, peptidome,
and metabolome and to investigate possible explanations for this variation.
A set of 286 milk samples was collected from 29 mothers in the third
month postpartum. Samples were pooled per mother, and proteins, peptides,
and metabolites were analyzed. A substantial coefficient of variation
(>100%) was observed for 4.6% and 36.2% of the proteins and peptides,
respectively. In addition, using weighted correlation network analysis
(WGCNA), 5 protein and 11 peptide clusters were obtained, showing
distinct characteristics. With this, several associations were found
between the different data sets and with specific sample characteristics.
This study provides insight into the dynamics of human milk protein,
peptide, and metabolite composition. In addition, it will support
future studies that evaluate the effect size of a parameter of interest
by enabling a comparison with natural variability.
Collapse
Affiliation(s)
- Pieter M Dekker
- Food Quality and Design Group, Wageningen University & Research, Bornse Weilanden 9, 6708 WG Wageningen, The Netherlands.,Laboratory of Biochemistry, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - Sjef Boeren
- Laboratory of Biochemistry, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - Johannes B van Goudoever
- Department of Pediatrics, Amsterdam UMC Vrije Universiteit Emma Children's Hospital, 1081 Amsterdam, The Netherlands
| | - Jacques J M Vervoort
- Laboratory of Biochemistry, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - Kasper A Hettinga
- Food Quality and Design Group, Wageningen University & Research, Bornse Weilanden 9, 6708 WG Wageningen, The Netherlands
| |
Collapse
|
10
|
Kosmeri C, Rallis D, Kostara M, Siomou E, Tsabouri S. Characteristics of Exogenous Allergen in Breast Milk and Their Impact on Oral Tolerance Induction. Front Pediatr 2022; 10:830718. [PMID: 35311039 PMCID: PMC8931296 DOI: 10.3389/fped.2022.830718] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 01/11/2022] [Indexed: 11/13/2022] Open
Abstract
Food allergy is a common health problem in childhood since its prevalence was estimated to range from 6. 5 to 24.6% in European countries. Recently, a lot of research has focused on the impact of breastfeeding on oral tolerance induction. Since it was found that breast milk contains immunologically active food antigens, it would be very helpful to clarify the factors of antigen shedding that promotes oral tolerance. This narrative review aimed to summarize the latest evidence from experimental and human studies regarding allergen characteristics in human milk that may influence oral tolerance induction. A literature search in PubMed, MEDLINE, and Google Scholar was conducted. The diet of the mother was found to have a direct impact on allergen amount in the breastmilk, while antigens had different kinetics in human milk between women and depending on the antigen. The mode of antigen consumption, such as the cooking of an antigen, may also affect the allergenicity of the antigen in human milk. The dose of the antigen in human milk is in the range of nanograms per milliliter; however, it was found to have a tolerogenic effect. Furthermore, the presence of antigen-specific immunoglobulins, forming immune complexes with antigens, was found more tolerogenic compared to free allergens in experimental studies, and this is related to the immune status of the mother. While examining available data, this review highlights gaps in knowledge regarding allergen characteristics that may influence oral tolerance.
Collapse
Affiliation(s)
- Chrysoula Kosmeri
- Department of Pediatrics, University Hospital of Ioannina, Ioannina, Greece
| | - Dimitrios Rallis
- Neonatal Intensive Care Unit, School of Medicine, University of Ioannina, Ioannina, Greece
| | - Maria Kostara
- Department of Pediatrics, University Hospital of Ioannina, Ioannina, Greece
| | - Ekaterini Siomou
- Department of Pediatrics, University Hospital of Ioannina, Ioannina, Greece
| | - Sophia Tsabouri
- Department of Pediatrics, University Hospital of Ioannina, Ioannina, Greece
| |
Collapse
|
11
|
Shamji MH, Valenta R, Jardetzky T, Verhasselt V, Durham SR, Würtzen PA, van Neerven RJ. The role of allergen-specific IgE, IgG and IgA in allergic disease. Allergy 2021; 76:3627-3641. [PMID: 33999439 PMCID: PMC8601105 DOI: 10.1111/all.14908] [Citation(s) in RCA: 85] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 05/03/2021] [Accepted: 05/10/2021] [Indexed: 12/28/2022]
Abstract
Immunoglobulin E (IgE)‐mediated allergy is the most common hypersensitivity disease affecting more than 30% of the population. Exposure to even minute quantities of allergens can lead to the production of IgE antibodies in atopic individuals. This is termed allergic sensitization, which occurs mainly in early childhood. Allergen‐specific IgE then binds to the high (FcεRI) and low‐affinity receptors (FcεRII, also called CD23) for IgE on effector cells and antigen‐presenting cells. Subsequent and repeated allergen exposure increases allergen‐specific IgE levels and, by receptor cross‐linking, triggers immediate release of inflammatory mediators from mast cells and basophils whereas IgE‐facilitated allergen presentation perpetuates T cell–mediated allergic inflammation. Due to engagement of receptors which are highly selective for IgE, even tiny amounts of allergens can induce massive inflammation. Naturally occurring allergen‐specific IgG and IgA antibodies usually recognize different epitopes on allergens compared with IgE and do not efficiently interfere with allergen‐induced inflammation. However, IgG and IgA antibodies to these important IgE epitopes can be induced by allergen‐specific immunotherapy or by passive immunization. These will lead to competition with IgE for binding with the allergen and prevent allergic responses. Similarly, anti‐IgE treatment does the same by preventing IgE from binding to its receptor on mast cells and basophils. Here, we review the complex interplay of allergen‐specific IgE, IgG and IgA and the corresponding cell receptors in allergic diseases and its relevance for diagnosis, treatment and prevention of allergy.
Collapse
Affiliation(s)
| | - Rudolf Valenta
- Department of Pathophysiology and Allergy Research Medical University of Vienna Vienna Austria
- Laboratory of Immunopathology Department of Clinical Immunology and Allergology Sechenov First Moscow State Medical University Moscow Russia
- NRC Institute of Immunology FMBA of Russia Moscow Russia
- Karl Landsteiner University of Health Sciences Krems Austria
| | | | - Valerie Verhasselt
- School of Molecular Sciences University of Western Australia Perth WA Australia
| | | | | | - R.J. Joost van Neerven
- Wageningen University & Research Wageningen The Netherlands
- FrieslandCampina Amersfoort The Netherlands
| |
Collapse
|
12
|
Foo ACY, Mueller GA. Abundance and Stability as Common Properties of Allergens. FRONTIERS IN ALLERGY 2021; 2:769728. [PMID: 35386965 PMCID: PMC8974735 DOI: 10.3389/falgy.2021.769728] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 10/04/2021] [Indexed: 01/06/2023] Open
Abstract
There have been many attempts to identify common biophysical properties which differentiate allergens from their non-immunogenic counterparts. This review will focus on recent studies which examine two such factors: abundance and stability. Anecdotal accounts have speculated that the elevated abundance of potential allergens would increase the likelihood of human exposure and thus the probability of sensitization. Similarly, the stability of potential allergens dictates its ability to remain a viable immunogen during the transfer from the source to humans. This stability could also increase the resilience of potential allergens to both gastric and endosomal degradation, further skewing the immune system toward allergy. Statistical analyses confirm both abundance and stability as common properties of allergens, while epidemiological surveys show a correlation between exposure levels (abundance) and allergic disease. Additional studies show that changes in protein stability can predictably alter gastric/endosomal processing and immunogenicity, providing a mechanistic link between stability and allergenicity. However, notable exceptions exist to both hypotheses which highlight the multifaceted nature of immunological sensitization, and further inform our understanding of some of these other factors and their contribution to allergic disease.
