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NCT Number: NCT04232241

Matched Unrelated vs. Haploidentical Donor for Allogeneic Stem Cell Transplantation in Patients With Acute Leukemia

Primary objective of this open label, two-arm, multicenter, multinational, randomized trial is to compare anti-leukemic activity of allogeneic stem cell transplantation for patients with acute leukemia in complete remission between a 10/10 HLA matched unrelated donor and a haploidentical donor.

The hypothesis: Haploidentical stem cell transplantation with post cyclophosphamide induces a stronger anti-leukemic activity in comparison to 10/10 HLA matched unrelated donor and reduces the risk of relapse at 2 years after stem cell transplantation by 10%.

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Key information

Conditions

Acute Myeloid Leukemia in Remission Acute Lymphoblastic Leukemia in Remission Bone Marrow Diseases Hematologic Diseases Hemic and Lymphatic Diseases Immune System Diseases Immunoproliferative Disorders Leukemia Leukemia, Lymphoid Leukemia, Myeloid Leukemia, Myeloid, Acute Lymphatic Diseases Lymphoproliferative Disorders Myelodysplastic Syndromes Neoplasms Neoplasms by Histologic Type Precursor Cell Lymphoblastic Leukemia-Lymphoma

Age range

18 year–70 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 2

Primary location

LKH-Univ. Klinikum Graz, Graz, Austria

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About this study

Secondary objectives are to assess and compare the safety and efficacy of study treatments therapy in both study arms on non-relapse mortality (NRM), relapse-free survival (RFS), Overall survival (OS), QOL, toxicity, development of acute and chronic GvDH as well as engraftment and chimerism and impact of measurable residual disease.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Acute Myeloid Leukemia (AML) intermediate or high risk according to ELN or Acute Lymphoblastic Leukemia (ALL) high risk according to ESMO guidelines in 1. CR or AML/ALL in 2. CR, or high risk MDS (according to IPSS-R) in 1. CR or 2. CR.
  • Patients age: 18 - 70 years at time of inclusion (female and male).
  • Patients understand and voluntarily sign an informed consent form.
  • ECOG ≤ 2.
  • 10/10 HLA-matched unrelated donor and haploidentical (≥ 5/10 and ≤ 8/10 HLA) relative matched donor available at least 4 weeks after completion of induction and/or consolidation therapy.
  • Females/Males who agree to comply with the applicable contraceptive requirements of the protocol.

Exclusion criteria

  • Severe renal, hepatic, pulmonary or cardiac disease, such as:
  • total bilirubin, SGPT or SGOT > 3 times upper the normal level
  • left ventricular ejection fraction < 30 %
  • creatinine clearance < 30 ml/min
  • DLCO < 35 % and/or receiving supplementary continuous oxygen
  • Positive serology for HIV.
  • Pregnant or lactating women (positive serum pregnancy test).
  • Age < 18 and ≥ 71 years.
  • Uncontrolled invasive fungal infection at time of screening (baseline).
  • Serious psychiatric or psychological disorders.
  • Participation in another study with ongoing use of unlicensed investigational product from 28 days before study enrollment.
  • Uncontrolled severe autoimmune disease or uncontrolled other malignancy.
  • Availability of an HLA-identical sibling as donor source.

Treatment and study plan

Allogeneic Stem Cell Transplantation

Drug

Allogeneic Stem Cell Transplantation

Primary outcomes

  1. Relapse incidence at two years between both arms

    Time frame: 2 years

    The primary efficacy endpoint will be analyzed using cumulative incidence estimation to assess the subdistribution hazard rates for both treatment groups at two years after accounting for competing risk events.

Secondary outcomes

  1. Overall survival at two years between both arms

    Time frame: 2 years

    The overall survival at two years between both arms will be presented with Kaplan-Meier's estimates of survival.

  2. Overall survival for all patients assigned to one of the two treatment arms as time to event endpoint

    Time frame: through study completion, an average of two yeras

    The overall survival for all patients will be presented with Kaplan-Meier curve. To compare the survival distributions between two arms, log-rank test will be performed, and two-sided p-values will be presented.

