Quantifying force transmission through fibroblasts: changes of traction forces under external shearing
Mammalian cells have evolved complex mechanical connections to their microenvironment, including focal adhesion clusters that physically connect the cytoskeleton and the extracellular matrix. This mechanical link is also part of the cellular machinery to transduce, sense and respond to external forc...
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| Hauptverfasser: | , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2022
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| In: |
European biophysics journal
Year: 2022, Jahrgang: 51, Heft: 2, Pages: 157-169 |
| ISSN: | 1432-1017 |
| DOI: | 10.1007/s00249-021-01576-8 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1007/s00249-021-01576-8
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| Verfasserangaben: | Steven Huth, Johannes W. Blumberg, Dimitri Probst, Jan Lammerding, Ulrich S. Schwarz, Christine Selhuber-Unkel |
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| 245 | 1 | 0 | |a Quantifying force transmission through fibroblasts |b changes of traction forces under external shearing |c Steven Huth, Johannes W. Blumberg, Dimitri Probst, Jan Lammerding, Ulrich S. Schwarz, Christine Selhuber-Unkel |
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| 520 | |a Mammalian cells have evolved complex mechanical connections to their microenvironment, including focal adhesion clusters that physically connect the cytoskeleton and the extracellular matrix. This mechanical link is also part of the cellular machinery to transduce, sense and respond to external forces. Although methods to measure cell attachment and cellular traction forces are well established, these are not capable of quantifying force transmission through the cell body to adhesion sites. We here present a novel approach to quantify intracellular force transmission by combining microneedle shearing at the apical cell surface with traction force microscopy at the basal cell surface. The change of traction forces exerted by fibroblasts to underlying polyacrylamide substrates as a response to a known shear force exerted with a calibrated microneedle reveals that cells redistribute forces dynamically under external shearing and during sequential rupture of their adhesion sites. Our quantitative results demonstrate a transition from dipolar to monopolar traction patterns, an inhomogeneous distribution of the external shear force to the adhesion sites as well as dynamical changes in force loading prior to and after the rupture of single adhesion sites. Our strategy of combining traction force microscopy with external force application opens new perspectives for future studies of force transmission and mechanotransduction in cells. | ||
| 650 | 4 | |a Cell adhesion | |
| 650 | 4 | |a Mechanobiology | |
| 650 | 4 | |a Micromanipulation | |
| 650 | 4 | |a Traction force microscopy | |
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