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Alzheimer's progression tracked prior to dementia
Date:9/23/2013

For years, scientists have attempted to understand how Alzheimer's disease harms the brain before memory loss and dementia are clinically detectable. Most researchers think this preclinical stage, which can last a decade or more before symptoms appear, is the critical phase when the disease might be controlled or stopped, possibly preventing the failure of memory and thinking abilities in the first place.

Important progress in this effort is reported in October in Lancet Neurology. Scientists at the Charles F. and Joanne Knight Alzheimer Disease Research Center at Washington University School of Medicine in St. Louis, working in collaboration with investigators at the University of Maastricht in the Netherlands, helped to validate a proposed new system for identifying and classifying individuals with preclinical Alzheimer's disease.

Their findings indicate that preclinical Alzheimer's disease can be detected during a person's life, is common in cognitively normal elderly people and is associated with future mental decline and mortality. According to the scientists, this suggests that preclinical Alzheimer's disease could be an important target for therapeutic intervention.

A panel of Alzheimer's experts, convened by the National Institute on Aging in association with the Alzheimer's Association, proposed the classification system two years ago. It is based on earlier efforts to define and track biomarker changes during preclinical disease.

According to the Washington University researchers, the new findings offer reason for encouragement, showing, for example, that the system can help predict which cognitively normal individuals will develop symptoms of Alzheimer's and how rapidly their brain function will decline. But they also highlight additional questions that must be answered before the classification system can be adapted for use in clinical care.

"For new treatments, knowing where individuals are on th
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Contact: Michael C. Purdy
purdym@wustl.edu
314-286-0122
Washington University School of Medicine
Source:Eurekalert

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