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Related Concept Videos

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The development of flow cytometry techniques began in 1934 with initial attempts by Andrew Moldavan, a bacteriologist who counted the cells in a flowing capillary system. Moldavan pumped cells through a capillary tube focused under a microscope for visualization. The invention of photometry allowed the measurement of differentially-stained cells, and Louis Kamentsky developed the first multiparameter flow cytometer in 1965 to identify and count the cancer cells in cervical tissue specimens.
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Related Experiment Video

Updated: Mar 25, 2026

Quantitative Analysis of Viscoelastic Properties of Red Blood Cells Using Optical Tweezers and Defocusing Microscopy
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Quantitative Analysis of Viscoelastic Properties of Red Blood Cells Using Optical Tweezers and Defocusing Microscopy

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FACS-style detection for real-time cell viscoelastic cytometry.

A Kasukurti1, C D Eggleton2, S A Desai3

  • 1Department of Chemical and Biological Engineering, Colorado School of Mines.

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|February 23, 2016
PubMed
Summary
This summary is machine-generated.

Researchers developed a new viscoelasticity cytometer (VC) to measure cell mechanical properties in real-time. This label-free technology offers a high-throughput method for assessing cell health and viability without damaging cells.

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Area of Science:

  • Biophysics
  • Cell Biology
  • Biomedical Engineering

Background:

  • Cell mechanical properties serve as label-free biophysical markers for cell viability and health.
  • Current real-time methods for measuring cell mechanics lack throughput and non-destructive capabilities.
  • A need exists for easily implemented, real-time technology to track cell mechanics, especially for fluorescence-activated cell sorting (FACS) compatible applications.

Purpose of the Study:

  • To introduce a novel viscoelasticity cytometer (VC) for real-time, continuous measurement of cell mechanical properties.
  • To address the limitations of current technologies in high-throughput, non-destructive mechanical property analysis.
  • To enable label-free tracking of cell mechanics compatible with FACS-style detection.

Main Methods:

  • Development of a viscoelasticity cytometer (VC) utilizing modulated optical forces.
  • Implementation of a low-dimensional, FACS-style detection method for efficient data acquisition.
  • Tracking of high-frequency cell physical properties in chemically-modified cell populations.

Main Results:

  • The viscoelasticity cytometer (VC) achieved real-time and continuous measurements of cell viscoelasticity.
  • The system demonstrated utility in tracking mechanical properties of cell populations at rates of approximately 1 Hz.
  • Observations were explained within the framework of a simple theoretical model, validating the VC's performance.

Conclusions:

  • The developed viscoelasticity cytometer (VC) provides a viable solution for label-free, real-time measurement of cell mechanical properties.
  • This technology offers significant potential for high-throughput analysis of cell health and viability.
  • The FACS-style detection method facilitates integration into existing cell analysis workflows.