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Updated: Oct 25, 2025

Co-culture of Glioblastoma Stem-like Cells on Patterned Neurons to Study Migration and Cellular Interactions
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Neuronal-driven glioma growth requires Gαi1 and Gαi3

Yin Wang1, Yuan-Yuan Liu2, Min-Bin Chen3

  • 1Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, China.

Theranostics
|August 10, 2021
PubMed

Insights

Neuroligin-3 (NLGN3) drives glioma growth by recruiting Gαi1/3 proteins. Inhibiting Gαi1/3 reduces glioma and lung cancer brain metastasis, highlighting Gαi1/3 as a therapeutic target.

Area of Science:

  • Neuro-oncology
  • Molecular biology
  • Cancer signaling pathways

Background:

  • Neuroligin-3 (NLGN3) is implicated in promoting glioma cell growth.
  • G protein alpha subunit i1/3 (Gαi1/3) recruitment to receptor tyrosine kinases (RTKs) is crucial for oncogenic signaling.

Purpose of the Study:

  • To investigate the role of Gαi1/3 in NLGN3-mediated glioma cell growth and signaling.
  • To determine if Gαi1/3 is a potential therapeutic target for glioma and brain metastasis.

Main Methods:

  • Genetic strategies including shRNA-mediated depletion and ectopic overexpression of Gαi1/3.
  • Analysis of Akt-mTORC1 and Erk signaling pathway activation.
  • Assessment of glioma cell growth, proliferation, and migration in vitro.
  • Evaluation of tumor growth in orthotopic xenograft models (glioma and brain-metastatic lung cancer) in mice.

Main Results:

  • NLGN3-induced Akt-mTORC1 and Erk activation were dependent on Gαi1/3 expression levels.
  • Gαi1/3 depletion attenuated NLGN3-driven glioma cell growth, proliferation, and migration.
  • Gαi1/3 silencing inhibited orthotopic glioma and brain metastasis growth, while overexpression enhanced it.
  • Gαi3 upregulation in human glioma correlated with poor prognosis.

Conclusions:

  • Gαi1/3 is essential for NLGN3-induced oncogenic signaling and glioma cell growth.
  • Targeting Gαi1/3 presents a promising therapeutic strategy for glioma and brain metastasis.
Keywords:
Gαi1/3NLGN3Neuron-glioma communicationSignaling

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