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A Dose Escalation Study in de Novo Renal Transplantation

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

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04311632
Enrollment
13
Registered
2020-03-17
Start date
2021-05-26
Completion date
2023-10-03
Last updated
2025-02-27

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

Conditions

Kidney Transplantation

Brief 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.

Interventions

BIOLOGICALTCD601

Investigational Product

Standard of Care Concomitant Immunosuppression

Standard of Care Concomitant Immunosuppression

DRUGMycophenolate Mofetil (MMF)

Standard of Care Concomitant Immunosuppression

DRUGATG

Standard of Care induction therapy in solid organ transplantation

Sponsors

ITB-Med LLC
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
SEQUENTIAL
Primary purpose
BASIC_SCIENCE
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to 70 Years
Healthy volunteers
No

Inclusion criteria

Key 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. Key

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

Design outcomes

Primary

MeasureTime frameDescription
Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.12 months
Measure Peak Plasma Concentration (Cmax) Over Time.12 monthsThe maximum (peak) observed plasma, blood, serum, or other body fluid drug concentration after single dose administration.
Measure the Area Under the Plasma Concentration Versus Time Curve (AUC).12 monthsThe AUC from time zero to the last measurable concentration sampling time.

Secondary

MeasureTime frameDescription
The Incidence of Rejection at 12 Months Post-transplant.12 monthsThe incidence of treated biopsy-proven acute rejection (tBPAR) and antibody medication rejection (AMR) at 12 months post-transplant.
To Assess the Change in Renal Function Over Time.12 monthsEstimated glomerular filtration rate (eGFR) was calculated using the MDRD4 equation. Mean+-SD eGFR values are presented at 3, 6, and 12. and compared against baseline (1 Month post-transplant).

Countries

United States

Participant flow

Participants by arm

ArmCount
Arm 1
TCD601 (0.2mg/kg) administered with the standard of care (SoC) consisting of concentration-controlled tacrolimus (TAC) combined with mycophenolate mofetil (MMF) and corticosteroids (CS). TCD601: Investigational Product Tacrolimus (TAC): Standard of Care Concomitant Immunosuppression Corticosteroids (CS): Standard of Care Concomitant Immunosuppression Mycophenolate Mofetil (MMF): Standard of Care Concomitant Immunosuppression
2
Arm 2
TCD601 (0.6mg/kg) administered with the standard of care (SoC) consisting of concentration-controlled tacrolimus (TAC) combined with mycophenolate mofetil (MMF) and corticosteroids (CS). TCD601: Investigational Product Tacrolimus (TAC): Standard of Care Concomitant Immunosuppression Corticosteroids (CS): Standard of Care Concomitant Immunosuppression Mycophenolate Mofetil (MMF): Standard of Care Concomitant Immunosuppression
4
Arm 3
ATG administered with the standard of care (SoC) consisting of concentration-controlled tacrolimus (TAC) combined with mycophenolate mofetil (MMF) and corticosteroids (CS). ATG: Standard of Care induction therapy in solid organ transplantation Tacrolimus (TAC): Standard of Care Concomitant Immunosuppression Corticosteroids (CS): Standard of Care Concomitant Immunosuppression Mycophenolate Mofetil (MMF): Standard of Care Concomitant Immunosuppression
7
Total13

