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Original Article

Molecular Monitoring of Minimal Residual Disease in Acute Myeloblastic Leukemia with t(8;21) by RT-PCR

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Pages 115-120 | Received 02 Dec 1997, Published online: 01 Jul 2009
 

Abstract

The t(8;21) is one of the most common translocations in acute myeloid leukaemia (AML) occurring in approximately 20% of adult and 40% of paediatric AML-M2. This translocation fuses the AML1 gene on chromosome 21q to the MTG8 (ETO) gene on chromosome 8q to produce the fusion gene AML1-MTG8. Transcripts for the AML1-MTG8 fusion gene have been detected in the majority of patients in remission by qualitative RT-PCR methods. Thus for such patients these methods are unsuitable for monitoring minimal residual disease (MRD). Furthermore, the diverse form of transcripts for this fusion gene was found in patients at different phases of their disease, which rules out the usefulness of the expression of any particular set of transcripts as a marker for monitoring MRD in those patients. On the other hand a quantitative RT-PCR method we developed, was able to assess the effectiveness of treatment and predict relapse up to four months before the onset of haematological relapse. This method should distinguish patients in stable remission from those at high risk of relapse and therefore identify patients who would require additional or new treatment such as BMT.

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