A 12-Month, Randomized, Controlled, Open-Label, Dose Escalation Study Evaluating Safety, Tolerability, Pharmacokinetics (PK) and Pharmacodynamics (PD) of an Anti-CD2 Monoclonal Antibody, TCD601 (Siplizumab) Compared to Anti-thymocyte Globulin (rATG), as Induction Therapy in de Novo Renal Transplant Recipients
| Registry | NCT06365437 |
| Status | Terminated - After enrolment was complete, and sufficient data was collected to fully characterize the highest dose cohort, study follow up was terminated by the sponsor for non-safety related reasons. |
| Phase | Phase 2 |
| Study type | Interventional; randomized, sequential, masking: none, basic science |
| Enrollment | 33 (Actual) |
| Sponsor | ITB-Med LLC (Industry) |
| Conditions | Kidney Transplantation |
| Interventions | TCD601, Tacrolimus (TAC), Corticosteroids (CS), Mycophenolate Mofetil (MMF), ATG (Biological, drug) |
| Dates | start 2021-06-06, primary completion 2024-12-11, completion 2024-12-11, first posted 2024-04-15, last updated 2026-03-12 |
| Locations | 7 sites in Austria, Spain, Sweden |
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-Summary
The purpose of this study is to investigate the safety, tolerability, pharmacokinetics and pharmacodynamics of escalating doses of TCD601 when compared to rATG in de novo renal transplant patients.
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+Arms and interventions
| Arm | Type | Interventions | Description |
|---|
| Arm 1 | Experimental | Biological: TCD601; Drug: Tacrolimus (TAC); Drug: Corticosteroids (CS); Drug: Mycophenolate Mofetil (MMF) | TCD601 0.2 mg/kg administered with the contemporary standard of care (SoC) consisting of concentration-controlled tacrolimus (TAC) combined with mycophenolate mofetil (MMF) and corticosteroids (CS). |
| Arm 2 | Experimental | Biological: TCD601; Drug: Tacrolimus (TAC); Drug: Corticosteroids (CS); Drug: Mycophenolate Mofetil (MMF) | TCD601 0.6 mg/kg administered with the contemporary standard of care (SoC) consisting of concentration-controlled tacrolimus (TAC) combined with mycophenolate mofetil (MMF) and corticosteroids (CS). |
| Arm 3 | Experimental | Biological: TCD601; Drug: Tacrolimus (TAC); Drug: Corticosteroids (CS); Drug: Mycophenolate Mofetil (MMF) | TCD601 1.7 mg/kg administered with the contemporary standard of care (SoC) consisting of concentration-controlled tacrolimus (TAC) combined with mycophenolate mofetil (MMF) and corticosteroids (CS). |
| Arm 4 | Experimental | Biological: TCD601; Drug: Tacrolimus (TAC); Drug: Corticosteroids (CS); Drug: Mycophenolate Mofetil (MMF) | TCD601 5.0 mg/kg administered with the contemporary standard of care (SoC) consisting of concentration-controlled tacrolimus (TAC) combined with mycophenolate mofetil (MMF) and corticosteroids (CS). |
| Arm 5 | Active comparator | Drug: Tacrolimus (TAC); Drug: Corticosteroids (CS); Drug: Mycophenolate Mofetil (MMF); Drug: ATG | ATG 1.5 mg/kg administered with the contemporary standard of care (SoC) consisting of concentration-controlled tacrolimus (TAC) combined with mycophenolate mofetil (MMF) and corticosteroids (CS). |
- TCD601 (Biological), also known as Siplizumab: Investigational Product
- Tacrolimus (TAC) (Drug): Standard of Care Concomitant Immunosuppression
- Corticosteroids (CS) (Drug): Standard of Care Concomitant Immunosuppression
- Mycophenolate Mofetil (MMF) (Drug): Standard of Care Concomitant Immunosuppression
- ATG (Drug): Standard of Care induction therapy in solid organ transplantation
+Outcome measures
Primary outcomes
- Number of Participants With Treatment-related Adverse Events as Assessed by CTCAE v5.0. [12 months]
- Measure Peak TCD601 Plasma Concentration (Cmax) Over Time. [12 months]: The maximum (peak) observed plasma, blood, serum, or other body fluid drug concentration after single dose administration.
- Measure the Area Under the TCD601 Plasma Concentration Versus Time Curve (AUC). [12 months]: The AUC from time zero to the last measurable concentration sampling time.
Secondary outcomes
- The Incidence of Allograft Rejection at 12 Months Post-Transplant [12 months]
- To Assess Renal Function Over Time [12 months]
+Eligibility
Sex: All, ages: 18 Years to 70 Years
Inclusion Criteria:
* Able to understand the study requirements and provide written informed consent before and study assessment is performed.
