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Microchip reveals how tumor cells transition to invasion
Date:8/17/2014

PROVIDENCE, R.I. [Brown University] Using a microengineered device that acts as an obstacle course for cells, researchers have shed new light on a cellular metamorphosis thought to play a role in tumor cell invasion throughout the body.

The epithelial-mesenchymal transition (EMT) is a process in which epithelial cells, which tend to stick together within a tissue, change into mesenchymal cells, which can disperse and migrate individually. EMT is a beneficial process in developing embryos, allowing cells to travel throughout the embryo and establish specialized tissues. But recently it has been suggested that EMT might also play a role in cancer metastasis, allowing cancer cells to escape from tumor masses and colonize distant organs.

For this study, published in the journal Nature Materials, the researchers were able to image cancer cells that had undergone EMT as they migrated across a device that mimics the tissue surrounding a tumor.

"People are really interested in how EMT works and how it might be associated with tumor spread, but nobody has been able to see how it happens," said lead author Ian Y. Wong, assistant professor in the Brown School of Engineering and the Center for Biomedical Engineering, who performed the research as a postdoctoral fellow at Massachusetts General Hospital. "We've been able to image these cells in a biomimetic system and carefully measure how they move."

The experiments showed that the cells displayed two modes of motion. A majority plod along together in a collectively advancing group, while a few cells break off from the front, covering larger distances more quickly.

"In the context of cell migration, EMT upgrades cancer cells from an economy model to a fast sports car," Wong said. "Our technology enabled us to track the motion of thousands of 'cars' simultaneously, revealing that many sports cars get stuck in traffic jams with the economy cars, but that some sports cars br
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Contact: Kevin Stacey
kevin_stacey@brown.edu
401-863-3766
Brown University
Source:Eurekalert  

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