Different kinetic patterns of BCR-ABL transcript levels in imatinib-treated chronic myeloid leukemia patients after achieving complete cytogenetic response.

Abstract:

:Bone marrow BCR-ABL transcript levels were monitored serially by real-time quantitative PCR in 46 imatinib-treated chronic myeloid leukemia patients after achieving complete cytogenetic response (CCyR) for a median of 42 months (range: 9-53). Of 41 patients in continuous CCyR, 32 and nine could achieve a >/=3-log (MMoR group) or 2- to 3-log reduction (non-MMoR group), respectively. The MMoR group had a significantly lower recurrence rate of Ph+ metaphase than the non-MMoR group (6/32 vs. 7/9, P = 0.002), which was not significantly different between patients first achieving CCyR within or after 12 months of imatinib treatment (7/27 vs. 6/14, P = 0.086). Five patients suffered cytogenetic or hematological relapse. For all 46 patients, a >2-log reduction but not time when CCyR was first achieved was related to a lower relapse rate (1/42 vs. 4/4, P < 0.001). We concluded that the depth of BCR-ABL reduction after CCyR is more critical than when CCyR is first achieved. The kinetic pattern of BCR-ABL transcript is a good predictor of disease stability.

journal_name

Int J Lab Hematol

authors

Qin YZ,Liu YR,Zhu HH,Li JL,Ruan GR,Zhang Y,Jiang Q,Jiang H,Li LD,Chang Y,Huang XJ,Chen SS

doi

10.1111/j.1751-553X.2007.00962.x

subject

Has Abstract

pub_date

2008-08-01 00:00:00

pages

317-23

issue

4

eissn

1751-5521

issn

1751-553X

pii

CLH962

journal_volume

30

pub_type

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