The Gut Microbiome in Type 1 Diabetes and Mechanism of Metformin Action

NCT ID: NCT05414409

Last Updated: 2025-07-25

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

PHASE2

Total Enrollment

114 participants

Study Classification

INTERVENTIONAL

Study Start Date

2022-09-30

Study Completion Date

2026-11-02

Brief Summary

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Ovwerweight and obesity prevalence in persons with T1D has increased, which further complicates management and risk for complications. The proposed study is relevant to public health because it helps us understand the role of the gut microbiome in disease pathophysiology in T1D youth with overweight and obesity as well as potential mechanisms to modify disease.

Detailed Description

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Conditions

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Type 1 Diabetes Obesity

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

SEQUENTIAL

The investigators will examine the differences in the gut microbiome between lean and overweight/obese youth with type 1 diabetes and then enroll the overweight/obese youth with type 1 diabetes into the clinical trial to receive metformin as an intervention.
Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Comparison of microbiome by BMI Category

The gut microbiome and metabolites of 42 lean and 42 overweight/obese youth with type 1 diabetes will be evaluated cross-sectionally.

Group Type NO_INTERVENTION

No interventions assigned to this group

Metformin

This is a group of 30 youth with type 1 diabetes and overweight/obesity who will receive metformin for 6 months.

Group Type EXPERIMENTAL

Metformin

Intervention Type DRUG

Metformin is an oral medication that improves insulin sensitivity.

Interventions

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Metformin

Metformin is an oral medication that improves insulin sensitivity.

Intervention Type DRUG

Eligibility Criteria

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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.
Minimum Eligible Age

11 Years

Maximum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

NIH

Sponsor Role collaborator

Heba M. Ismail

OTHER

Sponsor Role lead

Responsible Party

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Heba M. Ismail

Assistant Professor of Pediatrics

Responsibility Role SPONSOR_INVESTIGATOR

Locations

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Indiana University School of Medicine

Indianapolis, Indiana, United States

Site Status RECRUITING

Countries

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United States

Central Contacts

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Heba M Ismail

Role: CONTACT

317-274-2114

HI Team

Role: CONTACT

317-274-2114

Facility Contacts

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Heba Ismail

Role: primary

317-278-7856

HI Team

Role: backup

317-278-7042

Other Identifiers

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1K23DK129799

Identifier Type: NIH

Identifier Source: secondary_id

View Link

15498

Identifier Type: -

Identifier Source: org_study_id

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