title: Circulating myeloid progenitor cell kinetics during hematologic recovery from chemotherapy and subsequent recombinant human granulocyte-macrophage colony-stimulating factor administration.
abstract: Hematopoietic recovery from chemotherapy may be associated with an increase in circulating myeloid progenitor cell concentration (CFU-GM); these cells may be harvested by apheresis and used for autologous transplantation after high-dose cytoreductive therapy. Not all patients will demonstrate this increase, possibly due to damage to the stem cell compartment from prior chemoradiotherapy. Elevated circulating CFU-GM has also been reported in patients after short-term administration of recombinant human granulocyte-macrophage colony-stimulating factor (rhGM-CSF); whether elevation would persist during longer duration is unknown. We measured circulating CFU-GM (by both limiting dilution in liquid culture and colony formation in semisolid media) in patients with sarcoma who began infusion of rhGM-CSF during recovery from chemotherapy. Patients with elevated circulating CFU-GM did not sustain these levels during subsequent rhGM-CSF infusion. By contrast, patients without rebound elevation of circulating CFU-GM following chemotherapy recovery did increase CFU-GM levels with rhGM-CSF administration. The proportion of marrow CFU-GM in cell cycle during chemotherapy recovery was elevated in both patient groups and remained elevated with rhGM-CSF administration. Both marrow and peripheral blood limiting dilution assays demonstrated linear growth kinetics, indicating a direct effect of the in vitro growth factor (also rhGM-CSF) on progenitor cells without excessive influence or dependence on accessory cells in culture. The use of rhGM-CSF to restore circulating CFU-GM for apheresis during recovery in patients lacking such elevation merits further study.
authors: Department of Hematology, University of Texas, M.D. Anderson Cancer Center, Houston.
authors: G J
authors: GJ
authors: Ventura
authors: C L
authors: CL
authors: Reading
authors: J P
authors: JP
authors: Hester
authors: S
authors: S
authors: Vadhan-Raj
mesh_terms: D000970:Antineoplastic Agents / Q000009:adverse effects*; D001853:Bone Marrow / Q000187:drug effects*; D001854:Bone Marrow Cells; D002453:Cell Cycle / Q000187:drug effects; D002478:Cells, Cultured / Q000166:cytology / Q000187:drug effects; D003114:Colony-Forming Units Assay; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000097:blood / Q000187:drug effects / Q000627:therapeutic use*; D006412:Hematopoietic Stem Cells / Q000166:cytology / Q000187:drug effects*; D006801:Humans; D009503:Neutropenia / Q000097:blood / Q000139:chemically induced / Q000188:drug therapy; D011994:Recombinant Proteins / Q000627:therapeutic use; D012509:Sarcoma / Q000097:blood / Q000150:complications / Q000188:drug therapy
chemical_list: D000970:Antineoplastic Agents; D011994:Recombinant Proteins; D016178:Granulocyte-Macrophage Colony-Stimulating Factor