Hematopoietic progenitor cell counts performed by the Sysmex SE-9000 analyzer can guide timing of peripheral blood stem cell harvest.

ABSTRACT

BACKGROUND: We studied whether the hematopoietic progenitor cell (HPC) count in peripheral blood as evaluated by an automated counter, the Sysmex SE-9000, correlated with CD34 positive (+) cell count and therefore could guide the timing of peripheral blood stem cell (PBSC) harvest. MATERIALS AND METHODS: HPC count and flow cytometric CD34+ cell count were measured in 90 peripheral blood samples and 30PBSC samples. The correlation between HPC count and apheretic CD34+ cell yield was examined in 19 patients. RESULTS: HPC count showed good correlations with CD34+ cell count in peripheral blood (r = 0.699) and PBSC (r = 0.892). The correlation between peripheral blood HPC count and apheretic CD34+ cell yield also was good (r = 0.789). CONCLUSION: Automated HPC counting can be used as a screening test to guide the timing of PBSC harvest.