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NCT Number: NCT05153070

Ciclosporin Followed by Low-dose IL-2 in Patients With Recently Diagnosed Type 1 Diabetes

Type 1 diabetes (T1D) is caused by the destruction of insulin-producing cells by effector T cells (Teffs), due to a deficiency of regulatory T cells (Tregs).

Ciclosporin effectively blocks the Teffs and controls diabetes, but cannot be considered as a long-term treatment. Low-dose interleukin-2 (ld IL-2) activates and expands Tregs in humans.

Hence, Ld IL-2 in patients in whom the autoimmune process was blocked early by a short treatment (2 months) of cyclosporine should restore immune homeostasis and maintain some insulin production over the long term.

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Key information

Conditions

Type 1 Diabetes Autoimmune Diseases Diabetes Mellitus Diabetes Mellitus, Type 1 Endocrine System Diseases Glucose Metabolism Disorders Immune System Diseases Metabolic Diseases Nutritional and Metabolic Diseases

Age range

16 year–45 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 2

Primary location

Lorenzon Roberta

Paris, 75013, France

Location status: Recruiting

Location contact

Roberta Lorenzon, MD

CONTACT

[email protected]

About this study

Primary Objective :

Tregs' response profile, after 4 administrations of 1MIU/day of IL-2 (Day 63-66) in patients with recently diagnosed type 1 diabetes who have been treated with ciclosporin for 2 months.

Primary assessment criterion:

Change in Tregs values at D67 compared to D63 (post-ciclosporin values)

Secondary objectives and secondary assessment criteria:

  • Change in residual insulin secretion
  • AUC plasma C-peptide concentration after a mixed meal tolerance test at Month 6 (Day 179), Month 12 (Day 361) and after treatment discontinuation at Month 18 (Day 536) and Month 24 (Day 719) compared to baseline;
  • Insulin requirement, HbA1c dosage and IDAA1c score at Month 3 (Day 88), Month 6 (Day 179), Month 9 (Day 270), Month 12 (Day 361) and after treatment discontinuation at Month 18 (Day 536) and Month 24 (Day 719) compared to baseline
  • Change in Tregs values at Month 3 (Day 88), Month 6 (Day 179), Month 9 (Day 270), Month 12 (Day 361) and after treatment discontinuation at Month 18 (Day 536) and Month 24 (Day 719) compared to baseline and post-ciclosporin values (Day 63)
  • Ciclosporin and ILT-101/placebo compliance
  • Tolerance

Experimental design:

This is a monocentric, randomized, placebo controlled, double-blind trial in parallel-groups, evaluating a treatment by cyclosporine 7mg/kg/day during 2 months followed by ILT-101/placebo, 1 MIU daily for 5 days and 1 MIU every week, during 10 months.

Population involved:

Male or female, aged between 16 and 35 years, with recent diagnosis of type 1 diabetes (< 3 months).

Number of subjects: 24 Inclusion period: 12 months Duration of patient participation: 24 months (treatment period: 12 months, follow-up period: 12months) Total duration of the study: 37 months

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • • Age at inclusion between ≥ 16 years old (Tanner 5 pubertal stage) and ≤ 45 years old
  • Type 1 diabetes according to ADA criteria, with at least 1 positive autoantibody among the following: anti-islet, anti-GAD, anti-IA2, anti-ZnT8 and anti-insulin.
  • Diagnosis ≤ 3 months
  • No acid ketosis
  • No weight loss > 10% OR with fasting C-peptide ≥ 0.1 nmol/L (after a period of ≥ 15 days following the initiation of insulin therapy
  • Absence of clinically significant biological abnormalities on hematological, biochemical, hepatic, renal and thyroid tests.
  • No documented history of heart disease, no family history of sudden death, AND normal ECG.
  • Effective contraception in men and women of childbearing potential > 2 weeks prior to first administration of the investigational drug and throughout the treatment period (if sexually active). Specifically for women of childbearing age and sexually active, they must use an effective contraceptive method (Pearl Index < 1). The following methods are acceptable: oral hormonal contraceptives, injectable, or implanted (with the exception of oral minipills: i.e. low doses of gestagens which are not acceptable (lynestrenol and norestisteron), intrauterine contraceptives (e.g. progestin-release systems)),
  • Free, informed and written consent, signed by the patient and the investigator, prior to any examination required by the trial.

