Clinical trial Recruiting at 3 sites Phase 4 Interventional Ages 3 and up

Ensuring access to optimal therapy for children with cystic fibrosis

Official title: Ensuring Access to Optimal Therapy in Cystic Fibrosis: The ENACT Study

Run by Arkansas Children's Hospital Research Institute · NCT07148739 · Data updated 2026-11-12

This project will test whether genetic testing and therapeutic drug monitoring can predict which children with cystic fibrosis will respond to the triple-combination elexacaftor/tezacaftor/ivacaftor therapy.

More Cystic Fibrosis (CF) trials

Quick facts

PhasePhase 4
Study typeInterventional
Ages3 Years and up
SexAll
Enrollment100 (estimated)
SponsorArkansas Children's Hospital Research Institute
Academic / other
Locations3 sites (Birmingham, Alabama and 2 other locations)
StatusRecruiting
StartedJune 10, 2025
Main results expectedDecember 2030
Study endsDecember 2030
Registry record updatedJune 2, 2026
Trial IDNCT07148739 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Children aged 2 years and older with confirmed CF and a known CFTR genotype who are clinically stable and on a stable dose of the elexacaftor/tezacaftor/ivacaftor combination are ideal candidates.

Probably not a fit

Patients who are pregnant or breastfeeding, have recent significant unintentional weight loss, recent substance abuse, recent investigational drug use, or unstable/acute lung disease are unlikely to qualify and may not receive benefit from participation.

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

What this trial studies

ENACT is a Phase 4 interventional study enrolling children age 2 and older with confirmed CF who are already on stable triple-combination CFTR modulator therapy. Participants will provide genetic samples and undergo therapeutic drug monitoring while clinical status and lung function are tracked. The study aims to identify biomarkers and genetic factors that predict individual response or risk of side effects to elexacaftor/tezacaftor/ivacaftor. The trial is run at Arkansas Children's Hospital and the University of Washington with NIH/NHLBI collaboration.

Why it matters

Potential benefit: If successful, clinicians could use genetic and drug-level information to choose CFTR modulators more precisely, reducing ineffective treatments, side effects, and costs.

How similar studies have gone: Elexacaftor/tezacaftor/ivacaftor has shown strong clinical benefit for many patients, and early pharmacogenetic and drug-monitoring work is promising, but using these tools to predict individual response to triple therapy is still relatively novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* documentation of CF diagnosis per CFF diagnostic criteria and known CFTR genotype
* age 2 years and older
* ability to provide written informed consent and/or assent (by subject and/or legal guardian)
* on a stable dose of triple combination CFTR modulator therapy for at least two weeks prior to Visit 1
* clinically stable lung disease, defined as no documented acute decrease in FEV1 \> 10%, OR use of additional antibiotics (intravenous \[IV\] or oral \[PO\]) within 4 weeks prior to screening

Exclusion Criteria:

* recent significant unintentional weight loss, as determined by the investigator, in the 4 weeks prior to screening
* pregnant or breastfeeding female
* history of alcohol or substance abuse in the 6 months prior to screening
* participation in a study involving an investigational intervention within 28 days (or 5 half-lives, whichever is longer) prior to screening
* in the opinion of the Investigator, medical or psychiatric illness, or other conditions that would interfere with participation

Where it's running

  • The University of Alabama at Birmingham
    Birmingham, Alabama, United States
    Recruiting
  • Arkansas Children's Hospital
    Little Rock, Arkansas, United States
    Recruiting
  • University of Washington
    Seattle, Washington, United States
    Recruiting

Study contacts

  • Principal investigator: Jennifer S Guimbellot, Medical Degree and License — Arkansas Children's Hospital Research Institute
  • Study coordinator: Jennifer S Guimbellot, Medical Degree and License
  • Email: jguimbellot@uams.edu
  • Phone: 501-364-5365

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.