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Mitotic spindle misorientation in cancer--out of alignment and into the fire

Jillian C Pease1, Jennifer S Tirnauer

  • 1Center for Molecular Medicine, University of Connecticut Health Center, Farmington, CT 06030-3101, USA.

Journal of Cell Science
|March 16, 2011
PubMed

Insights

Tumor suppressor proteins like APC, E-cadherin, and VHL are crucial for correct mitotic spindle orientation. Their loss can lead to spindle misorientation, potentially contributing to cancer development and progression.

Area of Science:

  • Cell biology
  • Cancer research
  • Developmental biology

Background:

  • Mitotic spindle orientation is critical for tissue organization and cell placement.
  • Spindle misorientation is increasingly linked to cancer development.
  • Key tumor suppressors (APC, E-cadherin, VHL) play roles in spindle orientation.

Purpose of the Study:

  • To review the role of major human tumor suppressors in mitotic spindle orientation.
  • To explore how loss of function of these proteins leads to spindle misorientation.
  • To discuss the interplay between spindle misorientation and other cancer-associated features.

Main Methods:

  • Review of existing literature on tumor suppressors and spindle orientation.
  • Analysis of molecular mechanisms affecting microtubule stability and cell polarity.
  • Consideration of oncogene mutations, centrosome amplification, and tumor microenvironment factors.

Main Results:

  • Adenomatous polyposis coli (APC), E-cadherin, and von Hippel-Lindau (VHL) proteins influence microtubule stability and cell polarity.
  • Loss of function in these tumor suppressors results in aberrant spindle orientation.
  • Spindle misorientation can be influenced by various cancer-associated factors.

Conclusions:

  • Spindle misorientation alone is unlikely to cause cancer but can synergize with other cancer-promoting changes.
  • Spindle misorientation may facilitate genomic instability, tissue disorganization, and metastasis.
  • Understanding spindle orientation is vital for cancer research and therapeutic strategies.

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