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PLoS By Category | Recent PLoS Articles
Immunology - Neurological Disorders - Pathology - Physiology

Diagnosis of Alzheimer's Disease Based on Disease-Specific Autoantibody Profiles in Human Sera
Published: Wednesday, August 03, 2011
Author: Eric Nagele et al.

by Eric Nagele, Min Han, Cassandra DeMarshall, Benjamin Belinka, Robert Nagele

After decades of Alzheimer's disease (AD) research, the development of a definitive diagnostic test for this disease has remained elusive. The discovery of blood-borne biomarkers yielding an accurate and relatively non-invasive test has been a primary goal. Using human protein microarrays to characterize the differential expression of serum autoantibodies in AD and non-demented control (NDC) groups, we identified potential diagnostic biomarkers for AD. The differential significance of each biomarker was evaluated, resulting in the selection of only 10 autoantibody biomarkers that can effectively differentiate AD sera from NDC sera with a sensitivity of 96.0% and specificity of 92.5%. AD sera were also distinguishable from sera obtained from patients with Parkinson's disease and breast cancer with accuracies of 86% and 92%, respectively. Results demonstrate that serum autoantibodies can be used effectively as highly-specific and accurate biomarkers to diagnose AD throughout the course of the disease.
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