1405-Atp8a2: Regulator of Neuronal Integrity and Survival

This research identifies the flippase Atp8a2 as a vital regulator of neuronal health and structural stability in mature neurons. While the lipid phosphatidylserine (PS) typically stays inside cell membranes, neurotoxic stress causes it to cluster at dendritic branching points, a process driven by the loss of Atp8a2 expression across various neurodegenerative models. Crucially, the study distinguishes between the protein’s enzymatic activity and its physical presence; while inhibiting its activity causes PS exposure, only the reduction of total Atp8a2 levels triggers architectural collapse and cell death. The findings suggest that Atp8a2 maintains neuronal integrity through interactions with the cytoskeleton, independent of its lipid-shuffling function. Consequently, boosting Atp8a2 expression offers a robust neuroprotective strategy against excitotoxic damage.References:Schneider A, Merkel A B, Perta N, et al. Loss of Atp8a2 drives neurodegeneration through the dysregulation of spatiotemporal phosphatidylserine externalization in mature neurons[J]. Cell Death & Disease, 2026, 17(1): 652.前往小宇宙评论区与主播互动