Journal of Movement Disorders

Brief communications

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; DOI: https://doi.org/10.14802/jmd.22042

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Abstract PDF Supplementary Material: Objective
This study aimed to evaluate whether a larger tissue volume increases the sensitivity of detecting alpha-synuclein (AS) pathology in the gastrointestinal (GI) tract.
Methods
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.
Results
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.
Conclusion
Examining a large tissue volume increased the sensitivity of detecting AS accumulation in the GI tract.

Changes in Cerebral Gray and White Matter in Patients with Pantothenate Kinase-Associated Neurodegeneration: A Long-Term Magnetic Resonance Imaging Follow-Up Study: Pedro Roa-Sanchez, Pamela Bido, Jairo Oviedo, Hans-Jürgen Huppertz, Herwin Speckter, Peter Stoeter; J Mov Disord. 2021;14(2):148-152. Published online May 26, 2021; DOI: https://doi.org/10.14802/jmd.20102

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Objective
To determine the volume changes in gray and white matter during a long-term follow-up in patients suffering from pantothenate kinase-associated neurodegeneration (PKAN).
Methods
Magnetic resonance imaging was repeated in 13 patients and 14 age-matched controls after a mean interval of more than 7 years. T1-weighted sequences were evaluated by fully automated atlas-based volumetry, compared between groups and correlated with disease progression.
Results
The patients did not show generalized cerebral atrophy but did show a significantly faster volume reduction in the globus pallidus during follow-up (between -0.96% and -1.02% per year, p < 0.05 adjusted for false discovery rate) than controls, which was significantly related to the progression in their dystonia scores (p = 0.032).
Conclusion
The volume loss in the globus pallidus over time—together with the accumulation of iron known as the “tiger’s eye”—supports the pathophysiologic concept of this nucleus as a center of inhibition and its severe malfunction in PKAN.

Citations

Citations to this article as recorded by

Cerebral and cerebellar white matter tract alterations in patients with Pantothenate Kinase-Associated Neurodegeneration (PKAN)
Diones Rivera, Pedro Roa-Sanchez, Pamela Bidó, Herwin Speckter, Jairo Oviedo, Peter Stoeter
Parkinsonism & Related Disorders.2022; 98: 1. CrossRef
Long-Term Neuroradiological and Clinical Evaluation of NBIA Patients Treated with a Deferiprone Based Iron-Chelation Therapy
Nicola Romano, Giammarco Baiardi, Valeria Maria Pinto, Sabrina Quintino, Barbara Gianesin, Riccardo Sasso, Andrea Diociasi, Francesca Mattioli, Roberta Marchese, Giovanni Abbruzzese, Antonio Castaldi, Gian Luca Forni
Journal of Clinical Medicine.2022; 11(15): 4524. CrossRef

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