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Sun Y, Na R, Zhu L, Yang X, Tan X, Zheng L, Li H, Yu Y. Establishment of a homogeneous chemiluminescence immunoassay for cat dander sIgE antibody detection. J Asthma 2024; 61:10-19. [PMID: 37421635 DOI: 10.1080/02770903.2023.2234994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 06/30/2023] [Accepted: 07/05/2023] [Indexed: 07/10/2023]
Abstract
BACKGROUND In vitro specific IgE (sIgE) testing has become an important tool for the diagnosis of IgE-mediated allergic diseases. Current methods used to detect allergen sIgE are time consuming and/or expensive. Therefore, a new method was developed for rapid quantitative detection of cat dander-sIgE antibody based on homogeneous chemiluminescence immunoassay. METHODS Selection of chemibeads with different chemical groups, and the best Light-initiated chemiluminescence assay (LiCA) analytical mode for cat dander-sIgE detection. To validate and eliminate the interference of IgE on the detection of cat dander-sIgE, concentration of biotinylated anti-human IgE antibody was optimized. For quantification of cat dander-sIgE, a calibration curve was established, and the performance of the assay was evaluated according to clinical guidelines. RESULTS Indirect LiCA is the best mode of analysis and biotinylated anti-human IgE antibody at a dilution ratio of 1:250 minimizes IgE interference. The coefficient of variation of the developed LiCA was 1.49% to 4.66%, with an intermediate precision of 6.90% to 8.21%. The LoB, LoD, and LoQ of the assay were 0.023 kUA/L, 0.056 kUA/L and 0.185 kUA/L. The coefficient of correlation (r) between LiCA and ImmounoCAP was 0.9478. CONCLUSIONS A cat dander-sIgE quantitation assay based on homogeneous chemiluminescence immunoassay was established, which could be a new reliable analytical tool for the determination of cat dander-sIgE.
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Affiliation(s)
- Yuanmin Sun
- Department of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Tianjin, China
| | - Ren Na
- Department of Clinical Laboratory, Tianjin Children's Hospital, Tianjin, China
| | - Lina Zhu
- Department of Clinical Laboratory, Second Affiliated Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Xiaohui Yang
- Department of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Tianjin, China
| | - Xin Tan
- Department of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Tianjin, China
| | - Lisheng Zheng
- Department of Clinical Laboratory, Tianjin Children's Hospital, Tianjin, China
| | - Huiqiang Li
- Department of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Tianjin, China
| | - Yang Yu
- Department of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Tianjin, China
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Wang X, Hu Y, Tan H, Dong X, Zhang S, Fu S, Gao J, Chen H, Liu G, Li X. Glutamine and lysine as common residues from epitopes on α-lactalbumin and β-lactoglobulin from cow milk identified by phage display technology. J Dairy Sci 2023; 106:7382-7395. [PMID: 37641259 DOI: 10.3168/jds.2022-23151] [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: 12/13/2022] [Accepted: 04/30/2023] [Indexed: 08/31/2023]
Abstract
Cow milk is an important source of food protein for children; however, it could lead to allergy, especially for infants. α-Lactalbumin (α-LA) and β-lactoglobulin (β-LG) from whey protein make up a relatively high proportion of milk proteins and have received widespread attention as major allergens in milk. However, few studies have identified the epitopes of both proteins simultaneously. In this study, ImmunoCAP and indirect ELISA were first used for detection of sIgE to screen sera from allergic patients with high binding capacity for α-LA and β-LG. Subsequently, the mimotopes was biopanned by phage display technology and bioinformatics and 17 mimic peptide sequences were obtained. Aligned with the sequences of α-LA or β-LG, we identified one linear epitope on α-LA at AA 11-26 and 5 linear epitopes on β-LG at AA 9-29, AA 45-57, AA 77-80, AA 98-101, and AA 121-135, respectively. Meanwhile, the 8 conformational epitopes and their distributions of α-LA and β-LG were located using the Pepitope Server. Finally, glutamine and lysine were determined as common AA residues for the conformational epitopes both on α-LA and β-LG. Moreover, we found the addition of mouse anti-human IgE during the biopanning process did not significantly affect the identification of the epitopes.
