1
|
Guzmán-López MH, Ruipérez V, Marín-Sanz M, Ojeda-Fernández I, Ojeda-Fernández P, Garrote-Adrados JA, Arranz-Sanz E, Barro F. Identification of RNAi hypoallergic bread wheat lines for wheat-dependent exercise-induced anaphylaxis patients. Front Nutr 2024; 10:1319888. [PMID: 38292700 PMCID: PMC10824911 DOI: 10.3389/fnut.2023.1319888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 12/26/2023] [Indexed: 02/01/2024] Open
Abstract
Wheat-dependent exercise-induced anaphylaxis (WDEIA) is one of the most severe forms of wheat allergy. It occurs in patients when they exercise after ingesting wheat-containing foods. Nowadays, the only possible alternative for WDEIA patients is to avoid such foods. This study investigated the potential of six RNA of interference (RNAi) wheat lines with low-prolamin content as alternatives for WDEIA patients. For that purpose, a high performance-liquid chromatography (HPLC) analysis was performed to evaluate differences in gluten protein fractions among these lines. Next, western blots were conducted to measure the immunoglobulin E (IgE) reactivity to wheat proteins in sera from five WDEIA patients. Additionally, monoclonal antibodies (moAb) recognition sites and the IgE binding sites were searched in all peptides identified by LC-MS/MS after protein digestion. The results showed a 61.4%-81.2% reduction in the gliadin content of the RNAi lines, accompanied by an increase in their high-molecular weight (HMW) glutenin content compared to the wild type bread wheat line (WT). In all cases, the reduction in gliadin content correlated with a decrease in IgE reactivity observed in the sera of WDEIA patients, highlighting the E82 and H320 lines. These two RNAi lines exhibited a ≤90% reduction in IgE reactivity. This reduction could be attributed to an absence of IgE binding sites associated with α- and ω5-gliadins, which were present in the WT. Overall, these lines offer a potential alternative for foodstuff for individuals with WDEIA.
Collapse
Affiliation(s)
- María H. Guzmán-López
- Functional Genomics Laboratory, Plant Breeding Department, Institute for Sustainable Agriculture, Spanish National Research Council (IAS-CSIC), Córdoba, Spain
| | - Violeta Ruipérez
- College of Agricultural Engineering, University of Valladolid, Palencia, Spain
| | - Miriam Marín-Sanz
- Functional Genomics Laboratory, Plant Breeding Department, Institute for Sustainable Agriculture, Spanish National Research Council (IAS-CSIC), Córdoba, Spain
| | | | | | - José Antonio Garrote-Adrados
- Excellence Unit, Institute of Biology and Molecular Genetics, University of Valladolid—Spanish National Research Council (CSIC), Valladolid, Spain
| | - Eduardo Arranz-Sanz
- Excellence Unit, Institute of Biology and Molecular Genetics, University of Valladolid—Spanish National Research Council (CSIC), Valladolid, Spain
| | - Francisco Barro
- Functional Genomics Laboratory, Plant Breeding Department, Institute for Sustainable Agriculture, Spanish National Research Council (IAS-CSIC), Córdoba, Spain
| |
Collapse
|
2
|
Mameri H, Gaudin JC, Lollier V, Tranquet O, Brossard C, Pietri M, Marion D, Codreanu-Morel F, Beaudouin E, Wien F, Gohon Y, Briozzo P, Denery-Papini S. Critical structural elements for the antigenicity of wheat allergen LTP1 (Tri a 14) revealed by site-directed mutagenesis. Sci Rep 2022; 12:12253. [PMID: 35851276 PMCID: PMC9293932 DOI: 10.1038/s41598-022-15811-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 06/29/2022] [Indexed: 11/09/2022] Open
Abstract
Lipid transfer proteins (LTPs) were identified as allergens in a large variety of pollens and foods, including cereals. LTPs belong to the prolamin superfamily and display an α-helical fold, with a bundle of four α-helices held together by four disulfide bonds. Wheat LTP1 is involved in allergic reactions to food. To identify critical structural elements of antibody binding to wheat LTP1, we used site-directed mutagenesis on wheat recombinant LTP1 to target: (i) sequence conservation and/or structure flexibility or (ii) each disulfide bond. We evaluated the modifications induced by these mutations on LTP1 secondary structure by synchrotron radiation circular dichroism and on its antigenicity with patient's sera and with mouse monoclonal antibodies. Disruption of the C28-C73 disulfide bond significantly affected IgE-binding and caused protein denaturation, while removing C13-C27 bond decreased LTP1 antigenicity and slightly modified LTP1 overall folding. In addition, we showed Lys72 to be a key residue; the K72A mutation did not affect global folding but modified the local 3D structure of LTP1 and strongly reduced IgE-binding. This work revealed a cluster of residues (C13, C27, C28, C73 and K72), four of which embedded in disulfide bonds, which play a critical role in LTP1 antigenicity.
Collapse
Affiliation(s)
- Hamza Mameri
- INRAE, UR 1268 Biopolymères Interactions Assemblages (BIA), 44316, Nantes, France. .,UMR 1208 IATE, Univ Montpellier, INRAE, L'Institut-Agro Montpellier, 34060, Montpellier, France.
| | - Jean-Charles Gaudin
- INRAE, UR 1268 Biopolymères Interactions Assemblages (BIA), 44316, Nantes, France.,INRAE, UMR 0588 Biologie intégrée pour la valorisation de la diversité des arbres et de la forêt (BIOFORA), 45075, Orléans, France
| | - Virginie Lollier
- INRAE, UR 1268 Biopolymères Interactions Assemblages (BIA), 44316, Nantes, France.,INRAE, UR BIA, 44316, Nantes, France.,INRAE, PROBE Research Infrastructure, BIBS Facility, 44316, Nantes, France
| | - Olivier Tranquet
- INRAE, UR 1268 Biopolymères Interactions Assemblages (BIA), 44316, Nantes, France.,INRAE UMR 1163 Biodiversité et Biotechnologie Fongiques (BBF), 13288, Marseille, France
| | - Chantal Brossard
- INRAE, UR 1268 Biopolymères Interactions Assemblages (BIA), 44316, Nantes, France
| | - Manon Pietri
- INRAE, UR 1268 Biopolymères Interactions Assemblages (BIA), 44316, Nantes, France.,Institut de Cancérologie de l'Ouest, Centre René Gauducheau, 44805, Saint Herblain Cedex, France
| | - Didier Marion
- INRAE, UR 1268 Biopolymères Interactions Assemblages (BIA), 44316, Nantes, France
| | - Fanny Codreanu-Morel
- CHU Luxembourg, Centre Hospitalier de Luxembourg, Kanner Klinik, 1210, Luxembourg, Luxembourg
| | - Etienne Beaudouin
- Service d'Allergologie, Hôpital de Mercy, CHR Metz, 57000, Metz, France
| | - Frank Wien
- Synchrotron Soleil, Saint-Aubin, 91192, Gif-sur-Yvette, France
| | - Yann Gohon
- INRAE, UMR 1318 Institut Jean-Pierre Bourgin, 78026, Versailles, France
| | - Pierre Briozzo
- INRAE, UMR 1318 Institut Jean-Pierre Bourgin, 78026, Versailles, France
| | - Sandra Denery-Papini
- INRAE, UR 1268 Biopolymères Interactions Assemblages (BIA), 44316, Nantes, France.
| |
Collapse
|
3
|
Gabler AM, Gebhard J, Norwig MC, Eberlein B, Biedermann T, Brockow K, Scherf KA. Basophil Activation to Gluten and Non-Gluten Proteins in Wheat-Dependent Exercise-Induced Anaphylaxis. FRONTIERS IN ALLERGY 2022; 3:822554. [PMID: 35386651 PMCID: PMC8974719 DOI: 10.3389/falgy.2022.822554] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 01/26/2022] [Indexed: 12/04/2022] Open
Abstract
Wheat-dependent exercise-induced anaphylaxis (WDEIA) is a cofactor-induced wheat allergy. Gluten proteins, especially ω5-gliadins, are known as major allergens, but partially hydrolyzed wheat proteins (HWPs) also play a role. Our study investigated the link between the molecular composition of gluten or HWP and allergenicity. Saline extracts of gluten (G), gluten with reduced content of ω5-gliadins (G-ω5), slightly treated HWPs (sHWPs), and extensively treated HWPs (eHWPs) were prepared as allergen test solutions and their allergenicity assessed using the skin prick test and basophil activation test (BAT) on twelve patients with WDEIA and ten controls. Complementary sodium dodecyl-sulfate polyacrylamide gel electrophoresis (SDS-PAGE), high-performance liquid chromatography (HPLC), and mass spectrometry (MS) analyses revealed that non-gluten proteins, mainly α-amylase/trypsin inhibitors (ATIs), were predominant in the allergen test solutions of G, G-ω5, and sHWPs. Only eHWPs contained gliadins and glutenins as major fraction. All allergen test solutions induced significantly higher %CD63+ basophils/anti-FcεRI ratios in patients compared with controls. BAT using sHWPs yielded 100% sensitivity and 83% specificity at optimal cut-off and may be useful as another tool in WDEIA diagnosis. Our findings indicate that non-gluten proteins carrying yet unidentified allergenic epitopes appear to be relevant in WDEIA. Further research is needed to clarify the role of nutritional ATIs in WDEIA and identify specific mechanisms of immune activation.
