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Updated: Sep 11, 2025

High-resolution Imaging of Nuclear Dynamics in Live Cells under Uniaxial Tensile Strain

High-resolution Imaging of Nuclear Dynamics in Live Cells under Uniaxial Tensile Strain

Published on: June 2, 2019

Super-Resolution Axial Imaging for Quantifying Piconewton Traction Forces in Live Cells.

Dong-Xia Wang^1,2,3, José Ignacio Gallea¹, De-Ming Kong²

¹Third Institute of Physics - Biophysics, Georg August University, Friedrich-Hund-Platz 1, 37077, Göttingen, Germany.

Angewandte Chemie (International Ed. in English)

|August 18, 2025

Summary

This summary is machine-generated.

Researchers developed metal-induced energy transfer-based tension probe microscopy (MIET-TPM) to measure axial cell forces with nanometer precision. This breakthrough allows detailed mapping of cellular mechanical forces, crucial for understanding biological processes.

Keywords:

Fluorescence lifetime imaging microscopy Mechanochemical biology Metal‐induced energy transfer imaging Molecular tension probe Super‐resolution imaging

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Area of Science:

Cellular mechanobiology
Biophysics
Microscopy

Background:

Cell mechanics are vital for biological processes.
Current microscopy methods struggle with high-resolution axial force measurement.
Nanometer-scale axial force mapping is a significant challenge.

Purpose of the Study:

To introduce a novel technique for high-resolution axial force mapping.
To enable simultaneous imaging of plasma membrane and force-exerting molecules.
To provide insights into nanoscale force transmission mechanisms.

Main Methods:

Metal-induced energy transfer-based tension probe microscopy (MIET-TPM).
Integration of MIET imaging with DNA-hairpin molecular tension probes (MTPs).
Application on standard fluorescence microscopy setups without hardware modification.

Main Results:

Achieved nanometer precision in axial force measurement.
Mapped axial integrin tension in focal adhesions and podosomes.
Correlated force mapping with plasma membrane height profiles.

Conclusions:

MIET-TPM offers unprecedented axial force resolution.
The technique provides detailed insights into cellular force transmission.
MIET-TPM is a versatile and accessible tool for mechanobiology research.