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Ranftler C, Zehentner M, Pengl A, Röhrich A, Tschegg C, Nagl D. Purified Clinoptilolite-Tuff as an Efficient Sorbent for Food-Derived Peanut Allergens. Int J Mol Sci 2024; 25:6510. [PMID: 38928222 PMCID: PMC11203878 DOI: 10.3390/ijms25126510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Revised: 05/29/2024] [Accepted: 05/30/2024] [Indexed: 06/28/2024] Open
Abstract
The avoidance of allergen intake is crucial for persons affected by peanut allergy; however, the cross-contamination of food is common and leads to unpredictable consequences after the consumption of supposedly "safe" food. The aim of the present study was to eliminate harmful traces of peanut allergens from food using purified clinoptilolite-tuff (PCT)-a specially processed zeolite material. Analyses were performed using a peanut ELISA and a Coomassie blue (Bradford) assay. Mimicking conditions of the human gastrointestinal tract demonstrated a higher efficacy of PCT in the intestine (pH 6.8) than in the stomach (pH 1.5). Adsorption rates were fast (<2 min) and indicated high capacities (23 µg and 40 µg per 1 mg of PCT at pH 1.5 and pH 6.8, respectively). Allergenically relevant peanut protein concentrations were sorbed in artificial fluids (32 µg/mL by 4 mg/mL of PCT at pH 1.5 and 80.8 µg/mL by 0.25 mg/mL of PCT at pH 6.8) when imitating a daily dose of 2 g of PCT in an average stomach volume of 500 mL. Experiments focusing on the bioavailability of peanut protein attached to PCT revealed sustained sorption at pH 1.5 and only minor desorption at pH 6.8. Accompanied by gluten, peanut proteins showed competing binding characteristics with PCT. This study therefore demonstrates the potential of PCT in binding relevant quantities of peanut allergens during the digestion of peanut-contaminated food.
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Affiliation(s)
| | | | | | | | | | - Dietmar Nagl
- GLOCK Health, Science and Research GmbH, Hausfeldstrasse 17, 2232 Deutsch-Wagram, Austria; (C.R.); (M.Z.); (A.P.); (A.R.); (C.T.)
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2
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Lee CC, Suttikhana I, Ashaolu TJ. Techno-Functions and Safety Concerns of Plant-Based Peptides in Food Matrices. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:12398-12414. [PMID: 38797944 DOI: 10.1021/acs.jafc.4c02464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
Plant-based peptides (PBPs) benefit functional food development and environmental sustainability. Proteolysis remains the primary method of peptide production because it is a mild and nontoxic technique. However, potential safety concerns still emanate from toxic or allergenic sequences, amino acid racemization, iso-peptide bond formation, Maillard reaction, dose usage, and frequency. The main aim of this review is to investigate the techno-functions of PBPs in food matrices, as well as their safety concerns. The distinctive characteristics of PBPs exhibit their techno-functions for improving food quality and functionality by contributing to several crucial food formulations and processing. The techno-functions of PBPs include solubility, hydrophobicity, bitterness, foaming, oil-binding, and water-holding capacities, which subsequently affect food matrices. The safety and quality of foodstuff containing PBPs depend on the proper source of plant proteins, the selection of processing approaches, and compliance with legal regulations for allergen labeling and safety evaluations. The safety concerns in allergenicity and toxicity were discussed. The conclusion is that food technologists must apply safe limits and consider potential allergenic components generated during the development of food products with PBPs. Therefore, functional food products containing PBPs can be a promising strategy to provide consumers with wholesome health benefits.
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Affiliation(s)
- Chi-Ching Lee
- Department of Food Engineering, Faculty of Engineering and Natural Sciences, Istanbul Sabahattin Zaim University, Halkalı Avenue No: 28, Halkalı, Küçükçekmece, Istanbul 34303, Türkiye
| | - Itthanan Suttikhana
- Department of Multifunctional Agriculture, Faculty of Agriculture and Technology, University of South Bohemia in České Budějovice, České Budějovice, Branišovská 1645/31a, 370 05 České Budějovice 2, Czechia
| | - Tolulope Joshua Ashaolu
- Institute for Global Health Innovations, Duy Tan University, Da Nang 550000, Viet Nam
- Faculty of Medicine, Duy Tan University, Da Nang 550000, Viet Nam
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3
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Tang J, Boeren S, Wichers HJ, Hettinga KA. Differential effects of heating modes on the immunogenic potential of soy-derived peptides released after in vitro infant digestion. Food Res Int 2024; 186:114348. [PMID: 38729721 DOI: 10.1016/j.foodres.2024.114348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 03/25/2024] [Accepted: 04/17/2024] [Indexed: 05/12/2024]
Abstract
During production of soy-based infant formula, soy protein undergoes heating processes. This study investigated the differential impact of heating modes on the immunogenic potential of peptides in soy protein digests. Wet or dry heating was applied, followed by in vitro gastrointestinal infant digestion. The released peptides were analyzed by LC-MS/MS. Bioinformatics tools were utilized to predict and identify potential linear B-cell and T-cell epitopes, as well as to explore cross-reactivity with other legumes. Subsequently, the peptide intensities of the same potential epitope across different experimental conditions were compared. As a result, we confirmed the previously observed enhancing effect of wet heating on infant digestion and inhibitory effect of dry heating. A total of 8,546 peptides were detected in the digests, and 6,684 peptides were with a score over 80. Among them, 29 potential T-cell epitopes and 27 potential B-cell epitopes were predicted. Cross-reactivity between soy and other legumes, including peanut, pea, chickpea, lentil, kidney bean, and lupine, was also detected. Overall, heating and digestion time could modulate the potential to trigger peptide-induced immune responses.
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Affiliation(s)
- Jiaying Tang
- Food Quality & Design Group, Wageningen University & Research, Wageningen, The Netherlands
| | - Sjef Boeren
- Laboratory of Biochemistry, Wageningen University & Research, Wageningen, The Netherlands
| | - Harry J Wichers
- Wageningen Food & Biobased Research, Wageningen University & Research, Wageningen, The Netherlands; Laboratory of Food Chemistry, Wageningen University and Research, Wageningen, The Netherlands
| | - Kasper A Hettinga
- Food Quality & Design Group, Wageningen University & Research, Wageningen, The Netherlands.
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4
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Martineau-Côté D, Achouri A, Pitre M, Karboune S, L'Hocine L. Improved in vitro gastrointestinal digestion protocol mimicking brush border digestion for the determination of the Digestible Indispensable Amino Acid Score (DIAAS) of different food matrices. Food Res Int 2024; 178:113932. [PMID: 38309864 DOI: 10.1016/j.foodres.2024.113932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 12/24/2023] [Accepted: 01/02/2024] [Indexed: 02/05/2024]
Abstract
The Digestible Indispensable Amino Acid Score (DIAAS) is the new gold standard method for the assessment of protein nutritional quality. The DIAAS is evaluated with in vivo models, that are complex, constraining and costly. There is still no established method to assess it in vitro. In this study, we proposed to add a jejunal-ileal digestion phase to the standardized in vitro gastrointestinal digestion protocol developed by the International Network of Excellence on the Fate of Food in the Gastrointestinal Tract (INFOGEST protocol) to mimic brush border digestion and to enable DIAAS assessment in vitro in a more physiologically relevant manner. This jejunal-ileal digestion phase was performed with a porcine intestinal aminopeptidase as an alternative to brush border membrane extract, which is more difficult to obtain in a standardized way. This modified INFOGEST protocol was applied to various food matrices (faba bean, pea and soy flours, whey protein isolate and caseins) and the results were compared to published in vivo data to assess the model's physiological relevance. The addition of the jejunal-ileal digestion phase lead to a significant (p < 0.05) increase of 31 and 29 % in free and total amino acid digestibility, respectively, and of 83 % on average for the in vitro DIAAS values for all food matrices. Although the in vitro DIAAS remained underestimated compared to the in vivo ones, a strong correlation between them was observed (r = 0.879, p = 0.009), stating the relevance of this last digestion phase. This improved digestion protocol is proposed as a suitable alternative to evaluate the DIAAS in vitro when in vivo assays are not applicable.
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Affiliation(s)
- Delphine Martineau-Côté
- Agriculture and Agri-Food Canada, Saint-Hyacinthe Research and Development Centre, Saint-Hyacinthe, QC J2S 8E3, Canada; Department of Food Science and Agricultural Chemistry, Macdonald Campus, McGill University, Sainte-Anne-de-Bellevue, QC H9X 3V9, Canada.
| | - Allaoua Achouri
- Agriculture and Agri-Food Canada, Saint-Hyacinthe Research and Development Centre, Saint-Hyacinthe, QC J2S 8E3, Canada.
| | - Mélanie Pitre
- Agriculture and Agri-Food Canada, Saint-Hyacinthe Research and Development Centre, Saint-Hyacinthe, QC J2S 8E3, Canada.
| | - Salwa Karboune
- Department of Food Science and Agricultural Chemistry, Macdonald Campus, McGill University, Sainte-Anne-de-Bellevue, QC H9X 3V9, Canada.
| | - Lamia L'Hocine
- Agriculture and Agri-Food Canada, Saint-Hyacinthe Research and Development Centre, Saint-Hyacinthe, QC J2S 8E3, Canada.
