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Updated: May 31, 2025

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Visualization of Apical-Basal Stress Polarity Regulating Directed Cell Migration with a FRET-Based Biosensor.

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Tumor cells exhibit intrinsic apical-basal stress polarity, crucial for migration. Disrupting this polarity significantly reduces cell migration, suggesting a new therapeutic target for metastasis.

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Area of Science:

  • Cell Biology
  • Biophysics
  • Cancer Research

Background:

  • Intracellular apical-basal polarity, regulated by polarity proteins, is vital for cell migration and metastasis.
  • Understanding stress distribution within cells is key to deciphering migration mechanisms.

Purpose of the Study:

  • To investigate the existence and role of intrinsic apical-basal stress polarity in tumor cells.
  • To determine the relationship between apical-basal stress polarity and flow-induced front-back stress polarity.
  • To explore the therapeutic potential of disrupting apical-basal stress polarity in tumor metastasis.

Main Methods:

  • Utilized a genetically encoded Förster resonance energy transfer (FRET) biosensor to visualize spatiotemporal stress.
  • Measured stress between lipid rafts and the actin cytoskeleton.
  • Assessed cell migration activity before and after disrupting apical-basal stress polarity.

Main Results:

  • Provided evidence for intrinsic apical-basal stress polarity in tumor cells.
  • Demonstrated that apical-basal stress polarity is a prerequisite for flow-induced front-back stress polarity.
  • Disruption of apical-basal stress discrepancy led to a significant reduction in cell migration (from 76.2 ± 3.5% to 10 ± 4.9%).

Conclusions:

  • Intrinsic apical-basal stress polarity is a significant factor influencing cell migration.
  • Disrupting apical-basal stress polarity attenuates cell migration, offering a potential therapeutic strategy against tumor metastasis.