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Condition Guide

New Treatments & Clinical Trials for Bone Marrow Transplantation

Last updated June 2026Data from ClinicalTrials.gov310 active trials
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Bone marrow transplantation replaces damaged or diseased marrow with healthy stem cells, either from the patient (autologous) or a donor (allogeneic). It's used to treat blood cancers like leukemia and lymphoma, sickle cell disease, immune deficiencies, and other conditions where the marrow fails. Outcomes have improved dramatically as doctors have learned to prevent rejection and infection.

What's actually going on in research

Trials are testing ways to make transplant safer and more accessible — expanding donor pools with haploidentical (half-matched) family donors, reducing graft-versus-host disease with drugs like ruxolitinib and abatacept, and using gene-edited cells to correct genetic diseases. Researchers are also studying reduced-intensity conditioning regimens that require less chemotherapy before transplant.

Haploidentical transplant

New techniques allow half-matched family members to donate, which expands options for patients without perfect matches. Studies show outcomes now approach those of matched donors.

GVHD prevention

Drugs like abatacept and post-transplant cyclophosphamide are reducing rates of graft-versus-host disease, where donor immune cells attack the recipient. This makes transplant tolerable for more people.

Gene-edited transplant

Trials are testing whether editing a patient's own stem cells can cure sickle cell disease and beta-thalassemia without needing a donor. Early results show people living free of transfusions and pain crises.

What to know before you search

Eligibility depends on the underlying disease, age, organ function, donor availability, and whether prior treatments have failed.

What types of trials are currently open

  • Conditioning regimen trialsTesting lower doses of chemotherapy or radiation before transplant to reduce side effects while still clearing space for new marrow.
  • GVHD prevention trialsTesting drugs and cell therapies given before or after transplant to prevent donor immune cells from attacking the recipient's body.
  • Donor matching trialsStudies of transplants using half-matched family donors, cord blood, or other alternative sources when no perfect match exists.
  • Gene therapy trialsTesting whether correcting a patient's own stem cells can replace the need for a donor transplant in genetic diseases.
  • Supportive care studiesResearch on preventing infections, managing side effects, and improving quality of life during and after transplant.

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