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Neuroligin-3 interaction with CSPG4 regulates normal and malignant glial precursors through PIEZO1

Gillespie, S. M.; Kim, Y. S.; Geraghty, A. C.; Yalcin, B.; Mancusi, R.; Hysinger, J.; Ivec, A. E.; Reed, J.; Drexler, R.; Quezada, M.; Malacon, K.; Woo, P. J.; Yang, A.; Lam, M.; Pan, Y.; Zuchero, J. B.; Trotter, J.; Monje, M.

2025-07-17 neuroscience
10.1101/2025.07.12.664340 bioRxiv
Show abstract

Glioma pathophysiology is robustly regulated by interactions with neurons. Key to these interactions is the role of neuroligin-3 (NLGN3), a synaptic adhesion molecule shed in response to neuronal activity1-5 that functions as a paracrine factor crucial for glioma growth. Here, we elucidate the mechanistic pathway whereby shed NLGN3 interacts with glioma and their normal glial counterpart. NLGN3 interacts with Chondroitin Sulfate Proteoglycan 4 (CSPG4) on both glioma and healthy oligodendrocyte precursor cells (OPCs)6-9, facilitating CSPG4 shedding by ADAM10. NLGN3-CSPG4 interactions and consequent shedding alter membrane tension, thereby activating PIEZO1 mechanosensitive channels and causing membrane depolarization. The NLGN3-CSPG4-PIEZO1 axis maintains OPCs in an undifferentiated, stem-like state and promotes glioma proliferation, underscoring important functional roles for the NLGN3-CSPG4-PIEZO1 axis in both healthy and malignant glial precursors.

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