Collapse
|
13
|
Trapped ion mobility spectrometry time-of-flight mass spectrometry for high throughput and high resolution characterization of human milk oligosaccharide isomers. Anal Chim Acta 2021; 1180:338878. [PMID: 34538323 DOI: 10.1016/j.aca.2021.338878] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 07/21/2021] [Accepted: 07/22/2021] [Indexed: 12/17/2022]
Abstract
The microbiome and immune system of infants are shaped by various bioactive components of human breastmilk, notably human milk oligosaccharides (HMOs). HMOs represent the third component of breastmilk and exhibit extremely high structural diversity with many isomers. Here, we propose a high throughput and high resolution approach to characterize main oligosaccharides present in breastmilk with high identification level thanks to ion mobility spectrometry. Four pairs of standard HMO isomers, that are (LNT/LNnT), (LNFP I/LNFP V), (3'-SL/6'-SL) and (2'-FL/3-FL), were first investigated under both positive and negative ionization mode using direct introduction-trapped ion mobility spectrometry-time-of-flight mass spectrometry (TIMS-TOF). By examining all the ionic species formed (i.e. protonated and deprotonated ions as well as adduct species), every isomer pair could be distinguished through the separation of at least one species, even with a small difference in collision cross section values (as small as 1.5%) thanks to the flexible resolution capacity of the TIMS instrument. Although multiple mobility peaks resulting from different glycan anomeric conformers, open-ring and/or different ionic isomer structures (i.e. various charge site locations), could be observed for some HMO species. The reduction at the reducing-end of HMOs did not significantly facilitate the isomer distinction. Finally, the unambiguous identification of the studied HMOs in a breastmilk sample showed the potential of the approach combining ion mobility separation and MS/MS experiments for high throughput distinction of HMO isomers in complex breastmilk samples without laborious sample preparation.
Collapse
|
14
|
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] [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.
Collapse
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
| |
Collapse
|
15
|
Macchiaverni P, Rekima A, van den Elsen L, Renz H, Verhasselt V. Allergen shedding in human milk: Could it be key for immune system education and allergy prevention? J Allergy Clin Immunol 2021; 148:679-688. [PMID: 34310930 DOI: 10.1016/j.jaci.2021.07.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 07/19/2021] [Accepted: 07/19/2021] [Indexed: 02/02/2023]
Abstract
In addition to being a source of nutrients for the developing newborn, human milk contains thousands of bioactive compounds, which influence infant health in the short-term as exemplified by its major benefits on infectious disease prevention. Many of the human milk compounds also have the required characteristics to instruct immune development and guide long-term health. Prebiotics, probiotics, and varied antimicrobial molecules all have the potential to shape the composition and function of the establishing gut microbiota, which is known to be a major determinant of immune function. Another and less explored way human milk can instruct long-term immunity is through antigen shedding. Here, we will review the evidence that antigens from maternal environment and more specifically from allergen sources are found in human milk. We will discuss data from rodent models and birth cohorts showing that allergen shedding in breast milk may influence long-term allergy risk. We will uncover the variables that may underlie heterogeneity in oral tolerance induction and allergy prevention in children breast-fed by allergen-exposed mothers. We will focus on the parameters that control antigen transfer to breast milk, on the unique biological characteristics of allergens in breast milk, and on the milk bioactive compounds that were found to influence immune response in offspring. We propose this understanding is fundamental to guide maternal interventions leading to lifelong allergen tolerance.
Collapse
Affiliation(s)
- Patricia Macchiaverni
- School of Medicine and Biomedical Sciences, University of Western Australia, Perth, Australia; Telethon Kids Institute, Perth, Australia
| | - Akila Rekima
- School of Medicine and Biomedical Sciences, University of Western Australia, Perth, Australia; Telethon Kids Institute, Perth, Australia
| | - Lieke van den Elsen
- School of Medicine and Biomedical Sciences, University of Western Australia, Perth, Australia; Telethon Kids Institute, Perth, Australia
| | - Harald Renz
- Institute of Laboratory Medicine, Philipps Universität Marburg, Marburg, Germany; Member of the Universities of Giessen and Marburg Lung Center (UGMLC), Marburg, Germany; German Center for Lung Research (DZL), Marburg, Germany; In Vivo Planetary Health, Worldwide Universities Network (WUN), West New York
| | - Valerie Verhasselt
- School of Medicine and Biomedical Sciences, University of Western Australia, Perth, Australia; Telethon Kids Institute, Perth, Australia; In Vivo Planetary Health, Worldwide Universities Network (WUN), West New York.
| |
Collapse
|
16
|
Abstract
Atopic dermatitis and food allergy are the most common allergic conditions affecting the infant population. Both immunoglobulin E (IgE)-mediated and non-IgE-mediated food allergy are seen in infancy. Early life feeding guidelines have changed dramatically over the past 30 years, more recently because of an improved understanding of IgE-mediated food allergy. This article focuses on identification, diagnosis, management, and prevention of food allergy in the infant population.
Collapse
Affiliation(s)
- Ashley Lynn Devonshire
- Department of Pediatrics, Division of Allergy and Immunology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Avenue, MLC 2000, Cincinnati, OH 45229, USA.
| | - Adora A Lin
- Department of Pediatrics, Division of Allergy and Immunology, Children's National Hospital, Room 5225, 111 Michigan Avenue Northwest, Washington, DC 20010, USA
| |
Collapse
|
17
|
Abstract
Human milk contains a wide range of immunomodulatory factors, including immunoglobulins, human milk oligosaccharides, cytokines, microbiome, innate factors and food antigens. Maternal diet can influence the content of human milk as it is well-established that dietary antigens can be secreted in human milk after maternal consumption, but whether these dietary antigens promote tolerance or sensitization in the infant is a subject of debate. This review summarizes the current literature on these immunologically active factors in human milk, including the microbiome, innate factors, and maternal diet-derived dietary antigens in the context of development of allergic diseases, with the focus on food allergy.
Collapse
|
18
|
Reduced peanut sensitization with maternal peanut consumption and early peanut introduction while breastfeeding. J Dev Orig Health Dis 2020; 12:811-818. [PMID: 33292902 DOI: 10.1017/s2040174420001129] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
New guidelines for peanut allergy prevention in high-risk infants recommend introducing peanut during infancy but do not address breastfeeding or maternal peanut consumption. We assessed the independent and combined association of these factors with peanut sensitization in the general population CHILD birth cohort (N = 2759 mother-child dyads). Mothers reported peanut consumption during pregnancy, timing of first infant peanut consumption, and length of breastfeeding duration. Child peanut sensitization was determined by skin prick testing at 1, 3, and 5 years. Overall, 69% of mothers regularly consumed peanuts and 36% of infants were fed peanut in the first year (20% while breastfeeding and 16% after breastfeeding cessation). Infants who were introduced to peanut early (before 1 year) after breastfeeding cessation had a 66% reduced risk of sensitization at 5 years compared to those who were not (1.9% vs. 5.8% sensitization; aOR 0.34, 95% CI 0.14-0.68). This risk was further reduced if mothers introduced peanut early while breastfeeding and regularly consumed peanut themselves (0.3% sensitization; aOR 0.07, 0.01-0.25). In longitudinal analyses, these associations were driven by a higher odds of outgrowing early sensitization and a lower odds of late-onset sensitization. There was no apparent benefit (or harm) from maternal peanut consumption without breastfeeding. Taken together, these results suggest the combination of maternal peanut consumption and breastfeeding at the time of peanut introduction during infancy may help to decrease the risk of peanut sensitization. Mechanistic and clinical intervention studies are needed to confirm and understand this "triple exposure" hypothesis.
Collapse
|
19
|
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] [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.
Collapse
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
| |
Collapse
|
20
|
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] [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.
