Phenotypic characteristics of cord blood hemopoietic cells

Bone marrow transplantation is limited due to the lack of HLA-matched donors and to the frequent occurrence of GvHD. Hemopoietic transplants using cord blood cells are being increasingly used in pediatric patients. In this study, the immunophenotypic characteristics of cord blood cells have been investigated by one or two-color flow cytometric analysis. The CB cells were characterized by a low proportion of CD3 + T-cells, increased CD4/CD8 and CD45RA/CD45RO ratios, minimal expression of HLA-DR, increased proportion of CD5CD19 double positive B-cells, while CD3 −CD8 + and CD3 −CD7 + subsets, not usually found in adult PB, were detected. These data reflect the immaturity of CB cells as assessed by immunophenotypic analysis suggesting that it could be a valuable alternative source of transplantable hematopoietic progenitor cells and might alleviate some of the problems associated with bone marrow or peripheral blood transplantation.