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Original Articles
Clinical and structural characteristics of NEU1 variants causing sialidosis type 1
Yingji Li, Yang Liu, Rongfei Wang, Ran Ao, Feng Xiang, Xu Zhang, Xiangqing Wang, Shengyuan Yu
Received July 27, 2023  Accepted April 9, 2024  Published online April 11, 2024  
DOI: https://doi.org/10.14802/jmd.23145    [Accepted]
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AbstractAbstract PDF
Purpose
Sialidosis type 2 has variants that are both catalytically inactive (severe), while sialidosis type 1 has at least one catalytically active (mild) variant. This study aimed to discuss the structural changes associated with these variants in a newly reported family carrying NEU1 variants and explore the clinical characteristics of different combinations of variants in sialidosis type 1.
Methods
First, whole-exome sequencing and detailed clinical examination were performed on the family. Second, structural analysis, including energy, flexibility and polar contacts, was conducted for several NEU1 variants, and a sialidase activity assay was performed. Third, previous NEU1 variants were systematically reviewed, and the clinical characteristics of patients in the severe-mild and mild-mild groups with sialidosis type 1 were analyzed.
Results
We report a novel family with sialidosis type 1 and the compound heterozygous variants S182G and V143E. The newly identified V143E variant was predicted to be a mild variant through structural analysis and was confirmed by sialidase activity assay. The cherry-red spot was more prevalent in the severe-mild group, and ataxia was more common in the mild-mild group. Impaired cognition was found only in the severe-mild group. Moreover, patients with cherry-red spots and abnormal EEGs and VEPs had a relatively early age of onset, whereas patients with myoclonus had a late onset.
Conclusion
Changes in flexibility and local polar contacts may be indicators of the NEU1 pathogenicity. Sialidosis type 1 can be divided into two subgroups according to the variant combinations, and patients with these two subtypes have different clinical characteristics.
Phenotypic spectrum of Progressive Supranuclear Palsy: Clinical study and APOE effect
Amina NASRI, Ikram SGHAIER, Anis NEJI, Alya GHARBI, Youssef ABIDA, Saloua MRABET, Amina GARGOURI, Mouna BEN DJEBARA, Imen KACEM, Riadh GOUIDER
Received September 9, 2023  Accepted January 30, 2024  Published online January 30, 2024  
DOI: https://doi.org/10.14802/jmd.23178    [Accepted]
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AbstractAbstract PDF
Objectives
Progressive supranuclear palsy (PSP)is a rare neurodegenerative disorder encompassing several phenotypes with various motor and cognitive deficits.We aimed to study motor and cognitive characteristics across PSP phenotypes,and assess the influence of the Apolipoprotein E (APOE)gene variants on PSP phenotypic expression.
Materials and Methods
In 20-year-cross-sectional study, we retrospectively reviewed the charts of all patients classified as PSP and re-categorized them into phenotypes using the MDS-2017 criteria. Phenotypes were divided into three subgroups based on the clinical presentation during the first 3 years after symptoms’ onset, which defines the early disease stage:Richardson’s syndrome (PSP-RS), PSP-cortical (PSP-F+PSP-SL+PSP-CBS) and PSP-subcortical(PSP-P+PSP-PGF+PSP-PI+PSP-OM+PSP-C+PSP-PLS).Data on clinical and neuropsychological assessments were collected.Genotyping of APOE was performed using the RFLP-PCR and verified by Sanger sequencing.
Results
We included 112 PSP patients comprising 10 phenotypes classified into 48PSP-RS, 34PSP-cortical(17.6%PSP-CBS,9.4%PSP-F,8.2%PSP-SL)and 30 PSP-subcortical(11.6%PSP-P,8%PSP-PI, 2.6%PSP-OM,1.8%PSP-PGF,1.8%PSP-C,0.9%PSP-PLS) subgroups. PSP-RS cases had older age of onset(p=0.009)and more akinetic-rigid and levodopa resistant parkinsonism(p=0.006),while PSP-cortical cases had more tremor and asymmetric and/or levodopa responsive parkinsonism(p=0.025).Cognitive domains were significantly less altered among PSP-subcortical subgroup.Overall,PSP-APOEε4 carriers developed parkinsonism earlier (p=0.019),had earlier oculomotor dysfunction(p=0.052) and more altered cognitive profile.It was also associated with younger age of parkinsonism onset in PSP-RS phenotype(p=0.026).
Conclusion
This study demonstrated the wide phenotypic spectrum of PSP among Tunisians.Later disease onset and akinetic-rigid and levodopa resistant parkinsonism were the hallmarks of PSP-RS phenotype,while milder cognitive impairment was characteristic of PSP-subcortical subgroup.APOEε4 allele was associated to earlier parkinsonism and oculomotor dysfunction and seemed to play a role in defining a more altered cognitive profile in PSP patients.
Prospective Characterization of Cognitive Function in Typical and ‘Brainstem Predominant’Progressive Supranuclear Palsy Phenotypes
Young-Eun C Lee, David R Williams, Jacqueline F I Anderson
J Mov Disord. 2018;11(2):72-77.   Published online May 30, 2018
DOI: https://doi.org/10.14802/jmd.17067
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AbstractAbstract PDF
Objective
Clinicopathological studies over the last decade have broadened the clinical spectrum of progressive supranuclear palsy (PSP) to include several distinct clinical syndromes. We examined the cognitive profiles of patients with PSP-Richardson’s syndrome (PSP-RS) and two atypical ‘brainstem predominant’ PSP phenotypes (PSP-parkinsonism, PSP-P; and PSP-pure akinesia with gait freezing, PSP-PAGF) using a comprehensive neuropsychological battery.
Methods
Fourteen patients diagnosed as PSP-RS, three patients with PSP-P and four patients with PSP-PAGF were assessed using a comprehensive battery of neuropsychological tests.
Results
The typical PSP-RS subgroup demonstrated greater impairments in processing speed [t(19) = -4.10, p = 0.001 (d =1.66)] and executive function [t(19) = -2.63, p = 0.02 (d = 1.20)] compared to the ‘brainstem predominant’ PSP phenotype.
Conclusion
This is the first prospective study to demonstrate that PSP-RS and ‘brainstem predominant’ PSP phenotypes can be differentiated on cognitive grounds. These differences correspond with variations in pathological profiles reported in the literature.