If the patient is a minor, the signatures of both parents and of the child will be collected (or the legal representative if only one parent is alive).

Exclusion criteria

  • Known contraindications to IL2 treatment:
  • Hypersensitivity to the active substance or to one of the excipients.
  • Signs of active infection requiring antibiotics
  • Documented history of clinical autoimmune disease
  • Oxygen saturation ≤ 90%
  • Existence of a serious dysfunction in a vital organ
  • History of organ allograft,
  • Known contraindications to treatment with cyclosporine
  • Presence of unauthorized treatment, i.e. cytotoxic drugs, products known for their impact on blood glucose levels or for their interactions with the treatments under trial
  • Patients who have received anti-diabetic treatment other than insulin for more than 3 consecutive months.
  • Anti-thyroperoxidase positive and abnormal TSH and T4 at inclusion
  • Anti-transglutaminase positive at inclusion
  • EBV viral load > 2000 IU/ml
  • CMV viral load > 400 IU/ml
  • HBV, HCV or HIV infection
  • Lymphopenia ≤ 1000/ mm3
  • Presence or history of cancer that has been cured for less than five years, except in situ cervical or basal cell carcinoma in early stage management,
  • Participation in other intervention research involving humans < 3 months,
  • Pregnant or breastfeeding women
  • Lack of social security affiliation (as a beneficiary or assignee)
  • Vaccination with live attenuated virus during the last 4 weeks before the start of the experimental treatment and during the entire treatment phase.
  • Patient with active SARS-CoV-2 infection
  • Patient with chronic respiratory disease
  • Subject under legal protection (such as tutorship, curatorship, or judicial safeguard)
  • Subject hospitalized without consent, unable to express consent or deprived of liberty

Treatment and study plan

Cyclosporin

Drug
  • Ciclosporin: 5mg/kg, twice a day, oral, between Day 1 and Day 60

ILT101

Drug
  • ILT-101: 1MIU/day in a volume of 1 ml; subcutaneous injection every day during 5 consecutive days and then every week between Day 63 and Day 354.

Placebo

Drug
  • Placebo with an identical formulation and regimen of injections i.e. Subcutaneous injection every day (5 consecutive days) then then every week between Day 63 and Day 354.

Primary outcomes

  1. Treg variation

    Time frame: From Day 63 to Day 67

    Change in Tregs values at Day 67 compared to Day 63 (post-ciclosporin value)

Secondary outcomes

  1. Change in Area under curve (AUC (T0-T120) of serum C-peptide at month 6

    Time frame: up to month 6

    Change in Area under curve (AUC (T0-T120) of serum C-peptide after mixed-meal tolerance test compared to baseline

    • Variation in HbA1c value (in %) 3. Variation in IDAA1c score (IDAA1c score = HbA1c (in %) + [4 × insulin dose (in international units per kilogram per 24 h)].
    • Change in Insulin requirement (insulin dose in international units per kilogram per 24 h 5. Change in Tregs values (in %/CD4+) at month 3, month 6, month 9, month 12 and after treatment interruption at month 18 and month 24 compared to baseline and post-cyclosporin values (Day 63)

  2. Change in Area under curve (AUC (T0-T120) of serum C-peptide at month 12

    Time frame: up to month 12

    Change in Area under curve (AUC (T0-T120) of serum C-peptide after mixed-meal tolerance test compared to baseline

