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A Versatile Terahertz Chemical Microscope and Its Application for the Detection of Histamine. PHOTONICS 2022. [DOI: 10.3390/photonics9010026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Terahertz waves have gained increasingly more attention because of their unique characteristics and great potential in a variety of fields. In this study, we introduced the recent progress of our versatile terahertz chemical microscope (TCM) in the detection of small biomolecules, ions, cancer cells, and antibody–antigen immunoassaying. We highlight the advantages of our TCM for chemical sensing and biosensing, such as label-free, high-sensitivity, rapid response, non-pretreatment, and minute amount sample consumption, compared with conventional methods. Furthermore, we demonstrated its new application in detection of allergic-related histamine at low concentration in buffer solutions.
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Irifuku R, Yanase Y, Kawaguchi T, Ishii K, Takahagi S, Hide M. Impedance-Based Living Cell Analysis for Clinical Diagnosis of Type I Allergy. SENSORS 2017; 17:s17112503. [PMID: 29088110 PMCID: PMC5713047 DOI: 10.3390/s17112503] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 10/23/2017] [Accepted: 10/27/2017] [Indexed: 01/11/2023]
Abstract
Non-invasive real time evaluation of living cell conditions and functions are increasingly desired in the field of clinical diagnosis. For diagnosis of type I allergy, the identification of antigens that induces activation of mast cells and basophils is crucial to avoid symptoms of allergic diseases. However, conventional tests, such as detection of antigen-specific IgE antibody and skin tests, are either of low reliability or are invasive. To overcome such problems, we hereby applied an impedance sensor for label-free and real-time monitoring of mast cell reactions in response to stimuli. When IgE-sensitized RBL-2H3 cells cultured on the electrodes were stimulated with various concentrations of antigens, dose-dependent cell index (CI) increases were detected. Moreover, we confirmed that the impedance sensor detected morphological changes rather than degranulation as the indicator of cell activation. Furthermore, the CI of human IgE receptor-expressing cells (RBL-48 cells) treated with serum of a sweat allergy-positive patient, but not with serum from a sweat allergy-negative patient, significantly increased in response to purified human sweat antigen. We thus developed a technique to detect the activation of living cells in response to stimuli without any labeling using the impedance sensor. This system may represent a high reliable tool for the diagnosis of type I allergy.
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Affiliation(s)
- Reiko Irifuku
- Department of Dermatology, Graduate School of Biomedical and Health Science, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551, Japan.
| | - Yuhki Yanase
- Department of Dermatology, Graduate School of Biomedical and Health Science, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551, Japan.
| | - Tomoko Kawaguchi
- Department of Dermatology, Graduate School of Biomedical and Health Science, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551, Japan.
| | - Kaori Ishii
- Department of Dermatology, Graduate School of Biomedical and Health Science, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551, Japan.
| | - Shunsuke Takahagi
- Department of Dermatology, Graduate School of Biomedical and Health Science, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551, Japan.
| | - Michihiro Hide
- Department of Dermatology, Graduate School of Biomedical and Health Science, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551, Japan.
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Zheng L, Fu Y, Jiang X, Man S, Ran W, Feng M, Liu S, Cheng X, Sui G. Microfluidic system for high-throughput immunoglobulin-E analysis from clinical serum samples. Talanta 2015; 143:83-89. [PMID: 26078132 DOI: 10.1016/j.talanta.2015.05.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Revised: 05/03/2015] [Accepted: 05/06/2015] [Indexed: 10/23/2022]
Abstract
Rapid and high-throughput analytical techniques for IgE that requires a small serum amount are very important, especially for pediatric patients. In these patients, blood is collected from veins, which is painful compared to fingertip blood collection. Herein, a novel microfluidic system capable of high-throughput parallel analyses of allergen-specific IgE from small amounts of patient serum was successfully developed. A six-plex immunoassay was constructed within a microfluidic chip, and the entire system was validated using samples from clinical patients. Major antigens from house dust mite (Dermatophagoides farinae and Blomia tropicalis), cat (Felis domesticus), fungus (Cladosporium herbarum), ragweed (Humulus japonicas), and tree pollen (Platanus acerifolia) were used as analysis targets. Sample consumption decreased to <0.05 µL compared with the 480µL serum consumption by fluoroenzyme immunoassay (UniCAP system Pharmacia Diagnostics AB, Uppsala, Sweden), the 50 µL serum consumption by enzyme-linked immune sorbent assay (ELISA), or the 1.5 µL serum consumption by conventional protein chip analysis. Analysis duration, reagent cost, and total cost for each measurement were also considerably decreased. The assay showed good accuracy and sensitivity toward the clinical samples. A significant correlation of allergen-specific IgE levels was found among the microfluidic assay, UniCAP system, and ELISA.
