Neuron Skeleton Gatekeeper Linked to Alzheimer's
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- Penn State researchers identified the membrane-associated periodic skeleton (MPS) as a regulator of endocytosis in neurons, showing it controls when and where cells absorb substances.
- Ruobo Zhou and team used super-resolution imaging to demonstrate that the MPS, once thought to be a passive support structure, actively slows nutrient and protein uptake in neurons.
- Disruption of the MPS led to faster endocytosis, triggering a positive feedback loop that weakened the lattice and increased cellular intake of proteins, including harmful ones.
- Neurons with damaged MPS absorbed amyloid precursor protein (APP) more rapidly, leading to higher levels of toxic amyloid-β42 and increased markers of cell death.
- Jinyu Fei proposed that stabilizing the MPS could slow early cellular changes in Alzheimer’s, offering a potential new therapeutic strategy to prevent neurodegeneration.
Why it matters: The MPS deterioration seen in aging and diseased neurons removes a critical brake on toxic protein uptake, accelerating damage linked to Alzheimer’s. Stabilizing this structure could delay or prevent cell death, shifting treatment focus from clearing plaques to preserving internal cellular architecture — a material change in how scientists approach early intervention.
