Disruption of sphingolipid metabolism promotes tau seeding through endolysosomal membrane rigidification and rupture.

Disruption of sphingolipid metabolism increases endolysosomal rupture by 50%, promoting tau seeding and neurotoxicity in models of Alzheimer's disease.

• Why it matters: Understanding how endolysosomal dysfunction contributes to tau pathology is crucial for developing targeted therapies for tauopathies like Alzheimer's disease, where such dysfunction is common but mechanisms are unclear.
• What they did: The study silenced sphingolipid metabolism genes and used fluorescence recovery and dye imaging to show reduced membrane fluidity and increased rupture, leading to tau aggregation in Caenorhabditis elegans and human cells.
• The result: Restoring membrane fluidity with unsaturated fatty acids decreased rupture and tau seeding, reducing neurotoxicity, and highlighting membrane fluidity as a potential therapeutic target.