Trial Outcomes & Findings for Subcutaneous Abatacept in Renal Transplant Recipients (NCT NCT05975450)

NCT ID: NCT05975450

Last Updated: 2026-04-03

Results Overview

Incidence of any malignancy, including Post-Transplant Lymphoproliferative Disorder (PTLD)

Recruitment status

COMPLETED

Study phase

PHASE1

Target enrollment

16 participants

Primary outcome timeframe

Up to 12 months post-transplantation, an average of 8 months

Results posted on

2026-04-03

Participant Flow

Participants were recruited from Emory Healthcare of Atlanta in Atlanta, Georgia, USA. Participant enrollment began August 2, 2023, and all follow-up was complete by February 14, 2025.

Participant milestones

Participant milestones
Measure
Abatacept
Participants will be assigned to a treatment regimen between 2 and 5 months after transplantation. The study drug will be administered until month 12 post-transplant; at that point, all participants will be transitioned to a physician-directed immunosuppressive regimen post-study. Abatacept 125Mg/Ml Syringe: Participants on qualifying belatacept regimen (with low dose tacrolimus, mmf and prednisone) will have their maintenance regimen changed from i.v. belatacept to s.c. abatacept, which will continue through week 52 (month 12) post-transplant: Costimulation blockade: \- Abatacept 125 mg subcutaneous weekly
Overall Study
STARTED
16
Overall Study
COMPLETED
14
Overall Study
NOT COMPLETED
2

Reasons for withdrawal

Reasons for withdrawal
Measure
Abatacept
Participants will be assigned to a treatment regimen between 2 and 5 months after transplantation. The study drug will be administered until month 12 post-transplant; at that point, all participants will be transitioned to a physician-directed immunosuppressive regimen post-study. Abatacept 125Mg/Ml Syringe: Participants on qualifying belatacept regimen (with low dose tacrolimus, mmf and prednisone) will have their maintenance regimen changed from i.v. belatacept to s.c. abatacept, which will continue through week 52 (month 12) post-transplant: Costimulation blockade: \- Abatacept 125 mg subcutaneous weekly
Overall Study
Withdrawal by Subject
1
Overall Study
Patient developed BK BK Polyoma Virus one week before starting the study drug
1

Baseline Characteristics

Subcutaneous Abatacept in Renal Transplant Recipients

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
Abatacept
n=14 Participants
Participants will be assigned to a treatment regimen between 2 and 5 months after transplantation. The study drug will be administered until month 12 post-transplant; at that point, all participants will be transitioned to a physician-directed immunosuppressive regimen post-study. Abatacept 125Mg/Ml Syringe: Participants on qualifying belatacept regimen (with low dose tacrolimus, mmf and prednisone) will have their maintenance regimen changed from i.v. belatacept to s.c. abatacept, which will continue through week 52 (month 12) post-transplant: Costimulation blockade: \- Abatacept 125 mg subcutaneous weekly
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
n=5 Participants
Age, Categorical
<=18 years
0 Participants
n=5 Participants
Age, Categorical
Between 18 and 65 years
14 Participants
n=5 Participants
Age, Categorical
>=65 years
0 Participants
n=5 Participants
Sex: Female, Male
Female
3 Participants
n=5 Participants
Sex: Female, Male
Male
11 Participants
n=5 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
1 Participants
n=5 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
13 Participants
n=5 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants
n=5 Participants
Race (NIH/OMB)
American Indian or Alaska Native
1 Participants
n=5 Participants
Race (NIH/OMB)
Asian
1 Participants
n=5 Participants
Race (NIH/OMB)
Black or African American
7 Participants
n=5 Participants
Race (NIH/OMB)
White
4 Participants
n=5 Participants
Race (NIH/OMB)
More than one race
0 Participants
n=5 Participants
Race (NIH/OMB)
Unknown or Not Reported
1 Participants
n=5 Participants
Region of Enrollment
United States
14 Participants
n=5 Participants

PRIMARY outcome

Timeframe: Up to 12 months post-transplantation, an average of 8 months

Compliance and self-administration will be measured using the abatacept administration logs and autoinjector accountability.

