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Ma B, Fu X, Zhu P, Lu Z, Niu J, Lu F. Allergenicity, assembly and applications of ovalbumin in egg white: a review. Crit Rev Food Sci Nutr 2023:1-17. [PMID: 37096553 DOI: 10.1080/10408398.2023.2202774] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2023]
Abstract
Ovalbumin (OVA), the most abundant protein in egg whites, has been widely used in various industries. Currently, the structure of OVA has been clearly established, and the extraction of high-purified OVA has become feasible. However, the allergenicity of OVA is still a serious problem because it can cause severe allergic reactions and may even be life-threatening. The structure and allergenicity of the OVA can be altered by many processing methods. In this article, a detailed description on the structure and a comprehensive overview on the extraction protocols and the allergenicity of OVA was documented. Additionally, the information on assembly and potential applications of OVA was summarized and discussed in detail. Physical treatment, chemical modification, and microbial processing can be applied to alter the IgE-binding capacity of OVA by changing its structure and linear/sequential epitopes. Furthermore, research indicated that OVA could assemble with itself or other biomolecules into various forms (particles, fibers, gels, and nanosheets), which expanded its application in the food field. OVA also shows excellent application prospects, including food preservation, functional food ingredients and nutrient delivery. Therefore, OVA demonstrates significant investigation value as a food grade ingredient.
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Affiliation(s)
- Bin Ma
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, PR China
| | - Xing Fu
- National Research and Development Center for Egg Processing, College of Food Science and Technology, Huazhong Agricultural University, Wuhan, PR China
| | - Ping Zhu
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, PR China
| | - Zhaoxin Lu
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, PR China
| | - Jiafeng Niu
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, PR China
| | - Fengxia Lu
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, PR China
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2
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Ovalbumin, an outstanding food hydrocolloid: Applications, technofunctional attributes, and nutritional facts, A systematic review. Food Hydrocoll 2023. [DOI: 10.1016/j.foodhyd.2023.108514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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3
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Zhang Q, Huang Z, Li H, Cen C, Zheng R, Lili C, Zhang S, Wang Y, Fu L. Deciphering Changes in the Structure and IgE-Binding Ability of Ovalbumin Glycated by α-Dicarbonyl Compounds under Simulated Heating. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:1984-1995. [PMID: 35112874 DOI: 10.1021/acs.jafc.1c06939] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
As a complex reaction, biological consequences of the Maillard reaction (MR) on dietary proteins need to be deciphered. Despite previous studies on the structural and antigenic properties of ovalbumin (OVA) by MR, associated changes induced by specific MR intermediates and their downstream products are largely unknown. This study focused on the impacts of glycation by α-dicarbonyl compounds (α-DCs), intermediates of MR and precursors of advanced glycation end-products (AGEs), on the structural and IgE-binding properties of ovalbumin (OVA) under simulated heating. Methylglyoxal (MGO), glyoxal (GO), and butanedione (BU) were selected as typical α-DCs to generate glycated OVA with different AGE-modifications (AGE-Ms). The results showed that reactions between OVA and α-DCs generated OVA-AGE with various degrees of modification and conformational unfolding, and the reactivity of α-DCs followed the order GO > MGO > BU. Depending on the precursor type, the levels of 10 specific AGEs were verified, and the amounts of total AGEs increased with heating temperature and α-DC dosage. Compared to native OVA, glycated OVA showed reduced IgE-binding levels but with sRAGE-binding ligands, the extent of which was associated with the contents of total AGEs and Nε-carboxymethyllysine, and changes in certain protein conformational structures. High-resolution mass spectrometry further identified different AGE-Ms on the Lys and Arg residues of OVA, confirming variations in the glycation sites and their associations with the immunoreactive epitopes of OVA under different conditions.