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Affiliation(s)
- Xinyu Wang
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, China; School of Food Science and Technology, Nanchang University, Nanchang 330047, China
| | - Yongxin Hu
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, China; School of Food Science and Technology, Nanchang University, Nanchang 330047, China
| | - Hongkai Tan
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, China; School of Food Science and Technology, Nanchang University, Nanchang 330047, China
| | - Xiang Dong
- Department of Allergology, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - Shuchen Zhang
- Department of Allergy, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430014, China
| | - Siqi Fu
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, China; School of Food Science and Technology, Nanchang University, Nanchang 330047, China
| | - Jinyan Gao
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, China; School of Food Science and Technology, Nanchang University, Nanchang 330047, China; Jiangxi Province Key Laboratory of Food Allergy, Nanchang University, Nanchang, 330047, China
| | - Hongbing Chen
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, China; Jiangxi Province Key Laboratory of Food Allergy, Nanchang University, Nanchang, 330047, China; Sino-German Joint Research Institute (Jiangxi-OAI), Nanchang University, Nanchang 330047, China
| | - Guanghui Liu
- Department of Allergology, Zhongnan Hospital of Wuhan University, Wuhan 430071, China.
| | - Xin Li
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, China; School of Food Science and Technology, Nanchang University, Nanchang 330047, China; Jiangxi Province Key Laboratory of Food Allergy, Nanchang University, Nanchang, 330047, China.
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Tan X, Zhang B, Zheng L, Shi H, Liu D, Sun Y, Li X, Li H. Performance evaluation of a laboratory-developed light-initiated chemiluminescence assay for quantification of egg white-specific IgE. J Clin Lab Anal 2022; 36:e24544. [PMID: 35708142 PMCID: PMC9279973 DOI: 10.1002/jcla.24544] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 05/21/2022] [Accepted: 05/23/2022] [Indexed: 11/24/2022] Open
Abstract
Background Specific IgE (sIgE) testing has become one of the most important tools for diagnosing IgE‐mediated food allergy. Enzyme‐linked immunosorbent assay (ELISA) and dot‐enzyme‐linked immunosorbent assay (Dot‐ELISA) have been used to measure sIgE in clinical widely. Light‐initiated chemiluminescence assay (LICA) is a new method for measuring allergen‐sIgE. We aimed to establish a LICA method for quantitative detection of egg white‐sIgE and evaluate its performances. Methods The best chemibeads coupling method in detecting egg white‐sIgE was selected, and a LICA method for quantitative detection of egg white‐sIgE was established. The precision study was performed according to Clinical and Laboratory Standards Institute (CLSI) EP5‐A2. Detection capability which contains limit of blank (LoB), limit of detection (LoD), and limit of quantitation (LoQ) was evaluated according to National Health Commission of the People's Republic of China (NHC) WS/T 514–2017. Linear range was evaluated according to CLSI EP6‐A. All data were analyzed using SPSS software. Results Precision contains repeatability and intermediate precision. The CV of repeatability ranged from 2.72% to 7.29%, and the CV of intermediate precision ranged from 4.93% to 8.64%. The LoB, LoD, and LoQ of the assay were 0.000 kUA/L, 0.053 kUA/L, and 0.076 kUA/L. The assay linear range was 0.076–34.125 kUA/L (r = 0.9979 ≥ 0.9900). Conclusion This laboratory‐developed LICA method can detect egg white‐sIgE, and performance meets clinical requirements. This method shows rapid turnaround cycles and high sensitivity. It can be used as an alternative method for clinical detection of egg white‐sIgE.
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Affiliation(s)
- Xin Tan
- School of Medical Laboratory, Tianjin Medical University, Tianjin, China
| | - Bei Zhang
- School of Medical Laboratory, Tianjin Medical University, Tianjin, China
| | - Lisheng Zheng
- Department of Clinical Laboratory, Tianjin Children's Hospital, Tianjin University, Tianjin, China
| | - Hongbin Shi
- Precision Medicine Center, Tianjin Medical University General Hospital, Tianjin, China
| | - Dandan Liu
- School of Medical Laboratory, Tianjin Medical University, Tianjin, China
| | - Yuanmin Sun
- School of Medical Laboratory, Tianjin Medical University, Tianjin, China
| | - Xue Li
- School of Medical Laboratory, Tianjin Medical University, Tianjin, China
| | - Huiqiang Li
- School of Medical Laboratory, Tianjin Medical University, Tianjin, China
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Lee H, Ryu JH, Choi AR, Kim Y, Oh EJ. Inter-laboratory comparison of semiquantitative allergen-specific Immunoglobulin E test: 7 years of experience in Korea. J Clin Lab Anal 2022; 36:e24222. [PMID: 34994992 PMCID: PMC8842192 DOI: 10.1002/jcla.24222] [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: 08/22/2021] [Revised: 11/28/2021] [Accepted: 12/23/2021] [Indexed: 11/11/2022] Open
Abstract
INTRODUCTION Multiple allergen simultaneous test (MAST) is widely used as a screening tool for allergic diseases and has the advantage of providing specific IgE (sIgE) results for various allergens in semiquantitative class. We have continuously conducted external quality assessment (EQA) since 2012 for clinical laboratories performing MAST using AdvanSure allergy screen test (LG CHEM, Korea). This study provides an account of the EQA experience. METHODS Samples were prepared using pooled sera collected from patients with suspected allergic disease and sent to each laboratory twice a year. Each round included 4-6 serum samples with sIgE for 10-20 inhaled or food allergens. The acceptable class value was the most frequently reported MAST class ±1 titer that exceeded 80% of the total laboratory results. RESULTS The average number of participating laboratories was 76 (49-90) and the average response rate was 97.3% during the entire survey period. The acceptable rates were consistently high at 97.7% ± 3.7%. Of the total 537 trials, 18 trials (3.4%) were regarded as nonconsensus results, in which acceptable answers did not exceed 80%. For unacceptable results, the false-negative rate (1.5% ± 2.8%) was higher than the false-positive rate (0.8% ± 2.7%) (p < 0.001). MAST class results were correlated with quantitative IgE results by ImmunoCAP (Spearman's correlation coefficient of 0.682 (p < 0.001) and gamma index of 0.777 (p < 0.001). CONCLUSION Although EQA for MAST showed a high level of acceptable answer, some allergen assays require harmonization. Continuous performance of systematic EQA is needed to improve the accuracy of sIgE assays and quality control in clinical laboratories.