Collapse
Affiliation(s)
- Angelika Miriam Gabler
- Leibniz-Institute for Food Systems Biology at the Technical University of Munich, Freising, Germany
| | - Julia Gebhard
- Department of Dermatology and Allergy Biederstein, TUM School of Medicine, Technical University of Munich (TUM), Munich, Germany
| | - Marie-Christin Norwig
- Leibniz-Institute for Food Systems Biology at the Technical University of Munich, Freising, Germany
| | - Bernadette Eberlein
- Department of Dermatology and Allergy Biederstein, TUM School of Medicine, Technical University of Munich (TUM), Munich, Germany
| | - Tilo Biedermann
- Department of Dermatology and Allergy Biederstein, TUM School of Medicine, Technical University of Munich (TUM), Munich, Germany
| | - Knut Brockow
- Department of Dermatology and Allergy Biederstein, TUM School of Medicine, Technical University of Munich (TUM), Munich, Germany
| | - Katharina Anne Scherf
- Leibniz-Institute for Food Systems Biology at the Technical University of Munich, Freising, Germany
- Department of Bioactive and Functional Food Chemistry, Institute of Applied Biosciences, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
- *Correspondence: Katharina Anne Scherf
| |
Collapse
|
4
|
Immunological Analytical Techniques for Cosmetics Quality Control and Process Monitoring. Processes (Basel) 2021. [DOI: 10.3390/pr9111982] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Cosmetics analysis represents a rapidly expanding field of analytical chemistry as new cosmetic formulations are increasingly in demand on the market and the ingredients required for their production are constantly evolving. Each country applies strict legislation regarding substances in the final product that must be prohibited or regulated. To verify the compliance of cosmetics with current regulations, official analytical methods are available to reveal and quantitatively determine the analytes of interest. However, since ingredients, and the lists of regulated/prohibited substances, rapidly change, dedicated analytical methods must be developed ad hoc to fulfill the new requirements. Research focuses on finding innovative techniques that allow a rapid, inexpensive, and sensitive detection of the target analytes in cosmetics. Among the different methods proposed, immunological techniques are gaining interest, as they make it possible to carry out low-cost analyses on raw materials and finished products in a relatively short time. Indeed, immunoassays are based on the specific and selective antibody/antigen reaction, and they have been extensively applied for clinical diagnostic, alimentary quality control and environmental security purposes, and even for routine analysis. Since the complexity and variability of the matrices, as well as the great variety of compounds present in cosmetics, are analogous with those from food sources, immunological methods could also be applied successfully in this field. Indeed, this would provide a valid approach for the monitoring of industrial production chains even in developing countries, which are currently the greatest producers of cosmetics and the major exporters of raw materials. This review aims to highlight the immunological techniques proposed for cosmetics analysis, focusing on the detection of prohibited/regulated compounds, bacteria and toxins, and allergenic substances, and the identification of counterfeits.
Collapse
|
5
|
Wang Y, Weng J, Zhu C, Ai R, Zhou J, Wang C, Chen Q, Fu L. Allergenicity assessment and allergen profile analysis of different Chinese wheat cultivars. World Allergy Organ J 2021; 14:100559. [PMID: 34257797 PMCID: PMC8258687 DOI: 10.1016/j.waojou.2021.100559] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 05/07/2021] [Accepted: 05/27/2021] [Indexed: 11/17/2022] Open
Abstract
Backgrounds As one of the most important cereals, wheat (Triticum aestivum) can cause severe allergic reactions, such as baker's asthma, allergic rhinitis, and atopic dermatitis. A growing number of people are developing allergies to Chinese wheat; however, only a few wheat cultivars have been screened on allergenicity in China. Objective The aim of the present study was to assess the allergenicity of different Chinese wheat cultivars and characterize wheat allergen profiles of patients with allergic rhinitis. Methods We determined protein (soluble protein, gliadin, and glutenin) composition in Chinese wheat by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), and the immunoglobulin E (IgE) binding capacity by enzyme-linked immunosorbent assay (ELISA) and Western blot using 10 positive sera from wheat allergy patients. We identified 5 gel bands with significant IgE binding capacity using liquid chromatography-tandem mass spectrometry (LC-MS/MS). Results Soluble protein, albumin, and globulin, showed the highest allergenicity, followed by gliadin, while glutenin only had slight allergenicity. In soluble protein, 5 protein bands with molecular weights of 27, 28, 53, 58, and 62 kDa showed very significant allergenicity. Meanwhile, the relative abundances of 28 kDa-protein and 58 kDa-protein were significantly positively correlated with the IgE-binding capacity of Chinese wheat cultivars, which were identified as rRNA N-glycosidase and β-amylase, respectively, among other proteins in those highly complex gel bands. Conclusion and clinical relevance 28 kDa-protein (rRNA N-glycosidase) and 58 kDa-protein (β-amylase) were speculated to be the main allergens of Chinese wheat causing baker's asthma and allergic rhinitis. These results provide new insights into the prevention and treatment of wheat allergy and the development of hypoallergenic wheat products, whose clinical significance is worth further evaluation.
Collapse
Affiliation(s)
- Yanbo Wang
- Food Safety Key Laboratory of Zhejiang Province, School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018, PR China
| | - Junjie Weng
- Food Safety Key Laboratory of Zhejiang Province, School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018, PR China
| | - Chengbo Zhu
- Food Safety Key Laboratory of Zhejiang Province, School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018, PR China
| | - Rong Ai
- Food Safety Key Laboratory of Zhejiang Province, School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018, PR China
| | - Jinru Zhou
- Food Safety Key Laboratory of Zhejiang Province, School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018, PR China
| | - Chong Wang
- Food Safety Key Laboratory of Zhejiang Province, School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018, PR China
| | - Qing Chen
- Food Safety Key Laboratory of Zhejiang Province, School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018, PR China
| | - Linglin Fu
- Food Safety Key Laboratory of Zhejiang Province, School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018, PR China
| |
Collapse
|
6
|
Reduction of Allergenic Potential in Bread Wheat RNAi Transgenic Lines Silenced for CM3, CM16 and 0.28 ATI Genes. Int J Mol Sci 2020; 21:ijms21165817. [PMID: 32823634 PMCID: PMC7461106 DOI: 10.3390/ijms21165817] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 08/08/2020] [Accepted: 08/11/2020] [Indexed: 02/06/2023] Open
Abstract
Although wheat is used worldwide as a staple food, it can give rise to adverse reactions, for which the triggering factors have not been identified yet. These reactions can be caused mainly by kernel proteins, both gluten and non-gluten proteins. Among these latter proteins, α-amylase/trypsin inhibitors (ATI) are involved in baker’s asthma and realistically in Non Celiac Wheat Sensitivity (NCWS). In this paper, we report characterization of three transgenic lines obtained from the bread wheat cultivar Bobwhite silenced by RNAi in the three ATI genes CM3, CM16 and 0.28. We have obtained transgenic lines showing an effective decrease in the activity of target genes that, although showing a higher trypsin inhibition as a pleiotropic effect, generate a lower reaction when tested with sera of patients allergic to wheat, accounting for the important role of the three target proteins in wheat allergies. Finally, these lines show unintended differences in high molecular weight glutenin subunits (HMW-GS) accumulation, involved in technological performances, but do not show differences in terms of yield. The development of new genotypes accumulating a lower amount of proteins potentially or effectively involved in allergies to wheat and NCWS, not only offers the possibility to use them as a basis for the production of varieties with a lower impact on adverse reaction, but also to test if these proteins are actually implicated in those pathologies for which the triggering factor has not been established yet.
Collapse
|
7
|
Altenbach SB, Chang HC, Simon-Buss A. Deciphering the immunogenic potential of wheat flour: a reference map of the salt-soluble proteome from the U.S. wheat Butte 86. Proteome Sci 2020; 18:8. [PMID: 32774173 PMCID: PMC7395986 DOI: 10.1186/s12953-020-00164-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 07/21/2020] [Indexed: 01/11/2023] Open
Abstract
Background Within the complex wheat flour proteome, the gluten proteins have attracted most of the attention because of their importance in determining the functional properties of wheat flour doughs and their roles in human health conditions such as celiac disease and food allergies. However, certain non-gluten proteins also trigger immunological responses but may be present in flour in low amounts or obscured by the more abundant gluten proteins in two-dimensional gels of total protein preparations. Methods Non-gluten proteins were preferentially extracted from the flour with a dilute salt solution and separated by two-dimensional gel electrophoresis. Proteins in 173 gel spots were identified by tandem mass spectrometry after cleavage with trypsin or chymotrypsin. Transgenic wheat lines in which specific groups of gluten proteins were suppressed by RNA interference were used to estimate the amount of carry-over of gluten proteins in the salt-soluble protein fraction. Results Fifty-seven different types of non-gluten proteins were identified, including 14 types that are known or suspected immunogenic proteins. The predominant proteins in 18 gel spots were gluten proteins. Some of these also contained non-gluten proteins. Analysis of the salt-soluble proteins from a transgenic line in which omega-1,2 gliadins were eliminated by RNA interference indicated that certain omega-1,2 gliadins were present in large amounts in the salt-soluble fraction and obscured relatively small amounts of beta-amylase and protein disulfide isomerase. In comparison, analysis of a transgenic line in which alpha gliadins were absent revealed that glyceraldehyde-3 phosphate dehydrogenase was a moderately abundant protein that co-migrated with several alpha gliadins. Conclusions In this study, we constructed a proteomic map of the non-gluten protein fraction of wheat flour from the US wheat Butte 86 that complements a proteomic map of the total flour proteins developed previously for the same cultivar. Knowing the identities of low abundance proteins in the flour as well as proteins that are hidden by some of the major gluten proteins on two-dimensional gels is critical for studies aimed at assessing the immunogenic potential of wheat flour and determining which wheat proteins that should be targeted in future gene editing experiments to reduce the immunogenic potential of wheat flour.
