Abstract
It is now widely accepted that the detection of minimal residual disease (MRD) has prognostic value in acute leukemia. However clinical MRD studies need standardized techniques. Therefore, several European laboratories have aligned their goals and performed comparative studies to achieve optimization and standardization of MRD techniques. This was achieved via the BIOMED-1 Concerted Action “Investigation of minimal residual disease in acute leukemia: International standardization and clinical evaluation.” This report describes the development of PCR primers and protocols for the detection of MRD in acute lymphoblastic leukemia (ALL) using clone-specific junctional regions of immunoglobulin and T cell receptor gene rearrangements and TAL1 deletions as PCR targets. A total of 54 primers was developed (1) to amplify rearrangements of the TCRD, TCRG, and IGK (Kde) genes as well as TAL1 deletions; (2) to sequence the junctional regions and breakpoint fusion regions; and (3) to perform MRD detection in bone marrow or peripheral blood samples during follow-up of ALL patients. Protocols were established to identify PCR targets at diagnosis by performing 25 PCR reactions per patient using appropriate positive and negative controls. Standardized protocols were developed for MRD monitoring via single amplification of the PCR target followed by dot blot hybridization with the corresponding patient-specific junctional region probe. In addition, alternative approaches were designed for cases where the target sensitivity of at least 10−4 was not obtained. The standardization described here of MRD-PCR techniques is essential for the process of translating MRD research into clinical practice.
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Pongers-Willemse, M., Seriu, T., Stolz, F. et al. Primers and protocols for standardized detection of minimal residual disease in acute lymphoblastic leukemia using immunoglobulin and T cell receptor gene rearrangements and TAL1 deletions as PCR targets Report of the BIOMED-1 CONCERTED ACTION: Investigation of minimal residual disease in acute leukemia. Leukemia 13, 110–118 (1999). https://doi.org/10.1038/sj.leu.2401245
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DOI: https://doi.org/10.1038/sj.leu.2401245
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