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Accession IconSRP149630

RNA sequence analysis of stable versus reversible EMT events and the resultant metastases

Organism Icon Homo sapiens
Sample Icon 8 Downloadable Samples
Technology Badge IconIllumina HiSeq 2500

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Description
The ability of breast cancer cells to transiently transition between epithelial and mesenchymal states is critical to complete the metastatic process. In contrast, induction of epithelial-mesenchymal transition (EMT) through the acquisition of drug persistence is a more stable event. Herein, we utilize Her2 transformed human mammary epithelial (HMLE) cells to compare a reversible model of EMT induced by TGF-beta to a stable mesenchymal phenotype induced by chronic exposure to the ErbB kinase inhibitor, lapatinib. Indeed, only a TGF-beta cells capable of returning to an epithelial phenotype resulted in long bone metastasis (BM). These four cell populations were anylzed by RNA sequencing. Overall design: The Her2 transformed HMLE cells are referred to as the parental (Par) cell line and serves as the control. These cells were treated with TGF-beta every three days for a period of 4 weeks to induce EMT (TGFB). Alternatively, the parental cells were treated with 1 micromolar of lapatinib every three days also for 4 weeks and a proliferative drug resistant population (LAPR) emerged. The TGF-beta treated cells were engrafted onto the mammary fatpad and resultant long bone metasases (BM) were isolated and subcluted ex-vivo.
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8
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