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Single Cell Durotaxis Assay for Assessing Mechanical Control of Cellular Movement and Related Signaling Events
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The Golgi microtubules regulate single cell durotaxis.

Yingxue Rong1, Wenzhong Yang1, Huiwen Hao2

  • 1Institute of Systems Biomedicine, School of Basic Medical Science, Peking University Health Science Center, Beijing, China.

EMBO Reports
|February 9, 2021
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Summary

This study reveals Golgi microtubules are key to cell directionality in durotaxis (migration up stiffness gradients). The Golgi-nucleus axis acts as a compass, guiding cell movement via microtubule-focal adhesion interactions.

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Golgidurotaxismechanobiologymicrotubules

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Area of Science:

  • Cell Biology
  • Biophysics
  • Mechanobiology

Background:

  • Cell migration and directionality are crucial in development and disease.
  • Current models focus on actin-based mechanisms, with microtubules understudied in cell directionality.
  • Durotaxis, or cell migration up stiffness gradients, is a key migratory behavior.

Purpose of the Study:

  • To investigate the role of microtubules, specifically Golgi-associated microtubules, in single-cell durotaxis.
  • To elucidate the molecular mechanisms by which cells sense and respond to substrate stiffness gradients.
  • To understand how the Golgi apparatus contributes to directed cell migration.

Main Methods:

  • High-throughput analysis of microtubule plus end and focal adhesion interactions.
  • Fabrication of patterned stiffness substrates using RGD peptide-coated polyacrylamide gels.
  • Live-cell imaging and quantitative analysis of cell migration, Golgi positioning, and cytoskeletal dynamics.

Main Results:

  • Non-centrosomal microtubules originating from the Golgi actively influence leading edge focal adhesion dynamics.
  • The Golgi apparatus reorients in response to external mechanical cues, aligning with stiffness gradients.
  • The Golgi-nucleus axis aligns with the stiffness gradient, indicating its role in sensing directionality.

Conclusions:

  • Golgi microtubules are pivotal in regulating focal adhesion dynamics during durotaxis.
  • The Golgi-nucleus axis acts as a mechanical sensor and compass, directing cell migration up stiffness gradients.
  • This work reveals a novel cytoskeletal mechanism for single-cell durotaxis, highlighting the Golgi's role in mechanosensation and cell directionality.