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5
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Liu WL, Wang H, Hu YM, Wang XM, Chen HQ, Tu ZC. Mechanism of the Allergenicity Reduction of Ovalbumin by Microwave Pretreatment-Assisted Enzymolysis through Biological Mass Spectrometry. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:15363-15374. [PMID: 37797215 DOI: 10.1021/acs.jafc.3c04613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/07/2023]
Abstract
Ovalbumin (OVA) is a major allergen in hen eggs. Enzymolysis has been demonstrated as an efficient method for reducing OVA allergenicity. This study demonstrates that microwave pretreatment (MP) at 400 W for 20 s assisting bromelain enzymolysis further decreases the allergenicity of OVA, which was attributed to the increase in the degree of hydrolysis and promoted the destruction of IgE-binding epitopes. The results showed that MP could promote OVA unfolding, expose hydrophobic domains, and disrupt tightly packed α-helical structures and disulfide bonds, which increased the degree of hydrolysis by 7.28% and the contents of peptides below 1 kDa from 43.55 to 85.06% in hydrolysates compared with that for untreated OVA. Biological mass spectrometry demonstrated that the number of intact IgE-binding epitope peptides in MP-assisted OVA hydrolysates decreased by 533 compared to that in hydrolysis without MP; consequently, their IgG/IgE binding rates decreased more significantly. Therefore, MP-assisted enzymolysis may provide an alternative method for decreasing the OVA allergenicity.
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Affiliation(s)
- Wen Li Liu
- State Key Laboratory of Food Science and Resources, Nanchang University, 235 Nanjing East Road, Nanchang, Jiangxi 330047, China
| | - Hui Wang
- State Key Laboratory of Food Science and Resources, Nanchang University, 235 Nanjing East Road, Nanchang, Jiangxi 330047, China
| | - Yue Ming Hu
- State Key Laboratory of Food Science and Resources, Nanchang University, 235 Nanjing East Road, Nanchang, Jiangxi 330047, China
| | - Xu Mei Wang
- National R&D Center of Freshwater Fish Processing and Engineering Research Center of Freshwater Fish High-value Utilization of Jiangxi Province, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
- College of Health, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
| | - Hai Qi Chen
- State Key Laboratory of Food Science and Resources, Nanchang University, 235 Nanjing East Road, Nanchang, Jiangxi 330047, China
| | - Zong Cai Tu
- State Key Laboratory of Food Science and Resources, Nanchang University, 235 Nanjing East Road, Nanchang, Jiangxi 330047, China
- National R&D Center of Freshwater Fish Processing and Engineering Research Center of Freshwater Fish High-value Utilization of Jiangxi Province, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
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6
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Prodić I, Krstić Ristivojević M, Smiljanić K. Antioxidant Properties of Protein-Rich Plant Foods in Gastrointestinal Digestion—Peanuts as Our Antioxidant Friend or Foe in Allergies. Antioxidants (Basel) 2023; 12:antiox12040886. [PMID: 37107261 PMCID: PMC10135473 DOI: 10.3390/antiox12040886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 03/30/2023] [Accepted: 04/01/2023] [Indexed: 04/08/2023] Open
Abstract
Thermally processed peanuts are ideal plant models for studying the relationship between allergenicity and antioxidant capacity of protein-rich foods, besides lipids, carbohydrates and phytochemicals. Peanut is highly praised in the human diet; however, it is rich in allergens (>75% of total proteins). One-third of peanut allergens belong to the products of genes responsible for the defence of plants against stress conditions. The proximate composition of major peanut macromolecules and polyphenols is reviewed, focusing on the identity and relative abundance of all peanut proteins derived from recent proteomic studies. The importance of thermal processing, gastrointestinal digestion (performed by INFOGEST protocol) and their influence on allergenicity and antioxidant properties of protein-rich plant food matrices is elaborated. Antioxidant properties of bioactive peptides from nuts were also considered. Moreover, there are no studies dealing simultaneously with the antioxidant and allergenic properties of protein- and polyphenol-rich foods, considering all the molecules that can significantly contribute to the antioxidant capacity during and after gastrointestinal digestion. In summary, proteins and carbohydrates are underappreciated sources of antioxidant power released during the gastrointestinal digestion of protein-rich plant foods, and it is crucial to decipher their antioxidant contribution in addition to polyphenols and vitamins before and after gastrointestinal digestion.
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Affiliation(s)
- Ivana Prodić
- Innovative Centre of the Faculty of Chemistry in Belgrade Ltd., University of Belgrade, Studentski Trg 12–16, 11158 Belgrade, Serbia
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Vojvode Stepe 444a, 11042 Belgrade, Serbia
| | - Maja Krstić Ristivojević
- Centre of Excellence for Molecular Food Sciences, Department of Biochemistry, Faculty of Chemistry, University of Belgrade, Studentski Trg 12–16, 11158 Belgrade, Serbia
| | - Katarina Smiljanić
- Centre of Excellence for Molecular Food Sciences, Department of Biochemistry, Faculty of Chemistry, University of Belgrade, Studentski Trg 12–16, 11158 Belgrade, Serbia
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7
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Mamone G, Di Stasio L, Vitale S, Picascia S, Gianfrani C. Analytical and functional approaches to assess the immunogenicity of gluten proteins. Front Nutr 2023; 9:1049623. [PMID: 36741992 PMCID: PMC9890883 DOI: 10.3389/fnut.2022.1049623] [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: 09/20/2022] [Accepted: 12/15/2022] [Indexed: 01/19/2023] Open
Abstract
Gluten proteins are the causative agents of celiac disease (CD), a lifelong and worldwide spread food intolerance, characterized by an autoimmune enteropathy. Gluten is a complex mixture of high homologous water-insoluble proteins, characterized by a high content of glutamine and proline amino acids that confers a marked resistance to degradation by gastrointestinal proteases. As a consequence of that, large peptides are released in the gut lumen with the potential to activate inflammatory T cells, in CD predisposed individuals. To date, several strategies aimed to detoxify gluten proteins or to develop immunomodulatory drugs to recover immune tolerance to gluten are under investigation. This review overviews the state of art of both analytical and functional methods currently used to assess the immunogenicity potential of gluten proteins from different cereal sources, including native raw seed flours and complex food products, as well as drug-treated samples. The analytical design to assess the content and profile of gluten immunogenic peptides, described herein, is based on the oral-gastro-intestinal digestion (INFOGEST model) followed by extensive characterization of residual gluten peptides by proteomic and immunochemical analyses. These approaches include liquid chromatography-high-resolution mass spectrometry (LC-MS/MS) and R5/G12 competitive ELISA. Functional studies to assess the immune stimulatory capabilities of digested gluten peptides are based on gut mucosa T cells or peripheral blood cells obtained from CD volunteers after a short oral gluten challenge.
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Affiliation(s)
- Gianfranco Mamone
- Institute of Food Science, Department of Biology, Agriculture and Food Sciences, National Research Council of Italy, Avellino, Italy
| | - Luigia Di Stasio
- Institute of Food Science, Department of Biology, Agriculture and Food Sciences, National Research Council of Italy, Avellino, Italy
| | - Serena Vitale
- Institute of Biochemistry and Cell Biology, Department of Biomedical Sciences, National Research Council of Italy, Naples, Italy
| | - Stefania Picascia
- Institute of Biochemistry and Cell Biology, Department of Biomedical Sciences, National Research Council of Italy, Naples, Italy
| | - Carmen Gianfrani
- Institute of Biochemistry and Cell Biology, Department of Biomedical Sciences, National Research Council of Italy, Naples, Italy,*Correspondence: Carmen Gianfrani,
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8
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Sun N, Liu Y, Liu K, Wang S, Liu Q, Lin S. Gastrointestinal fate of food allergens and its relationship with allergenicity. Compr Rev Food Sci Food Saf 2022; 21:3376-3404. [PMID: 35751399 DOI: 10.1111/1541-4337.12989] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 03/29/2022] [Accepted: 05/09/2022] [Indexed: 01/15/2023]
Abstract
Food allergens are closely related to their gastrointestinal digestion fate, but the changes in food allergens during digestion and related mechanisms are quite complicated. This review presents in detail digestion models for predicting allergenicity, the fates of food allergens in oral, gastric and duodenal digestion, and the applications of digestomics in mapping IgE-binding epitopes of digestion-resistant peptides. Moreover, this review highlights the structure-activity relationships of food allergens during gastrointestinal digestion. Digestion-labile allergens may share common structural characteristics, such as high flexibility, rendering them easier to be hydrolyzed into small fragments with decreased or eliminated allergenicity. In contrast, the presence of disulfide bonds, tightly wound α-helical structures, or hydrophobic domains in food allergens helps them resist gastrointestinal digestion, stabilizing IgE-binding epitopes, thus maintaining their sensitization. In rare cases, digestion leads to increased allergenicity due to exposure of new epitopes. Finally, the action of the food matrix and processing on the digestion and allergenicity of food allergens as well as the underlying mechanisms was overviewed. The food matrix can directly act on the allergen by forming complexes or new epitopes to affect its gastrointestinal digestibility and thereby alter its allergenicity or indirectly affect the allergenicity by competing for enzymatic cleavage or influencing gastrointestinal pH and microbial flora. Several processing techniques attenuate the allergenicity of food proteins by altering their conformation to improve susceptibility to degradation by digestive enzymes. Given the complexity of food components, the food itself rather than a single allergen should be used to obtain more accurate data for allergenicity assessment. PRACTICAL APPLICATION: The review article will help to understand the relationship between food protein digestion and allergenicity, and may provide fundamental information for evaluating and reducing the allergenicity of food proteins.