Collapse
Affiliation(s)
- Susan B Altenbach
- Western Regional Research Center, United States Department of Agriculture-Agricultural Research Service, Albany, CA USA
| | - Han-Chang Chang
- Western Regional Research Center, United States Department of Agriculture-Agricultural Research Service, Albany, CA USA
| | - Annamaria Simon-Buss
- Western Regional Research Center, United States Department of Agriculture-Agricultural Research Service, Albany, CA USA.,Hamburg School of Food Science, Institute of Food Chemistry, University of Hamburg, Hamburg, Germany
| |
Collapse
|
8
|
Jang YR, Cho K, Kim S, Sim JR, Lee SB, Kim BG, Gu YQ, Altenbach SB, Lim SH, Goo TW, Lee JY. Comparison of MALDI-TOF-MS and RP-HPLC as Rapid Screening Methods for Wheat Lines With Altered Gliadin Compositions. FRONTIERS IN PLANT SCIENCE 2020; 11:600489. [PMID: 33343602 PMCID: PMC7746642 DOI: 10.3389/fpls.2020.600489] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Accepted: 11/13/2020] [Indexed: 05/05/2023]
Abstract
The wheat gliadins are a complex group of flour proteins that can trigger celiac disease and serious food allergies. As a result, mutation breeding and biotechnology approaches are being used to develop new wheat lines with reduced immunogenic potential. Key to these efforts is the development of rapid, high-throughput methods that can be used as a first step in selecting lines with altered gliadin contents. In this paper, we optimized matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) and reversed-phase high-performance liquid chromatography (RP-HPLC) methods for the separation of gliadins from Triticum aestivum cv. Chinese Spring (CS). We evaluated the quality of the resulting profiles using the complete set of gliadin gene sequences recently obtained from this cultivar as well as a set of aneuploid lines in CS. The gliadins were resolved into 13 peaks by MALDI-TOF-MS. α- or γ-gliadins that contain abundant celiac disease epitopes and are likely targets for efforts to reduce the immunogenicity of flour were found in several peaks. However, other peaks contained multiple α- and γ-gliadins, including one peak with as many as 12 different gliadins. In comparison, separation of proteins by RP-HPLC yielded 28 gliadin peaks, including 13 peaks containing α-gliadins and eight peaks containing γ-gliadins. While the separation of α- and γ-gliadins gliadins achieved by RP-HPLC was better than that achieved by MALDI-TOF-MS, it was not possible to link peaks with individual protein sequences. Both MALDI-TOF-MS and RP-HPLC provided adequate separation of ω-gliadins. While MALDI-TOF-MS is faster and could prove useful in studies that target specific gliadins, RP-HPLC is an effective method that can be applied more broadly to detect changes in gliadin composition.
Collapse
Affiliation(s)
- You-Ran Jang
- National Institute of Agricultural Sciences, RDA, Jeonju, South Korea
| | - Kyoungwon Cho
- Department of Biotechnology, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, South Korea
| | - Sewon Kim
- National Institute of Agricultural Sciences, RDA, Jeonju, South Korea
| | - Jae-Ryeong Sim
- National Institute of Agricultural Sciences, RDA, Jeonju, South Korea
| | - Su-Bin Lee
- National Institute of Agricultural Sciences, RDA, Jeonju, South Korea
| | - Beom-Gi Kim
- National Institute of Agricultural Sciences, RDA, Jeonju, South Korea
| | - Yong Q. Gu
- USDA-ARS, Western Regional Research Center, Albany, CA, United States
| | | | - Sun-Hyung Lim
- Division of Horticultural Biotechnology, Hankyong National University, Anseong, South Korea
| | - Tae-Won Goo
- Department of Biochemistry, School of Medicine, Dongguk University, Gyeongju, South Korea
| | - Jong-Yeol Lee
- National Institute of Agricultural Sciences, RDA, Jeonju, South Korea
- *Correspondence: Jong-Yeol Lee,
| |
Collapse
|
9
|
Wheat-dependent exercise-induced anaphylaxis: Are you sure about the diagnosis? THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY-IN PRACTICE 2019; 6:1434. [PMID: 30033924 DOI: 10.1016/j.jaip.2018.04.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2018] [Revised: 04/18/2018] [Accepted: 04/20/2018] [Indexed: 01/05/2023]
|
10
|
Altenbach SB, Chang HC, Yu XB, Seabourn BW, Green PH, Alaedini A. Elimination of Omega-1,2 Gliadins From Bread Wheat ( Triticum aestivum) Flour: Effects on Immunogenic Potential and End-Use Quality. FRONTIERS IN PLANT SCIENCE 2019; 10:580. [PMID: 31143195 PMCID: PMC6521778 DOI: 10.3389/fpls.2019.00580] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 04/18/2019] [Indexed: 05/19/2023]
Abstract
The omega-1,2 gliadins are a group of wheat gluten proteins that contain immunodominant epitopes for celiac disease (CD) and also have been associated with food allergies. To reduce the levels of these proteins in the flour, bread wheat (Triticum aestivum cv. Butte 86) was genetically transformed with an RNA interference plasmid that targeted a 141 bp region at the 5' end of an omega-1,2 gliadin gene. Flour proteins from two transgenic lines were analyzed in detail by quantitative two-dimensional gel electrophoresis and tandem mass spectrometry. In one line, the omega-1,2 gliadins were missing with few other changes in the proteome. In the other line, striking changes in the proteome were observed and nearly all gliadins and low molecular weight glutenin subunits (LMW-GS) were absent. High molecular weight glutenin subunits (HMW-GS) increased in this line and those that showed the largest increases had molecular weights slightly less than those in the non-transgenic, possibly due to post-translational processing. In addition, there were increases in non-gluten proteins such as triticins, purinins, globulins, serpins, and alpha-amylase/protease inhibitors. Reactivity of flour proteins with serum IgG and IgA antibodies from a cohort of CD patients was reduced significantly in both transgenic lines. Both mixing time and tolerance were improved in the line without omega-1,2 gliadins while mixing properties were diminished in the line missing most gluten proteins. The data suggest that biotechnology approaches may be used to create wheat lines with reduced immunogenic potential in the context of gluten sensitivity without compromising end-use quality.
Collapse
Affiliation(s)
- Susan B. Altenbach
- Western Regional Research Center, United States Department of Agriculture-Agricultural Research Service, Albany, CA, United States
| | - Han-Chang Chang
- Western Regional Research Center, United States Department of Agriculture-Agricultural Research Service, Albany, CA, United States
| | - Xuechen B. Yu
- Department of Medicine, Columbia University, New York, NY, United States
- Institute of Human Nutrition, Columbia University, New York, NY, United States
| | - Bradford W. Seabourn
- Hard Winter Wheat Quality Laboratory, Center for Grain and Animal Health Research, United States Department of Agriculture-Agricultural Research Service, Manhattan, KS, United States
| | - Peter H. Green
- Institute of Human Nutrition, Columbia University, New York, NY, United States
- Celiac Disease Center, Columbia University, New York, NY, United States
| | - Armin Alaedini
- Department of Medicine, Columbia University, New York, NY, United States
- Institute of Human Nutrition, Columbia University, New York, NY, United States
- Celiac Disease Center, Columbia University, New York, NY, United States
- Department of Medicine, New York Medical College, Valhalla, NY, United States
| |
Collapse
|
11
|
Tranquet O, Larré C, Denery-Papini S. Allergic reactions to hydrolysed wheat proteins: clinical aspects and molecular structures of the allergens involved. Crit Rev Food Sci Nutr 2018; 60:147-156. [PMID: 30463417 DOI: 10.1080/10408398.2018.1516622] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Wheat gluten can be chemically or enzymatically hydrolysed to produce functional ingredients useful in food and cosmetics. However severe allergies to hydrolysed wheat proteins (HWP) have been described in Europe and Japan since the early 2000's. Triggering proteins and IgE epitopes were described both for French and Japanese cohorts and appeared remarkably similar leading to define a new wheat allergic entity. Deamidation induced by functionalisation generate neo-allergens responsible for this particular allergy. This article aims to review the processes leading to deamidation and the clinical features of the patients suffering from this allergy. Then the molecular determinants involved in HWP-allergy were exhaustively described and hypothesis regarding the sensitizing mechanism of HWP-allergy are discussed. Finally, current regulation and tools aiming at managing this risk associated with HWP are presented.
Collapse
Affiliation(s)
- Olivier Tranquet
- UR1268 BIA - INRA (Institut National De La Recherche Agronomique), Nantes, France
| | - Colette Larré
- UR1268 BIA - INRA (Institut National De La Recherche Agronomique), Nantes, France
| | - Sandra Denery-Papini
- UR1268 BIA - INRA (Institut National De La Recherche Agronomique), Nantes, France
| |
Collapse
|
12
|
Altenbach SB, Chang HC, Simon-Buss A, Jang YR, Denery-Papini S, Pineau F, Gu YQ, Huo N, Lim SH, Kang CS, Lee JY. Towards reducing the immunogenic potential of wheat flour: omega gliadins encoded by the D genome of hexaploid wheat may also harbor epitopes for the serious food allergy WDEIA. BMC PLANT BIOLOGY 2018; 18:291. [PMID: 30463509 PMCID: PMC6249860 DOI: 10.1186/s12870-018-1506-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 10/26/2018] [Indexed: 05/22/2023]
Abstract
BACKGROUND Omega-5 gliadins are a group of highly repetitive gluten proteins in wheat flour encoded on the 1B chromosome of hexaploid wheat. These proteins are the major sensitizing allergens in a severe form of food allergy called wheat-dependent exercise-induced anaphylaxis (WDEIA). The elimination of omega-5 gliadins from wheat flour through biotechnology or breeding approaches could reduce the immunogenic potential and adverse health effects of the flour. RESULTS A mutant line missing low-molecular weight glutenin subunits encoded at the Glu-B3 locus was selected previously from a doubled haploid population generated from two Korean wheat cultivars. Analysis of flour from the mutant line by 2-dimensional gel electrophoresis coupled with tandem mass spectrometry revealed that the omega-5 gliadins and several gamma gliadins encoded by the closely linked Gli-B1 locus were also missing as a result of a deletion of at least 5.8 Mb of chromosome 1B. Two-dimensional immunoblot analysis of flour proteins using sera from WDEIA patients showed reduced IgE reactivity in the mutant relative to the parental lines due to the absence of the major omega-5 gliadins. However, two minor proteins showed strong reactivity to patient sera in both the parental and the mutant lines and also reacted with a monoclonal antibody against omega-5 gliadin. Analysis of the two minor reactive proteins by mass spectrometry revealed that both proteins correspond to omega-5 gliadin genes encoded on chromosome 1D that were thought previously to be pseudogenes. CONCLUSIONS While breeding approaches can be used to reduce the levels of the highly immunogenic omega-5 gliadins in wheat flour, these approaches are complicated by the genetic linkage of different classes of gluten protein genes and the finding that omega-5 gliadins may be encoded on more than one chromosome. The work illustrates the importance of detailed knowledge about the genomic regions harboring the major gluten protein genes in individual wheat cultivars for future efforts aimed at reducing the immunogenic potential of wheat flour.
