ClinicalTrials.gg
RecruitingNCT05498116Updated Jun 30, 2026

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

A Phase 4 interventional study of Montelukast and Placebo in Albuminuria, sponsored by University of Colorado, Denver. Recruiting at 1 site in United States. Open to participants aged 18 Years to 80 Years. Per ClinicalTrials.gov, last updated 2026-06-30.

Sponsored by University of Colorado, Denver · Phase 4, Interventional, and Treatment

From the registry’s dates

  • Started Jan 2023; still recruiting 3 years 9 months later.
Phase
Phase 4
Study type
Interventional
Enrollment
50
Allocation
Randomized
Ages
18 Years to 80 Years
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 50 studies in Albuminuria with a site in United States — 9 open to participants now, 11 under way, none of them phase 3. Albuminuria · United States.

Planned enrollment
24th of 42
50 · median 60
Started
2023
with 1 other
Phase 4
6 of 50
2 open now
Registered
40th of 50
by date

Among the 50 studies in Albuminuria with a site in United States, this one is the 24th largest by planned enrollment of the 42 interventional ones, is one of 2 that started in 2023, is one of 6 in phase 4, and was the 40th registered.

By phase

50 studies; the count open now beside each. This study's row is marked.

No phase17 · 2 open
Phase 215 · 2 open
Observational8 · 3 open
Phase 4this study6 · 2 open
Phase 2/32 · 0 open
Phase 32 · 0 open

By the year they started

First in 2001; this study’s year is marked. 2 started in 2023.

Size and results

Median enrollment 60 across the 42 interventional studies, 403 across the 8 observational. Of the 38 that completed or were terminated, 20 (53%) have results posted.

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Watch this landscapeDownload CSVWith an account: a weekly mail of what changed among 50 studies in Albuminuria with a site in United States, or all of them as a file.
02

Study summary

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.

03

Conditions studied

  • Albuminuria

Browse trials for

04

Who can participate

Ages eligible
18 Years to 80 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

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
  • 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
  • \< 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

Exclusion Criteria:

  • Significant comorbid conditions that lead the investigator to conclude that 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 ( Class C)
  • History of major psychiatric disorder
  • Use of inhaled or systemic or long-acting beta agonists (higher risk of neuropsychiatric reaction)
  • Penicillin allergy
  • Iodine allergy
  • Shellfish allergy
  • Current use of phenobarbital, rifampin or carbamazepine
Terms in these criteria, in plain language(5)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

GFR and eGFR (kidney filtering)

GFR (glomerular filtration rate) is how much blood the kidneys filter each minute. It is usually estimated from a blood test — eGFR, by formulas such as CKD-EPI or MDRD — and some studies ask for it to be measured directly instead. Usually given in mL/min/1.73 m².

Check the method, the units and the minimum the study states. A value of 90 or above is in the normal-or-high range, but kidney damage can show in other tests too.

BMI (body mass index)

Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.

What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.

Life expectancy

The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.

Child-Pugh class

A score of how well the liver works in people with liver disease such as cirrhosis: class A is mild, B moderate and C severe.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

05

Study design

Phase
Phase 4
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
50 participants (estimated)

Study arms

  • Placebo comparator
    Placebo

    One capsule daily

    Other: Placebo

  • Experimental
    Montelukast

    One 10mg capsule daily

    Drug: Montelukast

Interventions

06

What researchers measure

Primary outcomes

  1. Change in Albuminuria

    Change in albuminuria from baseline to 6 months

    Time frame: Baseline, 6 months

Secondary outcomes

  1. Change in Brachial artery flow mediated dilation (FMD)

    Change in FMD from baseline to 6 months

    Time frame: Baseline, 6 months

  2. Change in Large Elastic Artery Stiffness

    Change in aortic pulse wave velocity from baseline to 6 months

    Time frame: Baseline, 6 months

07

Study locations

1 of 1 sites recruiting
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Started Jan 2023 (actual). Primary completion is estimated for Feb 2027, 49 months after the start.

How these figures are worked out, and which studies are left out of them.

Registered
Aug 9, 2022
First posted
Aug 11, 2022
StartActual
Jan 26, 2023
Primary completionEst.
Feb 2027
CompletionEst.
Apr 2027
Last update
Jun 30, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Jun 30, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05498116
Responsible party
Sponsor
First posted
Aug 11, 2022
Start date
Jan 26, 2023
Primary completion
Feb 2027 (estimated)
Completion
Apr 2027 (estimated)
Last update
Jun 30, 2026

Study contacts

Jessica Kendrick
Contact
Jessica.Kendrick@cuanschutz.edu
3037244837
Jessica Kendrick, MD
principal investigator · University of Colorado Denver | Anschutz

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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Studies of the drug tested here: Montelukast

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