A Study Comparing Siplizumab With Rabbit Anti-Thymocyte Globulin to Help the Body Accept a Kidney… (NCT07508787) | Clinical Trial Compass
Not Yet RecruitingPhase 2
A Study Comparing Siplizumab With Rabbit Anti-Thymocyte Globulin to Help the Body Accept a Kidney Transplant
120 participantsStarted 2026-04-29
Plain-language summary
The goal of this clinical trial is to learn if siplizumab can prevent rejection of a kidney transplant in adult participants with end stage kidney disease. The main questions it aims to answer are:
How many adverse events do participants receiving two different doses of siplizumab have compared to rabbit anti-thymocyte globulin (rATG)?
How many participants successfully keep their kidney transplant after receiving siplizumab or rATG? This will be calculated as those participants that did not: die; have their kidney fail to work properly (graft loss); their body rejects their transplant (tissue sample (biopsy)-proven acute rejection: BPAR); or who were lost to follow-up.
How does the body respond to siplizumab after dosing at each of the 2 dose levels?
How does siplizumab work in the body compared to rATG?
Selected participants will be divided into 3 groups. In 2 of the groups, participants will be given siplizumab at one of the two study medicine doses. Participants in the third group will be given rATG. All participants will take the usual anti-rejection medicines given before, during, and after a kidney transplant. All participants will also be given medicines before the study drug to lower the risk of reactions, and medicines used to prevent or treat infections after the transplant.
Participants will be asked to provide their medical history at the first visit at the study site where you will have your kidney transplant. At the first visit and other visits participants will be asked to provide their medication history, have a physical exam, check vital signs, have blood drawn for tests, and have non-invasive tests that record the electrical activity of your heart (ECG) and blood draws.
Participants will be monitored for 12 months after transplant surgery.
Who can participate
Age range
18 Years – 70 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* Recipients of a renal allograft from a non-HLA identical living or deceased donor.
* Recipients of a kidney with a cold ischemia time \< 30 hours; hypothermic machine perfusion within the same timeframe is acceptable.
* Women of childbearing potential, defined as all women physiologically capable of becoming pregnant, must agree to use highly effective methods of contraception.
Exclusion Criteria:
* Transplant recipients seronegative for EBV.
* Transplant recipients receiving a kidney from a non-heart beating donor (ie, DCD) whose organ is retrieved from an uncontrolled DCD or whose donor age \> 55 years of age.
* Multi-organ transplant recipients (eg, kidney-pancreas, organ other than kidney), dual-kidney transplant recipients, recipients with more than one prior kidney transplant, or hematopoietic stem cell transplantation recipients.
* Presence of current or historical DSA via single-antigen bead assay or local SoC. The MFI cut-off value used to determine the presence of DSA will be defined as per the institutional SoC. Results within 3 months prior to transplant are acceptable.
* Crossmatch positive (isolated positive B cell crossmatches are not an exclusion criterion).
* ABO-incompatible recipient.
* Administration of complement inhibitor therapy within 6 months prior to the transplant, or likely to require treatment with complement inhibitor therapy during the study.
* Participants receiving immunosuppressive therapies prior to transplant for pr…
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Assessment of the safety of 2 dose levels of siplizumab versus rATG.