Collapse
Affiliation(s)
- Susan B. Altenbach
- USDA-ARS Western Regional Research Center, 800 Buchanan Street, Albany, CA 94710 USA
| | - Han-Chang Chang
- USDA-ARS Western Regional Research Center, 800 Buchanan Street, Albany, CA 94710 USA
| | - Annamaria Simon-Buss
- USDA-ARS Western Regional Research Center, 800 Buchanan Street, Albany, CA 94710 USA
| | - You-Ran Jang
- National Institute of Agricultural Sciences, RDA, Jeonju, 54874 South Korea
| | - Sandra Denery-Papini
- UR1268 Biopolymers, Interactions, Assemblies, Institut National de la Recherche Agronomique, Rue de la Géraudière, F-44316 Nantes, France
| | - Florence Pineau
- UR1268 Biopolymers, Interactions, Assemblies, Institut National de la Recherche Agronomique, Rue de la Géraudière, F-44316 Nantes, France
| | - Yong Q. Gu
- USDA-ARS Western Regional Research Center, 800 Buchanan Street, Albany, CA 94710 USA
| | - Naxin Huo
- USDA-ARS Western Regional Research Center, 800 Buchanan Street, Albany, CA 94710 USA
| | - Sun-Hyung Lim
- National Institute of Agricultural Sciences, RDA, Jeonju, 54874 South Korea
| | - Chon-Sik Kang
- National Institute of Crop Science, RDA, Jeonju, 55365 South Korea
| | - Jong-Yeol Lee
- National Institute of Agricultural Sciences, RDA, Jeonju, 54874 South Korea
| |
Collapse
|
13
|
Ansari IT, Mu T. A murine model of wheat versus potato allergy: Patatin and 53kDa protein are the potential allergen from potato. Mol Immunol 2018; 101:284-293. [DOI: 10.1016/j.molimm.2018.07.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Revised: 04/17/2018] [Accepted: 07/07/2018] [Indexed: 11/28/2022]
|
14
|
Mohan Kumar BV, Prasada Rao UJS, Prabhasankar P. Immunogenicity characterization of hexaploid and tetraploid wheat varieties related to celiac disease and wheat allergy. FOOD AGR IMMUNOL 2017. [DOI: 10.1080/09540105.2017.1319342] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Affiliation(s)
- B. V. Mohan Kumar
- Flour Milling Baking and Confectionery Technology Department, CSIR-Central Food Technological Research Institute, Mysore, India
- Academy of Scientific & Innovative Research (AcSIR), CSIR-Central Food Technological Research Institute, Mysore, India
| | - U. J. S. Prasada Rao
- Department Biochemistry, CSIR-Central Food Technological Research Institute, Mysore, India
| | - P. Prabhasankar
- Flour Milling Baking and Confectionery Technology Department, CSIR-Central Food Technological Research Institute, Mysore, India
- Academy of Scientific & Innovative Research (AcSIR), CSIR-Central Food Technological Research Institute, Mysore, India
| |
Collapse
|
15
|
Brzozowski B, Stasiewicz K. Effects of water stress on the composition and immunoreactive properties of gliadins from two wheat cultivars: Nawra and Tonacja. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2017; 97:1134-1142. [PMID: 27283224 DOI: 10.1002/jsfa.7839] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 05/18/2016] [Accepted: 06/01/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND Water shortage during wheat vegetation causes changes in the composition of gliadins in grains, which can lead to changes in their immunoreactive properties. RESULTS The investigated wheat cultivars exposed to water stress accumulated significantly lower amounts (P < 0.05) of gliadins and glutenins in grains. The composition of proteins accumulated in grains was also modified. Water shortage results in a decreased share of αβ and γ fractions in total gliadins. Grains of wheat cultivated under water stress contain significantly higher (P < 0.05) levels of ω-gliadins by 4.5% and 43.3% for Nawra and Tonacja cultivars, respectively. Water stress promotes an increase in the share of P and Q/E residues in gliadins. In protein samples R5 antibodies recognized increased amounts of gliadins matching the QQPFP sequence. Wheat proteins also reacted with IgE antibodies isolated from subjects allergic to gluten. CONCLUSION Cultivation of wheat under conditions of water stress results in the qualitative and quantitative changes of gliadins by increasing their immunoreactivity. © 2016 Society of Chemical Industry.
Collapse
Affiliation(s)
- Bartosz Brzozowski
- Department of Food Biotechnology, University of Warmia and Mazury, 10-718 Olsztyn, Poland
| | - Katarzyna Stasiewicz
- Department of Food Biotechnology, University of Warmia and Mazury, 10-718 Olsztyn, Poland
| |
Collapse
|
16
|
Mattioni B, Scheuer PM, Antunes AL, Paulino N, de Francisco A. Compliance with Gluten-Free Labelling Regulation in the Brazilian Food Industry. Cereal Chem 2016. [DOI: 10.1094/cchem-08-15-0158-r] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Bruna Mattioni
- Laboratory of Cereals, Food Science and Technology Department, Federal University of Santa Catarina. Av. Admar Gonzaga, 1346, Itacorubi 88034-001, Florianópolis, SC, Brazil
| | - Patricia M. Scheuer
- Laboratory of Cereals, Food Science and Technology Department, Federal University of Santa Catarina. Av. Admar Gonzaga, 1346, Itacorubi 88034-001, Florianópolis, SC, Brazil
| | - Andre L. Antunes
- Laboratory of Cereals, Food Science and Technology Department, Federal University of Santa Catarina. Av. Admar Gonzaga, 1346, Itacorubi 88034-001, Florianópolis, SC, Brazil
| | - Niraldo Paulino
- Group of Research and Development of Biopharmaceuticals, Pharmacy Professional Master’s Program, University of Anhanguera of São Paulo, Rua Maria Cândida, 1813, Vila Guilherme 02071-013, São Paulo, SP, Brazil
| | - Alicia de Francisco
- Laboratory of Cereals, Food Science and Technology Department, Federal University of Santa Catarina. Av. Admar Gonzaga, 1346, Itacorubi 88034-001, Florianópolis, SC, Brazil
| |
Collapse
|
17
|
Sievers S, Rawel HM, Ringel KP, Niggemann B, Beyer K. Wheat protein recognition pattern in tolerant and allergic children. Pediatr Allergy Immunol 2016; 27:147-55. [PMID: 26498269 DOI: 10.1111/pai.12502] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/20/2015] [Indexed: 01/17/2023]
Abstract
BACKGROUND Wheat is one of the most common food allergens in early childhood. In contrast to other food allergies, wheat-specific IgE correlates badly with clinical symptoms and relevant components have been identified mostly for wheat-depended exercise-induced anaphylaxis. Moreover, a high percentage of patients present with immediate type symptoms but wheat-specific IgE cannot be detected with commercial available systems. OBJECTIVE We addressed the question whether the IgE recognition pattern between wheat allergic (WA) and clinically tolerant (WT) children differs in order to identify individual proteins useful for component-resolved diagnostics. METHODS Sera of 106 children with suspected wheat allergy, of whom 44 children had clinical relevant wheat allergy and 62 were tolerant upon oral food challenge, were analyzed for wheat-specific IgE using the ImmunoCap system as well as immunoblots against water and salt soluble, and water-insoluble protein fractions. 40 randomly selected sera were analyzed for specific IgE to ω5-gliadin. RESULTS Sixty-three percent of the WT and 86% of the WA children were sensitized to wheat with >0.35 kUA /l in ImmunoCAP analysis. We could confirm the role of α-, ß-, γ-, and ω-gliadins, and LMW glutenin subunits as major allergens and found also IgE binding to a broad spectrum of water- and salt-soluble protein bands. It is of great importance that wheat allergic and tolerant patients showed IgE binding to the same protein bands. WT and WA did not significantly differ in levels of ω5-gliadin-specific IgE. CONCLUSIONS & CLINICAL RELEVANCE Children with challenge proven clinical relevant food allergy and tolerant ones had a similar spectrum of IgE binding to the same protein bands. These findings imply that component-resolved diagnostics might not be helpful in the diagnostic work-up of wheat allergy.
Collapse
Affiliation(s)
- Steven Sievers
- Pediatric Pneumology and Immunology, Charité Universitätsmedizin, Berlin, Germany.,Department of Biology, Chemistry and Pharmacy, Free University, Berlin, Germany
| | | | | | - Bodo Niggemann
- Pediatric Pneumology and Immunology, Charité Universitätsmedizin, Berlin, Germany
| | - Kirsten Beyer
- Pediatric Pneumology and Immunology, Charité Universitätsmedizin, Berlin, Germany.,Icahn School of Medicine at Mount Sinai, New York, NY, USA
| |
Collapse
|
18
|
Chung SJ, Shim J, Kim HJ, Sohn KH, Kang SY, Kang MG, Park HK, Kang HR. Analysis of clinical characteristics of food-dependent exercise-induced anaphylaxis at a single tertiary hospital. ALLERGY ASTHMA & RESPIRATORY DISEASE 2016. [DOI: 10.4168/aard.2016.4.6.436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Soo Jie Chung
- Department of Internal Medicine, Seoul National University Medical Research Center, Seoul National University College of Medicine, Seoul, Korea
- Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul National University College of Medicine, Seoul, Korea
| | - Jisu Shim
- Department of Internal Medicine, Seoul National University Medical Research Center, Seoul National University College of Medicine, Seoul, Korea
- Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul National University College of Medicine, Seoul, Korea
| | - Hyung-Jun Kim
- Department of Internal Medicine, Seoul National University Medical Research Center, Seoul National University College of Medicine, Seoul, Korea
| | - Kyoung-Hee Sohn
- Department of Internal Medicine, Seoul National University Medical Research Center, Seoul National University College of Medicine, Seoul, Korea
- Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul National University College of Medicine, Seoul, Korea
| | - Sung-Yoon Kang
- Department of Internal Medicine, Seoul National University Medical Research Center, Seoul National University College of Medicine, Seoul, Korea
- Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul National University College of Medicine, Seoul, Korea
| | - Min-Gyu Kang
- Department of Internal Medicine, Chungbuk National University College of Medicine, Cheongju, Korea
| | - Han-Ki Park
- Department of Internal Medicine, Seoul National University Medical Research Center, Seoul National University College of Medicine, Seoul, Korea
- Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul National University College of Medicine, Seoul, Korea
| | - Hye-Ryun Kang
- Department of Internal Medicine, Seoul National University Medical Research Center, Seoul National University College of Medicine, Seoul, Korea
- Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul National University College of Medicine, Seoul, Korea
| |
Collapse
|
19
|
Altenbach SB, Tanaka CK, Pineau F, Lupi R, Drouet M, Beaudouin E, Morisset M, Denery-Papini S. Assessment of the Allergenic Potential of Transgenic Wheat (Triticum aestivum) with Reduced Levels of ω5-Gliadins, the Major Sensitizing Allergen in Wheat-Dependent Exercise-Induced Anaphylaxis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:9323-32. [PMID: 26447559 DOI: 10.1021/acs.jafc.5b03557] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The ω5-gliadins are the major sensitizing allergens in wheat-dependent exercise-induced anaphylaxis (WDEIA). In this study, two-dimensional immunoblot analysis was used to assess the allergenic potential of two transgenic wheat lines in which ω5-gliadin genes were silenced by RNA interference. Sera from 7 of 11 WDEIA patients showed greatly reduced levels of immunoglobulin E (IgE) reactivity to ω5-gliadins in both transgenic lines. However, these sera also showed low levels of reactivity to other gluten proteins. Sera from three patients showed the greatest reactivity to proteins other than ω5-gliadins, either high-molecular-weight glutenin subunits (HMW-GSs), α-gliadins, or non-gluten proteins. The complexity of immunological responses among these patients suggests that flour from the transgenic lines would not be suitable for individuals already diagnosed with WDEIA. However, the introduction of wheat lacking ω5-gliadins could reduce the number of people sensitized to these proteins and thereby decrease the overall incidence of this serious food allergy.