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Affiliation(s)
- Lulu Zheng
- Shanghai Key Laboratory of Atmospheric Particle Pollution Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, 220 Handan Road, Shanghai 200433, PR China
| | - Yongfeng Fu
- Department of Medical Microbiology and Parasitology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, PR China
| | - Xiran Jiang
- Shanghai Key Laboratory of Atmospheric Particle Pollution Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, 220 Handan Road, Shanghai 200433, PR China
| | - Suqin Man
- Department of Medical Microbiology and Parasitology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, PR China
| | - Wei Ran
- Department of Medical Microbiology and Parasitology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, PR China
| | - Meng Feng
- Department of Medical Microbiology and Parasitology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, PR China
| | - Sixiu Liu
- Shanghai Key Laboratory of Atmospheric Particle Pollution Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, 220 Handan Road, Shanghai 200433, PR China
| | - Xunjia Cheng
- Department of Medical Microbiology and Parasitology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, PR China; Institute of Biomedical Science, Fudan University, Shanghai 200433, PR China.
| | - Guodong Sui
- Shanghai Key Laboratory of Atmospheric Particle Pollution Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, 220 Handan Road, Shanghai 200433, PR China; Institute of Biomedical Science, Fudan University, Shanghai 200433, PR China.
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Lambert C, Sarrat A, Bienvenu F, Brabant S, Nicaise-Roland P, Alyanakian MA, Apoil PA, Capron C, Couderc R, Evrard B, Jaby D, Hémont C, Lainé C, Lelong M, Mariotte D, Martinet J, Rénier G, Sainte-Laudy J, Tabary T, Treiner E, Uring-Lambert B, Vigneron C, Vivinus M, Witthuhn F, Vitte J. The importance of EN ISO 15189 accreditation of allergen-specific IgE determination for reliable in vitro allergy diagnosis. Allergy 2015; 70:180-6. [PMID: 25394543 DOI: 10.1111/all.12546] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/09/2014] [Indexed: 01/05/2023]
Abstract
BACKGROUND Allergen-specific serum immunoglobulin E detection and quantification have become an important step in allergy diagnosis and follow-up. In line with the current trend of laboratory test accreditation to international standards, we set out to design and assess an accreditation procedure for allergen-specific serum IgE. METHODS Method validation according to the accreditation procedure under the EN ISO 15189 standard was carried out for allergen-specific immunoglobulin E determination using the fluoroimmunoenzymatic method ImmunoCAP(®) (ThermoFisher). Data were produced by 25 hospital laboratories in France. A total of 29 allergen specificities including mixes, extracts, and molecular allergens were assayed. Allergen-specific serum immunoglobulin E concentrations ranged from 0.1 to 100 kUA /l. RESULTS Repeatability, reproducibility, and accuracy results fulfilled method validation criteria for automated laboratory tests and proved similar irrespective of the allergen specificity, allergen-specific serum immunoglobulin E concentration, or individual laboratory. CONCLUSION Allergen-specific serum immunoglobulin E determination with the fluoroimmunoenzymatic method ImmunoCAP(®) is a highly repeatable, reproducible, and accurate method which may be considered as a single analyte assay in view of the EN ISO 15189 accreditation procedure.
