Interleukin-3 promotes proliferation and differentiation of human hematopoietic stem cells but reduces their repopulation potential in NOD/SCID mice

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Item Type:	Article
Title:	Interleukin-3 promotes proliferation and differentiation of human hematopoietic stem cells but reduces their repopulation potential in NOD/SCID mice
Creators Name:	Nitsche, A., Junghahn, I., Thulke, S., Aumann, J., Radonic, A., Fichtner, I. and Siegert, W.
Abstract:	In the present study we explored systematically the influence of human interleukin-3 (IL-3) on the cord blood (CB) cell-derived production of human hematopoietic cells in the bone marrow, blood, and spleen of chimeric nonobese/severe combined immunodeficient mice ((NOD/SCID) mice. CB mononuclear cells and MACS-enriched CB CD34+ cells were injected into irradiated NOD/SCID mice. The mice were additionally transplanted with a stably transfected rat fibroblast cell line expressing the human IL-3 gene (Rat-IL-3) constitutively, or with the nontransfected rat fibroblast cell line as a control (Rat-1). Rat-IL-3 mice displayed a higher engraftment of human hematopoietic cells in bone marrow, spleen, and peripheral blood compared with mice with Rat-1 cotransplantation. When we transplanted their total bone marrow cell population into secondary mice, surprisingly, mice transplanted with bone marrow cells from Rat-1 mice displayed a higher proportion of human hematopoietic cells compared with Rat-IL-3 mice. As expected, bone marrow cultures (BMCs) from Rat-IL-3 mice contained a higher proportion of human cells than Rat-1 bone marrow cells. However, when BMCs were passaged to new flasks, we observed a higher proportion of human cells in BMCs from Rat-1 mice compared with BMCs from Rat-IL-3 mice. IL-3 promotes the proliferation and differentiation of hematopoietic stem cells in chimeric bone marrow. In addition, IL-3 may play a role in the depletion of hematopoietic stem cells in chimeric bone marrow. In the absence of IL-3, the hematopoietic stem cells may remain in a quiescent state and proliferation can be induced by stimuli, including secondary transplantation or cell passage.
Keywords:	Engraftment, Hematopoietic, Immunochecmistry, Interleukin 3, NOD SCID Mice, Stem Cell
Source:	Stem Cells
ISSN:	1066-5099
Publisher:	AlphaMed Press
Volume:	21
Number:	2
Page Range:	236-244
Date:	March 2003
Official Publication:	https://doi.org/10.1634/stemcells.21-2-236
PubMed:	View item in PubMed

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