Collapse
Affiliation(s)
- Susan B Altenbach
- Western Regional Research Center, Agricultural Research Services (ARS), United States Department of Agriculture (USDA) , 800 Buchanan Street Albany, California 94710, United States
| | - Charlene K Tanaka
- Western Regional Research Center, Agricultural Research Services (ARS), United States Department of Agriculture (USDA) , 800 Buchanan Street Albany, California 94710, United States
| | - Florence Pineau
- UR1268 Biopolymers, Interactions, Assemblies, Institut National de la Recherche Agronomique (INRA) , Rue de la Géraudière, F-44316 Nantes Cedex 03, France
| | - Roberta Lupi
- UR1268 Biopolymers, Interactions, Assemblies, Institut National de la Recherche Agronomique (INRA) , Rue de la Géraudière, F-44316 Nantes Cedex 03, France
| | - Martine Drouet
- Unité d'Allergologie Générale et de Pneumologie, Centre Hospitalier Universitaire (CHU) d'Angers , F-49933 Angers, France
| | - Etienne Beaudouin
- Service d'Allergologie, Centre Hospitalier (CH) Epinal , F-88021 Epinal, France
| | - Martine Morisset
- Immunologie-Allergologie, Centre Hospitalier (CH) de Luxembourg , L-1210 Luxembourg, Luxembourg
| | - Sandra Denery-Papini
- UR1268 Biopolymers, Interactions, Assemblies, Institut National de la Recherche Agronomique (INRA) , Rue de la Géraudière, F-44316 Nantes Cedex 03, France
| |
Collapse
|
20
|
Mameri H, Brossard C, Gaudin JC, Gohon Y, Paty E, Beaudouin E, Moneret-Vautrin DA, Drouet M, Solé V, Wien F, Lupi R, Larré C, Snégaroff J, Denery-Papini S. Structural Basis of IgE Binding to α- and γ-Gliadins: Contribution of Disulfide Bonds and Repetitive and Nonrepetitive Domains. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:6546-6554. [PMID: 26186140 DOI: 10.1021/acs.jafc.5b01922] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Wheat products cause IgE-mediated allergies. The present study aimed to decipher the molecular basis of α- and γ-gliadin allergenicity. Gliadins and their domains, the repetitive N-terminal and the nonrepetitive C-terminal domains, were cloned and expressed in Escherichia coli. Their secondary structures and their IgE binding capacity were compared with those of natural proteins before and after reduction/alkylation. Allergenicity was evaluated with sera from patients who had a wheat food allergy or baker's asthma. The secondary structures of natural and recombinant proteins were slightly different. Compared with natural gliadins, recombinant proteins retained IgE binding but with reduced reactivity. Reduction/alkylation decreased IgE binding for both natural and recombinant gliadins. Although more continuous epitopes were identified in the N-terminal domains of α- and γ-gliadins, both the N-terminal and C-terminal domains contributed to IgE binding. As for other members of the prolamin superfamily, disulfide bonds appear to be of high importance for IgE binding.
Collapse
Affiliation(s)
- Hamza Mameri
- †INRA, UR1268 BIA (Biopolymers, Interactions, Assemblies), F-44316 Nantes, France
- ‡INRA, UMR1318, Institut Jean-Pierre Bourgin, INRA-AgroParisTech, F-78026 Versailles, France
| | - Chantal Brossard
- †INRA, UR1268 BIA (Biopolymers, Interactions, Assemblies), F-44316 Nantes, France
| | - Jean-Charles Gaudin
- †INRA, UR1268 BIA (Biopolymers, Interactions, Assemblies), F-44316 Nantes, France
| | - Yann Gohon
- ‡INRA, UMR1318, Institut Jean-Pierre Bourgin, INRA-AgroParisTech, F-78026 Versailles, France
| | - Evelyne Paty
- §Service de Pneumologie et d'Allergologie Pédiatrique, Groupe hospitalier Necker, F-75015 Paris, France
| | | | | | - Martine Drouet
- ⊥Unité d'Allergologie Générale et de Pneumologie, CHU d'Angers, F-49933 Angers, France
| | - Véronique Solé
- †INRA, UR1268 BIA (Biopolymers, Interactions, Assemblies), F-44316 Nantes, France
| | - Frank Wien
- #Synchrotron Soleil, Saint-Aubin, F-91192 Gif-sur-Yvette, France
| | - Roberta Lupi
- †INRA, UR1268 BIA (Biopolymers, Interactions, Assemblies), F-44316 Nantes, France
| | - Colette Larré
- †INRA, UR1268 BIA (Biopolymers, Interactions, Assemblies), F-44316 Nantes, France
| | - Jacques Snégaroff
- ‡INRA, UMR1318, Institut Jean-Pierre Bourgin, INRA-AgroParisTech, F-78026 Versailles, France
| | - Sandra Denery-Papini
- †INRA, UR1268 BIA (Biopolymers, Interactions, Assemblies), F-44316 Nantes, France
| |
Collapse
|
21
|
Tranquet O, Lupi R, Echasserieau-Laporte V, Pietri M, Larré C, Denery-Papini S. Characterization of Antibodies and Development of an Indirect Competitive Immunoassay for Detection of Deamidated Gluten. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:5403-5409. [PMID: 25980542 DOI: 10.1021/acs.jafc.5b00923] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Diversification of gluten applications in the food and cosmetics industries was achieved through the production of water-soluble gluten that can be obtained by deamidation. Current analytical methods dedicated to gluten detection failed to detect deamidated gluten. After immunizing mice with the peptide LQPEEPFPE conjugated to keyhole limpet hemocyanin, five mouse monoclonal antibodies (mAbs) were produced and sequences of bound epitopes were determined as XPXEPFPE, where X is Q or E. The mAbs exhibited high specificity for deamidated gliadins and low molecular weight glutenin subunits. A competitive enzyme-linked immunosorbent assay (ELISA) based on INRA-DG1 mAb was developed with an IC50% of 85 ng/mL and a limit of detection of 25 ng/mL. The intra- and interassay coefficients of variation (CV) were <10% except for the interassay CV of the low-level control (40 ng/mL), which was 20%. This assay was capable of detecting three of the four deamidated gluten samples spiked in rice flour at 20 mg/kg.
Collapse
Affiliation(s)
- Olivier Tranquet
- INRA, UR1268 Biopolymers, Interactions, Assemblies, rue de la Geraudiere, Nantes cedex 03, France
| | - Roberta Lupi
- INRA, UR1268 Biopolymers, Interactions, Assemblies, rue de la Geraudiere, Nantes cedex 03, France
| | | | - Manon Pietri
- INRA, UR1268 Biopolymers, Interactions, Assemblies, rue de la Geraudiere, Nantes cedex 03, France
| | - Colette Larré
- INRA, UR1268 Biopolymers, Interactions, Assemblies, rue de la Geraudiere, Nantes cedex 03, France
| | - Sandra Denery-Papini
- INRA, UR1268 Biopolymers, Interactions, Assemblies, rue de la Geraudiere, Nantes cedex 03, France
| |
Collapse
|
22
|
Kucek LK, Veenstra LD, Amnuaycheewa P, Sorrells ME. A Grounded Guide to Gluten: How Modern Genotypes and Processing Impact Wheat Sensitivity. Compr Rev Food Sci Food Saf 2015; 14:285-302. [PMID: 33401796 DOI: 10.1111/1541-4337.12129] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Accepted: 01/04/2015] [Indexed: 12/30/2022]
Abstract
The role of wheat, and particularly of gluten protein, in our diet has recently been scrutinized. This article provides a summary of the main pathologies related to wheat in the human body, including celiac disease, wheat allergy, nonceliac wheat sensitivity, fructose malabsorption, and irritable bowel syndrome. Differences in reactivity are discussed for ancient, heritage, and modern wheats. Due to large variability among species and genotypes, it might be feasible to select wheat varieties with lower amounts and fewer types of reactive prolamins and fructans. Einkorn is promising for producing fewer immunotoxic effects in a number of celiac research studies. Additionally, the impact of wheat processing methods on wheat sensitivity is reviewed. Research indicates that germination and fermentation technologies can effectively alter certain immunoreactive components. For individuals with wheat sensitivity, less-reactive wheat products can slow down disease development and improve quality of life. While research has not proven causation in the increase in wheat sensitivity over the last decades, modern wheat processing may have increased exposure to immunoreactive compounds. More research is necessary to understand the influence of modern wheat cultivars on epidemiological change.