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Affiliation(s)
- Hyeyoung Lee
- Department of Laboratory Medicine, College of Medicine, International St. Mary's Hospital, Catholic Kwandong University, Incheon, Korea
| | - Ji Hyeong Ryu
- Department of Laboratory Medicine, College of Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - Ae-Ran Choi
- Department of Laboratory Medicine, College of Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - Yonggoo Kim
- Department of Laboratory Medicine, College of Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - Eun-Jee Oh
- Department of Laboratory Medicine, College of Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
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Nam JS, Ahn SH, Ha JG, Park JJ, Noh HE, Yoon JH, Kim CH, Cho HJ. Differential Correlations among Allergy Tests According to Indoor Allergens in Allergic Rhinitis. Ann Otol Rhinol Laryngol 2021; 131:71-77. [PMID: 33870717 DOI: 10.1177/00034894211008702] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
OBJECTIVES Several allergy tests are used for the diagnosis of allergic rhinitis; however, few studies have reported a direct comparison of the skin prick test (SPT), multiple allergen simultaneous test (MAST), and ImmunoCAP according to specific allergens. This study aimed to evaluate the correlations between each test and allergic rhinitis symptoms and to evaluate the correlations of the MAST and ImmunoCAP with the SPT for representative indoor allergens in Korea. METHODS Electronic medical charts were retrospectively reviewed, and 698 patients with allergic rhinitis who had performed SPT, MAST, and ImmunoCAP were enrolled. Correlations between each allergy test for 4 representative indoor allergens and the symptoms of allergic rhinitis were analyzed. Agreements of the MAST and ImmunoCAP with the SPT were compared according to each allergen. RESULTS The SPT showed higher correlations with allergic rhinitis symptoms for 4 indoor allergens (Dermatophagoides pteronyssinus, Dermatophagoides farinae, cat, and dog allergens) than the MAST or ImmunoCAP. In comparison between the MAST and SPT, the least correlation was observed for the dog allergen, whereas between the ImmunoCAP and SPT, the least correlation was observed for the cat allergen. The correlation between the ImmunoCAP and SPT was higher than that between the MAST and SPT for the dog allergen, whereas no significant differences were noted for other allergens. CONCLUSIONS Overall, the SPT showed a higher correlation with allergic rhinitis symptoms than the MAST or ImmunoCAP for 4 indoor allergens. ImmunoCAP showed similar reactivity to MAST; however, it showed better positivity with dog allergen in patients who were reactive to the allergen in the SPT. Care should be taken while evaluating dog allergen sensitization using the MAST.
