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Traction force microscopy
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Traction force microscopy : ウィキペディア英語版
Traction force microscopy

Traction Force Microscopy (TFM) is an experimental method for determining the tractions on the surface of a biological cell by obtaining measurements of the surrounding displacement field within an ''in vitro'' extracellular matrix (ECM).
==Overview==

The dynamic mechanical behavior of cell-ECM and cell-cell interactions is known to influence a vast range of cellular functions, including necrosis, differentiation, adhesion, migration, locomotion, and growth. TFM utilizes experimentally observed ECM displacements to calculate the traction, or stress vector, at the surface of a cell.
Before TFM, efforts observed cellular tractions on silicone rubber substrata wrinkling around cells;〔AK Harris, P Wild, and D Stopak. Silicone rubber substrata: a new wrinkle in the study of cell locomotion. Science, 208(4440):177–179, 1980.〕 however, accurate quantification of the tractions in such a technique is difficult due to the nonlinear and unpredictable behavior of the wrinkling. Several years later, the terminology TFM was introduced to describe a more advanced computational procedure that was created to convert measurements of substrate deformation into estimated traction stresses.〔S Munevar, Y Wang, and M Dembo. Traction force microscopy of migrating normal and h-ras transformed 3t3 fibroblasts. Biophysical journal, 80(4):1744–1757, 2001.〕

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