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QBI neuroscientists make Alzheimer's disease advance
Date:6/10/2008

Queensland Brain Institute (QBI) neuroscientists at UQ have discovered a new way to reduce neuronal loss in the brain of a person with Alzheimer's disease.

Memory loss in people with Alzheimer's disease can be attributed to several factors.

These include a build-up of the neuro-toxin Amyloid beta the major component of amyloid plaques found in patients with Alzheimer's and corresponding degeneration of a specific population of nerve cells in the basal forebrain.

QBI neuroscientist Dr Elizabeth Coulson's research was recently published in the Journal of Neuroscience.

She said the research had established that the molecule known as p75 neurotrophin receptor was necessary for the Amyloid beta to cause nerve cell degeneration in the basal forebrain.

During her research, Dr Coulson's team found both in cultured cells and in an animal model of Alzheimer's disease that it was possible to completely prevent Amyloid beta toxicity by removing the p75 cell death receptor.

"Discovering how Amyloid beta triggers neuronal degeneration has been a question bugging neuroscientists for decades, and we have identified an important piece of the puzzle," Dr Coulson said.

These results provide a novel mechanism to explain the early and characteristic loss of brain cells that occurs in Alzheimer's disease which are known to be important for memory formation.

Dr Coulson already has patented molecules that can block p75 and is ready to begin testing them in animal models of Alzheimer's disease.

"If such therapy is successful, it probably wouldn't cure this multifaceted disease," Dr Coulson said.

"But it would be a significant improvement on what is currently available for Alzheimer's disease patients."

The World Health Organisation predicts that by 2040, neurodegenerative conditions will become the world's leading cause of death, overtaking cancer.

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Contact: Dr. Elizabeth Coulson
communications@uq.edu.au
61-733-466-392
Research Australia
Source:Eurekalert

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