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Scientists track type 1 diabetes triggers in families

NCT ID NCT03648918

Knowledge-focused Sponsor: Medical College of Wisconsin Source: ClinicalTrials.gov ↗

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study aims to understand the step-by-step process that causes type 1 diabetes by looking at genetics and environment. Researchers will follow families with a history of the disease, as well as healthy controls, for up to 10 years. Participants provide a blood sample, medical history, and annual checkups. The goal is to learn how autoimmunity starts, not to test a treatment.

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.

Participants

About 4,000 people

The number the study aims to enrol. It can still change while the study runs.

Started

Aug 2001

Expected to finish

Jan 2050

An estimate. End dates often move.

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.

Who is studied

Patients with T1D seen at clinics at the Children's Wisconsin (n\~1500) and Froedtert Hospital (n\~800) will be targeted. In families with a child proband, siblings will be asked to join the study. If the diabetic child has an aunt, uncle, or cousin with T1D, then siblings in that nuclear family will also be recruited. Adult proband families will include the adult affected by T1D and their children. Adult proband families must include children \<17 years of age. If the adult proband has a sibling, niece, or nephew with T1D, siblings in that nuclear family will be recruited as well. The age-of-diagnosis criterion for the proband will be less than 39 years and insulin therapy started within 5 years of diagnosis.

Ages

2 years and older

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show 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 (Families): * Families where at least one first-degree family member has type 1 diabetes * The diabetic proband in the family was diagnosed before the age of 39 * Family members must be at least 2 years old to participate Exclusion Criteria (Families): * Families with no history of type 1 diabetes * Families with a history of diabetes that is not type 1 (LADA, MODY, type 2 etc.) Inclusion Criteria (Controls): * No family history of type 1 diabetes or other autoimmune conditions * Age 2 or older Exclusion Criteria (Controls): * Personal or family history of autoimmune disease

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Conditions

The condition(s) this trial relates to.

diabetes mellitus type 1 diabetes mellitus type 1 diabetes mellitus 1

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Diabetes mellitus Diabetes mellitus, type 1 TYPE1 diabetes mellitus TYPE1DIABETES

How to take part

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  1. The study's own enquiry address

    This study publishes an address for enquiries. See it below .

  2. The places running it

    1 site. The list below names each one and where it is.

  3. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  4. A doctor treating you

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Contacts and locations

Study contacts

  • Contact

    Email: •••••@•••••

Locations

  • Medical College of Wisconsin

    RECRUITING

    Milwaukee, Wisconsin, 53226, United States

    Contact Email: •••••@•••••

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