Feasibility Study of a New Immunoglobulin E (IgE) Assay Method

Study Overview
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Brief Summary
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The main objective is to study the feasibility of a new specific IgE assay using a bioluminescence technique in a pediatric and adult allergic population. For this, we will collect blood, and urine during a blood test scheduled for the follow-up of the patient.

Detailed Description
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Allergy is a raising public health problem. Specific IgE assays are useful tools to investigate the physiopathology of allergies. This method is achieved mainly by the ImmunoCAP enzyme immunoassay technique. This is an expensive test that requires a significant amount of blood. This is a limitation particularly in children. The time to get the results is long and a second consultation has to be scheduled in order to communicate the results to the patients. The main objective of this study is to assess the feasibility of a new specific IgE assay, named LuLISA, using a bioluminescence technique in urine and blood samples from pediatric and adult allergic population. This technique was recently published for the quantification of IgE against two peanut allergens and needs to be extended for the detection of other major allergens. A secondary objective is the evaluation of the time needed to obtain results.

Official Title
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Feasibility Study of a New Immunoglobulin E (IgE) Assay Method in Urine and Blood

Conditions
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Allergy and Immunology

Intervention / Treatment
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* Biological: collection of blood and urine


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Males or females 6 months' old or older Sensitization or allergy towards a trophallergen, an aeroallergen, hymenoptera venom or drug proven by: positive skin test (s) and / or IgE specific (s)> 0.1 kUA / L and / or anamnesis in favor of an allergic reaction of mediated IgE Social coverage up to date Exclusion Criteria: Children younger than 6 months'old Children's weight less than 10 kg Pregnant or breastfeeding women Patients with cystic fibrosis Patients with dysimmune or autoimmune pathology Anamnesis in favor of a delayed allergy or a contact allergy.

Ages Eligible for Study
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Minimum Age: 6 Months
Maximum Age: 99 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| People with sensitization or allergy<br>blood and urine will be collected during a blood test scheduled for the follow-up of the patient | Biological: collection of blood and urine<br>* blood and urine will be collected during a blood test scheduled for the follow-up of the patient<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Estimation of the the correlation of specific IgE concentrations for a given allergen analyzed using two different methods | specific IgE concentrations for a given allergen will be measured by both LuLISA and ImmunoCAP and the results will be compared | Day 0 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| To study the correlation between the results of specific serum and urinary IgE dosages by LuLISA | specific IgE concentrations for a given allergen will be measured in the sera and the urine from the same patient and the results will be compared | Day 0 | 
| To study the correlation between the results of specific IgE dosages in the venous blood and the capillary blood | specific IgE concentrations for a given allergen will be measured in the venous blood and the capillary blood from the same patient and the results will be compared | Day 0 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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IgE assay, food allergy/ hypersensitivity, respiratory allergy/ hypersensitivity, hymenopter allergy/ hypersensitivity