Clinical trial Recruiting at 1 site Interventional Ages 18 and up

Monitoring kidney function in cystic fibrosis patients during a treatment pause

Official title: Cystic Fibrosis in the Kidney: Monitoring the Effectiveness of Elexacaftor/tezacaftor/ivacaftor in Urine After a Short Pause of Therapy

Run by University of Aarhus · NCT05818319 · Data updated 2026-11-12

This study is testing how a short break from a specific cystic fibrosis treatment affects kidney function in adults with the condition.

Quick facts

Study typeInterventional
Ages18 Years and up
SexAll
Enrollment30 (estimated)
SponsorUniversity of Aarhus
Academic / other
Locations1 site (Aarhus C, Central Jutland)
StatusRecruiting
StartedJune 1, 2023
Main results expectedDecember 2025
Study endsDecember 2025
Registry record updatedFebruary 19, 2025
Trial IDNCT05818319 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults over 17 years with cystic fibrosis and normal kidney function.

Probably not a fit

Patients with critical acute illness or severe lung disease may not benefit from this study.

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

What this trial studies

This study evaluates the impact of a short pause in treatment with the CFTR modulator combination therapy Elexacaftor/tezacaftor/ivacaftor on urine bicarbonate excretion in adult cystic fibrosis patients. The researchers aim to determine if changes in urine HCO3- excretion can serve as a biomarker for CFTR function and the effectiveness of the therapy. Participants will undergo a treatment pause of varying durations to assess these changes. The study focuses on understanding the relationship between CFTR dysfunction and kidney function in cystic fibrosis.

Why it matters

Potential benefit: If successful, this study could provide insights into kidney function in cystic fibrosis patients and improve treatment strategies.

How similar studies have gone: While the specific approach of monitoring urine HCO3- excretion in this context may be novel, related studies on CFTR modulation have shown promising results.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Adult (age \>17 years) CF patients.
* Normal kidney function estimated by eGFR\>90.
* Adults capable of understanding and voluntarily consenting.

Exclusion Criteria:

* Critical acute illness.
* Severe lung disease (ppFEV1\<40%).
* Adults not capable of understanding and voluntarily consenting.

Where it's running

  • Department of Infectious Diseases, Aarhus University Hospital
    Aarhus C, Central Jutland, Denmark
    Recruiting

Study contacts

  • Principal investigator: Jens G. Leipziger — Department of Biomedicine, Aarhus University, Denmark
  • Study coordinator: Amalie Q. Rousing, BM
  • Email: arousing@biomed.au.dk

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

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.