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Affiliation(s)
- Qiaozhi Zhang
- Food Safety Key Laboratory of Zhejiang Province, School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, P. R. China
| | - Zhijie Huang
- Food Safety Key Laboratory of Zhejiang Province, School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, P. R. China
| | - Huatao Li
- Food Safety Key Laboratory of Zhejiang Province, School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, P. R. China
| | - Congnan Cen
- Food Safety Key Laboratory of Zhejiang Province, School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, P. R. China
| | - Ruixing Zheng
- Ningbo Academy of Product and Food Quality Inspection (Ningbo Fibre Inspection Institute), Ningbo 315048, P. R. China
| | - Cao Lili
- Ningbo Academy of Product and Food Quality Inspection (Ningbo Fibre Inspection Institute), Ningbo 315048, P. R. China
| | - Shufen Zhang
- Ningbo Academy of Product and Food Quality Inspection (Ningbo Fibre Inspection Institute), Ningbo 315048, P. R. China
| | - Yanbo Wang
- Food Safety Key Laboratory of Zhejiang Province, School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, P. R. China
| | - Linglin Fu
- Food Safety Key Laboratory of Zhejiang Province, School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, P. R. China
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Are Physicochemical Properties Shaping the Allergenic Potency of Animal Allergens? Clin Rev Allergy Immunol 2021; 62:1-36. [DOI: 10.1007/s12016-020-08826-1] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/09/2020] [Indexed: 12/31/2022]
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Yang Y, Liu G, Tu Z, Wang H, Hu Y, Mao J, Zhang J. Insight into the Mechanism of Reduced IgG/IgE Binding Capacity in Ovalbumin as Induced by Glycation with Monose Epimers through Liquid Chromatography and High-Resolution Mass Spectrometry. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:6065-6075. [PMID: 32396375 DOI: 10.1021/acs.jafc.0c01233] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Ovalbumin (OVA) is one of the major food allergens in hen eggs. In this work, it was demonstrated that glycation with d-glucose and its epimers, including d-mannose, d-allose, d-galactose, and l-idose, could effectively attenuate the IgG/IgE binding of OVA, which was attributed to the covalent masking by sugars and to its structural changes. The glycation sites were determined, and their average degree of substitution was found using liquid chromatography coupled with high-resolution mass spectrometry. Fluctuations in OVA conformation were monitored by conventional spectrometry. Compared to those of OVA-Man and OVA-Glu, OVA-All, OVA-Gal, and OVA-Ido showed a higher glycation extent, and the alterations on their steric layouts were more drastic, suggesting that the configuration of hydroxyl groups at positions C-3, C-4, and C-5 in sugars might be important for the glycation reactivity; as such, their capabilities in binding with IgG/IgE decreased more significantly. Attempts were made to provide valuable information for in-depth understanding of the differences in biochemical functionality among epimeric sugars. These insights would be helpful for designing sweetened food products with a desirable level of safety.
