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Graft-versus-Host Disease (GVHD)Phase 2GVHD-PTCyNCT06926595

Allogeneic HSCT With Low-Dose Post-Transplant Cyclophosphamide for GVHD Prevention

A Phase 2 study testing Cyclophosphamide (primary intervention for GVHD prophylaxis) in people with Graft-versus-Host Disease (GVHD) and Hematologic Malignancies, run by Milton S. Hershey Medical Center at 1 site in United States.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
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Trial summary

This Phase 2, single-arm, open-label study aims to evaluate the safety and efficacy of low-dose (25 mg/kg) post-transplant cyclophosphamide (PTCy) for prophylaxis of Graft-versus-Host Disease (GVHD) in patients undergoing allogeneic stem cell transplantation following reduced-intensity or non-myeloablative… Read more about this study

Who is it for?
Ages 18 years and older
What is being tested?
Cyclophosphamide (primary intervention for GVHD prophylaxis)
Could I receive a placebo?
No, everyone receives an active treatment
How many people
41 participants
Where
1 siteUnited States
Study dates
9 Mar 2026to 1 Nov 2031
Phase
Phase 2
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Age 18 or older at the time of study enrollment.
  • Patients with acute leukemia (acute myeloid leukemia, acute lymphoblastic leukemia, mixed phenotype acute leukemia) or chronic myeloid leukemia with no circulating blasts and less than 5% blasts in the bone marrow.
  • Flow cytometric, polymerase chain reaction (PCR) or next generation sequencing (NGS) detected measurable residual disease is permitted.
  • Patients with myelodysplastic syndrome (MDS) or chronic myelomonocytic leukemia with no circulating blasts and less than 10% blasts in the bone marrow (exception allowed due to lack of difference in outcomes with <5% vs 5-10% blasts in this disease).
  • Patients with secondary acute myeloid leukemia progressing from pre-existing myelodysplastic syndrome, myeloproliferative disease (MPN), or MDS/MPN overlap syndrome.
  • Patients with relapsed or refractory chronic lymphocytic leukemia/small lymphocytic lymphoma who are indicated for allogeneic stem cell transplantation.
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  • Patients with lymphoma who are indicated for allogeneic stem cell transplantation, including follicular lymphoma, Hodgkin lymphoma, diffuse large B cell lymphoma (including primary mediastinal B cell lymphoma), mantle cell lymphoma, peripheral T cell lymphomas, and Richter's transformation.
  • Planned reduced intensity or non-myeloablative conditioning regimen.
  • Patients must have a related or unrelated peripheral blood stem cell donor as follows:
  • Sibling donor must be at least haploidentical using high resolution DNA-based HLA typing.
  • Children or parent donor must be at least haploidentical using high resolution DNA-based HLA typing. Children donors must be at least 18 years of age at the time of evaluation.
  • Unrelated donors must be a 7/8 or 8/8 match at HLA-A, B, C, and DRB1 at high resolution using DNA based typing.
  • Cardiac function: must demonstrate at ejection fraction of at least 40%.
  • Pulmonary function: must have FEV1 of at least 50% predicted, and DLCO corrected for hemoglobin of at least 40% predicted.
  • Karnofsky performance status at least 70%.
  • Women of childbearing potential (WOCP), defined as not surgically sterile (hysterectomy, tubal ligation, or oophorectomy) or at least 1 year postmenopausal, must have a negative serum pregnancy test before conditioning regimen.
  • Female patients (unless post-menopausal or surgically sterilized) must agree to practice two effective methods of contraception simultaneously or agree to completely abstain from heterosexual intercourse from the time of signing informed consent through 12 months post-transplant.
  • Male patients (even if surgically sterilized) who are partners of women of childbearing potential must agree to practice effective barrier contraception or abstain from heterosexual intercourse from the time of signing the informed consent through 12 months post-transplant.

