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Updated: May 12, 2026

Monitoring eIF4F Assembly by Measuring eIF4E-eIF4G Interaction in Live Cells
08:47

Monitoring eIF4F Assembly by Measuring eIF4E-eIF4G Interaction in Live Cells

Published on: May 1, 2020

Glycogen synthase kinase-3β positively regulates protein synthesis and cell proliferation through the regulation of

S Shin1, L Wolgamott1, J Tcherkezian2

  • 1Department of Cancer and Cell Biology, University of Cincinnati College of Medicine, Cincinnati, OH, USA.

Oncogene
|April 16, 2013
PubMed

Insights

Glycogen synthase kinase-3 beta (GSK-3β) promotes cancer cell proliferation by increasing protein synthesis. Inhibiting GSK-3β may offer a new strategy against rapamycin-resistant cancers.

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Biochemistry

Background:

  • Protein synthesis is crucial for cell proliferation and is often deregulated in cancer.
  • Rapamycin, an mTORC1 inhibitor, has limited efficacy in many cancer types due to resistance.
  • Identifying novel targets in rapamycin-resistant cancer is essential for developing new therapies.

Purpose of the Study:

  • To identify novel therapeutic targets in rapamycin-resistant cancers.
  • To investigate the role of glycogen synthase kinase-3 beta (GSK-3β) in regulating protein synthesis and cell proliferation.
  • To explore GSK-3β as a potential target for cancer therapy.

Main Methods:

  • Investigated the role of GSK-3β in regulating protein synthesis and cell proliferation.
  • Examined the phosphorylation and inactivation of eukaryotic translation initiation factor 4E-binding protein 1 (4E-BP1) by GSK-3β.
  • Assessed the impact of GSK-3β activity on eukaryotic translation initiation factor 4E (eIF4E)-dependent protein synthesis.

Main Results:

  • GSK-3β was found to promote cell proliferation by positively regulating protein synthesis.
  • GSK-3β phosphorylates and inactivates 4E-BP1.
  • This inactivation of 4E-BP1 leads to increased eIF4E-dependent protein synthesis.

Conclusions:

  • GSK-3β plays a significant role in promoting cancer cell proliferation via enhanced protein synthesis.
  • Targeting GSK-3β represents a promising new therapeutic strategy for rapamycin-resistant cancers.
  • Understanding the GSK-3β/4E-BP1/eIF4E pathway offers insights into cancer progression and treatment.

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