* Male or female patients ≥ 18 to 70 years of age.
* Recipients of a de novo renal allograft from a heart-beating deceased, living unrelated, or non-HLA identical living related donor.
* Recipients of a kidney with a cold ischemia time (CIT) less than 30 hours.
Exclusion Criteria:
* Multiple-organ transplant recipients
* Subjects who have received a kidney allograft previously
* Recipient of a kidney from an HLA identical living related donor
* Recipient of a kidney from a donor after cardiac death
* Subjects at high immunological risk for rejection
+Posted results
Participant flow
| Milestone | Arm 1 | Arm 2 | Arm 3 | Arm 4 | Arm 5 |
|---|
| Started | 6 | 5 | 8 | 8 | 5 |
| Completed | 5 | 4 | 7 | 0 | 3 |
| Not completed | 1 | 1 | 1 | 8 | 2 |
Outcome results
- Number of Participants With Treatment-related Adverse Events as Assessed by CTCAE v5.0. (Primary), Count of participants, Participants: Arm 1 6; Arm 2 5; Arm 3 8; Arm 4 8; Arm 5 5
- Measure Peak TCD601 Plasma Concentration (Cmax) Over Time. (Primary), Mean, ug/mL: Arm 1 4.3 +/- 0.578; Arm 2 12.8 +/- 1.96; Arm 3 50.6 +/- 9.79; Arm 4 135 +/- 11.8
- Measure the Area Under the TCD601 Plasma Concentration Versus Time Curve (AUC). (Primary), Mean, ug/mLxday: Arm 1 26.2 +/- 4.67; Arm 2 95.4 +/- 29.3; Arm 3 627 +/- 249; Arm 4 1910 +/- 389
- The Incidence of Allograft Rejection at 12 Months Post-Transplant (Secondary), Count of participants, Participants: Arm 1 0; Arm 2 0; Arm 3 1; Arm 4 0; Arm 5 0
- To Assess Renal Function Over Time (Secondary), Mean, mL/min/1.73m^2: Arm 1 32.99 +/- 15.671; Arm 2 61.8 +/- 20.521; Arm 3 51.85 +/- 12.011; Arm 4 59.45 +/- 12.676; Arm 5 51.17 +/- 8.376
Adverse events
Time frame: 12 Months
| Arm | Deaths | Serious adverse events | Other adverse events |
|---|
| Arm 1 | 0/6 (0.0%) | 3/6 (50.0%) | 6/6 (100.0%) |
| Arm 2 | 0/5 (0.0%) | 1/5 (20.0%) | 5/5 (100.0%) |
| Arm 3 | 0/8 (0.0%) | 4/8 (50.0%) | 8/8 (100.0%) |
| Arm 4 | 0/8 (0.0%) | 4/8 (50.0%) | 8/8 (100.0%) |
| Arm 5 | 0/5 (0.0%) | 0/5 (0.0%) | 5/5 (100.0%) |
Serious adverse events by term
| Term | Organ system | Arm 1 | Arm 2 | Arm 3 | Arm 4 | Arm 5 |
|---|
| Duodenal ulcer haemorrhage | Gastrointestinal disorders | 0/6 | 1/5 | 0/8 | 0/8 | 0/5 |
| Pancreatitis | Gastrointestinal disorders | 0/6 | 0/5 | 0/8 | 1/8 | 0/5 |
| Transplant Rejection | Immune system disorders | 0/6 | 0/5 | 0/8 | 1/8 | 0/5 |
| Appendicitis | Infections and infestations | 0/6 | 0/5 | 1/8 | 0/8 | 0/5 |
| Pulmonary Nocardiosis | Infections and infestations | 0/6 | 0/5 | 1/8 | 0/8 | 0/5 |
| Pneuomonia | Infections and infestations | 0/6 | 0/5 | 1/8 | 0/8 | 0/5 |
| Cerebral Nocardiosis | Infections and infestations | 0/6 | 0/5 | 1/8 | 0/8 | 0/5 |
| Delayed Graft Function | Injury, poisoning and procedural complications | 2/6 | 0/5 | 0/8 | 0/8 | 0/5 |
| Graft Thrombosis | Injury, poisoning and procedural complications | 0/6 | 0/5 | 1/8 | 0/8 | 0/5 |
| Infusion Related Reaction | Injury, poisoning and procedural complications | 0/6 | 0/5 | 0/8 | 1/8 | 0/5 |
