title: Ex vivo culture of human cord blood hematopoietic stem/progenitor cells adversely influences their distribution to other bone marrow compartments after intra-bone marrow transplantation.
abstract: Intra-bone marrow injection is a novel strategy for hematopoietic stem cell transplantation. Here, we investigated whether ex vivo culture of cord blood hematopoietic stem/progenitor cells influences their reconstitution in bone marrow after intra-bone marrow transplantation. Freshly isolated AC133(+) cells or cells derived from AC133(+) cells cultured with cytokines (stem cell factor, flt-3 ligand, and thrombopoietin) for 5 days were injected into the bone marrow of the left tibia in irradiated NOD/SCID mice. In the bone marrow of the injected left tibia, the engraftment levels of human CD45(+) cells at 6 weeks after transplantation did not differ considerably between transplantation of noncultured and cytokine-cultured cells. However, the migration and distribution of transplanted cells to the bone marrow of other, noninjected bones were extremely reduced for cytokine-treated cells compared with noncultured cells. Similar findings were observed for engraftment of CD34(+) cells. Administration of granulocyte colony-stimulating factor to mice after transplantation induced the migration of cytokine-cultured cells to the bone marrow of previously aspirated bone but not to other intact bones. These data suggest that ex vivo manipulation of hematopoietic progenitor/stem cells significantly affects their migration properties to other bone marrow compartments after intra-bone marrow transplantation. Our data raise a caution for future clinical applications of the intra-bone marrow transplantation method using ex vivo-manipulated hematopoietic stem cells.
authors.affiliation: Department of Hematology and Oncology, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu, Mie 514-8507, Japan.
authors.forename: Kentaro
authors.initials: K
authors.lastname: Yamamura
authors.forename: Kohshi
authors.initials: K
authors.lastname: Ohishi
authors.forename: Masahiro
authors.initials: M
authors.lastname: Masuya
authors.forename: Eri
authors.initials: E
authors.lastname: Miyata
authors.forename: Yuka
authors.initials: Y
authors.lastname: Sugimoto
authors.forename: Shiho
authors.initials: S
authors.lastname: Nakamura
authors.forename: Atsushi
authors.initials: A
authors.lastname: Fujieda
authors.forename: Hiroto
authors.initials: H
authors.lastname: Araki
authors.forename: Naoyuki
authors.initials: N
authors.lastname: Katayama
mesh_terms: D000071916:AC133 Antigen; D000818:Animals; D015703:Antigens, CD / Q000378:metabolism; D001854:Bone Marrow Cells / Q000166:cytology / Q000378:metabolism; D016026:Bone Marrow Transplantation; D018929:Cell Culture Techniques; D002465:Cell Movement; D036101:Cord Blood Stem Cell Transplantation; D006023:Glycoproteins / Q000378:metabolism; D006085:Graft Survival; D018380:Hematopoietic Stem Cell Transplantation; D006412:Hematopoietic Stem Cells / Q000166:cytology* / Q000378:metabolism; D006801:Humans; D051379:Mice; D016688:Mice, Inbred NOD; D016513:Mice, SCID; D010455:Peptides / Q000378:metabolism; D014183:Transplantation, Heterologous
chemical_list: D000071916:AC133 Antigen; D015703:Antigens, CD; D006023:Glycoproteins; C000606023:PROM1 protein, human; D010455:Peptides; C000606024:Prom1 protein, mouse