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  • Title: [Clinical factors that affect the detection of BCR-ABL transcripts after allogenic bone marrow transplantation for chronic myeloid leukemia].
    Author: Román J, García MJ, Martín C, Sánchez J, Serrano J, Falcón M, Castillejo JA, Navarro JA, Flores R, Torres A.
    Journal: Med Clin (Barc); 1998 Oct 10; 111(11):405-9. PubMed ID: 9834912.
    Abstract:
    BACKGROUND: To evaluate the relationship between clinical parameters and the ability to detect BCR-ABL-positive cells in a series of 27 long survivor patients after allogeneic bone marrow transplantation (BMT) for chronic myelogenous leukemia (CML). PATIENTS AND METHODS: A total of 78 samples obtained between 1 and 160 months after BMT were analyzed for the presence of the BCR-ABL transcript detected by the reverse-transcription polymerase chain reaction (PCR) using nested primers. Median follow up was 83 months. RESULTS: 16 patients were persistently PCR-positive and 7 patients persistently PCR-negative. The original transcript became negative in four patients. Only two of the positive cases developed hematologic relapse during the period of study. High white blood cell counts before BMT (17.88 vs 10.12 x 10(9)/l; p = 0.008) and immunosuppressive therapy for chronic graft-versus-host disease (p < 0.05) were associated with an increased ability to detect residual BCR-ABL positive cells. CONCLUSIONS: Our data show that most patient are persistently BCR-ABL positive after BMT for CML. If these findings represents a dynamic balance between the tumour burden prior BMT and the immunological capability of the graft must be confirmed in further studies.
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