Clinical trial Recruiting at 1 site Phase 2 Interventional Ages 11 to 18

Exploring the gut microbiome's role in type 1 diabetes and metformin's effects

Official title: The Gut Microbiome in Lean and Overweight Youth With Type 1 Diabetes and Novel Mechanism of Action of Metformin

Run by Indiana University · NCT05414409 · Data updated 2026-11-12

This study is testing how the gut bacteria of obese teens with type 1 diabetes affects their condition and whether the diabetes drug metformin can help improve their health.

Quick facts

PhasePhase 2
Study typeInterventional
Ages11 Years to 18 Years
SexAll
Enrollment114 (estimated)
SponsorIndiana University
Academic / other
Locations1 site (Indianapolis, Indiana)
StatusRecruiting
StartedSeptember 30, 2022
Main results expectedNovember 2, 2026
Study endsMarch 1, 2027
Registry record updatedAugust 21, 2026
Trial IDNCT05414409 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates for this study are obese and lean youth aged 11-18 who have been diagnosed with type 1 diabetes.

Probably not a fit

Patients with monogenic forms of diabetes, type 2 diabetes, or those with certain gastrointestinal diseases 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 relationship between the gut microbiome and type 1 diabetes (T1D) in obese youth aged 11-18. It aims to understand how the gut microbiome influences disease progression and the mechanisms through which metformin, a diabetes medication, may modify these effects. By comparing obese and lean youth with T1D, the study seeks to uncover potential therapeutic targets for improving management of the disease. The findings could provide insights into personalized treatment strategies for T1D patients.

Why it matters

Potential benefit: If successful, this study could lead to improved management strategies for type 1 diabetes in youth, particularly those who are obese.

How similar studies have gone: While the role of the gut microbiome in diabetes is an emerging field, this specific approach combining metformin and T1D in youth is relatively novel and has not been extensively tested.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Overweight/obese youth 11-18 years of age with T1D at time of enrollment.
2. Lean youth 11-18 years of age with T1D at time of enrollment.

Exclusion Criteria:

1. Known monogenic forms of diabetes or Type 2 diabetes (confirmed clinically and by genetic/antibody testing).
2. History of ongoing infection or antibiotic treatment within the past month;
3. History of immune-compromise, recurrent infections, steroid intake (inhaled or oral forms) or other immunosuppressant use in the past 6 months.
4. History of chronic gastrointestinal disease and active within the past 6 months, possible or confirmed celiac disease.
5. Participation in any research intervention trials within the past 3 months.
6. History of treatment or use of metformin, a type 2 diabetes medication.

Where it's running

  • Indiana University School of Medicine
    Indianapolis, Indiana, United States
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

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.