Collapse
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
| |
Collapse
|
21
|
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] [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
| |
Collapse
|
22
|
Presentation and Management of Food Allergy in Breastfed Infants and Risks of Maternal Elimination Diets. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY-IN PRACTICE 2020; 8:52-67. [DOI: 10.1016/j.jaip.2019.11.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 11/12/2019] [Accepted: 11/12/2019] [Indexed: 12/14/2022]
|
23
|
Fujimura T, Lum SZC, Nagata Y, Kawamoto S, Oyoshi MK. Influences of Maternal Factors Over Offspring Allergies and the Application for Food Allergy. Front Immunol 2019; 10:1933. [PMID: 31507589 PMCID: PMC6716146 DOI: 10.3389/fimmu.2019.01933] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Accepted: 07/30/2019] [Indexed: 12/19/2022] Open
Abstract
The prevalence of food allergy has been steadily rising worldwide with the highest incidence noted among younger children, and increasingly recognized as a growing public concern. The first known ingestion of foods often causes allergic reaction, suggesting that sensitization of offspring with food allergens may occur during pregnancy and/or through breastfeeding. This creates a milieu that shapes the neonatal immune responses to these allergens. However, the effects of maternal allergen exposure and maternal sensitization with allergens on development of allergies in offspring remain controversial. This review discusses recent advances from human data in our understanding of how maternal factors, namely, food allergens, allergen-specific immunoglobulins, cytokines, genetics, and environmental factors transferred during pregnancy or breastfeeding influence offspring allergies and how such effects may be applicable to food allergy. Based on information obtained from mouse models of asthma and food allergy, the review also dissects the mechanisms by which maternal factors, including the impact of immune complexes, transforming growth factor-β, vitamin A, and regulatory T-cell responses, contribute to the induction of neonatal tolerance vs. development of allergic responses to maternally transferred allergens.
Collapse
Affiliation(s)
- Takashi Fujimura
- Division of Immunology, Boston Children's Hospital, Boston, MA, United States.,Hiroshima Research Center for Healthy Aging (HiHA), Graduate School of Advanced Sciences of Matter, Hiroshima University, Higashi-Hiroshima, Japan
| | | | - Yuka Nagata
- Division of Immunology, Boston Children's Hospital, Boston, MA, United States.,Division of Gastrointestinal Pathophysiology, Institute of Natural Medicine, University of Toyama, Toyama, Japan
| | - Seiji Kawamoto
- Hiroshima Research Center for Healthy Aging (HiHA), Graduate School of Advanced Sciences of Matter, Hiroshima University, Higashi-Hiroshima, Japan
| | - Michiko K Oyoshi
- Division of Immunology, Boston Children's Hospital, Boston, MA, United States.,Department of Pediatrics, Harvard Medical School, Boston, MA, United States
| |
Collapse
|
24
|
The Functional Power of the Human Milk Proteome. Nutrients 2019; 11:nu11081834. [PMID: 31398857 PMCID: PMC6723708 DOI: 10.3390/nu11081834] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 08/02/2019] [Accepted: 08/06/2019] [Indexed: 12/14/2022] Open
Abstract
Human milk is the most complete and ideal form of nutrition for the developing infant. The composition of human milk consistently changes throughout lactation to meet the changing functional needs of the infant. The human milk proteome is an essential milk component consisting of proteins, including enzymes/proteases, glycoproteins, and endogenous peptides. These compounds may contribute to the healthy development in a synergistic way by affecting growth, maturation of the immune system, from innate to adaptive immunity, and the gut. A comprehensive overview of the human milk proteome, covering all of its components, is lacking, even though numerous analyses of human milk proteins have been reported. Such data could substantially aid in our understanding of the functionality of each constituent of the proteome. This review will highlight each of the aforementioned components of human milk and emphasize the functionality of the proteome throughout lactation, including nutrient delivery and enhanced bioavailability of nutrients for growth, cognitive development, immune defense, and gut maturation.
Collapse
|
25
|
Järvinen KM, Martin H, Oyoshi MK. Immunomodulatory effects of breast milk on food allergy. Ann Allergy Asthma Immunol 2019; 123:133-143. [PMID: 31048004 DOI: 10.1016/j.anai.2019.04.022] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 04/23/2019] [Accepted: 04/23/2019] [Indexed: 02/06/2023]
Abstract
OBJECTIVE To summarize the literature on immunomodulatory effects of breast milk on sensitization and possible mechanisms of action. DATA SOURCES Animal and human studies in PubMed that assessed breastfeeding or breast milk composition in food allergy. STUDY SELECTIONS All recent studies and some older key publications focusing on this topic. RESULTS Human milk composition is highly variable among mothers, which can affect the developing infant immune system. Human milk also affects the infant gut microbiome, which is associated with food allergy. High levels of human milk immune factors (IgA, cytokines, oligosaccharides) are associated with reduced risk of food allergy in the infant; it remains uncertain whether these are directly protective or biomarkers of transferred protection. Animal studies highlight potential mechanisms of protection provided by antigens, transforming growth factor β, and immunocomplexes, yet their relevance is poorly understood in humans. The role of food antigens in human milk in initial sensitization or tolerance induction is unclear. CONCLUSION The protection against allergy development provided by human milk may be attributable to the effect on the infant gut microbiome or direct effects on immune system. Studies evaluating the effect of breastfeeding and human milk composition on food allergy are needed.
Collapse
Affiliation(s)
- Kirsi M Järvinen
- Division of Pediatric Allergy and Immunology & Center for Food Allergy, University of Rochester School of Medicine and Dentistry, Rochester, New York.
| | - Hayley Martin
- Department of Public Health Sciences, University of Rochester School of Medicine and Dentistry, Rochester, New York
| | - Michiko K Oyoshi
- Division of Immunology, Boston Children's Hospital and the Departments of Pediatrics, Harvard Medical School, Boston, Massachusetts
| |
Collapse
|
26
|
Picariello G, De Cicco M, Nocerino R, Paparo L, Mamone G, Addeo F, Berni Canani R. Excretion of Dietary Cow's Milk Derived Peptides Into Breast Milk. Front Nutr 2019; 6:25. [PMID: 30931311 PMCID: PMC6424006 DOI: 10.3389/fnut.2019.00025] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 02/20/2019] [Indexed: 12/22/2022] Open
Abstract
Nanoflow-HPLC-tandem mass spectrometry (MS/MS) was used to analyze the peptide fraction of breast milk samples collected from a single non-atopic donor on different days (10 samples) after receiving an oral load of cow's milk (by drinking 200 mL of bovine milk). In addition, breast milk was sampled from the same lactating mother over a 6-h period at five time points after drinking cow's milk. We aimed to trace the intra-individual variability and to define a time profile of the excretion of dietary peptides into breast milk. Overall, 21 peptides exclusively originating from both bovine caseins and whey proteins with no match within the human milk proteome were identified in the breast milk samples. These peptides were missing in the breast milk obtained from the mother after a prolonged milk- and dairy-free diet (three samples). The time course of cow's milk-derived β-Lg f(125–135) and β-casein f(81–92) in breast milk was determined from the MS ion intensity of the peptide signals. No intact cow's milk gene products were detected by HPLC-MS/MS analysis and Western blotting with anti-β-Lg antibody, but dot-blot analysis confirmed the occurrence of β-Lg fragments in the enriched peptide fraction of breast milk. These data suggest shifting the analytical perspective for the detection of dietary food allergens in breast milk from intact proteins to digested peptide fragments. The possible sensitization and elicitation potential or the tolerogenic properties of such low amounts of dietary peptides for the breastfed newborns remain to be explored.