| Renal Lymphocele | Injury, poisoning and procedural complications | 0/6 | 0/5 | 0/8 | 1/8 | 0/5 |
| Blood Creatinine Increased | Investigations | 0/6 | 0/5 | 0/8 | 1/8 | 0/5 |
| New onset Diabetes after transplantation | Metabolism and nutrition disorders | 1/6 | 0/5 | 0/8 | 0/8 | 0/5 |
| Renal Cell Carcinoma | Neoplasms benign, malignant and unspecified (incl cysts and polyps) | 0/6 | 0/5 | 1/8 | 0/8 | 0/5 |
| Focal Segmental Glomerulosclerosis | Renal and urinary disorders | 1/6 | 0/5 | 0/8 | 0/8 | 0/5 |
| Hydronephrosis | Renal and urinary disorders | 0/6 | 0/5 | 0/8 | 1/8 | 0/5 |
| Renal Impairment | Renal and urinary disorders | 1/6 | 0/5 | 0/8 | 0/8 | 0/5 |
| Deep vein thrombosis | Vascular disorders | 0/6 | 0/5 | 1/8 | 0/8 | 0/5 |
| Hypotension | Vascular disorders | 0/6 | 0/5 | 0/8 | 1/8 | 0/5 |
| Lymphocele | Vascular disorders | 1/6 | 0/5 | 0/8 | 0/8 | 0/5 |
Other adverse events by term
| Term | Organ system | Arm 1 | Arm 2 | Arm 3 | Arm 4 | Arm 5 |
|---|
| Anemia | Blood and lymphatic system disorders | 0/6 | 0/5 | 1/8 | 1/8 | 0/5 |
| Iron Deficiency Anemia | Blood and lymphatic system disorders | 0/6 | 0/5 | 1/8 | 0/8 | 0/5 |
| Leukopenia | Blood and lymphatic system disorders | 3/6 | 1/5 | 4/8 | 2/8 | 2/5 |
| Nephrogenic Anemia | Blood and lymphatic system disorders | 2/6 | 0/5 | 0/8 | 0/8 | 0/5 |
| Neutropenia | Blood and lymphatic system disorders | 0/6 | 0/5 | 0/8 | 1/8 | 0/5 |
| Polycythaemia | Blood and lymphatic system disorders | 0/6 | 0/5 | 0/8 | 0/8 | 1/5 |
| Palpitations | Cardiac disorders | 0/6 | 1/5 | 1/8 | 1/8 | 0/5 |
| Tachycardia | Cardiac disorders | 0/6 | 0/5 | 0/8 | 1/8 | 0/5 |
| Vertigo | Ear and labyrinth disorders | 1/6 | 0/5 | 1/8 | 0/8 | 0/5 |
| Hyperparathyroidism tertiary | Endocrine disorders | 0/6 | 0/5 | 1/8 | 0/8 | 0/5 |
| Hypothyroidism | Endocrine disorders | 1/6 | 0/5 | 0/8 | 0/8 | 0/5 |
| Dry eye | Eye disorders | 1/6 | 0/5 | 0/8 | 0/8 | 0/5 |
| Eye pain | Eye disorders | 0/6 | 0/5 | 0/8 | 0/8 | 1/5 |
| Retinal detachment | Eye disorders | 0/6 | 0/5 | 1/8 | 0/8 | 0/5 |
| scleral hemorrhage | Eye disorders | 1/6 | 0/5 | 0/8 | 0/8 | 0/5 |
| Abdominal discomfort | Gastrointestinal disorders | 0/6 | 0/5 | 1/8 | 0/8 | 0/5 |
| Abdominal pain | Gastrointestinal disorders | 2/6 | 0/5 | 1/8 | 1/8 | 0/5 |
| Abdominal pain upper | Gastrointestinal disorders | 0/6 | 0/5 | 0/8 | 1/8 | 0/5 |
| Aphthous ulcer | Gastrointestinal disorders | 0/6 | 0/5 | 0/8 | 1/8 | 0/5 |
| Constipation | Gastrointestinal disorders | 1/6 | 1/5 | 0/8 | 1/8 | 0/5 |
| Diarrhoea | Gastrointestinal disorders | 2/6 | 0/5 | 4/8 | 1/8 | 2/5 |
| Faeces hard | Gastrointestinal disorders | 1/6 | 0/5 | 0/8 | 0/8 | 0/5 |
| Haematochezia | Gastrointestinal disorders | 0/6 | 1/5 | 0/8 | 0/8 | 0/5 |
| Haemorrhoids | Gastrointestinal disorders | 1/6 | 0/5 | 0/8 | 0/8 | 0/5 |
| Intra-abdominal haematoma | Gastrointestinal disorders | 0/6 | 0/5 | 1/8 | 0/8 | 0/5 |
| Mouth ulceration | Gastrointestinal disorders | 0/6 | 0/5 | 1/8 | 0/8 | 0/5 |
| Nausea | Gastrointestinal disorders | 3/6 | 0/5 | 2/8 | 0/8 | 0/5 |
| Oesophagitis | Gastrointestinal disorders | 0/6 | 0/5 | 0/8 | 1/8 | 0/5 |