Who cannot join

  • Prior allogeneic stem cell transplant.
  • Active central nervous system (CNS) involvement by malignant cells.
  • Uncontrolled bacterial, viral, or fungal infections (currently taking medication with progression or no clinical improvement).
  • Seropositive for human immunodeficiency virus (HIV) with detectable viral load, hepatitis B virus (HBV) or hepatitis C virus (HCV) with detectable viral load. Hepatitis B surface antibody positive due to vaccination or natural immunity are permitted. Patients previously treated for HCV and considered to be in sustained virologic remission (SVR) are allowed.
  • Myocardial infarction within 6 months prior to enrollment, New York Heart Association (NYHA) class III-IV heart failure, uncontrolled angina, severe uncontrolled ventricular arrhythmias, or electrocardiographic evidence of acute ischemia.
  • Pregnant or lactating female patients (unless feeding via formula). Women of childbearing potential (WOCBP) are required to have a negative serum or urine pregnancy test prior to conditioning regimen.
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  • Serious medical or psychiatric illness likely to interfere with participation in the study.
  • Use of investigational agents.
  • Haploidentical related recipient who are positive for DSA ≥ 5000 MFI by solid phase microarray method (Luminex).
  • Any patient with steroid dose more than 10 mg/day within a week of registration.
  • Autoimmune disorder requiring any active immunosuppression therapy.

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

United States1 site, 1 recruiting
  • Penn State Cancer Institute

    Hershey, Pennsylvania, 17033

    7175315471, PSCI-CTO@pennstatehealth.psu.edu

    Recruiting

Other trials in United States

About this study

Official title: Allogeneic Hematopoietic Stem Cell Transplantation (HSCT) With Low-Dose Post-Transplant Cyclophosphamide for Prophylaxis of Graft-versus-Host Disease in Hematological Malignancies

This Phase 2, single-arm, open-label study aims to evaluate the safety and efficacy of low-dose (25 mg/kg) post-transplant cyclophosphamide (PTCy) for prophylaxis of Graft-versus-Host Disease (GVHD) in patients undergoing allogeneic stem cell transplantation following reduced-intensity or non-myeloablative conditioning. The study will focus on matched sibling, matched unrelated, and haploidentical peripheral blood stem cell donors. The primary endpoint is 1-year GVHD-Free Relapse-Free Survival (GRFS). The study seeks to determine if low-dose PTCy offers similar outcomes as higher doses, with potentially reduced toxicity.

Read the detailed description

This study investigates the use of low-dose post-transplant cyclophosphamide (PTCy) for GVHD prophylaxis in a Phase 2, single-arm design. It involves patients receiving allogeneic stem cell transplantation with peripheral blood stem cells from matched sibling, matched unrelated, and haploidentical donors, following reduced-intensity or non-myeloablative conditioning. The aim is to evaluate 1-year GVHD-Free Relapse-Free Survival (GRFS) using 25 mg/kg of PTCy administered on days +3 and +4, in combination with tacrolimus and mycophenolate mofetil (MMF).

The study builds on previous research that has shown the effectiveness of PTCy in preventing GVHD in various transplant settings, including haploidentical and matched unrelated donors. Lower doses of PTCy, such as 25 mg/kg, have been shown to be effective in other settings with reduced toxicity compared to the standard 50 mg/kg dose, and this study will assess whether the same holds true for peripheral blood stem cell transplants.

The findings from this trial will help determine the optimal dosing strategy for PTCy in GVHD prophylaxis, with the potential to improve patient outcomes by minimizing toxicity while maintaining efficacy.

Being tested
Cyclophosphamide (primary intervention for GVHD prophylaxis)
Medical subject headings
Graft vs Host Disease, Hematologic Neoplasms

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Cyclophosphamide (primary intervention for GVHD prophylaxis)Drug

    Also called Tacrolimus (part of the GVHD prophylaxis regimen), Mycophenolate mofetil (MMF) (part of the GVHD prophylaxis regimen)

