Astrocytes Push or Pull Disease Circuits

Astrocyte reactivity is a hallmark of neurological disease, but reactivity alone doesn’t explain outcome.

Two recent studies take a causal approach, isolating astrocyte-specific GPCR pathways and testing their direct effects on neuronal circuits. One pathway pushes networks toward hyperexcitability through P2Y1R/IGFBP2 signaling. The other pulls circuits back toward homeostasis via GPR37L1/GLT-1-dependent glutamate clearance.

Together, the data argue for a push–pull model of astrocyte control, where disease progression depends not on whether astrocytes are reactive, but which receptor-defined signaling pathway they engage.

Read the full blog: Astrocytes can drive or restrain pathology depending on the receptor they engage.

Astrocytes at the Switch: Driving Excitability or Restoring Balance

Astrocytes are not simply reactive bystanders in disease. New work shows that distinct GPCR pathways can either drive hyperexcitability or restore synaptic balance—revealing a push–pull model of astrocyte control over neural circuits.

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