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Symmetric Bihemispheric Postmortem Brain Cutting to Study Healthy and Pathological Brain Conditions in Humans

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Published on: December 18, 2016

Neuropathological changes in aging brain.

Aikaterini Xekardaki¹, Eniko Kövari, Gabriel Gold

¹Department of Mental Health and Psychiatry, University Hospitals of Geneva, Geneva, Switzerland, Aikaterini.Xekardaki@hcuge.ch.

Advances in Experimental Medicine and Biology

|November 23, 2014

Summary

This summary is machine-generated.

Alzheimer's disease (AD) neurofibrillary tangles (NFTs) in specific brain regions correlate more strongly with cognitive decline than beta-amyloid plaques. Understanding this relationship is crucial for developing better AD diagnostics and treatments.

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Preparation of Acute Hippocampal Slices from Rats and Transgenic Mice for the Study of Synaptic Alterations during Aging and Amyloid Pathology

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Area of Science:

Neuropathology
Neuroscience
Gerontology

Background:

Alzheimer's disease (AD) is characterized by neurofibrillary tangles (NFTs) and beta-amyloid (Aβ) plaques.
The precise correlation between these neuropathological hallmarks and cognitive decline remains incompletely understood.
Both NFTs and Aβ plaques are observed in normal aging, complicating their specific association with AD.

Purpose of the Study:

To review studies assessing the correlation between neuropathological lesions and clinical expression of Alzheimer's disease.
To investigate the differential impact of NFTs and Aβ plaques on cognitive status.
To explore the concept of cognitive reserve in mitigating the effects of AD pathology.

Main Methods:

Review of neuropathological studies conducted over two decades.
Correlation analysis of NFT counts in CA1 and entorhinal cortex with cognitive status.
Analysis of beta-amyloid load in relation to cognitive decline.
Consideration of the cognitive reserve theory.

Main Results:

The number of NFTs in the CA1 and entorhinal cortex appears more closely linked to cognitive status than amyloid plaque load.
The role of amyloid load in Alzheimer's disease progression is still considered controversial.
The theory of cognitive reserve offers a framework for understanding individual differences in compensation for neuropathology.

Conclusions:

Neurofibrillary tangle burden, particularly in specific brain regions, may be a more significant correlate of cognitive decline in Alzheimer's disease than amyloid plaques.
Further research into cognitive reserve is essential for understanding resilience to AD pathology.
There is an urgent need for improved therapeutic and early diagnostic strategies for Alzheimer's disease due to its increasing prevalence and societal cost.