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Alzheimer Disease and Associated Disorders
2010-07-01 00:00:00

Could Clinical Profile Influence CSF Biomarkers in Early-onset Alzheimer Disease?

Descrição: In common forms of Alzheimer disease (AD), anterograde memory impairment is the first deficit to occur. However, the disease, especially in its presenile forms, may also manifest itself through initial deficits that are predominantly of a nonmemory type. These distinct clinical profiles, which reflect the distinct topography of the underlying pathologic processes, may also differ in terms of their cerebrospinal fluid (CSF) markers. The aim of this study was to assess the levels of total tau, phosphorylated tau, and amyloid-[beta] 42 peptide in the CSF of "atypical" (nonmemory) early-onset AD patients. CSF biomarkers were evaluated in 22 atypical patients, and compared with those from a group of 13 "typical" patients, with a memory onset form of the disease. Our results show that independently of age, disease duration, education level, and clinical severity indices, patients with an atypical onset have significantly higher levels of total tau in the CSF (P=0.023). These findings indicate that an assessment of CSF biomarkers may be of particular use in the clinical diagnosis of "atypical-onset" forms of early-onset AD in which the initial symptoms involve language and visuospatial abilities rather than memory. In addition, they highlight the heterogeneity of pathologic processes in AD, suggesting more intense degeneration in the forms of the disease that primarily involve neocortical structures. (C) 2010 Lippincott Williams & Wilkins, Inc.

Seção: Original Articles
Volume: 0
Autor: Koric, Lejla; Felician, Olivier; Guedj, Eric; Hubert, Anne Michele; Mancini, Julien; Boucraut, Jose; Ceccaldi, Mathieu


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