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Jeong KY, Lopata AL. Editorial: Spotlight on allergy research in Asia. FRONTIERS IN ALLERGY 2024; 5:1371795. [PMID: 38511205 PMCID: PMC10951383 DOI: 10.3389/falgy.2024.1371795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Accepted: 02/20/2024] [Indexed: 03/22/2024] Open
Affiliation(s)
- Kyoung Yong Jeong
- Institute of Allergy, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Andreas Ludwig Lopata
- Australian Institute of Tropical Health & Medicine, James Cook University, Townsville, QLD, Australia
- Tropical Futures Institute, James Cook University, Singapore, Singapore
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2
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Pfeiffer S, Swoboda I. Problems Encountered Using Fungal Extracts as Test Solutions for Fungal Allergy Diagnosis. J Fungi (Basel) 2023; 9:957. [PMID: 37888213 PMCID: PMC10607634 DOI: 10.3390/jof9100957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 09/15/2023] [Accepted: 09/18/2023] [Indexed: 10/28/2023] Open
Abstract
Fungal allergy is a worldwide public health burden, and problems associated with a reliable allergy diagnosis are far from being solved. Especially, the lack of high-quality standardized fungal extracts contributes to the underdiagnosis of fungal allergy. Compared to the manufacturing processes of extracts from other allergen sources, the processes used to manufacture extracts from fungi show the highest variability. The reasons for the high variability are manifold as the starting material, the growth conditions, the protein extraction methods, and the storage conditions all have an influence on the presence and quantity of individual allergens. Despite the vast variety of studies that have analyzed the impact of the different production steps on the allergenicity of fungal allergen extracts, much remains unknown. This review points to the need for further research in the field of fungal allergology, for standardization and for generally accepted guidelines on the preparation of fungal allergen extracts. In particular, the standardization of fungal extracts has been and will continue to be difficult, but it will be crucial for improving allergy diagnosis and therapy.
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Affiliation(s)
| | - Ines Swoboda
- The Molecular Biotechnology Section, Department Applied Life Sciences, FH Campus Wien, University of Applied Sciences, 1100 Vienna, Austria;
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Yi MH, Kim M, Yong TS, Kim JY. Investigating the microbiome of house dust mites in South Korea. FRONTIERS IN ALLERGY 2023; 4:1240727. [PMID: 37655177 PMCID: PMC10466795 DOI: 10.3389/falgy.2023.1240727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 08/08/2023] [Indexed: 09/02/2023] Open
Abstract
Understanding the house dust mites (HDMs) microbiome is crucial due to its potential effects on the development of allergic diseases. In 1998, our laboratory collected Dermatophagoides farinae and D. pteronyssinus from beds in a Korean household and began cultivating these HDMs. Our laboratory has been actively investigating several topics about HDMs in recent years, including the bacterial and fungal microbiome and their interactions, as well as the impact of the HDM microbiome on airway inflammation. To study the D. farinae microbiome, we employed high-throughput sequencing of the 16S rDNA amplicons. The results revealed that the two most abundant bacteria were Enterococcus faecalis and Bartonella spp. In contrast, we found almost no bacteria in D. pteronyssinus. By inoculating bacteria to HDMs, we found that D. farinae is more susceptible to bacteria than D. pteronyssinus. This susceptibility was associated with the presence of certain fungal species in D. pteronyssinus. Additionally, we have recently made efforts to produce HDMs with reduced levels of symbiotic bacteria. We believe that standardizing and controlling the microbiome in HDMs are crucial steps for the future development and improvement of allergic immunotherapies.
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Affiliation(s)
| | | | | | - Ju Yeong Kim
- Department of Tropical Medicine, Institute of Tropical Medicine, Arthropods of Medical Importance Resource Bank, Yonsei University College of Medicine, Seoul, Republic of Korea
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4
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Rainyte J, Zvirblis G, Zaveckas M, Kucinskaite-Kodze I, Silimavicius L, Petraityte-Burneikiene R. Immunological comparison of recombinant shrimp allergen Pen m 4, produced in Pichia pastoris and Escherichia coli. J Biotechnol 2023; 369:1-13. [PMID: 37164269 DOI: 10.1016/j.jbiotec.2023.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 04/24/2023] [Accepted: 05/05/2023] [Indexed: 05/12/2023]
Abstract
Shellfish are a leading cause of allergies worldwide, affecting about one-tenth of the general population. The sarcoplasmic calcium-binding protein, also known as allergen Pen m 4, is an important factor in shrimp allergies. Our objective was to assess the most effective techniques for producing a recombinant Pen m 4 protein as a potential tool for diagnosing shrimp allergies. In this study, for the first time, we produced a functional recombinant Pen m 4 protein in a eukaryotic system, Pichia pastoris, and analyzed it against Escherichia coli-produced equivalents in enzyme-linked immunosorbent and reverse-phase protein microarray assays. A dual tag system based on the maltose-binding protein was successfully used to increase the yield of Pen m 4 by 1.3 to 2.3-fold in both bacteria and yeast, respectively. Immunological characterization showed that N-glycosylation is neither crucial for the folding of Pen m 4 nor its recognition by specific IgE. However, the Ca2+-depletion assay indicated a dependence on calcium ion presence in blood samples. Results demonstrate how a comparative analysis can elucidate essential allergen manufacturing points. In conclusion, E. coli-produced Pen m 4 protein fused with the maltose-binding protein should be the preferred option for further studies in Penaeus monodon allergy diagnostics.
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Affiliation(s)
- Juta Rainyte
- Vilnius University Life Sciences Center Institute of Biotechnology, Sauletekio av. 7, 10257 Vilnius, Lithuania.
| | - Gintautas Zvirblis
- Vilnius University Life Sciences Center Institute of Biotechnology, Sauletekio av. 7, 10257 Vilnius, Lithuania.
| | - Mindaugas Zaveckas
- Vilnius University Life Sciences Center Institute of Biotechnology, Sauletekio av. 7, 10257 Vilnius, Lithuania.
| | - Indre Kucinskaite-Kodze
- Vilnius University Life Sciences Center Institute of Biotechnology, Sauletekio av. 7, 10257 Vilnius, Lithuania.
| | - Laimis Silimavicius
- Vilnius University Life Sciences Center Institute of Biotechnology, Sauletekio av. 7, 10257 Vilnius, Lithuania; Imunodiagnostika Ltd., Moletu str. 16, 14260 Vilnius, Lithuania.
| | - Rasa Petraityte-Burneikiene
- Vilnius University Life Sciences Center Institute of Biotechnology, Sauletekio av. 7, 10257 Vilnius, Lithuania.
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5
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Abu El-Enin MA, Rabie Shehab El-Din EM, Abdelwahab HW, Abd El-Maksoud A, Abd El-Aziz AM, Shaaban MI, Attia AN, Aboukamar WA, Mohei-Aldin S, Belal F. Preparation of chemically stable allergen-specific sublingual immunotherapy from Egyptian allergens. J Clin Lab Anal 2022; 36:e24261. [PMID: 35150027 PMCID: PMC8906013 DOI: 10.1002/jcla.24261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 12/20/2021] [Accepted: 01/17/2022] [Indexed: 11/08/2022] Open
Abstract
BACKGROUND The term "allergen extracts" refers to solutions of proteins or glycoproteins extracted from source raw materials. OBJECTIVES This study was planned to prepare chemically stable sublingual immunotherapy from different allergens in Egypt. METHODS Allergen extraction from raw materials. The concentrated aqueous extract of each allergen was mixed with an equal volume of glycerol. The protein content of the preparations was determined using the modified Lowry assay method. The prepared allergens were stored for 9 months at 2-4°C. Samples were analyzed periodically (0, 3, 6, and 9 months of intervals) adopting the Lowry Assay method. Levels of specific IgE to Chenopodium album antigens were measured in patients' sera by ELISA. RESULTS The concentration of all prepared allergens, as indicated by the concentration of the protein content, was found to decrease exponentially with time, implying first-order kinetics of degradation. From the values of the slopes of the log plot for each allergen, the half-life time (t1/2 ) and (t1/4 ) values were calculated. The expiration date was considered as the time after which the allergen loses 25% of its potency. The obtained values of t1/4% vary according to the type of vaccine. The most stable one is that of Chenopodium album pollens (2.4 years) and the least stable is that of house dust Mites (9 months). The immunological characters of Chenopodium album extract were stable for at least 6 months. CONCLUSION Differences exist among allergen extracts made by multiple manufacturers. So, developments in studies on allergen preparation and characterization in a different locality are necessary.
