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.
Quick facts
| Phase | Phase 1 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years to 60 Years |
| Sex | All |
| Enrollment | 10 (estimated) |
| Sponsor | Hangzhou Reprogenix Bioscience, Inc Industry-sponsored |
| Locations | 1 site (Tianjin, Tianjin Municipality) |
| Status | Recruiting |
| Started | February 17, 2025 |
| Main results expected | December 31, 2027 |
| Study ends | December 31, 2031 |
| Registry record updated | September 15, 2025 |
| Trial ID | NCT06731218 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
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Tianjin First Center Hospital
Tianjin, Tianjin Municipality, China Recruiting
Study contacts
- Study coordinator: Linlin Jiang
- Email: Linlin.jiang@reprogenix.com
- Phone: +86+571-88601920
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.