    • Variation in HbA1c value (in %) 3. Variation in IDAA1c score (IDAA1c score = HbA1c (in %) + [4 × insulin dose (in international units per kilogram per 24 h)].
    • Change in Insulin requirement (insulin dose in international units per kilogram per 24 h 5. Change in Tregs values (in %/CD4+) at month 3, month 6, month 9, month 12 and after treatment interruption at month 18 and month 24 compared to baseline and post-cyclosporin values (Day 63)

  3. Change in Area under curve (AUC (T0-T120) of serum C-peptide at month 24

    Time frame: up to month 24

    Change in Area under curve (AUC (T0-T120) of serum C-peptide after mixed-meal tolerance test compared to baseline

    • Variation in HbA1c value (in %) 3. Variation in IDAA1c score (IDAA1c score = HbA1c (in %) + [4 × insulin dose (in international units per kilogram per 24 h)].
    • Change in Insulin requirement (insulin dose in international units per kilogram per 24 h 5. Change in Tregs values (in %/CD4+) at month 3, month 6, month 9, month 12 and after treatment interruption at month 18 and month 24 compared to baseline and post-cyclosporin values (Day 63)

  4. Variation in HbA1c value (in %) during the treatment period and during the 1-year follow-up period compared to Baseline at day 63,

    Time frame: up to day 63

    Variation in HbA1c value (in %) during the treatment period and during the 1-year follow-up period compared to baseline

  5. Variation in HbA1c value (in %) during the treatment period and during the 1-year follow-up period compared to Baseline at month 3

    Time frame: up to month 3

    Variation in HbA1c value (in %) during the treatment period and during the 1-year follow-up period compared to baseline

  6. Variation in HbA1c value (in %) during the treatment period and during the 1-year follow-up period compared to Baseline at month 6

    Time frame: up to month 6

    Variation in HbA1c value (in %) during the treatment period and during the 1-year follow-up period compared to baseline

  7. Variation in HbA1c value (in %) during the treatment period and during the 1-year follow-up period compared to Baseline at month 9

    Time frame: up to month 9

    Variation in HbA1c value (in %) during the treatment period and during the 1-year follow-up period compared to baseline

  8. Variation in HbA1c value (in %) during the treatment period and during the 1-year follow-up period compared to Baseline at month 12

    Time frame: up to month 12

    Variation in HbA1c value (in %) during the treatment period and during the 1-year follow-up period compared to baseline

  9. Variation in HbA1c value (in %) during the treatment period and during the 1-year follow-up period compared to Baseline at month 18

    Time frame: up to month 18

    Variation in HbA1c value (in %) during the treatment period and during the 1-year follow-up period compared to baseline

  10. Variation in HbA1c value (in %) during the treatment period and during the 1-year follow-up period compared to Baseline at month 24

    Time frame: up to month 24

    Variation in HbA1c value (in %) during the treatment period and during the 1-year follow-up period compared to baseline

  11. Variation in IDAA1c scoreduring the treatment period and during the 1 year follow-up period at day 63

    Time frame: up to day 63

    Variation in IDAA1c score (IDAA1c score = HbA1c (in %) + [4 × insulin dose (in international units per kilogram per 24 h)] during the treatment period and during the 1 year follow-up period compared to baseline

  12. Variation in IDAA1c scoreduring the treatment period and during the 1 year follow-up period up to month 3

    Time frame: up to month 3

    Variation in IDAA1c score (IDAA1c score = HbA1c (in %) + [4 × insulin dose (in international units per kilogram per 24 h)] during the treatment period and during the 1 year follow-up period compared to baseline

  13. Variation in IDAA1c scoreduring the treatment period and during the 1 year follow-up period at month 6

    Time frame: up to month 6

    Variation in IDAA1c score (IDAA1c score = HbA1c (in %) + [4 × insulin dose (in international units per kilogram per 24 h)] during the treatment period and during the 1 year follow-up period compared to baseline

