Cited by 53Metabolism, Diabetes, and CancerPI3K/AKT/mTOR signaling in cancerCancer, Hypoxia, and Metabolism

Metformin induces degradation of cyclin D1 via AMPK/GSK3β axis in ovarian cancer

Gwak, HyeRan, Kim, Youngmin, An, Haein, Dhanasekaran, Danny N., Song, Yong Sang·2017·Molecular Carcinogenesis

Abstract

Metformin, which is widely used as an anti-diabetic drug, reduces cancer related morbidity and mortality. However, the role of metformin in cancer is not fully understood. Here, we first describe that the anti-cancer effect of metformin is mediated by cyclin D1 deregulation via AMPK/GSK3β axis in ovarian cancer cells. Metformin promoted cytotoxic effects only in the cancer cells irrespective of the p53 status and not in the normal primary-cultured cells. Metformin induced the G1 cell cycle arrest, in parallel with a decrease in the protein expressions of cyclin D1 without affecting its transcriptional levels. Using a proteasomal inhibitor, we could address that metformin-induced decrease in cyclin D1 through the ubiquitin/proteasome process. Cyclin D1 degradation by metformin requires the activation of GSK3β, as determined based on the treatment with GSK3β inhibitors. The activation of GSK3β correlated with the inhibitory phosphorylation by Akt as well as p70S6K through AMPK activation in response to metformin. These findings suggested that the anticancer effects of metformin was induced due to cyclin D1 degradation via AMPK/GSK3β signaling axis that involved the ubiquitin/proteasome pathway specifically in ovarian cancer cells. © 2016 Wiley Periodicals, Inc.

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Crossref · 10.1002/mc.22498

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Authors
Gwak, H., Kim, Y., An, H., Dhanasekaran, D. N., & Song, Y. S.
Affiliations
  • Seoul National University (KR)
  • OU Health Stephenson Cancer Center (US)
Corresponding author
Song, Yong Sang
Venue
Molecular Carcinogenesis
Publisher
Wiley
Published
2016-04-29
Volume
56
Issue
2
Pages
349-358
ISSN
  • 0899-1987 (ISSN-L)
  • 1098-2744
OpenAlex
W2359972779
Cited by
53
References
44
Citations by year
2026: 1 · 2025: 1 · 2024: 2 · 2023: 6 · 2022: 6 · 2021: 6 · 2020: 5 · 2019: 7 · 2018: 10 · 2017: 8 · 2016: 1
FWCI
4.50
Type
journal article
Language
en
Open access
closed
Locations
  • Molecular Carcinogenesis (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (CA116984)
  • National Research Foundation of Korea
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
Keywords
metformin, cyclin D1, ovarian cancer, AMPK, GSK3β, ubiquitin-proteasome system, protein degradation, G1 cell cycle arrest, Akt phosphorylation, p70S6K, anticancer drug repurposing
MeSH terms
Glycogen Synthase Kinase 3 beta, Antineoplastic Agents, Female, Humans, Hypoglycemic Agents, Metformin, Ovarian Neoplasms, Ovary, Signal Transduction, Cyclin D1, Cell Line, Tumor, Cell Proliferation, AMP-Activated Protein Kinases, Cell Cycle Checkpoints, Proteolysis

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