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Axin localizes to mitotic spindles and centrosomes in mitotic cells

Shi-Mun Kim1, Eun-Jin Choi, Ki-Joon Song

  • 1Laboratory of Cell Biology, Department of Microbiology and Bank for Pathogenic Virus, College of Medicine, Korea University, Seoul 136-705, South Korea.

Experimental Cell Research
|April 1, 2009
PubMed

Insights

Axin, a Wnt signaling regulator, localizes to mitotic spindles and centrosomes. Its overexpression impacts protein distribution and cell division, particularly under Aurora kinase inhibition.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Cancer Research

Background:

  • Wnt signaling is crucial for cell proliferation and cancer.
  • Wnt components are implicated in mitosis and chromosomal instability.
  • The role of Axin in mitosis remains largely unknown.

Purpose of the Study:

  • To investigate the role of Axin in mitosis.
  • To determine Axin's localization during cell division.
  • To explore Axin's interactions with other mitotic regulators.

Main Methods:

  • Monoclonal antibodies against Axin were used for localization studies.
  • siRNA specific for Aurora A kinase and kinase inhibitors were employed.
  • Axin overexpression and its effects on protein distribution were analyzed.

Main Results:

  • Axin localizes to the centrosome and mitotic spindles.
  • Axin's localization is dependent on Aurora A kinase activity.
  • Axin overexpression alters Plk1 and GSK3beta distribution, affecting cytokinesis under specific conditions.

Conclusions:

  • Axin plays a role in mitosis, interacting with key regulators like Aurora A kinase.
  • Axin's expression level influences the distribution of associated proteins.
  • These interactions can impact mitotic progression and cytokinesis, especially when Aurora kinase is inhibited.

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