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Featured researches published by Erna Van Hoeyveld.


The Journal of Allergy and Clinical Immunology | 1985

Stabilizing effect of epsilon-aminocaproic acid on allergenic extracts

Erna Van Hoeyveld; Erik Stevens

The effect of epsilon-aminocaproic acid (EACA) on the degradation of an aqueous Lolium perenne extract was studied by intracutaneous tests and by RAST inhibition. Extracts for skin testing stored at 4 degrees C for 12 months and at 37 degrees C for 6 weeks were significantly protected from degradation by addition of 0.1 mol/L of EACA before storage. Extracts were stored for RAST inhibition at 4 degrees C for 6 months and at 37 degrees C for 7 days. Shelf life was twofold to threefold increased when 0.1 mol/L of EACA was added to the dilution medium. EACA also protected the extracts from the effect of freezing and thawing. Comparison with the effect of human serum albumin indicated a rather short activity of human serum albumin, whereas the effect of EACA lasted longer. It is suggested that EACA can be used to increase the stability of aqueous allergen extracts for skin testing and for hyposensitization therapy.


Clinical Chemistry and Laboratory Medicine | 2018

Screening for connective tissue disease-associated antibodies by automated immunoassay

Philippe Willems; Ellen De Langhe; Jolien Claessens; Rene Westhovens; Erna Van Hoeyveld; Koen Poesen; Steven Vanderschueren; Daniel Engelbert Blockmans; Xavier Bossuyt

Abstract Background: Antinuclear antibodies (ANAs) are useful for the diagnosis of ANA-associated systemic rheumatic disease (AASRD). The objective of this study was the evaluation of an immunoassay that detects antibodies to a mixture of 17 antigens as an alternative to indirect immunofluorescence (IIF). Methods: Nine thousand eight hundred and fifty-six consecutive patients tested for ANAs were tested by IIF and EliA connective tissue disease screen (Thermo-Fisher). Medical records were reviewed for 2475 patients, including all patients that tested positive/equivocal by either test and a selection of 500 patients that tested negative. Results: Concordance between IIF and EliA was 83.1%. AASRD was found in 12.8% of IIF-positive patients, 30.2% of EliA-positive patients and 0.4%, 46.6%, 5.8% and 3.0% of patients that tested, respectively, double negative, double positive, single positive for EliA and single positive for IIF. The association with AASRD increased with increasing antibody level. IIF and EliA were positive in, respectively, 90.4% and 69.9% of systemic lupus erythematosus (n=83), 100% and 84.1% of systemic sclerosis (n=63), 86.7% and 93.3% of Sjögren’s syndrome (n=45), 88.2% and 52.9% of polymyositis/dermatomyositis (n=17), and in all cases of mixed connective tissue disease (n=8). The specificity was projected to be 94%–96% for EliA and 86% for IIF. When all AASRDs were taken together, the areas under the curve of receiver operator curves were similar between IIF and EliA. Conclusions: The positive predictive value for AASRD was higher for EliA than for IIF, but, depending on the disease, EliA might fail to detect antibodies that are detected by IIF. Combining immunoassay with IIF adds value.


The Journal of Allergy and Clinical Immunology | 1989

Analysis of the stabilizing effect of epsilon-aminocaproic acid by electrophoretic techniques and immunoblotting

Erna Van Hoeyveld; Monique Lejoly; Michel J.F. Walravens; Erik Stevens

The effect of epsilon-aminocaproic acid (EACA) on the degradation of aqueous pollen extracts was studied by isoelectric focusing, sodium dodecyl sulfate-polyacrylamide gel electrophoresis, and immunoblotting. The extracts were stored at 4 degrees C for 7 days and at 37 degrees C for 1, 4, and 7 days. Addition of 0.1 mol/L of EACA before storage partly protected the extract from degradation. The protective effect of EACA could be demonstrated most clearly by immunoblotting, suggesting that more epitopes were preserved in an antigenic configuration. The stabilizing effect increased with higher EACA concentrations.


