title: Second donation of granulocyte-colony-stimulating factor-mobilized peripheral blood progenitor cells: risk factors associated with a low yield of CD34+ cells.
abstract: BACKGROUND
  There are still limited data on the efficacy and safety of repeated donations of granulocyte-colony-stimulating factor (G-CSF)-mobilized peripheral blood progenitor cells (PBPCs) for allogeneic transplantation.
  
  
  METHODS
  Sixty-seven healthy donors undergoing two consecutive mobilizations of PBPCs within a median interval of 5 months (range, 0.1-47 months) were investigated. For both first mobilization (FM) and second mobilization (SM), G-CSF (lenograstim) at 7.5 microg per kg per day was administered.
  
  
  RESULTS
  The nonhematologic side effects were comparable between both mobilizations. A significantly lower yield of CD34+ cells x 10(6) per kg of donor weight was obtained on Day 5 of SM in female (n = 31; FM, 5.0; SM, 3.23; p = 0.008) but not in male (n = 36; FM, 5.96; SM, 5.36; p = 0.24) donors. Multivariate analysis identified a lower CD34+ blood concentration on Day 5 of FM (p < 0.001) as well as female sex (p = 0.015) as independent risk factors for a lower yield of progenitor cells, whereas donor age and body mass index, interval between donations, and schedule of G-CSF application showed no significant impact.
  
  
  CONCLUSIONS
  The identified risk factors allow the estimation of the efficacy of a SM in an individual donor before G-CSF administration, thus avoiding distress to both the donor and the recipient.
authors.affiliation: Medical Department I and the Institute of Transfusion Medicine, University Hospital Carl Gustav Carus Dresden, Dresden, Germany. Uwe.Platzbecker@uniklinikum-dresden.de
authors.forename: Uwe
authors.initials: U
authors.lastname: Platzbecker
authors.forename: Martin
authors.initials: M
authors.lastname: Bornhäuser
authors.forename: Kristin
authors.initials: K
authors.lastname: Zimmer
authors.forename: Linda
authors.initials: L
authors.lastname: Lerche
authors.forename: Claudia
authors.initials: C
authors.lastname: Rutt
authors.forename: Gerhard
authors.initials: G
authors.lastname: Ehninger
authors.forename: Kristina
authors.initials: K
authors.lastname: Hölig
mesh_terms: D000328:Adult; D000368:Aged; D018952:Antigens, CD34 / Q000032:analysis*; D001772:Blood Cell Count; D001782:Blood Donors; D005260:Female; D016179:Granulocyte Colony-Stimulating Factor / Q000494:pharmacology*; D019650:Hematopoietic Stem Cell Mobilization / Q000009:adverse effects; D006412:Hematopoietic Stem Cells / Q000166:cytology*; D006801:Humans; D000078224:Lenograstim; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D011994:Recombinant Proteins / Q000494:pharmacology*; D012307:Risk Factors
chemical_list: D018952:Antigens, CD34; D011994:Recombinant Proteins; D016179:Granulocyte Colony-Stimulating Factor; D000078224:Lenograstim