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Affiliation(s)
- Jae-Sung Nam
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - Sang Hyeon Ahn
- Department of Otorhinolaryngology, Bundang Jesaeng Hospital, Seongnam, Korea.,Department of Medicine, The Graduate School of Yonsei University, Seoul, Korea
| | - Jong-Gyun Ha
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - Jeong-Jin Park
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - Hae Eun Noh
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - Joo-Heon Yoon
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea.,Airway Mucus Institute, Yonsei University College of Medicine, Seoul, Korea
| | - Chang-Hoon Kim
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea.,Airway Mucus Institute, Yonsei University College of Medicine, Seoul, Korea
| | - Hyung-Ju Cho
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea.,Airway Mucus Institute, Yonsei University College of Medicine, Seoul, Korea
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Kim YJ, Yang SI. Seasonality of asthma exacerbation in children caused by respiratory virus infection and allergen sensitization. ALLERGY ASTHMA & RESPIRATORY DISEASE 2021. [DOI: 10.4168/aard.2021.9.4.238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Yoo Jin Kim
- Department of Pediatrics, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - Song-I Yang
- Department of Pediatrics, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
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Casas ML, Esteban Á, González-Muñoz M, Labrador-Horrillo M, Pascal M, Teniente-Serra A. Proyecto VALIDA: Validation of ALlergy In vitro Diagnostics Assays (Herramientas y recomendaciones para la valoración de las pruebas in vitro en el diagnóstico de la alergia). ADVANCES IN LABORATORY MEDICINE 2020; 1:20200022. [PMCID: PMC10197503 DOI: 10.1515/almed-2020-0022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 05/05/2020] [Indexed: 08/29/2023]
Abstract
En la evaluación del paciente con sospecha de alergia las pruebas de detección y cuantificación de la inmunoglobulina E (IgE) específica in vitro se usan de manera habitual en los laboratorios clínicos para ayudar en el diagnóstico de la alergia. Actualmente existen diferentes alternativas comerciales para realizar estos ensayos, pero los resultados obtenidos por cada uno de ellos pueden variar, lo que condiciona el diagnóstico y el tratamiento que se le proporcionará al paciente. Con el fin de dar respuesta a los retos planteados por las diferencias entre las distintas técnicas para la determinación in vitro de la IgE específica, un grupo de expertos ha recogido en un documento una serie de recomendaciones sobre las implicaciones que puede tener el uso de una determinada técnica in vitro y el impacto en el manejo del paciente alérgico que suponen las diferencias entre las distintas técnicas. La lectura y el análisis de este documento de consenso ayudarán a entender las implicaciones que tiene el cambio de método de diagnóstico in vitro en el manejo del paciente con alergia, en su calidad de vida y en los costes socioeconómicos asociados a la enfermedad.
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Affiliation(s)
- María L. Casas
- Sociedad Española de Medicina de Laboratorio (SEQC-ML), Barcelona, España
- Servicio de Análisis Clínicos, Hospital Universitario Fundación Alcorcón, Alcorcón, Madrid, España
| | - Ángel Esteban
- Sociedad Española de Medicina de Laboratorio (SEQC-ML), Barcelona, España
- Servicio de Análisis Clínicos, Hospital General Universitario de Alicante, Alicante, España
| | - Miguel González-Muñoz
- Sociedad Española de Inmunología (SEI), Barcelona, España
- Servicio de Inmunología, Hospital Universitario La Paz, Madrid, España
| | - Moisés Labrador-Horrillo
- Sociedad Española de Alergología e Inmunología Clínica (SEAIC), Madrid, España
- Servicio de Alergología, Hospital Universitari Vall d’Hebron, Barcelona, España
| | - Mariona Pascal
- Servicio de Alergología, Hospital Universitari Vall d’Hebron, Barcelona, España
- Servicio de Inmunología, CDB, Hospital Clínic de Barcelona, IDIBAPS, Universitat de Barcelona, Barcelona, España
- Red de Investigación ARADyAL, Instituto Carlos III, Madrid, España
| | - Aina Teniente-Serra
- Sociedad Española de Inmunología (SEI), Barcelona, España
- Servicio de Inmunología, LCMN, Hospital Universitari Germans Trias i Pujol, Badalona, España
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Casas ML, Esteban Á, González-Muñoz M, Labrador-Horrillo M, Pascal M, Teniente-Serra A. VALIDA project: Validation of allergy in vitro diagnostics assays (Tools and recommendations for the assessment of in vitro tests in the diagnosis of allergy). ADVANCES IN LABORATORY MEDICINE 2020; 1:20200051. [PMID: 37360620 PMCID: PMC10197418 DOI: 10.1515/almed-2020-0051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 05/05/2020] [Indexed: 06/28/2023]
Abstract
In vitro allergen-specific immunoglobulin E (IgE) detection and quantification tests are routinely performed in clinical laboratories to diagnose patients with a suspected allergy. Numerous commercial assays are available to test for allergies, but the results can vary widely, thereby influencing both diagnosis and treatment. Given the challenges posed by differences in the various assays for in vitro determination of specific IgE, a group of experts has compiled in a document a series of recommendations on the implications that the use of a certain in vitro technique may have and the impact on the management of the allergic patient that the differences between the various techniques represent. The reading and analysis of this consensus document will help to understand the implications of the change of in vitro diagnostic method in the management of the patient with allergy, in the quality of life and in the socioeconomic costs associated with the disease.