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Affiliation(s)
- Yipeng Yang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China
| | - Guangxian Liu
- Jiangxi Academy of Agricultural Sciences, Nanchang, Jiangxi 330200, China
| | - Zongcai Tu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China
- Engineering Research Center of Freshwater Fish High-Value Utilization of Jiangxi Province, College of Life Sciences, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
| | - Hui Wang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China
| | - Yueming Hu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China
| | - Jihua Mao
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China
| | - Jingjing Zhang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China
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6
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Impact of food processing on the structural and allergenic properties of egg white. Trends Food Sci Technol 2018. [DOI: 10.1016/j.tifs.2018.06.005] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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7
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Scientific Opinion on the evaluation of allergenic foods and food ingredients for labelling purposes. EFSA J 2014. [DOI: 10.2903/j.efsa.2014.3894] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
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Kim MJ, Lee JW, Sung NY, Kim SM, Hwang YJ, Kim JH, Song BS. Comparison Study on Changes of Antigenicities of Egg Ovalbumin Irradiated by Electron Beam or X-Ray. Korean J Food Sci Anim Resour 2014; 34:570-5. [PMID: 26761489 PMCID: PMC4662217 DOI: 10.5851/kosfa.2014.34.5.570] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Revised: 06/19/2014] [Accepted: 06/23/2014] [Indexed: 11/08/2022] Open
Abstract
This study was conducted to compare the effects of two forms of radiation (electron and X-ray; generated by an electron beam accelerator) on the conformation and antigenic properties of hen’s egg albumin, ovalbumin (OVA), which was used as a model protein. OVA solutions (2.0 mg/mL) were individually irradiated by electron beam or X-ray at the absorbed doses of 0 (control), 2, 4, 6, 8, and 10 kGy. No differences between the two forms of radiation on the structural properties of OVA were shown by spectrometric and electrophoretic analyses. The turbidity of OVA solution increased and the main OVA bands on polyacrylamide gels disappeared after irradiation, regardless of the radiation source. In competitive indirect enzyme-linked immunosorbent assay, OVA samples irradiated by electron beam or X-ray showed different immunological responses in reactions with monoclonal and polyclonal antibodies (immunoglobulin G) produced against non-irradiated OVA. The results indicate that electron beam irradiation and X-ray irradiation produced different patterns of structural changes to the OVA molecule.
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Affiliation(s)
- Mi-Jung Kim
- Department of Food Science and Nutrition, Anyang University, Anyang 430-714, Korea
| | - Ju-Woon Lee
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup 580-185, Korea
| | - Nak-Yoon Sung
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup 580-185, Korea
| | - Su-Min Kim
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup 580-185, Korea
| | - Young-Jung Hwang
- Department of Food Service and Culinary, International University of Korea, Jinju 660-759, Korea
| | - Jae-Hun Kim
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup 580-185, Korea
| | - Beom-Seok Song
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup 580-185, Korea
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Ma X, Chen H, Gao J, Hu C, Li X. Conformation affects the potential allergenicity of ovalbumin after heating and glycation. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2013; 30:1684-92. [DOI: 10.1080/19440049.2013.822105] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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10
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Luo C, Hu C, Gao J, Li X, Wu Z, Yang A, Chen H. A potential practical approach to reduce Ara h 6 allergenicity by gamma irradiation. Food Chem 2013. [DOI: 10.1016/j.foodchem.2012.09.091] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Jiménez-Saiz R, Belloque J, Molina E, López-Fandiño R. Human immunoglobulin E (IgE) binding to heated and glycated ovalbumin and ovomucoid before and after in vitro digestion. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:10044-10051. [PMID: 21846147 DOI: 10.1021/jf2014638] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This study focuses on the effect of heating and Maillard reaction (MR) on the in vitro digestibility and rabbit IgG- and human IgE-binding properties of ovalbumin (OVA) and ovomucoid (OM) to estimate the impact of processing on their allergenicity. With the human sera studied, heat treatment significantly reduced IgE binding to both OVA and OM, whereas MR reduced the IgE binding to OVA but increased IgE binding to OM. In contrast, heat treatment significantly favored OVA digestibility but glycation impaired it, and these treatments did not affect the digestibility of OM. The changes observed in the digestibility affected the immunogenicity of the digests accordingly, so that the higher the digestibility, the lower the antibody binding. Heat treatment and glycation by MR showed an influence on the potential allergenicity of the main egg white proteins that could be related to their resistance to denaturation and digestive enzymes.
