Clinical trial Recruiting at 1 site Phase 4 Interventional Ages 18 to 80

Montelukast's effect on kidney and vascular health in type 1 diabetes

Official title: Effect of Montelukast on Kidney and Vascular Function in Type 1 Diabetes

Run by University of Colorado, Denver · NCT05498116 · Data updated 2026-11-12

This study is testing if the medication montelukast can help improve kidney and heart health in adults with type 1 diabetes who have early signs of kidney problems.

More Albuminuria trials

Quick facts

PhasePhase 4
Study typeInterventional
Ages18 Years to 80 Years
SexAll
Enrollment50 (estimated)
SponsorUniversity of Colorado, Denver
Academic / other
Locations1 site (Aurora, Colorado)
StatusRecruiting
StartedJanuary 26, 2023
Main results expectedFebruary 2027
Study endsApril 2027
Registry record updatedJune 30, 2026
Trial IDNCT05498116 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults aged 18-80 with type 1 diabetes for at least 5 years and evidence of early kidney disease.

Probably not a fit

Patients with significant comorbid conditions or uncontrolled hypertension 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 investigates the impact of montelukast, a leukotriene receptor antagonist, on kidney and cardiovascular function in individuals with type 1 diabetes who exhibit early signs of kidney disease, specifically albuminuria. Participants will be randomized to receive either montelukast or a placebo, and the primary outcome will be the reduction of protein levels in urine, which indicates kidney function. The study aims to determine if targeting inflammation can slow the progression of diabetic kidney disease. Eligible participants include adults aged 18-80 with a history of type 1 diabetes and specific kidney function parameters.

Why it matters

Potential benefit: If successful, this treatment could slow the progression of kidney disease in patients with type 1 diabetes, potentially reducing the need for dialysis and improving overall health outcomes.

How similar studies have gone: While targeting inflammation in diabetic kidney disease is a promising approach, the specific use of montelukast in this context is novel and has not been extensively tested in prior studies.

Who can join: the full rules

Show full inclusion / exclusion criteria
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 it's running

  • University of Colorado Anschutz Medical Campus
    Aurora, Colorado, United States
    Recruiting

Study contacts

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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.