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(Journal of Leukocyte Biology. 2001;70:455-460.)
© 2001 by Society for Leukocyte Biology

CCR1 chemokine receptor expression isolates erythroid from granulocyte-macrophage progenitors

Erika A. de Wynter*, Clare M. Heyworth*, Naofumi Mukaida{dagger}, Ewa Jaworska*, Almeriane Weffort-Santos*, Kouji Matushima{ddagger} and Nydia G. Testa*

* Paterson Institute for Cancer Research, Manchester, United Kingdom; and
{dagger} Kanazawa University, Ishikawa, and
{ddagger} Molecular Preventive Medicine, University of Tokyo, Japan

Correspondence: E. A. de Wynter, Molecular Medicine Unit, Clinical Sciences Building, St James’s University Hospital, Leeds LS9 7TF, United Kingdom. E-mail: medeadw{at}leeds.ac.uk

Simple methods that separate progenitor cells of different hemopoietic lineages would facilitate studies on lineage commitment and differentiation. We used an antibody specific for the chemokine receptor CCR1 to examine mononuclear cells isolated from cord blood samples. When CD34+ cells were separated into CD34+CCR1+ and CD34+CCR1- cells and plated in colony-forming assays, the granulocyte/macrophage progenitors were found almost exclusively in the CD34+CCR1+ cells. In contrast, the CD34+CCR1- cells contained the majority of the erythroid progenitors. There was a highly significant difference (P<0.002) in the total percentage distribution of both granulocyte-macrophage colony-forming cells and erythroid burst-forming units between the two populations. This is the first report of separation of erythroid progenitors from granulocyte/macrophage progenitors using a chemokine receptor antibody in cord blood samples. These results suggest that at the clonogenic progenitor cell stage the expression of CCR1 might be lineage-specific. This method should prove useful for studies on erythroid progenitor and granulocyte/macrophage differentiation.

Key Words: myeloid progenitors • CCR1 antibody • CD34+ cells • MIP-1{alpha}




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