  14. Variation in IDAA1c scoreduring the treatment period and during the 1 year follow-up period at month 9

    Time frame: up to month 9

    Variation in IDAA1c score (IDAA1c score = HbA1c (in %) + [4 × insulin dose (in international units per kilogram per 24 h)] during the treatment period and during the 1 year follow-up period compared to baseline

  15. Variation in IDAA1c scoreduring the treatment period and during the 1 year follow-up period at month 12

    Time frame: up to month 12

    Variation in IDAA1c score (IDAA1c score = HbA1c (in %) + [4 × insulin dose (in international units per kilogram per 24 h)] during the treatment period and during the 1 year follow-up period compared to baseline

  16. Variation in IDAA1c scoreduring the treatment period and during the 1 year follow-up period at day month 18

    Time frame: up to month 18

    Variation in IDAA1c score (IDAA1c score = HbA1c (in %) + [4 × insulin dose (in international units per kilogram per 24 h)] during the treatment period and during the 1 year follow-up period compared to baseline

  17. Variation in IDAA1c scoreduring the treatment period and during the 1 year follow-up period at month 24

    Time frame: up to month 24

    Variation in IDAA1c score (IDAA1c score = HbA1c (in %) + [4 × insulin dose (in international units per kilogram per 24 h)] during the treatment period and during the 1 year follow-up period compared to baseline

  18. Change in Insulin requirement (insulin dose in international units per kilogram per 24 h) during the treatment period and during the 1 year follow-up period at day 30

    Time frame: up to day 30

    Change in Insulin requirement (insulin dose in international units per kilogram per 24 h) during the treatment period and during the 1 year follow-up period compared to baseline

  19. Change in Insulin requirement (insulin dose in international units per kilogram per 24 h) during the treatment period and during the 1 year follow-up period at day 63

    Time frame: up to day 63

    Change in Insulin requirement (insulin dose in international units per kilogram per 24 h) during the treatment period and during the 1 year follow-up period compared to baseline

  20. Change in Insulin requirement (insulin dose in international units per kilogram per 24 h) during the treatment period and during the 1 year follow-up period at month 3

    Time frame: up to month 3

    Change in Insulin requirement (insulin dose in international units per kilogram per 24 h) during the treatment period and during the 1 year follow-up period compared to baseline

  21. Change in Insulin requirement (insulin dose in international units per kilogram per 24 h) during the treatment period and during the 1 year follow-up period at month 6

    Time frame: up to month 6

    Change in Insulin requirement (insulin dose in international units per kilogram per 24 h) during the treatment period and during the 1 year follow-up period compared to baseline

  22. Change in Insulin requirement (insulin dose in international units per kilogram per 24 h) during the treatment period and during the 1 year follow-up period at month 9

    Time frame: up to month 9

    Change in Insulin requirement (insulin dose in international units per kilogram per 24 h) during the treatment period and during the 1 year follow-up period compared to baseline

  23. Change in Insulin requirement (insulin dose in international units per kilogram per 24 h) during the treatment period and during the 1 year follow-up period at month 12

    Time frame: up to month 12

    Change in Insulin requirement (insulin dose in international units per kilogram per 24 h) during the treatment period and during the 1 year follow-up period compared to baseline

  24. Change in Insulin requirement (insulin dose in international units per kilogram per 24 h) during the treatment period and during the 1 year follow-up period at month 18

    Time frame: up to month 18

    Change in Insulin requirement (insulin dose in international units per kilogram per 24 h) during the treatment period and during the 1 year follow-up period compared to baseline

  25. Change in Insulin requirement (insulin dose in international units per kilogram per 24 h) during the treatment period and during the 1 year follow-up period at month 24

    Time frame: up to month 24

    Change in Insulin requirement (insulin dose in international units per kilogram per 24 h) during the treatment period and during the 1 year follow-up period compared to baseline

  26. Change in Tregs values (in %/CD4+) after treatment interruption and post-cyclosporin values at day 30

    Time frame: up to day 30

    Change in Tregs values (in %/CD4+) after treatment interruption compared to baseline and post-cyclosporin values

