Role of NLRP3 Inflammasone and Hypoxia in the Severity of Osteoporosis in Patients With Bronchiectasis

Study Overview
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Brief Summary
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The objectives of this research grant are to determine the association of hypoxia with the severity of osteoporosis in the patients with bronchiectasis and whether the mechanism of inflammation is triggered by inflammasones, which makes it more prone to osteoporosis in patients with bronchiectasis.

Detailed Description
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80 patients with proven bronchiectasis, diagnosed by high-resolution computed tomography (HRCT), will be recruited from our outpatient clinic of Chang Gung Memorial Hospital with written informed consent. Inclusion criteria are: daily sputum > 10 ml; absence of asthma or other unstable systemic diseases; and steady-state bronchiectasis (< 10% alteration of 24 h sputum volume, FEV1, and FVC, and in the absence of deterioration in respiratory symptoms at baseline visits). Exclusion criteria include: unreliable clinic attendance; regular user of inhaled or oral corticosteroids; history of lung resection and known asthma defined according to American Thoracic Society guidelines. The lung function and desaturation will be assessed by six-minute walking tests and the severity of disease will be evaluated by HRCT scores. Peripheral blood sample (40ml/person) is performed to analyze the bone turnover markers and the level of Hif in PBMC.

Official Title
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Role of NLRP3 Inflammasone and Hypoxia in the Severity of Osteoporosis in Patients With Bronchiectasis

Conditions
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Bronchiectasis Adult, Osteoporosis, Osteopenia

Intervention / Treatment
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* Other: Inflammasone


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: willing to sign a written consent form Male and female subjects with bronchiectasis diagnosed by high-resolution computed tomography willing to accept 6-minute exercise pulmonary function test and blood draw Men and women over the age of 20 Has undergone chest computed tomography and bone density examination in the recent five years Exclusion Criteria: pregnant women or lactating women asthma, lung resection history before the screening period active Tuberculosis infection Have received oral steroid treatment within 30 days current acute attack or clinical symptoms instability of bronchiectasis

Ages Eligible for Study
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Minimum Age: 20 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| desaturation<br>ΔSpO2 >10% or lowest SpO2<90 during baseline six minute walk test Check serum level of inflammasone, such as IL-1beta, TGF-beta TRT-PCR for PBMC | Other: Inflammasone<br>* Serum level of cytokine and RT-PCR for PBMC<br>|
| non-desaturation<br>ΔSpO2 <10% and lowest SpO2>90 during baseline six minute walk test Check serum level of inflammasone, such as IL-1beta, TGF-beta TRT-PCR for PBMC | Other: Inflammasone<br>* Serum level of cytokine and RT-PCR for PBMC<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| six minute walk test | six minute walk test distance | 6 months |