Actively Recruiting

Age: 2Years - 90Years
All Genders
Healthy Volunteers
ID00001532

Role of Genetic Factors in the Pathogenesis of Lung Disease

Led by National Heart, Lung, and Blood Institute (NHLBI) · Updated on 2026-06-08

3500

Participants Needed

2

Research Sites

N/A

Total Duration

On this page

Sponsors

N

National Heart, Lung, and Blood Institute (NHLBI)

Lead Sponsor

S

Suburban Hospital

Collaborating Sponsor

AI-Summary

What this Trial Is About

Researchers are studying how genetic factors contribute to lung diseases by analyzing genes involved in breathing and lung cell function. This observational study focuses on identifying abnormal gene variants linked to various lung conditions such as alpha 1-antitrypsin deficiency, asthma, chronic obstructive pulmonary disease, cystic fibrosis, sarcoidosis, infections, and other genetic mutations. The study compares these genetic traits between affected patients and healthy volunteers. Participants include individuals with lung diseases, possible lung diseases, and healthy controls. An optional CT sub-study involves up to 150 subjects, including adults with lung disease and children aged 9 and older with cystic fibrosis. This sub-study compares standard CT scans to low dose radiation CT scans to evaluate if the lower dose method can effectively monitor lung abnormalities. Children must have had a prior standard CT scan for medical reasons to join this optional part. During the study, participants undergo genetic testing, pulmonary function tests, chest X-rays, and clinical evaluations. Some may participate in the CT scan sub-study with additional imaging. Researchers monitor genetic variants and lung disease markers over a year to understand hereditary factors. Pregnant or nursing women may participate but will avoid higher-risk procedures during pregnancy. Participation duration and assessments vary by individual health status and study group.

CONDITIONS

Brief Title

Role of Genetic Factors in the Development of Lung Disease

Who Can Participate

Age: 2Years - 90Years
All Genders
Healthy Volunteers

Eligibility Criteria

Eligible

You may qualify if you...

  • Diagnosed with alpha 1-antitrypsin deficiency with high-risk phenotype
  • Clinical and symptomatic evidence of pulmonary disease
  • Chest X-ray and pulmonary function tests consistent with lung disease
  • Current smokers (1 pack/day for 2+ years) or nonsmokers (never or quit 3+ years ago)
  • Diagnosis of chronic obstructive pulmonary disease with lung disease symptoms and tests
  • Defined cystic fibrosis genetic mutation or phenotype; children over 8 years with cystic fibrosis eligible
  • Diagnosed with sarcoidosis, mycobacterial infections, tuberous sclerosis complex, cystic lung diseases, lymphangioleiomyomatosis, pneumothorax history, pulmonary fibrosis, asthma, histiocytosis X, or diabetes mellitus
  • Relatives of patients may participate
  • Children 2 years or older with lymphangiomatosis
  • Asthmatic patients from Suburban Hospital
  • Research volunteers without pulmonary or diabetes disease
  • Pregnant or nursing women may participate but avoid higher-risk procedures during pregnancy
  • Children 2 years or older with known or familial defects in ADP-ribosylation
Not Eligible

You will not qualify if you...

  • Age less than 18 or greater than 90 except specific conditions allowing younger ages (e.g., cystic fibrosis, lymphangiomatosis, ADP-ribosylation defects)
  • Inability to perform reliable pulmonary function tests
  • Healthy volunteers, patient relatives (except ADP-ribosylation defect), and asthmatic patients under 18 or over 90 excluded
  • Contraindications to fiberoptic bronchoscopy for bronchoscopy sub-study
  • Advanced pulmonary or systemic illness making procedure risk significant
  • Allergy to topical anesthetics like lidocaine
  • Recent respiratory infection within last 4 weeks
  • Pregnancy or lactation during bronchoscopy sub-study
  • Age less than 18 or over 65 for bronchoscopy sub-study

AI-Screening

AI-Powered Screening

Complete this quick 3-step screening to check your eligibility

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Your Study Journey

Screening

Duration - 2 to 4 weeks

Participants are screened for eligibility to participate in the trial.

Diagnostic Evaluation

Duration - Varies per participant

Participants undergo genetic testing and assessments related to lung disease including polymorphic gene surveys and gene expression analysis.

1 to 2 visits depending on assessments

Long-term Monitoring

Duration - Up to 1 year

Participants are observed over time to evaluate the role of hereditary factors in lung disease development.

Periodic visits during the 1-year observation period

Trial Site Locations

Total: 2 locations

1

Suburban Hospital

Bethesda, Maryland, United States, 20814

Completed

2

National Institutes of Health Clinical Center

Bethesda, Maryland, United States, 20892

Actively Recruiting

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Research Team

T

Tatyana A Worthy, R.N.

J

Joel Moss, M.D.

How is the study designed?

Study Type

OBSERVATIONAL

Masking

N/A

Allocation

N/A

Model

N/A

Primary Purpose

N/A

Number of Arms

2

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Published Research Related To This Trial

Clinical features and history of the destructive lung disease associated with alpha-1-antitrypsin deficiency of adults with pulmonary symptoms.

M L Brantly, L D Paul, B H Miller...

https://pubmed.ncbi.nlm.nih.gov/3264124

Chest CT Scan at Radiation Dose of a Posteroanterior and Lateral Chest Radiograph Series: A Proof of Principle in Lymphangioleiomyomatosis.

Eileen Hu-Wang, John L Schuzer, Shirley Rollison...

https://pubmed.ncbi.nlm.nih.gov/30291925