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SUMO-Binding Entities SUBEs as Tools for the Enrichment, Isolation, Identification, and Characterization of the SUMO Proteome in Liver Cancer
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SUMO-Binding Entities SUBEs as Tools for the Enrichment, Isolation, Identification, and Characterization of the SUMO Proteome in Liver Cancer

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SUMO-specific protease 2-mediated deSUMOylation is required for NDRG2 stabilization in gastric cancer cells

Xiao-Yan Hu1, Zhe Liu2, Kai-Lin Zhang3

  • 1Department of Gastrointestinal Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China.

Cancer Biomarkers : Section a of Disease Markers
|October 25, 2017
PubMed

Insights

Sentrin/SUMO specific protease 2 (SENP2) stabilizes the tumor suppressor N-myc downstream regulated gene 2 (NDRG2) by removing SUMOylation tags. This process is crucial for inhibiting gastric cancer cell proliferation.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • N-myc downstream regulated gene 2 (NDRG2) is a tumor suppressor frequently downregulated in cancers.
  • NDRG2 degradation is promoted by SUMOylation at lysine 333, leading to ubiquitination and proteasomal breakdown.
  • The regulation of NDRG2 deSUMOylation remains poorly understood.

Purpose of the Study:

  • To investigate the role of Sentrin/SUMO specific protease 2 (SENP2) in gastric cancer.
  • To elucidate the molecular mechanism by which SENP2 affects NDRG2 stability and function.

Main Methods:

  • Analysis of SENP2 expression in clinical gastric cancer samples.
  • Co-immunoprecipitation assays to confirm protein-protein interactions.
  • Western blotting to assess NDRG2 SUMOylation, ubiquitination, and degradation levels.
  • Cell proliferation assays to evaluate the functional impact of SENP2.

Main Results:

  • SENP2 is downregulated in gastric cancer tissues and exhibits tumor-suppressive activity.
  • SENP2 directly interacts with NDRG2 and mediates its deSUMOylation.
  • SENP2 overexpression stabilizes NDRG2, while SENP2 depletion leads to NDRG2 SUMOylation and degradation.
  • SENP2 antagonizes NDRG2 ubiquitination and proteasomal degradation, enhancing NDRG2 stability.

Conclusions:

  • SENP2 functions as a tumor suppressor in gastric cancer by stabilizing NDRG2.
  • SENP2-mediated deSUMOylation of NDRG2 is critical for maintaining NDRG2 stability and inhibiting gastric cancer cell proliferation.
Keywords:
NDRG2SENP2SUMOylationgastric cancer

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