Rapid and automated processing of bone marrow grafts without Ficoll density gradient for transplantation of cryopreserved autologous or ABO-incompatible allogeneic bone marrow.
The growing number of BMTs has increased interest in safe and standardized in vitro bone marrow processing techniques. We describe our experience with a rapid automated method for the isolation of mononuclear cells (MNC) from large volumes of bone marrow using a Fenwal CS-3000 cell separator without employing density gradient materials. Forty bone marrow harvests with a mean volume of 1650 +/- 307 ml were processed. A mean of 75 +/- 34% (50 percentile range 54-94%) of the original MNCs were recovered in a volume of 200 ml with only 4 +/- 2% of the starting red blood cells (RBC). Removal of granulocytes, immature myeloid precursors and platelets proved to be sufficient to permit safe cryopreservation and successful autologous BMT (n = 25). Allogeneic BMT (n = 14, including three major ABO-incompatible) could be performed without additional manipulation. In both groups of patients timely and stable engraftment comparable to historical controls receiving Ficoll gradient processed autologous (n = 17) or unprocessed allogeneic BMT (n = 54) was observed. Moreover, 70 +/- 14% of the RBC could be recovered from the grafts. They were used for autologous RBC support of donors, rendering unnecessary autologous blood pre-donations.
Schanz
U
U
Department of Internal Medicine, University Hospital, Zürich, Switzerland.
Gmür
J
J
D000017:ABO Blood-Group System; D001803:Blood Transfusion; D001854:Bone Marrow Cells; D016465:Bone Marrow Purging / Q000295:instrumentation / Q000379:methods*; D016026:Bone Marrow Transplantation / Q000379:methods*; D002469:Cell Separation / Q000295:instrumentation / Q000379:methods; D002499:Centrifugation, Density Gradient; D015925:Cryopreservation; D017707:Erythrocyte Transfusion; D005069:Evaluation Studies as Topic; D005362:Ficoll; D006801:Humans; D014182:Transplantation, Autologous; D014184:Transplantation, Homologous
D000017:ABO Blood-Group System; D005362:Ficoll