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Affiliation(s)
- Na Sun
- School of Food Science and Technology, National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian, P. R. China.,Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian, P. R. China
| | - Yao Liu
- School of Food Science and Technology, National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian, P. R. China
| | - Kexin Liu
- School of Food Science and Technology, National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian, P. R. China
| | - Shan Wang
- School of Food Science and Technology, National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian, P. R. China
| | - Qiaozhen Liu
- School of Food Science and Technology, National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian, P. R. China.,Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian, P. R. China
| | - Songyi Lin
- School of Food Science and Technology, National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian, P. R. China.,Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian, P. R. China
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9
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Duffuler P, Bhullar KS, de Campos Zani SC, Wu J. Bioactive Peptides: From Basic Research to Clinical Trials and Commercialization. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:3585-3595. [PMID: 35302369 DOI: 10.1021/acs.jafc.1c06289] [Citation(s) in RCA: 35] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Chronic diseases, including metabolic diseases, have become a worldwide public health issue. Research regarding the use of bioactive peptides or protein hydrolysates derived from food, as the diet-based strategies for the prevention and mitigation of chronic diseases, has increased exponentially in the past decades. Numerous in vitro and in vivo studies report the efficacy and safety of food-derived bioactive peptides and protein hydrolysates as antihypertensive, anti-inflammatory, antidiabetic, and antioxidant agents. However, despite promising preclinical results, an inadequate understanding of their mechanisms of action and pharmacokinetics restrict their clinical translation. Commercialization of bioactive peptides can be further hindered due to scarce information regarding their efficacy, safety, bitter taste, as well as the lack of a cost-effective method of production. This review provides an overview of the current clinical evidence and challenges to commercial applications of food-derived bioactive peptides and protein hydrolysates for the prevention and alleviation of chronic diseases.
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Affiliation(s)
- Pauline Duffuler
- Department of Agricultural Food & Nutritional Science, University of Alberta, Edmonton, Alberta T6G 2P5, Canada
| | - Khushwant S Bhullar
- Department of Agricultural Food & Nutritional Science, University of Alberta, Edmonton, Alberta T6G 2P5, Canada
- Department of Pharmacology, University of Alberta, Edmonton, Alberta T6G 2P5, Canada
| | | | - Jianping Wu
- Department of Agricultural Food & Nutritional Science, University of Alberta, Edmonton, Alberta T6G 2P5, Canada
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10
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Yang H, Qu Y, Gao Y, Sun S, Ding R, Cang W, Wu R, Wu J. Role of the dietary components in food allergy: A comprehensive review. Food Chem 2022; 386:132762. [PMID: 35334324 DOI: 10.1016/j.foodchem.2022.132762] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 03/16/2022] [Accepted: 03/19/2022] [Indexed: 12/18/2022]
Abstract
Currently, the increasing incidence of food allergy is considered a major public health and food safety concern. Importantly, food-induced anaphylaxis is an acute, life-threatening, systemic reaction with varied clinical presentations and severity that results from the release of mediators from mast cells and basophils. Many factors are blamed for the increasing incidence of food allergy, including hygiene, microbiota (composition and diversity), inopportune complementary foods (a high-fat diet), and increasing processed food consumption. Studies have shown that different food components, including lipids, sugars, polyphenols, and vitamins, can modify the immunostimulating properties of allergenic proteins and change their bioavailability. Understanding the role of the food components in allergy might improve diagnosis, treatment, and prevention of food allergy. This review considers the role of the dietary components, including lipids, sugars, polyphenols, and vitamins, in the development of food allergy as well as results of mechanistic investigations in in vivo and in vitro models.
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Affiliation(s)
- Hui Yang
- College of Food Science, Shenyang Agricultural University, Engineering Research Center of Food Fermentation Technology, Liaoning, Key Laboratory of Microbial Fermentation Technology Innovation, Shenyang, Shenyang 110866, China
| | - Yezhi Qu
- College of Food Science, Shenyang Agricultural University, Engineering Research Center of Food Fermentation Technology, Liaoning, Key Laboratory of Microbial Fermentation Technology Innovation, Shenyang, Shenyang 110866, China
| | - Yaran Gao
- College of Food Science, Shenyang Agricultural University, Engineering Research Center of Food Fermentation Technology, Liaoning, Key Laboratory of Microbial Fermentation Technology Innovation, Shenyang, Shenyang 110866, China
| | - Shuyuan Sun
- College of Food Science, Shenyang Agricultural University, Engineering Research Center of Food Fermentation Technology, Liaoning, Key Laboratory of Microbial Fermentation Technology Innovation, Shenyang, Shenyang 110866, China
| | - Ruixue Ding
- College of Food Science, Shenyang Agricultural University, Engineering Research Center of Food Fermentation Technology, Liaoning, Key Laboratory of Microbial Fermentation Technology Innovation, Shenyang, Shenyang 110866, China
| | - Weihe Cang
- College of Food Science, Shenyang Agricultural University, Engineering Research Center of Food Fermentation Technology, Liaoning, Key Laboratory of Microbial Fermentation Technology Innovation, Shenyang, Shenyang 110866, China
| | - Rina Wu
- College of Food Science, Shenyang Agricultural University, Engineering Research Center of Food Fermentation Technology, Liaoning, Key Laboratory of Microbial Fermentation Technology Innovation, Shenyang, Shenyang 110866, China.
| | - Junrui Wu
- College of Food Science, Shenyang Agricultural University, Engineering Research Center of Food Fermentation Technology, Liaoning, Key Laboratory of Microbial Fermentation Technology Innovation, Shenyang, Shenyang 110866, China.
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11
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Patil PJ, Usman M, Zhang C, Mehmood A, Zhou M, Teng C, Li X. An updated review on food-derived bioactive peptides: Focus on the regulatory requirements, safety, and bioavailability. Compr Rev Food Sci Food Saf 2022; 21:1732-1776. [PMID: 35142435 DOI: 10.1111/1541-4337.12911] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 12/07/2021] [Accepted: 12/22/2021] [Indexed: 02/06/2023]
Abstract
Food-derived bioactive peptides (BAPs) are recently utilized as functional food raw materials owing to their potential health benefits. Although there is a huge amount of scientific research about BAPs' identification, purification, characterization, and physiological functions, and subsequently, many BAPs have been marketed, there is a paucity of review on the regulatory requirements, bioavailability, and safety of BAPs. Thus, this review focuses on the toxic peptides that could arise from their primary proteins throughout protein extraction, protein pretreatment, and BAPs' formulation. Also, the influences of BAPs' length and administration dosage on safety are summarized. Lastly, the challenges and possibilities in BAPs' bioavailability and regulatory requirements in different countries were also presented. Results revealed that the human studies of BAPs are essential for approvals as healthy food and to prevent the consumers from misinformation and false promises. The BAPs that escape the gastrointestinal tract epithelium and move to the stomach are considered good peptides and get circulated into the blood using different pathways. In addition, the hydrophobicity, net charge, molecular size, length, amino acids composition/sequences, and structural characteristics of BAPs are critical for bioavailability, and appropriate food-grade carriers can enhance it. The abovementioned features are also vital to optimize the solubility, water holding capacity, emulsifying ability, and foaming property of BAPs in food products. In the case of safety, the possible allergenic and toxic peptides often exhibit physiological functions and could be produced during the hydrolysis of food proteins. It was also noted that the production of iso-peptides bonds and undesirable Maillard reaction might occur during protein extraction, sample pretreatments, and peptide synthesis.
