Scientists track how CF drugs change Body's salt and lung function
NCT ID NCT04732910
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study watches 500 people with cystic fibrosis who are already taking CFTR modulator medicines. Researchers measure sweat chloride, nasal electrical activity, and rectal tissue responses to see how well the drugs improve CFTR protein function. The goal is to better understand treatment effects, not to test a new drug.
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
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About 500 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jul 2018
- Expected to finish
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Dec 2027
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
Who is studied
Cystic Fibrosis patients
- Ages
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6 months and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide 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: * Decision for cystic fibrosis (CF) transmembrane regulator (CFTR)-modulator therapy by the patient and the caring CF physician * Signed informed consent form (ICF) and, where appropriate, signed assent form. Exclusion Criteria: * Ongoing participation in an investigational drug study (including studies investigating lumacaftor, tezacaftor or ivacaftor)
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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.
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The places running it
4 sites. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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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
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Charité - Universitätsmedizin Berlin
RECRUITINGBerlin, State of Berlin, 13353, Germany
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Hannover Medical School
RECRUITINGHanover, Germany
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Justus-Liebig-University Giessen
RECRUITINGGiessen, Germany
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University of Heidelberg
RECRUITINGHeidelberg, Germany
More trials for these conditions
Other studies related to the condition(s) this trial covers.
- Can Device-Preserved donor lungs boost transplant success?
- Can a simple questionnaire reveal why some cystic fibrosis patients skip physiotherapy?
- Cystic fibrosis diabetes: do gut hormones and genes hold the key?
- Can a special lung scan catch cystic fibrosis damage earlier than standard tests?
- Can a pill replace the liquid? testing a new form of cystic fibrosis drug
- Triple therapy under the microscope: does it transform cystic fibrosis care?