title: Direct bone marrow HSC transplantation enhances local engraftment at the expense of systemic engraftment in NSG mice.
abstract: Direct bone marrow (BM) injection has been proposed as a strategy to bypass homing inefficiencies associated with intravenous (IV) hematopoietic stem cell (HSC) transplantation. Despite physical delivery into the BM cavity, many donor cells are rapidly redistributed by vascular perfusion, perhaps compromising efficacy. Anchoring donor cells to 3-dimensional (3D) multicellular spheroids, formed from mesenchymal stem/stromal cells (MSC) might improve direct BM transplantation. To test this hypothesis, relevant combinations of human umbilical cord blood-derived CD34(+) cells and BM-derived MSC were transplanted into NOD/SCID gamma (NSG) mice using either IV or intrafemoral (IF) routes. IF transplantation resulted in higher human CD45(+) and CD34(+) cell engraftment within injected femurs relative to distal femurs regardless of cell combination, but did not improve overall CD45(+) engraftment at 8 weeks. Analysis within individual mice revealed that despite engraftment reaching near saturation within the injected femur, engraftment at distal hematopoietic sites including peripheral blood, spleen and non-injected femur, could be poor. Our data suggest that the retention of human HSC within the BM following direct BM injection enhances local chimerism at the expense of systemic chimerism in this xenogeneic model.
authors.affiliation: Queensland University of Technology (QUT) at the Translational Research Institute (TRI), 37 Kent Street, Brisbane, Queensland, Australia 4102.
authors.forename: Kathryn
authors.initials: K
authors.lastname: Futrega
authors.affiliation: Queensland University of Technology (QUT) at the Translational Research Institute (TRI), 37 Kent Street, Brisbane, Queensland, Australia 4102.
authors.forename: William B
authors.initials: WB
authors.lastname: Lott
authors.affiliation: Queensland University of Technology (QUT) at the Translational Research Institute (TRI), 37 Kent Street, Brisbane, Queensland, Australia 4102.|Mater Medical Research - University of Queensland at the Translational Research Institute (TRI), 37 Kent Street, Brisbane, Queensland, Australia 4102.
authors.forename: Michael R
authors.initials: MR
authors.lastname: Doran
mesh_terms: D000818:Animals; D018952:Antigens, CD34 / Q000032:analysis; D001853:Bone Marrow / Q000502:physiology*; D046528:Chimerism; D018380:Hematopoietic Stem Cell Transplantation / Q000379:methods*; D006412:Hematopoietic Stem Cells / Q000502:physiology*; D006801:Humans; D017493:Leukocyte Common Antigens / Q000032:analysis; D016688:Mice, Inbred NOD; D016513:Mice, SCID; D018874:Spheroids, Cellular / Q000502:physiology*; D016896:Treatment Outcome
chemical_list: D018952:Antigens, CD34; D017493:Leukocyte Common Antigens; C516769:PTPRC protein, human