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Affiliation(s)
- Mohammed A Abu El-Enin
- Department of Medicinal Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt.,Department of Medicinal Chemistry, Faculty of Pharmacy, National University of Science and Technology, Nasiria, Iraq
| | | | | | | | - Abeer M Abd El-Aziz
- Microbiology & Immunology Department, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Mona I Shaaban
- Microbiology & Immunology Department, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Ahmed Nader Attia
- Agronomy Department, Faculty of agriculture, Mansoura University, Mansoura, Egypt
| | - Wafaa A Aboukamar
- Department of medical parasitology, Faculty of medicine, Mansoura University, Mansoura, Egypt
| | - Sanaa Mohei-Aldin
- Microbiology & Immunology Department, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Fathalla Belal
- Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
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6
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Jeong KY, Lee J, Park KH, Lee JH, Park JW. Quantification of Que ac 1 and Standardization of Pollen Extract from Sawtooth Oak, the Most Important Cause of Spring Pollinosis in Korea. ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2021; 13:954-957. [PMID: 34734513 PMCID: PMC8569029 DOI: 10.4168/aair.2021.13.6.954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 05/15/2021] [Indexed: 11/20/2022]
Affiliation(s)
- Kyoung Yong Jeong
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea.,Prolagen, Seoul, Korea.
| | - Jongsun Lee
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Kyung Hee Park
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Jae-Hyun Lee
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Jung-Won Park
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea.,Prolagen, Seoul, Korea.
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Jeong KY, Park JW. Allergens of Regional Importance in Korea. FRONTIERS IN ALLERGY 2021; 2:652275. [PMID: 35386990 PMCID: PMC8974691 DOI: 10.3389/falgy.2021.652275] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 02/17/2021] [Indexed: 11/13/2022] Open
Abstract
Allergen repertoire should reflect the region's climate, flora, and dining culture to allow for a better diagnosis. In Korea, tree pollens of oak and birch in the spring in conjunction with weed pollens of mugwort, ragweed, and Japanese hop are the main causes of seasonal allergic rhinitis. More specifically, the sawtooth oak in Korea and the Japanese hop in East Asia make a difference from western countries. Among food allergens, the sensitization to silkworm pupa and buckwheat is also common in Korean patients. Honey bee venom due to apitherapy in traditional medicine and Asian needle ant, Pachycondyla chinensis, are important causes of anaphylaxis in Korea. Climate change, frequent overseas traveling, and international product exchanges make situations more complicated. Ragweed, for example, was not native to Korea, but invaded the country in the early 1950s. Recently, Japanese hop and Asian needle ants have been recognized as important invasive ecosystem disturbing species in western countries. However, the molecular properties of the component allergens from these unique culprit allergens have been poorly characterized. The present review summarizes the molecular studies on the allergens of regional importance in Korea.
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8
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Kim JT, Lee J, Yuk JE, Song H, Kim H, Kim SH, Kim DJ, Shin Y, Lee DC, Jeong KY, Park JW. Novel Sensitive, Two-site ELISA for the Quantification of Der f 1 Using Monoclonal Antibodies. ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2021; 13:665-667. [PMID: 34212552 PMCID: PMC8255357 DOI: 10.4168/aair.2021.13.4.665] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 10/15/2020] [Accepted: 10/26/2020] [Indexed: 11/20/2022]
Affiliation(s)
- Ji Tae Kim
- Prolagen, Seoul, Korea.,Department of Biomedical Technology, Kangwon National University, Chuncheon, Korea
| | - Jongsun Lee
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Jie Eun Yuk
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Hangyeol Song
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | | | | | | | | | - Deug Chan Lee
- Department of Biomedical Technology, Kangwon National University, Chuncheon, Korea
| | - Kyoung Yong Jeong
- Prolagen, Seoul, Korea.,Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea.
| | - Jung Won Park
- Prolagen, Seoul, Korea.,Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea.
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9
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Kim JT, Kim H, Kim SH, Kim DJ, Shin Y, Kim JD, Song H, Jang SW, Lee DC, Park KH, Lee JH, Jeong KY, Park JW. Comparison of Allergenic Properties among Commercially Available House Dust Mite Allergen Extracts in Korea. Yonsei Med J 2021; 62:86-90. [PMID: 33381938 PMCID: PMC7820445 DOI: 10.3349/ymj.2021.62.1.86] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 09/16/2020] [Accepted: 10/06/2020] [Indexed: 12/04/2022] Open
Abstract
Precise allergy diagnosis and effective allergen specific immunotherapy are largely dependent on the quality of allergen extract. A new extract of Dermatophagoides farinae was commercially developed by Prolagen. The allergenic properties of the new extract were compared with those of other commercial products. The allergenic properties of the new extract were compared according to protein concentration, protein profiles, major allergen (Der f 1) contents, and allergenic potency to those for three commercially available extracts imported in Korea (Jubilant HollisterStier Allergy, Lofarma S.p.A., and Stallergenes Greer). Protein concentrations varied up to 2.62-fold (0.404 to 1.057 mg/mL), and Der f 1 contents varied up to 11.3-fold (3.597 to 40.688 μg/mL). Protein profiles of the extracts showed no major discrepancies, although there were some differences in SDS-PAGE band intensities, reflecting protein concentrations. Allergen potency ranged from 37038 to 60491 PAU/mL. The Prolagen product was highest in terms of protein concentration and allergen potency. The Lofarma product displayed Der f 1 content similar to that in Prolagen (19.4 μg/mg vs. 19.3 μg/mg). Endotoxin levels varied 8.9-fold (1020 to 8985 EU/mL). The newly developed house dust mite extract showed equal or better allergenic properties than available commercial extracts. This new product may be useful for better diagnostics and allergen-specific immunotherapeutics.
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Affiliation(s)
- Ji Tae Kim
- Prolagen, Seoul, Korea
- Department of Biomedical Technology, Kangwon National University, Chuncheon, Korea
| | | | | | | | | | | | - Hangyeol Song
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Seok Woo Jang
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
- Brain Korea 21 PLUS Project for Medicine Science, Yonsei University, Seoul, Korea
| | - Deug Chan Lee
- Department of Biomedical Technology, Kangwon National University, Chuncheon, Korea
| | - Kyung Hee Park
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Jae Hyun Lee
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Kyoung Yong Jeong
- Prolagen, Seoul, Korea
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea.
| | - Jung Won Park
- Prolagen, Seoul, Korea
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea.
