Diabetes drug semaglutide may boost blood vessel repair cells, small study hints
NCT ID NCT04126603
First seen Jun 26, 2026 · Last updated Jun 26, 2026
Summary
This completed phase 4 trial tested whether semaglutide (a GLP-1 agonist drug) can improve the health of blood vessel repair cells and fat stem cells in people with type 2 diabetes. Ten participants received either semaglutide or a placebo for 24 weeks. Researchers measured changes in stem cell numbers, movement, and gene activity, as well as body composition and artery stiffness. The goal was to see if semaglutide could protect blood vessels and promote weight loss beyond its blood sugar effects.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Semaglutide (a GLP-1 receptor agonist drug)
- What this could lead to
- If it works, this could show that semaglutide helps protect blood vessels and improve fat cell function in people with type 2 diabetes, potentially reducing heart disease risk.
- What could go wrong
- This is a very small, early-phase trial (only 10 participants completed) looking at cell markers, not clinical outcomes. Results may not translate to real-world benefits, and the drug has known side effects like nausea and vomiting.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
-
Phase 4
Runs after approval, following long-term safety and how well the treatment works in everyday use.
- Participants
-
10 people
The number who actually took part.
- Started
-
Aug 2019
- Finished
-
May 2025
- Lead sponsor
-
Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
-
20 to 90 years
- Sex
-
Anyone
- Healthy volunteers
-
Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria * Age 20-90 * Diagnosed with Type 2 diabetes mellitus * Body Mass Index (BMI) between 25.0-45.0 (both inclusive) * eGFR ≥ 30 mL/min/1.73 m2 by MDRD * HbA1C 6.5 - 12.0 % * Subjects on lifestyle modification alone, or Metformin (0.5-2 grams), insulin, or in combination, in any doses of either Metformin or Insulin for at least 3 months prior to screening. 2 week washout of any other anti-hyperglycemic. * Ability to provide informed consent (and document informed consent by signature) before any trial-related activities are conducted. * Additional CVD risk factor such microalbuminuria or proteinuria (as defined by ADA, UACR \> 30 mg/g), hypertension (labile, uncontrolled hypertension or controlled on anti-hypertensives) and left ventricular hypertrophy, left ventricular systolic or diastolic dysfunction, or an ankle brachial index \[the ratio of the systolic blood pressure at the ankle to the systolic blood pressure in the arm\] of less than 0.9, low HDL with hypertriglyceridemia (as defined by NCEP ATP III) , strong family history of CHD (as defined by NCEP ATP III and ATP IV). * Retinal examination within last 2 years of enrollment, showing no proliferative retinopathy Exclusion Criteria * Uncontrolled hyperglycemia with fasting glucose \>300 mg/dL (\>16.6 mmol/L) * Liver disease with ALT, AST or ALP ≥ x3 ULN * Known (recent) personal history of cerebral stroke or heart attack (myocardial infarction) within last 6 months * Personal or family history of medullary thyroid cancer (MTC) * Personal or family history of Multiple Endocrine Neoplasia Syndrome Type 2 (MEN 2) * GFR \<30 mL/min/1.73 m2 by MDRD * Prior surgery with chronic malabsorption (eg, bariatric) within last 1 year * Clinically significant RBC disorders such as hemoglobinopathies * Diagnosis of Type 1 diabetes mellitus or history of GAD antibody positive status * Chronic use of high dose anti-inflammatory drugs for the last 3 months * Beginning statin medications or change in statin dose within the past 1 month * Starting use of high-dose steroid medication (100mg hydrocortisone or 40mg prednisone equivalent) within the last 1 month * History of acute pancreatitis within the past 2 years * Known or suspected allergy to GLP-1 agonists, excipients, or related products. * Active smokers, \>5 per day (at present) * Any other clinical condition that would jeopardize patients safety while participating in this clinical trial * Women of child bearing potential who are not willing to use a contraceptive method to avoid pregnancy for the 16 weeks of study duration plus 2 months post treatment (for semaglutide washout). * Women who are pregnant or breastfeeding * Chronic or persistent alcohol or drug abuse * Prisoners or subjects who are involuntarily incarcerated * Subjects who are compulsorily detained for treatment of either a psychiatric or physical (eg. infectious disease) illness * Participation in another trial with an investigational drug within 30 days prior to informed consent. * Untreated or active hemorrhagic proliferative diabetic retinopathy Exclusionary Laboratory Findings * Chronic Kidney Disease (CKD) stage 5 (estimated CrCl less than 15 mL/min) * Triglycerides \> 500 mg/dL * Low hematocrit (\<28 Units)
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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The GW Medical Faculty Associates
Washington D.C., District of Columbia, 20037, United States
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Washington VA Medical Center
Washington D.C., District of Columbia, 20422, United States
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