Analysis of factors associated with successful allogeneic peripheral blood stem cell collection in healthy donors

Background: The collection of a sufficient number of stem cells is important for success of allogeneic hematopoietic stem cell transplantation (HSCT). This study aimed to investigate the factors associated with successful allogeneic peripheral stem cell (PBSC) collection in healthy donors. Methods: We retrospectively reviewed clinical data of allogeneic PBSC collection in 175 donors from 2007 to 2017 at the National Cancer Center, Korea. This study analyzed factors associated with the CD34+ cell yield such as the characteristics of donors, including age, laboratory results before apheresis, and data of procedures on the first day. The CD34+ cell dose of >= 4.0 x 10(6)/kg have recently been the accepted minimum recommended dose in allogeneic HSCT settings, and this was the target dose in our study. Results: The factors associated with the CD34+ cell yield were age (p = 0.007), baseline platelet (PLT) (p = 0.014), and pre-collection hematopoietic progenitor cells (HPCs) (p= 0.001) by multivariate analysis. This study represented that age, baseline platelet count, and pre-collection HPC count are important predictive factors as shown in other previous studies. Conclusion: Our data suggest that young age, high baseline platelet counts and high HPC counts before collection might be useful for identifying successful mobilizers.