Clinical trial Recruiting at 1 site Observational Ages 18 and up

Testing for alpha-1 antitrypsin deficiency in people with airway obstruction

Official title: Evaluation of the Relationship Between Dyspnoea and Functional Airway Obstruction in Alpha-1 Antitrypsin Deficiency: A Prospective, Case-Control, Analytical Study

Run by Muğla Sıtkı Koçman University · NCT07152834 · Data updated 2026-11-12

This project will test whether people with shortness of breath and airway obstruction on spirometry have a higher rate of alpha-1 antitrypsin deficiency by measuring blood AAT levels and common gene mutations.

Quick facts

Study typeObservational
Ages18 Years and up
SexAll
Enrollment734 (estimated)
SponsorMuğla Sıtkı Koçman University
Academic / other
Locations1 site (Muğla, Menteşe)
StatusRecruiting
StartedAugust 6, 2025
Main results expectedDecember 30, 2025
Study endsJanuary 5, 2026
Registry record updatedSeptember 10, 2025
Trial IDNCT07152834 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults presenting with shortness of breath who are having spirometry that meets the study's airway obstruction criteria, can give a blood sample, and can communicate in Turkish are ideal candidates.

Probably not a fit

People with known COPD, asthma, bronchiectasis, certain systemic diseases, pregnant women, oral contraceptive users, or those unable to attend the Muğla clinic are unlikely to benefit from this screening.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This is a single-center, prospective cross-sectional screening of patients presenting to a pulmonary outpatient clinic with dyspnea who undergo routine spirometry. Consecutive eligible patients will give a small blood sample for serum AAT level measurement and genotyping for common AATD mutations, and results will be compared across the screened population. The study excludes patients with known COPD, asthma, bronchiectasis, certain inflammatory, liver, haematological or renal diseases, pregnant women, and oral contraceptive users. The goal is to find previously undiagnosed AATD cases so they can receive appropriate management and family testing.

Why it matters

Potential benefit: If successful, the screening could uncover undiagnosed AATD earlier, allowing for targeted management, family screening, and prevention efforts such as smoking cessation.

How similar studies have gone: Previous targeted screening efforts in high‑risk respiratory populations have successfully identified previously undiagnosed AATD, so this approach builds on established practice.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Achieve a post-bronchodilator FEV1/FVC ratio of 70 or above in the respiratory function test.
* Be able to speak and understand Turkish.
* Have the mental and cognitive capacity to understand the questions asked.

Exclusion Criteria:

* Renal dysfunction; acute inflammation; rheumatological, haematological, or liver diseases; COPD; asthma; bronchiectasis; and a history of malignancy.
* Pregnant women and users of oral contraceptives.

Where it's running

  • Muğla Training and Research Hospital
    Muğla, Menteşe, Turkey (Türkiye)
    Recruiting

Study contacts

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.