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  • Title: Breakpoint heterogeneity in t(10;11) translocation in AML-M4/M5 resulting in fusion of AF10 and MLL is resolved by fluorescent in situ hybridization analysis.
    Author: Beverloo HB, Le Coniat M, Wijsman J, Lillington DM, Bernard O, de Klein A, van Wering E, Welborn J, Young BD, Hagemeijer A.
    Journal: Cancer Res; 1995 Oct 01; 55(19):4220-4. PubMed ID: 7671224.
    Abstract:
    Ten AML-M4/M5 patients' samples containing a t(10;11) translocation, but with different cytogenetic breakpoints on chromosome 11q (11q13-23), were studied by G- and R-banding and fluorescent in situ hybridization. Southern blotting analysis, studied in five patients, revealed a rearranged MLL gene. Reverse transcription-PCR analysis carried out in six patients showed a 5' MLL-3' AF-10 fusion transcript. Fluorescent in situ hybridization studies suggested that in 8 of 10 patients, the rearrangement/fusion transcript resulted from an inversion of a part of 11q (q13q23) translocated to 10p12. In the other two patients, it is assumed that an inversion/translocation has occurred of a part of 10p to the der(11). The results suggest that the orientation of the AF-10 gene on 10p is 5' telomeric and 3' centromeric. This is the first example of opposite-oriented genes being involved in translocation to yield fusion transcripts.
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