Details

Autor(en) / Beteiligte

• Stubb, Aki
• Laine, Romain F
• Miihkinen, Mitro
• Hamidi, Hellyeh
• Guzmán, Camilo
• Henriques, Ricardo
• Jacquemet, Guillaume
• Ivaska, Johanna

Titel

Fluctuation-Based Super-Resolution Traction Force Microscopy

Ist Teil von

• Nano letters, 2020-04, Vol.20 (4), p.2230-2245

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2020

Quelle

MEDLINE

Beschreibungen/Notizen

• Cellular mechanics play a crucial role in tissue homeostasis and are often misregulated in disease. Traction force microscopy is one of the key methods that has enabled researchers to study fundamental aspects of mechanobiology; however, traction force microscopy is limited by poor resolution. Here, we propose a simplified protocol and imaging strategy that enhances the output of traction force microscopy by increasing i) achievable bead density and ii) the accuracy of bead tracking. Our approach relies on super-resolution microscopy, enabled by fluorescence fluctuation analysis. Our pipeline can be used on spinning-disk confocal or widefield microscopes and is compatible with available analysis software. In addition, we demonstrate that our workflow can be used to gain biologically relevant information and is suitable for fast long-term live measurement of traction forces even in light-sensitive cells. Finally, using fluctuation-based traction force microscopy, we observe that filopodia align to the force field generated by focal adhesions.