The Role of Airway Microbiota on Clinical Phenotypes and Disease Severity in Bronchiectasis

Bronchiectasis Adult Clinical Trial

Official title:

The Role of Airway Microbiota on Clinical Phenotypes and Disease Severity in Bronchiectasis

Clinical Trial Details — Status: Not yet recruiting

Administrative data

• NCT number: NCT05068518
• Other study ID #: MOST 110-2635-B-182A-006
• Status: Not yet recruiting
• Start date: October 1, 2021
• Est. completion date: December 31, 2023

Study information

• Verified date: September 2021
• Source: Chang Gung Memorial Hospital
• Contact: Chun Yu Lin, MD
• Phone: 886-3-3281200
• Email: pitiful1984[@]gmail.com
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

Bronchiectasis is characterized pathologically by permanent bronchial dilatation and airway inflammation. The pathogenesis of the disease and the inflammatory, infective and molecular drivers of disease progression are not fully understood. The concept of "treatable traits" was proposed as biomarker-directed approach, based on the recognition of clinical phenotype and endotypes, help to personalized treatment options. Airway microbiota, including bacteria, NTM and fungus, have important but different inflammatory process in bronchiectasis. Our study will provide a new concept that airway microbiota might involve in the airway and systemic inflammation, mucus hypersecretion, as well as the airway damage, remodeling, and frequent exacerbations in bronchiectasis, thus leading to the deterioration of disease severity.

Bronchiectasis remains a major cause of respiratory morbidity and treatment is generally only partly successful. Our study will give more clues about the mechanisms on the inflammatory pathway and the probably different response among patients with different isolated microbiota from airways.

Description:

Bronchiectasis is characterized pathologically by permanent bronchial dilatation and airway inflammation, and clinically by productive cough, hemoptysis and periodic infectious exacerbations. The pathogenesis of the disease and the inflammatory, infective and molecular drivers of disease progression are not fully understood. Current available therapeutic options have shown only a modest impact on disease outcomes in randomized clinical trials. The concept of "treatable traits" was proposed as biomarker-directed approach, based on the recognition of clinical phenotype and endotypes, help to personalized treatment options. Potential treatable traits of airways disease into four broad categories: pulmonary, extra-pulmonary, etiological, and behavior and lifestyle treatable traits. Airway microbiota, including bacteria, NTM and fungus, have important but different inflammatory process in bronchiectasis. Our study will provide a new concept that airway microbiota might involve in the airway and systemic inflammation, mucus hypersecretion, as well as the airway damage, remodeling, and frequent exacerbations in bronchiectasis, thus leading to the deterioration of disease severity.

Bronchiectasis remains a major cause of respiratory morbidity and treatment is generally only partly successful. Our study will give more clues about the mechanisms by which the immunomodulatory medications (macrolides) on the inflammatory pathway and the probably different response among patients with different isolated microbiota from airways. Thus, our results will not only shed light on the airway microbiota inflammatory mechanisms responsible for disease severity, but also provide a new therapeutic direction.

Recruitment information / eligibility

• Status: Not yet recruiting
• Enrollment: 270
• Est. completion date: December 31, 2023
• Est. primary completion date: December 31, 2023
• Accepts healthy volunteers: No
• Gender: All
• Age group: 20 Years to 100 Years

Eligibility

Inclusion Criteria:

• The inclusion criteria were as follows: bronchiectasis documented on chest HRCT, idiopathic etiology of bronchiectasis, chronic sputum production (daily sputum = 10 ml), absence of other major pulmonary diagnoses, and steady state defined by the absence of change of symptoms noted by the patient over the past 3 weeks

Exclusion Criteria:

• The exclusion criteria were as follows: bronchiectasis with defined etiology (i.e, post-tuberculosis, primary ciliary dyskinesia, allergic bronchopulmonary aspergillosis), common variable immunodeficiency, and use of antibiotics within the last 3 weeks. Patients with hepatic failure, malignancy, or pregnancy were also excluded.

Related Conditions & MeSH terms

• Bronchiectasis
• Bronchiectasis Adult

Intervention

Other:
• No intervention
no intervention

Locations

Country	Name	City	State
Taiwan	Department of Thoracic Medicine, Chang Gung Memorial Hospital	Taoyuan

Sponsors (1)

Lead Sponsor	Collaborator
Chang Gung Memorial Hospital

Country where clinical trial is conducted

Taiwan, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Acute exacerbation	visit ER or hsopitalization	one year