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Microhand Platform Equipped with Plate-Shaped End-Effectors Enables Precise Probing of Intracellular Structure
Masahiro Kawakami1, Masaru Kojima1, Toshihiko Ogura2
1Department of Materials Engineering Science, Division of Chemical Engineering, Graduate School of Engineering Science, The University of Osaka, 1-3 Machikaneyama-cho, Toyonaka 560-8531, Osaka, Japan.
Micromachines
|November 27, 2025
Summary
A new microhand system precisely measures single-cell mechanics, revealing disease-related changes in cellular stiffness. This technology aids in understanding cell mechanics and identifying disease biomarkers.
Area of Science:
- Biophysics
- Cell Biology
- Biomedical Engineering
Background:
- Cellular mechanical properties serve as crucial indicators of cell state and potential disease biomarkers.
- Accurate measurement of cell mechanics is essential for understanding cellular function and disease progression.
Purpose of the Study:
- To introduce a novel microhand system for high-precision, stable single-cell mechanical characterization.
- To automate force sensor calibration for improved efficiency and reliability.
- To validate the system's sensitivity in detecting subcellular mechanical contributions and disease-induced alterations.
Main Methods:
- Development of a microhand system with plate-shaped end-effectors for cell manipulation.
- Automated force sensor calibration.
- Quantification of cellular and subcellular mechanics using controlled indentation.
- Application of chemical treatments (Cytochalasin D, Trichostatin A) to modulate cytoskeletal and chromatin components.
- Analysis of cellular mechanical properties in a Hutchinson-Gilford progeria syndrome model.
Main Results:
- The microhand system achieved stable and high-precision single-cell mechanical characterization.
- Automated calibration enhanced the efficiency and reliability of force sensing.
- Mechanical contributions of the actin cytoskeleton and chromatin were precisely quantified.
- Distinct mechanical alterations, including a high-stiffness cell population, were detected in a progeria cell model.
- Differential evaluation of cytoplasm and nucleus mechanical properties was achieved by controlling indentation parameters.
Conclusions:
- The developed microhand system is a sensitive and robust platform for cell mechanics research.
- The system can detect subtle, disease-related mechanical changes in cells.
- It enables the elucidation of subcellular structure contributions to overall cell mechanics.
- This technology holds promise for identifying novel cellular biomarkers for diseases.