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Affiliation(s)
- C. Lambert
- Laboratoire d'Immunologie; Pôle de Biologie-Pathologie; CHU St Etienne; Saint-Etienne France
| | - A. Sarrat
- Laboratoire Immunologie-Immunogénétique; Hôpital Pellegrin; CHU Bordeaux; Bordeaux France
| | - F. Bienvenu
- Laboratoire d'Immunologie; CH Lyon-Sud; CHU Lyon; Hospices Civils de Lyon; Pierre-Bénite France
| | - S. Brabant
- Laboratoire d'Immunologie; CHRU Lille; Lille France
| | - P. Nicaise-Roland
- UF d'Immunologie Autoimmunité et Hypersensibilités; Hôpital Bichat Claude Bernard, AP-HP; Paris France
| | - M.-A. Alyanakian
- Laboratoire d'Immunologie Biologique; Hôpital Universitaire Necker Enfants-Malades, AP-HP; Paris France
| | - P.-A. Apoil
- Laboratoire d'Immunologie; Pôle de Biologie; Hôpital de Rangueil; CHU Toulouse; Toulouse France
| | - C. Capron
- Laboratoire d'Hématologie Immunologie; Hôpital Ambroise-Paré; Boulogne Billancourt; France
| | - R. Couderc
- Service de Biochimie et Département d'Immunologie; Hôpital Armand Trousseau; Groupe Hospitalier HUEP, AP-HP; Paris France
| | - B. Evrard
- Laboratoire d'Immunologie CHU Clermont-Ferrand; Clermont-Ferrand France
| | - D. Jaby
- Laboratoire de Biochimie Immunologie Hôpital Delafontaine; CH Saint-Denis; Saint-Denis France
| | - C. Hémont
- Laboratoire d'Immunologie; CHU Nantes; Nantes France
| | - C. Lainé
- Laboratoire Immunologie Cellulaire - Allergologie; Hôpital Pontchaillou; CHU Rennes; Rennes France
| | - M. Lelong
- Laboratoire de Biochimie; CH Le Mans; Le Mans France
| | - D. Mariotte
- Laboratoire d'Immunologie et Immunopathologie; CHU Clemenceau; Caen France
| | - J. Martinet
- Department of Immunology; Rouen University Hospital; Rouen France
| | - G. Rénier
- Laboratoire d'Immunologie et d'Allergologie; CHU Angers; Angers France
| | - J. Sainte-Laudy
- Laboratoire d'immunologie; Hôpital Dupuytren; CHU Limoges; Limoges France
| | - T. Tabary
- Laboratoire d'Immunologie; Hôpital Robert Debré; CHU Reims; Reims France
| | - E. Treiner
- Laboratoire d'Immunologie; Hôpital Sud; CHU Amiens; Amiens France
| | - B. Uring-Lambert
- Laboratoire d'Immunologie; NHC; CHU Strasbourg; Strasbourg France
| | - C. Vigneron
- Laboratoire d'Immunologie; Hôpital Bretonneau; CHRU Tours; Tours France
| | - M. Vivinus
- Laboratoire d'Immunologie; Pôle de Biologie; Hôpital l'Archet 1; CHU Nice; Nice France
| | - F. Witthuhn
- Service Immunologie et Inflammation; Pôle Biologie Santé; CHU Poitiers; Poitiers France
| | - J. Vitte
- Laboratoire d'Immunologie; Assistance Publique Hôpitaux de Marseille; Marseille France
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Yanase Y, Hiragun T, Yanase T, Kawaguchi T, Ishii K, Kumazaki N, Obara T, Hide M. Clinical diagnosis of type I allergy by means of SPR imaging with less than a microliter of peripheral blood. SENSING AND BIO-SENSING RESEARCH 2014. [DOI: 10.1016/j.sbsr.2014.10.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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De Stefano A, Volpe G, Adornetto G, Bernardini S, Nuccetelli M, Gallucci G, Di Ruvo L, Moscone D. Development of a Very Sensitive ELIME Assay for Detection of sIgE to G5 and D2 Aeroallergens in Serum Samples. ELECTROANAL 2014. [DOI: 10.1002/elan.201300639] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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7
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Plebani M. Component-resolved diagnostics: laboratory results are not enough. Clin Chem Lab Med 2013; 51:1887-1888. [DOI: 10.1515/cclm-2013-0367] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Affiliation(s)
- Mario Plebani
- Department of Laboratory Medicine, University-Hospital of Padua, 35128 , Padua , Italy
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Yanase Y, Hiragun T, Yanase T, Kawaguchi T, Ishii K, Hide M. Application of SPR imaging sensor for detection of individual living cell reactions and clinical diagnosis of type I allergy. Allergol Int 2013; 62:163-9. [PMID: 23435561 DOI: 10.2332/allergolint.12-ra-0505] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2012] [Accepted: 11/07/2012] [Indexed: 12/23/2022] Open
