Rapid mobilization of hematopoietic progenitors by AMD3100 and catecholamines is mediated by CXCR4-dependent SDF-1 release from bone marrow stromal cells

Leukemia. 2011 Aug;25(8):1286-1296. doi: 10.1038/leu.2011.62. Epub 2011 Apr 15.

Abstract

Steady-state egress of hematopoietic progenitor cells can be rapidly amplified by mobilizing agents such as AMD3100, the mechanism, however, is poorly understood. We report that AMD3100 increased the homeostatic release of the chemokine stromal cell derived factor-1 (SDF-1) to the circulation in mice and non-human primates. Neutralizing antibodies against CXCR4 or SDF-1 inhibited both steady state and AMD3100-induced SDF-1 release and reduced egress of murine progenitor cells over mature leukocytes. Intra-bone injection of biotinylated SDF-1 also enhanced release of this chemokine and murine progenitor cell mobilization. AMD3100 directly induced SDF-1 release from CXCR4(+) human bone marrow osteoblasts and endothelial cells and activated uPA in a CXCR4/JNK-dependent manner. Additionally, ROS inhibition reduced AMD3100-induced SDF-1 release, activation of circulating uPA and mobilization of progenitor cells. Norepinephrine treatment, mimicking acute stress, rapidly increased SDF-1 release and progenitor cell mobilization, whereas β2-adrenergic antagonist inhibited both steady state and AMD3100-induced SDF-1 release and progenitor cell mobilization in mice. In conclusion, this study reveals that SDF-1 release from bone marrow stromal cells to the circulation emerges as a pivotal mechanism essential for steady-state egress and rapid mobilization of hematopoietic progenitor cells, but not mature leukocytes.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Benzylamines
  • Bone Marrow Cells / metabolism*
  • Cells, Cultured
  • Chemokine CXCL12 / physiology*
  • Cyclams
  • Hematopoietic Stem Cell Mobilization / methods*
  • Hematopoietic Stem Cells / drug effects*
  • Heterocyclic Compounds / pharmacology*
  • Humans
  • Mice
  • Mice, Inbred BALB C
  • Mice, Inbred C57BL
  • Norepinephrine / pharmacology*
  • Receptors, CXCR4 / physiology*
  • Stromal Cells / metabolism

Substances

  • Benzylamines
  • Chemokine CXCL12
  • Cyclams
  • Heterocyclic Compounds
  • Receptors, CXCR4
  • plerixafor
  • Norepinephrine