Collapse
Affiliation(s)
- Lisa Kissing Kucek
- School of Integrated Plant Science, Plant Breeding and Genetics Section, 240 Emerson Hall, Cornell Univ., Ithaca, NY, 14853, U.S.A
| | - Lynn D Veenstra
- School of Integrated Plant Science, Plant Breeding and Genetics Section, 240 Emerson Hall, Cornell Univ., Ithaca, NY, 14853, U.S.A
| | - Plaimein Amnuaycheewa
- Dept. of Agro-Industrial, Food, and Environmental Technology, Faculty of Applied Science, King Mongkut's Univ. of Technology North Bangkok, Bangkok, 10800, Thailand
| | - Mark E Sorrells
- School of Integrated Plant Science, Plant Breeding and Genetics Section, 240 Emerson Hall, Cornell Univ., Ithaca, NY, 14853, U.S.A
| |
Collapse
|
23
|
Lupi R, Masci S, Rogniaux H, Tranquet O, Brossard C, Lafiandra D, Moneret-Vautrin D, Denery-Papini S, Larré C. Assessment of the allergenicity of soluble fractions from GM and commercial genotypes of wheats. J Cereal Sci 2014. [DOI: 10.1016/j.jcs.2014.02.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
24
|
Rasheed A, Xia X, Yan Y, Appels R, Mahmood T, He Z. Wheat seed storage proteins: Advances in molecular genetics, diversity and breeding applications. J Cereal Sci 2014. [DOI: 10.1016/j.jcs.2014.01.020] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
25
|
Celakovska J, Bukač J. Food allergy in patients suffering from atopic dermatitis – association with concomitant allergic diseases. FOOD AGR IMMUNOL 2014. [DOI: 10.1080/09540105.2014.914470] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
|
26
|
Pasha I, Saeed F, Sultan MT, Batool R, Aziz M, Ahmed W. Wheat Allergy and Intolerence; Recent Updates and Perspectives. Crit Rev Food Sci Nutr 2013; 56:13-24. [DOI: 10.1080/10408398.2012.659818] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
27
|
Chu PT, Wen HW. Sensitive detection and quantification of gliadin contamination in gluten-free food with immunomagnetic beads based liposomal fluorescence immunoassay. Anal Chim Acta 2013; 787:246-53. [PMID: 23830446 DOI: 10.1016/j.aca.2013.05.014] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2012] [Revised: 05/03/2013] [Accepted: 05/05/2013] [Indexed: 12/30/2022]
Abstract
Gliadin from wheat is a common food allergen that can induce baker's asthma, wheat-dependent exercise-induced anaphylaxis, atopic dermatitis, and celiac disease. This gliadin assay focuses on rapidly screen and check for gluten contamination in raw materials and in the gluten-free food production process, not only for wheat-sensitive patients but also for the industries producing gluten-free foodstuffs. The developed assay incorporates the use of anti-gliadin antibody-conjugated immunomagnetic beads (IMBs) to capture the gliadin in samples and fluorescent dyes-loaded immunoliposomal nanovesicles (IMLNs) to produce and enhance the detection signal. Hence, a sandwich complex is formed as "IMBs-gliadin-IMLNs". Experimental results indicate that this detection platform exhibits good sensitivity for gliadin with a detection limit as low as 0.6 μg mL(-1) of gliadin; as the polyclonal antibody showed slight cross-reactions with barley and rye. Excellent recovery rates were found ranging from 83.5 to 102.6% as testing the spiked samples. Moreover, the CV (%) of intra- and inter-assay of this developed assay are 4.8-10.6% and 3.5-9.9%, respectively. Based on a parallel analysis of twenty food samples, the results of this developed assay provide a good consistency with those of an AOAC-approved ELISA kit without any false-negative results. The proposed assay method is thus a highly promising alternative method for detecting the contamination of gliadin in the food industry.
Collapse
Affiliation(s)
- Pei-Tzu Chu
- Department of Food Science and Biotechnology, National Chung Hsing University, Taichung, Taiwan, ROC
| | | |
Collapse
|
28
|
How much does transgenesis affect wheat allergenicity?: Assessment in two GM lines over-expressing endogenous genes. J Proteomics 2013; 80:281-91. [PMID: 23403254 DOI: 10.1016/j.jprot.2013.01.028] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Revised: 01/25/2013] [Accepted: 01/30/2013] [Indexed: 11/23/2022]
Abstract
UNLABELLED Wheat kernel albumins/globulins (A/G) and gluten proteins are responsible for baker's asthma and food allergy in atopic subjects. Although no commercial genetically modified wheats are currently being grown, they are under study and the allergenicity of GM products is a major concern. In order to establish the expected and unexpected effects of genetic transformation on allergenicity and also to carry out a safety assessment of genetic transformation, two GM wheat lines (bread and pasta wheat) transformed with endogenous genes were compared to their untransformed counterparts (wt), first by an allergenomic approach, and second, using ELISA with sera from patients suffering from food allergy to wheat and baker's asthma. The 2D immunoblots performed on sera from patients suffering from food allergy and baker's asthma on the A/G fraction of the four lines (two GM and two wt) revealed comparable IgE-binding profiles. A total of 109 IgE-binding spots were analyzed by mass spectrometry, and most of the proteins identified had already been described as allergens or potential allergens. Only two IgE-binding proteins were specific to one GM line. The concentration of specific IgE against the A/G fractions of GM wheat lines and their wt genotypes differed for some sera. BIOLOGICAL SIGNIFICANCE The originality of our paper is to relate the transformation of wheat lines with their potential allergenicity using patient sera, such focus has never been done before in wheat and should be of interest to the researches working in this field. Another interesting point of this paper is the study of two types of allergies (respiratory and food) on two wheat genotypes and their GM which reveals that some allergens already known in respiratory allergy could be involved in children suffering from wheat food allergy. In this paper we used a classical 2D proteomic analysis and the protein identifications were performed by mass spectrometry after spot picking and in gel trypsin hydrolysis. Concerning the LC-MS/MS analyses classical software and parameters were used as described in Material and methods. We worked on wheat which is actually not fully sequenced that was a difficulty; we therefore searched against two databanks (proteins and ESTs) in order to compare the results. Moreover all proteins reported in our paper were identified with at least three unique peptides. The identified proteins were checked for their potential allergenicity. In order to have a best interpretation of protein identified in terms of potential allergens, BLAST alignments were performed by using an allergen databank (SDAP). This allows the determination of the cross-reactivity of these identified proteins with known allergens of other species and also the prediction of a potential allergenicity.
Collapse
|
29
|
Wang S, Shen X, Ge P, Li J, Subburaj S, Li X, Zeller FJ, Hsam SLK, Yan Y. Molecular characterization and dynamic expression patterns of two types of γ-gliadin genes from Aegilops and Triticum species. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2012; 125:1371-84. [PMID: 22751951 DOI: 10.1007/s00122-012-1917-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2012] [Accepted: 06/06/2012] [Indexed: 05/25/2023]
Abstract
Gliadins were the major components of wheat storage proteins and determine the extensibility properties of gluten dough. In this work, 19 new full-length γ-gliadin genes were isolated from various Aegilops and Triticum species. Sequence characterization showed that a specific octapeptide and celiac disease (CD)-toxic epitope Gliγ-3 (VQGQGIIQPQQPAQL) were present in the rich glutamine domain and C-terminal non-repetitive domain, respectively. Based on the sequence features of both peptides, a new classification system for γ-gliadin gene family was established, in which γ-gliadins were classified into two types (types I and II) with each consisting of two groups. An uneven distribution of different types and groups of γ-gliadin genes was exhibited among 11 Aegilops and Triticum genomes. Phylogenetic analysis revealed that types I and II genes diverged at about 14 MYA while the divergence of 4 γ-gliadin group genes occurred at around 10 MYA almost simultaneously. The γ-gliadin genes from S(l) and B genomes displayed a different transcriptional expression pattern during grain development, and rapid increasing of gliadin mRNA and proteins occurred at 15-20 DPA. In addition, genome-specific variations of CD-toxic epitopes among Aegilops and Triticum genomes were found. The A genome and its related progenitor genomes A(u) and A(m) had fewer CD epitopes than other genomes, suggesting that these genomes might be valuable gene resources to remove CD toxic peptides for wheat quality improvement.
Collapse
Affiliation(s)
- Shunli Wang
- Key Laboratory of Genetics and Biotechnology, College of Life Science, Capital Normal University, Beijing, 100048, China
| | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Denery-Papini S, Bodinier M, Larré C, Brossard C, Pineau F, Triballeau S, Pietri M, Battais F, Mothes T, Paty E, Moneret-Vautrin DA. Allergy to deamidated gluten in patients tolerant to wheat: specific epitopes linked to deamidation. Allergy 2012; 67:1023-32. [PMID: 22737987 DOI: 10.1111/j.1398-9995.2012.02860.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/15/2012] [Indexed: 11/28/2022]
Abstract
BACKGROUND Gluten proteins can be modified by deamidation to enhance their solubility and technological applications. However, severe allergic reactions have been reported after the consumption of food products containing deamidated gluten (DG) in subjects tolerant to wheat. This work aimed to characterize allergen profiles for these patients in comparison with those of patients allergic to wheat and to identify IgE-binding epitopes. METHODS Sera were obtained from 15 patients allergic to DG and from nine patients allergic to wheat proteins (WP). IgE-binding profiles were characterized both in ELISA and in a humanized rat basophilic leukaemia (RBL) cell model. Epitopes were mapped on γ- and ω2-gliadin sequences by Pepscan, and effect of glutamine/glutamic acid substitutions was studied. RESULTS Compared to the heterogeneous pattern of allergens detected by IgE from patients allergic to WP, responses of patients allergic to DG were homogeneous. In ELISA, all the sera displayed IgE binding to deamidated γ- and ω2-gliadins and deamidated total gliadins, frequently with high concentrations. These modified proteins induced RBL degranulation with most of the sera from DG-allergic patients. A consensus epitope was found on native γ- and ω2-gliadins (QPQQPFPQ); it was repeated several times in their sequences. The substitution of two or three glutamines of this epitope into glutamic acid at positions Q3 or Q4 and Q8 (QPEEPFPE) increased its recognition the best. CONCLUSION Allergy to DG is a separate entity from wheat allergy. It can be evidenced by strong IgE binding to deamidated gliadins or peptides of the type QPEEPFPE.