Outcome measures

Outcome measures
Measure
Abatacept
n=14 Participants
Participants will be assigned to a treatment regimen between 2 and 5 months after transplantation. The study drug will be administered until month 12 post-transplant; at that point, all participants will be transitioned to a physician-directed immunosuppressive regimen post-study. Abatacept 125Mg/Ml Syringe: Participants on qualifying belatacept regimen (with low dose tacrolimus, mmf and prednisone) will have their maintenance regimen changed from i.v. belatacept to s.c. abatacept, which will continue through week 52 (month 12) post-transplant: Costimulation blockade: \- Abatacept 125 mg subcutaneous weekly
Number of Participants Who Are Compliant With Self-administration
Participants compliants with all doses
8 Participants
Number of Participants Who Are Compliant With Self-administration
Participants who missed one (1) dose
5 Participants
Number of Participants Who Are Compliant With Self-administration
Participants who missed two (2) doses
1 Participants

PRIMARY outcome

Timeframe: Up to 12 months post-transplantation, an average of 8 months

For-cause biopsies may be performed as dictated by the clinical team. A for-cause biopsy (i.e., graft dysfunction) may be performed in cases of increased serum creatinine, proteinuria, or other clinical symptoms at the discretion of the site Investigator.

Outcome measures

Outcome measures
Measure
Abatacept
n=14 Participants
Participants will be assigned to a treatment regimen between 2 and 5 months after transplantation. The study drug will be administered until month 12 post-transplant; at that point, all participants will be transitioned to a physician-directed immunosuppressive regimen post-study. Abatacept 125Mg/Ml Syringe: Participants on qualifying belatacept regimen (with low dose tacrolimus, mmf and prednisone) will have their maintenance regimen changed from i.v. belatacept to s.c. abatacept, which will continue through week 52 (month 12) post-transplant: Costimulation blockade: \- Abatacept 125 mg subcutaneous weekly
Number of Participants Who Remain Free of Biopsy-proven Acute T-cell Mediated Rejection (aTCMR) or Antibody-mediated Rejection (ABMR) as Defined by Banff Criteria at or Before 12 Months After Transplantation.
13 Participants

PRIMARY outcome

Timeframe: Up to 12 months post-transplantation, an average of 8 months

Assessments of serious adverse events will be completed at each study visit from the time abatacept starts through 12 months post-transplant.

Outcome measures

Outcome measures
Measure
Abatacept
n=14 Participants
Participants will be assigned to a treatment regimen between 2 and 5 months after transplantation. The study drug will be administered until month 12 post-transplant; at that point, all participants will be transitioned to a physician-directed immunosuppressive regimen post-study. Abatacept 125Mg/Ml Syringe: Participants on qualifying belatacept regimen (with low dose tacrolimus, mmf and prednisone) will have their maintenance regimen changed from i.v. belatacept to s.c. abatacept, which will continue through week 52 (month 12) post-transplant: Costimulation blockade: \- Abatacept 125 mg subcutaneous weekly
Number of Participants Presenting Serious Adverse Events
1 Participants

PRIMARY outcome

Timeframe: Up to 12 months post-transplantation, an average of 8 months

Any serious infection requiring hospitalization or prolonged therapy, including but not limited to treatment ≥ 20 days, will be documented.

Outcome measures

Outcome measures
Measure
Abatacept
n=14 Participants
Participants will be assigned to a treatment regimen between 2 and 5 months after transplantation. The study drug will be administered until month 12 post-transplant; at that point, all participants will be transitioned to a physician-directed immunosuppressive regimen post-study. Abatacept 125Mg/Ml Syringe: Participants on qualifying belatacept regimen (with low dose tacrolimus, mmf and prednisone) will have their maintenance regimen changed from i.v. belatacept to s.c. abatacept, which will continue through week 52 (month 12) post-transplant: Costimulation blockade: \- Abatacept 125 mg subcutaneous weekly
Number of Participants With Serious Infections
0 Participants

PRIMARY outcome

Timeframe: Up to 12 months post-transplantation, an average of 8 months

All subjects will be monitored for CMV infection by quantitative polymerase chain reaction (PCR) in the blood per the Emory Transplant Center standard of care protocol, CMV viremia stratified by count ≥35 but \<10,000 or ≥ 10,000.

