Mobilization of Ph chromosome-negative peripheral blood stem cells in chronic myeloid leukaemia patients with imatinib mesylate-induced complete cytogenetic remission.

Abstract:

:Imatinib mesylate (IM, STI 571, Glivec) can induce a high rate of complete cytogenetic response (CCR) in chronic myeloid leukaemia (CML) patients, although to date the majority of patients continue to have detectable disease by sensitive reverse transcription polymerase chain reaction (RT-PCR). It is therefore possible that these patients may ultimately relapse and require treatment such as autologous peripheral blood stem cell transplant (APBSCT). We attempted mobilization of haemopoietic progenitor cells from 58 patients in CCR using recombinant human granulocyte colony-stimulating factor [rHu-G-CSF; 10 micro g/kg/d subcutaneously (s.c.) for at least 4 d] alone, while continuing IM treatment. The median d 5 (peak) CD34+ count was 11.5/ microl (range 0-108/ microl), and 43/58 (74%) patients underwent a median of two (range 1-3) apheresis procedures. A median dose of 2.1 x 10(6)/kg CD34+ cells (range 0.1-6.5 x 10(6)/kg) was collected. Some 84% of 31 collections analysed were negative for the Philadelphia (Ph) chromosome or breakpoint cluster region and Abelson murine leukaemia viral oncogene homologue (BCR-ABL) translocation by cytogenetics or fluorescent in situ hybridization respectively. No toxicity was reported with the regimen. Overall, the target CD34+ dose (2 x 10(6)/kg CD34+) was attained in 23/58 (40%) patients who entered the study. In summary, we have demonstrated that successful mobilization of Ph- CD34+ cells from IM-treated patients in CCR is possible using rHu-G-CSF alone.

journal_name

Br J Haematol

authors

Drummond MW,Marin D,Clark RE,Byrne JL,Holyoake TL,Lennard A,United Kingdom Chronic Myeloid Leukaemia (UK CML) Working Party.

doi

10.1046/j.1365-2141.2003.04599.x

subject

Has Abstract

pub_date

2003-11-01 00:00:00

pages

479-83

issue

3

eissn

0007-1048

issn

1365-2141

pii

4599

journal_volume

123

pub_type

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