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Related Experiment Video

Updated: May 31, 2026

Quantification of Cellular Densities and Antigenic Properties using Magnetic Levitation

Quantification of Cellular Densities and Antigenic Properties using Magnetic Levitation

Published on: May 17, 2021

Measuring single-cell density.

William H Grover¹, Andrea K Bryan, Monica Diez-Silva

¹Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

Proceedings of the National Academy of Sciences of the United States of America

|June 22, 2011

Summary

This summary is machine-generated.

This study introduces a microfluidic sensor for precise single-cell density measurement. This method reveals subtle cellular changes, aiding in disease detection and treatment monitoring.

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Area of Science:

Biophysics
Cell Biology
Biotechnology

Background:

Measuring single-cell properties is crucial for understanding cellular heterogeneity and function.
Traditional methods often lack the precision or throughput to detect subtle changes in cell state.

Purpose of the Study:

To develop and validate a microfluidic mass sensor for high-throughput, precise single-cell density measurement.
To demonstrate the utility of single-cell density measurements in identifying distinct cellular states and processes.

Main Methods:

Utilized a microfluidic device to weigh individual living cells in fluids of varying densities.
Achieved measurements of mass, volume, and density for approximately 500 cells per hour.
Attained a density precision of 0.001 g mL(-1).

Main Results:

Observed that cell density variation is significantly smaller (nearly 100-fold) than mass or volume variation.
Demonstrated the ability to detect cellular process-specific density changes.
Successfully identified malaria-infected erythrocytes, transfused blood cells, irreversibly sickled cells, and early-stage drug-treated leukemia cells.

Conclusions:

Single-cell density measurement offers a sensitive approach to detect cellular state changes.
This technique has broad applications in diagnostics, disease monitoring, and drug development.
The high precision and throughput of the microfluidic sensor enable previously undetectable biological insights.