International Journal of Chronic Obstructive Pulmonary Disease | 2017

Sensitization to Aspergillus fumigatus as a risk factor for bronchiectasis in COPD

Stephanie Everaerts; Katrien Lagrou; Adriana Dubbeldam; Natalie Lorent; Kristina Vermeersch; Erna Van Hoeyveld; Xavier Bossuyt; Lieven Dupont; Bart Vanaudenaerde; Wim Janssens

Background Bronchiectasis–chronic obstructive pulmonary disease (COPD) overlap presents a possible clinical phenotype of COPD, but it is unclear why it develops in a subset of patients. We hypothesized that sensitization to Aspergillus fumigatus (A fum) is associated with bronchiectasis in COPD and occurs more frequently in vitamin D-deficient patients. Methods This observational study investigated sensitization to A fum in an outpatient clinical cohort of 300 COPD patients and 50 (ex-) smoking controls. Total IgE, A fum-specific IgE against the crude extract and against the recombinant antigens and A fum IgG were measured using ImmunoCAP fluoroenzyme immunoassay. Vitamin D was measured by radioimmunoassay, and computed tomography images of the lungs were scored using the modified Reiff score. Results Sensitization to A fum occurred in 18% of COPD patients compared to 4% of controls (P=0.0110). In all, 31 COPD patients (10%) were sensitized to the crude extract and 24 patients (8%) had only IgE against recombinant antigens. A fum IgG levels were significantly higher in the COPD group (P=0.0473). Within COPD, A fum-sensitized patients were more often male (P=0.0293) and more often had bronchiectasis (P=0.0297). Pseudomonas aeruginosa and Serratia marcescens were more prevalent in historical sputum samples of A fum-sensitized COPD patients compared to A fum-non-sensitized COPD patients (P=0.0436). Vitamin D levels were comparable (P=0.2057). Multivariate analysis demonstrated that sensitization to recombinant f1 or f3 had a 2.8-fold increased risk for bronchiectasis (P=0.0030). Conclusion These results highlight a potential role for sensitization to A fum in COPD-related bronchiectasis.


Journal of The American Academy of Dermatology | 1993

α-Amylase, a flour additive: An important cause of protein contact dermatitis in bakers

Marie-Anne Morren; Veronique Janssens; A. Dooms-Goossens; Erna Van Hoeyveld; Ann Cornelis; Annie Heremans


Diagnostic Microbiology and Infectious Disease | 2018

Receiver operating characteristic curve analysis of four Aspergillus-specific IgG assays for the diagnosis of chronic pulmonary aspergillosis

Iain Page; Caroline G. Baxter; Christophe Hennequin; Malcolm D. Richardson; Erna Van Hoeyveld; Albert W. van Toorenenbergen; David W. Denning


Iranian Journal of Allergy Asthma and Immunology | 2018

Frequency and Pattern of IgE-mediated Sensitization to Aero and Food Allergens in Ahvaz, Province of Khuzestan in Southwestern Iran

Mohammad Shahrooei; Abbas Fayezi; Raheleh Shokouhi Shoormasti; Faramarz Zakavi; Leila Golpasand Hagh; Johan Van Eldere; Xavier Bossuyt; Erna Van Hoeyveld


European Respiratory Journal | 2017

Sensitisation to Aspergillus fumigatus as a risk factor for bronchiectasis in COPD

Stephanie Everaerts; Katrien Lagrou; Adriana Dubbeldam; Natalie Lorent; Kristina Vermeersch; Xavier Bossuyt; Erna Van Hoeyveld; Lieven Dupont; Bart Vanaudenaerde; Wim Janssens


European Respiratory Journal | 2015

Aspergillus fumigatus sensitization in COPD and smokers

Stephanie Everaerts; Erna Van Hoeyveld; Kristina Vermeersch; Lieven Dupont; Bart Vanaudenaerde; Xavier Bossuyt; Katrien Lagrou; Wim Janssens


Archive | 2004

Technical Note Detection of single nucleotide polymorphisms in the mannose-binding lectin gene using minor groove binder-DNA probes

Erna Van Hoeyveld; Frans Houtmeyers; Caroline Massonet; Leen Moens; Marc Van Ranst; Norbert Blanckaert; Xavier Bossuyt

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Xavier Bossuyt

Catholic University of Leuven

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Bart Vanaudenaerde

Katholieke Universiteit Leuven

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Katrien Lagrou

Katholieke Universiteit Leuven

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Kristina Vermeersch

Katholieke Universiteit Leuven

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Lieven Dupont

Katholieke Universiteit Leuven

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Stephanie Everaerts

Katholieke Universiteit Leuven

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Wim Janssens

Katholieke Universiteit Leuven

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Adriana Dubbeldam

Katholieke Universiteit Leuven

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Erik Stevens

Katholieke Universiteit Leuven

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Natalie Lorent

Institute of Tropical Medicine Antwerp

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