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Jensen‐Jarolim E, Bachmann MF, Bonini S, Jacobsen L, Jutel M, Klimek L, Mahler V, Mösges R, Moingeon P, O´Hehir RE, Palomares O, Pfaar O, Renz H, Rhyner C, Roth‐Walter F, Rudenko M, Savolainen J, Schmidt‐Weber CB, Traidl‐Hoffmann C, Kündig T. State-of-the-art in marketed adjuvants and formulations in Allergen Immunotherapy: A position paper of the European Academy of Allergy and Clinical Immunology (EAACI). Allergy 2020; 75:746-760. [PMID: 31774179 DOI: 10.1111/all.14134] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 11/07/2019] [Accepted: 11/10/2019] [Indexed: 02/06/2023]
Abstract
Since the introduction of allergen immunotherapy (AIT) over 100 years ago, focus has been on standardization of allergen extracts, with reliable molecular composition of allergens receiving the highest attention. While adjuvants play a major role in European AIT, they have been less well studied. In this Position Paper, we summarize current unmet needs of adjuvants in AIT citing current evidence. Four adjuvants are used in products marketed in Europe: aluminium hydroxide (Al(OH)3 ) is the most frequently used adjuvant, with microcrystalline tyrosine (MCT), monophosphoryl lipid A (MPLA) and calcium phosphate (CaP) used less frequently. Recent studies on humans, and using mouse models, have characterized in part the mechanisms of action of adjuvants on pre-existing immune responses. AIT differs from prophylactic vaccines that provoke immunity to infectious agents, as in allergy the patient is presensitized to the antigen. The intended mode of action of adjuvants is to simultaneously enhance the immunogenicity of the allergen, while precipitating the allergen at the injection site to reduce the risk of anaphylaxis. Contrasting immune effects are seen with different adjuvants. Aluminium hydroxide initially boosts Th2 responses, while the other adjuvants utilized in AIT redirect the Th2 immune response towards Th1 immunity. After varying lengths of time, each of the adjuvants supports tolerance. Further studies of the mechanisms of action of adjuvants may advise shorter treatment periods than the current three-to-five-year regimens, enhancing patient adherence. Improved lead compounds from the adjuvant pipeline are under development and are explored for their capacity to fill this unmet need.
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Affiliation(s)
- Erika Jensen‐Jarolim
- Institute of Pathophysiology & Allergy Research Center of Pathophysiology, Infectiology and Immunology Medical University of Vienna Vienna Austria
- The Interuniversity Messerli Research Institute University of Veterinary Medicine Vienna Medical University of Vienna University of Vienna Vienna Austria
| | - Martin F. Bachmann
- Institute of Immunology Inselspital University of Berne Bern Switzerland
| | - Sergio Bonini
- Institute of Translational Pharmacology Italian National Research Council Rome Italy
| | - Lars Jacobsen
- ALC, Allergy Learning & Consulting Copenhagen Denmark
| | - Marek Jutel
- Department of Clinical Immunology Wroclaw Medical University Wrocław Poland
- ALL‐MED Medical Research Institute Wroclaw Poland
| | - Ludger Klimek
- Center of Rhinology and Allergology Wiesbaden Germany
| | - Vera Mahler
- Division of Allergology Paul‐Ehrlich‐Institut Federal Institute for Vaccines and Biomedicines Langen Germany
| | - Ralph Mösges
- CRI‐Clinical Research International Ltd Hamburg Germany
- Institute of Medical Statistics and Bioinformatics University of Cologne Cologne Germany
| | - Philippe Moingeon
- Center for Therapeutic Innovation – Immuno‐Inflammatory Disease Servier Suresnes France
| | - Robyn E. O´Hehir
- Department of Respiratory Medicine, Allergy and Clinical Immunology (Research) Central Clinical School Monash University and Alfred Hospital Melbourne Vic. Australia
| | - Oscar Palomares
- Department of Biochemistry and Molecular Biology Chemistry School Complutense University of Madrid Madrid Spain
| | - Oliver Pfaar
- Department of Otorhinolaryngology, Head and Neck Surgery Section of Rhinology and Allergy University Hospital MarburgPhilipps‐Universität Marburg Marburg Germany
| | - Harald Renz
- Institute of Laboratory Medicine Universities of Giessen and Marburg Lung Center (UGMLC) German Center for Lung Research (DZL) Philipps Universität Marburg Marburg Germany
| | - Claudio Rhyner
- SIAF – Swiss Institute of Allergy and Asthma Research Davos Switzerland
| | - Franziska Roth‐Walter
- The Interuniversity Messerli Research Institute University of Veterinary Medicine Vienna Medical University of Vienna University of Vienna Vienna Austria
| | | | - Johannes Savolainen
- Department of Pulmonary Diseases and Clinical Allergology University of Turku and Turku University Hospital Turku Finland
| | - Carsten B. Schmidt‐Weber
- Center of Allergy and Environment (ZAUM) German Center of Lung Research (DZL) and Helmholtz I&I Initiative Technical University, and Helmholtz Center Munich Munich Germany
| | - Claudia Traidl‐Hoffmann
- Institute of Environmental Medicine (IEM) Technical University Munich and Helmholtz Center Munich Munich Germany
| | - Thomas Kündig
- Department of Dermatology University Hospital Zurich Zurich Switzerland
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11
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Derakhshani A, F. KK, Barzegari Banadkoki S, Shirazi FH, Barati M, Fereidouni M, Safarpour H. Optimization of induction parameters, structure quality assessment by ATR-FTIR and in silico characterization of expressed recombinant polcalcin in three different strains of Escherichia coli. Int J Biol Macromol 2019; 138:97-105. [DOI: 10.1016/j.ijbiomac.2019.07.078] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 07/10/2019] [Accepted: 07/10/2019] [Indexed: 12/21/2022]
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12
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Joo Chan C, Richardo T, Lim RLH. Current Trend in Immunotherapy for Peanut Allergy. Int Rev Immunol 2019; 37:279-290. [DOI: 10.1080/08830185.2018.1509967] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Chong Joo Chan
- Department of Biotechnology, Faculty of Applied Sciences, UCSI University, Cheras, Kuala Lumpur, Malaysia
| | - Timmy Richardo
- Department of Biomedicine, Indonesia International Institute for Life Sciences (i3L), Jakarta, Indonesia
| | - Renee Lay Hong Lim
- Department of Biotechnology, Faculty of Applied Sciences, UCSI University, Cheras, Kuala Lumpur, Malaysia
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13
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Characterization of narrow-leaf lupin (Lupinus angustifolius L.) recombinant major allergen IgE-binding proteins and the natural β-conglutin counterparts in sweet lupin seed species. Food Chem 2018; 244:60-70. [DOI: 10.1016/j.foodchem.2017.10.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 09/14/2017] [Accepted: 10/05/2017] [Indexed: 11/22/2022]
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14
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Lee SC, Sim DW, Lee J, Jeong KY, Park KH, Lee JH, Kim JD, Park JW. Comparison between Newly Developed and Commercial Inhalant Skin Prick Test Reagents Using In Vivo and In Vitro Methods. J Korean Med Sci 2018; 33:e101. [PMID: 29573248 PMCID: PMC5865053 DOI: 10.3346/jkms.2018.33.e101] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Accepted: 01/19/2018] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND We developed skin prick test (SPT) reagents for common inhalant allergens that reflected the real exposure in Korea. The study aim was to evaluate diagnostic usefulness and allergen potency of our inhalant SPT reagents in comparison with commercial products. METHODS We produced eight common inhalant allergen SPT reagents using total extract (Prolagen): Dermatophagoides farinae, Dermatophagoides pteronyssinus, oak, ragweed, mugwort, Humulus japonicus pollens, as well as cat and dog allergens. We compared the newly developed reagents with three commercially available SPT reagents (Allergopharma, Hollister-Stier, Lofarma). We measured total protein concentrations, sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE), major allergen concentration, and biological allergen potencies measured by immunoglobulin E (IgE) immunoblotting and ImmunoCAP inhibition test. RESULTS Diagnostic values of these SPT reagents were expressed as positivity rate and concordance rate of the results from ImmunoCAP allergen-specific IgE test in 94 allergic patients. In vitro analysis showed marked differences in protein concentrations, SDS-PAGE features, major allergen concentrations, and biological allergen potencies of four different SPT reagents. In vivo analysis showed that positive rates and concordance rates of Prolagen® SPT reagents were similar compared to the three commercial SPT reagents. CONCLUSION The newly developed Prolagen® inhalant SPT reagents are not inferior to the commercially available SPT reagents in allergy diagnosis.
