Related Experiment Videos
Partially mismatched blood cell transplants for high-risk hematologic malignancy
J A Russell1, S Desai, B Herbut
1Alberta Bone Marrow Transplant Program, Foothills Hospital, Calgary, Edmonton, Canada.
Bone Marrow Transplantation
|May 1, 1997
Summary
Allogeneic blood cell transplants (BCT) from partially mismatched family donors increase graft-versus-host disease (GVHD) risk but offer comparable survival to matched BCT for high-risk hematologic malignancy.
Area of Science:
- Hematology
- Transplantation Immunology
Background:
- High-risk hematologic malignancies often require allogeneic stem cell transplantation.
- Partially mismatched family donors are an alternative when fully matched donors are unavailable.
- Granulocyte-colony stimulating factor (G-CSF) mobilizes progenitor cells for blood cell transplants (BCT).
Purpose of the Study:
- To compare outcomes of BCT from partially mismatched family donors versus fully matched donors in patients with high-risk hematologic malignancy.
- To evaluate the impact of donor mismatching on engraftment, graft-versus-host disease (GVHD), and survival.
Main Methods:
- Retrospective comparison of 11 patients receiving BCT from partially mismatched family donors and 22 patients receiving BCT from fully matched donors.
- Donors were mismatched by up to one antigen in the graft-versus-host (GVH) direction and up to three antigens in the rejection direction.
- Outcomes assessed included engraftment time, acute and chronic GVHD incidence, relapse rates, and disease-free survival.
Main Results:
- Median granulocyte engraftment was longer in the mismatched group (21.5 days) compared to the matched group (16 days) (P=0.01).
- Incidence of grade II-IV acute GVHD was significantly higher in the mismatched group (73%) versus the matched group (28%) (P=0.001).
- Chronic GVHD incidence was 100% in the mismatched group versus 78% in the matched group (P=0.01).
- Disease-free survival at 1 year was similar: 55% for mismatched and 50% for matched BCT.
Conclusions:
- Allogeneic BCT from partially mismatched family donors is associated with a significantly higher risk of acute and chronic graft-versus-host disease.
- Despite increased GVHD, disease-free survival at one year appears comparable between partially mismatched and fully matched BCT recipients.
- Partially mismatched family donors represent a viable option for allogeneic BCT when matched donors are unavailable, necessitating careful GVHD management.