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Affiliation(s)
- María L. Casas
- Clinical Analysis Service, Fundación Alcorcón University Hospital, Alcorcón, Madrid, Spain
- Spanish Society of Laboratory Medicine (SEQC-ML), Barcelona, Spain
| | - Ángel Esteban
- Spanish Society of Laboratory Medicine (SEQC-ML), Barcelona, Spain
- Clinical Analysis Service, University General Hospital of Alicante, Alicante, Spain
| | - Miguel González-Muñoz
- Immunology Service, La Paz University Hospital, Madrid, Spain
- Spanish Society of Immunology (SEI), Barcelona, Spain
| | - Moisés Labrador-Horrillo
- Allergology Service, Vall d’Hebron University Hospital, Barcelona, Spain
- Spanish Society of Allergology and Clinical Immunology (SEAIC), Madrid, Spain
| | - Mariona Pascal
- Spanish Society of Immunology (SEI), Barcelona, Spain
- Spanish Society of Allergology and Clinical Immunology (SEAIC), Madrid, Spain
- Immunology Service, CBD, Hospital Clínic de Barcelona, IDIBAPS, Universitat de Barcelona, Barcelona, Spain
- ARADyAL Research Network, Carlos III Institute, Madrid, Spain
| | - Aina Teniente-Serra
- Spanish Society of Immunology (SEI), Barcelona, Spain
- Immunology Service, LCMN, Germans Trias i Pujol University Hospital, Badalona, Spain
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Park DJ, Lee J, Kim SY, Kwon HJ, Lee HK, Kim Y. Evaluation of AdvanSure AlloScreen Max Panel With 92 Different Allergens for Detecting Allergen-Specific IgE. Am J Clin Pathol 2019; 151:628-637. [PMID: 30984971 DOI: 10.1093/ajcp/aqz023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVES The objective of this study was to examine the performance of AdvanSure AlloScreen Max with 92 different allergens compared to Polycheck Allergy and ImmunoCAP. The relationship of serum IgE concentration with the number and the highest class/level of positive allergen-specific IgEs was also examined. METHODS A total of 406 serum samples were included in this study. Discrepant cases between AdvanSure AlloScreen Max and Polycheck Allergy underwent ImmunoCAP testing for allergen-specific IgE. RESULTS Total agreement of the two multiple allergen simultaneous tests (MAST) was 92.5%. Compared to ImmunoCAP, total agreement rate was higher with AdvanSure AlloScreen Max (60.8%) than that with Polycheck Allergy (39.2%). Serum IgE concentration showed a significant and positive correlation with the number and the highest class/level of positive allergen-specific IgEs. CONCLUSIONS A MAST assay panel containing as many allergens as possible would be more helpful in the allergen screening for patients with high serum IgE concentration.
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Affiliation(s)
- Dong Jin Park
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul
| | - Jehoon Lee
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul
| | - Soo-Young Kim
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul
| | - Hi Jeong Kwon
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul
| | - Hae Kyung Lee
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul
| | - Yeongsic Kim
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul
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Kim SR, Park KH, Lee JH, Kim BJ, Hwang JH, Lim KJ, Park JW. Validation of PROTIA™ Allergy-Q 64 Atopy® as a Specific IgE Measurement Assay for 10 Major Allergen Components. ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2019; 11:422-432. [PMID: 30912330 PMCID: PMC6439187 DOI: 10.4168/aair.2019.11.3.422] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 01/20/2019] [Accepted: 01/21/2019] [Indexed: 01/25/2023]
Abstract
PURPOSE Component-resolved diagnostics (CRD) is expected to provide additional diagnostic information in allergic patients. PROTIA™ Allergy-Q 64 Atopy®, a recently developed CRD-based multiplex specific immunoglobulin E (sIgE) assay, can quantitatively measure sIgE to major allergen components. METHODS The sIgE detection by PROTIA™ Allergy-Q 64 Atopy® and ImmunoCAP® assays was compared using the sera of 125 Korean allergic patients. Group 1 and 2 allergens of house dust mites (HDMs; Dermatophagoides farinae (Der f) 1 and Der f 2 in PROTIA™ Allergy-Q 64 Atopy®, Dermatophagoides pteronyssinus (Der p) 1 and Der p 2 in ImmunoCAP®), Bet v 1, Fel d 1, Que a 1, ω-5 gliadin, α-lactalbumin, β-lactoglobulin, casein and α-Gal were measured by both assays. RESULTS Comparing the results from the 2 assays, the agreement rate for all the 10 allergens was > 88% (group 1 HDM allergen, 100%; group 2 HDM allergen, 94.6%; Bet v 1, 97.4%; Fel d 1, 90.5%; Que a 1, 89.2%; α-lactalbumin, 96%; β-lactoglobulin, 88%; casein, 88%; ω-5 gliadin, 96%; α-Gal, 100%). Correlation analysis indicated that, all the 10 allergen sIgEs showed more than moderate positive correlation (Pearson correlation coefficients > 0.640). Additionally, intra-class comparison showed more than high correlation for all the 10 allergens (Spearman's rank correlation coefficients > 0.743). CONCLUSIONS PROTIA™ Allergy-Q 64 Atopy® is reliable and comparable to the ImmunoCAP® assay for component-resolved diagnosis.
