Gene Expression Profile and Inflammation Profile of Classic Asthma, Cough Variant Asthma and Eosinophilic Bronchitis

Inclusion Criteria: The patients with classic asthma inclusion criteria Asthmatic patient inclusion criteria 1. Male or female patients aged ≥ 18 and ≤ 65, who have signed an Informed Consent form prior to initiation of any study-related procedure. 2. The patients with classic asthma had a history of episode dyspnea and wheezing with or without cough. 3. Clinical diagnosis of asthma confirmed by a chest physician according to international guidelines (GINA 2014); methacholine airway hyperresponsiveness (provocative concentration of methacholine causing a 20% fall in FEV1(forced expiratory volume at one second )【PD20】),\>12% improvement in FEV1 10 min after inhaling 200ug of salbutamol. 4. None of the patients with classic asthma had used inhaled or oral corticosteroids, long-acting β2-agonists, leukotriene antagonists, sodium cromoglycate,or nedocromil sodium, anticholinergic agents, during four weeks prior to entry into the study. The patients with CVA inclusion criteria 1. Male or female patients aged ≥ 18 and ≤ 65, who have signed an Informed Consent form prior to initiation of any study-related procedure. 2. The diagnosis of CVA is based on isolated cough lasting for ≥ 8 weeks without wheezing or dyspnea, airway hyperresponsiveness (AHR), and relief of cough with bronchodilators according to recommendations in the Chinese national guidelines on the diagnosis and management of cough. 3. None of the patients with CVA had used inhaled or oral corticosteroids, long-acting β2-agonists, leukotriene antagonists, sodium cromoglycate,or nedocromil sodium, anticholinergic agents, during four weeks prior to entry into the study. The patients with EB inclusion criteria 1. Male or female patients aged ≥ 18 and ≤ 65, who have signed an Informed Consent form prior to initiation of any study-related procedure. 2. The diagnosis of EB is based on cough lasting for ≥ 8 weeks according to recommendations in the Chinese national guidelines on the diagnosis and management of cough. 3. None of the patients with EB had used inhaled or oral corticosteroids, long-acting β2-agonists, leukotriene antagonists, sodium cromoglycate,or nedocromil sodium, anticholinergic agents, during four weeks prior to entry into the study. Healthy subjects inclusion criteria 1. Male or female patients aged ≥ 18 and ≤ 65, who have signed an Informed Consent form prior to initiation of any study-related procedure. 2. Normal spirometry: baseline FEV1 ≥ 80% of the predicted normal value, FEV1/FVC(forced vital capacity) \> LLN (lower limit of normal). 3. Normal airways responsiveness. 4. Healthy subjects have no any disease or negative allergen skin prick test results. Exclusion Criteria: Patients with classic asthma, CVA and EB exclusion criteria The presence of any of the following will exclude a subject from study enrolment: Current smokers, ex-smokers. Individuals with respiratory infection during the previous one month. Clinical history of chronic obstructive pulmonary disease(COPD), bronchiectasis, pulmonary embolism. Clinical history of haematological, immunologic, renal, neurologic, hepatic, endocrinal or other disease, or any condition that might compromise the results or interpretation of the study. Asthma exacerbation and unstable asthma . Pregnant or lactating women.