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Affiliation(s)
- Sang Chul Lee
- Division of Allergy and Immunology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
- Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Da Woon Sim
- Division of Allergy, Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea
| | - Jongsun Lee
- Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Kyoung Yong Jeong
- Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Kyung Hee Park
- Division of Allergy and Immunology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
- Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Jae Hyun Lee
- Division of Allergy and Immunology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
- Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | | | - Jung Won Park
- Division of Allergy and Immunology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
- Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
- Prolagen, Seoul, Korea.
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15
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Jeong KY, Park KH, Lee JH, Park JW. Monoclonal Antibodies to Recombinant Fag e 3 Buckwheat Allergen and Development of a Two-site ELISA for Its Quantification. ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2017; 9:417-422. [PMID: 28677355 PMCID: PMC5500696 DOI: 10.4168/aair.2017.9.5.417] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 03/13/2017] [Accepted: 03/14/2017] [Indexed: 01/13/2023]
Abstract
Purpose Buckwheat is a major cause of anaphylaxis, and Fag e 3 is the key major allergen in buckwheat. However, an immunoassay system for the quantification of Fag e 3 has yet to be developed. Methods We developed a 2-site enzyme-linked immunosorbent assay (ELISA) using monoclonal antibodies (mAbs) produced against recombinant Fag e 3. We applied this ELISA to quantify native Fag e 3 in total buckwheat extract. Results Four clones of mAbs were produced, and all recognized vicilin allergens not only from buckwheat, but also from peanut and walnut. However, the ELISA using these antibodies was only able to quantify Fag e 3 in the total extract after addition of 1% sodium dodecyl sulphate (SDS) and heating, which facilitated dissociation of the allergen. The detection limit of the developed 2-site ELISA was 0.8 µg/mL. The measurement of Fag e 3 in the total extract of buckwheat showed that approximately 12% of protein in total buckwheat extract was Fag e 3. Conclusions We have developed an ELISA system for the quantification of the group 3 buckwheat allergen, Fag e 3, specifically. This assay will be useful for standardization of buckwheat allergens and monitoring of buckwheat contamination in foods.
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Affiliation(s)
- Kyoung Yong Jeong
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Kyung Hee Park
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Jae Hyun Lee
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Jung Won Park
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea.
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Patel S, Meher B. A review on emerging frontiers of house dust mite and cockroach allergy research. Allergol Immunopathol (Madr) 2016; 44:580-593. [PMID: 26994963 DOI: 10.1016/j.aller.2015.11.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2015] [Accepted: 11/16/2015] [Indexed: 12/28/2022]
Abstract
Currently, mankind is afflicted with diversified health issues, allergies being a common, yet little understood malady. Allergies, the outcome of a baffled immune system encompasses myriad allergens and causes an array of health consequences, ranging from transient to recurrent and mild to fatal. Indoor allergy is a serious hypersensitivity in genetically-predisposed people, triggered by ingestion, inhalation or mere contact of allergens, of which mite and cockroaches are one of the most-represented constituents. Arduous to eliminate, these aeroallergens pose constant health challenges, mostly manifested as respiratory and dermatological inflammations, leading to further aggravations if unrestrained. Recent times have seen an unprecedented endeavour to understand the conformation of these allergens, their immune manipulative ploys and other underlying causes of pathogenesis, most importantly therapies. Yet a large section of vulnerable people is ignorant of these innocuous-looking immune irritants, prevailing around them, and continues to suffer. This review aims to expedite this field by a concise, informative account of seminal findings in the past few years, with particular emphasis on leading frontiers like genome-wide association studies (GWAS), epitope mapping, metabolomics etc. Drawbacks linked to current approaches and solutions to overcome them have been proposed.
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Jeong KY, Son M, Park JH, Park KH, Park HJ, Lee JH, Hong CS, Park JW. Cross-Reactivity between Oak and Birch Pollens in Korean Tree Pollinosis. J Korean Med Sci 2016; 31:1202-7. [PMID: 27478329 PMCID: PMC4951548 DOI: 10.3346/jkms.2016.31.8.1202] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Accepted: 04/10/2016] [Indexed: 11/20/2022] Open
Abstract
Oak and birch trees belong to Fagales order. Specific IgE to pollen allergens of both trees are frequently found in Korea pollinosis patients. Oak trees which comprise 40% of forest area are common in Korea. However, birch trees are sparse. We compared the allergenicity of pollen extracts of white oak, sawtooth and Mongolian oaks which are prevalent species in Korea, with the pollen extract of birch. The cross-reactivity of four pollen extracts was examined with pooled sera of 12 patients by ELISA, immunoblotting and CAP inhibitions. A protein of 17 kDa, putatively homologous to a major birch allergen Bet v 1, displayed strong IgE reactivity from white oak and sawtooth oak pollen extract but not from Mongolian oak pollen. Notably, a 23-kDa protein from sawtooth and white oaks showed strong IgE reactivity and inhibited by Bet v 1. IgE binding to white oak was inhibited a maximum of 94.6% by white oak, 93.4% by sawtooth oak, 83.2% by Mongolian oak, and 68.8% by birch. Furthermore, sawtooth oak, white oak, and Mongolian oak extracts were able to inhibit up to 78.5%, 76.6% and 67.3% of IgE binding to birch extract, while birch extract itself inhibited up to 94.3%. Specific IgE to Bet v 1 was inhibited a maximum of 79.1% by sawtooth oak, 77.4% by white oak, and 72.7% by Mongolian oak, while 81.5% inhibition was shown by birch. Bet v 1 was able to partially inhibit its homologous molecules from sawtooth oak and white oak in immunoblotting. Birch pollen extract was found to be cross-reactive primarily with Bet v 1-homologous allergen from oak pollens in Korea pollinosis patients. Considering the sparseness of birch tree in Korea, oak, especially sawtooth oak may be the main cause of tree pollinosis in Korea, rather than birch.
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Affiliation(s)
- Kyoung Yong Jeong
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Mina Son
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Jin Hee Park
- Department of Biology Education, Faculty of Education, Seowon University, Cheongju, Korea
| | - Kyung Hee Park
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Hye Jung Park
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Jae-Hyun Lee
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Chein-Soo Hong
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Jung-Won Park
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
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Zimmer J, Vieths S, Kaul S. Standardization and Regulation of Allergen Products in the European Union. Curr Allergy Asthma Rep 2016; 16:21. [PMID: 26874849 DOI: 10.1007/s11882-016-0599-4] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Product-specific standardization is of prime importance to ensure persistent quality, safety, and efficacy of allergen products. The regulatory framework in the EU has induced great advancements in the field in the last years although national implementation still remains heterogeneous. Scores of methods for quantification of individual allergen molecules are developed each year and also the challenging characterization of chemically modified allergen products is progressing. However, despite the unquestionable increase in knowledge and the subsequent improvements in control of quality parameters of allergen products, an important aim has not been reached yet, namely cross-product comparability. Still, comparison of allergen product potency, either based on total allergenic activity or individual allergen molecule content, is not possible due to a lack of standard reference preparations in conjunction with validated standard methods. This review aims at presenting the most recent developments in product-specific standardization as well as activities to facilitate cross-product comparability in the EU.