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Affiliation(s)
- Prasanna J Patil
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing, China.,School of Food and Health, Beijing Technology and Business University, Beijing, China
| | - Muhammad Usman
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing, China.,School of Food and Health, Beijing Technology and Business University, Beijing, China
| | - Chengnan Zhang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing, China.,School of Food and Health, Beijing Technology and Business University, Beijing, China
| | - Arshad Mehmood
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing, China.,School of Food and Health, Beijing Technology and Business University, Beijing, China
| | - Mingchun Zhou
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing, China.,School of Food and Health, Beijing Technology and Business University, Beijing, China
| | - Chao Teng
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing, China.,School of Food and Health, Beijing Technology and Business University, Beijing, China.,Beijing Engineering and Technology Research Center of Food Additives, School of Food and Chemical Technology, Beijing Technology and Business University, Beijing, China
| | - Xiuting Li
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing, China.,School of Food and Health, Beijing Technology and Business University, Beijing, China.,Beijing Engineering and Technology Research Center of Food Additives, School of Food and Chemical Technology, Beijing Technology and Business University, Beijing, China
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12
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Mullins E, Bresson J, Dalmay T, Dewhurst IC, Epstein MM, George Firbank L, Guerche P, Hejatko J, Naegeli H, Nogué F, Rostoks N, Sánchez Serrano JJ, Savoini G, Veromann E, Veronesi F, Fernandez Dumont A, Moreno FJ. Scientific Opinion on development needs for the allergenicity and protein safety assessment of food and feed products derived from biotechnology. EFSA J 2022; 20:e07044. [PMID: 35106091 PMCID: PMC8787593 DOI: 10.2903/j.efsa.2022.7044] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
This Scientific Opinion addresses the formulation of specific development needs, including research requirements for allergenicity assessment and protein safety, in general, which is urgently needed in a world that demands more sustainable food systems. Current allergenicity risk assessment strategies are based on the principles and guidelines of the Codex Alimentarius for the safety assessment of foods derived from 'modern' biotechnology initially published in 2003. The core approach for the safety assessment is based on a 'weight-of-evidence' approach because no single piece of information or experimental method provides sufficient evidence to predict allergenicity. Although the Codex Alimentarius and EFSA guidance documents successfully addressed allergenicity assessments of single/stacked event GM applications, experience gained and new developments in the field call for a modernisation of some key elements of the risk assessment. These should include the consideration of clinical relevance, route of exposure and potential threshold values of food allergens, the update of in silico tools used with more targeted databases and better integration and standardisation of test materials and in vitro/in vivo protocols. Furthermore, more complex future products will likely challenge the overall practical implementation of current guidelines, which were mainly targeted to assess a few newly expressed proteins. Therefore, it is timely to review and clarify the main purpose of the allergenicity risk assessment and the vital role it plays in protecting consumers' health. A roadmap to (re)define the allergenicity safety objectives and risk assessment needs will be required to inform a series of key questions for risk assessors and risk managers such as 'what is the purpose of the allergenicity risk assessment?' or 'what level of confidence is necessary for the predictions?'.
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13
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Martín-Hernández MDC, Burnand D, Jud C, Portmann R, Egger L. Interaction of magnetic silica nanoparticles with food proteins during in vitro digestion. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2021.112303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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14
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Katimba HA, Wang R, Cheng C. Current findings support the potential use of bioactive peptides in enhancing zinc absorption in humans. Crit Rev Food Sci Nutr 2021:1-21. [PMID: 34708681 DOI: 10.1080/10408398.2021.1996328] [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] [Indexed: 12/29/2022]
Abstract
More than two billion people around the world are affected by zinc deficiency, mainly due to the inadequate intake and absorption of zinc. Based on recent research findings, the bioactive peptides could potentially be used to combat zinc deficiency particularly due to their Zinc chelating ability. The main aim of this review was to present current findings, supporting the potential use of bioactive peptides based on their ability to enhance zinc absorption. In-vivo, in-vitro, and ex-vivo studies have demonstrated that zinc chelating peptides can enhance the retention, transportation, and absorption of zinc. Comparative studies on zinc bioavailability from protein hydrolysates and zinc salts have demonstrated that the protein hydrolysates-zinc complexes are more bioavailable than the zinc salts. Data from the structure-function relationship of zinc chelating peptides suggest that the zinc chelating capacities of peptides increase in the following order; the position of zinc chelator > zinc chelator strength > abundance of zinc chelators > net charge > molecular weight. In addition, the transport mechanism of peptide-zinc complex is hypothesized, and the potential use of bioactive peptides based on their safety and taste and limitations to their commercialization are also discussed.
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Affiliation(s)
- Hija Athman Katimba
- Department of Food Science and Engineering, Harbin Institute of Technology, Harbin, China.,Department of Food Science and Engineering, School of Agriculture & Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Rongchun Wang
- Department of Food Science and Engineering, Harbin Institute of Technology, Harbin, China
| | - Cuilin Cheng
- Department of Food Science and Engineering, Harbin Institute of Technology, Harbin, China
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15
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Iacomino G, Rotondi Aufiero V, Di Stasio L, Picascia S, Iannaccone N, Giardullo N, Troncone R, Gianfrani C, Mamone G, Mazzarella G. Triticum monococcum amylase trypsin inhibitors possess a reduced potential to elicit innate immune response in celiac patients compared to Triticum aestivum. Food Res Int 2021; 145:110386. [PMID: 34112389 DOI: 10.1016/j.foodres.2021.110386] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 04/08/2021] [Accepted: 05/02/2021] [Indexed: 12/19/2022]
Abstract
SCOPE Several studies reported a role of amylase/trypsin-inhibitors (ATIs) of common wheat species in promoting immune reactions. Here, we investigated in celiac disease (CD), the immunogenic properties of ATIs from diploid compared to common hexaploid wheats after an in vitro proteolytic hydrolysis. METHODS AND RESULTS ATIs purified from two lines of diploid Triticum monococcum (TM), Monlis and Norberto-ID331, and from Triticum aestivum (TA), Sagittario, were digested with pepsin-chymotrypsin (PC) enzymes and analyzed using a proteomic approach, and subsequently their immune stimulatory properties were investigated on jejunal biopsies and T-cell lines from CD patients. No significant expression of IL-8 and TNF-α were detected on biopsies cultured with ATIs from TM in comparison with ATIs from TA. No significant IFN-γ production was observed in intestinal gliadin- raised T-cells in response to ATIs from both TM and TA wheats. Proteomic results revealed that both TM ATIs showed reduced stability to proteolytic enzymes compared to TA ones. CONCLUSION TM ATIs are substantially different from those of TA, showing a reduced ability to trigger the innate immunity in CD and a higher susceptibility to enzymatic hydrolysis.
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Affiliation(s)
| | | | | | - Stefania Picascia
- Institute of Biochemistry and Cell Biology, CNR, Napoli, Italy; E.L.F.I.D, University "Federico II" Napoli, Italy
| | | | - Nicola Giardullo
- Gastroenterology Department, S. G. Moscati Hospital, Avellino, Italy
| | - Riccardo Troncone
- Department of Translational Medical Science and E.L.F.I.D, University "Federico II" Napoli, Italy
| | - Carmen Gianfrani
- Institute of Biochemistry and Cell Biology, CNR, Napoli, Italy; E.L.F.I.D, University "Federico II" Napoli, Italy
| | | | - Giuseppe Mazzarella
- Institute of Food Sciences, CNR, Avellino, Italy; E.L.F.I.D, University "Federico II" Napoli, Italy.
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16
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Czolk R, Klueber J, Sørensen M, Wilmes P, Codreanu-Morel F, Skov PS, Hilger C, Bindslev-Jensen C, Ollert M, Kuehn A. IgE-Mediated Peanut Allergy: Current and Novel Predictive Biomarkers for Clinical Phenotypes Using Multi-Omics Approaches. Front Immunol 2021; 11:594350. [PMID: 33584660 PMCID: PMC7876438 DOI: 10.3389/fimmu.2020.594350] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 12/11/2020] [Indexed: 01/22/2023] Open
Abstract
Food allergy is a collective term for several immune-mediated responses to food. IgE-mediated food allergy is the best-known subtype. The patients present with a marked diversity of clinical profiles including symptomatic manifestations, threshold reactivity and reaction kinetics. In-vitro predictors of these clinical phenotypes are evasive and considered as knowledge gaps in food allergy diagnosis and risk management. Peanut allergy is a relevant disease model where pioneer discoveries were made in diagnosis, immunotherapy and prevention. This review provides an overview on the immune basis for phenotype variations in peanut-allergic individuals, in the light of future patient stratification along emerging omic-areas. Beyond specific IgE-signatures and basophil reactivity profiles with established correlation to clinical outcome, allergenomics, mass spectrometric resolution of peripheral allergen tracing, might be a fundamental approach to understand disease pathophysiology underlying biomarker discovery. Deep immune phenotyping is thought to reveal differential cell responses but also, gene expression and gene methylation profiles (eg, peanut severity genes) are promising areas for biomarker research. Finally, the study of microbiome-host interactions with a focus on the immune system modulation might hold the key to understand tissue-specific responses and symptoms. The immune mechanism underlying acute food-allergic events remains elusive until today. Deciphering this immunological response shall enable to identify novel biomarker for stratification of patients into reaction endotypes. The availability of powerful multi-omics technologies, together with integrated data analysis, network-based approaches and unbiased machine learning holds out the prospect of providing clinically useful biomarkers or biomarker signatures being predictive for reaction phenotypes.
