Researchers have developed a novel vector-based tracer to map how astrocytes form complex communication networks across the mouse brain. Traditionally, long-range brain connectivity was attributed almost entirely to neurons, but this study reveals that astrocytic gap junctions create distinct, organized pathways that link distant regions. By utilizing TurboID-mediated biotinylation and whole-brain tissue clearing, the authors visualized these networks in three dimensions without damaging the native tissue. Their findings demonstrate that astrocyte networks are region-specific and can span both hemispheres, sometimes following patterns different from known neuronal circuits. Furthermore, the study proves that these glial connections are plastic, as they undergo significant structural reorganization in response to sensory changes like whisker trimming. This work identifies a fundamental, non-neuronal framework for long-range signaling and resource distribution within the central nervous system.

References:

• Cooper M L, Selles M C, Cammer M, et al. Astrocytes connect specific brain regions through plastic networks[J]. Nature, 2026: 1-9.