Collapse
Affiliation(s)
- Gianluca Picariello
- National Research Council (CNR), Institute of Food Sciences, Avellino, Italy
| | - Maristella De Cicco
- National Research Council (CNR), Institute of Food Sciences, Avellino, Italy
| | - Rita Nocerino
- Department of Translational Medical Science, University of Naples "Federico II", Naples, Italy.,CEINGE Advanced Biotechnologies, University of Naples "Federico II", Naples, Italy
| | - Lorella Paparo
- Department of Translational Medical Science, University of Naples "Federico II", Naples, Italy.,CEINGE Advanced Biotechnologies, University of Naples "Federico II", Naples, Italy
| | - Gianfranco Mamone
- National Research Council (CNR), Institute of Food Sciences, Avellino, Italy
| | - Francesco Addeo
- Department of Agriculture, Parco Gussone, University of Naples "Federico II", Portici, Italy
| | - Roberto Berni Canani
- Department of Translational Medical Science, University of Naples "Federico II", Naples, Italy.,CEINGE Advanced Biotechnologies, University of Naples "Federico II", Naples, Italy.,European Laboratory for the Investigation of Food-Induced Diseases, University of Naples "Federico II", Naples, Italy.,Task Force on Microbiome Studies, University "Federico II", Naples, Italy
| |
Collapse
|
27
|
The influence of breastfeeding in breast-fed infants with atopic dermatitis. JOURNAL OF MICROBIOLOGY, IMMUNOLOGY, AND INFECTION = WEI MIAN YU GAN RAN ZA ZHI 2019; 52:132-140. [DOI: 10.1016/j.jmii.2017.06.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Revised: 05/09/2017] [Accepted: 06/16/2017] [Indexed: 01/22/2023]
|
28
|
Dawod B, Marshall JS. Cytokines and Soluble Receptors in Breast Milk as Enhancers of Oral Tolerance Development. Front Immunol 2019; 10:16. [PMID: 30723472 PMCID: PMC6349727 DOI: 10.3389/fimmu.2019.00016] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Accepted: 01/04/2019] [Indexed: 12/13/2022] Open
Abstract
The postpartum period is an important window during which environmental factors can shape the life-long health of the infant. This time period often coincides with substantial milk consumption either in the form of breast milk or from cow's milk sources, such as infant formulas. Although breast milk is the most beneficial source of nutrients for infants during the first 6 months after birth, its role in regulating food allergy development, through regulation of oral tolerance, is still controversial. Breast milk contains several factors that can impact mucosal immune function, including immune cells, antibodies, microbiota, oligosaccharides, cytokines, and soluble receptors. However, there is considerable variation in the assessed levels of cytokines and soluble receptors between studies and across the lactation period. Most of these cytokines and soluble receptors are absent, or only found in limited quantities, in commercial baby formulas. Differences in content of these pluripotent factors, which impact on both the mother and the neonate, could contribute to the controversy surrounding the role of breast milk regulating oral tolerance. This review highlights current knowledge about the importance of cytokines and soluble receptors in breast milk on the development of oral tolerance and tolerance-relateddisorders. Understanding the mechanisms by which such milk components might promote oral tolerance could aid in the development of improved strategies for allergy prevention.
Collapse
Affiliation(s)
- Bassel Dawod
- Department of Pathology, Dalhousie University, Halifax, NS, Canada
| | - Jean S Marshall
- Department of Pathology, Dalhousie University, Halifax, NS, Canada.,Department of Microbiology and Immunology, Dalhousie University, Halifax, NS, Canada
| |
Collapse
|
29
|
Zhu J, Garrigues L, Van den Toorn H, Stahl B, Heck AJR. Discovery and Quantification of Nonhuman Proteins in Human Milk. J Proteome Res 2019; 18:225-238. [PMID: 30489082 PMCID: PMC6326037 DOI: 10.1021/acs.jproteome.8b00550] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Indexed: 01/11/2023]
Abstract
The question whether and which nonhuman peptides or proteins are present in human milk was raised many decades ago. However, due to cross-reactivity or nonspecific antibody recognition, the accuracy of detection by immunochemical methods has been a concern. Additionally, the relative low-abundance of nonhuman peptides/proteins in the complex milk sample makes them a challenging target to detect. Here, by deep proteome profiling, we detected several nonhuman peptides, which could be grouped as nonhuman proteins. We next estimated their concentration in human milk by combining data-dependent shotgun proteomics and parallel reaction monitoring. First, we fractionated human milk at the protein level and were able to detect 1577 human proteins. Additionally, we identified 109 nonhuman peptides, of which 71 were grouped into 36 nonhuman proteins. In the next step, we targeted 37 nonhuman peptides and nine of them could be repeatedly quantified in human milk samples. Peptides/proteins originating from bovine milk products were the dominant nonhuman proteins observed, notably bovine caseins (α-S1-, α-S2-, β-, κ-caseins) and β-lactoglobulin. The method we present here can be expanded to investigate more about nonhuman peptides and proteins in human milk and give a better understanding of how human milk plays a role in allergy prevention.
Collapse
Affiliation(s)
- Jing Zhu
- Biomolecular
Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular
Research and Utrecht Institute for Pharmaceutical Sciences, University of Utrecht, Padualaan 8, 3584
CH Utrecht, The Netherlands
- Netherlands
Proteomics Center, Padualaan
8, 3584 CH Utrecht, The Netherlands
| | - Luc Garrigues
- Biomolecular
Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular
Research and Utrecht Institute for Pharmaceutical Sciences, University of Utrecht, Padualaan 8, 3584
CH Utrecht, The Netherlands
- Netherlands
Proteomics Center, Padualaan
8, 3584 CH Utrecht, The Netherlands
| | - Henk Van den Toorn
- Biomolecular
Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular
Research and Utrecht Institute for Pharmaceutical Sciences, University of Utrecht, Padualaan 8, 3584
CH Utrecht, The Netherlands
- Netherlands
Proteomics Center, Padualaan
8, 3584 CH Utrecht, The Netherlands
| | - Bernd Stahl
- Danone
Nutricia Research, 3584
CT Utrecht, The Netherlands
| | - Albert J. R. Heck
- Biomolecular
Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular
Research and Utrecht Institute for Pharmaceutical Sciences, University of Utrecht, Padualaan 8, 3584
CH Utrecht, The Netherlands
- Netherlands
Proteomics Center, Padualaan
8, 3584 CH Utrecht, The Netherlands
| |
Collapse
|
30
|
Knoop KA, Holtz LR, Newberry RD. Inherited nongenetic influences on the gut microbiome and immune system. Birth Defects Res 2018; 110:1494-1503. [PMID: 30576093 PMCID: PMC8759455 DOI: 10.1002/bdr2.1436] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Accepted: 11/16/2018] [Indexed: 12/18/2022]
Abstract
The gut microbiome and the immune system codevelop around the time of birth, well after genetic information has been passed from the parents to the offspring. Each of these "organ systems" displays plasticity. The immune system can mount highly specific adaptive responses to newly encountered antigens, and the gut microbiota is affected by changes in the environment. Despite this plasticity, there is a growing appreciation that these organ systems, once established, are remarkably stable. In health, the immune system rapidly mounts responses to infections, and once cleared, resolves inflammatory responses to return to homeostasis. However, a skewed immune system, such as seen in allergy, does not easily return to homeostasis. Allergic responses are often seen to multiple antigens. Likewise, a dysbiotic gut microbiota is seen in multiple diseases. Attempts to reset the gut microbiota as a therapy for disease have met with varied success. Therefore, how these codeveloping "organ systems" become established is a central question relevant to our overall health. Recent observations suggest that maternal factors encountered both in utero and after birth can directly or indirectly impact the development of the offspring's gut microbiome and immune system. Here, we discuss how these nongenetic maternal influences can have long-term effects on the progeny's health.