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Affiliation(s)
- Rebecca Czolk
- Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg
- Faculty of Science, Technology and Medicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Julia Klueber
- Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg
- Department of Dermatology and Allergy Center, Odense Research Center for Anaphylaxis, University of Southern Denmark, Odense, Denmark
| | - Martin Sørensen
- Department of Pediatric and Adolescent Medicine, University Hospital of North Norway, Tromsø, Norway
- Pediatric Research Group, Department of Clinical Medicine, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, Norway
| | - Paul Wilmes
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Françoise Codreanu-Morel
- Department of Allergology and Immunology, Centre Hospitalier de Luxembourg-Kanner Klinik, Luxembourg, Luxembourg
| | - Per Stahl Skov
- Department of Dermatology and Allergy Center, Odense Research Center for Anaphylaxis, University of Southern Denmark, Odense, Denmark
- RefLab ApS, Copenhagen, Denmark
- Institute of Immunology, National University of Copenhagen, Copenhagen, Denmark
| | - Christiane Hilger
- Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg
| | - Carsten Bindslev-Jensen
- Department of Dermatology and Allergy Center, Odense Research Center for Anaphylaxis, University of Southern Denmark, Odense, Denmark
| | - Markus Ollert
- Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg
- Department of Dermatology and Allergy Center, Odense Research Center for Anaphylaxis, University of Southern Denmark, Odense, Denmark
| | - Annette Kuehn
- Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg
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17
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18
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Naegeli H, Bresson J, Dalmay T, Dewhurst IC, Epstein MM, Firbank LG, Guerche P, Hejatko J, Moreno FJ, Mullins E, Nogué F, Rostoks N, Sánchez Serrano JJ, Savoini G, Veromann E, Veronesi F, Dumont AF. Statement on in vitro protein digestibility tests in allergenicity and protein safety assessment of genetically modified plants. EFSA J 2021; 19:e06350. [PMID: 33473251 PMCID: PMC7801955 DOI: 10.2903/j.efsa.2021.6350] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
This statement supplements and updates the GMO Panel guidance document on allergenicity of genetically modified (GM) plants published in 2017. In that guidance document, the GMO Panel considered that additional investigations on in vitro protein digestibility were needed before providing any additional recommendations in the form of guidance to applicants. Thus, an interim phase was proposed to assess the utility of an enhanced in vitro digestion test, as compared to the classical pepsin resistance test. Historically, resistance to degradation by pepsin using the classical pepsin resistance test has been considered as additional information, in a weight-of-evidence approach, for the assessment of allergenicity and toxicity of newly expressed proteins in GM plants. However, more recent evidence does not support this test as a good predictor of allergenic potential for hazard. Furthermore, there is a need for more reliable systems to predict the fate of the proteins in the gastrointestinal tract and how they interact with the relevant human cells. Nevertheless, the classical pepsin resistance test can still provide some information on the physicochemical properties of novel proteins relating to their stability under acidic conditions. But other methods can be used to obtain data on protein's structural and/or functional integrity. It is acknowledged that the classical pepsin resistance test is embedded into international guidelines, e.g. Codex Alimentarius and Regulation (EU) No 503/2013. For future development, a deeper understanding of protein digestion in the gastrointestinal tract could enable the framing of more robust strategies for the safety assessment of proteins. Given the high complexity of the digestion and absorption process of dietary proteins, it is needed to clarify and identify the aspects that could be relevant to assess potential risks of allergenicity and toxicity of proteins. To this end, a series of research questions to be addressed are also formulated in this statement.
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19
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Abstract
This review searched for published evidence that could explain how different physicochemical properties impact on the allergenicity of food proteins and if their effects would follow specific patterns among distinct protein families. Owing to the amount and complexity of the collected information, this literature overview was divided in two articles, the current one dedicated to protein families of plant allergens and a second one focused on animal allergens. Our extensive analysis of the available literature revealed that physicochemical characteristics had consistent effects on protein allergenicity for allergens belonging to the same protein family. For example, protein aggregation contributes to increased allergenicity of 2S albumins, while for legumins and cereal prolamins, the same phenomenon leads to a reduction. Molecular stability, related to structural resistance to heat and proteolysis, was identified as the most common feature promoting plant protein allergenicity, although it fails to explain the potency of some unstable allergens (e.g. pollen-related food allergens). Furthermore, data on physicochemical characteristics translating into clinical effects are limited, mainly because most studies are focused on in vitro IgE binding. Clinical data assessing how these parameters affect the development and clinical manifestation of allergies is minimal, with only few reports evaluating the sensitising capacity of modified proteins (addressing different physicochemical properties) in murine allergy models. In vivo testing of modified pure proteins by SPT or DBPCFC is scarce. At this stage, a systematic approach to link the physicochemical properties with clinical plant allergenicity in real-life scenarios is still missing.
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20
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Di Stasio L, d'Acierno A, Picariello G, Ferranti P, Nitride C, Mamone G. In vitro gastroduodenal and jejunal brush border membrane digestion of raw and roasted tree nuts. Food Res Int 2020; 136:109597. [PMID: 32846622 DOI: 10.1016/j.foodres.2020.109597] [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: 03/26/2020] [Revised: 07/22/2020] [Accepted: 07/23/2020] [Indexed: 10/23/2022]
Abstract
Heat treatments induce chemical/physical modifications, which may affect the stability to enzymatic digestion and consequently the allergenicity of food proteins to a varying extent, depending on the time/temperature regimen. Herein, we evaluated the stability to digestion of whole tree nut (walnuts, hazelnuts and almonds) allergens in a food digestion model reflecting the real one by, taking into consideration the allergen-containing processed (roasted) food. To this aim, whole raw and roasted tree nuts were subjected to in vitro digestion combining the harmonized oral-gastric-duodenal digestion models with brush border membrane enzymes (BBM) to simulate the jejunal degradation of peptides. The degradation of allergens was monitored by integrated proteomic/peptidomic and bio-informatic tools. Roasting increased digestibility of tree nuts, since very few peptides were detected in digested samples (<6.5 kDa fraction). After BBM digestion step, the degradation of peptides was enhanced in roasted walnuts and hazelnuts compared to the raw counterpart. Conversely, almond allergens showed a different behaviour, since the presence of resistant peptides was more evident for roasted almonds, probably because of the hydrolysis of high molecular weight aggregates generated during roasting. Our results provide new insight into the relationship between thermal processing and metabolic fate of tree nut allergens, highlighting the importance of investigating the digestion stability of whole allergenic food, rather than purified proteins.
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Affiliation(s)
- Luigia Di Stasio
- Institute of Food Sciences - National Research Council, Avellino, Italy; Department of Agriculture - University of Naples - Federico II, Portici (NA), Italy
| | - Antonio d'Acierno
- Institute of Food Sciences - National Research Council, Avellino, Italy
| | | | - Pasquale Ferranti
- Department of Agriculture - University of Naples - Federico II, Portici (NA), Italy
| | - Chiara Nitride
- Department of Agriculture - University of Naples - Federico II, Portici (NA), Italy
| | - Gianfranco Mamone
- Institute of Food Sciences - National Research Council, Avellino, Italy.
