- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02908360
Study of the Frequency and of the Regulatory Function of Positive T Lymphocytes Dual CD4CD8aa (DP8a) Specific to a Bacteria of the Intestinal Microbiota (Faecalibacterium Prausnitzii) in Atopic Dermatitis, Asthma and Allergic Rhinitis (Prévall-DP)
The prevalence of allergic diseases (atopic dermatitis, asthma, rhinitis, conjunctivitis and food allergy) has increased dramatically in industrialized countries over the last 20-30 years.
Allergic diseases are present especially in children and young adults, but all age groups are affected, with variations across countries and age. To propose new therapies, the investigators must first understand the physiopathology.
Since their discovery the regulatory T cells have continued to be the subject of work to understand their role in maintaining immune homeostasis in the human body but also their involvement in autoimmune diseases, inflammatory diseases, transplants of solid organs or fluids and allergic diseases.
It was identified two broad classes of regulatory T cells:
- T cells = natural regulators acquisition of a phenotype and a regulatory function right out of the thymus ( CD25 + / CD127 + low / FoxP3 +).
- T cells induced regulators = acquisition of a phenotype and a regulatory function on the periphery depending on the cytokine micro-environment.
Phenotypic characterization of these is less obvious and even more so than during the last ten years several induced regulatory T cell populations have been described ( eg, Tr1 ).
A new subpopulation of T cells induced in patients with inflammatory bowel disease recently identified have a particular phenotype as bearing the CD4 and CD8 double marking with a regulatory phenotype.
These regulatory T cells are also induced a specific of a commensal intestinal bacterium (Faecalibacterium prausnitzii).
Regarding allergies, it has been widely demonstrated a relationship between changes of the intestinal microbiota and the occurrence of allergic diseases.
The investigators would therefore propose a cross-sectional study, single-center, controlled, single blinded to study the role of T cells called double positive induced regulators DP8 to compare the frequency and the regulatory function of specific DP8 of Faecalibacterium prausnitzii in atopic dermatitis, asthma and allergic rhinitis compared to control samples.
Study Overview
Status
Conditions
Detailed Description
Study Type
Enrollment (Actual)
Contacts and Locations
Study Locations
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Pays De La Loire
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Nantes, Pays De La Loire, France, 44000
- Nantes University Hospital
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Description
Inclusion Criteria:
- non smoker
- BMI <30kg/m²
- No contraindication to prick-test
- Inform consent signed for genetics
- belong to a social security scheme
- patients with allergic rhinitis or atopic dermatitis or with allergic asthma
Exclusion Criteria:
- major or major incapable protected
- antimicrobial treatment (antibiotic, antifungal or antiviral)
- in contact with an MDR bacteria
- has received or is receiving specific immunotherapy
- History of cancer of the hematopoietic system
- antecedent acquired immune deficiency with HIV
- congenital immunodeficiency
- inflammatory bowel disease
- autoimmune disease and / or inflammatory
- solid organ transplant or hematopoietic cells
- addict
- pregnant or of childbearing age without effective contraception
- failure of acute or chronic severe organ
- hardly speak French and / or difficult to understand French
Study Plan
How is the study designed?
Design Details
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
Patients with allergic rhinitis
Patients with rhinitis and / or allergic conjunctivitis duly diagnosed according to the ARIA criteria
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|
Patients with atopic dermatitis
The patient has moderate classified atopic dermatitis (SCORAD 25 to 50) or severe (SCORAD> 50).
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Patients with allergic asthma
The patient has allergic asthma diagnosed according to the criteria GINA21
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
average percentage of double positive T cells CD4 + / CD8 + compared to the average percentages of total T lymphocytes (CD3 +), CD4 + and the total number of peripheral blood formed elements
Time Frame: 3 months
|
Intermediate biospecimen storage and preparation before centralized analyses
|
3 months
|
Collaborators and Investigators
Sponsor
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
- Skin Diseases
- Infections
- Respiratory Tract Infections
- Respiratory Tract Diseases
- Immune System Diseases
- Lung Diseases
- Hypersensitivity, Immediate
- Bronchial Diseases
- Genetic Diseases, Inborn
- Otorhinolaryngologic Diseases
- Skin Diseases, Genetic
- Lung Diseases, Obstructive
- Respiratory Hypersensitivity
- Hypersensitivity
- Nose Diseases
- Skin Diseases, Eczematous
- Asthma
- Dermatitis
- Rhinitis
- Rhinitis, Allergic
- Eczema
- Dermatitis, Atopic
Other Study ID Numbers
- RC14_0372
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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