Collapse
Affiliation(s)
- Kathryn A. Knoop
- Department of Medicine, Washington University School of Medicine in Saint Louis, MO 63110
| | - Lori R. Holtz
- Department of Pediatrics, Washington University School of Medicine in Saint Louis, MO 63110
| | - Rodney D. Newberry
- Department of Medicine, Washington University School of Medicine in Saint Louis, MO 63110
| |
Collapse
|
31
|
Weidmann E, Samadi N, Klems M, Heiden D, Seppova K, Ret D, Untersmayr E. Mouse Chow Composition Influences Immune Responses and Food Allergy Development in a Mouse Model. Nutrients 2018; 10:nu10111775. [PMID: 30453476 PMCID: PMC6266012 DOI: 10.3390/nu10111775] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 11/06/2018] [Accepted: 11/07/2018] [Indexed: 12/29/2022] Open
Abstract
Our diet is known to substantially influence the immune response not only by support of mucosal barriers but also via direct impact on immune cells. Thus, it was of great interest to compare the immunological effect of two mouse chows with substantial differences regarding micro-, macronutrient, lipid and vitamin content on the food allergic response in our previously established mouse model. As the two mouse chows of interest, we used a soy containing feed with lower fatty acid (FA) amount (soy-containing feed) and compared it to a soy free mouse chow (soy-free feed) in an established protocol of oral immunizations with Ovalbumin (OVA) under gastric acid suppression. In the animals receiving soy-containing feed, OVA-specific IgE, IgG1, IgG2a antibody levels were significantly elevated and food allergy was evidenced by a drop of body temperature after oral immunizations. In contrast, mice on soy-free diet had significantly higher levels of IL-10 and were protected from food allergy development. In conclusion, soy-containing feed was auxiliary during sensitizations, while soy-free feed supported oral tolerance development and food allergy prevention.
Collapse
Affiliation(s)
- Eleonore Weidmann
- Institute of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090 Vienna, Austria.
| | - Nazanin Samadi
- Institute of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090 Vienna, Austria.
| | - Martina Klems
- Institute of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090 Vienna, Austria.
| | - Denise Heiden
- Institute of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090 Vienna, Austria.
| | - Klara Seppova
- Institute of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090 Vienna, Austria.
| | - Davide Ret
- Institute of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090 Vienna, Austria.
- Division of Macromolecular Chemistry, Institute of Applied Synthetic Chemistry, Vienna University of Technology, 1060 Vienna, Austria.
| | - Eva Untersmayr
- Institute of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090 Vienna, Austria.
| |
Collapse
|
32
|
Rajani PS, Seppo AE, Järvinen KM. Immunologically Active Components in Human Milk and Development of Atopic Disease, With Emphasis on Food Allergy, in the Pediatric Population. Front Pediatr 2018; 6:218. [PMID: 30131949 PMCID: PMC6090044 DOI: 10.3389/fped.2018.00218] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Accepted: 07/16/2018] [Indexed: 12/17/2022] Open
Abstract
Breast-feeding is currently recommended to prevent the development of allergic diseases; however, data are conflicting and mechanisms are unclear. The immunomodulatory composition of human milk is poorly characterized and varies between mothers. We and others have shown that high levels of human milk IgA and certain cytokines and human milk oligosaccharides are associated with protection against food allergy in the infant, but it is unclear whether they are responsible for or simply biomarkers of the vertical transfer of protection. Because human milk has pre- and probiotic properties, the anti-allergy protection afforded by human milk may be due to its control on the developing gut microbiome. In mice, murine milk IgA supports gut homeostasis and shapes the microbiota, which in turn diversifies the intestinal IgA repertoire that reciprocally promotes the diversity of gut microbiome; these mechanisms are poorly understood in humans. In addition, several human milk bioactives are immunostimulatory, which may in part provide protection against allergic diseases. The regulation of immunologically active components in human milk is incompletely understood, although accumulating evidence suggests that IgA and cytokines in human milk reflect maternal exposures. This review summarizes the current literature on human milk components that have been associated with protection against food allergy and related allergic disorders in early childhood and discusses the work relating to regulation of these levels in human milk and possible mechanisms of action.
Collapse
Affiliation(s)
| | | | - Kirsi M. Järvinen
- Division of Pediatric Allergy and Immunology and Center for Food Allergy, University of Rochester School of Medicine and Dentistry, Rochester, NY, United States
| |
Collapse
|
33
|
Weissler KA, Rasooly M, DiMaggio T, Bolan H, Cantave D, Martino D, Neeland MR, Tang MLK, Dang TD, Allen KJ, Frischmeyer-Guerrerio PA. Identification and analysis of peanut-specific effector T and regulatory T cells in children allergic and tolerant to peanut. J Allergy Clin Immunol 2018; 141:1699-1710.e7. [PMID: 29454004 DOI: 10.1016/j.jaci.2018.01.035] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 12/20/2017] [Accepted: 01/03/2018] [Indexed: 01/30/2023]
Abstract
BACKGROUND Peanut allergy (PA) is potentially life-threatening and generally persists for life. Recent data suggest the skin might be an important route of initial sensitization to peanut, whereas early oral exposure to peanut is protective. In mice regulatory T (Treg) cells are central to the development of food tolerance, but their contribution to the pathogenesis of food allergy in human subjects is less clear. OBJECTIVE We sought to quantify and phenotype CD4+ peanut-specific effector T (ps-Teff) cells and peanut-specific regulatory T (ps-Treg) cells in children with and without PA or PS. METHODS ps-Teff and ps-Treg cells were identified from peripheral blood of children with PA, children with PS, and nonsensitized/nonallergic (NA) school-aged children and 1-year-old infants based on upregulation of CD154 or CD137, respectively, after stimulation with peanut extract. Expression of cytokines and homing receptors was evaluated by using flow cytometry. Methylation at the forkhead box protein 3 (FOXP3) locus was measured as a marker of Treg cell stability. RESULTS Differential upregulation of CD154 and CD137 efficiently distinguished ps-Teff and ps-Treg cells. A greater percentage of ps-Teff cells from infants with PA and infants with PS expressed the skin-homing molecule cutaneous lymphocyte antigen, suggesting activation after exposure through the skin, compared with NA infants. Although ps-Teff cells in both school-aged and infant children with PA produced primarily TH2 cytokines, a TH1-skewed antipeanut response was seen only in NA school-aged children. The frequency, homing receptor expression, and stability of ps-Treg cells in infants and school-aged children were similar, regardless of allergic status. CONCLUSIONS Exposure to peanut through the skin can prime the development of TH2 ps-Teff cells, which promote sensitization to peanut, despite the presence of normal numbers of ps-Treg cells.
Collapse
Affiliation(s)
- Katherine A Weissler
- Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, Md
| | - Marjohn Rasooly
- Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, Md
| | - Tom DiMaggio
- Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, Md
| | - Hyejeong Bolan
- Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, Md
| | - Daly Cantave
- Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, Md
| | - David Martino
- Murdoch Childrens Research Institute, Royal Children's Hospital, Melbourne, Australia; Department of Pediatrics, University of Melbourne, Melbourne, Australia
| | - Melanie R Neeland
- Murdoch Childrens Research Institute, Royal Children's Hospital, Melbourne, Australia
| | - Mimi L K Tang
- Murdoch Childrens Research Institute, Royal Children's Hospital, Melbourne, Australia; Department of Pediatrics, University of Melbourne, Melbourne, Australia; Department of Allergy and Immunology, Royal Children's Hospital, Melbourne, Australia
| | - Thanh D Dang
- Murdoch Childrens Research Institute, Royal Children's Hospital, Melbourne, Australia; Department of Pediatrics, University of Melbourne, Melbourne, Australia
| | - Katrina J Allen
- Murdoch Childrens Research Institute, Royal Children's Hospital, Melbourne, Australia; Department of Pediatrics, University of Melbourne, Melbourne, Australia; Department of Allergy and Immunology, Royal Children's Hospital, Melbourne, Australia
| | | |
Collapse
|
34
|
Palmer DJ, Prescott SL, Makrides M. Reply. J Allergy Clin Immunol 2018; 141:460-461. [PMID: 29146011 DOI: 10.1016/j.jaci.2017.09.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Accepted: 09/08/2017] [Indexed: 11/30/2022]
Affiliation(s)
- Debra J Palmer
- School of Medicine, The University of Western Australia, Crawley, Australia; Telethon Kids Institute, University of Western Australia, Subiaco, Australia.