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Affiliation(s)
- Rodrigo Jiménez-Saiz
- Institute of Food Science Research (CIAL) CSIC-UAM, Universidad Autónoma de Madrid, C/Nicolás Cabrera 9, 28049 Madrid, Spain
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Fu TJ, Maks N, Banaszewski K. Effect of heat treatment on the quantitative detection of egg protein residues by commercial enzyme-linked immunosorbent assay test kits. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2010; 58:4831-4838. [PMID: 20349964 DOI: 10.1021/jf903536z] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
This study examined the changes in the solubility of egg proteins as affected by different heat treatments and compared the performances of three commercial test kits for the quantitation of protein residues in heat-treated samples. National Institute of Standards and Technology (NIST) whole egg standard reference material #8415 and Henningsen spray-dried whole egg powder were subjected to heating in the presence of water at 60 and 100 degrees C, autoclaving for 5 or 10 min, or dry heating at 60-400 degrees C for 10 min. The amount of protein in the heated samples was assayed using the bicinchoninic acid total protein assay as well as egg-specific commercial enzyme-linked immunosorbent assay (ELISA) kits. Elevated heat resulted in a lower level of proteins extracted. Neogen's Veratox kit, which is reactive to multiple proteins in egg, greatly underestimated the amount of residual proteins in the boiled or autoclaved samples. Tepnel BioSystems' Biokits assay, which employs antibodies specific to a heat-stable marker protein (ovomucoid), registered a higher level of protein in these samples. Both test kits substantially underestimated the amount of residual proteins in samples dry-heated at temperatures >176 degrees C. The Morinaga test, using an improved extraction buffer, registered the highest level of protein in the heat-treated NIST samples but not the Henningsen samples. The underestimation by the commercial test kits was attributed to changes in the immunoreactivity of residual proteins after heat treatments and not the differences in the amount of protein extracted. These results suggest that thermal processing may affect the quantitative analysis of allergens and needs to be taken into account in the validation of commercial ELISA test kits.
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Affiliation(s)
- Tong-Jen Fu
- U.S. Food and Drug Administration, National Center for Food Safety and Technology, Summit-Argo, Illinois 60501, USA.
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14
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Mine Y, Yang M. Recent advances in the understanding of egg allergens: basic, industrial, and clinical perspectives. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2008; 56:4874-4900. [PMID: 18543935 DOI: 10.1021/jf8001153] [Citation(s) in RCA: 118] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The emergence of egg allergy has had both industrial and clinical implications. In industrialized countries, egg allergy accounts for one of the most prevalent food hypersensitivities, especially in children. Atopic dermatitis represents the most common clinical manifestation in infancy; however, the range of clinical signs is broad and encompasses life-threatening anaphylaxis. The dominant egg allergens are proteins and are mainly present in the egg white, for example, ovalbumin, ovomucoid, ovotransferrin, and lysozyme. However, egg yolk also displays low-level allergenicity, for example, alpha-livetin. Strict avoidance of the offending food remains the most common recommendation for egg-allergic individuals. Nevertheless, the omnipresence of egg-derived components in prepackaged or prepared foods makes it difficult. Therefore, more efficient preventive approaches are investigated to protect consumers from inadvertent exposure and ensuing adverse reactions. On the one hand, commercial kits have become readily available that allow for the detection of egg contaminants at trace levels. On the other hand, attempts to produce hypoallergenic egg-containing products through food-processing techniques have met with promising results, but the approach is limited due to its potentially undesirable effects on the unique functional and sensory attributes of egg proteins. Therefore, the development of preventive or curative strategies for egg allergy remains strongly warranted. Pilot studies have suggested that oral immunotherapy (IT) with raw or cooked preparations of egg may represent a safe alternative, immediately available to allergic subjects, but remains applicable to only nonanaphylactic patients. Due to the limitations of conventional IT, novel forms of immunotherapy are sought based on information obtained from the molecular characterization of major egg allergens. In the past decade, promising approaches to the treatment and prevention of egg allergy have been explored and include, among others, the production of hypoallergenic recombinant egg proteins, the development of customized peptides, and bacterial-mediated immunotherapy. Nonspecific approaches have also been evaluated, and preliminary trials with the use of probiotic bacteria have yielded encouraging results. The current understanding of egg allergens offers novel approaches toward the making of food products safe for human consumption and the development of efficient immunotherapeutic strategies.
