title: [Hematopoietic recovery as a function of the number of autografted CD34+ cells: a retrospective study of 66 patients with malignant hematologic diseases].
abstract: Engraftment in relation to infused CD34+ cell number was retrospectively analysed in 66 patients with hematological diseases: non-Hodgkin's lymphoma (n = 33), multiple myeloma (n = 21), acute myelogenous leukemia (n = 7), Hodgkin's disease (n = 4) and myelodysplastic syndrome (n = 1). Progenitor cells were mobilized with rhG-CSF, alone or in association with chemotherapy. The cells were harvested by leukapheresis until at least 2 x 10(6) CD34+/kg body weight were obtained. A total of 194 leukaphereses were performed (median = 3 per patient, range 1-9). A median of 3.40 x 10(8) nucleated cells/kg (range 0.31-27.59) and a median of 7.15 x 10(6) CD34+ cell/kg (range 1.31-115.70) were transplanted. Regardless of transfusional support or patient diagnosis, engraftment was rapid in patients who had received > or = 5 x 10(6) CD34+ cell/kg. In this case, absolute neutrophil blood count > or = 0.5 x 10(9)/l was obtained on day 12 post graft (range 7-19) and platelet count > or = 20 x 10(9)/l was also reached after the same median time interval (range 8-121). From the present results, a minimal threshold of 5 x 10(6) CD34+ cell/kg appears to be suitable for providing rapid and complete hematopoieitc reconstitution in patients exposed to high doses of chemotherapy with or without total body irradiation. Furthermore, administration of rhG-CSF during post-graft period significantly decreased the neutrophil time recovery (P = 0.002) but not that of platelets (P > 0.05).
authors.affiliation: Laboratoire d'immunohématologie, Cliniques Universitaires Saint-Luc, Université catholique de Louvain, Bruxelles, Belgique. Rachid.boulassel@mblg.ucl.ac.be
authors.forename: M R
authors.initials: MR
authors.lastname: Boulassel
authors.forename: M
authors.initials: M
authors.lastname: De Bruyère
authors.forename: B T
authors.initials: BT
authors.lastname: Nguyen
authors.forename: N
authors.initials: N
authors.lastname: Straetmans
authors.forename: A
authors.initials: A
authors.lastname: Ferrant
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000368:Aged; D018952:Antigens, CD34; D000970:Antineoplastic Agents / Q000627:therapeutic use; D005260:Female; D016179:Granulocyte Colony-Stimulating Factor / Q000627:therapeutic use; D019337:Hematologic Neoplasms / Q000628:therapy*; D006410:Hematopoiesis / Q000502:physiology*; D018380:Hematopoietic Stem Cell Transplantation; D006689:Hodgkin Disease / Q000628:therapy; D006801:Humans; D007937:Leukapheresis; D007951:Leukemia, Myeloid / Q000628:therapy; D007958:Leukocyte Count; D008228:Lymphoma, Non-Hodgkin / Q000628:therapy; D008297:Male; D008875:Middle Aged; D009101:Multiple Myeloma / Q000628:therapy; D009190:Myelodysplastic Syndromes / Q000628:therapy; D009504:Neutrophils / Q000502:physiology; D010976:Platelet Count; D012189:Retrospective Studies; D019172:Transplantation Conditioning; D014182:Transplantation, Autologous; D014916:Whole-Body Irradiation
chemical_list: D018952:Antigens, CD34; D000970:Antineoplastic Agents; D016179:Granulocyte Colony-Stimulating Factor