Collapse
Affiliation(s)
- S. Denery-Papini
- UR1268 Biopolymers, Interactions, Assemblies; INRA; Nantes Cedex 03; France
| | - M. Bodinier
- UR1268 Biopolymers, Interactions, Assemblies; INRA; Nantes Cedex 03; France
| | - C. Larré
- UR1268 Biopolymers, Interactions, Assemblies; INRA; Nantes Cedex 03; France
| | - C. Brossard
- UR1268 Biopolymers, Interactions, Assemblies; INRA; Nantes Cedex 03; France
| | - F. Pineau
- UR1268 Biopolymers, Interactions, Assemblies; INRA; Nantes Cedex 03; France
| | - S. Triballeau
- UR1268 Biopolymers, Interactions, Assemblies; INRA; Nantes Cedex 03; France
| | - M. Pietri
- UR1268 Biopolymers, Interactions, Assemblies; INRA; Nantes Cedex 03; France
| | - F. Battais
- Polluants and Health/Immunotoxicity Department; INRS; Vandœuvre-Lès-Nancy; France
| | - T. Mothes
- Institute for Laboratory Medicine; University Hospital and Medical Faculty of the University; Leipzig; Germany
| | - E. Paty
- Service de Pneumologie et d'Allergologie pédiatriques; Groupe Hospitalier Necker; Paris Cedex 15; France
| | - D.-A. Moneret-Vautrin
- Faculté de Médecine de Nancy; Service d'Allergologie; Centre Hospitalier Jean Monnet; Epinal; France
| |
Collapse
|
31
|
Larré C, Lupi R, Gombaud G, Brossard C, Branlard G, Moneret-Vautrin DA, Rogniaux H, Denery-Papini S. Assessment of allergenicity of diploid and hexaploid wheat genotypes: identification of allergens in the albumin/globulin fraction. J Proteomics 2011; 74:1279-89. [PMID: 21473946 DOI: 10.1016/j.jprot.2011.03.014] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2010] [Revised: 03/07/2011] [Accepted: 03/11/2011] [Indexed: 12/01/2022]
Abstract
Wheat is an important part of the daily diet of millions of people. However, this staple food is also responsible for food allergies. Ancient cultivars of wheat are gaining interest today but nothing is known about their allergenicity. Many wheat proteins have been reported as causative food allergens, including some prolamin-type gluten proteins, and salt soluble proteins of the albumin/globulin (A/G) type. The objective of this work is to obtain information about the allergenicity of the salt soluble A/G fraction of an ancient diploid cultivar compared with a standard hexaploid bread wheat cultivar using 20 sera from patients with wheat allergy. Differences in the IgE reactivity of sera towards the two genotypes were quantified by ELISA. Qualitative differences in IgE-binding proteins were searched after 1D or 2D electrophoresis. For most of the sera, the concentration in A/G specific IgE was higher for the hexaploid T. aestivum (cv Récital) than for the diploid T. monococcum (cv Engrain). The analysis of 2D spots revealed by immunoblotting leads to the identification by mass spectrometry of 39 IgE-binding proteins, some of them unknown until now as wheat allergens. Numerous allergens were identified, differences observed between Engrain and Récital will be discussed.
Collapse
Affiliation(s)
- C Larré
- UR1268 BIA, INRA, Rue de la Géraudière, BP 71627, 44316 Nantes, France.
| | | | | | | | | | | | | | | |
Collapse
|
32
|
Molecular cloning of novel α-gliadin genes from Crithopsis delileana and the evolution analysis with those from Triticeae. Genes Genomics 2011. [DOI: 10.1007/s13258-010-0128-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
33
|
Moneret-Vautrin DA, Vitte J, Jacquenet S, Morisset M, Denery-Papini S, Renaudin JM, Codreanu F, Bonardel N, Fardeaux MF, Beaudouin E. Diagnostic de l’IgE-réactivité par analyse des composants moléculaires (test ISAC). REVUE FRANCAISE D ALLERGOLOGIE 2011. [DOI: 10.1016/j.reval.2011.01.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
34
|
Anderson OD, Gu YQ, Kong X, Lazo GR, Wu J. The wheat omega-gliadin genes: structure and EST analysis. Funct Integr Genomics 2009; 9:397-410. [PMID: 19367421 PMCID: PMC2700870 DOI: 10.1007/s10142-009-0122-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2009] [Revised: 02/26/2009] [Accepted: 03/08/2009] [Indexed: 10/26/2022]
Abstract
A survey and analysis is made of all available omega-gliadin DNA sequences including omega-gliadin genes within a large genomic clone, previously reported gene sequences, and ESTs identified from the large wheat EST collection. A contiguous portion of the Gli-B3 locus is shown to contain two apparently active omega-gliadin genes, two pseudogenes, and four fragments of the 3' portion of omega-gliadin sequences. Comparison of omega-gliadin sequences allows a phylogenetic picture of their relationships and genomes of origin. Results show three groupings of omega-gliadin active gene sequences assigned to each of the three hexaploid wheat genomes, and a fourth group thus far consisting of pseudogenes assigned to the A-genome. Analysis of omega-gliadin ESTs allows reconstruction of two full-length model sequences encoding the AREL- and ARQL-type proteins from the Gli-A3 and Gli-D3 loci, respectively. There is no DNA evidence of multiple active genes from these two loci. In contrast, ESTs allow identification of at least three to four distinct active genes at the Gli-B3 locus of some cultivars. Additional results include more information on the position of cysteines in some omega-gliadin genes and discussion of problems in studying the omega-gliadin gene family.
Collapse
Affiliation(s)
- Olin D Anderson
- Genomics and Gene Discovery Research Unit, Western Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, 800 Buchanan Street, Albany, CA 94710, USA.
| | | | | | | | | |
Collapse
|
35
|
Hurkman WJ, Vensel WH, Tanaka CK, Whitehand L, Altenbach SB. Effect of high temperature on albumin and globulin accumulation in the endosperm proteome of the developing wheat grain. J Cereal Sci 2009. [DOI: 10.1016/j.jcs.2008.06.014] [Citation(s) in RCA: 108] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
36
|
Expression of globulin-2, a member of the cupin superfamily of proteins with similarity to known food allergens, is increased under high temperature regimens during wheat grain development. J Cereal Sci 2009. [DOI: 10.1016/j.jcs.2008.07.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
37
|
Bodinier M, Brossard C, Triballeau S, Morisset M, Guérin-Marchand C, Pineau F, de Coppet P, Moneret-Vautrin DA, Blank U, Denery-Papini S. Evaluation of an in vitro mast cell degranulation test in the context of food allergy to wheat. Int Arch Allergy Immunol 2008; 146:307-20. [PMID: 18367844 DOI: 10.1159/000121465] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2007] [Accepted: 12/21/2007] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND Antigenic profiles obtained by ELISA with IgE from patients with wheat food allergy (WFA) established that major allergens are albumins/globulins (AG) for children suffering from atopic eczema/dermatitis syndrome (AEDS), omega5-gliadins for adults suffering from wheat-dependent exercise-induced anaphylaxis (WDEIA), anaphylaxis or urticaria and low-molecular-weight (LMW) glutenin subunits for patients with anaphylaxis. We aimed to characterize a new mast cell transfectant for its ability to degranulate with wheat proteins and patient sera and compare these results to those obtained by ELISA. METHODS Thirty sera from patients with WFA were tested: 14 with AEDS (group 1) and 16 with WDEIA, anaphylaxis or urticaria (group 2). An IgE Fc receptor (FcepsilonRI) humanized rat RBL-2H3 line was established by transfection with cDNAs encoding alpha-, beta- and gamma-subunits for the human IgE receptor. RESULTS A humanized RBL clone was selected for its capacity to express mRNA alpha-, beta- and gamma-subunits of FcepsilonRI, to bind allergen-specific human IgE and to degranulate. In group 1, sera induced enhanced degranulation with AG extract, but rarely reacted with gliadins and glutenins. In group 2, half of the sera showed degranulation with LMW glutenins whereas the AG fraction and lipid transfer proteins were rarely positive. omega5-Gliadins did not appear as a major allergen in degranulation assays, although functional allergen-specific IgE was measurable in appreciable amounts. CONCLUSION Our data demonstrate that in wheat food allergen evaluation, correlation exists between mast cell degranulation and IgE measurements, depending on the type of allergen. Therefore, the biological activity of some allergen types may also be affected by other parameters.
Collapse
Affiliation(s)
- M Bodinier
- Unité de Recherche 1268, Biopolymères, Interactions, Assemblages, Institut National de la Recherche Agronomique, Université de Nantes, Nantes, France.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
38
|
Altenbach S, Kothari K, Tanaka C, Hurkman W. Expression of 9-kDa non-specific lipid transfer protein genes in developing wheat grain is enhanced by high temperatures but not by post-anthesis fertilizer. J Cereal Sci 2008. [DOI: 10.1016/j.jcs.2007.03.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
39
|
Oita S, Yokota S. Characterization of Anti-peptide Antibody for Wheat Nonspecific Lipid Transfer Protein 1. J JPN SOC FOOD SCI 2008. [DOI: 10.3136/nskkk.55.137] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
40
|
Altenbach SB, Kothari KM. Omega gliadin genes expressed in Triticum aestivum cv. Butte 86: Effects of post-anthesis fertilizer on transcript accumulation during grain development. J Cereal Sci 2007. [DOI: 10.1016/j.jcs.2007.02.001] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
41
|
Bodinier M, Legoux MA, Pineau F, Triballeau S, Segain JP, Brossard C, Denery-Papini S. Intestinal translocation capabilities of wheat allergens using the Caco-2 cell line. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2007; 55:4576-83. [PMID: 17477542 DOI: 10.1021/jf070187e] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Because intestinal absorption of food protein can trigger an allergic reaction, the effect of wheat proteins on intestinal epithelial cell permeability was evaluated and the abilities of these proteins in native or pepsin-hydrolyzed state to cross the epithelial cell monolayer were compared. Enterocytic monolayers were established by culturing Caco-2 cells, a model of enterocytes, on permeable supports that separate the apical and basal compartments. Proteins were added into the apical compartment, and the transepithelial resistance (TER) was measured; proteins that crossed the cell monolayer were detected in the basal medium by ELISA. Wheat proteins did not alter the cell monolayer. TER and Caco-2 cell viability were conserved, and the passage of dextran was prevented. Native and pepsin-hydrolyzed forms of omega5-gliadin and lipid transfer proteins were detected in the basal medium. The results suggest that these two major allergens in food allergy to wheat were able to cross the cell monolayer by the transcellular route.