Abstract
A technique to visualize living cell activation in a real time manner without any labeling is required in the fields of life sciences and medicine. We have reported that surface plasmon resonance (SPR) sensors detect large changes of refractive index (RI) with living cells, such as mast cells, human basophils and lymphocytes. However conventional SPR sensors detect only an average change of RI with thousands of cells at detectable area on a sensor chip. Therefore, we developed an SPR imaging (SPRI) sensor with a CMOS camera and an objective lens in order to visualize RI of individual living cells and their changes upon stimuli. The SPRI sensor we developed could detect reactions of individual rat basophilic leukemia (RBL-2H3) cells and mouse keratinocyte cells in response to specific or nonspecific stimuli. Moreover, the sensor could detect the reactions of individual human basophils isolated from patients in response to antigens (allergens). Thus the technique can visualize the effect of various stimuli, inhibitors and/or conditions on cell reactions as change of intracellular RI distribution at single cell levels. Establishment of the technique to rapidly isolate cells from patient blood should enable us to utilize SPRI system as a high throughput screening system in clinical diagnosis, such as type I hypersensitivity and drug hypersensitivity, and as a tool to reveal novel phenomena in evanescent fields around plasma membranes.
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Affiliation(s)
- Yuhki Yanase
- Department of Dermatology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
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Olivier CE, Lima RPDS, Pinto DG, Santos RAPGD, Silva GKMD, Lorena SLS, Villas-Boas MB, Netto FM, Zollner RDL. In search of a tolerance-induction strategy for cow's milk allergies: significant reduction of beta-lactoglobulin allergenicity via transglutaminase/cysteine polymerization. Clinics (Sao Paulo) 2012; 67:1171-9. [PMID: 23070344 PMCID: PMC3460020 DOI: 10.6061/clinics/2012(10)09] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2012] [Revised: 04/24/2012] [Accepted: 06/19/2012] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVE To explore the use of β-lactoglobulin polymerized using microbial transglutaminase and heating to identify whether protein polymerization could reduce in vivo allergenicity and maintain in vitro and ex vivo immunoreactivity for use in tolerance-induction protocols. METHODS Based on previous protocols applied in mice and children, we performed in vivo challenges (using a skin prick test) with native and polymerized β-lactoglobulin in adult patients with an IgE-mediated allergy to plactoglobulin. In vitro humoral immunoreactivity was analyzed using immunoblotting. Cell-mediated immunoreactivity was analyzed using ex vivo challenges with native and polymerized β-lactoglobulin and monitored by leukocyte adherence inhibition tests. RESULTS The skin tests demonstrated that there was a significant reduction in immediate cutaneous reactivity after polymerization. Polymerization did not decrease the immunoblotting detection of s-IgE specific to β-lactoglobulin. Cell-mediated immunoreactivity, as assessed by ex vivo challenges and leukocyte adherence inhibition tests, did not exhibit significant differences between leukocytes challenged with native versus polymerized β-lactoglobulin. CONCLUSIONS The polymerization of β-lactoglobulin decreased in vivo allergenicity and did not decrease in vitro humoral or ex vivo cell-mediated immunoreactivity. Therefore, we conclude that inducing polymerization using transglutaminase represents a promising technique to produce suitable molecules for the purpose of designing oral/ sublingual tolerance induction protocols for the treatment of allergies.
