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Related Experiment Video

Updated: May 27, 2026

A Photopolymerizable Hyaluronic Acid-Collagen Model of the Invasive Glioma Microenvironment with Interstitial Flow
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Hydrodynamic cellular volume changes enable glioma cell invasion.

Stacey Watkins1, Harald Sontheimer

  • 1Department of Neurobiology, Center for Glial Biology in Medicine, University of Alabama at Birmingham, Birmingham, Alabama 35294, USA.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|November 25, 2011
PubMed
Summary

Invading glioma cells significantly reduce their volume by releasing water to navigate the brain

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Area of Science:

  • Neuro-oncology
  • Cellular Biology
  • Biophysics

Background:

  • Malignant gliomas are aggressive brain tumors with poor prognoses.
  • Glioma invasion differs from other cancers, occurring along brain's extracellular matrix.
  • Current treatments for malignant gliomas are largely ineffective.

Purpose of the Study:

  • To visualize and quantify cell volume changes during glioma invasion.
  • To understand the mechanisms driving glioma cell volume alterations.
  • To identify potential therapeutic targets for inhibiting glioma invasion.

Main Methods:

  • Utilized three-dimensional multiphoton and confocal time-lapse microscopy.
  • Employed in vivo (scid mice) and in vitro (Boyden chamber) models.
  • Performed osmotic challenges to investigate cellular water dynamics.

Main Results:

  • Invading glioma cells maximally decreased their volume by 30-35%.
  • This volume reduction requires the release of all free cytoplasmic water.
  • Inhibition of chloride (Cl(-)) flux blocked volume changes and invasion.

Conclusions:

  • Glioma cells utilize hydrodynamic volume changes to overcome spatial constraints during brain invasion.
  • The process involves osmotic water release, driven by chloride ion transport.
  • Targeting chloride flux presents a potential strategy to inhibit malignant glioma invasion.