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Affiliation(s)
- Sung Ryeol Kim
- 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
| | - 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.
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Lee SC, Kim SR, Park KH, Lee JH, Park JW. Clinical Features and Culprit Food Allergens of Korean Adult Food Allergy Patients: A Cross-Sectional Single-Institute Study. ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2019; 11:723-735. [PMID: 31332982 PMCID: PMC6658406 DOI: 10.4168/aair.2019.11.5.723] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 05/23/2019] [Accepted: 06/03/2019] [Indexed: 12/31/2022]
Abstract
Purpose To investigate the causative allergens and clinical characteristics of Korean adult patients with food allergy (FA). Methods This retrospective, cross-sectional single-institutional study enrolled Korean adult patients (n = 812) suspected of having FA. For diagnosis, causality assessment history taking, ImmunoCAP specific immunoglobulin E measurement and/or skin prick test were performed. Results Among 812 patients, 415 were diagnosed as having FA. The most common causative allergen was fruit, with a diagnosis of pollen food allergy syndrome (PFAS: 155, 37.3%), followed by crustaceans (111, 26.7%), wheat (63, 15.1%), fruits in patients without PFAS(43, 10.3%), buckwheat (31, 7.4%), peanut (31, 7.4%), walnut (25, 6.0%), red meat due to reaction to galactose-α-1,3-galactose (α-Gal) (8, 1.9%), and silkworm pupa (13, 3.1%). Allergy to egg, milk, fish, or shellfish was rare in Korean adults. One-third of patients with FA exhibited multiple FAs (238/415, 57.3%); the average number of causative allergens was 2.39. About 129 patients (31.0%) were diagnosed as having anaphylaxis; in these patients, wheat was the most frequent causative food. Twenty patients were further diagnosed with food-dependent exercise-induced anaphylaxis (FDEIA); all were due to wheat. In particular, crustaceans, wheat, PFAS, buckwheat, and red meat (α-Gal) were also frequent causes of anaphylaxis. Conclusions Wheat, fruits with or without PFAS, and crustaceans are important and frequent causative allergens in Korean adult FA; these allergens differ from those found in childhood FA. It is notable that non-classic allergies, such as PFAS, FDEIA, and α-Gal allergy, are the important causes of anaphylaxis in Korean adult FA.
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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.,Division of Pulmonology, Department of Internal Medicine, National Health Insurance Service Ilsan Hospital, Goyang, Korea
| | - Sung Ryeol Kim
- 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
| | - 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.
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12
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Park SC, Hwang CS, Chung HJ, Purev M, Al Sharhan SS, Cho HJ, Yoon JH, Kim CH. Geographic and demographic variations of inhalant allergen sensitization in Koreans and non-Koreans. Allergol Int 2019; 68:68-76. [PMID: 30104152 DOI: 10.1016/j.alit.2018.07.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 06/21/2018] [Accepted: 07/01/2018] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND To diagnose and treat respiratory allergic diseases, it is important to identify the specific allergens involved. Many differences exist between common inhalant allergens depending on the residential environment and demographic factors. This study aimed to compare common inhalant allergens between Koreans and non-Koreans according to their residential region, age, and sex. METHODS This study evaluated 15,334 individuals who underwent serum tests for multiple allergen-specific immunoglobulin E at a tertiary academic medical center between January 2010 and December 2016. The individuals included 14,786 Koreans and 548 non-Koreans. The AdvanSure™ Allostation assay (LG Life Science, Korea) was used to test for 33 inhalant allergens. RESULTS The house dust mite (HDM) was the most common allergen in both Koreans and non-Koreans, although the proportion of individuals with HDM sensitization was greater among Koreans. High sensitization rates for various pollen types were detected among Koreans in Gangwon region, whereas Japanese cedar pollen was unique among Koreans in Jeju region. Grass pollen and animal dander were relatively common among individuals from the Americas, whereas weed and grass pollen accounted for the 10 most common allergens for individuals from Central Asia. The total sensitization rate, sensitization to HDM, and sensitization to animal dander peaked among adolescents and young adults, then subsequently decreased with age. CONCLUSIONS This large-scale study demonstrates that various regional and age-related differences exist in the allergen sensitization rates of Koreans and non-Koreans. These data could be useful for development of avoidance measures, immunotherapy for causative allergens, and policymaking regarding allergic diseases.
