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Cell migration in gut homeostasis and cancer invasion role of microenvironment

The entire intestinal epithelium is renewed every week due to cell division in the crypts coupled with cell migration towards the villi and loss of cells by apoptosis at the tip of villi. Uncoupling cell proliferation from apoptos... ver más

31/12/2017

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1M€

Presupuesto del proyecto: 1M€

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INSTITUT CURIE No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

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Financiación concedida El organismo FP7 notifico la concesión del proyecto el día 2017-12-31 No tenemos la información de la convocatoria

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INSTITUT CURIE No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 1M€

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Descripción del proyecto The entire intestinal epithelium is renewed every week due to cell division in the crypts coupled with cell migration towards the villi and loss of cells by apoptosis at the tip of villi. Uncoupling cell proliferation from apoptosis and possibly from cell migration can lead to pathologies such as cancer. In carcinoma in situ, the basement membrane (BM) represents a physical barrier that prevents spreading of the primary tumor to adjacent tissues. It is believed that cancer cells perforate BM, but stromal cells such as carcinoma-associated fibroblasts (CAFs) also secrete matrix proteinases. Thus, the question is who is invading whom – do cancer cells invade the stroma or is the stroma invading tumor cells? Here we propose an innovative multi-disciplinary approach, at the interface of cancer cell biology and physics, combined with recent advances in optics aimed to unravel the fundamental mechanisms of cell migration in 3D environments during intestinal homeostasis and tumor invasion. Our specific aims are: 1. Determine the mechanism of epithelial cell migration in gut homeostasis. Using intestinal slice cultures and two-photon microscopy we will determine if epithelial cells migrate using cellular protrusions, are pushed by dividing cells, or are transported by underlying fibroblasts and BM. 2. Examine if cancer cells and CAFs cooperate to break the BM. We will use a 3D in vitro model to determine which cell type is degrading BM and if distinct sub-populations of CAFs have different functions. 3. Explore how cancer cells and CAFs cooperate during invasion of the stroma. 3D chemoattraction assays will be used to determine if CAFs can guide cancer cells towards blood vessels. 4. Characterize cooperation of cancer cells and CAFs in vivo. Using intravital imaging we will analyze interactions between cancer cells and CAFs in the primary tumor. Ortotopic mouse models will be used to determine if a specific sub-population of CAFs can trigger metastasis of colon cancer.

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