| | - Susan L Prescott
- School of Medicine, The University of Western Australia, Crawley, Australia; Telethon Kids Institute, University of Western Australia, Subiaco, Australia
| | - Maria Makrides
- Healthy Mothers, Babies and Children, South Australian Health and Medical Research Institute, Adelaide, Australia; School of Medicine, University of Adelaide, Women's and Children's Health Network, North Adelaide, Australia
| |
Collapse
|
35
|
Abstract
In this issue Ohsaki et al. explain how breastfeeding can prevent the onset of food allergies in offspring by instructing T reg formation via neonatal Fc receptor (FcRn)–mediated transfer and uptake of allergen-containing IgG immune complexes (Ig-ICs) by gut dendritic cells (DCs). In this issue Ohsaki et al. (https://doi.org/10.1084/jem.20171163) explain how breastfeeding can prevent the onset of food allergies in offspring by instructing T reg formation via neonatal Fc receptor (FcRn)–mediated transfer and uptake of allergen-containing IgG immune complexes (Ig-ICs) by gut dendritic cells (DCs).
Collapse
Affiliation(s)
- Bart N Lambrecht
- VIB Center for Inflammation Research, Ghent University, Ghent, Belgium
| |
Collapse
|
36
|
Comparative analysis of native and permethylated human milk oligosaccharides by liquid chromatography coupled to high resolution mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2017; 1071:49-57. [DOI: 10.1016/j.jchromb.2017.03.028] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Revised: 03/13/2017] [Accepted: 03/23/2017] [Indexed: 01/03/2023]
|
37
|
Ohsaki A, Venturelli N, Buccigrosso TM, Osganian SK, Lee J, Blumberg RS, Oyoshi MK. Maternal IgG immune complexes induce food allergen-specific tolerance in offspring. J Exp Med 2017; 215:91-113. [PMID: 29158374 PMCID: PMC5748859 DOI: 10.1084/jem.20171163] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 08/24/2017] [Accepted: 09/28/2017] [Indexed: 12/17/2022] Open
Abstract
The role of maternal immune responses in tolerance induction is poorly understood. To study whether maternal allergen sensitization affects offspring susceptibility to food allergy, we epicutaneously sensitized female mice with ovalbumin (OVA) followed by epicutaneous sensitization and oral challenge of their offspring with OVA. Maternal OVA sensitization prevented food anaphylaxis, OVA-specific IgE production, and intestinal mast cell expansion in offspring. This protection was mediated by neonatal crystallizable fragment receptor (FcRn)-dependent transfer of maternal IgG and OVA immune complexes (IgG-IC) via breast milk and induction of allergen-specific regulatory T (T reg) cells in offspring. Breastfeeding by OVA-sensitized mothers or maternal supplementation with IgG-IC was sufficient to induce neonatal tolerance. FcRn-dependent antigen presentation by CD11c+ dendritic cells (DCs) in offspring was required for oral tolerance. Human breast milk containing OVA-IgG-IC induced tolerance in humanized FcRn mice. Collectively, we demonstrate that interactions of maternal IgG-IC and offspring FcRn are critical for induction of T reg cell responses and control of food-specific tolerance in neonates.
Collapse
Affiliation(s)
- Asa Ohsaki
- Division of Immunology, Boston Children's Hospital, Boston, MA
| | | | | | | | - John Lee
- Division of Immunology, Boston Children's Hospital, Boston, MA.,Department of Pediatrics, Harvard Medical School, Boston, MA
| | - Richard S Blumberg
- Gastroenterology Division, Brigham and Women's Hospital, Boston, MA.,Department of Medicine, Harvard Medical School, Boston, MA.,Harvard Digestive Diseases Center, Boston, MA
| | - Michiko K Oyoshi
- Division of Immunology, Boston Children's Hospital, Boston, MA .,Department of Pediatrics, Harvard Medical School, Boston, MA
| |
Collapse
|
38
|
Sarkar P, Jana K, Sikdar SR. Overexpression of biologically safe Rorippa indica defensin enhances aphid tolerance in Brassica juncea. PLANTA 2017; 246:1029-1044. [PMID: 28770337 DOI: 10.1007/s00425-017-2750-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2017] [Accepted: 07/21/2017] [Indexed: 06/07/2023]
Abstract
Transgenic mustard plants ( Brassica juncea ) expressing non-allergenic and biologically safe RiD peptide show higher tolerance against Lipaphis erysimi. Rorippa indica defensin (RiD) has previously been reported as a novel insecticidal protein derived from a wild crucifer Rorippa indica. RiD was found to have an effective insecticidal property against mustard aphid, Lipaphis erysimi. In the present study, RiD was highly upregulated in R. indica during aphid infestation initiating a defense system mediated by jasmonic acid (JA), but not by salicylic acid (SA)/abscisic acid (ABA). RiD has also been assessed for biosafety according to the FAO/WHO guideline (allergenicity of genetically modified foods; Food And Agriculture Organisation of the United Nations, Rome, Italy, 2001) and Codex Alimentarius Guideline (Guidelines for the design and implementation of national regulatory food safety assurance programme associated with the use of veterinary drugs in food producing animals. Codex Alimentarius Commission. GL, pp 71-2009, 2009). The purified protein was used to sensitize BALB/c mice and they showed normal histopathology of lung and no elevated IgE level in their sera. As the protein was found to be biologically safe and non-allergenic, it was used to develop transgenic Brassica juncea plants with enhanced aphid tolerance, which is one of the most important oilseed crops and is mostly affected by the devastating pest-L. erysimi. The transgene integration was monitored by Southern hybridization, and the positive B. juncea lines were further analyzed by Western blot, ELISA, immunohistolocalization assays and in planta insect bioassay. Transgenic plants expressing RiD conferred a higher level of tolerance against L. erysimi. All these results demonstrated that RiD is a novel, biologically safe, effective insecticidal agent and B. juncea plants expressing RiD are important components of integrated pest management.
Collapse
Affiliation(s)
- Poulami Sarkar
- Division of Plant Biology, Centenary Campus, Bose Institute, Kolkata, 700054, India
| | - Kuladip Jana
- Department of Molecular Medicine, Centenary Campus, Bose Institute, Kolkata, 700054, India
| | - Samir Ranjan Sikdar
- Division of Plant Biology, Centenary Campus, Bose Institute, Kolkata, 700054, India.
| |
Collapse
|
39
|
Schocker F, Scharf A, Kull S, Jappe U. Detection of the Peanut Allergens Ara h 2 and Ara h 6 in Human Breast Milk: Development of 2 Sensitive and Specific Sandwich ELISA Assays. Int Arch Allergy Immunol 2017; 174:17-25. [PMID: 28950267 DOI: 10.1159/000479388] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Accepted: 07/10/2017] [Indexed: 01/15/2023] Open
Abstract
BACKGROUND Little is known about breast milk as a vehicle for tolerance development or sensitization to peanuts very early in life. Thus, well-characterized and highly sensitive detection systems for the reliable determination of peanut allergens in breast milk are mandatory. METHODS For the quantification of the marker allergens Ara h 2 and Ara h 6 in the low nanogram per milliliter range in breast milk samples of a German cohort, sensitive and highly specific sandwich ELISAs were optimized and validated. RESULTS The Ara h 2 ELISA revealed a limit of detection (LOD) of 1.3 ng Ara h 2/mL and a quantification range of 2.3-250 ng/mL, the Ara h 6 ELISA showed an LOD of 0.7 ng/mL and a working range of 1.1-14.4 ng/mL. The assays showed no relevant cross-reactivity against other potentially cross-reactive legume, seed, and tree nut extracts (<0.01%, except for Ara h 1 in the Ara h 2 ELISA <0.1%). Ara h 2 was detectable in breast milk samples from 14/40 (35%) of the participants in concentrations from 2.3 to 184 ng/mL, Ara h 6 appeared in 9/40 (22.5%) of the lactating mothers between 1.1 and 9.7 ng/mL, and 1 highly positive sample with 79 ng/mL. Both allergens appeared at the same time points, but Ara h 6 in lower concentrations than Ara h 2. CONCLUSIONS Sensitive and specific diagnostic tools for the determination of Ara h 2 and Ara h 6 in human breast milk were established. The kinetics of secreted Ara h 2 and Ara h 6 seem to be similar but with a difference in concentration. Follow-up investigations on their tolerogenic or sensitizing properties in breast milk become now accessible.
