Pluripotent and myeloid-committed CD34+ subsets in hematopoietic stem cell allografts.

TY - JOUR

T1 - Pluripotent and myeloid-committed CD34+ subsets in hematopoietic stem cell allografts.

AU - Theilgaard-Mönch, K

AU - Raaschou-Jensen, K

AU - Schjødt, K

AU - Heilmann, C

AU - Vindeløv, L

AU - Jacobsen, N

AU - Dickmeiss, E

N1 - Keywords: Antigens, CD; Antigens, CD34; Blood Cell Count; Blood Donors; Bone Marrow Cells; Cell Lineage; Colony-Forming Units Assay; Flow Cytometry; Graft Survival; Granulocyte Colony-Stimulating Factor; Hematopoietic Stem Cell Mobilization; Hematopoietic Stem Cells; Humans; Leukapheresis; Myeloid Cells; Peripheral Blood Stem Cell Transplantation; Pluripotent Stem Cells; Transplantation, Homologous

PY - 2003

Y1 - 2003

N2 - The present study compared the contents of pluripotent and lineage-committed hematopoietic progenitor cells (HPCs) in various types of allografts. Bone marrow (BM) allografts and single leukapheresis products (LPs) collected from G-CSF-mobilized donors contained similar amounts of pluripotent HPCs (CD34(+)CD38(-)) and total CD34(+) cells. However, the content of late-myeloid HPCs (CD34(+)CD33(+)CD15(+)) were significantly higher in BM grafts compared to LPs (P>0.02), whereas the contents of early-myeloid HPCs (CD34(+)CD33(+)CD15-) were 2.5-fold higher in LPs (P<0.03). In comparison to grafts from adult donors, cord blood (CB) grafts contained 26-65-fold lower amounts of early-myeloid HPCs (P<0.001), but only 8-12-fold lower contents of pluripotent HPCs (P<0.04). Additional findings demonstrated that among all tested parameters the numbers of early-myeloid HPCs were the most accurate measure of the total colony-forming cell (CFC) numbers in allografts. Hence, the earlier engraftment observed after transplantation of LPs compared to BM grafts might be explained by the higher content of early-myeloid HPCs/CFCs in LPs. Moreover, the slow engraftment following CB transplantation might not be affected essentially by the low number of myeloid HPCs, but rather by pluripotent HPCs. Finally, this study reports a new gating strategy for the enumeration of pluripotent CD34(+)CD38(-) subsets.

AB - The present study compared the contents of pluripotent and lineage-committed hematopoietic progenitor cells (HPCs) in various types of allografts. Bone marrow (BM) allografts and single leukapheresis products (LPs) collected from G-CSF-mobilized donors contained similar amounts of pluripotent HPCs (CD34(+)CD38(-)) and total CD34(+) cells. However, the content of late-myeloid HPCs (CD34(+)CD33(+)CD15(+)) were significantly higher in BM grafts compared to LPs (P>0.02), whereas the contents of early-myeloid HPCs (CD34(+)CD33(+)CD15-) were 2.5-fold higher in LPs (P<0.03). In comparison to grafts from adult donors, cord blood (CB) grafts contained 26-65-fold lower amounts of early-myeloid HPCs (P<0.001), but only 8-12-fold lower contents of pluripotent HPCs (P<0.04). Additional findings demonstrated that among all tested parameters the numbers of early-myeloid HPCs were the most accurate measure of the total colony-forming cell (CFC) numbers in allografts. Hence, the earlier engraftment observed after transplantation of LPs compared to BM grafts might be explained by the higher content of early-myeloid HPCs/CFCs in LPs. Moreover, the slow engraftment following CB transplantation might not be affected essentially by the low number of myeloid HPCs, but rather by pluripotent HPCs. Finally, this study reports a new gating strategy for the enumeration of pluripotent CD34(+)CD38(-) subsets.

U2 - 10.1038/sj.bmt.1704297

DO - 10.1038/sj.bmt.1704297

M3 - Journal article

C2 - 14647266

SN - 0268-3369

VL - 32

SP - 1125

EP - 1133

JO - Bone Marrow Transplantation

JF - Bone Marrow Transplantation

IS - 12

ER -