Neuropathology of Parkinson disease.

Abstract:

INTRODUCTION:Parkinson's disease (PD) is characterized by bradykinesia, rigidity, postural instability and tremor. Several pathologic processes can produce this syndrome, but neurodegeneration accompanied by neuronal inclusions composed of α-synuclein (Lewy bodies) is considered the typical pathologic correlate of PD. METHODS:The neuropathologic features of PD are reviewed based upon personal experience and review of the literature. Molecular pathology of PD is summarized from cell biological and animal studies. RESULTS:The pathologic feature that correlates with signs and symptoms of PD is neuronal loss in the substantia nigra with dopaminergic denervation of the striatum. Neuronal degeneration in the substantia nigra preferentially affects the ventrolateral cell group that projects to posterolateral putamen and is accompanied by formation of Lewy bodies composed of aggregated α-synuclein. Some patients with PD are found at autopsy to have other pathologic processes, such as multiple system atrophy, progressive supranuclear palsy and cerebrovascular disease (vascular Parkinsonism). The peripheral autonomic nervous system is also affected. The triggering event in PD is unknown, but recent studies suggest a role for loss of nuclear membrane integrity. Once α-synuclein aggregates forms, evidence supports cell-to-cell propagation. CONCLUSION:PD is a multisystem synucleinopathy caused by poorly characterized genetic and environmental factors that produces degeneration in selectively vulnerable neuronal populations.

authors

Dickson DW

doi

10.1016/j.parkreldis.2017.07.033

subject

Has Abstract

pub_date

2018-01-01 00:00:00

pages

S30-S33

eissn

1353-8020

issn

1873-5126

pii

S1353-8020(17)30280-8

journal_volume

46 Suppl 1

pub_type

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