Collapse
Affiliation(s)
- Frauke Schocker
- Division of Clinical and Molecular Allergology, Research Center Borstel, Priority Research Area Asthma and Allergy, Airway Research Center North (ARCN), German Center for Lung Research (DZL), Borstel, Germany
| | | | | | | |
Collapse
|
40
|
Foong RX, Brough H. The role of environmental exposure to peanut in the development of clinical allergy to peanut. Clin Exp Allergy 2017; 47:1232-1238. [PMID: 28779526 DOI: 10.1111/cea.12992] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 07/27/2017] [Accepted: 07/27/2017] [Indexed: 01/17/2023]
Abstract
The prevalence of peanut allergy has increased over the years and still remains one of the most common causes of food-related anaphylaxis. The way in which peanut sensitization occurs has been explored, such as via maternal consumption in pregnancy, via breastmilk and through a disrupted skin barrier. It has previously been shown that environmental exposure to aeroallergens in household dust can be a risk factor for the development of allergic asthma. There is an increasing body of evidence that the combination of cutaneous sensitization via a disrupted skin barrier (ie children with eczema or with filaggrin mutations) and environmental peanut exposure influences the development of peanut allergy. This review aims to explore routes of peanut sensitization and the current evidence on how environmental exposure to peanut affects the development of peanut allergy.
Collapse
Affiliation(s)
- R X Foong
- Division of Asthma, Allergy and Lung Biology, Department of Paediatric Allergy, King's College London and Guy's and St. Thomas' Hospitals NHS Foundation Trust, London, UK.,Institute of Child Health, University College of London, London, UK
| | - H Brough
- Division of Asthma, Allergy and Lung Biology, Department of Paediatric Allergy, King's College London and Guy's and St. Thomas' Hospitals NHS Foundation Trust, London, UK
| |
Collapse
|
41
|
Reduced risk of peanut sensitization following exposure through breast-feeding and early peanut introduction. J Allergy Clin Immunol 2017; 141:620-625.e1. [PMID: 28916221 DOI: 10.1016/j.jaci.2017.06.024] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2016] [Revised: 06/16/2017] [Accepted: 06/26/2017] [Indexed: 11/23/2022]
Abstract
BACKGROUND Recent trials have shown that avoiding peanuts during infancy increases the risk of peanut allergy; however, these studies did not address maternal peanut consumption. OBJECTIVE We sought to investigate the relationship between maternal peanut consumption while breast-feeding, timing of direct peanut introduction, and peanut sensitization at age 7 years. METHODS Secondary analysis of a nested cohort within the 1995 Canadian Asthma Primary Prevention Study intervention study was performed. Breast-feeding and maternal and infant peanut consumption were captured by repeated questionnaires during infancy. Skin prick testing for peanut sensitization was performed at age 7 years. RESULTS Overall, 58.2% of mothers consumed peanuts while breast-feeding and 22.5% directly introduced peanuts to their infant by 12 months. At 7 years, 9.4% of children were sensitized to peanuts. The lowest incidence (1.7%) was observed among children whose mothers consumed peanuts while breast-feeding and directly introduced peanuts before 12 months. Incidence was significantly higher (P < .05) if mothers consumed peanuts while breast-feeding but delayed introducing peanuts to their infant beyond 12 months (15.1%), or if mothers avoided peanuts themselves but directly introduced peanuts by 12 months (17.6%). Interaction analyses controlling for study group and maternal atopy confirmed that maternal peanut consumption while breast-feeding and infant peanut consumption by 12 months were protective in combination, whereas either exposure in isolation was associated with an increased risk of sensitization (P interaction = .003). CONCLUSIONS In this secondary analysis, maternal peanut consumption while breast-feeding paired with direct introduction of peanuts in the first year of life was associated with the lowest risk of peanut sensitization, compared with all other combinations of maternal and infant peanut consumption.
Collapse
|
42
|
Prevention of allergies in childhood - where are we now? Allergol Select 2017; 1:200-213. [PMID: 30402617 PMCID: PMC6040005 DOI: 10.5414/alx01807e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Accepted: 07/27/2015] [Indexed: 11/18/2022] Open
Abstract
Allergic diseases represent an increasing health problem for children worldwide. Along with allergic airway diseases, food allergy comes to the fore and herewith closely intertwined the hypothesis that an early allergic sensitization might occur via skin barrier defect(s). The importance of the skin barrier has been documented by several studies meanwhile. Not only genetic studies screen the associations between Filaggrin loss-of-function mutations, atopic dermatitis, allergic sensitization, food allergy and even airway diseases, but also epidemiological studies cast new light on the hypothesis of the atopic march. As another focus in context of the development of an allergic phenotype, the specific microbial exposure with all its diversities has been crystallized as it shapes the immune system in (early) infancy. Studies explored both, the role of human intestinal microbiota as well as the external microbial diversity. Unfortunately suitable markers for atopic predictors are still rare. New studies point out that specific IgE antibodies (e.g., IgE to Phl p 1) in children without allergic symptoms so far, might function as a pre-clinical biomarker, which may help to identify candidates for primary (allergen non-specific) or secondary (allergen-specific) prevention in terms of specific immunoprophylaxis. These manifold research activities document a complex increase in knowledge. Nevertheless new assumptions need to be substantively confirmed in order to finally generate the urgently needed preventive strategies for allergic diseases in childhood.
Collapse
|
43
|
Abstract
The immune system of preterm infants is immature, placing them at increased risk for serious immune-related complications. Human milk provides a variety of immune protective and immune maturation factors that are beneficial to the preterm infant's poorly developed immune system. The most studied immune components in human milk include antimicrobial proteins, maternal leukocytes, immunoglobulins, cytokines and chemokines, oligosaccharides, gangliosides, nucleotides, and long-chain polyunsaturated fatty acids. There is growing evidence that these components contribute to the lower incidence of immune-related conditions in the preterm infant. Therefore, provision of these components in human milk, donor milk, or formula may provide immunologic benefits.