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21
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Rao H, Baricevic I, Bernard H, Smith F, Sayers R, Balasundaram A, Costello CA, Padfield P, Semic‐Jusufagic A, Simpson A, Adel‐Patient K, Xue W, Mills ENC. The Effect of the Food Matrix on the In Vitro Bio‐Accessibility and IgE Reactivity of Peanut Allergens. Mol Nutr Food Res 2020; 64:e1901093. [DOI: 10.1002/mnfr.201901093] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 02/18/2020] [Indexed: 11/09/2022]
Affiliation(s)
- Huan Rao
- School of Biological SciencesManchester Institute of BiotechnologyManchester Academic Health Sciences CentreUniversity of Manchester Manchester M1 7DN UK
- College of Food Science and Nutritional EngineeringChina Agricultural University Beijing 100083 China
| | - Ivona Baricevic
- School of Biological SciencesManchester Institute of BiotechnologyManchester Academic Health Sciences CentreUniversity of Manchester Manchester M1 7DN UK
| | - Hervé Bernard
- UMR Service de Pharmacologie et ImmunoanalyseCEAINRAUniversité Paris‐SaclayLaboratoire d'Immuno‐Allergie Alimentaire Gif‐sur‐Yvette F‐91191 France
| | - Frances Smith
- School of Biological SciencesManchester Institute of BiotechnologyManchester Academic Health Sciences CentreUniversity of Manchester Manchester M1 7DN UK
| | - Rebekah Sayers
- School of Biological SciencesManchester Institute of BiotechnologyManchester Academic Health Sciences CentreUniversity of Manchester Manchester M1 7DN UK
| | - Anuhradha Balasundaram
- School of Biological SciencesManchester Institute of BiotechnologyManchester Academic Health Sciences CentreUniversity of Manchester Manchester M1 7DN UK
| | - Carol Ann Costello
- School of Biological SciencesManchester Institute of BiotechnologyManchester Academic Health Sciences CentreUniversity of Manchester Manchester M1 7DN UK
| | - Philip Padfield
- School of Biological SciencesManchester Institute of BiotechnologyManchester Academic Health Sciences CentreUniversity of Manchester Manchester M1 7DN UK
| | - Aida Semic‐Jusufagic
- School of Biological SciencesManchester Academic Health Sciences CentreWythenshawe Hospital Manchester University NHS Foundation Trust Manchester M23 9LT UK
| | - Angela Simpson
- School of Biological SciencesManchester Academic Health Sciences CentreWythenshawe Hospital Manchester University NHS Foundation Trust Manchester M23 9LT UK
| | - Karine Adel‐Patient
- UMR Service de Pharmacologie et ImmunoanalyseCEAINRAUniversité Paris‐SaclayLaboratoire d'Immuno‐Allergie Alimentaire Gif‐sur‐Yvette F‐91191 France
| | - Wentong Xue
- College of Food Science and Nutritional EngineeringChina Agricultural University Beijing 100083 China
| | - E. N. Clare Mills
- School of Biological SciencesManchester Institute of BiotechnologyManchester Academic Health Sciences CentreUniversity of Manchester Manchester M1 7DN UK
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22
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Hands CM, Sayers RL, Nitride C, Gethings LA, Mills ENC. A multiple reaction monitoring method for determining peanut (Arachis hypogea) allergens in serum using quadrupole and time-of-flight mass spectrometry. Anal Bioanal Chem 2020; 412:2815-2827. [PMID: 32125467 PMCID: PMC7196080 DOI: 10.1007/s00216-020-02508-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 01/21/2020] [Accepted: 02/11/2020] [Indexed: 11/30/2022]
Abstract
Peanut is a major cause of severe IgE-mediated food allergic reactions, which can be exacerbated by factors, such as exercise, that may increase allergen uptake into the circulation. Enzyme-linked immunosorbent assays (ELISAs) have been used to determine allergen uptake into serum, but there are concerns over their specificity and a confirmatory method is required. Mass spectrometry (MS) methods have the potential to provide rigorous alternatives for allergen determination. A suite of peptide targets representing the major clinically relevant peanut allergens previously applied in food analysis were used to develop a targeted multiple reaction monitoring (MRM) method for determination of peanut in serum. Depletion of serum using affinity chromatography was found to be essential to allow detection of the peptide targets. A comparison of triple quadrupole and Q-TOF methods showed that one Ara h 2 peptide was only detected by the Q-TOF, the other peptide targets giving similar assay sensitivities with both MS platforms, although transitions for all the peptides were detected more consistently with the Q-TOF. The Q-TOF MRM assay detected peanut from spiked serum more effectively than the triple quadrupole assay, with Ara h 3 being detected down to 3 mg total peanut protein/L of serum, comparable with an Ara h 3-specific ELISA. The poor recoveries observed for both methods are likely due to loss of peanut immune complexes during the serum depletion process. Nevertheless, the Q-TOF MRM method has much promise to confirm the uptake of peanut proteins in serum samples providing immune complexes can be disrupted effectively prior to depletion. Graphical abstract.
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Affiliation(s)
- Charlotte M Hands
- Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, Manchester Institute of Biotechnology, Manchester Academic Health Sciences Centre, University of Manchester, Manchester, M1 7DN, UK
| | - Rebekah L Sayers
- Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, Manchester Institute of Biotechnology, Manchester Academic Health Sciences Centre, University of Manchester, Manchester, M1 7DN, UK
| | - Chiara Nitride
- Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, Manchester Institute of Biotechnology, Manchester Academic Health Sciences Centre, University of Manchester, Manchester, M1 7DN, UK
| | - Lee A Gethings
- Waters Corporation, Stamford Avenue, Altrincham Road, Wilmslow, SK9 4AX, UK
| | - E N Clare Mills
- Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, Manchester Institute of Biotechnology, Manchester Academic Health Sciences Centre, University of Manchester, Manchester, M1 7DN, UK.
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23
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Liu L, Li S, Zheng J, Bu T, He G, Wu J. Safety considerations on food protein-derived bioactive peptides. Trends Food Sci Technol 2020. [DOI: 10.1016/j.tifs.2019.12.022] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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24
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Di Stasio L, Tranquet O, Picariello G, Ferranti P, Morisset M, Denery-Papini S, Mamone G. Comparative analysis of eliciting capacity of raw and roasted peanuts: the role of gastrointestinal digestion. Food Res Int 2020; 127:108758. [DOI: 10.1016/j.foodres.2019.108758] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 10/09/2019] [Accepted: 10/14/2019] [Indexed: 01/06/2023]
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25
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Torcello-Gómez A, Dupont D, Jardin J, Briard-Bion V, Deglaire A, Risse K, Mechoulan E, Mackie A. Human gastrointestinal conditions affectin vitrodigestibility of peanut and bread proteins. Food Funct 2020; 11:6921-6932. [DOI: 10.1039/d0fo01451f] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Peanut and wheat proteins either isolated or within the food matrix were subjected to different staticin vitrodigestion models (infant, fed and fasted adult). Proteolysis differed across models.
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Affiliation(s)
| | | | | | | | | | - Kerstin Risse
- School of Food Science and Nutrition
- University of Leeds
- Leeds LS2 9JT
- UK
| | - Elodie Mechoulan
- School of Food Science and Nutrition
- University of Leeds
- Leeds LS2 9JT
- UK
| | - Alan Mackie
- School of Food Science and Nutrition
- University of Leeds
- Leeds LS2 9JT
- UK
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26
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Prodić I, Smiljanić K, Simović A, Radosavljević J, Ćirković Veličković T. Thermal Processing of Peanut Grains Impairs Their Mimicked Gastrointestinal Digestion While Downstream Defatting Treatments Affect Digestomic Profiles. Foods 2019; 8:foods8100463. [PMID: 31658590 PMCID: PMC6836028 DOI: 10.3390/foods8100463] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 09/29/2019] [Accepted: 10/02/2019] [Indexed: 11/16/2022] Open
Abstract
Resistance to digestion by digestive proteases represents a critical property of many food allergens. Recently, a harmonized INFOGEST protocol was proposed for solid food digestion. The protocol proposes digestion conditions suitable for all kinds of solid and liquid foods. However, peanuts, as a lipid-rich food, represent a challenge for downstream analyses of the digestome. This is particularly reflected in the methodological difficulties in analyzing proteins and peptides in the presence of lipids. Therefore, the removal of the lipids seems to be a prerequisite for the downstream analysis of digestomes of lipid-rich foods. Here, we aimed to compare the digestomes of raw and thermally treated (boiled and roasted) peanuts, resulting from the INFOGEST digestion protocol for solid food, upon defatting the digests in two different manners. The most reproducible results of peanut digests were obtained in downstream analyses on TCA/acetone defatting. Unfortunately, defatting, even with an optimized TCA/acetone procedure, leads to the loss of proteins and peptides. The results of our study reveal that different thermal treatments of peanuts affect protein extraction and gastric/gastrointestinal digestion. Roasting of peanuts seems to enhance the extraction of proteins during intestinal digestion to a notable extent. The increased intestinal digestion is a consequence of the delayed extraction of thermally treated peanut proteins, which are poorly soluble in acidic gastric digestion juice but are easily extracted when the pH of the media is raised as in the subsequent intestinal phase of the digestion. Thermal processing of peanuts impaired the gastrointestinal digestion of the peanut proteins, especially in the case of roasted samples.
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Affiliation(s)
- Ivana Prodić
- University of Belgrade-Faculty of Chemistry, Innovation Center Ltd, 11000 Belgrade, Serbia.
| | - Katarina Smiljanić
- University of Belgrade-Faculty of Chemistry, Center of Excellence for Molecular Food Sciences & Department of Biochemistry, 11000 Belgrade, Serbia.
| | - Ana Simović
- University of Belgrade-Faculty of Chemistry, Center of Excellence for Molecular Food Sciences & Department of Biochemistry, 11000 Belgrade, Serbia.
| | - Jelena Radosavljević
- University of Belgrade-Faculty of Chemistry, Center of Excellence for Molecular Food Sciences & Department of Biochemistry, 11000 Belgrade, Serbia.
| | - Tanja Ćirković Veličković
- University of Belgrade-Faculty of Chemistry, Center of Excellence for Molecular Food Sciences & Department of Biochemistry, 11000 Belgrade, Serbia.
- Ghent University Global Campus, Incheon 406-840, Korea.
- Ghent University, Faculty of Bioscience Engineering, 9000 Ghent, Belgium.
- Serbian Academy of Sciences and Arts, 11000 Belgrade, Serbia.
