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Published in: Acta Neuropathologica 6/2010

01-06-2010 | Original Paper

α-Synucleinopathy in the human olfactory system in Parkinson’s disease: involvement of calcium-binding protein- and substance P-positive cells

Authors: Isabel Ubeda-Bañon, Daniel Saiz-Sanchez, Carlos de la Rosa-Prieto, Lucia Argandoña-Palacios, Susana Garcia-Muñozguren, Alino Martinez-Marcos

Published in: Acta Neuropathologica | Issue 6/2010

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Abstract

Hyposmia is an early symptom of idiopathic Parkinson’s disease but the pathological bases of such dysfunction are largely unknown. The distribution of α-synuclein, which forms Lewy bodies and Lewy neurites, and the types of neurons (based on their neurotransmitters) affected by α-synucleinopathy were investigated in the olfactory system in Parkinson’s disease. Immunohistochemical distribution of α-synuclein and its co-localization with tyrosine hydroxylase, somatostatin, calbindin, calretinin, parvalbumin and substance P in the olfactory bulb, anterior olfactory nucleus, olfactory tubercle and piriform, periamygdaloid and rostral entorhinal cortices of idiopathic Parkinson’s disease cases (n = 11) and age-matched controls (n = 11) were investigated. Lewy bodies and Lewy neurites were present in the olfactory bulb, particularly in mitral cells and in the inner plexiform layer. α-synuclein was particularly abundant in the different divisions of the anterior olfactory nucleus (bulbar, intrapeduncular, retrobulbar and cortical). In contrast, Lewy bodies and Lewy neurites were less abundant in the olfactory tubercle and olfactory cortices. In the olfactory bulb, anterior olfactory nucleus and olfactory cortices, cells affected by α-synucleinopathy rarely co-localized tyrosine hydroxylase or somatostatin, but they frequently co-localized calbindin, calretinin, parvalbumin and substance P. The present data provide evidence that α-synucleinopathy affects neurons along the olfactory pathway. Dopamine- and somatostatin-positive cells are rarely affected; whereas the cell types most vulnerable to neurodegeneration include glutamate- (mitral cells), calcium-binding protein- and substance P-positive cells. These results provide data on the distribution and cell types involved by α-synucleinopathy in the human olfactory system during Parkinson disease that may be useful for future clinical investigation.
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Metadata
Title
α-Synucleinopathy in the human olfactory system in Parkinson’s disease: involvement of calcium-binding protein- and substance P-positive cells
Authors
Isabel Ubeda-Bañon
Daniel Saiz-Sanchez
Carlos de la Rosa-Prieto
Lucia Argandoña-Palacios
Susana Garcia-Muñozguren
Alino Martinez-Marcos
Publication date
01-06-2010
Publisher
Springer-Verlag
Published in
Acta Neuropathologica / Issue 6/2010
Print ISSN: 0001-6322
Electronic ISSN: 1432-0533
DOI
https://doi.org/10.1007/s00401-010-0687-9

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