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New UC Davis study finds early Alzheimer's identification method
Date:7/9/2010

(SACRAMENTO, Calif.) Abnormal brain images combined with examination of the composition of the fluid that surrounds the spine may offer the earliest signs identifying healthy older adults at risk of developing Alzheimer's disease, well before cognitive problems emerge, a study by researchers at UC Davis has found.

"Our findings indicate that a distinctive pattern of imaging and biomarker deviations from typical adults may be an early warning sign of neurobiological pathology and an early sign of Alzheimer's disease," said Laurel Beckett, a professor of public health sciences at UC Davis and the lead study author. "By the time people get diagnosed with Alzheimer's using cognitive tests, there's already a lot of brain damage. We hope that in the future methods that combine brain imaging and biomarker assessments can push the diagnosis back, while learning more about the mechanisms causing Alzheimer's disease, so we can develop better treatments."

Published in the journal Neurobiology of Aging in June, the study analysis picked out a subgroup of healthy adults who later would experience a decline in memory performance typical of early Alzheimer's disease long before other study participants.

For the study, Beckett and her team used data from the Alzheimer's Disease Neuroimaging Initiative, which provides researchers with access to brain scans, clinical data and other laboratory results from spinal fluid and blood tests from more than 800 older adults. Some study participants began with a clean slate of cognitive health, some with mild cognitive impairment a condition that often presages Alzheimer's and others with mild or moderate Alzheimer's disease.

The researchers analyzed data from 220 normal older adults who had undergone structural magnetic resonance imaging (MRI) and clinical examinations. About half also provided spinal fluid samples. Among the 96 participants, cluster analysis identified three distinct su
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Contact: Phyllis Brown
phyllis.brown@ucdmc.ucdavis.edu
916-734-9023
University of California - Davis - Health System
Source:Eurekalert

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