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Optimization of Post-transplantation Benadamustine and Cyclophosphamide in Patients With High-risk Myeloid Malignancies and a Partially Mismatched Donor

Optimization of Post-transplantation Benadamustine and Cyclophosphamide in Patients With High-risk Myeloid Malignancies and a Partially Mismatched Donor (APTBCy)

Status
Recruiting
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07238712
Acronym
APTBCy
Enrollment
60
Registered
2025-11-20
Start date
2025-05-10
Completion date
2026-12-10
Last updated
2025-11-20

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

Conditions

Acute Myeloid Leukemia (AML), Atypical Chronic Myeloid Leukemia, Chronic Myeloid Leukemia, Myelodysplastic Syndromes (MDS), Myeloprolipherative Neoplsm

Keywords

Post-transplantation cyclophosphamide, Post-transplantation bendamustine, graft-versus-host disease, abatacept, ruxolitinib

Brief summary

Optimization of bendamustine-containg graft-versus-host disease (GVHD) prophylaxis to reduce the incidence of secondary haemophagocytic lymphohistiocytosis and GVHD

Detailed description

Prognosis of patients undergoing allogeneic stem cell transplantation (HCT) for high-risk myeloid malignancies, including refractory acute myeloid leukemia, with standard HCT technologies have relatively poor prognosis with 10-30% long-term disease-free survival. One of the approaches to augment graft-versus-leukemia effect the use of post-transplantation bendamustine in graft-versus-host disease prophylaxis. Despite high frequency of responses and durable remissions after this approach majority of patients develop a serious complication - cytokine release syndrome, which can be life-threatening in some patients. The combination bendamustine (PTB) and post-transplantation cyclophosphamide (PTCY) facilitates comparable graft-versus leukemia effect to PTB, but with better safety profile and reduced incidence of severe cytokine release syndrome.

Interventions

DRUGRuxolitinib

; Days -1 through +21: ruxolitinib 10 mg/kg/day p.o.

Days -1,+5, +14, +21 abatacept 10 mg/kg/day i.v.

Sponsors

St. Petersburg State Pavlov Medical University
Lead SponsorOTHER

Study design

Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

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

Inclusion criteria

* Patients with indication for allogeneic hematopoietic stem cell transplantation * Patients with \<10/10 HLA-matched related or unrelated donor available. The donor and recipient must be identical by the following genetic loci: HLA-A, HLA-B, HLA-Cw, HLA-DRB1, and HLA-DQB1. * Peripheral blood stem cells or bone marrow as a graft source * Diagnosis: Acute myeloid leukemia Chronic myeloid leukemia, Ph+ Myelodysplastic Syndromes Myeloprolipherative neoplasms - High-risk disease defined as: Acute myeloid leukemia: \>5% of clonal blasts in bone marrow despite adequate previous induction therapy or allogeneic stem cell transplantation Myelodysplastic Syndrome: \>5% of blasts despite previous therapy Myeloid malignancy with with -7 or complex karyotype, or p53 mutation regardless of blast count in bone marrow Treatment-related myelodysplastic syndrome Second or subsequent allogeneic HCT after relapse of a myeloid malignancy Chronic myelomonocytic leukemia Myeloprolipherative neoplasms, unclassifiable \- No severe concurrent illness

Exclusion criteria

* Patients with indication for allogeneic hematopoietic stem cell transplantation * Patients with \<10/10 HLA-matched related or unrelated donor available. The donor and recipient must be identical by the following genetic loci: HLA-A, HLA-B, HLA-Cw, HLA-DRB1, and HLA-DQB1. * Peripheral blood stem cells or bone marrow as a graft source * Diagnosis: Acute myeloid leukemia Chronic myeloid leukemia, Ph+ Myelodysplastic Syndromes Myeloprolipherative neoplasms - High-risk disease defined as: Acute myeloid leukemia: \>5% of clonal blasts in bone marrow despite adequate previous induction therapy or allogeneic stem cell transplantation Myelodysplastic Syndrome: \>5% of blasts despite previous therapy Myeloid malignancy with with -7 or complex karyotype, or p53 mutation regardless of blast count in bone marrow Treatment-related myelodysplastic syndrome Second or subsequent allogeneic HCT after relapse of a myeloid malignancy Chronic myelomonocytic leukemia Myeloprolipherative neoplasms, unclassifiable \- No severe concurrent illness

Design outcomes

Primary

MeasureTime frameDescription
Overall survival analysis2 yearsMeasure: Kaplan-Meier estimate of death from all causes

Secondary

MeasureTime frameDescription
Incidence of HSCT-associated adverse events (safety and toxicity)100 daysToxicity assessment is based on NCI CTC AE 6.0 grades. Veno-occlusive disease incidence and severity assessment is based on EBMT criteria 2016. Transplant-associated microangiopathy incidence assessment is based on Schoettler et al. criteria. All toxicity measurements will be aggregated as severity scores.
Infectious complications, including analysis of severe bacterial, fungal and viral infections incidence100 daysProportion of patients, requiring systemic treatment for bacterial, viral and fungal disease
Incidence of acute GVHD grade II-IV180 daysCumulative incidence of patients with acute GVHD II-IV grade
Incidence of moderate and severe chronic GVHD2 yearsCumulative incidence of patients with moderate and severe chronic GVHD according to MAGIC 2018 criteria
Incidence of secondary hemophagocytic lymphohistiocytosis100 daysBased on H-score diagnostic criteria.
Relapse rate analysis2 yearsCumulative incidence of patients with relapse
Event-free survival analysis2 yearsKaplan-Meier estimate of death or relapse
GVHD-event-free survival analysis2 yearsKaplan-Meier estimate of death, grade III-IV acute GVHD, severe chronic GVHD or relapse
Non-relapse mortality analysis2 yearsCumulative incidence of patients with mortality without hematological relapse of malignancy

Countries

Russia

Contacts

Primary ContactAlexandr D Kulagin, MD, Prof
bmt-director@1spbgmu.ru+78123386265
Backup ContactIvan S Moiseev, MD, Prof.
moisiv@mail.ru+78123386201

Outcome results

None listed

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