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Related Experiment Video

Updated: Sep 22, 2025

An Automated Method to Perform The In Vitro Micronucleus Assay using Multispectral Imaging Flow Cytometry

An Automated Method to Perform The In Vitro Micronucleus Assay using Multispectral Imaging Flow Cytometry

Published on: May 13, 2019

Impedance-Enabled Camera-Free Intrinsic Mechanical Cytometry.

Yongxiang Feng¹, Huichao Chai¹, Weihua He¹

¹State Key Laboratory of Precision Measurement Technology and Instrument, Department of Precision Instrument, Tsinghua University, Beijing, 100084, P. R. China.

|May 20, 2022

Summary

This summary is machine-generated.

Camera-free intrinsic mechanical cytometry (CFIMC) measures single-cell mechanics without complex imaging. This method quantifies cell stiffness and fluidity, offering a new tool for label-free cell analysis.

Keywords:

cell mechanics flow cytometry impedance signals intrinsic properties single-cell analysis

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Lensless On-chip Imaging of Cells Provides a New Tool for High-throughput Cell-Biology and Medical Diagnostics

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Published on: December 14, 2009

Area of Science:

Biophysics
Cell Biology
Biomedical Engineering

Background:

Single-cell mechanical properties are crucial biomarkers.
Current measurement methods are often expensive and complex.
Standardization of mechanical property measurements across platforms is needed.

Purpose of the Study:

To introduce camera-free intrinsic mechanical cytometry (CFIMC) for label-free, on-the-fly measurement of single-cell mechanical properties.
To enable comparable mechanical property measurements across different platforms.
To analyze intrinsic mechanical parameters like Young's modulus (E) and fluidity (β).

Main Methods:

CFIMC couples impedance electrodes with a constriction channel.
Cell deformation is measured via impedance signals as cells pass through.
Intrinsic mechanical parameters are derived from deformation data.

Main Results:

CFIMC achieves high throughput (>500 cells/min).
It successfully differentiates mechanical properties of cancer vs. normal cells (MCF-10A, MCF-7, MDA-MB-231).
Distinguishes between living and fixed cells, and detects effects of cytoskeleton perturbations, with Cytochalasin B showing effects at 1 µM.

Conclusions:

CFIMC offers a high-throughput, real-time method for single-cell mechanical analysis.
It provides a cost-effective and accessible alternative to complex imaging systems.
This technique facilitates label-free biomarker discovery and drug screening.