Clinical trial Recruiting at 1 site Observational Ages 18 and up

Islet re-transplantation after prior graft failure in adults with type 1 diabetes

Official title: Efficacy and Safety of Islet Re-transplantation After Failure of Beta-cell Replacement

Run by University Hospital, Montpellier · NCT07666789 · Data updated 2026-11-12

This study looks at whether giving another islet transplant after a prior failed graft helps adults with type 1 diabetes who have severe swings in blood sugar.

Quick facts

Study typeObservational
Ages18 Years and up
SexAll
Enrollment20 (estimated)
SponsorUniversity Hospital, Montpellier
Academic / other
Locations1 site (Montpellier)
StatusRecruiting
StartedJuly 31, 2025
Main results expectedSeptember 30, 2026
Study endsSeptember 30, 2026
Registry record updatedJune 24, 2026
Trial IDNCT07666789 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults (18+) with type 1 diabetes who had a prior islet or pancreas transplant and underwent islet re-transplantation after 2005 following documented graft failure.

Probably not a fit

Patients without prior graft failure, without available data, or those not meeting inclusion criteria may not benefit from these findings.

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

What this trial studies

This multicenter retrospective study analyzes adults with type 1 diabetes who had a prior beta-cell replacement and then received an islet re-transplant after graft failure. It examines safety and effectiveness, including graft survival and recurrent hypoglycemia, using data from several French university hospitals. The study notes concerns about alloimmunization from repeated donor exposure and aims to clarify outcomes after second islet transplantation. Interventions are not specified in detail, and eligibility requires documented graft failure and available clinical data. The lead sponsor is University Hospital, Montpellier, with collaboration from additional French centers.

Why it matters

Potential benefit: If successful, findings could inform clinical decisions about offering islet re-transplantation to patients with failed prior grafts and potentially extend graft function.

How similar studies have gone: Previous islet transplantation studies show variable graft survival; this study explores a newer question of repeat transplantation after prior failure, which is less well characterized.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Age ≥ 18 years
* Diagnosis of type 1 diabetes
* Prior beta-cell replacement therapy : islet transplantation or pancreas transplantation
* Islet re-transplantation performed after 2005
* Islet re-transplantation performed after documented beta cell graft failure, defined by undetectable C-peptide and/or recurrence of severe hypoglycemia on insulin therapy
* Availability of clinical and biological data required for assessment of study outcomes

Exclusion Criteria:

* Missing or incomplete data preventing assessment of the primary outcome
* Patients who did not meet inclusion criteria

Where it's running

  • Montpellier University Hospital
    Montpellier, France
    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.