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13
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Lee SJ, Kim JM, Kim HB. Recent changing pattern of aeroallergen sensitization in children with allergic diseases: A single center study. ALLERGY ASTHMA & RESPIRATORY DISEASE 2019. [DOI: 10.4168/aard.2019.7.4.186] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Su-Jin Lee
- Department of Pediatrics, Inje University Sanggye Paik Hospital, Seoul, Korea
| | - Jung-Min Kim
- Department of Pediatrics, Inje University Sanggye Paik Hospital, Seoul, Korea
| | - Hyo-Bin Kim
- Department of Pediatrics, Inje University Sanggye Paik Hospital, Seoul, Korea
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14
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Jeon H, Jung JH, Kim Y, Kwon Y, Kim ST. Allergen Microarrays for In Vitro Diagnostics of Allergies: Comparison with ImmunoCAP and AdvanSure. Ann Lab Med 2018; 38:338-347. [PMID: 29611384 PMCID: PMC5895863 DOI: 10.3343/alm.2018.38.4.338] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 10/16/2017] [Accepted: 03/12/2018] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND In vitro detection of the allergen-specific IgE antibody (sIgE) is a useful tool for the diagnosis and treatment of allergies. Although multiple simultaneous allergen tests offer simple and low-cost screening methods, these platforms also have limitations with respect to multiplexibility and analytical performance. As an alternative assay platform, we developed and validated a microarray using allergen extracts that we termed "GOLD" chip. METHODS Serum samples of 150 allergic rhinitis patients were used in the study, and the diagnostic performance of the microarray was compared with that of AdvanSure (LG Life Sciences, Daejun, Korea) and ImmunoCAP (Phadia, Uppsala, Sweden). Standard IgE samples were used for the quantitative measurement of sIgEs. RESULTS The microarray-based assay showed excellent performance in the quantitative measurement of sIgEs, demonstrating a linear correlation within the range of sIgE concentrations tested. The limit of detection (LOD) was lower than 0.35 IU/mL, which is the current standard for the LOD cut-off. The assay also provided highly reproducible sets of data. The total agreement percentage of positive and negative calls was 92.2% compared with ImmunoCAP. Moreover, an outstanding correlation was observed between the microarray and the ImmunoCAP results, with Cohen's kappa and Pearson correlation coefficient values of 0.80 and 0.79, respectively. CONCLUSIONS The microarray-based in vitro diagnostic platform offers a sensitive, reproducible, and highly quantitative method to detect sIgEs. The results showed strong correlations with that of ImmunoCAP. These results suggest that the new allergen microarray can serve as a useful alternative to current screening platforms, ultimately becoming a first-line screening method.
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Affiliation(s)
- Hyunjin Jeon
- Department of Biomedical Engineering (BK21 Plus), Dongguk University, Seoul, Korea
| | - Joo Hyun Jung
- Department of Otolaryngology, Gil Medical Center, Gachon University, Incheon, Korea
| | - Yoonji Kim
- Department of Biomedical Engineering (BK21 Plus), Dongguk University, Seoul, Korea.,Department of Research and Development, Won Medical Co., Bucheon, Korea
| | - Youngeun Kwon
- Department of Biomedical Engineering (BK21 Plus), Dongguk University, Seoul, Korea.
| | - Seon Tae Kim
- Department of Otolaryngology, Gil Medical Center, Gachon University, Incheon, Korea
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Shoormasti RS, Fazlollahi MR, Kazemnejad A, Movahedi M, Tayebi B, Yazdanyar Z, Azadi Z, Pourpak Z, Moin M. Accuracy of immunoblotting assay for detection of specific IgE compared with ImmunoCAP in allergic patients. Electron Physician 2018; 10:6327-6332. [PMID: 29629055 PMCID: PMC5878026 DOI: 10.19082/6327] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2017] [Accepted: 11/25/2017] [Indexed: 11/21/2022] Open
Abstract
Background and aim Standardized techniques help us to better diagnosis and follow up of allergic diseases. In this study, we determined the sensitivity, accuracy, and specificity of an Immunoblotting test compared to ImmunoCAP as the reference in vitro test for detection of specific IgE in allergic patients. Methods In this cross-sectional study, specific IgE level was determined in patients with allergic symptoms who referred to the Immunology, Asthma and Allergy Research Institute, Tehran, Iran from 2010–2016, by two techniques. Eleven different allergens (six aeroallergens and five food allergens) were determined, and 303 specific IgE tests were performed for the patients by each method. The Immunoblotting test is a multiplex assay on a nitrocellulose membrane coated with 20 selected allergens. ImmunoCAP is considered as the reference method for determination of in vitro specific IgE. Its principle is an automated sandwich immunoassay, and allergens were bound to the solid phase, covalently. Finally, the fluorescence of elute was determined. Specific IgE more than 0.35 KU/L was considered as a positive test. Sensitivity, specificity, accuracy, kappa coefficient, positive and negative likelihood ratio (+/− LR), and correlation coefficient (calculated with Spearman test) between two tests were determined using statistical analysis (SPSS software, version 18). Results One hundred and thirty five patients entered this study. The median age of the patients was 3.75 years with the males constituting 54.8% of the population. The most common cheif complaints were respiratory (51.6%), skin (41.8%) and gastrointestinal (27.9%) symptoms, respectively. The sensitivity, specificity, accuracy, +LR and −LR were 83%, 97%, 92%, 27.66 and 0.17, respectively. The kappa coefficient of the immunoblotting test was 0.81 compared to the reference technique. The correlation coefficient for positive tests between the two methods was 0.71 (p<0.001). Conclusion Regarding the presence of 20 allergens in a RIDA allergy panel and according to our findings, this immunoblotting test with high sensitivity could be used as a fast and cost-efficient screening test. However, ImmunoCAP is recommended when the accurate level of specific IgE is required. ImmunoCAP findings are particularly helpful for immunotherapy and the elimination diet.
