Clinical trial · Interventional
ATG Plus PTCy vs ATG for CGVHD Prophylaxis
A Randomized Pilot Trial Comparing Anti-Thymocyte Globulin (ATG) With ATG Plus Post Transplant Cyclophosphamide (PTCy) for Prophylaxis Against Acute and Chronic Graft Versus Host Disease (GVHD)
NCT04202835CI-TRIAL-00089529active not recruitingPhase 2ClinicalTrials.gov clinicaltrialsProvenance
- Source
- ClinicalTrials.gov
- Retrieved
- Sep 8, 2026
- Layer
- normalized (units and labels harmonized; values unchanged)
- Run
- ING-CLINICALTRIALS-20260908-000001
Summary
Brief summary (as posted)
A Randomized Pilot Trial to test the feasibility of comparing anti-thymocyte globulin plus post transplant cyclophosphamide with anti-thymocyte globulin alone to prevent chronic graft versus host disease.
Conditions
Conditions (3)
Free-text conditions as registered, with the CancerIndex entity they were reconciled to and the match type.
| Condition (as posted) | Mapped entity | Match | Confidence |
|---|---|---|---|
| Acute Leukemia | Acute Leukemia | ONTOLOGY_EXACT | 0.90 |
| Chronic Graft-versus-host-disease | — | UNRESOLVED | — |
| Myelodysplasia | Myelodysplastic Syndrome | ALIAS | 0.90 |
Interventions
Interventions (2)
| Intervention | Type | Mapped drug | Match |
|---|---|---|---|
| Anti-Thymocyte globulin (rabbit) | Drug | — | UNRESOLVED |
| Cyclophosphamide | Drug | Cyclophosphamide | ALIAS |
Design
Arms and outcomes
Arms (2)
- type
- EXPERIMENTAL
- label
- ATG/PTCy
- description
- Anti-Thymocyte Globulin (ATG, Thymoglobulin) 4.5 mg/kg IV (divided 0.5, 2.0, 2.0 mg/kg on days -2, -1 and +1); cyclophosphamide (Post Transplant Cyclophosphamide, PTCy) 50 mg/kg IV daily on days +3 and +4.
- interventionNames
- Drug: Cyclophosphamide
- Drug: Anti-Thymocyte globulin (rabbit)
- type
- ACTIVE_COMPARATOR
- label
- ATG
- description
- Anti-Thymocyte Globulin (ATG, Thymoglobulin) 4.5 mg/kg IV (divided 0.5, 2.0, 2.0 mg/kg on days -2, -1 and +1).
- interventionNames
- Drug: Anti-Thymocyte globulin (rabbit)
Primary outcomes (1)
- measure
- Registration of 80 patients within twenty four months
Eligibility
Eligibility (as posted)
- Sex
- All
- Minimum age
- 16 Years
- Maximum age
- 70 Years
Show eligibility criteria text
Inclusion Criteria:
1. The participant is aged ≥ 16 and deemed medically fit per investigator for protocol
2. The participant has either acute myeloid leukemia in 1st or 2nd complete remission (CR), or has myelodysplastic syndrome
3. The participant will receive a blood progenitor cell graft ("HPC, Apheresis")
4. The participant has a related or unrelated donor, who is fully MHC matched with the recipient at HLA-A, B, C and DRB1.
5. The participant meets the transplant centre's criteria for transplantation, using either myeloablative or reduced intensity conditioning.
6. The participant has good performance status (Karnofsky ≥60%)
7. The participant is able to understand and sign the informed consent form
8. Ability and willingness to comply with study procedures and schedule, in the Investigator's opinion.
9. The participant is receiving their first transplant
Exclusion Criteria:
1. The participant is HIV antibody positive
2. The participant has a hypersensitivity to rabbit proteins or Thymoglobulin® pharmaceutical excipients, glycine or mannitol.
3. The participant has active or chronic infection (i.e. infection requiring oral or IV therapy)
4. The participant (if female and of childbearing potential) is pregnant or breast-feeding at the time of enrollment
5. The participant (if female and of childbearing potential) does not agree to use an adequate contraceptive method from the time of enrollment until a minimum of one year following transplant3
6. The participant (if male and fertile) does not agree to use an adequate contraceptive method from the time of enrollment until a minimum of one year following transplant3
7. The participant has urinary outflow obstruction
8. The participant is in poor condition (determined per institutional guidelines)
9. The participant has acute leukemia in relapse
10. The participant has myelodysplastic syndrome with \> 10% marrow blasts
11. The participant is having their second transplant
12. The participant is taking T-cell antibody prophylaxis (anti-CD52)
13. The participant is receiving a cord blood graft or T-cell depleted grafts
14. The participant has mixed phenotype acute leukemia
15. The participant has prior malignancies, except resected nonmelanoma or treated cervical carcinoma in situ. Cancer treated with curative intent ≥ 5 years previously will be allowed. Cancer treated with curative intent \< 5 years previously must be reviewed and approved by the sponsors.
16. The participant is in complete remission with incomplete recovery (CRi)References
Publications (1)
- DERIVEDWalker I, Deotare U, Elemary M, Elsawy M, Gallagher G, Kliman D, Panzarella T, Hamad N, Schultz KR, Storek J, Paulson K. A randomized pilot trial comparing anti-thymocyte globulin with anti-thymocyte globulin plus post transplant cyclophosphamide for prophylaxis against acute and chronic graft versus host disease in matched donor hematopoietic cell transplants - a study from the Cell Therapy Transplant Canada/ Australasian Leukemia Lymphoma Group Consortium. Bone Marrow Transplant. 2026 Aug 21. doi: 10.1038/s41409-026-03024-7. Online ahead of print. PMID 42629427