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Affiliation(s)
- Yoshinori Mine
- Department of Food Science, University of Guelph, Guelph, Ontario N1G2W1, Canada.
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Martínez Gómez JM, Fischer S, Csaba N, Kündig TM, Merkle HP, Gander B, Johansen P. A protective allergy vaccine based on CpG- and protamine-containing PLGA microparticles. Pharm Res 2007; 24:1927-35. [PMID: 17541735 DOI: 10.1007/s11095-007-9318-0] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2007] [Accepted: 04/16/2007] [Indexed: 01/06/2023]
Abstract
PURPOSE Allergen-specific immunotherapy (SIT) requires dozens of subcutaneous injections over 3 to 5 years in order to control IgE-mediated hypersensitivity, which is a T-helper 2 (Th2)-associated pathology. This study investigates the use of poly(lactide-co-glycolide) (PLGA) microparticles combined with immunostimulatory oligodeoxynucleotide (CpG), as well as protamine in SIT. MATERIALS AND METHODS We prepared microparticle formulations with the major allergen of bee venom, phospholipase A2 (PLA2), and analyzed the effect of co-encapsulated or admixed CpG in both naïve and bee venom allergic mice. RESULTS Mice immunized with microparticles containing only PLA2 induced weak antibody responses. In contrast, the combination with CpG resulted in strong PLA2-specific antibody responses. The presence of CpG was required for the induction of the Th1-associated isotype IgG2a, and the titers of IgG2a in sensitized mice correlated with a better protection against an allergen challenge. The effect of CpG was further strengthened when protamine was co-encapsulated for complexation of CpG. CONCLUSIONS This study shows that allergen-specific immunotherapy with a PLGA-based allergen-delivery system in combination with CpG enhanced the induction of protective IgG2a immune responses. This may improve SIT compliance and shorten its duration.
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Affiliation(s)
- Julia M Martínez Gómez
- Unit for Experimental Immunotherapy, Department of Dermatology, University Hospital Zurich, Gloriastrasse 31, 8091, Zurich, Switzerland
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Lee JW, Seo JH, Kim JH, Lee SY, Byun MW. Comparison of the changes of the antigenicities of a hen's egg albumin by a gamma and an electron beam irradiation. Radiat Phys Chem Oxf Engl 1993 2007. [DOI: 10.1016/j.radphyschem.2006.06.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Johansen P, Senti G, Martínez Gómez JM, Wüthrich B, Bot A, Kündig TM. Heat denaturation, a simple method to improve the immunotherapeutic potential of allergens. Eur J Immunol 2006; 35:3591-8. [PMID: 16285011 DOI: 10.1002/eji.200535076] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Allergen-specific immunotherapy (SIT) leads to a long-term amelioration of IgE- and Th2-mediated allergic diseases. However, SIT efficiency is low, with years of treatment along with frequent allergic side effects. The goal of this study was to reduce the side effects by destroying IgE-binding epitopes, i.e. by heat-denaturation, while preserving the therapeutic effect. Mice were immunised with bee venom, birch pollen, grass pollen or cat hair allergens, or with ovalbumin. Heat-denatured allergens bound less IgE but enhanced Th1-dependent IgG2a production as measured by ELISA. The strong IgG2a antibody responses also prevented allergic anaphylaxis in mice, as measured by body temperature drop after a challenge with a high allergen dose. We found that optimal heat-denaturation of allergens left a small proportion in the native conformation to sufficiently stimulate B cells, while non-B cell-mediated effects were probably amplified. The enhanced immunogenicity of heat-denatured allergens is likely explained by enhanced antigen presentation to T cells due to the particulate nature of heat-denatured proteins. This enables Th1 skewing of the immune response with strong production of IgG2a in mice. Therefore, heat-denaturation represents probably the simplest way to enhance the efficiency of SIT while reducing its side effects.
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Affiliation(s)
- Pål Johansen
- Unit for Experimental Immunotherapy, University Hospital of Zurich, Zurich, Switzerland.
