NCT05498116 · University of Colorado, Denver
Effect of Montelukast on Kidney and Vascular Function in Type 1 Diabetes
What this study is about
Kidney disease is a common problem among people with type 1 diabetes and can lead to disability, dialysis, and early death. Inflammation plays a key role in the development of kidney disease in type 1 diabetes and targeting leukotrienes, inflammatory chemicals the body releases in response to allergic reactions, may represent a promising therapy to slow the progression of diabetic kidney disease.
View original scientific description
Kidney disease is a common problem among people with type 1 diabetes and can lead to disability, dialysis, and early death. Inflammation plays a key role in the development of kidney disease in type 1 diabetes and targeting leukotrienes, inflammatory chemicals the body releases in response to allergic reactions, may represent a promising therapy to slow the progression of diabetic kidney disease. The current proposal will investigate whether montelukast, a leukotriene blocker, lowers increased levels of protein in the urine (an early marker of diabetic kidney disease), and improves kidney and cardiovascular function in people with type 1 diabetes and kidney disease.
Interventions
DRUG
Montelukast
10mg daily
OTHER
Placebo
1 capsule daily
Primary outcome measures
Change in Albuminuria
Time frame: Baseline, 6 months
Change in albuminuria from baseline to 6 months
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Age 18-80 years
- Type 1 diabetes for at least 5 years
- Urine albumin to creatinine ratio 30-5000 mg/g on first morning void
- eGFR 30-89 ml/min/1.73m2 at time of screening
- Blood pressure \<140/90 mm Hg prior to randomization
- Use of angiotensin converting enzyme inhibitor or angiotensin receptor blocker with stable dose for 4 weeks
- BMI \< 40 kg/m2 (FMDBA measurements can be inaccurate in severely obese patients).
- Stable anti-hypertensive regimen for at least one month prior to randomization
- Stable regimen of insulin delivery, i.e. automated insulin delivery (AID) system or multiple daily injections) 4 weeks prior to randomization
- Sedentary or recreationally active (≤2 days of vigorous aerobic exercise as vigorous exercise may affect vascular function measurements)
- Able to provide consent
Exclusion criteria
- Significant comorbid conditions that lead the investigator to conclude that life expectancy is less than 1 year
- Uncontrolled hypertension
- Factors judged to limit adherence to interventions
- Anticipated initiation of dialysis or kidney transplantation within 6 months
- Current participation in another research study
- Pregnancy or planning to become pregnant or currently breastfeeding
- Allergy to aspirin
- Severe hepatic impairment (Child-Pugh Class C)
- History of major psychiatric disorder
- Use of inhaled or systemic corticosteroids or long-acting beta agonists (higher risk of neuropsychiatric reaction)
- Penicillin allergy
- Iodine allergy
- Shellfish allergy
- Current use of phenobarbital, rifampin or carbamazepine
Where
- Aurora, Colorado
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Jun 30, 2026 · Source of record for eligibility and locations