Mechanical Characterization of Cellular Systems

Mechanical characterisation of cellular systems interrogates cells’ intrinsic material properties across scales from single molecules to tissues. By applying controlled forces via techniques such as atomic force microscopy, optical stretching, microfluidic flow or acoustic trapping, researchers quantify parameters including stiffness, viscosity and viscoelastic relaxation. These properties reflect cytoskeletal organisation, membrane tension and intracellular architecture, informing on cell state, differentiation, disease progression and tissue mechanics. Advances in high-throughput deformability cytometry and label-free phenotyping have transformed the field, enabling rapid assessment of hundreds to thousands of cells per second without molecular markers. Insights gleaned underpin diagnostics, drug screening and tissue engineering, by linking mechanical phenotype to functional behaviour in contexts ranging from cancer metastasis to stem cell development. Integration of mechanical metrics with genomic, proteomic and electrical measurements promises a holistic view of cell biology and novel biomarkers for clinical applications.

Research from Nature Portfolio

Recent studies have demonstrated rapid label-free phenotyping of mechanically dissociated biopsy samples. By combining enzyme-free tissue dissociation with real-time deformability cytometry at rates up to 1,000 cells per second and machine-learning analysis, this approach distinguishes healthy and diseased tissue intraoperatively, offering diagnostic support without molecular staining. Another development employs dynamic real-time deformability cytometry, leveraging microfluidic hydrodynamic stresses and Fourier decomposition to extract frequency-dependent viscoelastic parameters independent of cell shape. Achieving up to 100 cells per second, this method disentangles elastic and viscous responses, enabling discrimination of blood cell subpopulations by rheological fingerprint and expanding applications to complex samples in whole blood.

Mechanical Characterization of Cellular Systems publication trend

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

Technical terms

Viscoelasticity: Property of materials exhibiting both viscous flow and elastic deformation under stress.

Deformability cytometry: High-throughput technique that measures cell deformation in flow to infer mechanical properties.

Young’s modulus: Measure of elastic stiffness, quantifying the stress required to achieve a given strain.

Microfluidics: Manipulation of fluids in channels with dimensions of tens to hundreds of micrometres, enabling precise control of cell environments.

References

1. Rapid single-cell physical phenotyping of mechanically dissociated tissue biopsies. Nature Biomedical Engineering (2023).
2. High-throughput single-cell rheology in complex samples by dynamic real-time deformability cytometry. Nature Communications (2019).
3. Multi‐Zone Visco‐Node‐Pore Sensing: A Microfluidic Platform for Multi‐Frequency Viscoelastic Phenotyping of Single Cells. Advanced Science (2024).
4. Single-cell electro-mechanical shear flow deformability cytometry. Microsystems & Nanoengineering (2024).