  27. Change in Tregs values (in %/CD4+) after treatment interruption and post-cyclosporin values at day 63

    Time frame: up to day 63

    Change in Tregs values (in %/CD4+) after treatment interruption compared to baseline and post-cyclosporin values

  28. Change in Tregs values (in %/CD4+) after treatment interruption and post-cyclosporin values at month 3

    Time frame: up to month 3

    Change in Tregs values (in %/CD4+) after treatment interruption compared to baseline and post-cyclosporin values

  29. Change in Tregs values (in %/CD4+) after treatment interruption and post-cyclosporin values at month 6

    Time frame: up to month 6

    Change in Tregs values (in %/CD4+) after treatment interruption compared to baseline and post-cyclosporin values

  30. Change in Tregs values (in %/CD4+) after treatment interruption and post-cyclosporin values at month 9

    Time frame: up to month 9

    Change in Tregs values (in %/CD4+) after treatment interruption compared to baseline and post-cyclosporin values

  31. Change in Tregs values (in %/CD4+) after treatment interruption and post-cyclosporin values at month 12

    Time frame: up to month 12

    Change in Tregs values (in %/CD4+) after treatment interruption compared to baseline and post-cyclosporin values

  32. Change in Tregs values (in %/CD4+) after treatment interruption and post-cyclosporin values at month 18

    Time frame: up to month 18

    Change in Tregs values (in %/CD4+) after treatment interruption compared to baseline and post-cyclosporin values

  33. Change in Tregs values (in %/CD4+) after treatment interruption and post-cyclosporin values at month 24

    Time frame: up to month 24

    Change in Tregs values (in %/CD4+) after treatment interruption compared to baseline and post-cyclosporin values

  34. incidence of adverse events at day 30

    Time frame: up to day 30

    incidence of adverse events throughout the study (according to NCI-CTC AE classification) to the Baseline to month 24

  35. incidence of adverse events at day 63

    Time frame: up to day 63

    incidence of adverse events throughout the study (according to NCI-CTC AE classification) to the Baseline to month 24

  36. incidence of adverse events at month 3

    Time frame: up to month 3

    incidence of adverse events throughout the study (according to NCI-CTC AE classification) to the Baseline to month 24

  37. incidence of adverse events at month 6

    Time frame: up to month 6

    incidence of adverse events throughout the study (according to NCI-CTC AE classification) to the Baseline to month 24

  38. incidence of adverse events at month 9

    Time frame: up to month 9

    incidence of adverse events throughout the study (according to NCI-CTC AE classification) to the Baseline to month 24

  39. incidence of adverse events at month 12

    Time frame: up to month 12

    incidence of adverse events throughout the study (according to NCI-CTC AE classification) to the Baseline to month 24

  40. incidence of adverse events at month 18

    Time frame: up to month 18

    incidence of adverse events throughout the study (according to NCI-CTC AE classification) to the Baseline to month 24

  41. incidence of adverse events at month 24

    Time frame: up to month 24

    incidence of adverse events throughout the study (according to NCI-CTC AE classification) to the Baseline to month 24

Study contacts

Contact information is provided by the study sponsor or research team.

David Klatzmann, MD, Ph.D

CONTACT

[email protected]

01 42 17 74 61 ext. +33

Roberta Lorenzon, MD

CONTACT

[email protected]

01 42 17 65 16 ext. +33

Sponsors and collaborators

Lead sponsor

Assistance Publique - Hôpitaux de Paris

Other

Collaborators

  • Iltoo Pharma

Registry information

Official study title

Clinical and Biological Responses to Repeated Administration of Low-dose Interleukin-2 in Patients With Type 1 Diabetes and a Residual Insulin Secretion

Acronym: DF-IL2-REP

Important dates

Study start
2022
Primary completion
2026
Study completion
2028
First posted
Dec 10, 2021
Registry last updated
Jun 27, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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