Citations

Citations to this article as recorded by  
  • Pathomechanisms of cognitive impairment in progressive supranuclear palsy
    Kurt A. Jellinger
    Journal of Neural Transmission.2023; 130(4): 481.     CrossRef
  • Differential Diagnosis of Rare Subtypes of Progressive Supranuclear Palsy and PSP-Like Syndromes—Infrequent Manifestations of the Most Common Form of Atypical Parkinsonism
    Patrycja Krzosek, Natalia Madetko, Anna Migda, Bartosz Migda, Dominika Jaguś, Piotr Alster
    Frontiers in Aging Neuroscience.2022;[Epub]     CrossRef
  • Clinical Spectrum of Tauopathies
    Nahid Olfati, Ali Shoeibi, Irene Litvan
    Frontiers in Neurology.2022;[Epub]     CrossRef
  • Neuropsychological assessment could distinguish among different clinical phenotypes of progressive supranuclear palsy: A Machine Learning approach
    Maria Grazia Vaccaro, Alessia Sarica, Andrea Quattrone, Carmelina Chiriaco, Maria Salsone, Maurizio Morelli, Aldo Quattrone
    Journal of Neuropsychology.2021; 15(3): 301.     CrossRef
  • “Parkinson’s disease” on the way to progressive supranuclear palsy: a review on PSP-parkinsonism
    Ján Necpál, Miroslav Borsek, Bibiána Jeleňová
    Neurological Sciences.2021; 42(12): 4927.     CrossRef
  • The Progressive Supranuclear Palsy: Past and Present Aspects
    Theodore P. Parthimos, Kleopatra H. Schulpis
    Clinical Gerontologist.2020; 43(2): 155.     CrossRef
  • Progressive Supranuclear Palsy—Parkinsonism Predominant (PSP-P)—A Clinical Challenge at the Boundaries of PSP and Parkinson's Disease (PD)
    Piotr Alster, Natalia Madetko, Dariusz Koziorowski, Andrzej Friedman
    Frontiers in Neurology.2020;[Epub]     CrossRef
Clinical Heterogeneity of Atypical Pantothenate Kinase-Associated Neurodegeneration in Koreans
Jae-Hyeok Lee, Jongkyu Park, Ho-Sung Ryu, Hyeyoung Park, Young Eun Kim, Jin Yong Hong, Sang Ook Nam, Young-Hee Sung, Seung-Hwan Lee, Jee-Young Lee, Myung Jun Lee, Tae-Hyoung Kim, Chul Hyoung Lyoo, Sun Ju Chung, Seong Beom Koh, Phil Hyu Lee, Jin Whan Cho, Mee Young Park, Yun Joong Kim, Young H. Sohn, Beom Seok Jeon, Myung Sik Lee
J Mov Disord. 2016;9(1):20-27.   Published online January 25, 2016
DOI: https://doi.org/10.14802/jmd.15058
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  • 20 Web of Science
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AbstractAbstract PDFSupplementary Material
Objective
Neurodegeneration with brain iron accumulation (NBIA) represents a group of inherited movement disorders characterized by iron accumulation in the basal ganglia. Recent advances have included the identification of new causative genes and highlighted the wide phenotypic variation between and within the specific NBIA subtypes. This study aimed to investigate the current status of NBIA in Korea.
Methods
We collected genetically confirmed NBIA patients from twelve nationwide referral hospitals and from a review of the literature. We conducted a study to describe the phenotypic and genotypic characteristics of Korean adults with atypical pantothenate kinase-associated neurodegeneration (PKAN).
Results
Four subtypes of NBIA including PKAN (n = 30), PLA2G6-related neurodegeneration (n = 2), beta-propeller protein-associated neurodegeneration (n = 1), and aceruloplasminemia (n = 1) have been identified in the Korean population. The clinical features of fifteen adults with atypical PKAN included early focal limb dystonia, parkinsonism-predominant feature, oromandibular dystonia, and isolated freezing of gait (FOG). Patients with a higher age of onset tended to present with parkinsonism and FOG. The p.R440P and p.D378G mutations are two major mutations that represent approximately 50% of the mutated alleles. Although there were no specific genotype-phenotype correlations, most patients carrying the p.D378G mutation had a late-onset, atypical form of PKAN.
Conclusions
We found considerable phenotypic heterogeneity in Korean adults with atypical PKAN. The age of onset may influence the presentation of extrapyramidal symptoms.

