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Proc Natl Acad Sci U S A. 2013 Jan 29;110(5):1686-91. doi: 10.1073/pnas.1221147110. Epub 2013 Jan 14.

Minimization of thermodynamic costs in cancer cell invasion.

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1
Key Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100864, China.

Abstract

Metastasis, the truly lethal aspect of cancer, occurs when metastatic cancer cells in a tumor break through the basement membrane and penetrate the extracellular matrix. We show that MDA-MB-231 metastatic breast cancer cells cooperatively invade a 3D collagen matrix while following a glucose gradient. The invasion front of the cells is a dynamic one, with different cells assuming the lead on a time scale of 70 h. The front cell leadership is dynamic presumably because of metabolic costs associated with a long-range strain field that precedes the invading cell front, which we have imaged using confocal imaging and marker beads imbedded in the collagen matrix. We suggest this could be a quantitative assay for an invasive phenotype tracking a glucose gradient and show that the invading cells act in a cooperative manner by exchanging leaders in the invading front.

PMID:
23319630
PMCID:
PMC3562811
DOI:
10.1073/pnas.1221147110
[Indexed for MEDLINE]
Free PMC Article
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