    This study evaluates the use of low-dose (25 mg/kg) post-transplant cyclophosphamide (PTCy) for prophylaxis of Graft-versus-Host Disease (GVHD) following allogeneic stem cell transplantation. The intervention involves administering PTCy on days +3 and +4 post-transplant, in combination with tacrolimus and mycophenolate mofetil (MMF) for GVHD prevention. The goal is to assess the safety and efficacy of this regimen in patients undergoing reduced-intensity or non-myeloablative conditioning using peripheral blood stem cells from matched sibling, matched unrelated, and haploidentical donors

Study groups in NCT06926595
Study groupRoleWhat they receive
Low-Dose PTCy for GVHD ProphylaxisExperimentalParticipants in this single-arm study will receive low-dose (25 mg/kg) post-transplant cyclophosphamide (PTCy) on days +3 and +4 following allogeneic hematopoietic stem cell transplantation. This will be administered in combination with tacrolimus and mycophenolate mofetil (MMF) for graft-versus-host disease (GVHD) prophylaxis. The study includes patients receiving transplants from matched sibling, matched unrelated, single allelic mismatched unrelated, and haploidentical donors following reduced-intensity or non-myeloablative conditioning.
Receives: Drug: Cyclophosphamide (primary intervention for GVHD prophylaxis)

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Number of Subjects Without Grade III/IV Acute Graft-Versus-Host Disease (GVHD) at 1 Year

    The number of subjects without Grade III/IV acute graft-versus-host disease (GVHD) at one year following allogeneic stem cell transplantation, assessed using the Modified Glucksberg Criteria (Grade III: severe organ involvement, e.g., skin stage 3-4, liver or gut stage 2-3; Grade IV: life-threatening dysfunction, e.g., skin, liver, or gut stage 4).

    Measured: 1 year post-transplant

  2. Number of Subjects Without Chronic Graft-Versus-Host Disease (GVHD) Requiring Systemic Treatment at 1 Year

    The number of subjects without chronic graft-versus-host disease (GVHD) requiring systemic treatment (e.g., corticosteroids or immunosuppressive therapy) at one year following allogeneic stem cell transplantation with low-dose post-transplant cyclophosphamide (25 mg/kg), assessed per the NIH Consensus Criteria for chronic GVHD.

    Measured: 1 year post-transplant

  3. Number of Subjects Without Relapse or Disease Progression at 1 Year

    The number of subjects without relapse or disease progression at one year following allogeneic stem cell transplantation, defined as the reappearance of the underlying disease or worsening of disease burden, assessed by standard clinical and laboratory measures (e.g., bone marrow biopsy, or disease-specific markers such as minimal residual disease [MRD] testing) per the study protocol.

    Measured: 1 year post-transplant

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted13 Apr 2025
  2. Study start9 Mar 2026
  3. Primary completion1 Nov 2030 (estimated)
  4. Study completion1 Nov 2031 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Model description
This is a single-arm, open-label, Phase 2 clinical trial. All participants will receive the same intervention, which is low-dose (25 mg/kg) post-transplant cyclophosphamide (PTCy) for GVHD prophylaxis, in combination with tacrolimus and mycophenolate mofetil (MMF). The study will assess the safety and efficacy of this regimen in patients undergoing allogeneic stem cell transplantation using peripheral blood stem cells from matched sibling, matched unrelated, and haploidentical donors, following reduced-intensity or non-myeloablative conditioning.
Masking
None (open label)
Enrolment
41 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT06926595
Sponsor's protocol ID
PSCI-24-047
Other IDs
PSCI-24-047
Acronym
GVHD-PTCy
Status last verified
Sep 2025
First submitted
10 Apr 2025
Last updated
3 Apr 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
No: Study results will be published in a peer-reviewed journal.

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing Cyclophosphamide (primary intervention for GVHD prophylaxis) in people with Graft-versus-Host Disease (GVHD) and Hematologic Malignancies, run by Milton S. Hershey Medical Center at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 18 inclusion and 11 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 3 Apr 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Crystal Sowers (7175315471, psci-cto@pennstatehealth.psu.edu), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Number of Subjects Without Grade III/IV Acute Graft-Versus-Host Disease (GVHD) at 1 Year (time frame: 1 year post-transplant). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 3 Apr 2026.

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