Abstract: A method is described for increasing the engraftment efficiency of S/G2/M phase stem cells, which involves treating a recipient with the stromal cell-derived factor-1 (SDF-1) antagonist SDF-1G2 prior to delivery of the cells to said recipient. Further, a method of transplanting proliferating or S/G2/M phase stem cells is described, comprising the steps of: (a) obtaining stem cells; (b) inducing stem cells ex vivo to proliferate or enter S/G2/M phase; (c) treating the recipient with the SDF-1 antagonist SDF-1G2; and (d) providing the stem cells to the recipient.

Abstract: The present invention relates to an improved method that permits the differential isolation of mouse mammary stem cells and colony forming cells (CFCs). The method involves depletion of non-epithelial cells from freshly dissociated mouse mammary tissue by incubation with an antibody composition containing antibodies specific for CD45, Ter119, CD35 and optionally CD140a. After formation of conjugates between the non-epithelial mammary cells and the antibodies specific for CD45, Ter119, CD35 and optionally CD140a, the cell conjugates are removed and the remaining epithelial cells are then incubated with an antibody composition containing antibodies specific for CD24 and CD49f or CD24 and CD14. After formation of conjugates between the epithelial cells and the antibodies specific for CD24 and CD49f or CD24 and CD14, the mouse mammary stem and the luminal-restricted CFC cells can be differentially isolated.

Abstract: The present invention relates to an improved method that permits the differential isolation of mouse mammary stem cells and colony forming cells (CFCs). The method involves depletion of non-epithelial cells from freshly dissociated mouse mammary tissue by incubation with an antibody composition containing antibodies specific for CD45, Ter119, CD35 and optionally CD140a. After formation of conjugates between the non-epithelial mammary cells and the antibodies specific for CD45, Ter119, CD35 and optionally CD140a, the cell conjugates are removed and the remaining epithelial cells are then incubated with an antibody composition containing antibodies specific for CD24 and CD49f. After formation of conjugates between the epithelial cells and the antibodies specific for CD24 and CD49f, the mouse mammary stem and the luminal-restricted CFC cells can be differentially isolated. The invention also relates to kits for carrying out this method and to the cell preparations prepared by this method.

Abstract: In accordance with various aspects of the invention, CXCR4 antagonists may be used to treat hematopoietic cells, such as progenitor or stem cells, to promote the rate of cellular multiplication, self-renewal, proliferation or expansion. CXCR4 antagonists may be used therapeutically to stimulate hematopoietic stem/progenitor cell multiplication/self-renewal.