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Scientists hunt for lung disease genes in 3,500 volunteers

NCT ID NCT00001532

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Sep 11, 2026 · Updated 5 times

Summary

This study looks at how genes play a role in lung diseases like cystic fibrosis, asthma, and pulmonary fibrosis. Researchers will examine DNA from up to 3,500 people with and without lung disease to find genetic differences. The goal is to better understand what causes these conditions, not to test a new treatment. A small optional part of the study compares standard CT scans with low-radiation versions.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

About 3,500 people

The number the study aims to enrol. It can still change while the study runs.

Started

Sep 1996

Lead sponsor

A government research agency

The lead sponsor is the US National Institutes of Health.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

individuals with pulmonary disease (e.g., alpha 1-antitrypsin deficiency, asthma, chronic obstructive pulmonary disease, cystic fibrosis, sarcoidosis,Wegener s Granulomatosis,Mycobacterium Avium, Tuberous Sclerosis Complex, other cystic lung diseases, lymphangioleiomyomatosis and diseases associated with lymphatic disorders, or history of pneumothorax, history of infection, and genetic mutations consistent with lung pathology)

Ages

2 to 90 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

* INCLUSION CRITERIA: Inclusion criteria for patients with AAT deficiency include: (1) Diagnosis of AAT with a confirmed phenotype considered in the high risk category; (2) Clinical phenotype consistent with potential genetic diseases and other genetic causes of lung diseases (3) symptoms consistent with pulmonary disease; (4) chest x-ray consistent with pulmonary disease; (5) pulmonary function tests consistent with pulmonary disease; (6) smokers, defined as individuals who are current smokers (1 pack per day for at least 2 years) and nonsmokers, defined as never-smokers or ex-smokers who have quit smoking three or more years ago; Inclusion criteria for individuals with chronic obstructive pulmonary diseases include: 1. symptoms consistent with pulmonary disease 2. chest x-ray consistent with pulmonary disease 3. pulmonary function tests consistent with pulmonary disease; 4. smokers, defined as individuals who are current smokers (1 pack per day for at least 2 years) and nonsmokers, defined as never-smokers or ex-smokers who have not smoked for three or more years. Inclusion criteria for patients with cystic fibrosis include a defined genetic mutation (i.e., any of the known variants of the CFTR gene, such as delta F508 allele) or a cystic fibrosis phenotype and clinical features consistent with this disease. Children with cystic fibrosis over eight years of age may be included. Patients with established diagnoses of sarcoidosis; mycobacterial infections; TSC (definite or possible); cystic lung diseases including genetic diseases; lymphangioleiomyomatosis or diseases associated with lymphatic disorders; history of pneumothorax; pulmonary fibrosis; asthma; histiocytosis X and diabetes mellitus will be included in this protocol. Relatives of patients may also be seen under this protocol. Children with lymphangiomatosis who are two years of age or older may be included. Participants with asthma may be enrolled at Suburban Hospital. Research volunteers in the pulmonary control group are defined as individuals with no pulmonary disease (e.g. rheumatoid arthritis without evidence of pulmonary disease). Research volunteers in the diabetes control group are defined as individuals with no history of diabetes, coronary artery disease, or pulmonary disease. Pregnant and or nursing women can be included in accordance with Federal Regulations at Subpart B of 45 CFR 46. Subjects who are pregnant and or nursing will be excluded from procedures during their pregnancy that are greater than minimal risk, until they are no longer pregnant and/or nursing. Procedures that will not be completed while the subject is pregnant and/or nursing including: PFTs, Six Minute Walk Test, thoracentesis, bronchoscopy, and measurements with imaging modalities requiring contrast or with radiation exposure such as Chest x-ray, CT scan, MRI. Allowing subjects to be included in the study may glean important information about individuals with uncommon pulmonary disease during and post pregnancy. Patients with abnormalities in ADP-ribosyltransferases, ADP-ribosyl-acceptor hydrolases, and their substrates. Children who are two years of age or older may be studied if they have a known defect in ADP-ribosylation, or if they have a family member with a defect in ADP-ribosylation and may be affected. EXCLUSION CRITERIA: Exclusion criteria for all participants include: 1. age less than 18 or greater than 90 except for NIH patients with diseases /disorders as described in this protocol (except cystic fibrosis, lymphangiomatosis or defects in ADP-ribosylation) who are 16 years of age or older, patients with cystic fibrosis who are over eight years of age, patients who are two years of age or older with lymphangiomatosis or a known defect in ADP-ribosylation, or who have a family member with a defect in ADP-ribosylation, or unless patient-specific IRB approval is obtained and; 2. inability to obtain reliable pulmonary function testing. As clarification, healthy volunteers, relatives of patients (except as noted for an ADP-ribosylation defect), and asthmatic patients from Suburban Hospital will be excluded if less than 18 or greater than 90 years of age. Exclusion criteria for participating in the bronchoscopy portion of the study are: 1. presence of any contraindication for fiberoptic bronchoscopy, with lavage and/or bronchial brushing; 2. advanced stage of a pulmonary or a systemic illness such that the risk is judged to be significant even in the absence of a specific contraindication to the procedure 3. allergy to topical anesthetic (e.g., lidocaine) 4. current or recent respiratory infection (within the last 4 weeks) 5. pregnancy or lactation 6. age less than 18 or greater than 65.

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Conditions

The condition(s) this trial relates to.

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • National Institutes of Health Clinical Center

    RECRUITING

    Bethesda, Maryland, 20892, United States

  • Suburban Hospital

    COMPLETED

    Bethesda, Maryland, 20814, United States

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