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Affiliation(s)
- Raheleh Shokouhi Shoormasti
- Ph.D. Student, Immunology, Asthma and Allergy Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Reza Fazlollahi
- MD., Allergist and Clinical Immunologist, Assistant Professor, Immunology, Asthma and Allergy Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Anoshirvan Kazemnejad
- Ph.D. of Biostatistics, Professor, Department of Biostatistics, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Masoud Movahedi
- MD., Allergist and Clinical Immunologist, Professor, Department of Allergy and Clinical Immunology, Children Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Behnoosh Tayebi
- Ph.D. Student, Immunology, Asthma and Allergy Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Zahra Yazdanyar
- B.Sc., Immunology, Asthma and Allergy Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Zakieh Azadi
- B.Sc., Immunology, Asthma and Allergy Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Zahra Pourpak
- MD, Ph.D. of Immunology, Professor, Immunology, Asthma and Allergy Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Mostafa Moin
- MD., Allergist and Clinical Immunologist, Professor, Immunology, Asthma and Allergy Research Institute, Tehran University of Medical Sciences, Tehran, Iran
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16
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Park KH, Lee J, Sim DW, Lee SC. Comparison of Singleplex Specific IgE Detection Immunoassays: ImmunoCAP Phadia 250 and Immulite 2000 3gAllergy. Ann Lab Med 2018; 38:23-31. [PMID: 29071815 PMCID: PMC5700143 DOI: 10.3343/alm.2018.38.1.23] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 05/17/2017] [Accepted: 09/15/2017] [Indexed: 01/23/2023] Open
Abstract
BACKGROUND The identification of clinically meaningful specific immunoglobulin E (sIgE) is important for the diagnosis and management of allergic diseases. Various in vitro sIgE detection methods are available worldwide. Depending on the number of antigens that can be tested simultaneously, there are two representative methods: singleplex and multiplex. Singleplex sIgE detection is mainly provided by Thermo Fisher (ImmunoCAP) and Siemens (Immulite). This study aimed to compare the diagnostic agreement of two singleplex sIgE detection assays. METHODS Sera from 209 Korean patients with allergic disease were used to compare the ImmunoCAP and Immulite assays with respect to the following allergens: inhalant allergens (Dermatophagoides farinae, cat and dog dander, oak, rye grass, mugwort, Alternaria, German cockroach) and food allergens (hen's egg white, cow's milk, wheat, peanut, soybean, and shrimp). Data from 902 paired comparison tests were included for comparisons. Qualitative, semi-quantitative, and quantitative comparisons were performed using statistical analyses. RESULTS In qualitative comparisons, the positivity and negativity agreements ranged from 75% (wheat, shrimp) to 96% (Alternaria). Class consistency (classes 0-6) was well matched. Spearman's rank correlation coefficients for all allergens except shrimp were over 0.7. In quantitative comparisons, all allergens excluding shrimp showed >0.7 intra-class correlation coefficients. CONCLUSIONS The ImmunoCAP and Immulite systems showed similar performances. However, clinicians should consider fundamental methodological differences between the assays.
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Affiliation(s)
- 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.
| | - Jongsun Lee
- Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Da Woon Sim
- Division of Allergy and Immunology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
- Division of Allergy, Asthma, and Clinical Immunology, Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea
| | - 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
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17
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Bian Y, Liu C, She T, Wang M, Yan J, Wei D, Li H. Development of a light-initiated chemiluminescent assay for the quantitation of sIgE against egg white allergens based on component-resolved diagnosis. Anal Bioanal Chem 2017; 410:1501-1510. [DOI: 10.1007/s00216-017-0791-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 10/24/2017] [Accepted: 11/28/2017] [Indexed: 10/18/2022]
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