NCT05259904RecruitingPhase 2
Study to Improve Deployment Related Asthma by Using L-Citrulline Supplementation
Study to Improve dEployment Related Asthma by Using L-citrulline Supplementation (SEALS)
Source: ClinicalTrials.gov · Last updated 6 Apr 2023 · Not updated for over 12 months - ask the site whether it is still open
Brief summary (registry, in English)
Service men and women returning from deployment are significantly more likely to develop asthma and severe respiratory symptoms from airway obstruction. Why this happens is not well known, but exposure to diesel, burn pits, biomass smoke, and sandstorms are thought to play a role. Ultimately, patients with deployment related asthma develop a complex airway disease that does not respond well to standard asthma medications. Therefore, it is imperative that safe and affordable treatments that could improve quality of life and symptoms are studied. It has been previously shown that adult patients with poorly controlled asthma have an abnormal regulation of an amino acid called L-arginine and airway nitric oxide (FeNO), a gaseous molecule normally produced in the airways of healthy people. In healthy people, nitric oxide is present in amounts that help keep the airways open. However, in some patients with asthma, nitric oxide and L-arginine are often low. The investigators' preliminary data in obese asthmatics show that L-citrulline, which is an amino acid that can be metabolized into L-arginine, improved lung function and asthma control, while increasing the levels of FeNO. This is potentially shifting the paradigm in how investigators think of asthma management, as rising FeNO is often thought of being a bad sign. Based on this, the study investigators hypothesize that an L-citrulline-based drug strategy will normalize nitric oxide metabolism, suppress oxidative inflammatory responses and improve airway function in obese patients with asthma. The study proposal presents a clinical trial approach to treat deployment related asthma patients using L-citrulline as an add-on therapy to improve asthma control. If this confirms the investigators' previous study results, the investigators will be in route for developing the only precision-based therapy available to treat this asthma phenotype. These study results will potentially show that L-citrulline is a safe, tolerable medication that can make a significant impact on the respiratory health of a large segment of our active and veteran population at a reasonable cost.
- Status (registry)
- Recruiting
- Phase (registry)
- Phase 2
- Study type
- Interventional
- Enrollment
- 75 (estimated)
- First submitted
- 18 Feb 2022
- Start date
- 8 Mar 2023
- Primary completion date
- Oct 2028
- Lead sponsor
- University of Colorado, Denver
- Diseases
- Asthma
- NCT number
- NCT05259904
What you commit to
- Study type: Interventional · Phase 2
- Planned participants: 75
- From 8 Mar 2023 to the primary completion date, Oct 2028
- 1 site in 1 country
- Visits and tests: ask the trial team, the registry does not list them
Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.
Who cannot take part
Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.
Prior treatment
- Respiratory tract infection within the 4 weeks prior to Visit 0
- Pulmonary-related ER visit within the 4 weeks prior to Visit 0
- Oral or systemic corticosteroid burst (for any indication) within the 4 weeks prior to Visit 0. One-time doses, such as intra-articular injections into a shoulder or knee joint, require a 2-week washout prior to Visit 0
- Significant concomitant medical illness at the discretion of the PI, including (but not limited to) heart disease, cancer, uncontrolled diabetes, other chronic lung diseases
- Concomitant use of PDE5 drugs or oral mononitrates
Other illness
- Intolerance or allergy to L-arginine or L-citrulline
Lab values
- Chronic renal failure (creatinine \> 2.0) at Visit 0 (Associated with higher ADMA levels)
- Positive urine (or serum) pregnancy test at Visit 0 or at any time during the study
Other
- Unable or unlikely to complete study assessments in the opinion of the Investigator
- Study intervention poses undue risk to patient in the opinion of the Investigator
Who the study is looking for
- Adequate completion of informed consent process with written documentation
- Male and female patients, 18 - 70 years old, inclusive
- Meets criteria for deployment related asthma or DRA (New onset of persistent respiratory symptoms of cough, dyspnea, wheezing and/or chest tightness during or after post-9/11/2001 military deployment to Southwest Asia, accompanied by a post-bronchodilator increase in FEV1 ≥ 12% and an increase in FEV1 ≥ 200 milliliters on pulmonary function testing and/or methacholine challenge showing airways hyperresponsiveness with a 20 percent drop in FEV1 (PC\[-20\] FEV1) ≤ 16 mg/mL. ) Historical results from previous studies or documented in clinical records within the last 24 months are acceptable alternatives
- Able to perform reproducible spirometry according to ATS criteria
- All racial/ethnic backgrounds may participate
- Smoking tobacco history ≤15 pack years and no smoking in the last 3 months
- Suboptimal asthma control at baseline (ACQ ≥ 0.5 or ACT\<19)
Age in the registry: 18 years to 70 years · Sex: All · Does not accept healthy volunteers
Sites (1)
Sites in registry order. Pick your city on the disease page to sort them by distance.
| Site | City | Country | Site status |
|---|---|---|---|
| National Jewish Health Coordinator of this site? Confirm its status | Denver | United States | Recruiting |
This page is information, not medical advice. Discuss any trial with your doctor.