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A Phase I/IIa open label single ascending dose study to assess safety and tolerability of regulatory T cells to promote discontinuation of tacrolimus monotherapy in liver transplant recipients - LiveTreg

Status
Recruiting
Phases
Phase 1Phase 2
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2023-508261-32-00
Acronym
LiveTreg
Enrollment
27
Registered
2025-02-06
Start date
2025-07-21
Completion date
Unknown
Last updated
2025-08-14

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Solid organ transplantation (Liver)

Brief summary

Primary safety endpoint 1: Acute toxicity associated with infusion of Treg02 will be assessed by evidence of: (a) pulmonary complications, (b) immunological reactions resulting in anaphylactic reactions, immediate cardiovascular compromise, or other acute organ failure, (c) Treg therapy associated biochemical perturbation (significant deviations in biomarker data) as assessed by the immunological impact of the infused cells or apoptosis of Tregs and release of cellular contents, Primary safety endpoint 2: Over-suppression of the immune system by assessing evidence of: (a) major and/or opportunistic infections, especially increased frequency of CMV, EBV and HBV, HCV reactivation and/or disease, (b) (early) development of neoplasia, (c) relevant anomalies in laboratory analysis unrelated to the transplanted liver functions, Primary clinical endpoint: Incidence of acute and/or chronic rejection and the prevalence of AEs. The principal measure of immunomodulation is biopsy-proven acute rejection (BPAR) within 14 months following Treg transfer. Histopathological grading of biopsy material will be assessed by the established Banff criteria.

Detailed description

Secondary indices of efficacy 1: Prevention of acute rejection: (a) Time to acute rejection episode, (b) Severity of acute rejection episodes based on response to treatment and histological scoring, (c) The level of total immunosuppression at the final trial visit, Secondary indices of efficacy 2: Incidence of patients treated for subclinical acute rejection based on histopathological findings, Secondary indices of efficacy 3: Prevention of chronic graft dysfunction (chronic rejection) will be assessed by clinically impaired levels of liver enzymes) and histopathological (Banff staging) criteria measures, Secondary indices of efficacy 4: Reduced incidence of adverse events/rejections following tapering of immunosuppression (e.g. cardiovascular complications, drug toxicity, etc.), Biomarker panel: Measure functional and molecular indices reflecting the immune response as well as treatment safety and efficacy of Tregs by a validated set of biomarkers; as detailed in the Clinical trial protocol., Assess health-related quality of life by the SF-12 questionnaire

Interventions

Sponsors

Charite Universitaetsmedizin Berlin KöR
Lead SponsorOTHER

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Design outcomes

Primary

MeasureTime frame
Primary safety endpoint 1: Acute toxicity associated with infusion of Treg02 will be assessed by evidence of: (a) pulmonary complications, (b) immunological reactions resulting in anaphylactic reactions, immediate cardiovascular compromise, or other acute organ failure, (c) Treg therapy associated biochemical perturbation (significant deviations in biomarker data) as assessed by the immunological impact of the infused cells or apoptosis of Tregs and release of cellular contents, Primary safety endpoint 2: Over-suppression of the immune system by assessing evidence of: (a) major and/or opportunistic infections, especially increased frequency of CMV, EBV and HBV, HCV reactivation and/or disease, (b) (early) development of neoplasia, (c) relevant anomalies in laboratory analysis unrelated to the transplanted liver functions, Primary clinical endpoint: Incidence of acute and/or chronic rejection and the prevalence of AEs. The principal measure of immunomodulation is biopsy-proven acute rej

Secondary

MeasureTime frame
Secondary indices of efficacy 1: Prevention of acute rejection: (a) Time to acute rejection episode, (b) Severity of acute rejection episodes based on response to treatment and histological scoring, (c) The level of total immunosuppression at the final trial visit, Secondary indices of efficacy 2: Incidence of patients treated for subclinical acute rejection based on histopathological findings, Secondary indices of efficacy 3: Prevention of chronic graft dysfunction (chronic rejection) will be assessed by clinically impaired levels of liver enzymes) and histopathological (Banff staging) criteria measures, Secondary indices of efficacy 4: Reduced incidence of adverse events/rejections following tapering of immunosuppression (e.g. cardiovascular complications, drug toxicity, etc.), Biomarker panel: Measure functional and molecular indices reflecting the immune response as well as treatment safety and efficacy of Tregs by a validated set of biomarkers; as detailed in the Clinical trial pr

Countries

Germany

Outcome results

None listed

Source: EU CTIS · Data processed: Feb 4, 2026