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Immunological differences between insect venom-allergic patients with and without immunotherapy and asymptomatically sensitized subjects
- Source :
- Allergy: European journal of allergy and clinical immunology
- Publication Year :
- 2018
-
Abstract
- BackgroundCurrently available tests are unable to distinguish between asymptomatic sensitization and clinically relevant Hymenoptera venom allergy. A reliable serological marker to monitor venom immunotherapy (VIT) does also not exist. Our aim was to find reliable serological markers to predict tolerance to bee and vespid stings. MethodsWe included 77 asymptomatically sensitized subjects, 85 allergic patients with acute systemic sting reactions, and 61 allergic patients currently treated with VIT. Levels of sIgE and sIgG(4) to bee and vespid venom, rApi m 1, and rVes v 5 were measured immediately after allergic sting reactions or before sting challenges and 4 weeks later. All sting challenges were tolerated. The inhibitory activity was determined using BAT inhibition and ELIFAB assay. ResultsMedian sIgG(4) levels were 96-fold higher in VIT patients (P < .001) while sIgE/sIgG(4) ratios were consistently lower (P < .001). The ELIFAB assay was paralleled by low sIgE/sIgG(4) ratios in VIT patients, showing markedly higher allergen-blocking capacity (P < .001). An almost complete inhibition of the basophil response was seen in all patients treated with vespid venom, but not in those treated with bee venom. Four weeks after the sting, sIgE and sIgG(4) levels were increased in allergic and asymptomatically sensitized patients, but not in VIT patients. ConclusionImmunological responses after stings varied in bee and vespid venom-allergic patients. In patients under VIT, sIgE and sIgG(4) remained completely stable after sting challenges. Monitoring VIT efficacy was only possible in vespid venom allergy, and the sIgG(4) threshold for rVes v 5 had the highest sensitivity to confirm tolerance. The BAT inhibition test was the most reliable tool to confirm tolerance on an individual basis.
- Subjects :
- 0301 basic medicine
Male
Allergy
medicine.medical_treatment
Venom
Basophil
Immunoglobulin E
0302 clinical medicine
Antibody Specificity
Immunology and Allergy
Sensitization
Arthropod Venoms
Aged, 80 and over
Immunoassay
biology
Middle Aged
medicine.anatomical_structure
Phenotype
Female
medicine.symptom
Adult
Adolescent
Immunology
complex mixtures
Asymptomatic
Sensitivity and Specificity
03 medical and health sciences
Young Adult
medicine
Hypersensitivity
Humans
Aged
business.industry
fungi
Insect Bites and Stings
Immunotherapy
Allergens
medicine.disease
eye diseases
Sting
030104 developmental biology
030228 respiratory system
Biological Variation, Population
Immunoglobulin G
Asymptomatic Diseases
biology.protein
Human medicine
business
Subjects
Details
- Language :
- English
- ISSN :
- 01054538
- Database :
- OpenAIRE
- Journal :
- Allergy: European journal of allergy and clinical immunology
- Accession number :
- edsair.doi.dedup.....aaa57edf10e8ccaf4456b68dfa165aae