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Strategies for Tracking Anastasis, A Cell Survival Phenomenon that Reverses Apoptosis
12:55

Strategies for Tracking Anastasis, A Cell Survival Phenomenon that Reverses Apoptosis

Published on: February 16, 2015

Nuclear survivin has reduced stability and is not cytoprotective

Claire M Connell1, Rita Colnaghi1, Sally P Wheatley1

  • 1Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton BN1 9RQ, United Kingdom.

The Journal of Biological Chemistry
|December 7, 2007
PubMed

Insights

Targeting the survivin protein to the nucleus accelerates its degradation, reducing cancer cell resistance to radiation and chemotherapy. This nuclear targeting may offer a novel cancer treatment strategy, especially when combined with radiotherapy.

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Cell Biology

Background:

  • Survivin is a key mitotic protein frequently overexpressed in various cancers.
  • Elevated survivin levels correlate with enhanced resistance to radiation and chemotherapy.
  • Survivin's overexpression contributes to radioresistance and inhibits apoptosis.

Purpose of the Study:

  • To investigate the effect of nuclear localization on survivin stability and function.
  • To determine if targeting survivin to the nucleus can overcome cancer cell resistance.
  • To explore the potential of nuclear survivin targeting as a cancer therapy strategy.

Main Methods:

  • Demonstrated nuclear import of survivin.
  • Assessed survivin degradation in a cdh1-dependent manner.
  • Evaluated the impact on radioresistance and apoptosis inhibition.
  • Analyzed survivin's mitotic localization.

Main Results:

  • Nuclear import of survivin accelerates its degradation via a cdh1-dependent pathway.
  • Targeting survivin to the nucleus abolished the radioresistance conferred by its overexpression.
  • Nuclear survivin targeting prevented apoptosis inhibition without altering its mitotic localization.

Conclusions:

  • Directing survivin to the nucleus enhances its cellular elimination.
  • This strategy effectively overcomes survivin-mediated radioresistance and apoptosis resistance.
  • Nuclear survivin targeting represents a promising novel approach for cancer treatment, particularly in conjunction with radiotherapy.

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