Outcome measures

Outcome measures
Measure
Abatacept
n=14 Participants
Participants will be assigned to a treatment regimen between 2 and 5 months after transplantation. The study drug will be administered until month 12 post-transplant; at that point, all participants will be transitioned to a physician-directed immunosuppressive regimen post-study. Abatacept 125Mg/Ml Syringe: Participants on qualifying belatacept regimen (with low dose tacrolimus, mmf and prednisone) will have their maintenance regimen changed from i.v. belatacept to s.c. abatacept, which will continue through week 52 (month 12) post-transplant: Costimulation blockade: \- Abatacept 125 mg subcutaneous weekly
Number of Patients With Cytomegalovirus (CMV) Viremia Stratified by the Magnitude
≥35 but <10,000
1 Participants
Number of Patients With Cytomegalovirus (CMV) Viremia Stratified by the Magnitude
≥ 10,000
1 Participants

PRIMARY outcome

Timeframe: Up to 12 months post-transplantation, an average of 8 months

Undetected, \>0 but \< 1,000, ≥ 1,000 but \<10,000, or ≥ 10,000 - 100,000, ≥100,000 or stratified by log, which is reported as a result.

Outcome measures

Outcome measures
Measure
Abatacept
n=14 Participants
Participants will be assigned to a treatment regimen between 2 and 5 months after transplantation. The study drug will be administered until month 12 post-transplant; at that point, all participants will be transitioned to a physician-directed immunosuppressive regimen post-study. Abatacept 125Mg/Ml Syringe: Participants on qualifying belatacept regimen (with low dose tacrolimus, mmf and prednisone) will have their maintenance regimen changed from i.v. belatacept to s.c. abatacept, which will continue through week 52 (month 12) post-transplant: Costimulation blockade: \- Abatacept 125 mg subcutaneous weekly
Number of Patients With BK Viremia Stratified by the Magnitude
Undetected
13 Participants
Number of Patients With BK Viremia Stratified by the Magnitude
>0 but < 1,000
0 Participants
Number of Patients With BK Viremia Stratified by the Magnitude
≥ 1,000 but <10,000
1 Participants
Number of Patients With BK Viremia Stratified by the Magnitude
≥ 10,000 - 100,000
0 Participants
Number of Patients With BK Viremia Stratified by the Magnitude
100,000 ≥ 100,000
0 Participants

PRIMARY outcome

Timeframe: Up to 12 months post-transplantation, an average of 8 months

Incidence of any malignancy, including Post-Transplant Lymphoproliferative Disorder (PTLD)

Outcome measures

Outcome measures
Measure
Abatacept
n=14 Participants
Participants will be assigned to a treatment regimen between 2 and 5 months after transplantation. The study drug will be administered until month 12 post-transplant; at that point, all participants will be transitioned to a physician-directed immunosuppressive regimen post-study. Abatacept 125Mg/Ml Syringe: Participants on qualifying belatacept regimen (with low dose tacrolimus, mmf and prednisone) will have their maintenance regimen changed from i.v. belatacept to s.c. abatacept, which will continue through week 52 (month 12) post-transplant: Costimulation blockade: \- Abatacept 125 mg subcutaneous weekly
Number of Participants Who Develop Any Malignancy
0 Participants

SECONDARY outcome

Timeframe: Up to 12 months post-transplantation, an average of 8 months

Death and/or allograft failure at or before 12 months after transplantation

Outcome measures

Outcome measures
Measure
Abatacept
n=14 Participants
Participants will be assigned to a treatment regimen between 2 and 5 months after transplantation. The study drug will be administered until month 12 post-transplant; at that point, all participants will be transitioned to a physician-directed immunosuppressive regimen post-study. Abatacept 125Mg/Ml Syringe: Participants on qualifying belatacept regimen (with low dose tacrolimus, mmf and prednisone) will have their maintenance regimen changed from i.v. belatacept to s.c. abatacept, which will continue through week 52 (month 12) post-transplant: Costimulation blockade: \- Abatacept 125 mg subcutaneous weekly
Number of Participants Experiencing the Composite Outcome of Death or Allograft Failure
0 Participants

