Immature neurons linked to Alzheimer’s resilience — SkimNews
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- Netherlands Institute for Neuroscience researchers identified immature neurons in human hippocampal tissue from individuals over 80, present across all cognitive states including Alzheimer’s pathology and resilience
- Evgenia Salta notes that while 30% of older adults with Alzheimer’s pathology never develop dementia, the biological basis for this cognitive resilience has remained largely unknown
- Immature neurons in cognitively resilient individuals show transcriptional activation of survival and anti-inflammatory programs, rather than simply replacing lost cells
- Giorgia Tosoni and team developed novel methods to detect rare immature neurons in postmortem brain tissue, minimizing reliance on animal-model assumptions
- Adult neurogenesis remains debated in humans, but the study finds evidence of immature neurons even in aged brains, suggesting ongoing neural plasticity
- Cognitive resilience may stem not from neuron quantity but from how these cells respond to damage—potentially supporting surrounding neural networks like 'fertilizer in a garden'
Why it matters: This shifts Alzheimer’s research from focusing solely on neurodegeneration to understanding natural brain protection mechanisms. If immature neurons help maintain function despite pathology, therapies could aim to boost these cells’ resilience pathways—potentially preserving cognition in aging populations without halting disease progression.
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