Active clinical trials for "Asthma"

This is a single center study of 60 subjects including those with asthma and mucus plugging, those with asthma and without mucus plugging, and healthy controls. Screening data will be reviewed to determine participant eligibility. Participants who meet all inclusion criteria will participate in image-guided bronchoscopy ("virtual navigation bronchoscopy" [VNB]) to sample airway biospecimens in mucus plugged and control airways.

A retrospective database analysis to evaluate the impact of omalizumab on the use of corticosteroid, emergency-department visits and hospitalizations among patients with uncontrolled asthma and using high-dose Inhaled Corticosteroids (ICS) prior to initiating omalizumab.

We plan to use the Life Shirt to record tidal volume, respiratory rate and breathing pattern over a 6 hour period in patients admitted with difficult asthma. The Life Shirt will also be used to collect the same data over the same time period in a group of healthy controls. This data will then be correlated with the assessment of the supervising consultant as to whether the patient has any element of dysfunctional breathing contributing to their symptoms. It is hoped that the data obtained may in future be used to offer treatment to those patients with dysfunctional breathing.

Airway hyperresponsiveness is a characteristic feature of the asthma. It is known that there is an association between airway hyperresponsiveness and eosinophilic airway inflammation. However, even though inflammation can be reduced with appropriate asthma therapy, it is typical that airway hyperresponsiveness improves only modestly with treatment. The determinants of airway hyperresponsiveness are unclear. It is also not clear as to the site of airway narrowing in asthma. It is hypothesized that airways beyond the 4th order have the greatest resistance. We hope to determine the relationships between the airway inflammation, remodeling of the airway and airway hyperresponsiveness. Through local instillation of methacholine at bronchoscopy we will be able to study proximal and distal airways and the extent to which they constrict in vivo

New treatments have been developed for asthma that are good at preventing asthma attacks and improving day-to-day symptoms. Alongside the development of these new drugs, there are new ways of measuring how the lung is affected by asthma. In particular, investigators have developed ways of seeing how air moves in the lungs of people with asthma, using MRI scanning. This study aims to see how quickly these new drugs result in changes in the way the lung is working, as seen in the MRI scans and other breathing tests. This will help clinicians in the future to decide who is likely to respond to these new medicines, and once patients have started taking the drugs, will help clinicians to decide whether long term treatment is likely to benefit the people receiving them. In this study, the investigators plan to do extra breathing tests and MRI scans on people who are receiving the drug as part of their usual clinical care. The study will not change an individual's treatment, but will give the investigators more information about the patients' illnesses and the way the patients' bodies respond to treatment.

The main objectives of this study are to show that the number of type 2 innate lymphoid cells (ILC2) of the bronchial mucosa and in bronchoalveolar lavages (BAL) are higher in asthmatic children than in non-asthmatics, that the number of ILC2 of the bronchial mucosa and in BAL correlate with the number of bronchial and BAL eosinophils, and to determine whether there is a correlation between plasma and bronchial and BAL ILC2.

This study seeks to understand how biological sex influences airway hyperresponsiveness in adult asthma.

Asthma is the most common chronic disease in children, however, underdiagnosis of childhood asthma is an important issue in asthma management. The lack of reliable and objective diagnostic indicators requires the development of rapid and accurate strategies for the early diagnosis of childhood asthma. Recent studies have found a correlation between long-chain non-coding RNA (lncRNA) expression and childhood asthma, suggesting that lncRNA may be a potential biomarker for asthma diagnosis.

This is an observational, descriptive, open-label, prospective, 6-month study including a group of patients with a first prescription of IND/GLY/MF with sensor and a group with a first prescription of IND/GLY/MF without sensor.

This study aims at determining the patterns of asthma remission, the prevalence of these different patterns and the various factors associated with such remissions and possible recurrences of asthma, in order to determine the mechanisms involved in these processes. We therefore want to document these specificities in studying biopsies of subjects in complete remission of their asthma and those in only symptomatic remission of their asthma, in comparison with mildly symptomatic asthmatic subjects and healthy controls.