Collapse
|
44
|
Detection of peanut allergen in human blood after consumption of peanuts is skewed by endogenous immunoglobulins. J Immunol Methods 2016; 440:52-57. [PMID: 27845035 DOI: 10.1016/j.jim.2016.11.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Revised: 11/07/2016] [Accepted: 11/08/2016] [Indexed: 12/16/2022]
Abstract
Some studies have suggested that allergens may appear in the circulation after ingestion of allergenic food sources. The reported levels of allergen in serum, however, are low, and conclusions between studies differ. Here, we investigated factors that determine the detection of allergens in serum after consumption of peanuts. Ten healthy volunteers ingested 100g of light-roasted peanuts. Serum samples were taken at regular intervals for six hours. A double monoclonal sandwich ELISA was used to analyse the presence and quantity of the major peanut allergen Ara h 6 in serum. In 4 out of 10 subjects, no Ara h 6 could be detected. Purified Ara h 6 that was digested in vitro was still reactive in the ELISA, rejecting the possibility that digestion leads to small peptides that could not be detected. Spiking of purified Ara h 6 in baseline serum showed that the pre-ingestion serum of these four subjects partially prevented Ara h 6 to react in the ELISA, with a reduction of reactivity of up to 3 orders of magnitude or more. Pre-ingestion serum of the other six subjects did not show such an effect. The reduction of reactivity of Ara h 6 coincided with high titres of IgG and IgG4, and removal of IgG from pre-ingestion serum abolished this effect completely, indicating that IgG and IgG4 inhibited the reactivity of Ara h6 in the ELISA. We conclude that some individuals have IgG and IgG4 against food allergens in their blood, which interferes with detection of such food allergens in serum. Because this effect does not occur for each individual, the possibility of such interference should be taken into consideration when interpreting immunochemical studies on the absorption of food allergens in serum.
Collapse
|
45
|
Influence of microbiome and diet on immune responses in food allergy models. ACTA ACUST UNITED AC 2016; 17-18:71-80. [PMID: 29967644 DOI: 10.1016/j.ddmod.2016.06.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The intestinal immune system is intimately connected with the vast array of microbes present within the gut and the diversity of food components that are consumed daily. The discovery of novel molecular mechanisms, which mediate host-microbe-nutrient communication, have highlighted the important roles played by microbes and dietary factors in influencing mucosal inflammatory and allergic responses. In this review, we summarize the recent important findings in this field, which are important for food allergy and particularly relevant to animal models of food allergy.
Collapse
|
46
|
Metcalfe JR, Marsh JA, D'Vaz N, Geddes DT, Lai CT, Prescott SL, Palmer DJ. Effects of maternal dietary egg intake during early lactation on human milk ovalbumin concentration: a randomized controlled trial. Clin Exp Allergy 2016; 46:1605-1613. [PMID: 27562481 DOI: 10.1111/cea.12806] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 07/25/2016] [Accepted: 08/16/2016] [Indexed: 01/18/2023]
Abstract
BACKGROUND There is limited understanding of how maternal diet affects breastmilk food allergen concentrations, and whether exposure to allergens through this route influences the development of infant oral tolerance or sensitization. OBJECTIVE To investigate how maternal dietary egg ingestion during early lactation influences egg protein (ovalbumin) levels detected in human breastmilk. METHODS In a randomized controlled trial, women were allocated to a dietary group for the first six weeks of lactation: high-egg diet (> 4 eggs per week), low-egg diet (one-three eggs per week) or an egg-free diet. Breastmilk samples were collected at 2, 4 and 6 weeks of lactation for the measurement of ovalbumin. The permeability of the mammary epithelium was assessed by measuring the breastmilk sodium : potassium ratio. Egg-specific IgE and IgG4 were measured in infant plasma at 6 weeks, and prior to the introduction of egg in solids at 16 weeks. RESULTS Average maternal egg ingestion was associated with breastmilk ovalbumin concentration. Specifically, for each additional egg ingested per week, there was an average 25% increase in ovalbumin concentration (95% CI: 5-48%, P = 0.01). Breastmilk ovalbumin concentrations were significantly higher in the 'high-egg' group (> 4 eggs per week) compared with the 'egg-free' group (P = 0.04). However, one-third of women had no breastmilk ovalbumin detected. No detectable associations were found between mammary epithelium permeability and breastmilk ovalbumin concentrations. Infant plasma egg-specific IgG4 levels were also positively associated with maternal egg ingestion, with an average 22% (95% CI: 3-45%) increase in infant egg-specific IgG4 levels per additional egg consumed per week (P = 0.02). CONCLUSIONS AND CLINICAL RELEVANCE Increased maternal egg ingestion is associated with increased breastmilk ovalbumin, and markers of immune tolerance in infants. These results highlight the potential for maternal diet to benefit infant oral tolerance development during lactation.
Collapse
Affiliation(s)
- J R Metcalfe
- School of Paediatrics and Child Health, The University of Western Australia, Perth, WA, Australia
| | - J A Marsh
- Telethon Kids Institute, The University of Western Australia, Perth, WA, Australia.,School of Mathematics & Statistics, The University of Western Australia, Perth, WA, Australia
| | - N D'Vaz
- Telethon Kids Institute, The University of Western Australia, Perth, WA, Australia
| | - D T Geddes
- School of Chemistry and Biochemistry, The University of Western Australia, Perth, WA, Australia
| | - C T Lai
- School of Chemistry and Biochemistry, The University of Western Australia, Perth, WA, Australia
| | - S L Prescott
- School of Paediatrics and Child Health, The University of Western Australia, Perth, WA, Australia.,Telethon Kids Institute, The University of Western Australia, Perth, WA, Australia
| | - D J Palmer
- School of Paediatrics and Child Health, The University of Western Australia, Perth, WA, Australia
| |
Collapse
|
47
|
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] [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.
Collapse
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
| |
Collapse
|
48
|
Bryce PJ. Balancing Tolerance or Allergy to Food Proteins. Trends Immunol 2016; 37:659-667. [PMID: 27600681 DOI: 10.1016/j.it.2016.08.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 08/09/2016] [Accepted: 08/10/2016] [Indexed: 01/22/2023]
Abstract
Dietary proteins usually induce immune tolerance, but may trigger life-threatening immune responses in the case of food allergy. The associated type 2 immunity, linked with specific IgE production and the activation of mast cells and basophils, is well understood but the mechanisms related to preventing food allergy are still being deciphered. Recent insights into the mechanisms that regulate oral tolerance and dietary antigen sampling have revealed unique regulatory events that occur during early life and into adulthood. Drawing from both recent clinical and experimental discoveries, this article focuses on current evidence for how several key stages of life present mechanistic points that might participate in tipping the balance between food protein tolerance and allergy.
Collapse
Affiliation(s)
- Paul J Bryce
- Division of Allergy-Immunology, Department of Medicine, Northwestern Feinberg School of Medicine, 240 East Huron, Chicago, IL 60611, USA.
| |
Collapse
|
49
|
Palmer DJ. Timing of Introduction of Solids and Early-Onset Allergic Disease. CURRENT PEDIATRICS REPORTS 2016. [DOI: 10.1007/s40124-016-0106-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
50
|
Neeland MR, Martino DJ, Allen KJ. The role of gene-environment interactions in the development of food allergy. Expert Rev Gastroenterol Hepatol 2016; 9:1371-8. [PMID: 26357960 DOI: 10.1586/17474124.2015.1084873] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The rates of IgE-mediated food allergy have increased globally, particularly in developed countries. The rising incidence is occurring more rapidly than changes to the genome sequence would allow, suggesting that environmental exposures that alter the immune response play an important role. Genetic factors may also be used to predict an increased predisposition to these environmental risk factors, giving rise to the concept of gene-environment interactions, whereby differential risk of environmental exposures is mediated through the genome. Increasing evidence also suggests a role for epigenetic mechanisms, which are sensitive to environmental exposures, in the development of food allergy. This paper discusses the current state of knowledge regarding the environmental and genetic risk factors for food allergy and how environmental exposures may interact with immune genes to modify disease risk or outcome.
Collapse
Affiliation(s)
- Melanie R Neeland
- a 1 Centre of Food and Allergy Research, Murdoch Childrens Research Institute, The Royal Children's Hospital, 50 Flemington Road, Parkville 3052, Victoria, Australia
| | - David J Martino
- a 1 Centre of Food and Allergy Research, Murdoch Childrens Research Institute, The Royal Children's Hospital, 50 Flemington Road, Parkville 3052, Victoria, Australia.,b 2 Department of Paediatrics, The University of Melbourne, Melbourne, Australia
| | | |
Collapse
|