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Lee JW, Seo JH, Kim JH, Lee SY, Kim KS, Byun MW. Changes of the antigenic and allergenic properties of a hen’s egg albumin in a cake with gamma-irradiated egg white. Radiat Phys Chem Oxf Engl 1993 2005. [DOI: 10.1016/j.radphyschem.2004.03.088] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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19
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Changes of the immune reactivities of antibodies produced against gamma-irradiated antigen. Radiat Phys Chem Oxf Engl 1993 2004. [DOI: 10.1016/j.radphyschem.2004.04.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Seo JH, Lee JW, Lee YS, Lee SY, Kim MR, Yook HS, Byun MW. Change of an egg allergen in a white layer cake containing gamma-irradiated egg white. J Food Prot 2004; 67:1725-30. [PMID: 15330540 DOI: 10.4315/0362-028x-67.8.1725] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
This study was conducted to evaluate the reduction of an egg allergen in a cake containing gamma-irradiated egg white. A white layer cake was manufactured by a commercial formula with 10- or 20-kGy-irradiated egg white. Enzyme-linked immunosorbent assays (ELISAs) with immunoglobulin (Ig) E from egg-allergic patients and with rabbit anti-ovalbumin IgG were used to identify and quantify ovalbumin (OVA) in the samples. Concentrations of native OVA detected by IgE and IgG in the control were 432.88 and 375.46 microg/g sample, respectively. However, native OVA in samples with 10- and 20-kGy-irradiated egg white was detected at low concentrations (14.27 and 8.78 microg/g, respectively) by IgE (P < 0.05); IgG recognized OVA more often in 10- and 20-kGy samples than in controls. Conformational cleavage of OVA by irradiation could explain the IgG result. The results appear to suggest that irradiating egg white might reduce its allergenicity, which could be used in the production of baked goods of reduced allergenicity.
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Affiliation(s)
- Ji-Hyun Seo
- Department of Radiation Food Science and Biotechnology, Korea Atomic Energy Research Institute, Yuseong, Daejeon, 305-600, Korea
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Safety Evaluation on Mutagenicity of White Layer Cake Containing Gamma-Irradiated Egg White. ACTA ACUST UNITED AC 2003. [DOI: 10.3746/jkfn.2003.32.7.1172] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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22
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Lee JW, Lee KY, Yook HS, Lee SY, Kim HY, Jo C, Byun MW. Allergenicity of hen's egg ovomucoid gamma irradiated and heated under different pH conditions. J Food Prot 2002; 65:1196-9. [PMID: 12117259 DOI: 10.4315/0362-028x-65.7.1196] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
This study was conducted to evaluate the effect of a treatment combining gamma radiation and heating on the allergenic properties of hen's egg ovomucoid (OM) under basic pH conditions. OM solutions of 2.0 mg/ml with pHs of 7.0, 9.0, and 10.0 were gamma irradiated at 10 kGy, heated at 100 degrees C for 15 min, or both. Half of the treated pH 10.0 sample solution was restored to pH 7.4 by dialysis. OM solutions were tested by a competitive direct enzyme-linked immunosorbent assay formatted with immunoglobulin E from egg-hypersensitive patients. An equation was obtained for quantifying intact OM from the standard curve, and the detected concentration of intact OM was calculated. The concentration of intact OM decreased with irradiation or heating, and the rate of the decrease was higher for a basic pH condition than for the physiological condition. The combination of irradiation and heating was very effective in reducing the amount of intact OM regardless of the pH condition. After treatment, the restoration of the pH to 7.4 did not affect the concentration of OM. The results of this study indicate that a combination of irradiation and heating might be an effective method for reducing egg hypersensitivity resulting from OM.
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Affiliation(s)
- Ju-Woon Lee
- The Team for Radiation Food Science and Biotechnology, Korea Atomic Energy Research Institute, Yuseong, Daejeon
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