Could Alzheimer’s Begin in the Nerves, Not the Brain?
Neuroscience News • • health
Key Points:
- New research from the University of Central Florida reveals that movement and balance issues in Alzheimer’s disease may stem from peripheral nervous system failures, not just brain degeneration, challenging traditional views of the disease’s progression.
- Using "human-on-a-chip" technology, researchers demonstrated that genetic mutations linked to familial Alzheimer’s directly impair the neuromuscular junction (NMJ), disrupting nerve-to-muscle communication independently of the brain or spinal cord.
- This discovery suggests that medications targeting brain plaques and tangles might not effectively address motor symptoms if those symptoms originate in peripheral nerves, highlighting the need for new therapeutic approaches.
- The study utilized lab-grown human stem cells to create a neuromuscular junction-on-a-chip model, allowing precise examination of how familial Alzheimer’s mutations affect muscle control without central nervous system involvement.
- Findings indicate that early motor deficits could serve as an important biomarker for Alzheimer’s, potentially enabling earlier diagnosis and intervention to delay cognitive decline.