Collapse
Affiliation(s)
- Marie Bodinier
- INRA, Research Unit on Biopolymères, Interactions et Assemblages (BIA), and INRA, Université de Nantes, UMR 1280, F44316 Nantes, France.
| | | | | | | | | | | | | |
Collapse
|
42
|
|
43
|
Denery-Papini S, Lauriére M, Branlard G, Morisset M, Pecquet C, Choudat D, Merlino M, Pineau F, Popineau Y, Boulenc E, Bouchez-Mahiout I, Bodinier M, Moneret-Vautrin DA. Influence of the allelic variants encoded at the Gli-B1 locus, responsible for a major allergen of wheat, on IgE reactivity for patients suffering from food allergy to wheat. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2007; 55:799-805. [PMID: 17263477 DOI: 10.1021/jf062749k] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Wheat presents an important genetic diversity that could be useful to look for cultivars with reduced allergencity. omega5-Gliadins have been described as major allergens for wheat allergic patients suffering from wheat-dependent exercise-induced anaphylaxis (WDEIA) and some cases of chronic urticaria (U). Our objective was to study the influence of genetic variability at the Gli-B1 locus encoding for omega5-gliadins on the reactivity of IgE antibodies from these patients. We selected cultivars expressing 13 alleles at Gli-B1 including a wheat/rye translocation and studied the reactivity to gliadins of a rabbit antiserum specific for omega5-gliadins and of IgE from 10 patients. The antiserum and IgE from nine patients with WDEIA and U strongly detected omega5-gliadins expressed by most of the Gli-B1 alleles but showed no or faint responses to the gliadins and secalins extracted from the translocated wheat. The selection of genotypes lacking the Gli-B1 locus may reduce wheat allergenicity.
Collapse
Affiliation(s)
- Sandra Denery-Papini
- Unité de Recherche sur les Biopolymères, leurs Interactions et Assemblages (BIA), INRA, Rue de la Géraudière, BP 71627, 44316 Nantes cedex 3, France.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Leszczyńska J, Łącka A, Bryszewska M. The use of transglutaminase in the reduction of immunoreactivity of wheat flour. FOOD AGR IMMUNOL 2006. [DOI: 10.1080/09540100600870279] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
|
45
|
Matsuo H, Kohno K, Niihara H, Morita E. Specific IgE determination to epitope peptides of omega-5 gliadin and high molecular weight glutenin subunit is a useful tool for diagnosis of wheat-dependent exercise-induced anaphylaxis. THE JOURNAL OF IMMUNOLOGY 2006; 175:8116-22. [PMID: 16339549 DOI: 10.4049/jimmunol.175.12.8116] [Citation(s) in RCA: 117] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Wheat omega-5 gliadin and a high m.w. glutenin subunit (HMW-glutenin) have been reported as major allergens in wheat-dependent exercise-induced anaphylaxis. A simultaneous detection of specific IgE to epitope sequences of both proteins is considered to be a reliable method for diagnosis of wheat-dependent exercise-induced anaphylaxis. However, the IgE-binding epitope of HMW-glutenin remains unknown. The aim of this study was to determine the IgE-binding epitopes of HMW-glutenin to establish a useful system of identifying patients with wheat-dependent exercise-induced anaphylaxis. For determination of IgE-binding epitopes of HMW-glutenin overlapping peptides were synthesized and reactivities of IgE Abs in the sera of patients to those peptides were analyzed. Three IgE-binding epitopes, QQPGQ, QQPGQGQQ, and QQSGQGQ, were identified within primary sequence of HMW-glutenin. Epitope peptides, which include IgE-binding sequences of omega-5 gliadin and a HMW-glutenin, were synthesized and peptide-specific IgE Abs were measured by CAP-System fluorescent enzyme immunoassay. Twenty-nine of 30 patients with wheat-dependent exercise-induced anaphylaxis had specific IgE Abs to these epitope peptides. None of the 25 sera from healthy subjects reacted to both epitope peptides. Twenty-five patients with atopic dermatitis who had specific IgE to wheat and/or gluten had very low or nonexistent levels of epitope peptide-specific IgE Abs. These results indicated that measurement of IgE levels specific to epitope peptides of omega-5 gliadin and HMW-glutenin is useful as an in vitro diagnostic method for the assessment of patients with wheat-dependent exercise-induced anaphylaxis.
Collapse
Affiliation(s)
- Hiroaki Matsuo
- Department of Dermatology, Shimane University School of Medicine, Izumo, Japan.
| | | | | | | |
Collapse
|
46
|
Hischenhuber C, Crevel R, Jarry B, Mäki M, Moneret-Vautrin DA, Romano A, Troncone R, Ward R. Review article: safe amounts of gluten for patients with wheat allergy or coeliac disease. Aliment Pharmacol Ther 2006; 23:559-75. [PMID: 16480395 DOI: 10.1111/j.1365-2036.2006.02768.x] [Citation(s) in RCA: 137] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
For both wheat allergy and coeliac disease the dietary avoidance of wheat and other gluten-containing cereals is the only effective treatment. Estimation of the maximum tolerated amount of gluten for susceptible individuals would support effective management of their disease. Literature was reviewed to evaluate whether an upper limit for gluten content in food, which would be safe for sufferers from both diseases, could be identified. When setting gluten limits for coeliac disease sufferers, the overall potential daily intake should be considered, while for wheat allergy limits should be based on single servings. For coeliac disease sufferers this limit should lie between 10 and 100 mg daily intake. For wheat allergy, lowest eliciting doses for children lie in the lower milligram range, while for adults they are most significantly higher. Gliadins (part of the gluten proteins) not only trigger coeliac disease, but are also major allergens in wheat allergy. Therefore, measurement of gliadins with validated enzyme-linked immunosorbent assay methods provides an appropriate marker for assessing gluten and/or wheat protein contents in food. Available data suggest that a maximum gluten content for 'gluten-free' foods could be set, which protects both wheat allergy sufferers and coeliac patients.
Collapse
|
47
|
Matsuo H, Kohno K, Morita E. Molecular cloning, recombinant expression and IgE-binding epitope of omega-5 gliadin, a major allergen in wheat-dependent exercise-induced anaphylaxis. FEBS J 2005; 272:4431-8. [PMID: 16128812 DOI: 10.1111/j.1742-4658.2005.04858.x] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Wheat omega-5 gliadin has been identified as a major allergen in wheat-dependent exercise-induced anaphylaxis. We have detected seven IgE-binding epitopes in primary sequence of the protein. We newly identified four additional IgE-binding epitope sequences, QQFHQQQ, QSPEQQQ, YQQYPQQ and QQPPQQ, in three patients with wheat-dependent exercise-induced anaphylaxis in this study. Diagnosis and therapy of food allergy would benefit from the availability of defined recombinant allergens. However, because omega-5 gliadin gene has not been cloned, recombinant protein is currently unavailable. We sought to clone the omega-5 gliadin gene and produce the homogeneous recombinant protein for use in an in vitro diagnostic tool. Using a PCR-based strategy we isolated two full-length omega-5 gliadin genes, designated omega-5 and omega-5b, from wheat genomic DNA and determined the nucleotide sequences. The protein encoded by omega-5a was predicted to be 439 amino acids long with a calculated mass of 53 kDa; the omega-5b gene would encode a 393 amino acid, but it contains two stop codons indicating that omega-5b is pseudogene. The C-terminal half (178 amino acids) of the omega-5a gliadin protein, including all 11 IgE-binding epitope sequences, was expressed in Escherichia coli by means of the pET system and purified using RP-HPLC. Western blot analysis and dot blot inhibition assay of recombinant and native omega-5 gliadin purified from wheat flour demonstrated that recombinant protein had IgE-binding ability. Our results suggest that the recombinant protein can be a useful tool for identifying patients with wheat-dependent exercise-induced anaphylaxis in vitro.
Collapse
Affiliation(s)
- Hiroaki Matsuo
- Department of Dermatology, Shimane University School of Medicine, Izumo, Japan.
| | | | | |
Collapse
|
48
|
Benitez-Cardoza CG, Rogniaux H, Popineau Y, Guéguen J. Cloning, bacterial expression, purification and structural characterization of N-terminal-repetitive domain of gamma-Gliadin. Protein Expr Purif 2005; 46:358-66. [PMID: 16214369 DOI: 10.1016/j.pep.2005.08.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2005] [Revised: 08/19/2005] [Accepted: 08/25/2005] [Indexed: 11/16/2022]
Abstract
The gene encoding the repetitive domain located in the N-terminal half of gamma-Gliadin from wheat endosperm has been subcloned into a thioredoxin expression system (pET102/D-Topo). It was over-expressed as fusion protein with thioredoxin in Escherichia coli. Thioredoxin was removed by enterokinase cleavage or by acid cleavage at the respective engineered recognition sites. The soluble N-terminal half of gamma-Gliadin was purified by affinity and reverse-phase chromatography. While, the enterokinase cleavage leaded to only one species detectable by mass spectroscopy, the acid cleavage resulted in a three different length polypeptides, due to the presence of the same number of acid cleavage sites. The secondary structure of the purified protein domain was analysed by circular dichroism, showing an spectral shape common to a Poly(Pro) II conformation. The spectrum is dominated by a large negative peak centred around 201 nm and a broad shoulder centred around 225 nm. Also, the temperature denaturation process was studied. The differences observed in the spectra show two main tendencies, the increment of the shoulder intensity, and the drop of the intensity of the peak around 201. When the sample was cooled down, the change on intensity of the shoulder around 225 was completely reversible and that around the 201 nm peak reached a reversibility of 90%. Such structure and thermal behaviour are characteristic of the repetitive domains of the wheat prolamins.
Collapse
Affiliation(s)
- Claudia G Benitez-Cardoza
- Programa Institucional en Biomedicina Molecular ENMyH-IPN, Guillermo Massieu Helguera No. 239 Fraccionamiento La Escalera Ticoman CP 07320, México DF, Mexico.
| | | | | | | |
Collapse
|