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Cap feia

Manufactured by Thermo Fisher Scientific
Sourced in Sweden

The CAP-FEIA is a lab equipment product that performs fluorescent enzyme immunoassay (FEIA) analysis. It is used for the quantitative determination of specific proteins or other analytes in biological samples.

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6 protocols using cap feia

1

Eosinophilic Granulomatosis with Polyangiitis Evaluation

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Among patients referred to our immunology clinic from January 2010 to December 2021, patients fulfilling the 1990 ARA EGPA classification criteria were enrolled (Figure 1). Demographic, clinical and laboratory data were retrieved from their clinical records. The blood eosinophil count (BEC), total IgE (CAP-FEIA, ThermoFisher, Uppsala, Sweden), atopic status, eosinophil cationic protein (ECP, CAP-FEIA, ThermoFisher, Uppsala, Sweden) and ANCA (EUROPLUS Granulocyte Mosaic 25, IFA, Euroimmun, Lubeck, Germany; EliaTM MPOS, EliaTM PR3S, ThermoFisher, Uppsala, Sweden) were analyzed at the baseline. Atopy was defined as skin test positivity and/or documented serum-specific IgE for inhalant allergens. All patients underwent nasal endoscopy and a head computed tomography (CT) scan to investigate sino-nasal involvement at the baseline. Lung involvement was assessed with a chest CT scan at the baseline in all patients. All patients were screened for heart involvement by transthoracic echocardiography; more advanced heart assessments, such as cardiac magnetic resonance (MRI) or coronary angiography, were performed according to the patients’ clinical needs. All patients were screened for kidney involvement using laboratory (serum creatinine and urinalysis) and ultrasound assessment. Other clinical actions were physician-assessed.
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2

Characterization of Wheat Allergic Patients

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Sera were obtained from European wheat food allergic patients (Austria n = 1; Finland: n = 3; Greece: n = 6; total: n = 10) aged 3–41 years (mean age 12 years). Patients were diagnosed on the basis of a case history demonstrating that allergic symptoms (airway symptoms, gastrointestinal symptoms, skin symptoms, systemic anaphylaxis) were unambiguously related to the ingestion of wheat or wheat-containing products. A grading of symptoms and definition of anaphylaxis was performed according to the international position paper and recommendations for the definition of anaphylaxis (Table 1). [20] (link) In six of the patients, open food challenge was performed and positive challenge results were obtained. Skin prick tests with wheat seed extract were performed and positive in each of the wheat allergic patients. For each patient IgE-mediated sensitization to wheat was confirmed by measurements of allergen-specific IgE (CAP-FEIA, Thermofisher, Uppsala, Sweden). Patients were further characterized for their reactivity to the two major wheat food allergens omega-5-gliadin (Tri a 19) and LMW glutenin (Tri a 36). [21] (link)
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3

Identification of Allergen-Specific T Cell Clones

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In order to identify antigen specific clones, specific T cell lines (TCL) were grown for three weeks from PBMC extracted from the same set of patients in the presence of allergen extracts (purchased at ALK, Horsholm, Denmark, Citeq Biologicals, Groningen, The Netherlands, and the National Institute for Biological Standards and Control (NIBSC), South Mimms, Great Britain) according to an established protocol 60 . Allergen extracts were selected based on each patient's specific IgE titers as measured by CAP Feia (Thermo Scientific, Massachusetts, USA) towards the tested allergens, namely birch pollen, house dust mite, rye pollen, and grass pollen.
Allergen-specific IgE-titers of >3.19 kU/I were regarded as relevant. Antigen-specificity of each cell line was approved after 21 days by re-stimulation testing. Therefore, respective antigenpresentation by irradiated autologous antigen-presenting cells was followed by proliferation testing by 3 H-thymidine incorporation. Finally, DNA was extracted and used for TCR sequencing. PBMC cultured in the absence of antigens served as controls.
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4

Alternaria-induced Allergic Rhinitis Study

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Eight patients from Austria suffering from allergic rhinitis, conjunctivitis and/or asthma due to A. Alternata sensitization were diagnosed based on a positive case history and the presence of specific IgE antibody levels >3.5 kUA/l to A. alternata (corresponding to RAST ≥3) as determined by CAP-FEIA (Phadia, Uppsala, Sweden). Residual serum samples from routine diagnostic procedures were tested in an anonymized manner with approval from the ethics committee of the Medical University of Vienna (EkWr: 565/2007).
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5

Serum IgE Detection for Atopy

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This method is also described in detail elsewhere(Baatjies et al. 2009 (link)). In brief, blood samples were obtained from the participants for serum-specific immunoglobulin IgE. Sera were tested to determine the presence of atopy using Phadiatop® test (ImmunoCAP 100 System; Phadia, Uppsala, Sweden). The sera were also tested for specific IgE to flour dust allergens such as wheat (f4), rye (f5) and fungal a-amylase (k87) using fluorescence enzyme immunoassay (CAP-FEIA) according to the manufacturer’s instructions (Phadia). Results were treated as a continuous or binary variable in which ImmunoCAP ≥ 0.35 kU/L) was considered positive.
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6

Alternaria-induced Allergic Rhinitis Study

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Eight patients from Austria suffering from allergic rhinitis, conjunctivitis and/or asthma due to A. Alternata sensitization were diagnosed based on a positive case history and the presence of specific IgE antibody levels >3.5 kUA/l to A. alternata (corresponding to RAST ≥3) as determined by CAP-FEIA (Phadia, Uppsala, Sweden). Residual serum samples from routine diagnostic procedures were tested in an anonymized manner with approval from the ethics committee of the Medical University of Vienna (EkWr: 565/2007).
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