    If applicable, Cox regression model stratified by the types of leukemia, types of complete remission and conditioning will be performed as sensitivity analysis.

  3. Comparison of GVHD/relapse-free survival as Composite endpoint in both arms

    Time frame: Starting at day +30 (+/- 3 d) to 24 months (+/- 1 mo) after allogenic stem cell transplantation (SCT)

    The rate of composite endpoint in both arms will be analyzed with the same methods as for the overall survival at two years between both arms.

  4. Comparison of non-relapsed mortality (NRM) at 1 and 2 years after allogeneic SCT in both arms

    Time frame: At 1 and 2 years after allogeneic SCT

    Due to the existence of competing risk events (persisting disease and relapse), NRM of each arm at 1 and 2 years after allogeneic SCT will be analyzed with the same methods as for the primary endpoint

  5. Comparison of acute graft-versus-host disease (aGVHD) on day +100 and 1 year (max grade) after allogeneic SCT according to the Glucksberg scale revised by Przepiorka et al. between both arms

    Time frame: On day +100 and 1 year (max grade) after allogeneic SCT

    For each time point, the frequency and percentage of aGVHD (maximum grade) of each arm will be presented. To compare the difference between both arms, logistic regression adjusted for covariates and stratification factors will be performed.

  6. Comparison of chronic graft-versus-host disease (cGVHD) according to the NIH consensus criteria of Jagasia et al. at 1 and 2 years after allogeneic SCT between both arms

    Time frame: At 1 and 2 years after allogeneic SCT

    For each time point, the frequency and percentage of cGVHD of each arm will be presented. To compare the difference between both arms, logistic regression adjusted for the stratification factors will be performed.

  7. Comparison of toxicity of both regimens scored according to the current version of the NCI CTCAE between both arms

    Time frame: through study completion, an average of two yeras

    Safety will be analyzed with frequency of patients with AEs as described above.

  8. Comparison of immune reconstitution between both arms

    Time frame: At day 30, 100, 6 months, 1 year and 2 years after allogenic SCT

    Frequency and percentage of patients having immune reconstitution in two arms will be provided. For the comparison between two arms, logistic regression adjusted for the stratification factors will be performed.

  9. Comparison of full donor chimerism between both arms

    Time frame: At day 30, 100, 6 months, 1 year and 2 years after allogenic SCT

    Frequency and percentage of patients having full donor chimerism in two arms will be provided. For the comparison between two arms, logistic regression adjusted for the stratification factors will be performed.

  10. Evaluation of Sorror Risk Score on outcome after allogeneic SCT

    Time frame: At baseline

    Comorbidity score after Sorror will be assessed prior to randomization and outcome in both arms will be analyzed according the pre-transplant Sorror score.

  11. Comparison of QOL (FACT-BMT) before and after transplantation at + 100 days, 6 months, 1 year, 2 years between both arms

    Time frame: At day 100, 6 months, 1 year and 2 years after allogenic SCT

    The means of change in scores at each time point (day 100, 6 months, 1 year and 2 years after transplantation respectively) from baseline and the confidence intervals of each arm will be presented. To compare the difference in QOL scores between both arms, logistic regression adjusted for covariates and stratification factors will be performed for each time point.

Other outcomes

  1. Scientific Endpoint (optional)

    Time frame: 2 years

    Comparison of relapse incidence at two years between MRD positive and negative patients in both arms

  2. Scientific Endpoint (optional)

    Time frame: 2 years

    Comparison of overall survival at two years between MRD positive and negative patients in both arms

Sponsors and collaborators

Lead sponsor

Universitätsklinikum Hamburg-Eppendorf

Other

Collaborators

  • Gesellschaft für Therapieforschung mbH
  • Staburo GmbH

Registry information

Official study title

Matched Unrelated vs. Haploidentical Donor for Allogeneic Stem Cell Transplantation in Patients With Acute Leukemia With Identical GVHD Prophylaxis - A Randomized Prospective European Trial.

Important dates

Study start
2019
Primary completion
2026
Study completion
2026
First posted
Jan 18, 2020
Registry last updated
Apr 22, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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