Mechanical Tension Sensing in Cellular Systems

Cells constantly experience and generate mechanical forces that govern processes from embryonic development to tissue repair and disease progression. Mechanical tension sensing refers to the mechanisms by which cells detect, transmit and respond to these forces. At the molecular level, specialised proteins within the cytoskeleton and at adhesion sites change conformation under load, initiating biochemical signals that regulate gene expression, migration and shape. A range of molecular tension sensors, often based on fluorescence resonance energy transfer, DNA tethers or engineered protein modules, has revealed how forces are distributed within stress fibres, junctional complexes and the extracellular matrix interface. Insights into anisotropy of cytoskeletal tension, nanoscale organisation of adhesion receptors and force‐dependent recruitment of signalling kinases have highlighted the central role of mechanotransduction in health and disease. Understanding these pathways offers routes to novel therapies for fibrosis, vascular dysfunction and cancer metastasis.

Research from Nature Portfolio

Recent studies have deployed advanced biosensors to map tension with high spatial and temporal resolution. An intracellular module embedded within filamentous actin has shown that stress fibres and cortical actin bear distinct loads depending on cell orientation under uniaxial stretch, revealing that mechanical anisotropy in the cytoskeleton is dynamically regulated by myosin activity. In parallel, DNA‐based tension probes coupled with super-resolution microscopy have visualised single integrin receptors under load, demonstrating non-random receptor clustering at 20–30 nm intervals and direct links between ligand engagement and actin bundling. These approaches have provided unprecedented views of force distribution at both subcellular and single-molecule scales, bridging gaps between molecular mechanics and cellular function.

Mechanical Tension Sensing in Cellular Systems publication trend

The graph below shows the total number of articles in mechanical tension sensing in cellular systems across all publications each year (not limited to Nature Index journals).

Technical terms

Mechanotransduction: Conversion of mechanical forces into biochemical signals within cells.

Molecular tension sensor: A probe that reports force by changing optical properties under load.

Focal adhesion: A multiprotein complex linking the extracellular matrix to the actin cytoskeleton and transmitting mechanical forces.

Integrin: A transmembrane receptor that mediates cell–matrix adhesion and force transduction.

Fluorescence resonance energy transfer (FRET): A distance-dependent optical technique used to measure molecular conformational changes or forces.

References

1. Intracellular tension sensor reveals mechanical anisotropy of the actin cytoskeleton. Nature Communications (2023).
2. Super-resolved visualization of single DNA-based tension sensors in cell adhesion. Nature Communications (2021).
3. Selective Suppression of Integrin‐Ligand Binding by Single Molecular Tension Probes Mediates Directional Cell Migration. Advanced Science (2024).
4. Tunable molecular tension sensors reveal extension-based control of vinculin loading. eLife (2018).
5. A small proportion of Talin molecules transmit forces at developing muscle attachments in vivo. PLOS Biology (2019).