Protein Posttranslational Modifications in Glioma Stem Cells
Eiichi Hinoi1,2,3
1Department of Bioactive Molecules, Pharmacology, Gifu Pharmaceutical University.
Biological & Pharmaceutical Bulletin
|November 30, 2025
Summary
Two protein modifications in glioma stem cells (GSCs) impact glioblastoma (GBM) malignancy. Understanding SMURF2 and MEK5 pathways offers potential therapeutic targets for cancers driven by cancer stem cells.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Glioblastoma (GBM) is a highly malignant brain tumor.
- Glioma stem cells (GSCs) drive GBM initiation, progression, and recurrence.
- Cancer stem cell properties are linked to tumor malignancy.
Purpose of the Study:
- To review the influence of two protein posttranslational modifications in GSCs.
- To explore the roles of SMURF2 and MEK5 in GSC stemness and GBM malignancy.
- To identify potential therapeutic targets in GSCs.
Main Methods:
- Review of literature on protein posttranslational modifications in GSCs.
- Analysis of ubiquitination of TGF-β receptor (TGFBR) by SMURF2.
- Analysis of ERK5 phosphorylation by MEK5.
Main Results:
- SMURF2Thr249 phosphorylation regulates GSC stemness and tumorigenicity via the TGFBR-SMAD-SOX axis.
- SMURF2Thr249 phosphorylation is downregulated in GBM patients.
- MEK5 controls GSC self-renewal and tumorigenicity by phosphorylating ERK5-STAT3 axis.
Conclusions:
- Protein posttranslational modifications are key mechanisms maintaining GSC stemness and tumorigenicity.
- SMURF2 and MEK5 pathways in GSCs are potential therapeutic targets.
- Targeting GSC-specific modifications may offer novel cancer therapies.
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