| Vomiting | Gastrointestinal disorders | 1/6 | 0/5 | 3/8 | 1/8 | 0/5 |
| chills | General disorders | 0/6 | 0/5 | 0/8 | 0/8 | 1/5 |
| Fatigue | General disorders | 2/6 | 0/5 | 0/8 | 0/8 | 0/5 |
| General physical health deterioration | General disorders | 1/6 | 0/5 | 0/8 | 0/8 | 0/5 |
| Malaise | General disorders | 1/6 | 0/5 | 0/8 | 0/8 | 0/5 |
| Oedema peripheral | General disorders | 3/6 | 0/5 | 2/8 | 0/8 | 0/5 |
| Pain | General disorders | 1/6 | 0/5 | 0/8 | 0/8 | 0/5 |
| Peripheral swelling | General disorders | 0/6 | 1/5 | 0/8 | 0/8 | 0/5 |
| Puncture site haematoma | General disorders | 0/6 | 0/5 | 0/8 | 0/8 | 1/5 |
| Pyrexia | General disorders | 2/6 | 1/5 | 1/8 | 1/8 | 1/5 |
| Hyperbilirubinaemia | Hepatobiliary disorders | 0/6 | 0/5 | 0/8 | 0/8 | 1/5 |
| Transplant Rejection | Immune system disorders | 1/6 | 0/5 | 1/8 | 0/8 | 0/5 |
| BK virus infection | Infections and infestations | 3/6 | 0/5 | 1/8 | 0/8 | 1/5 |
| Bacterial disease carrier | Infections and infestations | 0/6 | 0/5 | 1/8 | 0/8 | 0/5 |
| Bacteriuria | Infections and infestations | 1/6 | 0/5 | 0/8 | 0/8 | 0/5 |
| Bronchitis | Infections and infestations | 0/6 | 0/5 | 1/8 | 0/8 | 0/5 |
| COVID-19 | Infections and infestations | 1/6 | 1/5 | 1/8 | 0/8 | 0/5 |
| Conjunctivitis | Infections and infestations | 1/6 | 0/5 | 0/8 | 0/8 | 0/5 |
| Cytomegalovirus infection | Infections and infestations | 1/6 | 1/5 | 2/8 | 1/8 | 1/5 |
| Cytomegalovirus viraemia | Infections and infestations | 3/6 | 0/5 | 5/8 | 1/8 | 0/5 |
| Device related infection | Infections and infestations | 1/6 | 0/5 | 0/8 | 0/8 | 0/5 |
| Epstein-Barr viraemia | Infections and infestations | 0/6 | 1/5 | 0/8 | 0/8 | 0/5 |
| Epstein-Barr virus infection | Infections and infestations | 0/6 | 1/5 | 2/8 | 0/8 | 1/5 |
| Genital herpes | Infections and infestations | 0/6 | 1/5 | 0/8 | 0/8 | 0/5 |
| Lyme disease | Infections and infestations | 0/6 | 0/5 | 0/8 | 1/8 | 0/5 |
| Nasal herpes | Infections and infestations | 0/6 | 0/5 | 0/8 | 0/8 | 1/5 |
| Nasopharyngitis | Infections and infestations | 3/6 | 0/5 | 3/8 | 0/8 | 1/5 |
| Oral candidiasis | Infections and infestations | 1/6 | 0/5 | 0/8 | 0/8 | 0/5 |
| Oral fungal infection | Infections and infestations | 0/6 | 0/5 | 1/8 | 0/8 | 0/5 |
| Oral herpes | Infections and infestations | 2/6 | 0/5 | 0/8 | 0/8 | 1/5 |
| Polyomavirus viraemia | Infections and infestations | 4/6 | 0/5 | 1/8 | 1/8 | 1/5 |
| Postoperative wound infection | Infections and infestations | 0/6 | 0/5 | 1/8 | 0/8 | 0/5 |
113 more terms not shown.
+Locations (7)
| Facility | City | Country | Status |
|---|
| Innsbruck Medical University | Innsbruck | Austria | |
| University of Vienna | Vienna | Austria | |
| Hospital Clinic de Barcelona | Barcelona | Spain | |
| Hospital Universitari de Bellvitge | Barcelona | Spain | |
| Karolinska University Hospital | Stockholm, Huddinge | Sweden | |
| Sahlgrenska University Hospital | Gothenburg | Sweden | |
| Skåne University Hospital | Malmö | Sweden | |
+Study documents
+Investigators