Eosinophil Induced Remodelling in Asthma (ERA)
Allergic Asthma, Airway Remodelling
About this trial
This is an interventional basic science trial for Allergic Asthma focused on measuring asthma, eosinophils, airway smooth muscle, airway remodelling, integrins, cytokines
Eligibility Criteria
Inclusion Criteria:
- Men and women between the ages of 18-50 years;
Allergic asthma and sensitization to house dust mites (D. pteronyssinus) allergen, approved with:
2.1. Medical history and symptoms more than one year and 2.2. skin prick test positive for D. pteronyssinus (positive wheals are those exceeding 3mm in diameter greater than the negative control) and 2.3. Positive bronchial challenge with methacholine or documented completely reversible bronchial obstruction;
- Stable lung function (FEV1≥70 perc.);
- Postmenopausal women. Premenopausal women if pregnancy test is negative and they agree to use an effective contraceptive measures during the study;
- Healthy subjects without allergic and other chronic respiratory diseases (control group);
- Non- smokers;
- Participants who gave his/her informed written consent.
Exclusion Criteria:
- Asthma exacerbation 1 month prior to study
- Clinically significant permanent allergy symptoms (ex. cat or dog dander induced allergy)
- Contraindications to perform an allergy skin test and/or bronchial provocation test 3.1. Active airway infection 1 month prior the study; 3.2. Used medicaments: 3.2.1. Inhaled glucocorticoids intake 1 month prior the study; 3.2.2. Antihistamines intake 7 days prior the study; 3.2.3. Short acting β2 agonists 12 hours prior the study; 3.2.4. Long acting β2 agonists 2 days prior the study; 3.2.5. Leukotriene receptor antagonists prior 14 days;
- If the histamine mean wheal diameter is <= 3 mm or control mean wheal diameter is >= 3 mm;
- Contraindications for epinephrine;
- Other significant mental and / or internal diseases and conditions, which could be as exclusion criteria due to the opinion of the researcher;
- Alcohol or narcotic abuse;
- Pregnancy;
- Breast-feeding.
Sites / Locations
- Lithuanian University of Health Sciences, Pulmonology and Immunology Department
Arms of the Study
Arm 1
Arm 2
Experimental
Active Comparator
Allergic asthma
Healthy subjects
Bronchial asthma and sensitization to D. pteronyssinus allergen Interventions: Bronchial challenge with allergen; Eosinophil and linear bronchial smooth muscle cell co-culture formation.
Healthy subjects without allergic and other chronic respiratory diseases (control group). Interventions: Bronchial challenge with allergen; Eosinophil and linear bronchial smooth muscle cell co-culture formation.