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Related Experiment Videos

Cytoskeleton cross-talk during cell motility.

J V Small1, I Kaverina, O Krylyshkina

  • 1Department of Cell Biology, Institute of Molecular Biology, Austrian Academy of Sciences, Salzburg. jvsmall@imb.oeaw.ac.at

FEBS Letters
|June 22, 1999
PubMed
Summary
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Significance of microtubule catastrophes at focal adhesion sites.

Cell adhesion & migration·2009

Microtubules influence cell crawling by regulating the turnover of cell-substrate contacts. This action, controlled by Rho family proteins and microtubules, directs cell protrusion and retraction, thereby controlling cell polarity.

Area of Science:

  • Cell biology
  • Cytoskeleton dynamics
  • Cell migration

Background:

  • Cell crawling relies on dynamic actin-based structures for substrate adhesion.
  • Rho family GTPases are key regulators of cell-substrate contact initiation and maturation.
  • The microtubule cytoskeleton's role in contact turnover and cell polarity is less understood.

Purpose of the Study:

  • To investigate the role of the microtubule cytoskeleton in regulating cell-substrate contact turnover.
  • To elucidate how microtubules influence cell polarity during migration.

Main Methods:

  • Observation of cell-substrate interactions.
  • Manipulation of microtubule dynamics.
  • Analysis of actin cytoskeleton organization.
  • Rho family GTPase signaling assays.

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Main Results:

  • Microtubules exert site- and dose-specific relaxing effects on substrate contact assemblies.
  • Microtubule-mediated regulation of contact turnover promotes protrusion at the cell front.
  • Microtubule influence on contact turnover facilitates retraction at the cell rear.

Conclusions:

  • Microtubules actively regulate the turnover of cell-substrate contacts.
  • This regulation by microtubules is crucial for controlling cell protrusion and retraction.
  • Microtubules are essential for establishing and maintaining cell polarity during migration.