SECONDARY outcome

Timeframe: Up to 12 months post-transplantation, an average of 8 months

Incidence of biopsy-proven acute T-cell mediated cellular rejection (BP-aTCMR)

Outcome measures

Outcome measures
Measure
Abatacept
n=14 Participants
Participants will be assigned to a treatment regimen between 2 and 5 months after transplantation. The study drug will be administered until month 12 post-transplant; at that point, all participants will be transitioned to a physician-directed immunosuppressive regimen post-study. Abatacept 125Mg/Ml Syringe: Participants on qualifying belatacept regimen (with low dose tacrolimus, mmf and prednisone) will have their maintenance regimen changed from i.v. belatacept to s.c. abatacept, which will continue through week 52 (month 12) post-transplant: Costimulation blockade: \- Abatacept 125 mg subcutaneous weekly
Number of Participants With Biopsy-proven Acute T-cell Mediated Cellular Rejection (BP-aTCMR)
1 Participants

SECONDARY outcome

Timeframe: Up to 12 months post-transplantation, an average of 8 months

The number of participants treated for rejection with any of the following: i) corticosteroids within 12 months, ii) T-cell depleting therapy within 12 months, iii) any other treatment for rejection within 12 months of transplantation

Outcome measures

Outcome measures
Measure
Abatacept
n=14 Participants
Participants will be assigned to a treatment regimen between 2 and 5 months after transplantation. The study drug will be administered until month 12 post-transplant; at that point, all participants will be transitioned to a physician-directed immunosuppressive regimen post-study. Abatacept 125Mg/Ml Syringe: Participants on qualifying belatacept regimen (with low dose tacrolimus, mmf and prednisone) will have their maintenance regimen changed from i.v. belatacept to s.c. abatacept, which will continue through week 52 (month 12) post-transplant: Costimulation blockade: \- Abatacept 125 mg subcutaneous weekly
Number of Participants Treated for Rejection
1 Participants

SECONDARY outcome

Timeframe: Up to 12 months post-transplantation, an average of 8 months

For-cause biopsies may be performed as dictated by the clinical team. A for-cause biopsy (i.e., graft dysfunction) may be performed in cases of increased serum creatinine, proteinuria, or other clinical symptoms at the discretion of the site Investigator.

Outcome measures

Outcome measures
Measure
Abatacept
n=14 Participants
Participants will be assigned to a treatment regimen between 2 and 5 months after transplantation. The study drug will be administered until month 12 post-transplant; at that point, all participants will be transitioned to a physician-directed immunosuppressive regimen post-study. Abatacept 125Mg/Ml Syringe: Participants on qualifying belatacept regimen (with low dose tacrolimus, mmf and prednisone) will have their maintenance regimen changed from i.v. belatacept to s.c. abatacept, which will continue through week 52 (month 12) post-transplant: Costimulation blockade: \- Abatacept 125 mg subcutaneous weekly
Number of Participants Treated for Acute Rejection Due to Clinical Suspicion Rather Than BP-aTCMR or BP-aABMR Within 12 Months of Transplantation.
1 Participants

SECONDARY outcome

Timeframe: Up to 12 months post-transplantation, an average of 8 months

For-cause biopsies may be performed as dictated by the clinical team. A for-cause biopsy (i.e., graft dysfunction) may be performed in cases of increased serum creatinine, proteinuria, or other clinical symptoms at the discretion of the site Investigator.

Outcome measures

Outcome measures
Measure
Abatacept
n=14 Participants
Participants will be assigned to a treatment regimen between 2 and 5 months after transplantation. The study drug will be administered until month 12 post-transplant; at that point, all participants will be transitioned to a physician-directed immunosuppressive regimen post-study. Abatacept 125Mg/Ml Syringe: Participants on qualifying belatacept regimen (with low dose tacrolimus, mmf and prednisone) will have their maintenance regimen changed from i.v. belatacept to s.c. abatacept, which will continue through week 52 (month 12) post-transplant: Costimulation blockade: \- Abatacept 125 mg subcutaneous weekly
Number of Participants With Biopsy-proven Active Antibody-mediated Rejection (BP-aABMR)
1 Participants

SECONDARY outcome

Timeframe: Up to 12 months post-transplantation, an average of 8 months

For-cause biopsies may be performed as dictated by the clinical team. A for-cause biopsy (i.e., graft dysfunction) may be performed in cases of increased serum creatinine, proteinuria, or other clinical symptoms at the discretion of the site Investigator.