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27
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Verhoeckx K, Bøgh KL, Dupont D, Egger L, Gadermaier G, Larré C, Mackie A, Menard O, Adel-Patient K, Picariello G, Portmann R, Smit J, Turner P, Untersmayr E, Epstein MM. The relevance of a digestibility evaluation in the allergenicity risk assessment of novel proteins. Opinion of a joint initiative of COST action ImpARAS and COST action INFOGEST. Food Chem Toxicol 2019; 129:405-423. [PMID: 31063834 DOI: 10.1016/j.fct.2019.04.052] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Revised: 04/25/2019] [Accepted: 04/27/2019] [Indexed: 01/09/2023]
Abstract
The current allergenicity assessment of novel proteins is based on the EFSA GMO guidance. Recently, EFSA launched a new guidance document on allergenicity assessment of GM plants (2017). This document describes, amongst other topics, the new scientific and regulatory developments on in vitro protein digestibility tests. The EFSA GMO Panel stated that for in vitro protein digestibility tests, additional investigations are needed before any additional recommendation in the form of guidance can be provided. To this end, an interim phase is considered necessary to evaluate the revisions to the in vitro gastrointestinal digestion test, proposed by EFSA. This prompted the establishment of a joint workshop through two COST Action networks: COST Action ImpARAS and COST Acton INFOGEST. In 2017, a workshop was organised to discuss the relevance of digestion in allergenicity risk assessment and how to potentially improve the current methods and readouts. The outcome of the workshop is that there is no rationale for a clear readout that is predictive for allergenicity and we suggest to omit the digestion test from the allergenicity assessment strategy for now, and put an effort into filling the knowledge gaps as summarized in this paper first.
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Affiliation(s)
| | - Katrine Lindholm Bøgh
- National Food Institute, Technical University of Denmark, DK-2800, Kgs. Lyngby, Denmark.
| | | | - Lotti Egger
- Agroscope, Schwarzenburgstr. 161, 3003, Bern, Charlotte, Switzerland.
| | - Gabriele Gadermaier
- University of Salzburg, Department of Biosciences, Hellbrunnerstraße 34, 5020 Salzburg, Austria.
| | - Colette Larré
- INRA UR1268 BIA, Rue de la Géraudière, BP 71627, 44316 Nantes, France.
| | - Alan Mackie
- School of Food Science and Nutrition, University of Leeds, LS2 9JT, UK.
| | | | - Karine Adel-Patient
- UMR Service de Pharmacologie et Immunoanalyse, Laboratoire d'Immuno-Allergie Alimentaire, CEA, INRA, Université Paris-Saclay, F-91191, Gif-sur-Yvette Cedex, France.
| | | | - Reto Portmann
- Agroscope, Schwarzenburgstr. 161, 3003 Bern, Switzerland.
| | - Joost Smit
- Institute of Risk Assessment Sciences, Utrecht University, Yalelaan 104, 3584CM, Utrecht, the Netherlands.
| | - Paul Turner
- Section of Paediatrics, Imperial College London, London, United Kingdom.
| | - Eva Untersmayr
- Institute of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria.
| | - Michelle M Epstein
- Department of Dermatology, Experimental Allergy Laboratory, Medical University of Vienna, Waehringer Guertel 18-20 room 4P9.02, 1090, Vienna, Austria.
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Mamone G, Sciammaro L, De Caro S, Di Stasio L, Siano F, Picariello G, Puppo MC. Comparative analysis of protein composition and digestibility of Ceratonia siliqua L. and Prosopis spp. seed germ flour. Food Res Int 2019; 120:188-195. [PMID: 31000229 DOI: 10.1016/j.foodres.2019.02.035] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 02/18/2019] [Accepted: 02/19/2019] [Indexed: 11/25/2022]
Abstract
By virtue of exclusive nutrient composition and nutritional properties, seed germ flours from both European carob (Ceratonia siliqua L.) and South American algarrobo (Prosopis alba and Prosopis nigra) or vinal (Prosopis ruscifolia) have potential as a high nutritional value and health-promoting ingredient for food formulations. In order to define their compositional and functional properties, we investigated the germ protein content of carob compared to the P. alba, P. nigra and P. ruscifolia counterparts, applying proteomics and complementary methods. The mono- and two-dimensional electrophoretic profiles of Prosopis spp. were very similar among one another, while C. siliqua exhibited significant differences. Attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy highlighted a dominant β-sheet structural conformation for C. siliqua, suggesting that carob germ flour might more suited than Prosopis germ flour for baking and food technological applications. In contrast, Prosopis spp. contained a more adequate nutritional value than C. siliqua, in terms of essential amino acid complement. Both carob and algarrobo germ flour samples were highly digestible, as demonstrated by in vitro simulated gastrointestinal digestion, releasing high amounts of free amino acids and only minor proportions of low molecular weight peptides.
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Affiliation(s)
- Gianfranco Mamone
- Istituto di Scienze dell'Alimentazione, Consiglio Nazionale delle Ricerche (CNR), Via Roma 64, I-83100 Avellino, Italy.
| | - Leonardo Sciammaro
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA - UNLP - CONICET), Calle 47 y 116, 1900 La Plata, Argentina
| | - Salvatore De Caro
- Istituto di Scienze dell'Alimentazione, Consiglio Nazionale delle Ricerche (CNR), Via Roma 64, I-83100 Avellino, Italy
| | - Luigia Di Stasio
- Istituto di Scienze dell'Alimentazione, Consiglio Nazionale delle Ricerche (CNR), Via Roma 64, I-83100 Avellino, Italy
| | - Francesco Siano
- Istituto di Scienze dell'Alimentazione, Consiglio Nazionale delle Ricerche (CNR), Via Roma 64, I-83100 Avellino, Italy
| | - Gianluca Picariello
- Istituto di Scienze dell'Alimentazione, Consiglio Nazionale delle Ricerche (CNR), Via Roma 64, I-83100 Avellino, Italy
| | - Maria Cecilia Puppo
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA - UNLP - CONICET), Calle 47 y 116, 1900 La Plata, Argentina
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29
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INFOGEST static in vitro simulation of gastrointestinal food digestion. Nat Protoc 2019; 14:991-1014. [PMID: 30886367 DOI: 10.1038/s41596-018-0119-1] [Citation(s) in RCA: 1696] [Impact Index Per Article: 339.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 12/20/2018] [Indexed: 01/23/2023]
Abstract
Developing a mechanistic understanding of the impact of food structure and composition on human health has increasingly involved simulating digestion in the upper gastrointestinal tract. These simulations have used a wide range of different conditions that often have very little physiological relevance, and this impedes the meaningful comparison of results. The standardized protocol presented here is based on an international consensus developed by the COST INFOGEST network. The method is designed to be used with standard laboratory equipment and requires limited experience to encourage a wide range of researchers to adopt it. It is a static digestion method that uses constant ratios of meal to digestive fluids and a constant pH for each step of digestion. This makes the method simple to use but not suitable for simulating digestion kinetics. Using this method, food samples are subjected to sequential oral, gastric and intestinal digestion while parameters such as electrolytes, enzymes, bile, dilution, pH and time of digestion are based on available physiological data. This amended and improved digestion method (INFOGEST 2.0) avoids challenges associated with the original method, such as the inclusion of the oral phase and the use of gastric lipase. The method can be used to assess the endpoints resulting from digestion of foods by analyzing the digestion products (e.g., peptides/amino acids, fatty acids, simple sugars) and evaluating the release of micronutrients from the food matrix. The whole protocol can be completed in ~7 d, including ~5 d required for the determination of enzyme activities.
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30
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Mamone G, Di Stasio L, De Caro S, Picariello G, Nicolai MA, Ferranti P. Comprehensive analysis of the peanut allergome combining 2-DE gel-based and gel-free proteomics. Food Res Int 2019; 116:1059-1065. [DOI: 10.1016/j.foodres.2018.09.045] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 09/03/2018] [Accepted: 09/17/2018] [Indexed: 02/04/2023]
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31
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Rao H, Tian Y, Fu W, Xue W. In vitro digestibility and immunoreactivity of thermally processed peanut. FOOD AGR IMMUNOL 2018. [DOI: 10.1080/09540105.2018.1499710] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
Affiliation(s)
- Huan Rao
- Beijing Advanced Innovation Centre for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, People’s Republic of China
| | - Yang Tian
- Beijing Advanced Innovation Centre for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, People’s Republic of China
| | - Wenhui Fu
- Beijing Advanced Innovation Centre for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, People’s Republic of China
| | - Wentong Xue
- Beijing Advanced Innovation Centre for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, People’s Republic of China
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32
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Bräcker J, Brockmeyer J. Characterization and Detection of Food Allergens Using High-Resolution Mass Spectrometry: Current Status and Future Perspective. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:8935-8940. [PMID: 30080969 DOI: 10.1021/acs.jafc.8b02265] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Allergic reactions to food are among the major food safety concerns in industrialized countries, and it is estimated that approximately 5% of the population suffers from immunoglobulin-E-mediated food allergy. High-resolution mass spectrometry has become one of the most important techniques for the molecular characterization of allergens, including structural modification, degradation in the gastrointestinal environment, or identification of suitable marker peptides for the development of novel analytical approaches, in the past decade. This perspective aims to briefly summarize the current situation and discuss future developments.
