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High-Throughput Characterization of Cell Adhesion Strength Using Long-Channel Constriction-Based Microfluidics.

Mingji Wei1,2, Fei Zhang1, Rongbiao Zhang1

  • 1School of Electrical and Information Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China.

ACS Sensors
|July 19, 2021
PubMed
Summary
This summary is machine-generated.

We developed a new microfluidic method to measure cancer cell adhesion strength, a key factor in metastasis. This approach accurately quantifies cell adhesion despite variations in cell size, improving cancer research tools.

Keywords:
cell adhesion strengthcell transit velocityfriction coefficientlong-channel constriction-based microfluidicsmechanical phenotype characterizationsingle cell

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Area of Science:

  • Biophysics
  • Cancer Biology
  • Microfluidics

Background:

  • Cancer cell adhesion strength is a critical biophysical marker for metastatic potential.
  • Existing high-throughput methods using microfluidics struggle to accurately assess cell adhesion due to cell size heterogeneity.
  • Understanding cell adhesion is vital for studying cancer cell escape from primary tumors and circulating tumor cell (CTC) anchoring.

Purpose of the Study:

  • To develop a high-throughput microfluidic approach for accurately assessing cancer cell adhesion strength.
  • To overcome the limitations of cell size heterogeneity in adhesion strength measurements.
  • To establish a reliable method for characterizing the mechanical phenotypes of cancer cells.

Main Methods:

  • Proposed a novel high-throughput method using a long-channel constriction microfluidic device.
  • Utilized a friction coefficient based on the constant velocity stage of cell transit.
  • Employed a compressed spring model to account for cell deformation and reduce the influence of cell size heterogeneity.

Main Results:

  • Demonstrated that cell size is independent of adhesion strength but significantly affects transit velocity.
  • The proposed model effectively offsets the influence of cell size heterogeneity on adhesion measurements.
  • A strong linear relationship was observed between the friction coefficient and the logarithm of adhesion strength.

Conclusions:

  • The developed friction coefficient-based microfluidic approach enables accurate, high-throughput characterization of cancer cell adhesion strength.
  • This method enriches the functionality of constriction-based microfluidics for mechanical phenotype analysis.
  • The findings offer new insights into the biophysical properties of cancer cells relevant to metastasis.