NCT07228624

Ruxolitinib Before, During and After Hematopoietic Cell Transplant in Older Patients With Myelofibrosis and Myelodysplastic Syndrome/Myeloproliferative Neoplasm Overlap Syndromes

Peri-Hematopoietic Cell Transplantation Ruxolitinib in Patients With Myelofibrosis and Myelodysplastic Syndrome/Myeloproliferative Neoplasm Overlap Syndromes

• Status: Recruiting
• Phase: Phase 2
• Study type: Interventional
• Enrollment: 50 (estimated)
• Sponsor: Fred Hutchinson Cancer Center · Academic / Other
• Sex: All
• Age: 18 Years – 75 Years
• Healthy volunteers: Not accepted

Summary

This phase II trial tests the effect of adding ruxolitinib to standard graft versus host disease (GVHD) prevention in treating older patients with myelofibrosis (MF) or myelodysplastic syndrome/myeloproliferative neoplasm (MDS/MPN) overlap syndromes before, during, and after a donor (allogeneic) hematopoietic cell transplant (HCT). Allogeneic HCT is a procedure in which a person receives blood-forming stem cells (cells from which all blood cells develop) from a genetically similar, but not identical donor. Giving chemotherapy, such as cytoxan and busulfan or fludarabine and melphalan, before a donor transplant helps kill cancer cells in the body and helps make room in the patient's bone marrow for new blood-forming cells (stem cells) to grow. However, sometimes the transplanted cells from a donor can attack the body's normal cells (called GVHD). Giving standard prevention (prophylaxis) therapies, such as tacrolimus and methotrexate, after the transplant may stop this from happening. Methotrexate, a type of antifolate, is in a class of medications called antimetabolites. Methotrexate stops cells from using folic acid to make deoxyribonucleic acid and may kill cancer cells. Tacrolimus is used to help reduce the risk of rejection by the body of organ and bone marrow transplants. Ruxolitinib, a type of Janus-associated kinase (JAK) inhibitor, blocks a protein called JAK, which may help keep abnormal blood cells or cancer cells from growing. It may also lower the body's immune response and prevent the development of GVHD. Giving ruxolitinib before, during and after allogeneic HCT in addition to standard GVHD prophylaxis may be safe, tolerable and effective in preventing GVHD and improving outcomes in older patients with MF or MDS/MPN overlap syndrome.

Detailed description

OUTLINE: PART 1: Patients receive ruxolitinib or an alternate JAK-inhibitor for at least 8 weeks prior to the start of HCT conditioning. Starting on day -4, patients receive 5 mg of ruxolitinib orally (PO) twice daily (BID) for 12 months then PO once daily (QD) until 18 months. Patients receive high intensity conditioning with cyclophosphamide intravenously (IV) on days -7 and -6 and busulfan IV over 3 hours on days -5 to -2 or reduced intensity conditioning with fludarabine IV over 30 minutes on days -6 to -2 and melphalan IV over 15-30 minutes on days -3 and -2. PART 2: Patients receive stem cells infusion on day 0. Starting on day -3, patients receive tacrolimus IV over 1-2 hours or PO every 12 hours for at least 100 days. Patients also receive methotrexate IV on days 1, 3, 6, and 11. Additionally, patients undergo urine sample collection, echocardiography, chest computed tomography (CT) and pulmonary function testing prior to conditioning and blood sample collection, bone marrow biopsy and aspiration and spleen ultrasound or CT at multiple time points before and after transplant. After completion of study treatment, patients are followed at days 28, 100, 180, and at 9 months, 1 year, 18 months and 2 years.

Conditions

• Myelodysplastic/Myeloproliferative Neoplasm
• Primary Myelofibrosis
• Secondary Myelofibrosis

Interventions

Type	Name	Description
DRUG	Ruxolitinib	Given PO
PROCEDURE	Allogeneic Hematopoietic Stem Cell Transplantation	Given infusion
DRUG	Busulfan	Given IV
PROCEDURE	Computed Tomography	Undergo CT
DRUG	Cyclophosphamide	Given IV
PROCEDURE	Echocardiography Test	Undergo echocardiography
DRUG	Fludarabine	Given IV
DRUG	JAK Inhibitor	Given JAK inhibitor
DRUG	Melphalan	Given IV
DRUG	Methotrexate	Given IV
DRUG	Tacrolimus	Given IV or PO
PROCEDURE	Biospecimen Collection	Undergo urine and blood sample collection
PROCEDURE	Bone Marrow Aspiration	Undergo bone marrow biopsy and aspiration
PROCEDURE	Bone Marrow Biopsy	Undergo bone marrow biopsy and aspiration

Timeline

• Start date: 2026-02-04
• Primary completion: 2030-09-01
• Completion: 2030-09-01
• First posted: 2025-11-14
• Last updated: 2026-02-19

Locations

1 site across 1 country: United States

Regulatory

• FDA-regulated drug study