title: The detection of flow cytometric G-CSF receptor expression and it's effect on therapy in acute myeloid leukemia.
abstract: The aim of this study was to evaluate G-CSF receptor (G-CSFr) expression on myeloid blasts, its prognostic significance and role in growth factor use and the safety and efficacy of G-CSF in the treatment of AML. Expression of G-CSFr, CD11a, CD11b, CD11c, CD13, CD33 and CD34 were analyzed with flow cytometry in 101 patients with AML aged 15-60 years. Results were reported as a percentage of positive cells. G-CSFr expression rate was found to be higher in M2 and M3 but lower in M5, M6 phenotypes, and in secondary leukemia. Patients were randomized for G-CSF use. Of 101 cases 51 received G-CSF. The overall remission rate was 68.7%. G-CSF use did not seem to have any effect on the remission rates. The median time to reach neutrophil counts > or = 1000/microliter in cases receiving G-CSF was 23 days, and 28 days in the control group (p < 0.01). G-CSF significantly reduced the number of febrile days (p < 0.01). Early and late relapses of 8 and 16 were observed during follow-up which was not effected by G-CSF use. In patients who were G-CSFr(+), G-CSF use did not alter overall survival rate. Univariate and multivariate analysis have revealed that not sex, G-CSF use or G-CSFr but age, FAB subtype and performance status at diagnosis were the important factors on both overall and disease free survival. We have demonstrated no beneficial effect of G-CSFr analysis on in vivo G-CSF use.
authors.affiliation: Faculty of Medicine, Department of Hematology-Oncology, Ankara University, Ankara, Turkey. skutlay@hotmail.com
authors.forename: Sim
authors.initials: S
authors.lastname: Kutlay
authors.forename: Meral
authors.initials: M
authors.lastname: Beksac
authors.forename: Klara
authors.initials: K
authors.lastname: Dalva
authors.forename: Osman
authors.initials: O
authors.lastname: Ilhan
authors.forename: Haluk
authors.initials: H
authors.lastname: Koc
authors.forename: Hamdi
authors.initials: H
authors.lastname: Akan
authors.forename: Muhit
authors.initials: M
authors.lastname: Ozcan
mesh_terms: D000208:Acute Disease; D000328:Adult; D000368:Aged; D001752:Blast Crisis / Q000473:pathology; D018572:Disease-Free Survival; D005260:Female; D005434:Flow Cytometry / Q000379:methods; D016179:Granulocyte Colony-Stimulating Factor / Q000494:pharmacology / Q000627:therapeutic use*; D006801:Humans; D016130:Immunophenotyping; D007951:Leukemia, Myeloid / Q000175:diagnosis* / Q000188:drug therapy* / Q000401:mortality; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D016188:Receptors, Granulocyte Colony-Stimulating Factor / Q000032:analysis*; D015996:Survival Rate; D016896:Treatment Outcome
chemical_list: D016188:Receptors, Granulocyte Colony-Stimulating Factor; D016179:Granulocyte Colony-Stimulating Factor