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Affiliation(s)
- Julia Zimmer
- Division of Allergology, Paul-Ehrlich-Institut, Paul-Ehrlich-Str. 51-59, 63225, Langen, Germany.
| | - Stefan Vieths
- Division of Allergology, Paul-Ehrlich-Institut, Paul-Ehrlich-Str. 51-59, 63225, Langen, Germany.
| | - Susanne Kaul
- Division of Allergology, Paul-Ehrlich-Institut, Paul-Ehrlich-Str. 51-59, 63225, Langen, Germany.
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Passalacqua G, Sastre J, Pfaar O, Wahn U, Demoly P. Comparison of allergenic extracts from different origins: the value of the FDA's bioequivalent allergy unit (BAU). Expert Rev Clin Immunol 2016; 12:733-9. [PMID: 27215895 DOI: 10.1080/1744666x.2016.1187561] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
INTRODUCTION Allergy immunotherapy (AIT) is the only disease-modifying intervention for the treatment of allergic diseases. The clinical effectiveness of AIT is clearly dose-dependent, so it is important that clinicians can assess and compare the potency of the various products available. However, this is not possible in practice, because manufacturers use different methods to determine potency. Therefore, a clear need exists for adoption of a 'gold-standard' measure of allergenicity. The bioequivalent allergy unit (BAU) is thus far the only allergen unit approved by a regulatory agency (the US Food and Drug Administration), with European regulatory authorities yet to adopt a common unit. AREAS COVERED Using PubMed, we performed a review of the literature on measures of allergen extract potency, use of the BAU, and BAU assessment for grass pollen tablets. Expert commentary: There is an obvious benefit to allergists and patients for having a single, comparable unit across products, and we strongly support the adoption of a single, 'gold-standard' unit of measurement for all products. Use of the BAU allows a clear comparison of the potency of allergen products from different manufacturers, and enables better understanding of the potential reasons for any differences in administration and dosing protocols between these products.
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Affiliation(s)
- Giovanni Passalacqua
- a Allergy and Respiratory Diseases, IRCCS San Martino-IST , University of Genoa , Genoa , Italy
| | - Joaquín Sastre
- b Allergy Division, Fundación Jimenez Díaz, CIBER of Respiratory Diseases, Institute Carlos III , Universidad Autónoma de Madrid , Madrid , Spain
| | - Oliver Pfaar
- c Center for Rhinology and Allergology , Wiesbaden , Germany.,d Department of Otorhinolaryngology, Head and Neck Surgery, Medical Faculty Mannheim , Universitätsmedizin Mannheim, Heidelberg University , Mannheim , Germany
| | - Ulrich Wahn
- e Department of Paediatric Pulmonology and Immunology, Charité Virchow-Klinikum , Humboldt University , Berlin , Germany
| | - Pascal Demoly
- f Department of Pulmonology, Division of Allergy , Hôpital Arnaud de Villeneuve, University Hospital of Montpellier, Montpellier and Sorbonne Universities , UPMC Paris 06, UMR-S 1136, IPLESP, Equipe EPAR, Paris , France
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Jeong KY, Son M, Choi SY, Park KH, Park HJ, Hong CS, Lee JH, Park JW. Standardization of Weed Pollen Extracts, Japanese Hop and Mugwort, in Korea. Yonsei Med J 2016; 57:399-406. [PMID: 26847293 PMCID: PMC4740533 DOI: 10.3349/ymj.2016.57.2.399] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Revised: 07/24/2015] [Accepted: 08/10/2015] [Indexed: 11/27/2022] Open
Abstract
PURPOSE Japanese hop (Humulus spp.) and mugwort (Artemisia spp.) are notable causes of autumn pollinosis in East Asia. However, Japanese hop and mugwort pollen extracts, which are widely used for the diagnosis, have not been standardized. This study was performed to standardize Japanese hop and mugwort pollen extracts. MATERIALS AND METHODS Allergen extracts were prepared in a standardized way using locally collected Humulus japonicus and purchased Artemisia vulgaris pollens. The immunoglobulin E (IgE) reactivities of prepared extracts were compared with commercial extracts via IgE immunoblotting and inhibition analyses. Intradermal skin tests were performed to determine the bioequivalent allergy unit (BAU). RESULTS The IgE reactive components of the extracts via IgE immunoblotting were similar to those of commercial extracts. A 11-kDa allergen showed the strongest IgE reactivity in Japanese hop, as did a 28-kDa allergen in mugwort pollen extracts. Allergenic potencies of the investigatory Japanese hop and mugwort extracts were essentially indistinguishable from the commercial ones. Sums of erythema of 50 mm by the intradermal skin test (ΣED50) were calculated to be 14.4th and 13.6th three-fold dilutions for Japanese hop and mugwort extracts, respectively. Therefore, the allergenic activity of the prepared extracts was 90827.4 BAU/mg for Japanese hop and 34412 BAU/mg for mugwort. CONCLUSION We produced Japanese hop and mugwort pollen extracts using a standardized method. Standardized Japanese hop and mugwort pollen extracts will facilitate the production of improved diagnostic and immunotherapeutic reagents.
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Affiliation(s)
- Kyoung Yong Jeong
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Mina Son
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Soo Young Choi
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Kyung Hee Park
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Hye Jung Park
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Chein Soo Hong
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Jae Hyun Lee
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Jung Won Park
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea.
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Lew MH, Lim RLH. Expression of a codon-optimised recombinant Ara h 2.02 peanut allergen in Escherichia coli. Appl Microbiol Biotechnol 2015; 100:661-71. [DOI: 10.1007/s00253-015-6953-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Revised: 08/12/2015] [Accepted: 08/22/2015] [Indexed: 10/23/2022]
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Park KH, Son M, Choi SY, Park HJ, Lee JH, Jeong KY, Lee JS, Park JW. In vitro evaluation of allergen potencies of commercial house dust mite sublingual immunotherapy reagents. ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2014; 7:124-9. [PMID: 25729619 PMCID: PMC4341333 DOI: 10.4168/aair.2015.7.2.124] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Revised: 03/19/2014] [Accepted: 05/15/2014] [Indexed: 11/20/2022]
Abstract
Purpose The clinical efficacy of allergen-immunotherapy is known to be dose dependent. However, optimal maintenance dosage has not yet been determined for sublingual immunotherapy (SLIT). Furthermore, since companies adopt their own units for expression of allergenicity, the allergen concentrations of individual reagents cannot be compared easily. We sought to measure and compare the allergenicities of 3 commercially available house dust mite (HDM) SLIT regents and a subcutaneous immunotherapy reagent. Methods We measured the HDM allergenic potency of the maintenance dosages of three SLIT reagents: Staloral® (300 index of reactivity [IR] /mL, recommended maintenance dosage [MD]: 120 IR), SLITone® (1,000 standard therapeutic unit [STU]/mL, recommended MD: 200 STU), Wolwopharma® (100 µg/mL, recommended MD: 20 µg), and subcutaneous immunotherapy regents of Hollister-Stier (10,000 allergy unit [AU] /mL). The allergenic potency was assessed by measuring the total protein concentrations, mite group 1 and 2 allergens using 2-site ELISA, and an inhibition test against IgE specific to Dermatophagoides farinae and Dermatophagoides pteronyssinus. Results The protein content of the Wolwopharma® reagent was 1.5-261.4 times higher than that of the other 2 SLIT reagents. The concentration of group 1 major allergens in Staloral® (132.03 µg/mL) was 33- to 44.5-fold higher than in SLITone® (4.00 µg/mL) and Wolwopharma® (2.97 µg/mL). The concentration of group 2 major allergen was also 8.9- to 10.5-fold higher in Staloral® (15.7 µg/mL) than in SLITone® (1.8 µg/mL) or Wolwopharma® (1.5 µg/mL). An ELISA inhibition study against HDM-specific IgE showed that the allergen potency of Staloral® reagent is 8.5-fold and 21-fold higher than that of SLITone® or Wolwopharma®, respectively. The differences between the maintenance dosages are further exaggerated by the differences in the recommended volumes of SLIT reagents. Conclusions The allergen potencies of commercially available HDM SLIT reagents are markedly different. Consensus regarding the optimal allergen concentration for SLIT reagents used to treat HDM respiratory allergies is needed.