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Affiliation(s)
- Celso Eduardo Olivier
- Laboratory of Immunology and Experimental Allergy, Department of Internal Medicine, Faculty of Medical Sciences, University of Campinas, Campinas/SP, Brazil
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van Toorenenbergen AW. Between-laboratory quality control of automated analysis of IgG antibodies against Aspergillus fumigatus. Diagn Microbiol Infect Dis 2012; 74:278-81. [PMID: 22925654 DOI: 10.1016/j.diagmicrobio.2012.07.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2012] [Revised: 07/12/2012] [Accepted: 07/16/2012] [Indexed: 11/28/2022]
Abstract
Measurement of IgG antibodies against Aspergillus fumigatus is an important criterion for the diagnosis of aspergilloma, allergic bronchopulmonary aspergillosis, and extrinsic allergic alveolitis. In the present study, we compared IgG antibody analysis against A. fumigatus using 2 widely used automated immunochemistry systems. In a between-laboratory quality control program, good agreement was found between the results from laboratories that used the ImmunoCAP system; however, a laboratory that used the Immulite 2000 system found approx. 2-fold higher antibody levels in the quality control samples than did the ImmunoCAP system. Measurements of IgG against A. fumigatus in patient sera were significantly correlated (r(s) = 0.77, P < 0.0001). These results demonstrate that analysis of IgG antibodies against A. fumigatus with these 2 systems has reached a level of standardization that allows for direct comparison of quantitative results from different laboratories. For longitudinal analysis of IgG against A. fumigatus, reagents from the same manufacturer should be used.
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Histamine release-neutralization assay for sera of patients with atopic dermatitis and/or cholinergic urticaria is useful to screen type I hypersensitivity against sweat antigens. Arch Dermatol Res 2012; 304:647-54. [DOI: 10.1007/s00403-012-1236-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2011] [Revised: 03/20/2012] [Accepted: 03/31/2012] [Indexed: 10/28/2022]
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12
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Evaluation of peripheral blood basophil activation by means of surface plasmon resonance imaging. Biosens Bioelectron 2012; 32:62-8. [DOI: 10.1016/j.bios.2011.11.023] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2011] [Revised: 10/29/2011] [Accepted: 11/12/2011] [Indexed: 12/26/2022]
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13
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Linden CC, Misiak RT, Wegienka G, Havstad S, Ownby DR, Johnson CC, Zoratti EM. Analysis of allergen specific IgE cut points to cat and dog in the Childhood Allergy Study. Ann Allergy Asthma Immunol 2011; 106:153-158.e2. [PMID: 21277517 DOI: 10.1016/j.anai.2010.11.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2010] [Revised: 10/25/2010] [Accepted: 11/02/2010] [Indexed: 11/24/2022]
Abstract
BACKGROUND The application of a single allergen specific IgE (sIgE) cut point, such as 0.35 kU/L, to determine sensitization for all allergens may be suboptimal. OBJECTIVES To analyze self-reported symptoms suggestive of dog and cat allergy in relation to the test performance characteristics of low level, but reliably detectable, sIgE and to compare these cut points to the traditional 0.35-kU/L cut point. METHODS Interviews and blood samples were collected among 564 young adult participants of a general risk birth cohort. Data collected from the participants' parents were analyzed as validation populations. A history of symptoms consistent with allergy on exposure to pets was obtained by standardized questionnaire. Allergen sIgE levels for dog and cat were evaluated with Pharmacia CAP. Receiver operating characteristic curves were constructed and the performance characteristics of the traditional sIgE cut point of 0.35 kU/L were compared with cut points as low as 0.1 kU/L. RESULTS Using the Youden J criteria, based on the highest sum of sensitivity and specificity for a diagnostic test, cut points of 0.12 kU/L for cat and 0.2 kU/L for dog were identified as performing optimally among the participant population. In 2 validation populations, consisting of the participants' mothers and fathers, the performance of these alternative cut points were superior or similar to the traditional 0.35-kU/L sIgE level. CONCLUSIONS Accurately measured sIgE at levels approaching the lower limit of detection of current assays may be useful in confirming sensitization. Optimal clinical application of these tests will continue to require careful integration of the result and the strength of the patient's history.
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Guilloux L, Benoit Y, Aimone-Gastin I, Ponvert C, Beaudouin E. [Control of the biological diagnostic assessment. Immunoglobulin E]. ANNALES FRANCAISES D'ANESTHESIE ET DE REANIMATION 2011; 30:294-304. [PMID: 21392931 DOI: 10.1016/j.annfar.2010.12.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Affiliation(s)
- L Guilloux
- Unité d'immuno-allergologie, laboratoire Mérieux, avenue Tony-Garnier, Lyon, France.
