title: Lenograstim-mobilized peripheral blood progenitor cells in volunteer donors: an open label randomized split dose escalating study.
abstract: Mobilization of peripheral blood cell progenitor cells was investigated in 36 healthy sibling donors using three different split doses of glycosylated rhG-CSF (lenograstim). The donors were randomized into three groups: group 1 was given lenograstim at 8, group 2 at 11 and group 3 at 15 micrograms/kg/day in two split doses, subcutaneously for 4 and 5 days, respectively. Leukapheresis was performed on day 4 or 5 depending on the WBC and CD34+ cell count. We were able to demonstrate that there was a significant correlation between circulating CD34+ cells on the day of harvest and CD34+ cells in the apheresis products in all three groups. The number of CD34+ cells pre-apheresis was inversely correlated with age in group 1 and group 2. However, in group 3, the number of CD34+ cells pre-apheresis did not correlate with age. There was also a difference between the number of progenitor cells mobilized in the three dose groups regarding the time of harvest. Apheresis was performed in groups 1 and 2 on day 5 of mobilization in order to obtain a sufficient number of stem cells for allogeneic transplantation. In contrast, with the split dose of 15 micrograms/kg/day, harvest could be routinely performed on day 4 of stimulation. We conclude that lenograstim given twice a day at doses of 8, 11 and 15 micrograms/kg/day provided different CD34+ cell yields in normal donors, in particular, with regard to the time of harvest. The number of CD34+ cells pre-apheresis was not correlated with age in the group of donors mobilized with a split dose of 15 micrograms/kg/day, indicating that this dosage might also be suitable for older donors.
authors.affiliation: Clinic of Bone Marrow Transplantation and Haematology/Oncology, Idar-Oberstein, Germany.
authors.forename: N
authors.initials: N
authors.lastname: Basara
authors.forename: B
authors.initials: B
authors.lastname: Schmetzer
authors.forename: I W
authors.initials: IW
authors.lastname: Blau
authors.forename: M
authors.initials: M
authors.lastname: Bischoff
authors.forename: S
authors.initials: S
authors.lastname: Günzelmann
authors.forename: D
authors.initials: D
authors.lastname: Kirsten
authors.forename: A A
authors.initials: AA
authors.lastname: Fauser
mesh_terms: D000276:Adjuvants, Immunologic / Q000008:administration & dosage*; D000293:Adolescent; D000328:Adult; D018952:Antigens, CD34; D001782:Blood Donors; D005260:Female; D016179:Granulocyte Colony-Stimulating Factor / Q000008:administration & dosage*; D019650:Hematopoietic Stem Cell Mobilization; D018380:Hematopoietic Stem Cell Transplantation; D006801:Humans; D000078224:Lenograstim; D008297:Male; D011994:Recombinant Proteins / Q000008:administration & dosage; D014184:Transplantation, Homologous
chemical_list: D000276:Adjuvants, Immunologic; D018952:Antigens, CD34; D011994:Recombinant Proteins; D016179:Granulocyte Colony-Stimulating Factor; D000078224:Lenograstim