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Administration of Flk2/Flt3 ligand induces expansion of human high-proliferative potential colony-forming cells in the SCID-hu mouse
Administration of Flk2/Flt3 ligand induces expansion of human high-proliferative potential colony-forming cells in the SCID-hu mouse EXPERIMENTAL HEMATOLOGY Namikawa, R., Muench, M. O., Firpo, M. T., Humeau, L., Xu, Y. M., Menon, S., Roncarolo, M. G. 1999; 27 (6): 1029-1037Abstract
The effects of Flk2/Flt3 ligand (FL) administration on human hematopoiesis were investigated using SCID-hu mice transplanted with human fetal bone fragments. Treatment with recombinant human FL induced significant increases in the frequencies of the high-proliferative potential colony-forming cells and low-proliferative potential colony-forming cells in steady-state human bone marrow. FL also promoted the expansion of high-proliferative potential colony-forming cells and low-proliferative potential colony-forming cells in the human bone marrow during the recovery phase after irradiation, which was evident in increases in the frequencies as well as in the absolute numbers of colony-forming cells. Furthermore, higher percentages of CD33+ CD15- cells were found in the marrows treated with FL as compared to that of controls, indicating that FL hastened the recovery of at least some aspect of myelopoiesis after irradiation. These results indicate that FL induces the expansion of primitive hematopoietic progenitor cells in vivo and, therefore, may be useful in treating patients to promote an early hematopoietic recovery after cytoablative therapies.
View details for Web of Science ID 000080830900008
View details for PubMedID 10378892