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Affiliation(s)
- Kyung Hee Park
- Department of Internal Medicine and Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Mina Son
- Department of Internal Medicine and Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Soo-Young Choi
- Department of Internal Medicine and Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Hey Jung Park
- Department of Internal Medicine and Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Jae-Hyun Lee
- Department of Internal Medicine and Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Kyoung Yong Jeong
- Department of Internal Medicine and Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Joo-Shil Lee
- Center for Immunology and Pathology, Korea National Institute of Health, Osong, Korea
| | - Jung-Won Park
- Department of Internal Medicine and Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
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Abstract
Presently, allergy diagnosis and therapy procedures are undergoing a transition phase in which allergen extracts are being step-by-step replaced by molecule-based products. The new developments will allow clinicians to obtain detailed information on sensitization patterns, more accurate interpretation of allergic symptoms, and thus improved patients' management. In this respect, recombinant technology has been applied to develop this new generation of molecule-based allergy products. The use of recombinant allergens allows full validation of identity, quantity, homogeneity, structure, aggregation, solubility, stability, IgE-binding and the biologic potency of the products. In contrast, such parameters are extremely difficult to assay and standardize for extract-based products. In addition to the possibility of bulk production of wild type molecules for diagnostic purposes, recombinant technology opened the possibility of developing safer and more efficacious products for allergy therapy. A number of molecule-based hypoallergenic preparations have already been successfully evaluated in clinical trials, bringing forward the next generation of allergy vaccines. In this contribution, we review the latest developments in allergen characterization, molecule-based allergy diagnosis, and the application of recombinant allergens in therapeutic setups. A comprehensive overview of clinical trials using recombinant allergens as well as synthetic peptides is presented.
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Affiliation(s)
- Fatima Ferreira
- Christian Doppler Laboratory for Allergy Diagnosis and Therapy, Department of Molecular Biology, University of Salzburg, Salzburg, Austria.
| | - Martin Wolf
- Christian Doppler Laboratory for Allergy Diagnosis and Therapy, Department of Molecular Biology, University of Salzburg, Salzburg, Austria
| | - Michael Wallner
- Christian Doppler Laboratory for Allergy Diagnosis and Therapy, Department of Molecular Biology, University of Salzburg, Salzburg, Austria
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Kespohl S, Maryska S, Zahradnik E, Sander I, Brüning T, Raulf-Heimsoth M. Biochemical and immunological analysis of mould skin prick test solution: current status of standardization. Clin Exp Allergy 2014; 43:1286-96. [PMID: 24152161 DOI: 10.1111/cea.12186] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2013] [Revised: 08/01/2013] [Accepted: 08/14/2013] [Indexed: 11/28/2022]
Abstract
BACKGROUND Sensitization prevalence to moulds reached from less than 10% in the general population to more than 25% in atopic and/or asthmatic subjects. To diagnose IgE-mediated mould sensitization, skin prick test (SPT) and specific IgE (sIgE) measurement are recommended. However, concordance of SPT and sIgE results is often less than 50% and standardization of the extracts is required to achieve reliable test results. OBJECTIVE The aim of our study was to analyse mould SPT solutions (SPTs) with respect to quantity and quality of protein, antigen and human IgE-binding content as a prerequisite for further in vivo studies. METHODS Commercial SPTs of Alternaria alternata, Aspergillus fumigatus, Cladosporium herbarum and Penicillium chrysogenum from six manufacturers as well as two in-house extracts from Aspergillus versicolor were investigated. Protein-, antigen- and IgE-binding contents were quantified by Bradford assay, sandwich ELISA and IgE-ImmunoCAP-inhibition tests. Protein composition and IgE and IgG binding were analysed by SDS-PAGE and immunoblotting, respectively. RESULTS Median protein concentrations were similar in all mould SPT extracts (90-110 μg/mL). In contrast, antigen contents and IgE-binding capacity showed a high variability with median antigen values from 4 to 118 μg/mL and IgE inhibition results between 30 to 95%. Whereas almost all SPTs of A. alternata and A. versicolor showed complete sIgE inhibition with mean values > 80%, only three extracts for A. fumigatus, two extracts for C. herbarum and none of the tested extracts for P. chrysogenum exceeded 50% sIgE reduction. Quantitative amounts of protein, antigenic and IgE-binding structures were not comparable with the quality of the corresponding protein or immunoblot pattern, with the exception of A. alternata SPTs. CONCLUSIONS AND CLINICAL RELEVANCE Commercially available mould SPT extracts showed high variability raising the question of comparability and reliability of SPT results. Possible consequences for diagnostic test outcome will be investigated in the next step.
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Affiliation(s)
- S Kespohl
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-Universität Bochum (IPA), Bochum, Germany
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Jeong KY, Lee JH, Kim EJ, Lee JS, Cho SH, Hong SJ, Park JW. Current status of standardization of inhalant allergen extracts in Korea. ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2014; 6:196-200. [PMID: 24843793 PMCID: PMC4021236 DOI: 10.4168/aair.2014.6.3.196] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Accepted: 12/02/2013] [Indexed: 11/20/2022]
Abstract
Allergy diagnosis and immunotherapy in Korea rely mostly on imported allergen extracts. However, some allergens that are not important in Western countries are not commercially available, and even the same species of allergen source often displays differences in allergenicity due to amino acid sequence polymorphisms. Therefore, it is essential to prepare allergen extracts that reflect regional characteristics. Allergen standardization has been performed since 2009 with the support of the Korea Center for Disease Control and Prevention. Here, we summarize the current status of allergen standardization, focusing on the house dust mite and cockroach. Pollen allergens that are under investigation are also briefly described.
