Acta Neuropathologica

, Volume 112, Issue 3, pp 253–260

Does striatal pathology distinguish Parkinson disease with dementia and dementia with Lewy bodies?

Authors

    • Institute of Clinical Neurobiology
  • Johannes Attems
    • Department of PathologyOtto Wagner Hospital
Original Paper

DOI: 10.1007/s00401-006-0088-2

Cite this article as:
Jellinger, K.A. & Attems, J. Acta Neuropathol (2006) 112: 253. doi:10.1007/s00401-006-0088-2

Abstract

The morphological differentiation of Parkinson disease with dementia (PDD) and dementia with Lewy bodies (DLB) is a matter of discussion. The objective of this study was to investigate the regional distribution of ß-amyloid (Aß) plaques, α-synuclein (AS), and pathology in both disorders. The basal ganglia from 17 age-matched patients of PDD and DLB each were immunohistochemically examined with variable degrees of associated Alzheimer pathology using antibodies to Aß, AS, and tau. DLB brains showed a significantly higher burden of (diffuse) amyloid plaques in the putamen and caudate nucleus and slightly more severe tau pathology than PDD brains despite similar neuritic Braak stages. Phases of Aß development in DLB brains often, but inconsistently, correlated with both neuritic Braak stages and severity of striatal Aß load, while these correlations were almost never seen in PDD cases with Alzheimer lesions. They also revealed a higher burden of AS-lesions (both Lewy neurites and Lewy bodies) than PDD cases that commonly had a paucity of all three types of lesion. The globus pallidus was virtually spared in both phenotypes. Differences in AS and Aß pathologies and much less of tau lesions in the striatum support a morphologic distinction between PDD and DLB, which may be of pathophysiologic importance, but the causes of these differences are unclear.

Keywords

Parkinson disease with dementia Dementia with Lewy bodies Striatal α-synuclein Aß plaques

Copyright information

© Springer-Verlag 2006