Abstract
Three adult patients with de novo acute myeloid leukemia of distinct subtypes harboring t(11;12)(p15;q13) have been investigated to characterize the genes involved in that translocation. Through molecular cytogenetics, a chromosome break was detected at the 3′ part of nucleoporin 98 (NUP98) gene at 11p15. Using rapid amplification of cDNA end, we identified the partner gene at 12q13, HOXC11. Molecular analysis showed that exon 12 of NUP98 was fused in-frame to exon 2 of HOXC11 in all three cases with t(11;12)(p15;q13). Therefore, this type of fusion may represent the major form of the NUP98-HOXC11 chimera so far reported. Moreover, two out of three cases had a confirmed deletion of the 3′ part of NUP98 gene and more telomeric region of 11p harboring a group of tumor-suppressor genes. Interestingly, the NUP98-HOXC11 protein when assayed in a GAL4 reporter system, showed an aberrant trans-regulatory activity as compared to the wild-type HOXC11 in both COS-7 and HL-60 cells. Therefore, NUP98-HOXC11 may contribute to the leukemogenesis by interfering with the cellular mechanism of transcriptional regulation.
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Acknowledgements
This work was supported in part by the National Key Program for Basic Research (973), National High Tech Program (863), National Natural Science Foundation of China, Shanghai Municipal Commission for Science and Technology, Shanghai Municipal Commission for Education and the Clyde Wu Foundation of SIH. We thank all members of the SIH and SKLMG for their support.
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Gu, BW., Wang, Q., Wang, JM. et al. Major form of NUP98/HOXC11 fusion in adult AML with t(11;12)(p15;q13) translocation exhibits aberrant trans-regulatory activity. Leukemia 17, 1858–1864 (2003). https://doi.org/10.1038/sj.leu.2403036
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DOI: https://doi.org/10.1038/sj.leu.2403036
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