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Tumor maintenance relies on continued activity of driver oncogenes, although their rate-limiting role is highly context dependent. Oncogenic Kras mutation is the signature event in pancreatic ductal adenocarcinoma (PDAC), serving a critical role in tumor initiation. Here, an inducible Kras G12D -driven PDAC mouse model establishes that advanced PDAC remains strictly dependent on Kras G12D...
BMP and Wnt signaling pathways control essential cellular responses through activation of the transcription factors SMAD (BMP) and TCF (Wnt). Here, we show that regeneration of hematopoietic lineages following acute injury depends on the activation of each of these signaling pathways to induce expression of key blood genes. Both SMAD1 and TCF7L2 co-occupy sites with master regulators adjacent to hematopoietic...
Homologous recombination (HR) is an important conserved process for DNA repair and ensures maintenance of genome integrity. Inappropriate HR causes gross chromosomal rearrangements and tumorigenesis in mammals. In yeast, the Srs2 helicase eliminates inappropriate recombination events, but the functional equivalent of Srs2 in higher eukaryotes has been elusive. Here, we identify C. elegans RTEL-1 as...
Tumorigenesis is a multistep process characterized by a myriad of genetic and epigenetic alterations. Identifying the causal perturbations that confer malignant transformation is a central goal in cancer biology. Here we report an RNAi-based genetic screen for genes that suppress transformation of human mammary epithelial cells. We identified genes previously implicated in proliferative control and...
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