ArticleScientific reports2023
FilGAP regulates tumor growth in Glioma through the regulation of mTORC1 and mTORC2.
Article in Scientific reports, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed, 7 citations in OpenAlex.
- Amino-acids-mTORC1-driven DDA1 phosphorylation promotes DNA repair and glioblastoma progression.Cell communication and signaling : CCS · 2026Article
- Redundancy in Growth Factor Receptor Signaling in Adult Astrocytoma Resistance to Small-Molecule Tyrosine Kinase Inhibitors.International journal of molecular sciences · 2026Review
- ORMDL2 Promotes the Growth of Glioma through mTORC1-Mediated Fatty Acid Metabolism.Applied biochemistry and biotechnology · 2025Article
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6 authors at 1 institution in 1 country.
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Abstract
The mechanistic target of rapamycin (mTOR) is a serine/threonine protein kinase that forms the two different protein complexes, known as mTORC1 and mTORC2. mTOR signaling is activated in a variety of tumors, including glioma that is one of the malignant brain tumors. FilGAP (ARHGAP24) is a negative regulator of Rac, a member of Rho family small GTPases. In this study, we found that FilGAP interacts with mTORC1/2 and is involved in tumor formation in glioma. FilGAP interacted with mTORC1 via Raptor and with mTORC2 via Rictor and Sin1. Depletion of FilGAP in KINGS-1 glioma cells decreased phosphorylation of S6K and AKT. Furthermore, overexpression of FilGAP increased phosphorylation of S6K and AKT, suggesting that FilGAP activates mTORC1/2. U-87MG, glioblastoma cells, showed higher mTOR activity than KINGS-1, and phosphorylation of S6K and AKT was not affected by suppression of FilGAP expression. However, in the presence of PI3K inhibitors, phosphorylation of S6K and AKT was also decreased in U-87MG by depletion of FilGAP, suggesting that FilGAP may also regulate mTORC2 in U-87MG. Finally, we showed that depletion of FilGAP in KINGS-1 and U-87MG cells significantly reduced spheroid growth. These results suggest that FilGAP may contribute to tumor growth in glioma by regulating mTORC1/2 activities.
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