1132-Astrocytic Sodium Homeostasis in Mouse Brain

This research article details the discovery of significant cellular and subcellular sodium heterogeneity within mouse brain astrocytes. Using advanced multi-photon fluorescence lifetime imaging (MP-FLIM), the authors demonstrate that internal sodium levels are not uniform, as previously believed, but vary between the cell body and its processes. The data reveals a bimodal distribution of sodium concentrations, suggesting that astrocytes are organized into functionally distinct subgroups rather than a single homogenous population. These variations appear to be driven by the differential expression of Na+/K+-ATPase subunits and are influenced by gap junction coupling. Ultimately, the study concludes that astrocytes locally adapt their internal chemistry to meet the specific homeostatic demands of surrounding neural networks.References:Meyer J, Bornemann V, Bhattarai A, et al. Cellular and subcellular heterogeneity of astrocytic Na⁺ homeostasis tuning astrocytes into functionally distinct subgroups in the mouse brain[J]. Nature Communications, 2026, 17(1): 4515.前往小宇宙评论区与主播互动