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Related Collections Neoplasia Transplantation Clinical Trials and Observations Social Bookmarking                   What's this?  Previous Article  |  Table of Contents  |  Next Article  Blood, 15 March 2001, Vol. 97, No. 6, pp. 1560-1565 CLINICAL OBSERVATIONS, INTERVENTIONS, AND THERAPEUTIC TRIALS Early detection of BCR-ABL transcripts by quantitative reverse transcriptase-polymerase chain reaction predicts outcome after allogeneic stem cell transplantation for chronic myeloid leukemia Eduardo Olavarria, Edward Kanfer, Richard Szydlo, Jaspal Kaeda, Katayoun Rezvani, Kate Cwynarski, Christopher Pocock, Francesco Dazzi, Charles Craddock, Jane F. Apperley, Nicholas C. P. Cross, and John M. Goldman From the Department of Haematology, Hammersmith Hospital, Imperial College School of Medicine, London, England. The reverse transcriptase-polymerase chain reaction (RT-PCR) has become widely used for monitoring minimal residual disease after allogeneic stem cell transplantation (SCT) for chronic myeloid leukemia (CML). However, most of these studies were performed using qualitative RT-PCR, and the interpretation of the results obtained has been conflicting. The correlation of a quantitative RT-PCR test performed early after SCT (at 3 to 5 months) and long-term outcome of CML patients surviving for more than 6 months was studied. Between January 1991 and June 1999, data from 138 CML patients who received allografts were evaluated. Early RT-PCR results were classified as (1) negative if there were no BCR-ABL transcripts detected (n = 61), (2) positive at low level if the total number of BCR-ABL transcripts was less than 100 per µg RNA and/or the BCR-ABL/ABL ratio was less than 0.02% (n = 14), or (3) positive at high level if transcript levels exceeded the thresholds defined above (n = 63). Three years after SCT the cumulative incidence of relapse was 16.7%, 42.9%, and 86.4%, respectively (P = .0001). The relationship between BCR-ABL transcript level and probability of relapse was apparent whether patients had received sibling or unrelated donor SCT and also whether or not the transplantation was T cell depleted. The results suggest that quantitative RT-PCR performed early after SCT is useful for predicting outcome and may help to define the need for further treatment. © 2001 by The American Society of Hematology.   CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    What's this? This article has been cited by other articles: T. Lundan, V. Juvonen, M. C. Mueller, S. Mustjoki, T. Lakkala, V. Kairisto, A. Hochhaus, S. Knuutila, and K. 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