[Successful hematologic reconstitution using CD34+ cells positively selected from cryopreserved autologous peripheral blood stem cells in a patient with malignant lymphoma].
Clinical use of CD34+ cells positively selected from cryopreserved peripheral blood stem cells (PBSC) has been limited, and there have been only a few reports of this procedure, mainly because clump formation decreases the proportion of CD34+ cells that can be recovered. A 49-year-old Japanese woman with non-Hodgkin's lymphoma (NHL) (follicular mixed, B cell, stage IVA) was treated with seven cycles of conventional chemotherapy and achieved partial remission. During hematopoietic recovery after the seventh course of chemotherapy, PBSC were harvested by continuous leukapheresis and cryopreserved. However, clonal rearrangement of the immunoglobulin heavy chain gene was detected in the PBSC by Southern blot analysis. After high-dose chemotherapy, CD34+ cells were positively immunoselected from the cryopreserved PBSC and infused into the patient at 1.97 x 10(6)/kg. The overall purity and recovery rate of the CD34+ cells were 72.2% and 65.0%, respectively. There were no severe adverse effects after PBSC transplantation, and the time required for recovery of neutrophils to over 0. 5 x 10(9)/l and platelets to over 50 x 10(9)/l was 11 and 21 days, respectively. Transplantation of CD34+ cells positively selected from cryopreserved PBSC provides engraftment ability similar to that of unmanipulated PBSC.
Endo
T
T
Department of Internal Medicine II, Hokkaido University School of Medicine.
Sawada
K
K
Fujimoto
K
K
Yamamoto
S
S
Takashima
H
H
Haseyama
Y
Y
Nishio
M
M
Koizumi
K
K
Koike
T
T
D018952:Antigens, CD34 / Q000032:analysis*; D001804:Blood Transfusion, Autologous; D002469:Cell Separation / Q000379:methods; D015925:Cryopreservation; D005260:Female; D018380:Hematopoietic Stem Cell Transplantation / Q000379:methods*; D006801:Humans; D007937:Leukapheresis; D008223:Lymphoma / Q000628:therapy*; D008875:Middle Aged
D018952:Antigens, CD34