Signaling networks guiding epithelial–mesenchymal transitions during embryogenesis and cancer progression

Cancer Science - Tập 98 Số 10 - Trang 1512-1520 - 2007
Aristidis Moustakas1, Carl‐Henrik Heldin1
1Ludwig Institute for Cancer Research, Uppsala University, Box 595, Biomedical Center, SE-751 24 Uppsala, Sweden

Tóm tắt

Epithelial–mesenchymal transition (EMT) describes the differentiation switch between polarized epithelial cells and contractile and motile mesenchymal cells, and facilitates cell movements and generation of new tissue types during embryogenesis. Many secreted polypeptides are implicated in the EMT process and their corresponding intracellular transduction pathways form highly interconnected networks. Transforming growth factor‐β, Wnt, Notch and growth factors acting through tyrosine kinase receptors induce EMT and often act in a sequential manner. Such growth factors orchestrate the concerted regulation of an elaborate gene program and a complex protein network, needed for establishment of new mesenchymal phenotypes after disassembly of the main elements of epithelial architecture, such as desmosomes, as well as tight, adherens and gap junctions. EMT of tumor cells occurs during cancer progression and possibly generates cell types of the tumor stroma, such as cancer‐associated myofibroblasts. EMT contributes to new tumor cell properties required for invasiveness and vascular intravasation during metastasis. Here we present some of the current mechanisms that mediate the process of EMT and discuss their relevance to cancer progression. (Cancer Sci 2007; 98: 1512–1520)

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Cancer Science

Tập 98 Số 10

1512-1520

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