New wrinkling substrate assay reveals traction force fields of leader and follower cells undergoing collective migration
| Autor: | Sho Yokoyama, Tsubasa S. Matsui, Shinji Deguchi |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Silicon Materials science Traction (engineering) Biophysics Apoptosis Biocompatible Materials Nanotechnology 02 engineering and technology Elastomer Biochemistry Madin Darby Canine Kidney Cells PHYSICAL FORCES Collective migration 03 medical and health sciences Dogs Cell Movement Cell Adhesion Cluster (physics) Animals Molecular Biology Long axis Tractive force Epithelial Cells Cell Biology 021001 nanoscience & nanotechnology 030104 developmental biology Oxygen plasma 0210 nano-technology |
| Zdroj: | Biochemical and Biophysical Research Communications. 482:975-979 |
| ISSN: | 0006-291X |
| DOI: | 10.1016/j.bbrc.2016.11.142 |
| Popis: | Physical forces play crucial roles in coordinating collective migration of epithelial cells, but details of such force-related phenomena remain unclear partly due to the lack of robust methodologies to probe the underlying force fields. Here we develop a method for fabricating silicone substrates that detect cellular traction forces with a high sensitivity. Specifically, a silicone elastomer is exposed to oxygen plasma under heating. Removal of the heat shrinks the substrate so as to reduce its critical buckling strain in a spatially uniform manner. Thus, even small cellular traction forces can be visualized as micro-wrinkles that are reversibly emerged on the substrate in a direction orthogonal to the applied forces. Using this technique, we show that so-called leader cells in MDCK-II cell clusters exert significant magnitudes of traction forces distinct from those of follower cells. We reveal that the direction of traction forces is highly correlated with the long axis of the local, individual cells within clusters. These results suggest that the force fields in collective migration of MDCK-II cells are predominantly determined locally at individual cell scale rather than globally at the whole cell cluster scale. |
| Databáze: | OpenAIRE |
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