title: Factors affecting autologous peripheral blood hematopoietic stem cell collections by large-volume leukapheresis: a single center experience.
abstract: OBJECTIVE
  To evaluate factors affecting peripheral blood hematopoietic stem cell yield in patients undergoing large-volume leukapheresis for autologous peripheral blood stem cell collection.
  
  
  METHODS
  Data from 304 consecutive autologous peripheral blood stem cell donors mobilized with hematopoietic growth factor (usually G-CSF), associated or not with chemotherapy, at Hospital Israelita Albert Einstein between February 1999 and June 2010 were retrospectively analyzed. The objective was to obtain at least 2 × 106 CD34+ cells/kg of body weight. Pre-mobilization factors analyzed included patient's age, gender and diagnosis. Post mobilization parameters evaluated were pre-apheresis peripheral white blood cell count, immature circulating cell count, mononuclear cell count, peripheral blood CD34+ cell count, platelet count, and hemoglobin level. The effect of pre and post-mobilization factors on hematopoietic stem cell collection yield was investigated using logistic regression analysis (univariate and multivariate approaches).
  
  
  RESULTS
  Pre-mobilization factors correlating to poor CD34 + cell yield in univariate analysis were acute myeloid leukemia (p = 0.017) and other hematological diseases (p = 0.023). Significant post-mobilization factors included peripheral blood immature circulating cells (p = 0.001), granulocytes (p = 0.002), hemoglobin level (p = 0.016), and CD34+ cell concentration (p < 0.001) in the first harvesting day. However, according to multivariate analysis, peripheral blood CD34+ cell content (p < 0.001) was the only independent factor that significantly correlated to poor hematopoietic stem cell yield.
  
  
  CONCLUSIONS
  In this study, peripheral blood CD34+ cell concentration was the only factor significantly correlated to yield in patients submitted to for autologous collection.
authors.affiliation: Hospital Israelita Albert Einstein - HIAE, São Paulo, SP, BR.
authors.forename: Araci Massami
authors.initials: AM
authors.lastname: Sakashita
authors.affiliation: Hospital Israelita Albert Einstein - HIAE, São Paulo, SP, BR.
authors.forename: Andrea Tiemi
authors.initials: AT
authors.lastname: Kondo
authors.affiliation: Blood Bank, Hospital Israelita Albert Einstein - HIAE, São Paulo, SP, BR.
authors.forename: Andreza Alice Feitosa
authors.initials: AA
authors.lastname: Ribeiro
authors.affiliation: Hospital Israelita Albert Einstein - HIAE, São Paulo, SP, BR.
authors.forename: Andrea Neri Folchini
authors.initials: AN
authors.lastname: Cipolletta
authors.affiliation: Hospital Israelita Albert Einstein - HIAE, São Paulo, SP, BR.
authors.forename: Monica Vilela
authors.initials: MV
authors.lastname: Colesanti
authors.affiliation: Hospital Israelita Albert Einstein - HIAE, São Paulo, BR.
authors.forename: Nelson
authors.initials: N
authors.lastname: Hamerschlak
authors.affiliation: Blood Bank, Hospital Israelita Albert Einstein - HIAE, São Paulo, SP, BR.
authors.forename: Jose Mauro
authors.initials: JM
authors.lastname: Kutner