Withdrawals & dropouts

PeriodReasonFG000FG001FG002
Overall StudyWithdrawal by Subject001

Baseline characteristics

CharacteristicArm 2TotalArm 1Arm 3
Age, Continuous42 years
STANDARD_DEVIATION 10.8
45 years
STANDARD_DEVIATION 10.6
29 years
STANDARD_DEVIATION 5.7
51.3 years
STANDARD_DEVIATION 4.7
BMI30.5 kg/m^2
STANDARD_DEVIATION 2.9
29.0 kg/m^2
STANDARD_DEVIATION 5.3
22.1 kg/m^2
STANDARD_DEVIATION 6.6
30.6 kg/m^2
STANDARD_DEVIATION 4.6
Current Dialysis
Hemodialysis
2 Participants5 Participants0 Participants3 Participants
Current Dialysis
None
1 Participants5 Participants2 Participants2 Participants
Current Dialysis
Peritoneal Dialysis
1 Participants3 Participants0 Participants2 Participants
End Stage Disease Leading to Transplantation
Diabetes Mellitus
1 Participants4 Participants0 Participants3 Participants
End Stage Disease Leading to Transplantation
Glomerular Disease
0 Participants2 Participants1 Participants1 Participants
End Stage Disease Leading to Transplantation
Hypertension/ Nephrosclerosis
0 Participants2 Participants0 Participants2 Participants
End Stage Disease Leading to Transplantation
IgA Nephropathy
0 Participants1 Participants0 Participants1 Participants
End Stage Disease Leading to Transplantation
Other: Congenital Obstructive Uropathy
0 Participants1 Participants1 Participants0 Participants
End Stage Disease Leading to Transplantation
Polycystic Disease
3 Participants3 Participants0 Participants0 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
0 Participants1 Participants0 Participants1 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
4 Participants12 Participants2 Participants6 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants0 Participants
Height188.0 centimeters
STANDARD_DEVIATION 4.4
179.1 centimeters
STANDARD_DEVIATION 10.4
171.0 centimeters
STANDARD_DEVIATION 16.9
177.7 centimeters
STANDARD_DEVIATION 8.9
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Black or African American
1 Participants3 Participants0 Participants2 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
White
3 Participants10 Participants2 Participants5 Participants
Region of Enrollment
United States
4 participants13 participants2 participants7 participants
Sex: Female, Male
Female
0 Participants3 Participants1 Participants2 Participants
Sex: Female, Male
Male
4 Participants10 Participants1 Participants5 Participants
Viral Serology
Cytomegalovirus
Negative
2 Participants7 Participants1 Participants4 Participants
Viral Serology
Cytomegalovirus
Positive
2 Participants6 Participants1 Participants3 Participants
Viral Serology
Epstein-Barr Virus
Negative
0 Participants0 Participants0 Participants0 Participants
Viral Serology
Epstein-Barr Virus
Positive
4 Participants13 Participants2 Participants7 Participants
Viral Serology
Hepatitis B Surface Antigen
Negative
4 Participants13 Participants2 Participants7 Participants
Viral Serology
Hepatitis B Surface Antigen
Positive
0 Participants0 Participants0 Participants0 Participants
Viral Serology
Hepatitis C Virus Antibody
Negative
4 Participants13 Participants2 Participants7 Participants
Viral Serology
Hepatitis C Virus Antibody
Positive
0 Participants0 Participants0 Participants0 Participants
Viral Serology
Human Immunodeficiency Virus
Negative
4 Participants13 Participants2 Participants7 Participants
Viral Serology
Human Immunodeficiency Virus
Positive
0 Participants0 Participants0 Participants0 Participants
Weight115.5 kilograms
STANDARD_DEVIATION 16.5
97.9 kilograms
STANDARD_DEVIATION 24.8
66.8 kilograms
STANDARD_DEVIATION 32.4
96.8 kilograms
STANDARD_DEVIATION 19.7

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
deaths
Total, all-cause mortality
0 / 20 / 40 / 7
other
Total, other adverse events
2 / 24 / 47 / 7
serious
Total, serious adverse events
2 / 21 / 45 / 7

Outcome results

Primary

Measure Peak Plasma Concentration (Cmax) Over Time.

The maximum (peak) observed plasma, blood, serum, or other body fluid drug concentration after single dose administration.

Time frame: 12 months

ArmMeasureValue (MEAN)Dispersion
Arm 1Measure Peak Plasma Concentration (Cmax) Over Time.5.0 ug/mLStandard Deviation 0.2
Arm 2Measure Peak Plasma Concentration (Cmax) Over Time.17.5 ug/mLStandard Deviation 1.1
Primary

Measure the Area Under the Plasma Concentration Versus Time Curve (AUC).

