Clinical trial Recruiting at 1 site Phase 1 Interventional Ages 18 to 60

RGB-5088 islet cell transplantation for Type 1 diabetes

Official title: A Single-Center, Single-Arm, Open-Label Phase I Clinical Trial Evaluating the Safety and Efficacy of RGB-5088 Islet Cell Injection in the Treatment of Type 1 Diabetes Mellitus

Run by Hangzhou Reprogenix Bioscience, Inc · NCT06731218 · Data updated 2026-11-12

This trial will test whether transplanted RGB-5088 islet cells can safely reduce severe hypoglycemia and lower insulin needs in adults with Type 1 diabetes and very low C-peptide.

More Diabetes Mellitus trials

Quick facts

PhasePhase 1
Study typeInterventional
Ages18 Years to 60 Years
SexAll
Enrollment10 (estimated)
SponsorHangzhou Reprogenix Bioscience, Inc
Industry-sponsored
Locations1 site (Tianjin, Tianjin Municipality)
StatusRecruiting
StartedFebruary 17, 2025
Main results expectedDecember 31, 2027
Study endsDecember 31, 2031
Registry record updatedSeptember 15, 2025
Trial IDNCT06731218 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults 18–60 years old with Type 1 diabetes, stimulated C-peptide below 0.3 ng/mL, and at least one severe hypoglycemic event in the past year who meet the study's medical and contraceptive requirements are the intended participants.

Probably not a fit

People with Type 2 diabetes, untreated proliferative diabetic retinopathy, serious cardiac or gastrointestinal disease, active malignancy, substance abuse, or pregnant or breastfeeding women are not likely to benefit or are excluded from participation.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This is a Phase I, single-center, single-arm, open-label trial of RGB-5088 islet cell transplantation in adults with Type 1 diabetes. The study enrolls patients aged 18–60 with stimulated C-peptide < 0.3 ng/mL who have had at least one severe hypoglycemic episode in the prior 12 months. Participants will receive RGB-5088 transplantation and undergo close monitoring for safety, changes in C-peptide, insulin requirements, and episodes of hypoglycemia. The main goal is to characterize safety and early signals of therapeutic effect to guide further development.

Why it matters

Potential benefit: If successful, RGB-5088 transplantation could reduce severe hypoglycemia and lower daily insulin requirements by restoring some endogenous insulin production.

How similar studies have gone: Previous islet cell transplantation approaches have shown short-term success in reducing severe hypoglycemia and insulin needs for some patients but often require immunosuppression and rarely produce durable, long-term insulin independence.

Who can join: the full rules

Show full inclusion / exclusion criteria
Key Inclusion Criteria:

* Age: 18-60 years old (including 18 and 60 years old), male and female;
* Type 1 diabetes patients (including those who have received organ transplantation such as liver and kidney);
* Stimulated C-peptide \< 0.3 ng/mL;
* The patient had at least one severe hypoglycemia within 12 months before being included in the project

Key Exclusion Criteria:

* Type 2 diabetes patients;
* Untreated proliferative diabetes retinopathy;
* Serious heart disease;
* Serious gastrointestinal dysfunction ;
* Serious psychological diseases;
* Any history of malignancy;
* Have a history of tobacco, alcohol and drug abuse;
* For female subjects: pregnancy test positive, lactation or unwilling to use effective contraceptive measures during the study period, male patients: intent to procreate or unwilling to use effective contraceptive measures during the study period.

Where it's running

  • Tianjin First Center Hospital
    Tianjin, Tianjin Municipality, China
    Recruiting

Study contacts

Similar studies

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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.