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Jacobsen RN, Nowlan B, Brunck ME, Barbier V, Winkler IG, Levesque JP. Fms-like tyrosine kinase 3 (Flt3) ligand depletes erythroid island macrophages and blocks medullar erythropoiesis in the mouse. Exp Hematol 2015; 44:207-12.e4. [PMID: 26607596 DOI: 10.1016/j.exphem.2015.11.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 10/15/2015] [Accepted: 11/05/2015] [Indexed: 01/20/2023]
Abstract
The cytokines granulocyte colony-stimulating factor (G-CSF) and Flt3 ligand (Flt3-L) mobilize hematopoietic stem and progenitor cells into the peripheral blood of primates, humans, and mice. We recently reported that G-CSF administration causes a transient blockade of medullar erythropoiesis by suppressing erythroblastic island (EI) macrophages in the bone marrow. In the study described here, we investigated the effect of mobilizing doses of Flt3-L on erythropoiesis in mice in vivo. Similar to G-CSF, Flt3-L caused whitening of the bone marrow with significant reduction in the numbers of EI macrophages and erythroblasts. This was compensated by an increase in the numbers of EI macrophages and erythroblasts in the spleen. However, unlike G-CSF, Flt3-L had an indirect effect on EI macrophages, as it was not detected at the surface of EI macrophages or erythroid progenitors.
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Affiliation(s)
- Rebecca N Jacobsen
- Stem Cell Biology Group, Mater Research Institute, University of Queensland, Woolloongabba, Queensland, Australia; School of Medicine, University of Queensland, Herston, Queensland, Australia
| | - Bianca Nowlan
- Stem Cell Biology Group, Mater Research Institute, University of Queensland, Woolloongabba, Queensland, Australia
| | - Marion E Brunck
- Stem Cell Biology Group, Mater Research Institute, University of Queensland, Woolloongabba, Queensland, Australia
| | - Valerie Barbier
- Stem Cells and Cancer Group, Mater Research Institute, University of Queensland, Woolloongabba, Queensland, Australia
| | - Ingrid G Winkler
- Stem Cells and Cancer Group, Mater Research Institute, University of Queensland, Woolloongabba, Queensland, Australia
| | - Jean-Pierre Levesque
- Stem Cell Biology Group, Mater Research Institute, University of Queensland, Woolloongabba, Queensland, Australia; School of Medicine, University of Queensland, Herston, Queensland, Australia.
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Jacobsen RN, Forristal CE, Raggatt LJ, Nowlan B, Barbier V, Kaur S, van Rooijen N, Winkler IG, Pettit AR, Levesque JP. Mobilization with granulocyte colony-stimulating factor blocks medullar erythropoiesis by depleting F4/80+VCAM1+CD169+ER-HR3+Ly6G+ erythroid island macrophages in the mouse. Exp Hematol 2014; 42:547-61.e4. [DOI: 10.1016/j.exphem.2014.03.009] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Revised: 03/25/2014] [Accepted: 03/31/2014] [Indexed: 01/05/2023]
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Winkler IG, Barbier V, Nowlan B, Jacobsen RN, Forristal CE, Patton JT, Magnani JL, Lévesque JP. Vascular niche E-selectin regulates hematopoietic stem cell dormancy, self renewal and chemoresistance. Nat Med 2012; 18:1651-7. [DOI: 10.1038/nm.2969] [Citation(s) in RCA: 314] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2012] [Accepted: 09/12/2012] [Indexed: 01/16/2023]
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