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Evaluation of Cancer Stem Cell Migration Using Compartmentalizing Microfluidic Devices and Live Cell Imaging
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Evaluation of Cancer Stem Cell Migration Using Compartmentalizing Microfluidic Devices and Live Cell Imaging

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Differential contractility regulates cancer stem cell migration.

Rachel K Heussner1, Hongrong Zhang2, Guhan Qian2

  • 1Department of Biomedical Engineering, University of Minnesota, Minneapolis, Minnesota; University of Minnesota Physical Sciences in Oncology Center, Minneapolis, Minnesota.

Biophysical Journal
|February 11, 2023
PubMed
Summary
This summary is machine-generated.

Cancer stem cells (CSCs) show significantly higher motility than differentiated cells across various environments. This enhanced migration is linked to reduced contractility and focal adhesions in CSCs.

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Area of Science:

  • Cell Biology
  • Cancer Research
  • Biophysics

Background:

  • Cancer stem cells (CSCs) possess high tumor-initiating and metastatic potential.
  • Previous work showed breast CSCs have enhanced motility in aligned collagen matrices.

Purpose of the Study:

  • To investigate CSC motility across diverse microenvironments.
  • To elucidate the mechanical basis of CSC migration differences.
  • To explore therapeutic modulation of CSC migration.

Main Methods:

  • Assessing CSC and whole population (WP) motility on 2D gels, 3D collagen, and brain slices.
  • Analyzing cell contractility and focal adhesion dynamics.
  • Pharmacologically modulating myosin II and microtubule stability.

Main Results:

  • CSCs consistently exhibited twofold higher motility than WP across tested platforms.
  • CSCs displayed reduced contractility and fewer, smaller focal adhesions.
  • Myosin II inhibition increased WP motility; microtubule disruption or enhanced contractility decreased CSC motility.

Conclusions:

  • CSC migration is mechanistically distinct from WP migration, driven by lower contractility.
  • Targeting contractile forces or microtubules may differentially affect CSC vs. WP motility.
  • Understanding these differences has implications for cancer metastasis and therapy.