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15
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Suzuki H, Yanase Y, Tsutsui T, Ishii K, Hiragun T, Hide M. Applying surface plasmon resonance to monitor the IgE-mediated activation of human basophils. Allergol Int 2008; 57:347-58. [PMID: 18797180 DOI: 10.2332/allergolint.o-07-506] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2007] [Accepted: 04/28/2008] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND The histamine releasing test which detects histamine released from basophils in vitro is safe, sensitive and widely used for clinical examination in the field of allergy. However, basophils of certain individuals do not release histamine, because of dysfunctions in their intracellular signal transduction (non-responder). To overcome potential shortcomings of the histamine releasing test, we applied surface plasmon resonance (SPR) to detect the activation of basophils. METHODS Basophils of patients with allergy, and those of non-allergic volunteers were isolated from peripheral blood. A batch of basophils obtained from a healthy volunteer was treated with lactic acid and IgE of a patient with atopic dermatitis in order to replace their endogenous IgE. They were fixed on the sensor chip of the SPR apparatus, pretreated with or without various inhibitors for intracellular signal transduction, and exposed to the antigens or anti-IgE antibody. RESULTS When basophils were sensitized with antigen specific IgE, they immediately caused the increase of resonance angle (AR) in response to either anti-IgE antibody or corresponding antigens, even when they did not release histamine. Moreover, the dose dependent reactions of basophils were reflected by the increase of AR as well as the release of histamine. The increase of AR in response to anti-IgE antibody was reduced by pre-treatment of basophils with inhibitors for intracellular signal transduction, but not more than the level for histamine release. CONCLUSIONS SPR biosensors may be superior to the histamine release test for studying functions of human basophils including those not releasing histamine.
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Affiliation(s)
- Hidenori Suzuki
- Department of Dermatology, Graduate School of Biomedical Sciences, Hiroshima University, Hiroshima, Japan
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16
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Zhou Q, Shen Z, Li S, Li X, Wang W, Wang Z. Robust and traditional statistical methods in the establishment of immunoglobulin E target values in external quality assessment program. Clin Chim Acta 2008; 387:66-70. [PMID: 17915202 DOI: 10.1016/j.cca.2007.09.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2007] [Revised: 09/05/2007] [Accepted: 09/06/2007] [Indexed: 10/22/2022]
Abstract
BACKGROUND In an EQA scheme, peer group mean is conventionally regarded as the target after removing values exceeding the mean+/-3SD. However, this computation fails if there are some outliers. METHODS The outliers in each original data set were separately deleted by traditional and robust statistical methods. The data distributions of original and trimmed data sets were separately tested by Shapiro-Wilks or Kolmogorov-Smirnov Z test. The means of peer groups were used to set IgE targets. The difference between targets set by both methods was tested by 1-sample t test. RESULTS The original data sets were not all Gaussian distributed. After deletion of outliers using robust statistical method, the modified data sets of all tested groups were normally distributed. IgE targets established by robust and traditional methods were significantly different in some groups. The incompatible IgE targets derived all from the original and trimmed data sets which were not Gaussian distributed. CONCLUSIONS The premise for choosing a traditional method to delete outliers and using peer group means as targets was that the data sets must be Gaussian distributed. The reasons that caused the targets to be incompatible possibly were the 2 rules to be broken. Robust statistical method was used for deletion of outliers due to the distorted distribution.
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Affiliation(s)
- Qi Zhou
- Beijing Hospital, National Center for Clinical Laboratories, Beijing 100730, PR China.
