Active clinical trials for "Asthma"

Program： Clinical Study of Relationship Between Granulocyte Activation, HDAC2 and Severe Asthma Aim：The early prediction of severe asthma, early intervention on the disease, reduce the family and the national finance. design:This study is a single center randomized controlled trial designed by the Department of respiratory medicine, Xijing Hospital, as the main research unit.Compare the case group(severe asthma group and mild-and-moderate asthma group) and control group(healthy control group) by detecting the activity of MPO、NE、MMP-9 and ECP in the peripheral blood and the activity of HDAC2 in PBMCs of patients. case:60 Case selection: Inclusion criteria: age 18-75 years old; diagnosis of asthma was clear; informed consent was signed. Exclusion criteria: poor compliance; cognitive ability is low; psychiatric disorders need to be combined with psychotropic medication.

Current diagnostic tools used in pulmonary disease often do not meet the challenges set by the respective pathophysiology. The investigators therefore aimed to evaluate novel or not widely used diagnostic approaches for the detection and therapeutic monitoring of patients with various pulmonary diseases.

Exhibiting variable airway obstruction is a key factor in the diagnosis of asthma but too often it is undetected by spirometry. Study hypothesis: The forced oscillation technique (FOT) will show airway obstruction in asthmatic children with normal spirometry pointing out its advantage in measuring AW obstruction in this population. We will conduct a prospective observational study in 6-18 years old children with the diagnosis of asthma and a normal spirometry results. Each subject will undergo evaluation including: asthma control questionnaire, spirometry, FOT and Fractional exhaled nitric oxide (FeNO) to assess the sensitivity of FOT in diagnosing airway obstruction in this circumstances.

Allergic asthma is a complex and heterogeneous disease caused by excessive responses to inhaled allergens. Current medication, including corticosteroids and bronchodilators, does not act on the origin of inflammation but rather combats symptoms, leaving many patients uncontrolled. Airway epithelium is critical for the initiation and progression of asthma pathology. We will include a 52 subjects divided over two groups: ongoing asthma (26 patients) and non-asthmatic healthy controls (26 subjects) in a cross-sectional study. All subjects will be extensively clinically characterized including respiratory symptoms/questionnaires, in- and expiratory CT-scans, and parameters of large and small airway function and inflammation. In addition, blood and nasal epithelial brushes will be obtained to study the genetic and epigenetic mechanisms of asthma. Finally, bronchoscopy with bronchial biopsies and brushes will be performed under conscious sedation. Bronchial biopsies from both patient groups will be used for single cell transcriptional analysis.

This study evaluates the value of impedance pneumography, used as overnight home recordings during a longitudinal design, in assessing asthma control in preschool children

The general objective of this multicenter, international study is to perform a multivariate descriptive analysis of a large population of well-defined subjects with sensitizer-induced OA ascertained by a positive SIC result in order to provide more information on the characteristics of this condition.

This study is a multicenter and prospective cohort study of children diagnosed with asthma. Clinical symptoms and signs, quality of life, blood test, and lung function were detected every three months. FeNO detection, chest imaging, and induced sputum smear were detected when necessary. Biological samples will be collected when recruiting and finishing follow-up.

Asthma is a highly prevalent chronic airway inflammatory disease characterized by airway hyper-responsiveness, reversible airflow obstruction and increased mucus secretion, involving large and small airways. An emerging sub-phenotype of severe asthma is the late onset disease associated with nasal polyposis, a frequent co-morbidity that significantly impacts lung function and symptom control. On the basis of the infiltrate found in the sputum, asthma can be divided into four distinct phenotypes: eosinophilic, neutrophilic, mixed granulocytic and pauci-granulocytic. The majority of patients with eosinophilic asthma are sensitive to corticosteroids, and biological therapies targeting eosinophils (anti-Interleukin (IL)-5 and anti-IL5R) have been recently approved. However, it is known that some asthmatics, particularly those who have severe disease and are resistant to corticosteroids, have elevated neutrophil counts in the airway where they play a vital role in the exacerbation of the disease. However, the precise role of neutrophils in severe asthma and the mechanisms involved in neutrophil-induced tissue damage have not been clarified yet. The hypothesis of the study is that neutrophils and eosinophils can contribute to the severity of asthma by changing their phenotypes according to the airway environment. Thus, a better understanding of the roles of neutrophils and eosinophils in severe asthma may lead to the identification of novel biomarkers and the development of new therapeutic approaches in different phenotypes of severe asthma.

The aim of this study is to evaluate the diagnostic value of sputum cell counts in differentiation between asthma, COPD and ACO. to examine the relationship between sputum cell counts in bronchial revers¬ibility and bronchial hyperresponsiveness

A prospective multi-centre, non-interventional observational study, that will be conducted in several centers in Greece for a 2-year time period (completion date December 2020), to describe patient characteristics, medical history, and the clinical benefit of mepolizumab in patients with severe eosinophilic asthma newly initiated to the drug.