The AUC from time zero to the last measurable concentration sampling time.

Time frame: 12 months

ArmMeasureValue (MEAN)Dispersion
Arm 1Measure the Area Under the Plasma Concentration Versus Time Curve (AUC).23.0 ug/mL*dayStandard Deviation 0.5
Arm 2Measure the Area Under the Plasma Concentration Versus Time Curve (AUC).162.0 ug/mL*dayStandard Deviation 53.4
Primary

Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.

Time frame: 12 months

ArmMeasureGroupCategoryValue (COUNT_OF_PARTICIPANTS)
Arm 1Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 InfectionYes2 Participants
Arm 1Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE leading to Study DiscontinuationNo2 Participants
Arm 1Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 SAE related to Study MedicationYes1 Participants
Arm 1Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE leading to Study Medication DiscontinuationNo2 Participants
Arm 1Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE leading to Dose AdjustmentYes0 Participants
Arm 1Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE Related to Study MedicationYes2 Participants
Arm 1Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE leading to Study Medication DiscontinuationYes0 Participants
Arm 1Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE leading to Dose AdjustmentNo2 Participants
Arm 1Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 SAEYes2 Participants
Arm 1Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE leading to Dose InterruptionNo2 Participants
Arm 1Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE leading to Dose InterruptionYes0 Participants
Arm 1Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 Serious InfectionNo1 Participants
Arm 1Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE Related to Study MedicationNo0 Participants
Arm 1Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 SAE related to Study MedicationNo1 Participants
Arm 1Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 Serious InfectionYes1 Participants
Arm 1Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 SAENo0 Participants
Arm 1Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAENo0 Participants
Arm 1Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 InfectionNo0 Participants
Arm 1Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE leading to Study DiscontinuationYes0 Participants
Arm 1Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAEYes2 Participants
Arm 2Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 Serious InfectionNo4 Participants
Arm 2Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 SAEYes1 Participants
Arm 2Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAEYes4 Participants
Arm 2Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAENo0 Participants
Arm 2Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE Related to Study MedicationYes3 Participants
Arm 2Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE Related to Study MedicationNo1 Participants
Arm 2Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 SAENo3 Participants
Arm 2Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE leading to Study DiscontinuationYes0 Participants
Arm 2Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE leading to Study DiscontinuationNo4 Participants
Arm 2Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE leading to Dose AdjustmentYes0 Participants
Arm 2Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE leading to Dose AdjustmentNo4 Participants
Arm 2Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE leading to Dose InterruptionYes0 Participants
Arm 2Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE leading to Dose InterruptionNo4 Participants
Arm 2Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE leading to Study Medication DiscontinuationYes0 Participants
Arm 2Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE leading to Study Medication DiscontinuationNo4 Participants
Arm 2Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 InfectionYes3 Participants
Arm 2Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 InfectionNo1 Participants
Arm 2Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 Serious InfectionYes0 Participants
Arm 2Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 SAE related to Study MedicationYes0 Participants
Arm 2Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 SAE related to Study MedicationNo4 Participants
Arm 3Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAENo0 Participants
Arm 3Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE leading to Study Medication DiscontinuationNo7 Participants
Arm 3Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE leading to Study DiscontinuationYes0 Participants
Arm 3Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 SAE related to Study MedicationNo7 Participants
Arm 3Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 InfectionYes6 Participants
Arm 3Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 SAENo2 Participants
Arm 3Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 SAE related to Study MedicationYes0 Participants
Arm 3Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 InfectionNo1 Participants
Arm 3Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE Related to Study MedicationNo3 Participants
Arm 3Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAEYes7 Participants
Arm 3Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 Serious InfectionYes1 Participants
Arm 3Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE Related to Study MedicationYes4 Participants
Arm 3Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE leading to Dose InterruptionYes1 Participants
Arm 3Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE leading to Dose AdjustmentNo7 Participants
Arm 3Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 SAEYes5 Participants
Arm 3Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE leading to Dose InterruptionNo6 Participants
Arm 3Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE leading to Dose AdjustmentYes0 Participants
Arm 3Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 Serious InfectionNo6 Participants
Arm 3Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE leading to Study Medication DiscontinuationYes0 Participants
Arm 3Number of Participants With Treatment-emergent Adverse Events as Assessed by CTCAE v5.0.At least 1 TEAE leading to Study DiscontinuationNo7 Participants
Secondary

The Incidence of Rejection at 12 Months Post-transplant.

