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Published in: Acta Neuropathologica 5/2009

01-11-2009 | Review

The morbid anatomy of dementia in Parkinson’s disease

Authors: Michail E. Kalaitzakis, Ronald K. B. Pearce

Published in: Acta Neuropathologica | Issue 5/2009

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Abstract

Dementia in Parkinson’s disease (PD/PDD) is a common complication with a prevalence of up to 50%, but the specific changes underlying the cognitive decline remain undefined. Neuronal degeneration resulting in the dysfunction of multiple subcortical neurochemical projection systems has been described along with Lewy body-type pathology in cortical and limbic regions. Advanced alpha-synuclein (αSyn) pathology is not necessarily sufficient for producing dementia and concomitant Alzheimer’s disease (AD) change has also been proposed as a possible substrate of PDD. A lack of consensus in the extant literature likely stems from clinical heterogeneity and variable reliability in clinical characterisation as well as other historical and methodological issues. The concurrent presence of abnormally deposited αSyn, amyloid-β and tau proteins in the PDD brain and the interaction of these molecules in a linked pathological cascade of AD and PD-related mechanisms may prove important in determining the underlying pathological process for the development of dementia in PD and this concept of combined pathologies awaits further investigation.
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Metadata
Title
The morbid anatomy of dementia in Parkinson’s disease
Authors
Michail E. Kalaitzakis
Ronald K. B. Pearce
Publication date
01-11-2009
Publisher
Springer-Verlag
Published in
Acta Neuropathologica / Issue 5/2009
Print ISSN: 0001-6322
Electronic ISSN: 1432-0533
DOI
https://doi.org/10.1007/s00401-009-0597-x

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