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Activity-dependent synapse modulation and the pathogenesis of Alzheimer disease
1National Institute of Child Health and Human Development, The National Institutes of Health, Bethesda, MD 20892, USA. nelsonp@mail.nih.gov
Current Alzheimer Research
|December 27, 2005
Summary
Neural activity shapes brain development and may be crucial in Alzheimer's disease (AD) pathogenesis. Maintaining synaptic integrity through neural activity could offer therapeutic targets for AD.
Area of Science:
- Neuroscience
- Neurodevelopment
- Alzheimer's Disease Pathogenesis
Background:
- Normal nervous system development involves activity-dependent pruning of neurons and synapses.
- Alzheimer's disease (AD) pathogenesis involves molecular mechanisms with commonalities to neurodevelopmental processes.
Purpose of the Study:
- To hypothesize that aberrant neural activity patterns or their coupling to synaptic maintenance may drive late-onset, sporadic AD.
- To explore the link between neural activity, synaptic integrity, and AD risk.
Main Methods:
- Review of existing literature on neurodevelopment, synaptic plasticity, and Alzheimer's disease.
- Analysis of behavioral data suggesting lifestyle influences on AD risk.
Main Results:
- Significant mechanistic overlap exists between normal neurodevelopmental pruning and AD.
- Behavioral evidence suggests an active lifestyle may reduce AD risk, implying a role for neural activity.
Conclusions:
- Abnormalities in neural activity and its role in synaptic maintenance are hypothesized as key determinants in sporadic AD.
- Mechanisms linking neural activity to synaptic circuit integrity present potential targets for pharmacological intervention in AD.