The incidence of treated biopsy-proven acute rejection (tBPAR) and antibody medication rejection (AMR) at 12 months post-transplant.

Time frame: 12 months

ArmMeasureGroupCategoryValue (COUNT_OF_PARTICIPANTS)
Arm 1The Incidence of Rejection at 12 Months Post-transplant.AMRYes0 Participants
Arm 1The Incidence of Rejection at 12 Months Post-transplant.tBPARYes1 Participants
Arm 1The Incidence of Rejection at 12 Months Post-transplant.AMRNo2 Participants
Arm 1The Incidence of Rejection at 12 Months Post-transplant.tBPARNo1 Participants
Arm 2The Incidence of Rejection at 12 Months Post-transplant.AMRYes0 Participants
Arm 2The Incidence of Rejection at 12 Months Post-transplant.tBPARNo4 Participants
Arm 2The Incidence of Rejection at 12 Months Post-transplant.tBPARYes0 Participants
Arm 2The Incidence of Rejection at 12 Months Post-transplant.AMRNo4 Participants
Arm 3The Incidence of Rejection at 12 Months Post-transplant.tBPARNo6 Participants
Arm 3The Incidence of Rejection at 12 Months Post-transplant.tBPARYes1 Participants
Arm 3The Incidence of Rejection at 12 Months Post-transplant.AMRNo7 Participants
Arm 3The Incidence of Rejection at 12 Months Post-transplant.AMRYes0 Participants
Secondary

To Assess the Change in Renal Function Over Time.

Estimated glomerular filtration rate (eGFR) was calculated using the MDRD4 equation. Mean+-SD eGFR values are presented at 3, 6, and 12. and compared against baseline (1 Month post-transplant).

Time frame: 12 months

ArmMeasureGroupValue (MEAN)Dispersion
Arm 1To Assess the Change in Renal Function Over Time.Month 639.0 mL/minute/1.73m^2Standard Deviation 5.6
Arm 1To Assess the Change in Renal Function Over Time.Month 1244.0 mL/minute/1.73m^2Standard Deviation 7
Arm 1To Assess the Change in Renal Function Over Time.Month 340.5 mL/minute/1.73m^2Standard Deviation 0.3
Arm 1To Assess the Change in Renal Function Over Time.Baseline40.4 mL/minute/1.73m^2Standard Deviation 5
Arm 2To Assess the Change in Renal Function Over Time.Baseline50.2 mL/minute/1.73m^2Standard Deviation 21.1
Arm 2To Assess the Change in Renal Function Over Time.Month 348.2 mL/minute/1.73m^2Standard Deviation 9.4
Arm 2To Assess the Change in Renal Function Over Time.Month 1253.7 mL/minute/1.73m^2Standard Deviation 14.1
Arm 2To Assess the Change in Renal Function Over Time.Month 651.4 mL/minute/1.73m^2Standard Deviation 8.9
Arm 3To Assess the Change in Renal Function Over Time.Month 1246.0 mL/minute/1.73m^2Standard Deviation 14.3
Arm 3To Assess the Change in Renal Function Over Time.Baseline45.9 mL/minute/1.73m^2Standard Deviation 5.8
Arm 3To Assess the Change in Renal Function Over Time.Month 348.2 mL/minute/1.73m^2Standard Deviation 10
Arm 3To Assess the Change in Renal Function Over Time.Month 647.2 mL/minute/1.73m^2Standard Deviation 17

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026