title: Factors influencing collection of peripheral blood progenitor cells following high-dose cyclophosphamide and granulocyte colony-stimulating factor in patients with multiple myeloma.
abstract: We treated 103 multiple myeloma (MM) patients with 7 g/m2 cyclophosphamide (Cy) followed by 300 micrograms G-CSF/d to harvest peripheral blood progenitor cells (PBPC). PBPC autografts containing > 2.0 x 10(6) CD34+ cells per kg body weight were obtained at the first attempt from 90/100 evaluable patients. The most significant factor predicting impairment of PBPC collection was the duration of previous melphalan treatment (P < 0.0001). In multivariate discriminate analysis, treatment with melphalan during the most recent chemotherapy cycles prior to mobilization (P = 0.0727) and previous radiotherapy (P = 0.0628) had a marginally significant negative influence on the efficacy of PBPC collection. We found no reduced functional capacity of CD34+ cells to restore haemopoiesis after myeloablative treatment related to the duration of melphalan exposure. At the time of best response to conventional treatment, a median paraprotein reduction of 21% was achieved following high-dose cyclophosphamide (HD-Cy). Two heavily pretreated patients died and one patient developed pulmonary toxicity W.H.O. grade IV following HD-Cy. Potential transplant candidates should undergo mobilization and harvesting of PBPC before melphalan-containing treatment. Combinations of haemopoietic growth factors and their dose-modifications should be investigated to improve PBPC collection, to allow a dosage reduction of the mobilization chemotherapy.
authors.affiliation: Department of Internal Medicine V, University of Heidelberg, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Goldschmidt
authors.forename: U
authors.initials: U
authors.lastname: Hegenbart
authors.forename: M
authors.initials: M
authors.lastname: Wallmeier
authors.forename: S
authors.initials: S
authors.lastname: Hohaus
authors.forename: R
authors.initials: R
authors.lastname: Haas
mesh_terms: D000328:Adult; D018941:Antigens, CD19 / Q000032:analysis; D018952:Antigens, CD34 / Q000032:analysis; D018906:Antineoplastic Agents, Alkylating / Q000627:therapeutic use*; D003520:Cyclophosphamide / Q000008:administration & dosage* / Q000009:adverse effects; D005260:Female; D016179:Granulocyte Colony-Stimulating Factor / Q000627:therapeutic use*; D006410:Hematopoiesis / Q000187:drug effects; D019650:Hematopoietic Stem Cell Mobilization / Q000379:methods*; D018380:Hematopoietic Stem Cell Transplantation / Q000379:methods*; D006801:Humans; D008297:Male; D008558:Melphalan / Q000627:therapeutic use; D008875:Middle Aged; D009101:Multiple Myeloma / Q000188:drug therapy*; D009503:Neutropenia / Q000139:chemically induced; D013921:Thrombocytopenia / Q000139:chemically induced; D016896:Treatment Outcome
chemical_list: D018941:Antigens, CD19; D018952:Antigens, CD34; D018906:Antineoplastic Agents, Alkylating; D016179:Granulocyte Colony-Stimulating Factor; D003520:Cyclophosphamide; D008558:Melphalan