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Long-term imaging of cellular forces with high precision by elastic resonator interference stress microscopy

Nature Cell Biology, ISSN: 1476-4679, Vol: 19, Issue: 7, Page: 864-872
2017
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University of St Andrews: advanced new microscopy technique may help us understand cancer cells find their way through the body

Scientists at the University of St Andrews have developed a new microscopy method that analyses interference patterns to create images of the forces living cells

Article Description

Cellular forces are crucial for many biological processes but current methods to image them have limitations with respect to data analysis, resolution and throughput. Here, we present a robust approach to measure mechanical cell-substrate interactions in diverse biological systems by interferometrically detecting deformations of an elastic micro-cavity. Elastic resonator interference stress microscopy (ERISM) yields stress maps with exceptional precision and large dynamic range (2 nm displacement resolution over a >1 μm range, translating into 1 pN force sensitivity). This enables investigation of minute vertical stresses (<1 Pa) involved in podosome protrusion, protein-specific cell-substrate interaction and amoeboid migration through spatial confinement in real time. ERISM requires no zero-force reference and avoids phototoxic effects, which facilitates force monitoring over multiple days and at high frame rates and eliminates the need to detach cells after measurements. This allows observation of slow processes such as differentiation and further investigation of cells, for example, by immunostaining.

Bibliographic Details

Kronenberg, Nils M; Liehm, Philipp; Steude, Anja; Knipper, Johanna A; Borger, Jessica G; Scarcelli, Giuliano; Franze, Kristian; Powis, Simon J; Gather, Malte C

Springer Science and Business Media LLC

Biochemistry, Genetics and Molecular Biology

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