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Updated: May 22, 2026

Sequential Extraction of Soluble and Insoluble Alpha-Synuclein from Parkinsonian Brains
Published on: January 5, 2016
Analysis of colonic alpha-synuclein pathology in multiple system atrophy
Hélène Pouclet1, Thibaud Lebouvier, Emmanuel Coron
1Inserm, U913, Nantes F-44093, France; Inserm, CIC-04, Nantes F-44093, France; CHU Nantes, Department of Neurology, F-44093, France.
Alpha-synuclein aggregates in the enteric nervous system (ENS) were investigated in multiple system atrophy (MSA). While less frequent than in Parkinson's disease (PD), these deposits were found in some MSA patients, indicating ENS involvement.
Area of Science:
- Neurology
- Gastroenterology
- Pathology
Background:
- Alpha-synuclein aggregates are detectable in the enteric nervous system (ENS) of Parkinson's disease (PD) patients via colonic biopsies.
- The presence of alpha-synuclein pathology in the ENS of multiple system atrophy (MSA) patients remains unstudied.
Purpose of the Study:
- To investigate the presence and frequency of alpha-synuclein pathology in the ENS of MSA patients.
- To compare alpha-synuclein findings in MSA with those in PD patients.
Main Methods:
- Analysis of colonic biopsies from six MSA and nine PD patients.
- Immunohistochemistry using antibodies against phosphorylated alpha-synuclein and neurofilaments (NF 200 kDa).
- Microdissection of biopsies from the descending colon.
Main Results:
- Alpha-synuclein aggregates were detected in one out of six MSA patients.
- Alpha-synuclein aggregates were detected in five out of nine PD patients.
- Findings suggest alpha-synuclein pathology occurs less frequently in MSA than in PD.
Conclusions:
- Alpha-synuclein deposits can be found in the enteric nervous system of MSA patients.
- The ENS is affected by alpha-synuclein pathology in MSA, though less commonly than in PD.
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