Different kinetic patterns of BCR-ABL transcript levels in imatinib-treated chronic myeloid leukemia patients after achieving complete cytogenetic response.
Int J Lab Hematol
; 30(4): 317-23, 2008 Aug.
Article
em En
| MEDLINE
| ID: mdl-18665830
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.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Piperazinas
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Pirimidinas
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RNA Mensageiro
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Leucemia Mielogênica Crônica BCR-ABL Positiva
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Proteínas de Fusão bcr-abl
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Inibidores de Proteínas Quinases
Tipo de estudo:
Diagnostic_studies
/
Prognostic_studies
Limite:
Adolescent
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Adult
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Aged
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Ano de publicação:
2008
Tipo de documento:
Article