Abstract
Cell adhesive force transmitted by integrins or other mechanosensitive receptors is critical for many cellular functions and biological development. Visualization and quantification of such force have been long desired and practiced in cell mechanobiology. Here we describe integrative tension sensor (ITS), a dsDNA-based tension sensor that coverts invisible force signal to fluorescence and enables cell adhesive force imaging with ultra-sensitivity. ITS can be selectively implemented at two imaging modes: a cumulative mode that maps cell adhesive force at a high signal-to-noise ratio even with a low-end fluorescence microscope, and a real-time mode that images the force at the single molecular tension level.
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