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Brain-to-stomach transfer of α-synuclein via vagal preganglionic projections
Acta neuropathologica, 2017-03, Vol.133 (3), p.381-393
[Peer Reviewed Journal]
Springer-Verlag Berlin Heidelberg 2016 ;ISSN: 0001-6322 ;EISSN: 1432-0533 ;DOI: 10.1007/s00401-016-1661-y ;PMID: 28012041
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Title:
Brain-to-stomach transfer of α-synuclein via vagal preganglionic projections
Author:
Ulusoy, Ayse
;
Phillips, Robert J.
;
Helwig, Michael
;
Klinkenberg, Michael
;
Powley, Terry L.
;
Di Monte, Donato A.
Subjects:
alpha-Synuclein - genetics
;
alpha-Synuclein - metabolism
;
Animals
;
Autonomic Fibers, Preganglionic - metabolism
;
Brain - cytology
;
Brain - metabolism
;
Choline O-Acetyltransferase - metabolism
;
Female
;
Gastric Mucosa - metabolism
;
Green Fluorescent Proteins - genetics
;
Green Fluorescent Proteins - metabolism
;
Humans
;
Medicine
;
Medicine & Public Health
;
Neurons - metabolism
;
Neurosciences
;
Nodose Ganglion - metabolism
;
Original Paper
;
Pathology
;
Rats
;
Rats, Sprague-Dawley
;
RNA, Messenger - metabolism
;
Time Factors
;
Transduction, Genetic
;
Vagus Nerve - metabolism
;
Vagus Nerve - physiology
Is Part Of:
Acta neuropathologica, 2017-03, Vol.133 (3), p.381-393
Description:
Detection of α-synuclein lesions in peripheral tissues is a feature of human synucleinopathies of likely pathogenetic relevance and bearing important clinical implications. Experiments were carried out to elucidate the relationship between α-synuclein accumulation in the brain and in peripheral organs, and to identify potential pathways involved in long-distance protein transfer. Results of this in vivo study revealed a route-specific transmission of α-synuclein from the rat brain to the stomach. Following targeted midbrain overexpression of human α-synuclein, the exogenous protein was capable of reaching the gastric wall where it was accumulated into preganglionic vagal terminals. This brain-to-stomach connection likely involved intra- and inter-neuronal transfer of non-fibrillar α-synuclein that first reached the medulla oblongata, then gained access into cholinergic neurons of the dorsal motor nucleus of the vagus nerve and finally traveled via efferent fibers of these neurons contained within the vagus nerve. Data also showed a particular propensity of vagal motor neurons and efferents to accrue α-synuclein and deliver it to peripheral tissues; indeed, following its midbrain overexpression, human α-synuclein was detected within gastric nerve endings of visceromotor but not viscerosensory vagal projections. Thus, the dorsal motor nucleus of the vagus nerve represents a key relay center for central-to-peripheral α-synuclein transmission, and efferent vagal fibers may act as unique conduits for protein transfer. The presence of α-synuclein in peripheral tissues could reflect, at least in some synucleinopathy patients, an ongoing pathological process that originates within the brain and, from there, reaches distant organs innervated by motor vagal projections.
Publisher:
Berlin/Heidelberg: Springer Berlin Heidelberg
Language:
English
Identifier:
ISSN: 0001-6322
EISSN: 1432-0533
DOI: 10.1007/s00401-016-1661-y
PMID: 28012041
Source:
ProQuest One Psychology
MEDLINE
ProQuest Central
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