British Medical Bulletin 43:203-216 (1987)
© 1987 The British Council
research-article |
Transplantation of hematopoietic stem cells (HSC)
Fred Hutchinson Cancer Research Centre, Pugeof Sound Blood Centre, and the Department of Medicine, University of Washington Seattle, Washington, USA
Abstract
HLA compatibility is a significant factor in clinical allogeneic marrow transplantation. Disparity for HLA determinants, either class I A locus or B locus products, or class II Dw clusters, increases the rate of onset and overall incidence of clinically significant GVHD, and also increases the incidence of graft failure. The risk of graft failure and GVHD are proportional to the degree of HLA disparity. From the data available, there is a trend for class I HLA-A or B locus disparity to cause more GVHD than disparity for class II HLA-Dw determinants. This apparent difference, however, is not significant. Although an increasing number of allogeneic marrow transplants from HLA identical unrelated volunteer donors are being performed, the risk of graft rejection and significant GVHD are not known. There have been successful transplants from unrelated donors; however, the GVHD observed appears to be relatively active. A major issue, to be resolved before the identification of unrelated volunteer donors can be feasible and the outcome of unrelated donor transplants is reasonably successful, concerns the question of what the minimal requirements for unrelated donor/recipient HLA compatibility will be.