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17
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Pekkarinen PT, von Hertzen L, Laatikainen T, Mäkelä MJ, Jousilahti P, Kosunen TU, Pantelejev V, Vartiainen E, Haahtela T. A disparity in the association of asthma, rhinitis, and eczema with allergen-specific IgE between Finnish and Russian Karelia. Allergy 2007; 62:281-7. [PMID: 17298345 DOI: 10.1111/j.1398-9995.2006.01249.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND A substantial variation in the association of asthma, rhinitis and eczema with elevated serum allergen-specific immunoglobulin E (sIgE) levels between different populations has been reported. Here, we wanted to clarify whether these proportions are different in Finnish and Russian Karelia, and compared the ability of questionnaires, skin prick tests (SPT) and sIgE measurements to detect atopic conditions in these adjacent areas with different living conditions. METHODS Randomly selected schoolchildren, aged 6-16 years, and their mothers from Finland (n = 344 children, 344 mothers) and Russia (427 and 284 respectively) participated. SPTs and sIgE measurements to common inhalant and food allergens were performed. The occurrence of asthma, rhinitis, eczema and related symptoms was assessed with an International Study of Asthma and Allergies in Childhood-based questionnaire. Correlation between SPT and sIgE was estimated using the Spearman correlation coefficient. RESULTS The rate of positive sIgE results was significantly higher in Finland among both mothers and children. Seventy-seven per cent of Finnish children and 43% of Russian children with asthma were sIgE positive. The respective figures for hay fever were 94% and 67%, and for eczema 68% and 41%. This discrepancy was similar but of lower magnitude among mothers. The overall occurrence of asthma, rhinitis and eczema was very low in Russian Karelia. The correlation between SPT and sIgE results was generally good. CONCLUSION Asthma, rhinitis and eczema in Russian Karelia are not only rare but also, to a large extent, have no sIgE component. Therefore, the ability of questionnaires to detect sIgE-mediated atopic conditions in this area of Russia is poor.
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Affiliation(s)
- P T Pekkarinen
- Department of Epidemiology and Health Promotion, National Public Health Institute, Helsinki, Finland
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Borghesan F, Bernardi D, Plebani M. In vivo and in vitro allergy diagnostics: it's time to reappraise the costs. Clin Chem Lab Med 2007; 45:391-5. [PMID: 17378739 DOI: 10.1515/cclm.2007.077] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND The in vivo skin prick test (SPT) is widely considered less expensive than in vitro gamma-immunoglobulin E (IgE) determination in the diagnosis of allergy. The aim of the present paper is to evaluate the relevance of component-resolved in vitro diagnosis in comparison to extract-based diagnosis and the relative global costs in relation to clinical outcomes. METHODS For 50 individuals with suspected seasonal allergic rhinitis, we compared the costs of skin testing with those of specific IgE antibody measurement. RESULTS The costs were higher for in vitro than in vivo testing. However, the clinical information obtained using recombinant reagents allowed correct identification of the sensitizing molecule. CONCLUSIONS Recombinant allergens for specific IgE in vitro measurement provide more reliable information for immunotherapy prescription. This should be translated into a significant reduction in the overall costs sustained by the healthcare system.
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Affiliation(s)
- Franco Borghesan
- Department of Laboratory Medicine, University Hospital of Padova, Padova, Italy
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Bertino E, Bisson C, Martano C, Coscia A, Fabris C, Monti G, Testa T, Conti A. Relationship between maternal- and fetal-specific IgE. Pediatr Allergy Immunol 2006; 17:484-8. [PMID: 17014621 DOI: 10.1111/j.1399-3038.2006.00449.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
AIM A positive correlation between maternal and cord-blood IgE levels is well documented for total IgEs, but not for specific IgEs. The difficulty in detecting specific cord-blood IgEs is due to their low concentrations, which hinder their dosage by low-sensitivity methods. The study aimed to correlate maternal and foetal specific IgEs against individual cow's milk proteins, detected by highly sensitive and specific techniques. METHODS Cow's milk specific IgE detection was performed by chemiluminescence on 52 specimens of maternal and cord blood after cow's milk protein separation by 1D and 2D gel electrophoresis. Cow's milk protein (CMP) antigens were identified by mass spectrometry techniques. RESULTS Specific IgEs for CMPs were found in 25/52 (48.1%) of maternal sera and in 19/52 (37%) of cord-blood sera. In order of decreasing frequency, the proteins found were BSA, IgG heavy chain, caseins and, in a single case, b-lactoglobulin. Positive cord-blood sera in all cases corresponded to a positive maternal result, and maternal and foetal immunoreactivity patterns were closely correlated. Moreover, in no case was there a positive cord-blood response with a negative maternal response. CONCLUSION The study demonstrates a close relationship between maternal and cord-blood specific IgE patterns. The phenomenon observed could provide a model to elucidate the general production method of foetal IgEs, which might only be produced in the presence of both the corresponding maternal IgE and the related allergen.