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Affiliation(s)
- Kyoung Yong Jeong
- Department of Internal Medicine and Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Jae-Hyun Lee
- Department of Internal Medicine and Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Eun-Jin Kim
- Center for Immunology and Pathology, Korea National Institute of Health, Osong, Cheongwon, Korea
| | - Joo-Shil Lee
- Center for Immunology and Pathology, Korea National Institute of Health, Osong, Cheongwon, Korea
| | - Sang-Heon Cho
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Soo-Jong Hong
- Department of Pediatrics, Childhood Asthma Atopy Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jung-Won Park
- Department of Internal Medicine and Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
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Park HJ, Lee JH, Park KH, Ann HW, Jin MN, Choi SY, Lee YW, Hong CS, Park JW. A nationwide survey of inhalant allergens sensitization and levels of indoor major allergens in Korea. ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2014; 6:222-7. [PMID: 24843797 PMCID: PMC4021240 DOI: 10.4168/aair.2014.6.3.222] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Revised: 09/02/2013] [Accepted: 09/03/2013] [Indexed: 11/20/2022]
Abstract
PURPOSE The higher prevalence of respiratory allergic disease may be due to increased exposure to inhalation allergens. We conducted a survey of allergic diseases in autumn and winter with detection of major indoor allergens in major cities in Korea. METHODS We enrolled 110 subjects from the fourth Korea National Health and Nutrition Examination Survey with stratified, cluster, and systematic sampling procedures. All participants answered a health questionnaire as well as underwent a skin prick test (SPT) and ImmunoCAP for 11 indoor major allergens. We also measured the levels of 5 major allergens (Der f 1, Der p 1, Can f 1, Bla g 1, and Asp f 1) in fine indoor dust from the houses of 60 subjects with a 2-site ELISA. RESULTS The prevalence of allergic rhinitis and asthma were 25.5% and 7.3%, respectively. The most common sensitized allergens identified by SPT and ImmunoCAP were Dermatophagoides farinae (40.9%, 36.8%), followed by cockroach (23.6%, 19.5%), mugwort (13.6%, 22.9%), oak (9.1%, 22.9%), Japanese hop (9.1%, 8.6%), and dog dander (8.2%, 6.9%). There was a modest discrepancy between SPT and ImmunoCAP. Der f 1 and Der p 1 were detected in 91.7% and 45.0% of the enrolled houses, respectively. Der f 1 indicated high concentrations in all specific provinces in Korea; however, Der p 1 measured high only in the south. Dog dander allergens were present in 71.7% of houses; however, Bla g 1 was present in only 11.7% of houses and Asp f 1 was not detected in any houses. CONCLUSIONS The most important inhalant allergens in Korea are house dust mites followed by cockroach, mugwort, oak, Japanese hop, and dog dander in indoor environment, in which The dominant species of house dust mites were different according to region.
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Affiliation(s)
- Hye Jung Park
- Division of Allergy and Immunology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea. ; Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Jae-Hyun Lee
- Division of Allergy and Immunology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea. ; Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Kyung Hee Park
- Division of Allergy and Immunology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea. ; Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Hea Won Ann
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Moo-Nyun Jin
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Soo-Young Choi
- Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Yong-Won Lee
- Division of Allergy and Immunology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea. ; Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Chein-Soo Hong
- Division of Allergy and Immunology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea. ; Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Jung-Won Park
- Division of Allergy and Immunology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea. ; Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
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Jeong KY, Choi SY, Han IS, Lee JH, Lee JS, Hong CS, Park JW. The effects of storage conditions on the stability of house dust mite extracts. ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2013; 5:397-401. [PMID: 24179687 PMCID: PMC3810547 DOI: 10.4168/aair.2013.5.6.397] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Revised: 01/25/2013] [Accepted: 01/31/2013] [Indexed: 11/20/2022]
Abstract
Purpose Allergen extracts from the house dust mite (HDM, Dermatophagoides pteronyssinus) are widely utilized for diagnosis and treatment of allergic diseases. It is known that allergen extracts degrade and lose potency when stored over time. Methods This study aimed to determine the optimal conditions for stability of allergen extracts. This study was undertaken to investigate the optimal storage conditions for HDM extracts, the effects of adding 0.03% human serum albumin (HSA) and 50% glycerol were evaluated at -20℃, 4℃, and room temperature (RT). Changes in protein and group 1 major allergen (Der p 1) concentration, as well as allergenicity were measured over a 1 year period using the Bradford assay, two-site ELISA, and ELISA inhibition. Results Protein concentrations decreased by 86%, 51%, and 6% at RT, 4℃, and -20℃, respectively, when stored in distilled water. Overall allergenicity remained high (89.9%) when the extracts was reconstituted in 50% glycerol solution, and was 93.1% when reconstituted in 50% glycerol and 0.03% HSA at RT. Allergenicity was decreased to 36.6% and 33.3%, however, reconstitution in DW or 0.03% HSA solution at RT, respectively. Allergenicity was remained high as 92.0%-97.0% when stored at 4℃ regardless of the buffer conditions. Conclusions Storage temperature is the most important factor in preserving allergenicity of HDM extracts, which is ideal at 4℃. The addition of 50% glycerol to the storage buffer was also found to play an important role in increasing the shelf-life of HDM extracts at RT.
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Affiliation(s)
- Kyoung Yong Jeong
- Departmet of Internal Medicine and Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
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Zheng S, Tian H, Ma N, Qin G, Sun Z, Yu C. Purification and IgE-binding properties of soybean β-conglycinin subunits. Process Biochem 2012. [DOI: 10.1016/j.procbio.2012.07.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Jeong KY, Choi SY, Lee JH, Lee JS, Yong TS, Hong CS, Park JW. Preparation and characterization of an extract of german cockroach from a korean source. ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2012; 5:102-5. [PMID: 23449858 PMCID: PMC3579088 DOI: 10.4168/aair.2013.5.2.102] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2012] [Revised: 06/26/2012] [Accepted: 07/31/2012] [Indexed: 11/20/2022]
Abstract
PURPOSE The cockroach (CR) is an important cause of respiratory allergic disorders. We prepared a German CR extract in a standardized way and analyzed its allergenic properties. METHODS The extract was prepared from German CR (Blattella germanica) obtained from a Korean colony, and its allergenic activity was compared with that of the commercial Hollister-Stier (HS) extract. The concentrations of Bla g 1 and Bla g 2 were measured, and an in vitro specific IgE binding inhibition assay was performed to assess IgE reactivity. Proteolytic activity was examined by gelatin zymography. RESULTS Bla g 1 and Bla g 2 were detected at 405 U/mg and 273 ng/mg, respectively, in the Korean extract, and at 187 U/mg and 56 ng/mg, respectively, in the HS extract. The Korean extract showed 94.2% inhibition of IgE reactivity, as compared with the HS extract. A similar pattern of IgE-reactive bands was detected for the two extracts, indicating that their allergenic components are similar. The proteolytic activities of the Korean and HS extracts were found to be similar in gelatin zymography. The endotoxin levels in the Korean and HS extracts were 3,440 EU/mL and 6,580 EU/mL, respectively. CONCLUSIONS The German CR extract was prepared in a standardized way. The extract produced in this study will be useful for the development of allergy diagnostics and immunotherapeutic agents.
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Affiliation(s)
- Kyoung Yong Jeong
- Department of Internal Medicine and Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
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Jeong KY, Lee IY, Yong TS, Lee JH, Kim EJ, Lee JS, Hong CS, Park JW. Sequence polymorphisms of Der f 1, Der p 1, Der f 2 and Der p 2 from Korean house dust mite isolates. EXPERIMENTAL & APPLIED ACAROLOGY 2012; 58:35-42. [PMID: 22535483 DOI: 10.1007/s10493-012-9553-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2011] [Accepted: 04/03/2012] [Indexed: 05/31/2023]
Abstract
Amino acid sequence variations have possible influences on the allergenicity of allergens and may be important factors in allergen standardization. This study was undertaken to investigate the sequence polymorphisms of group 1 and 2 allergens from Korean isolates of the house dust mites Dermatophagoides farinae and D. pteronyssinus. cDNA sequences encoding group 1 and 2 allergens were amplified by RT-PCR and compared the deduced amino acid sequences. Der f 1.0101, which appeared in 64.0 % of the 50 sequences analyzed, was found to be predominant. Among the Der p 1 sequences, Der p 1.0102 and 1.0105 were predominant (58 %). Among the Der f 2 sequences, Der f 2.0102 (40.7 %) and a new variant with Gly at position 42 (27.8 %) were predominant. The deduced amino acid sequences of 60 Der p 2 clones were examined, and 28 variants with 1-5 amino acid substitutions were found. Interestingly, all of the Der p 2 sequences had Thr instead of Lys at position 49. Two variants (Leu40, Thr49, and Asn114 (26.6 %); Val40, Thr49, and Asn114 (20.0 %)) were found to be the most predominant forms of Der p 2. Der p 1 has a high rate of sporadic substitutions and the group 2 allergens show a more regular pattern with orderly associations of amino acid substitutions. Der f 1 and Der p 2 from Korean mite isolates have unique amino acid sequence polymorphisms. These findings provide important data for house dust mite allergen standardization.
