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Bursts of brain activity may protect against Alzheimer's disease
Date:4/18/2013

ber of pulses was distributed in high-frequency bursts, researchers discovered an increased amyloid-beta 40 production. In addition, the researchers found that only synapses optimized to transfer encoded by bursts contributed towards tipping the balance in favour of amyloid-beta 40. Further investigations conducted by Fogel revealed that the connection between spiking patterns and the type of amyloid-beta produced could revolve around a protein called presenilin. "We hypothesize that changes in the temporal patterns of spikes in the hippocampus may trigger structural changes in the presenilin, leading to early memory impairments in people with sporadic Alzheimer's," explains Dr. Slutsky.

Behind the bursts

According to Dr. Slutsky, different kinds of environmental changes and experiences including sensory and emotional experience can modify the properties of synapses and change the spiking patterns in the brain. Previous research has suggested that a stimulant-rich environment could be a contributing factor in preventing the development of Alzheimer's disease, much as crossword and similar puzzles appear to stimulate the brain and delay the onset of Alzheimer's. In the recent study, the researchers discovered that changes in sensory experiences also regulate synaptic properties leading to an increase in amyloid-beta 40.

In the next stage, Dr. Slutsky and her team are aiming to manipulate activity patterns in the specific hippocampal pathways of Alzheimer's models to test if it can prevent the initiation of cognitive impairment. The ability to monitor dynamics of synaptic activity in humans would be a step forward early diagnosis of sporadic Alzheimer's.


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Contact: George Hunka
ghunka@aftau.org
212-742-9070
American Friends of Tel Aviv University
Source:Eurekalert

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