Send to

Choose Destination
See comment in PubMed Commons below
Exp Hematol. 2001 Dec;29(12):1456-64.

SDF-1-induced actin polymerization and migration in human hematopoietic progenitor cells.

Author information

Division of Medical Oncology, Netherlands Cancer Institute, Amsterdam, The Netherlands.



The capacity of hematopoietic progenitor cells (HPCs; CD34(+) cells) to respond to chemotactic stimulation is essential for their homing efficiency, e.g., during stem cell transplantation. Previous studies established that stromal cell-derived factor-1 (SDF-1) and its receptor CXCR-4 play an important role in the homing of HPCs. The aim of the present study was to analyze SDF-1-induced actin polymerization and migration of HL-60 cells and primary human CD34(+) cells.


SDF-1-induced migration of CD34(+) cells from cord blood (CB) and peripheral blood (PB) across fibronectin-coated filters was measured in a Transwell assay. Actin polymerization was detected using fluorescent phalloidin and analyzed by confocal microscopy and FACS analysis.


SDF-1 induced a rapid and transient increase in actin polymerization and in polarization of the actin cytoskeleton in primary CD34(+) cells and HL-60 cells. SDF-1 was found to induce significantly more actin polymerization in CB CD34(+) cells that show fast migration in vitro compared to slow migrating PB CD34(+) cells. Moreover, CB CD34(+) cells that had migrated toward SDF-1 showed an elevated and prolonged rise in F-actin upon second exposure to SDF-1 compared to nonmigrated cells, although both cell types expressed equal levels of the SDF-1 receptor CXCR-4.


The relatively high migratory capacity of CB-derived human HPCs is not related to cellular polarization or high expression of the SDF-1 receptor but is largely determined by their capacity to efficiently polymerize F-actin in response to SDF-1.

[Indexed for MEDLINE]
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Support Center