Citations

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  • Typical pantothenate kinase-associated neurodegeneration caused by compound heterozygous mutations in PANK2 gene in a Chinese patient: a case report and literature review
    Yilun Tao, Chen Zhao, Dong Han, Yiju Wei, Lihong Wang, Wenxia Song, Xiaoze Li
    Frontiers in Neurology.2023;[Epub]     CrossRef
  • The first Vietnamese patient who presented late onset of pantothenate kinase-associated neurodegeneration diagnosed by whole exome sequencing: A case report
    Van Khanh Tran, Chi Dung Vu, Hai Anh Tran, Nguyen Thi Kim Lien, Nguyen Van Tung, Nguyen Ngoc Lan, Huy Thinh Tran, Nguyen Huy Hoang
    Medicine.2023; 102(43): e34853.     CrossRef
  • Genetic mutation spectrum of pantothenate kinase-associated neurodegeneration expanded by breakpoint sequencing in pantothenate kinase 2 gene
    Dahae Yang, Sanghyun Cho, Sung Im Cho, Manjin Kim, Moon-Woo Seong, Sung Sup Park
    Orphanet Journal of Rare Diseases.2022;[Epub]     CrossRef
  • Long-Term Outcomes of Deep Brain Stimulation in Pantothenate Kinase-Associated Neurodegeneration-Related Dystonia
    Kyung Ah Woo, Han-Joon Kim, Seung-Ho Jeon, Hye Ran Park, Kye Won Park, Seung Hyun Lee, Sun Ju Chung, Jong-Hee Chae, Sun Ha Paek, Beomseok Jeon
    Journal of Movement Disorders.2022; 15(3): 241.     CrossRef
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    Luz María González Huerta, Sorina Gómez González, Jaime Toral López
    Psychiatric Genetics.2021; 31(3): 95.     CrossRef
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    Nivedita Thakur, Thomas Klopstock, Suzanne Jackowski, Enej Kuscer, Fernando Tricta, Aleksandar Videnovic, Hyder A. Jinnah
    Movement Disorders.2021; 36(9): 2005.     CrossRef
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    Ali S. Shalash, Thomas W. Rösler, Ibrahim Y. Abdelrahman, Hatem S. Abulmakarem, Stefanie H. Müller, Franziska Hopfner, Gregor Kuhlenbäumer, Günter U. Höglinger, Mohamed Salama
    Heliyon.2021; : e07469.     CrossRef
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    Jeanne Feuerstein, Caroline Olvera, Michelle Fullard
    Movement Disorders Clinical Practice.2020;[Epub]     CrossRef
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    Randall D. Marshall, Abigail Collins, Maria L. Escolar, H. A. Jinnah, Thomas Klopstock, Michael C. Kruer, Aleksandar Videnovic, Amy Robichaux-Viehoever, Colleen Burns, Laura L. Swett, Dennis A. Revicki, Randall H. Bender, William R. Lenderking
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    Jong Kyu Park, Jinyoung Youn, Jin Whan Cho
    Precision and Future Medicine.2019; 3(3): 135.     CrossRef
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    C. Tello, A. Darling, V. Lupo, B. Pérez‐Dueñas, C. Espinós
    Clinical Genetics.2018; 93(4): 731.     CrossRef
  • Looking Deep into the Eye-of-the-Tiger in Pantothenate Kinase–Associated Neurodegeneration
    J.-H. Lee, A. Gregory, P. Hogarth, C. Rogers, S.J. Hayflick
    American Journal of Neuroradiology.2018; 39(3): 583.     CrossRef
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    Edward Botsford, Jayan George, Ellen Buckley
    Brain Sciences.2018; 8(11): 194.     CrossRef
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  • Missions of <italic>Journal of Movement Disorders</italic>
