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Sensitivity of Detecting Alpha-Synuclein Accumulation in the Gastrointestinal Tract and Tissue Volume Examined
Chaewon Shin, Seong-Ik Kim, Sung-Hye Park, Jung Hwan Shin, Chan Young Lee, Han-Kwang Yang, Hyuk-Joon Lee, Seong-Ho Kong, Yun-Suhk Suh, Han-Joon Kim, Beomseok Jeon
J Mov Disord. 2022;15(3):264-268.   Published online July 26, 2022
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AbstractAbstract PDFSupplementary Material
This study aimed to evaluate whether a larger tissue volume increases the sensitivity of detecting alpha-synuclein (AS) pathology in the gastrointestinal (GI) tract.
Nine patients with Parkinson’s disease (PD) or idiopathic rapid eye movement sleep disorder (iRBD) who underwent GI operation and had full-depth intestinal blocks were included. All patients were selected from our previous study population. A total of 10 slides (5 serial sections from the proximal and distal blocks) per patient were analyzed.
In previous studies, pathologic evaluation revealed phosphorylated AS (+) in 5/9 patients (55.6%) and in 1/5 controls (20.0%); in this extensive examination, this increased to 8/9 patients (88.9%) but remained the same in controls (20.0%). The severity and distribution of positive findings were similar between patients with iRBD and PD.
Examining a large tissue volume increased the sensitivity of detecting AS accumulation in the GI tract.
Review Article
Mechanism of Anti-α-Synuclein Immunotherapy
Jun Sung Lee, Seung-Jae Lee
J Mov Disord. 2016;9(1):14-19.   Published online January 25, 2016
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  • 34 Citations
AbstractAbstract PDF
Immunization therapy targeting α-synuclein has emerged as a promising approach for Parkinson’s disease and perhaps for other synucleinopathies. Several antibodies have shown therapeutic effects in mouse models of synucleinopathies and have alleviated the pathological and behavioral phenotypes of these mice. The mechanisms through which the immunization therapy works were initially puzzling, especially given that α-synuclein is a typical cytosolic protein. Recent studies, however, suggested that extracellular α-synuclein is an important pathogenic entity, and hence, a target for immunotherapy. Here, we review the literature describing immunization therapy for synucleinopathies in mouse models and provide current thoughts on the potential mechanisms underlying the therapeutic effects of α-synuclein immunotherapy.


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JMD : Journal of Movement Disorders