Effect of Losartan in Cystic Fibrosis (CF)-NIH Grant #133240

  • End date
    Dec 31, 2022
  • participants needed
  • sponsor
    University of Kansas Medical Center
Updated on 22 March 2022
pulse oximetry


The goal of this study is to execute a small clinical proof of concept trial: To examine the effects of losartan on mucociliary clearance (MCC) in patients not eligible for CFTR rescue therapies


CF is the most common inherited disease causing a shortened life span, affecting ~30,000 people in the United States with annual health care costs of at least $1.8 billion. The median age of predicted survival of these patients has improved and is now almost 40 years in the US. Over the last two decades, investigators have identified ~2,000 mutations in the CF transmembrane conductance regulator (CFTR) gene. These mutations are imperfectly classified into 5 groups, and small molecules are being developed that rescue group-specific CFTR mutants. These agents have produced remarkable improvements in some patients. The CFTR potentiator ivacaftor (Kalydeco™), approved by the FDA mainly for class III mutations especially G551D, improves ion transport (large decrease in sweat chloride), clinical outcome (increased FEV1 and weight, decreased exacerbations), and quality of life. Furthermore, the FDA recently approved Orkambi™ (a corrector and potentiator: lumacaftor plus ivacaftor) because it reduced exacerbation rates by up to 39% in patients homozygous for F508del.

It has been demonstrated in vitro that improvements in airway surface liquid (ASL) volume are highly predictive of changes seen in clinical studies and track with tracheal mucus velocities measured in sheep in vivo using the CFTR potentiator ivacaftor, inhaled hypertonic saline and other interventions (preliminary data). ASL volume is regulated by ion fluxes through ENaC, CFTR, CaCC, and BK channels, and TGF-β1-mediated inflammation in CF cells decreases activities of CaCC (8) and BK. These findings suggest that effective and safe anti-inflammatory therapy has the potential to improve mucociliary dysfunction in CF patients, even in the absence of small molecule therapy. Currently used anti-inflammatory therapies such as high-dose ibuprofen and steroids produce unwanted side effects that negate their effectiveness. Other medications showed severe side effects in clinical trials. However, experiments proposed in this application will test the hypothesis that losartan provides a safe and effective anti-inflammatory therapy needed to improve outcomes in CF patients.

Briefly, 16 patients with CF, >18 years of age, who are not on CFTR augmentation therapy will be recruited for this trial (4 per year). After signing informed consent at the screening visit, spirometry will be performed, take blood for safety and inflammatory markers, and test for pregnancy where applicable. Since losartan has teratogenic effects, strict birth control in female participants will be enforced. Eligible patients will complete visits as following:

Quality of life will be assessed by CF quality of life questionnaire - revised (CFQ-R). Cytokines will be measured from nasal fluid collected by Leukosorb filter paper. After assessing baselines, a daily dose of 50 mg losartan will be started, followed by a safety visit 7 days after treatment start (± 2 days). Then, the losartan dose will be increased to 100 mg daily until week 14. Since this trial assesses anti-inflammatory effects of 100 mg losartan, the total duration will be 14 weeks to achieve >12 weeks of treatment with losartan.

Condition Cystic Fibrosis
Treatment losartan
Clinical Study IdentifierNCT03435939
SponsorUniversity of Kansas Medical Center
Last Modified on22 March 2022


Yes No Not Sure

Inclusion Criteria

CF patients with any known mutation combination not on CFTR augmentation therapy
≥18 years of age
Severity of the Disease: Suitable patients will have mild to moderate lung disease, as defined by
Pulmonary Function: Each patient must have an FEV1 ≥40% of predicted at the screening visit
Hemoglobin saturation: Patients must have an oxygen saturation of >92% on room air as determined by pulse oximetry at the screening visit
Produces sputum regularly (daily basis, at minimum)
FEV1 ≥ 40% of predicted at screening visit
Able to sign Informed consent
Negative COVID-19 test within 72 hours prior to MCC testing

Exclusion Criteria

When enrolling female patients
Not willing to adhere to strict birth control (combination of two methods)
If female, patient must be non-pregnant and non-lactating, and those of childbearing potential must be using an acceptable method of birth control (i.e., an Intrauterine Contraceptive Device with a failure rate of <1%, hormonal contraceptives or a barrier method). If a female patient is abstinent, she must agree to use one of the acceptable methods if she becomes sexually active
Unstable lung disease: As defined by a change in medical regimen during the preceding 2 weeks or an FEV1 ≥15% below value within 3 months
Received an investigational drug or therapy during the preceding 30 days
Active or former smokers with less than 1 year since quitting, or >10 pack-year smoking history
Unable to adequately complete study measures, including spirometry
Intolerance to angiotensin receptor blockers (ARB)
Treatment with angiotensin converting enzyme (ACE) inhibitor
Regular use of NSAIDs or potassium supplementation, treatment with aliskiren, on anticoagulation
Oral corticosteroid use within 6 weeks
Exacerbation requiring treatment within 6 weeks
Treatment of mycobacterial infections
Significant hypoxemia (oxygen saturation <92% on room air and rest or use of continuous oxygen treatment), chronic respiratory failure by history (pCO2 > 45 mmHg), clinical evidence of cor pulmonale
Untreated arterial hypertension (systolic blood pressure >140 mm Hg, diastolic blood pressure > 90 mmHg)
Blood pressure less than 90 mm Hg systolic while standing
Cardiac, renal (creatinine 1.5 times normal limit), hepatic (LFTs > 3x normal upper limit), neurological, psychiatric, endocrine or neoplastic diseases that are judged to interfere with participation in study
Known renal artery stenosis
Concomitant airway disorders other than CF, such as ABPA
Subjects with prior thoracic surgery
Other severe acute or chronic medical or psychiatric condition or laboratory abnormality that may increase the risk associated with trial participation or may interfere with the interpretation of trial results and, in the judgment of the PI, would make the subject inappropriate for enrollment
Patients using intermittent inhaled or oral antibiotics will be allowed to participate in this trial. Patients on chronic, cycling antibiotics will be required to have completed at least 2 full cycles of the prescribed antibiotic prior to enrollment and should be studied during the same phase of treatment (on or off) during each study period
Have had radiation exposure within the past year that would cause them to exceed Federal Regulations by participating in this study
Clear my responses

How to participate?

Step 1 Connect with a study center
What happens next?
  • You can expect the study team to contact you via email or phone in the next few days.
  • Sign up as volunteer to help accelerate the development of new treatments and to get notified about similar trials.

You are contacting

Investigator Avatar

Primary Contact



Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

Learn more

If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

Learn more

Complete your scheduled study participation activities and then you are done. You may receive summary of study results if provided by the sponsor.

Learn more

Similar trials to consider


Browse trials for

Not finding what you're looking for?

Every year hundreds of thousands of volunteers step forward to participate in research. Sign up as a volunteer and receive email notifications when clinical trials are posted in the medical category of interest to you.

Sign up as volunteer

user name

Added by • 



Reply by • Private

Lorem ipsum dolor sit amet consectetur, adipisicing elit. Ipsa vel nobis alias. Quae eveniet velit voluptate quo doloribus maxime et dicta in sequi, corporis quod. Ea, dolor eius? Dolore, vel!

  The passcode will expire in None.

No annotations made yet

Add a private note
  • abc Select a piece of text from the left.
  • Add notes visible only to you.
  • Send it to people through a passcode protected link.
Add a private note