title: Analysis of the effect of prior therapy on progenitor cell yield: use of a chemotherapy scoring system.
abstract: A quantitative analysis of peripheral blood stem cell (PBSC) yield, measuring absolute numbers of CD34+ cells x 10(6)/kg and CFU-C x 10(4)/kg was performed in 74 consecutive patients. The interval or 'gap' from the end of previous chemotherapy to the date of priming was recorded in weeks. Geometric mean CD34 and CFU-C values were significantly higher in patients with a score of < or = 60 compared to those with score > 60 (P = 0.003 and 0.02, respectively) and a significant difference in CD34 values was also found when scores of < or = 38 were compared with scores > 38 (P = 0.003), with the difference in CFU-C values approaching significance (P = 0.08). Patients exposed to toxicity factor 4 drugs had significant lowering of both CD34 and CFU-C values (P < 0.001 and P = 0.038) and this emerged as the only independent factor when analysed using linear regression. No significant difference in the geometric mean CD34 or CFU-C values of patients was found in any of the gap categories analysed. Prior exposure to toxicity factor 4 drugs had a significant adverse effect on stem cell yield and should be avoided or minimized prior to stem cell harvesting.
authors.affiliation: Haematology Department, Belfast City Hospital, Northern Ireland.
authors.forename: M
authors.initials: M
authors.lastname: Drake
authors.forename: L
authors.initials: L
authors.lastname: Ranaghan
authors.forename: T C
authors.initials: TC
authors.lastname: Morris
authors.forename: L
authors.initials: L
authors.lastname: Nolan
authors.forename: Z R
authors.initials: ZR
authors.lastname: Desai
authors.forename: A E
authors.initials: AE
authors.lastname: Irvine
authors.forename: A
authors.initials: A
authors.lastname: Jordan
authors.forename: K
authors.initials: K
authors.lastname: Magill
authors.forename: S
authors.initials: S
authors.lastname: Price
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000009:adverse effects*; D003114:Colony-Forming Units Assay; D005260:Female; D016179:Granulocyte Colony-Stimulating Factor / Q000627:therapeutic use*; D019650:Hematopoietic Stem Cell Mobilization / Q000379:methods*; D006412:Hematopoietic Stem Cells / Q000187:drug effects*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies
chemical_list: D016179:Granulocyte Colony-Stimulating Factor