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Affiliation(s)
- Kyoung Yong Jeong
- Department of Internal Medicine and Institute of Allergy, Yonsei University College of Medicine, 50 Yonei-ro, Seodaemun-gu, Seoul, 120-752, Korea.
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Shin YS, Sohn JH, Kim JY, Lee JH, Cho SH, Hong SJ, Lee JS, Hong CS, Park JW. Endotoxin is not essential for the development of cockroach induced allergic airway inflammation. Yonsei Med J 2012; 53:593-602. [PMID: 22477005 PMCID: PMC3343443 DOI: 10.3349/ymj.2012.53.3.593] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
PURPOSE Cockroach (CR) is an important inhalant allergen and can induce allergic asthma. However, the mechanism by which CR induces airway allergic inflammation and the role of endotoxin in CR extract are not clearly understood in regards to the development of airway inflammation. In this study, we evaluated whether endotoxin is essential to the development of CR induced airway allergic inflammation in mice. MATERIALS AND METHODS Airway allergic inflammation was induced by intranasal administration of either CR extract, CR with additional endotoxin, or endotoxin depleted CR extract, respectively, in BALB/c wild type mice. CR induced inflammation was also evaluated with toll like receptor-4 (TLR-4) mutant (C3H/HeJ) and wild type (C3H/HeN) mice. RESULTS Intranasal administration of CR extracts significantly induced airway hyperresponsiveness (AHR), eosinophilic and neutrophilic airway inflammation, as well as goblet cell hyperplasia in a dose-dependent manner. The addition of endotoxin along with CR allergen attenuated eosinophilic inflammation, interleukin (IL)-13 level, and goblet cell hyperplasia of respiratory epithelium; however, it did not affect the development of AHR. Endotoxin depletion in CR extract did not attenuate eosinophilic inflammation and lymphocytosis in BAL fluid, AHR and IL-13 expression in the lungs compared to CR alone. The attenuation of AHR, eosinophilic inflammation, and goblet cell hyperplasia induced by CR extract alone was not different between TLR-4 mutant and the wild type mice. In addition, heat inactivated CR extract administration induced attenuated AHR and eosinophilic inflammation. CONCLUSION Endotoxin in CR extracts may not be essential to the development of airway inflammation.
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Affiliation(s)
- Yoo Seob Shin
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seou, Korea
| | - Jung-Ho Sohn
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seou, Korea
- Department of Life Science, Biomedical Research Institute, Hanyang University, Seoul, Korea
| | - Joo-Young Kim
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seou, Korea
| | - Jae Hyun Lee
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seou, Korea
| | - Sang-Heon Cho
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Soo-Jong Hong
- Department of Pediatrics, University of Ulsan College of Medicine, Seoul, Korea
| | - Joo-Shil Lee
- Center for Immunology and Pathology, Korea National Institute of Health, Cheongwon, Korea
| | - Chein-Soo Hong
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seou, Korea
| | - Jung-Won Park
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seou, Korea
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Jeong KY, Choi SY, Lee JH, Lee IY, Yong TS, Lee JS, Hong CS, Park JW. Standardization of house dust mite extracts in Korea. ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2012; 4:346-50. [PMID: 23115731 PMCID: PMC3479228 DOI: 10.4168/aair.2012.4.6.346] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2011] [Revised: 02/01/2012] [Accepted: 02/10/2012] [Indexed: 11/20/2022]
Abstract
PURPOSE House dust mites are the most important cause of respiratory allergy in Korea. Standardization of allergen extracts is essential for improving diagnostics and immunotherapeutics. This study was undertaken to evaluate the allergenicity of standardized house dust mite allergen extracts from Korean house dust mite isolates. METHODS Allergen extracts were prepared from cultured Korean house dust mites (Dermatophagoides farinae and D. pteronyssinus). Allergenic activities of Korean house dust mite extracts were compared to standardized extracts from a company in the United States whose allergen concentrations were expressed as Allergy Units (AUs). Specifically, we compared group 1 and 2 major allergens using two-site enzyme-linked immunosorbent assay (ELISA) kits and an in vivo intradermal test. RESULTS Major allergen concentrations were 17.0 µg/mg (5.0 µg/mg of Der f 1 and 12.0 µg/mg of Der f 2) for a D. farinae extract and 24.0 µg/mg (11.6 µg/mg of Der p 1 and 12.4 µg/mg of Der p 2) for a D. pteronyssinus extract. Using chloramphenicol (CAP) inhibition assays, AUs were 12.5 AU/µg for a D. farinae extract and 12.8 AU/µg for a D. pteronyssinus extract. Allergenic activities were 3- to 4-fold stronger when assessed by intradermal skin tests for in vivo standardization. CONCLUSIONS Allergen extracts were prepared from Korean house dust mites and the allergenicities of the extracts were estimated using AU measurements. House dust mite extracts prepared in this study could be utilized as a reference material, which will be useful for the development of diagnostic and immunotherapeutic reagents in Korea.
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Affiliation(s)
- Kyoung Yong Jeong
- Department of Internal Medicine and Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
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Lee JH, Park KH, Kim HS, Kim KW, Sohn MH, Kim CH, Lee JS, Hong CS, Park JW. Specific IgE measurement using AdvanSure® system: comparison of detection performance with ImmunoCAP® system in Korean allergy patients. Clin Chim Acta 2012; 413:914-9. [PMID: 22394454 DOI: 10.1016/j.cca.2012.02.018] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2011] [Revised: 02/02/2012] [Accepted: 02/07/2012] [Indexed: 11/16/2022]
Abstract
BACKGROUND AdvanSure enzyme immunoassay (EIA) system is a recently developed multiple allergen screen test with specific immunoglobulin E (sIgE) detection assay, while ImmunoCAP fluorescent EIA (FEIA) has been widely used for sIgE detection. There has been no inter-assay comparison data for these two systems. We determined the detection performance of AdvanSure system compared to that of ImmunoCAP. METHODS We performed an inter-method comparison using sera from 199 Korean allergy patients, including asthma (39.7%), allergic rhinitis (54.8%), atopic dermatitis (36.2%) and food allergies (21.6%). We compared the sIgE detection performance for nine major inhalant and four food allergens. RESULTS 950 paired assay results were analyzed. Most allergen sIgE results showed above 0.5 intraclass correlation coefficient except Blattella germanica, alternaria and mugwort allergen. Intermethod comparison results showed multiple differences in a few allergens. The inter-method concordance was moderate to substantial for most allergens (κ=0.528-0.778, p<0.001), except for cat dander. CONCLUSION AdvanSure system showed a good detection performance compared with ImmunoCAP in correlation and agreement in Korean allergy patients. However, in terms of differences in the methodologies used by these two systems, careful clinical correlation is needed for interpretation of AdvanSure EIA results.
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Affiliation(s)
- Jae-Hyun Lee
- Division of Allergy and Immunology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
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