Analysis of factors associated with low peripheral blood progenitor cell collection in normal donors


  • ABBREVIATIONS: CBC = complete blood count; PBPC = peripheral blood progenitor cell.

  • Supported in part by grant FIS-99/0891 from Social Security Sanitary Investigation Fund, Spanish Ministry of Health.

Address reprint requests to: Javier de la Rubia, MD, Servicio de Hematología, Hospital Universitario La Fe, Avda. Campanar, 21, 46009 Valencia, Spain; e-mail:


BACKGROUND: Predictive factors of the response to rHuG–CSF in normal donors have not been extensively studied.

STUDY DESIGN AND METHODS: We analyzed factors influencing CD34+ cell yield in the 1st day of collection in 261 healthy donors from the Spanish National Donor Registry. The median age was 38 years (range, 2-72). The median dose of rHuG–CSF was 10 μg per kg per day (range, 5-20) over 4 days. In 103 donors (40%), <4 × 106 per kg CD34+ cells were collected. The variables that were analyzed included age, sex, weight, basal complete blood cell count, dose, type of rHuGCSF and schedule of administration, and maximum WBC count before apheresis.

RESULTS: By univariate analysis, the maximum WBC count (<50 vs. ≥50 × 109/L, p = 0.004), advanced age (p = 0.008), and number of daily rHuG–CSF doses (one vs. two; p = 0.01) correlated with the number of CD34+ cells collected. By multivariate analysis, donors age (<38 vs. ≥38 years; p = 0.014) and a single daily dose of rHuG–CSF (p = 0.005) were the two variables that significantly predicted a low CD34+ cell yield.

CONCLUSION: Donors' age, with a threshold of 38 years or more, and the rHuG–CSF schedule are the factors that significantly affected CD34+ cell mobilization and collection in healthy donors.