Effects of semaglutide on heart health in type 1 diabetes

Type 1 Diabetes Impacts of Semaglutide on Cardiovascular Outcomes

Phase 3 Interventional University of Colorado, Denver · NCT05819138

This study is testing whether the medication semaglutide can improve heart and kidney health in adults with type 1 diabetes.

Quick facts

PhasePhase 3
Study typeInterventional
Enrollment60 (estimated)
Ages18 Years to 49 Years
SexAll
SponsorUniversity of Colorado, Denver Academic / other
Locations2 sites (Aurora, Colorado and 1 other locations)
Trial IDNCT05819138 on ClinicalTrials.gov

What this trial studies

This trial investigates how semaglutide, a medication known for its benefits in type 2 diabetes, affects cardiovascular function, kidney function, and insulin sensitivity in adults with type 1 diabetes. The study involves administering semaglutide or a placebo to participants aged 18-49 who have been diagnosed with type 1 diabetes and meet specific health criteria. The goal is to determine the efficacy of semaglutide in improving health outcomes for this population, as it is not currently FDA-approved for use in type 1 diabetes. The trial is considered experimental and aims to provide insights into potential new treatment options.

Who should consider this trial

Good fit: Ideal candidates are adults aged 18-49 with a diagnosis of type 1 diabetes who are using insulin pumps or automated insulin delivery systems.

Not a fit: Patients with poorly controlled diabetes, severe complications, or certain medical histories may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could lead to improved cardiovascular and kidney health for patients with type 1 diabetes.

How similar studies have performed: Other studies have shown positive outcomes with semaglutide in type 2 diabetes, but its effects in type 1 diabetes are still being explored.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Age 18-49 years
* 1\) T1D diagnosis defined as positive T1D-associated antibody(ies) or 2) a clinical diagnosis of T1D plus insulin requirement since diagnosis
* Insulin pump or automated insulin delivery systems
* Estimated glomerular filtration rate (eGFR) ≥ 45 ml/min/1.73m2
* Stable doses of drugs altering cardiovascular and renal function (e.g., Angiotensin-Converting Enzyme Inhibitor (ACEi), Angiotensin Receptor Blocker (ARB), statins, diuretics)
* BMI 20-45 kg/m2
* Adequate contraceptive method for females

Exclusion Criteria:

* HbA1c \>9%, recent diabetic ketoacidosis (DKA) or hospitalization
* Major congenital heart disease, anemia, severe non-proliferative retinopathy, proliferative retinopathy
* History/family history of medullary thyroid carcinoma, multiple endocrine neoplasia type 2 (MEN2), pancreatitis
* Current/planned pregnancy or nursing
* Uncontrolled thyroid disease or hypertension (HTN) (≥ 160/100 mm Hg despite optimal therapy)
* Use of other non-insulin diabetes medications, insulin sensitizing medications, or systemic steroids in past 3 months
* Use of atypical antipsychotics
* Significant systemic illness such as cancer
* Shellfish/iodine allergy (only exclusionary to iohexol clearance procedure)
* MRI or PAH contraindications (only exclusionary to MRI and PAH procedures), GLP-1RA allergy

Where this trial is running

Aurora, Colorado and 1 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Diabetes Mellitus, Type 1
Last reviewed 2026-06-13 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.