Tau alteration and neuronal degeneration in tauopathies: mechanisms and models

Autor(en): Brandt, R
Hundelt, M
Shahani, N
Stichwörter: Alzheimer's disease; ALZHEIMERS-DISEASE; Biochemistry & Molecular Biology; Biophysics; Cell Biology; cytoskeleton; FAMILIAL FRONTOTEMPORAL DEMENTIA; GLYCOGEN-SYNTHASE KINASE-3-BETA; HUMAN BRAIN-TAU; MICROTUBULE-ASSOCIATED PROTEIN; MOLECULAR-WEIGHT TAU; neurodegeneration; neurofibrillary tangle; paired helical filament; PAIRED HELICAL FILAMENTS; PERIPHERAL NERVOUS-SYSTEM; R406W HUMAN TAU; tau; tauopathy; V337M HUMAN TAU
Erscheinungsdatum: 2005
Volumen: 1739
Ausgabe: 2-3
Startseite: 331
Seitenende: 354
Tau becomes characteristically altered both functionally and structurally in several neurodegenerative diseases now collectively called tauopathies. Although increasing evidence supports that alterations of tau may directly cause neuronal degeneration and cell death, the mechanisms, which render tau to become a toxic agent are still unclear. In addition, it is obscure, whether neurodegeneration in tauopathies occurs via a common mechanism or specific differences exist. The aim of this review is to provide an overview about the different experimental models that currently exist, how they are used to determine the role of tau during degeneration and what has been learnt from them concerning the mechanistic role of tau in the disease process. The review begins with a discussion about similarities and differences in tau alteration in paradigmatic tauopathies such as frontotemporal dementia and parkinsonism linked to chromosome 17 (FTDP-17) and Alzheimer's disease (AD). The second part concentrates on major experimental models that have been used to address the mechanistic role of tau during degeneration. This will include a discussion of cell-free assays, culture models using cell lines or dissociated neurons, and animal models. How these models aid to understand (i) alterations in the function of tau as a micro tubule-associated protein (MAP), (ii) direct cytotoxicity of altered tau protein, and (iii) the potential role of tau aggregation in neurodegenerative processes will be the central theme of this part. The review ends with concluding remarks about a general mechanistic model of the role of tau alteration and neuronal degeneration in tauopathies and future perspectives. (C) 2004 Elsevier B.V. All rights reserved.
ISSN: 09254439
DOI: 10.1016/j.bbadis.2004.06.018

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