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Cell Cycle. 2007 Apr 15;6(8):927-30. Epub 2007 Apr 11.

The Notch1/c-Myc pathway in T cell leukemia.

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Department of Cancer Biology and Cancer Center, University of Massachusetts Medical School, Worcester, Massachusetts 01605, USA.


The Notch receptor family and its ligands (Delta-like and Jagged) have been found deregulated in several human cancers. We and the Aster/Pear group recently identified c-myc as a direct transcriptional target gene of the Notch1 pathway in T cell acute lymphoblastic leukemia (T-ALL). Although the oncogenic roles of c-Myc and Notch1 are established, a direct link between Notch1 and c-Myc had not been demonstrated. Importantly, our work in mouse tal1 tumor cell lines revealed that leukemic growth/survival remains dependent on the Notch1-c-Myc pathway. Studies by the Efstratiadis group provide genetic evidence that the Notch1-c-Myc pathway also contributes to mouse mammary tumorigenesis. Taken together, these studies demonstrate that Notch1 mediates T cell and epithelial cell transformation at least in part by sustaining c-Myc lev.

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