Glioma regulates GABAergic signaling to drive hyperactivity and tumor progression.

Loss of the GABA transporter Slc6a1 in autochthonous glioma models enhances glioma progression, promotes network hyperactivity, and alters tonic GABA release by tumors.

• Why it matters: Inhibitory neuron roles in neuron–glioma bidirectional communication are poorly defined, limiting understanding of how hyperexcitability supports malignant progression.
• What they did: Using in vivo screening in autochthonous glioma models, the study tested how glioma affects inhibitory neurons and identified DBI as a secreted negative allosteric modulator of GABA-A linking hyperexcitability to proliferation.
• The result: Glioma-driven inhibitory neuronal signaling modulates tumor growth, and subsequent stimulation suppresses tumor growth, implying inhibitory pathways can be targeted to affect progression.