Outcome measures

Outcome measures
Measure
Abatacept
n=14 Participants
Participants will be assigned to a treatment regimen between 2 and 5 months after transplantation. The study drug will be administered until month 12 post-transplant; at that point, all participants will be transitioned to a physician-directed immunosuppressive regimen post-study. Abatacept 125Mg/Ml Syringe: Participants on qualifying belatacept regimen (with low dose tacrolimus, mmf and prednisone) will have their maintenance regimen changed from i.v. belatacept to s.c. abatacept, which will continue through week 52 (month 12) post-transplant: Costimulation blockade: \- Abatacept 125 mg subcutaneous weekly
Number of Participants With Changes in Allograft Biopsies for the 5 Categories of aTCMR Specified in the Banff Schema
1 Participants

SECONDARY outcome

Timeframe: Up to 12 months post-transplantation, an average of 8 months

Population: Only one participant developed changes in their allograft biopsies.

Calculations will be made from the start of abatacept through to 12 months post-transplant. A for-cause biopsy (i.e., graft dysfunction) may be performed in cases of increased serum creatinine, proteinuria, or other clinical symptoms at the discretion of the site Investigator.

Outcome measures

Outcome measures
Measure
Abatacept
n=1 Participants
Participants will be assigned to a treatment regimen between 2 and 5 months after transplantation. The study drug will be administered until month 12 post-transplant; at that point, all participants will be transitioned to a physician-directed immunosuppressive regimen post-study. Abatacept 125Mg/Ml Syringe: Participants on qualifying belatacept regimen (with low dose tacrolimus, mmf and prednisone) will have their maintenance regimen changed from i.v. belatacept to s.c. abatacept, which will continue through week 52 (month 12) post-transplant: Costimulation blockade: \- Abatacept 125 mg subcutaneous weekly
Time to Changes in Allograft Biopsies for the 5 Categories of aTCMR Specified in the Banff Schema
28 days

SECONDARY outcome

Timeframe: Up to 12 months post-transplantation, an average of 8 months

Number of participants who develop de-novo DSA

Outcome measures

Outcome measures
Measure
Abatacept
n=14 Participants
Participants will be assigned to a treatment regimen between 2 and 5 months after transplantation. The study drug will be administered until month 12 post-transplant; at that point, all participants will be transitioned to a physician-directed immunosuppressive regimen post-study. Abatacept 125Mg/Ml Syringe: Participants on qualifying belatacept regimen (with low dose tacrolimus, mmf and prednisone) will have their maintenance regimen changed from i.v. belatacept to s.c. abatacept, which will continue through week 52 (month 12) post-transplant: Costimulation blockade: \- Abatacept 125 mg subcutaneous weekly
Number of Participants Who Develop De-novo Donor Specific Antibody (DSA)
0 Participants

SECONDARY outcome

Timeframe: Baseline and 12 months post-transplantation

The eGFR will be calculated at the time abatacept is started and 12 months post-transplant

Outcome measures

Outcome measures
Measure
Abatacept
n=14 Participants
Participants will be assigned to a treatment regimen between 2 and 5 months after transplantation. The study drug will be administered until month 12 post-transplant; at that point, all participants will be transitioned to a physician-directed immunosuppressive regimen post-study. Abatacept 125Mg/Ml Syringe: Participants on qualifying belatacept regimen (with low dose tacrolimus, mmf and prednisone) will have their maintenance regimen changed from i.v. belatacept to s.c. abatacept, which will continue through week 52 (month 12) post-transplant: Costimulation blockade: \- Abatacept 125 mg subcutaneous weekly
Estimated Glomerular Filtration Rate (eGFR)
Baseline
67.5 mL/min/1.73 m^2
Standard Deviation 18.8
Estimated Glomerular Filtration Rate (eGFR)
12 months post-transplant
66.3 mL/min/1.73 m^2
Standard Deviation 20.0

SECONDARY outcome

Timeframe: Up to 12 months post-transplantation, an average of 8 months

Population: Only one participant developed changes in their allograft biopsies.