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Affiliation(s)
- Enrico Bertino
- Neonatal Unit, Department of Pediatric Sciences, University of Turin, Piazza Polonia 94, Turin, Italy.
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Plebani M, Marincola FM. Research translation: a new frontier for clinical laboratories. Clin Chem Lab Med 2006; 44:1303-12. [PMID: 17087640 DOI: 10.1515/cclm.2006.238] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractTranslational research and translational medicine (referred to hereafter as translational research) are interchangeable terms that underline the pressing need to translate into practical benefits for those affected by disease the extensive investments divested by the private and public sectors in biomedical research. For people more directly involved in clinical practice (physicians, clinical laboratory professionals and patients), translational research responds to the need to accelerate the capture of benefits of research, closing the gap between what we know and what we practice. This basically means the transfer of diagnostic and therapeutic advances proven effective in large, well-conducted trials (and, therefore, evidence-based) to daily medical practice. Translational research should be regarded as a two-way road: bench to bedside, and bedside to bench. In particular, to make possible a more effective translation process, a new road map should be implemented through interaction and cooperation between basic researchers, clinicians, laboratory professionals and manufacturers. Some examples of recent developments in clinical laboratory testing, including markers of cardiovascular diseases, clinical proteomics and recombinant allergens, may explain the importance of careful evaluation of all variables that allow the introduction of such new insights into clinical practice to assure better clinical outcomes. The vital role of laboratory medicine in the delivery of safer and more effective healthcare requires more careful evaluation not only of the analytical characteristics, but also of any other variable that may affect the clinical usefulness and diagnostic performances of laboratory tests, thus allowing more accurate interpretation and utilization of laboratory information.Clin Chem Lab Med 2006;44:1303–12.
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Affiliation(s)
- Mario Plebani
- Department of Laboratory Medicine, University Hospital of Padova, and Center of Biomedical Research, Castelfranco Veneto TV, Italy.
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Cobbaert CM, Jonker GJ. Allergy testing on the IMMULITE 2000 Random-Access immunoanalyzer - a clinical evaluation study. Clin Chem Lab Med 2005; 43:772-81. [PMID: 16207141 DOI: 10.1515/cclm.2005.132] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
PURPOSE We aimed to evaluate the diagnostic performance of the IMMULITE 2000 Allergy System from Diagnostic Products Corporation (DPC) for the detection of inhalant and food allergies, focusing on inhalant and food screens, mixes and single allergens. METHODS Serum samples were collected from new, unselected patients who were referred to the allergist for a suspected allergy. Patients were classified as study diagnosis-positive for inhalant (food) allergy if they had both a positive clinical examination/history and a positive skin test for inhalant (food) allergy; otherwise - failing one or both of these criteria - they were classified as study diagnosis-negative. Classification and testing of the serum samples was carried out in a blinded fashion. Values greater than 0.35 kU/L were considered positive. RESULTS Of the 118 patients included, 63 were considered study diagnosis-positive for inhalation and/or food allergy. DPC inhalation screening showed 82% total agreement (TA) and 91% sensitivity relative to the study diagnoses. The DPC food panel showed 96% TA and 98% specificity relative to the study diagnoses. Relative to specific intracutaneous testing (ICT), the DPC D1, E1 and E5 assays had sensitivity of 82-90%; tree and grass panels had sensitivity of 74% and 95%. The DPC weed panel and initial lots of DPC E5 had poor sensitivity (<40%); mold panel sensitivity was equally low for both DPC and the routinely used Pharmacia assay (36%). Relative to skin prick testing (SPT), specific food allergens had TA of 94-98% and specificity of 95-100%. CONCLUSION In patients classified by the combination of clinical examination/history and skin test results, the DPC IMMULITE 2000 Allergy System generally demonstrated acceptable sensitivity, specificity and TA compared to the study diagnoses, both at the screening level and at the level of panels and single allergens.
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Affiliation(s)
- Christa M Cobbaert
- Department of Clinical Chemistry, Amphia Hospital, Location Langendijk, Breda, The Netherlands.
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