Abstract
Interphase-FISH (fluorescence in situ hybridization) studies have been devoted to the determination of clonality of aberrant karyotypes in human leukemia. Various levels of its extent have been examined, including the meaning of a single aberrant karyotype as representing a microclone, the use of FISH to confirm clonality in bi- or multiclonal leukemia, the estimation of the residual (aberrant) clone after contrasexual bone marrow transplantation, and the redetectability in interphase of the abl/bcr rearrangement. The quantitative findings of all these lines of interphase FISH analyses were based on the comparison with data from a large-scale "control" study on normal cells using the same DNA probes which have been chosen for the determination of clonality, i.e. centromeric DNA probes for chromosomes #1, #3, from #6 to #12, from #15 to #18, #20, X and Y, and a specific probe for the abl/bcr rearrangement. In addition, the validity of interphase-FISH analysis on classical bone marrow smears was examined. As a common outcome it was concluded that interphase-FISH technique is a valuable tool for defining clonality of karyotypic changes and, as a consequence, yields additional prognostic information in many human leukemias. It is r...Continue Reading
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