191-Astrocyte Leaflet Domains Integrate Synaptic Signals

Paper Talk · Oct 29, 2025 · 21m

This paper details research on how astrocytes interact with multiple synapses through specialized leaflet domains. Using advanced imaging techniques like Focused Ion Beam/Scanning Electron Microscopy (FIB-SEM) and two-photon calcium imaging, the authors structurally define astrocyte leaflets as thin processes characterized by a high surface-to-volume ratio, the exclusion of mitochondria, and the presence of tiny intraluminal endoplasmic reticulum (i-ER) saccules. Crucially, the study refines the "tripartite synapse" concept by showing that most synapses are embedded in "tripartite synaptic…