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http://www.sciencedirect.com –
Oncologists often diagnose cancer based on a change of tissue stiffness sensed by palpation, yet cancer researchers generally focus on biochemical signaling mechanisms. Tumors are more rigid because they have a stiffer extracellular matrix. A new study shows that this alteration of matrix mechanics activates integrins, which not only promotes mitogenic signaling through Erk but also cell contractility through Rho, which can further increase matrix stiffness. This establishes a positive feedback loop that switches on the malignant phenotype in mammary epithelial cells. Read more »
Year of publication:
2005
Journal name:
Cancer Cell
Tumor cell cycle arrest induced by shear stress: Roles of integrins and Smad
http://www.ncbi.nlm.nih.gov –
Interstitial flow in and around tumor tissue affects the mechanical microenvironment to modulate tumor cell growth and metastasis. We investigated the roles of flow-induced shear stress in modulating cell cycle distribution in four tumor cell lines and the underlying mechanisms. In all four cell lines, incubation under static conditions for 24 or 48 h led to G0/G1 arrest; in contrast, shear stress (12 dynes/cm2) induced G2/M arrest. The molecular basis of the shear effect was analyzed, and the presentation on molecular mechanism is focused on human MG63 osteosarcoma cells. Read more »
Year of publication:
2008
Journal name:
The National Academy of Sciences of the USA
Category: Cancer Cells Tags: