B-Lymphocyte Immunotherapy in Islet Transplantation: Toward Calcineurin-Inhibitor Free Immunosuppression (CIT-05/08)
Study Design: Clinical Trial
Conditions: Diabetes Mellitus, Diabetes Mellitus, Type 1
Duration: 2008 – 2011
# Recruitment Centers: 1
Treatment: Immunosuppressive medication regimen containing rituximab
Available Genotype Data: No
Image Summary: No
Transplant Type: Islet Cell Transplant
Does it have dialysis patients: No
Access to samples for B-Lymphocyte Immunotherapy in Islet Transplantation: Toward Calcineurin-Inhibitor Free Immunosuppression (CIT-05/08) is currently only available via collaboration. Please contact the parent study to ask about ancillary study opportunities.
The CIT consortium conducted a total of 9 studies across North America (CIT02 through CIT08) and the Nordic region (CIT01). CIT08 was a long-term follow-up study for interested participants at the North American sites. The target population is individuals with type 1 diabetes, normal kidney function, and intractable hypoglycemia. All studies treated participants with up to 3 separate infusions of islets. Subjects in CIT05 received, in an open label-fashion, the anti-CD20 agent rituximab in combination with rabbit anti-thymocyte globulin (ATG; daclizumab or basiliximab instead of ATG for the 2nd and 3rd transplants, if applicable) for induction and sirolimus alone for maintenance, a calcineurin-inhibitor free regimen.
The study aimed to determine the safety and efficacy of islet transplantation when combined with an immunosuppressive medication regimen containing rituximab.
The primary outcome measure was the proportion of participants with insulin independence at 75 days following the first transplant infusion. Secondary outcome measures included reduction in insulin requirements, mean amplitude of glycemic excursions, HbA1c levels, incidence of immune sensitization (defined by detected anti-HLA antibodies not present prior to transplantation), and quality of life.
Individuals who met the following criteria were eligible for enrollment:
Clinical history compatible with type 1 diabetes with onset at less than 40 years of age, insulin dependence for at least 5 years at study entry, and a sum of age and insulin dependent diabetes duration of at least 28
Absent stimulated C-peptide (less than 0.3 ng/mL) 60 and 90 minutes post-mixed-meal tolerance test
Involvement of intensive diabetes management, defined as: (1) Self-monitoring of glucose values no less than a mean of three times each day averaged over each week; (2) Administration of three or more insulin injections each day or insulin pump therapy; (3) Under the direction of an endocrinologist, diabetologist, or diabetes specialist with at least three evaluations during the 12 months prior to study enrollment
At least one episode of severe hypoglycemia in the 12 months prior to study enrollment
Reduced awareness of hypoglycemia.
Exclusion criteria are documented in the study protocol.
This study was terminated for lack of efficacy.