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Affiliation(s)
- Julia Bräcker
- Institute of Biochemistry and Technical Biochemistry, Department of Food Chemistry , University of Stuttgart , Allmandring 5b , 70569 Stuttgart , Germany
| | - Jens Brockmeyer
- Institute of Biochemistry and Technical Biochemistry, Department of Food Chemistry , University of Stuttgart , Allmandring 5b , 70569 Stuttgart , Germany
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33
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The Effect of Digestion and Digestibility on Allergenicity of Food. Nutrients 2018; 10:nu10091129. [PMID: 30134536 PMCID: PMC6164088 DOI: 10.3390/nu10091129] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 08/03/2018] [Accepted: 08/13/2018] [Indexed: 01/08/2023] Open
Abstract
Food allergy prevalence numbers are still on the rise. Apart from environmental influences, dietary habits, food availability and life-style factors, medication could also play a role. For immune tolerance of food, several contributing factors ensure that dietary compounds are immunologically ignored and serve only as source for energy and nutrient supply. Functional digestion along the gastrointestinal tract is essential for the molecular breakdown and a prerequisite for appropriate uptake in the intestine. Digestion and digestibility of carbohydrates and proteins thus critically affect the risk of food allergy development. In this review, we highlight the influence of amylases, gastric acid- and trypsin-inhibitors, as well as of food processing in the context of food allergenicity.
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34
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Pekar J, Ret D, Untersmayr E. Stability of allergens. Mol Immunol 2018; 100:14-20. [PMID: 29606336 PMCID: PMC6020993 DOI: 10.1016/j.molimm.2018.03.017] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 03/19/2018] [Accepted: 03/20/2018] [Indexed: 02/07/2023]
Abstract
For proteins to cause IgE-mediated allergic reactions, several common characteristics have to be defined, including small molecular size, solubility and stability to changing pH levels and enzymatic degradation. Nevertheless, these features are not unique for potent allergens, but are also observed in non-allergenic proteins. Due to the increasing awareness by regulatory authorities regarding the allergy pandemic, definition of characteristics unique to potent allergens would facilitate allergenicity assessment in the future. Despite major research efforts even to date the features unique for major allergens have not been elucidated so far. The route of allergen entry into the organism determines to a great extent these required characteristics. Especially orally ingested allergens are exposed to the harsh milieu of the gastrointestinal tract but might additionally be influenced by food processing. Depending on molecular properties such as disulphide bonds contributing to protein fold and formation of conformational IgE epitopes, posttranslational protein modification or protein food matrix interactions, enzymatic and thermal stability might differ between allergens. Moreover, also ligand binding influences structural stability. In the current review article, we aim at highlighting specific characteristics and molecular pattern contributing to a stabilized protein structure and overall allergenicity.
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Affiliation(s)
- Judith Pekar
- 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.
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35
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Effect of thermal/pressure processing and simulated human digestion on the immunoreactivity of extractable peanut allergens. Food Res Int 2018; 109:126-137. [PMID: 29803434 DOI: 10.1016/j.foodres.2018.04.021] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Revised: 04/06/2018] [Accepted: 04/12/2018] [Indexed: 11/24/2022]
Abstract
Peanut allergy is one of the most widespread types of food allergies especially affecting developed countries. To reduce the risk of triggering allergic reactions, several technological strategies have been devised to modify or remove allergens from foods. Herein we investigated the combination of high temperature and pressure on the modulation of peanuts immunoreactivity after simulated gastro-duodenal digestion. Extractable proteins of raw and autoclaved peanuts were separated on SDS-PAGE and immunogenicity was assessed by ELISA and Western Blot analyses. Proteins surviving the heat treatment and reacting towards allergic patients' sera were analysed and attributed to Ara h 3 and Ara h 1 proteins by untargeted LC-high resolution-MS/MS. A progressive reduction in the intensity of the major allergen proteins was also highlighted in the protein fraction extracted from autoclaved peanuts, with a total disappearance of the high molecular allergens when samples were preliminary exposed to 2 h hydration although the lower molecular weight fraction was not investigated in the present work. Furthermore, raw and processed peanuts underwent simulated digestion experiments and the IgE binding was assessed by using allergic patients' sera. The persistence of an immunoreactive band was displayed around 20 kDa. In conclusion, the synergistic effects of heat and pressure played a pivotal role in the disappearance of the major peanut allergens also contributing to the significant alteration of the final immunoreactivity. In addition, the surviving of allergenic determinants in peanuts after gastrointestinal breakdown provides more insights on the fate of allergenic proteins after autoclaving treatments.
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36
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Prodic I, Stanic-Vucinic D, Apostolovic D, Mihailovic J, Radibratovic M, Radosavljevic J, Burazer L, Milcic M, Smiljanic K, van Hage M, Cirkovic Velickovic T. Influence of peanut matrix on stability of allergens in gastric-simulated digesta: 2S albumins are main contributors to the IgE reactivity of short digestion-resistant peptides. Clin Exp Allergy 2018; 48:731-740. [PMID: 29412488 DOI: 10.1111/cea.13113] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2017] [Revised: 12/22/2017] [Accepted: 01/09/2018] [Indexed: 01/20/2023]
Abstract
BACKGROUND Most food allergens sensitizing via the gastrointestinal tract are stable proteins that are resistant to pepsin digestion, in particular major peanut allergens, Ara h 2 and Ara h 6. Survival of their large fragments is essential for sensitizing capacity. However, the immunoreactive proteins/peptides to which the immune system of the gastrointestinal tract is exposed during digestion of peanut proteins are unknown. Particularly, the IgE reactivity of short digestion-resistant peptides (SDRPs; <10 kDa) released by gastric digestion under standardized and physiologically relevant in vitro conditions has not been investigated. OBJECTIVE The aim of this study was to investigate and identify digestion products of major peanut allergens and in particular to examine IgE reactivity of SDRPs released by pepsin digestion of whole peanut grains. METHODS Two-dimensional gel-based proteomics and shotgun peptidomics, immunoblotting with allergen-specific antibodies from peanut-sensitized patients, enzyme-linked immunosorbent inhibition assay and ImmunoCAP tests, including far ultraviolet-circular dichroism spectroscopy were used to identify and characterize peanut digesta. RESULTS Ara h 2 and Ara h 6 remained mostly intact, and SDRPs from Ara h 2 were more potent in inhibiting IgE binding than Ara h 1 and Ara 3. Ara h 1 and Ara h 3 exhibited sequential digestion into a series of digestion-resistant peptides with preserved allergenic capacity. A high number of identified SDRPs from Ara h 1, Ara h 2 and Ara h 3 were part of short continuous epitope sequences and possessed substantial allergenic potential. CONCLUSION AND CLINICAL RELEVANCE Peanut grain digestion by oral and gastric phase enzymes generates mixture of products, where the major peanut allergens remain intact and their digested peptides have preserved allergenic capacity highlighting their important roles in allergic reactions to peanut.
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Affiliation(s)
- I Prodic
- Faculty of Chemistry, Innovation Centre Ltd., Belgrade, Serbia
| | - D Stanic-Vucinic
- University of Belgrade - Faculty of Chemistry, Center of Excellence for Molecular Food Sciences, Belgrade, Serbia.,University of Belgrade - Faculty of Chemistry, Department of Biochemistry, Belgrade, Serbia
| | - D Apostolovic
- Department of Medicine Solna, Immunology and Allergy Unit, Karolinska Institute and University Hospital, Stockholm, Sweden
| | - J Mihailovic
- University of Belgrade - Faculty of Chemistry, Center of Excellence for Molecular Food Sciences, Belgrade, Serbia
| | - M Radibratovic
- Center for Chemistry, Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Belgrade, Serbia
| | - J Radosavljevic
- University of Belgrade - Faculty of Chemistry, Center of Excellence for Molecular Food Sciences, Belgrade, Serbia.,University of Belgrade - Faculty of Chemistry, Department of Biochemistry, Belgrade, Serbia
| | - L Burazer
- Department of Allergy, Institute of Immunology, Virology and Sera Production, Torlak, Belgrade, Serbia
| | - M Milcic
- University of Belgrade - Faculty of Chemistry, Department of Inorganic Chemistry, Belgrade, Serbia.,Ghent University Global Campus, Incheon, Korea
| | - K Smiljanic
- University of Belgrade - Faculty of Chemistry, Center of Excellence for Molecular Food Sciences, Belgrade, Serbia
| | - M van Hage
- Department of Medicine Solna, Immunology and Allergy Unit, Karolinska Institute and University Hospital, Stockholm, Sweden
| | - T Cirkovic Velickovic
- University of Belgrade - Faculty of Chemistry, Center of Excellence for Molecular Food Sciences, Belgrade, Serbia.,University of Belgrade - Faculty of Chemistry, Department of Biochemistry, Belgrade, Serbia.,Ghent University Global Campus, Incheon, Korea.,Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
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37
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Sagnelli D, Chessa S, Mandalari G, Di Martino M, Sorndech W, Mamone G, Vincze E, Buillon G, Nielsen DS, Wiese M, Blennow A, Hebelstrup KH. Low glycaemic index foods from wild barley and amylose-only barley lines. J Funct Foods 2018. [DOI: 10.1016/j.jff.2017.11.028] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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