All events will be documented, and calculations will be made from the start of abatacept through 12 months post-transplant.

Outcome measures

Outcome measures
Measure
Abatacept
n=1 Participants
Participants will be assigned to a treatment regimen between 2 and 5 months after transplantation. The study drug will be administered until month 12 post-transplant; at that point, all participants will be transitioned to a physician-directed immunosuppressive regimen post-study. Abatacept 125Mg/Ml Syringe: Participants on qualifying belatacept regimen (with low dose tacrolimus, mmf and prednisone) will have their maintenance regimen changed from i.v. belatacept to s.c. abatacept, which will continue through week 52 (month 12) post-transplant: Costimulation blockade: \- Abatacept 125 mg subcutaneous weekly
Number of Days to Events [TCMR, ABMR, De-novo Specific Antibodies (DSA) Formation, Graft Loss].
28 days to acute rejection

Adverse Events

Abatacept

Serious events: 1 serious events
Other events: 1 other events
Deaths: 0 deaths

Serious adverse events

Serious adverse events
Measure
Abatacept
n=14 participants at risk
Participants will be assigned to a treatment regimen between 2 and 5 months after transplantation. The study drug will be administered until month 12 post-transplant; at that point, all participants will be transitioned to a physician-directed immunosuppressive regimen post-study. Abatacept 125Mg/Ml Syringe: Participants on qualifying belatacept regimen (with low dose tacrolimus, mmf and prednisone) will have their maintenance regimen changed from i.v. belatacept to s.c. abatacept, which will continue through week 52 (month 12) post-transplant: Costimulation blockade: \- Abatacept 125 mg subcutaneous weekly
Blood and lymphatic system disorders
Acute Rejection
7.1%
1/14 • Information on adverse events was collected from all participants throughout the study intervention and up to 12 months post-transplant, with an average of 8 months.

Other adverse events

Other adverse events
Measure
Abatacept
n=14 participants at risk
Participants will be assigned to a treatment regimen between 2 and 5 months after transplantation. The study drug will be administered until month 12 post-transplant; at that point, all participants will be transitioned to a physician-directed immunosuppressive regimen post-study. Abatacept 125Mg/Ml Syringe: Participants on qualifying belatacept regimen (with low dose tacrolimus, mmf and prednisone) will have their maintenance regimen changed from i.v. belatacept to s.c. abatacept, which will continue through week 52 (month 12) post-transplant: Costimulation blockade: \- Abatacept 125 mg subcutaneous weekly
Reproductive system and breast disorders
Hematospermia
7.1%
1/14 • Information on adverse events was collected from all participants throughout the study intervention and up to 12 months post-transplant, with an average of 8 months.
Cardiac disorders
Atrial Fibrillation
7.1%
1/14 • Information on adverse events was collected from all participants throughout the study intervention and up to 12 months post-transplant, with an average of 8 months.
Investigations
Increased creatinine
7.1%
1/14 • Information on adverse events was collected from all participants throughout the study intervention and up to 12 months post-transplant, with an average of 8 months.
Immune system disorders
Possible Class II Donor-Specific Antibodies (DSA)
7.1%
1/14 • Information on adverse events was collected from all participants throughout the study intervention and up to 12 months post-transplant, with an average of 8 months.
Infections and infestations
Viremia
7.1%
1/14 • Information on adverse events was collected from all participants throughout the study intervention and up to 12 months post-transplant, with an average of 8 months.
Renal and urinary disorders
Acute kidney injury (AKI)
7.1%
1/14 • Information on adverse events was collected from all participants throughout the study intervention and up to 12 months post-transplant, with an average of 8 months.
Investigations
Low white blood cell (WBC) count
7.1%
1/14 • Information on adverse events was collected from all participants throughout the study intervention and up to 12 months post-transplant, with an average of 8 months.
General disorders
Irritability
7.1%
1/14 • Information on adverse events was collected from all participants throughout the study intervention and up to 12 months post-transplant, with an average of 8 months.

Additional Information

Idelberto R Badell, MD

Emory University

Phone: 404-712-6562

Results disclosure agreements

  • Principal investigator is a sponsor employee
  • Publication restrictions are in place