Diabetes Islet Preservation Immune Treatment

Diabetes Mellitus Clinical Trial

— DIPIT  

Official title:

A Pilot, Safety and Feasibility Trial of Anti-Thymocyte Globulin (ATG), Low Dose Interleukin-2 (IL-2), Adalimumab and Exenatide in the Treatment of New-Onset Type 1 Diabetes

Clinical Trial Details — Status: Withdrawn

Administrative data

• NCT number: NCT02586831
• Other study ID #: 20150856
• Status: Withdrawn
• Phase: Phase 1/Phase 2
• Start date: January 2025
• Est. completion date: December 2029

Study information

• Verified date: June 2024
• Source: University of Miami
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

To assess whether there is a difference in endogenous insulin secretion, measured as stimulated C-peptide secretion (area under the curve during a 4-hour mixed meal tolerance test), at the 1 year visit, for study subjects receiving combinational therapy versus those receiving placebo. The study will also examine the effect of the proposed treatments on immunological outcomes, specifically proportion of regulatory T cells at the 1 year visit.

Recruitment information / eligibility

• Status: Withdrawn
• Enrollment: 0
• Est. completion date: December 2029
• Est. primary completion date: December 2028
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years to 35 Years

Eligibility

Inclusion Criteria:

• Patients must meet all of the following criteria to be eligible to participate in this study:

1. Subject must be able to understand and provide informed consent.

2. Males and females, 18-35 years of age.

3. New onset T1D for no longer than 120 days at the time of randomization.

4. Affected by T1D, according to ADA standard criteria, and confirmed by positivity of at least one T1D-associated autoantibody, to GAD65, IA-2, ZnT8, or insulin autoantibodies (if patient has been treated with insulin for less than 2 weeks).

5. Being on insulin therapy.

6. Stimulated C-peptide peak level >0.2 nmol/L at the baseline 1 visit MMTT.

7. Female subjects of childbearing potential must have a negative pregnancy test upon study entry.

8. Female (and male) subjects with reproductive potential must agree to use two FDA approved methods of birth control for the entire duration of the study.

9. Adequate venous access to support study required blood draws.

Exclusion Criteria:

• Potential participants must not meet any of the following exclusion criteria:

1. Inability or unwillingness of a participant to give written informed consent or comply with study protocol.

2. BMI>30 Kg/m2.

3. Contra-indications to ATG, GCSF, exenatide, etanercept and IL-2 (as per package insert, e.g., knowledge of hypersensitivity to drugs or its excipients).

4. Uncompensated heart failure, fluid overload, myocardial infarction or liver disease or severe impairment of a vital organ within the last 6 weeks before enrollment.

5. Any of the following laboratory findings: hemoglobin <10.0 g/dL; leukocytes <3,000/µL; neutrophils <1,500/µL; lymphocytes <800/µL; platelets <100,000/µL.

6. Any sign or diagnosis of significant chronic active infection (e.g., hepatitis, tuberculosis, EBV, or CMV), or screening laboratory evidence consistent with a significant chronic active infection (such as positive for HIV, IGRA test for TB, or hepatitis B-C).

7. Ongoing acute infections, e.g., acute respiratory tract urinary tract, or gastrointestinal tract infections.

8. Ongoing or anticipated use of diabetes medications other than insulin.

9. Current or ongoing use of non-insulin pharmaceuticals that affect glycemic control within prior 7 days of screening.

10. Current or prior use of immunomodulators or systemic steroids in the last 2 months that could potentially affect diabetes or immunologic status.

11. Recent recipient of any licensed or investigational live attenuated vaccine(s) within 6 weeks of randomization.

12. Use of investigational drugs within 3 months of participation.

13. Concomitant therapy with immunosuppressive drugs, immunomodulators, or cytotoxic agents, or previous therapy less than 3 months from randomization.

14. History or diagnosis of malignancy. Any history of gastroparesis or other severe gastrointestinal disease, pancreatitis, thyroid nodules or malignancy with the exception of a history of localized basal cell carcinoma.

15. Presence of an allograft.

16. AST, ALT or Alkaline Phosphatase >2 times upper limit of normal or total bilirubin >1.5 times upper limit of normal.

17. Current, diagnosed, mental illness or current, diagnosed or self-reported drug or alcohol abuse; or any situation that, in the opinion of the investigator, would interfere with the participant's ability to comply with study requirements.

18. Pregnancy or ongoing breastfeeding for women; unwillingness or inability of both females and males of childbearing age to use a reliable and effective form of contraception, for the entire duration of the study.

19. Past or current medical problems, or findings from physical examination, or laboratory testing, that are not listed above which, in the opinion of the investigator, may pose additional risks from participation in the study, may interfere with the participant's ability to comply with study requirements or that may impact the quality or interpretation of the data obtained.

Related Conditions & MeSH terms

• Autoimmune Diseases
• Diabetes Mellitus
• Diabetes Mellitus, Type 1
• Hypoglycemia

Intervention

Drug:
• Anti-Thymocyte Globulin (ATG)
2.5 mg/kg administered as two divided infusions of 0.5 mg/kg and 2 mg/kg on Days 1 and 2.
• Interleukin 2
1 million IU per dose administered subcutaneously for 5 consecutive days on Days 10-14, and then every two weeks.
• Exenatide
2 mg administered subcutaneously weekly for up to 52 weeks.
• Adalimumab
50 mg administered subcutaneously once a month for 1 year.

Other:
• ATG Placebo
ATG placebo mimicking Thymoglobulin administered intravenously.
• IL-2 Placebo
IL-2 placebo mimicking Aldesleukin administered subcutaneously.
• Adalimumab Placebo
Placebo mimicking Adalimumab administered subcutaneously.
• Exenatide Placebo
Placebo mimicking Exenatide administered subcutaneously.

Locations

Country	Name	City	State
United States	Diabetes Research Institute, University of Miami Miller School of Medicine	Miami	Florida

Sponsors (2)

Lead Sponsor	Collaborator
Camillo Ricordi and Jay Skyler	Diabetes Research Institute Foundation

Country where clinical trial is conducted

United States, 

References & Publications (2)

Skyler JS, Ricordi C. Stopping type 1 diabetes: attempts to prevent or cure type 1 diabetes in man. Diabetes. 2011 Jan;60(1):1-8. doi: 10.2337/db10-1114. No abstract available. — View Citation

Skyler JS. Prevention and reversal of type 1 diabetes--past challenges and future opportunities. Diabetes Care. 2015 Jun;38(6):997-1007. doi: 10.2337/dc15-0349. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Simulated C-peptide AUC	Endogenous insulin secretion as measured as stimulated C-peptide section Area Under the Curve (AUC) during a 4 hour mixed meal tolerance test (MMTT)	1 Year Visit
Primary	Proportion of regulatory T cells	As measured from blood samples	1 Year Visit
Secondary	Hemoglobin A1c (HbA1c) levels	Measure of glycemic control as evaluated by HbA1c levels from blood samples	Up to 18 months
Secondary	Insulin dose	Measure of glycemic control as evaluated by insulin dose	Up to 18 months
Secondary	Mean daily plasma glucose levels	Measure of glycemic control as evaluated by the mean daily plasma glucose levels from blood samples	Up to 18 months
Secondary	Incidence of immune response adverse events	Incidence of immune response adverse events as assessed by treating physician	Up to 18 months