    Yun Joong Kim
    Journal of Movement Disorders.2016; 9(1): 1.     CrossRef
Current Status of Huntington’s Disease in Korea: A Nationwide Survey and National Registry Analysis
Hyun Sook Kim, Chul Hyoung Lyoo, Phil Hyu Lee, Sang Jin Kim, Mee Young Park, Hyeo-Il Ma, Jae Hyeok Lee, Sook Kun Song, Jong Sam Baik, Jin Ho Kim, Myung Sik Lee
J Mov Disord. 2015;8(1):14-20.   Published online January 31, 2015
DOI: https://doi.org/10.14802/jmd.14038
  • 17,719 View
  • 124 Download
  • 20 Web of Science
  • 19 Crossref
AbstractAbstract PDF
Objective Huntington’s disease (HD) is a rare neurological disorder, and its current status in Korea is not well investigated. This study aims to determine the prevalence and incidence of HD and to investigate the clinical features of HD patients in Korea.
Methods We estimated the crude prevalence and annual incidence of HD based on the databases of the Rare Diseases Registry (RDR) and the National Health Insurance (NHI). The clinical data of genetically confirmed HD patients was collected from 10 referral hospitals and analyzed.
Results The mean calculated annual incidence was 0.06 cases per 100,000 persons, and the mean calculated prevalence was 0.38 based on the NHI database. The estimated crude prevalence based on the RDR was 0.41. Of the sixty-eight HD patients recruited, the mean age of onset was 44.16 ± 14.08 years and chorea was most frequently reported as the initial symptom and chief complaint. The mean CAG repeat number of the expanded allele was 44.7 ± 4.8 and correlated inversely with the age of onset (p < 0.001). About two-thirds of the patients have a positive family history, and HD patients without positive family history showed a delay in onset of initial symptoms, a prolonged interval between initial symptom onset and genetic diagnosis and a delay in the age of genetic diagnosis.
Conclusions To the best of our knowledge, this is the first study to estimate the prevalence and incidence of HD in Korea and the largest HD series in the Asian population. Our analyses might be useful for further studies and large-scale investigations in HD patients.

Citations

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    Parkinsonism & Related Disorders.2024; 118: 105930.     CrossRef
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    Journal of Clinical Neurology.2023; 19(6): 558.     CrossRef
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Case Report
A Case of Adrenoleukodystrophy Presenting as Progressive Cerebellar Dysfunction
Seunguk Jung, Jong Won Chung, Ji Young Yun, Han-Joon Kim, Beom Seok Jeon
J Mov Disord. 2009;2(2):91-94.
DOI: https://doi.org/10.14802/jmd.09025
  • 14,433 View
  • 84 Download
  • 4 Crossref
AbstractAbstract PDF

X-linked adrenoleukodystrophy (X-ALD) is a hereditary neurological disorder affecting the nervous system and adrenal cortex. The phenotype of X-ALD ranges from the rapidly progressive cerebral form to milder adrenomyeloneuropathy. However, cerebellar manifestations are rare. We report a case of adrenoleukodystrophy presenting as progressive cerebellar dysfunction resembling olivopontocerebellar degeneration, with a review of the literature

Citations

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JMD : Journal of Movement Disorders