Updated on 2026/04/02

写真a

 
Ando Masahiro
 
Organization
University Hospital, Medical and Dental Sciences Area University Hospital Clinical Center Neurology Disease Center Assistant Professor
Title
Assistant Professor
Degree
(2018.4)
External link

Research Interests

  • Neurogenetics

  • Charcot-Marie-Tooth disease

  • Hereditary ataxia

  • Bioinformatics

  • R

  • 脊髄性筋萎縮症

Research Areas

Genetics, Neurology

Research History

  • 2026.4    Kagoshima University   Lecturer

  • 2023.11 - 2026.3    Kagoshima University   Assistant Professor

  • 2022.4 - 2023.10    Kagoshima University   Assistant Professor

Professional Memberships

 

Papers

  • Masahiro Ando, Yujiro Higuchi, Jun-Hui Yuan, Akiko Yoshimura, Chikashi Yano, Takahiro Hobara, Fumikazu Kojima, Yu Hiramatsu, Satoshi Nozuma, Tomonori Nakamura, Yusuke Sakiyama, Jun Mitsui, Shoji Tsuji, Hiroshi Takashima .  Nationwide Characterization of MFN2-Related CMT in 176 Japanese Patients: Clinical and Genetic Insights. .  Annals of clinical and translational neurology13 ( 1 ) 170 - 179   2026.1International journal

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    BACKGROUND: Mitofusin 2 (MFN2) is a major causative gene for axonal Charcot - Marie - Tooth disease type 2A (CMT2A), with a wide phenotypic spectrum. Comprehensive large - scale genotype - phenotype association studies are essential for understanding disease pathogenesis and improved clinical management. METHODS: We conducted a nationwide retrospective study of 176 Japanese patients with genetically confirmed pathogenic or likely pathogenic MFN2 variants encompassing clinical, electrophysiological, and genetic characterization. RESULTS: MFN2 was the second most frequent causative gene among 1211 genetically diagnosed inherited peripheral neuropathy cases in Japan. A total of 76 MFN2 variants were identified, including nine novel likely pathogenic variants. Disease onset occurred at a mean age of 11.1 years, with distal motor weakness and tibialis anterior involvement as prominent features. Sensory symptoms were present in ~60% of patients and were more common in cases with longer disease duration. Central and systemic features, including pyramidal signs, optic atrophy, and vocal cord paralysis, were also observed. Electrophysiological studies revealed a predominantly axonal sensorimotor pattern, with relatively preserved upper limb conduction and marked lower limb abnormalities. Importantly, 24 patients (16%) were non-ambulatory, with earlier onset and greater weakness. Domain-based analysis further revealed that variant location may influence age at onset. CONCLUSION: This large-scale study highlights the genetic and clinical diversity of MFN2-related CMT in Japan. Our findings confirm a motor-dominant, length-dependent axonal neuropathy with additional sensory and systemic features in some cases. These results emphasize the importance of early diagnosis, genotype-informed care, and long-term follow-up in managing MFN2-related CMT.

    DOI: 10.1002/acn3.70218

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  • Ando M, Higuchi Y, Yuan JH, Yoshimura A, Yano C, Hobara T, Kojima F, Hiramatsu Y, Nozuma S, Nakamura T, Sakiyama Y, Hashiguchi A, Okamoto Y, Matsushige T, Mitsui J, Tsuji S, Takashima H. .  SOD1-related inherited peripheral neuropathies in a Japanese cohort: genetic variants and clinical insights. .  Journal of Neurology272 ( 3 ) 191 - 191   2025.2Reviewed

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    DOI: 10.1007/s00415-025-12925-4

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  • Hobara T, Ando M, Higuchi Y, Yuan JH, Yoshimura A, Kojima F, Noguchi Y, Takei J, Hiramatsu Y, Nozuma S, Nakamura T, Adachi T, Toyooka K, Yamashita T, Sakiyama Y, Hashiguchi A, Matsuura E, Okamoto Y, Takashima H. .  Linking LRP12 CGG repeat expansion to inherited peripheral neuropathy. .  J Neurol Neurosurg Psychiatry96 ( 2 ) 140 - 149   2024.6Reviewed

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    DOI: 10.1136/jnnp-2024-333403

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  • Ando M, Higuchi Y, Yuan J, Yoshimura A, Kojima F, Yamanishi Y, Aso Y, Izumi K, Imada M, Maki Y, Nakagawa H, Hobara T, Noguchi Y, Takei J, Hiramatsu Y, Nozuma S, Sakiyama Y, Hashiguchi A, Matsuura E, Okamoto Y, Takashima H. .  Clinical variability associated with intronic FGF14 GAA repeat expansion in Japan .  Ann Clin Transl Neurol.11 ( 1 ) 96 - 104   2024.1Reviewed

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    DOI: 10.1002/acn3.51936

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  • Ando M, Higuchi Y, Yuan JH, Yoshimura A, Dozono M, Hobara T, Kojima F, Noguchi Y, Takeuchi M, Takei J, Hiramatsu Y, Nozuma S, Nakamura T, Sakiyama Y, Hashiguchi A, Matsuura E, Okamoto Y, Sone J, Takashima H. .  Clinical phenotypic diversity of NOTCH2NLC-related disease in the largest case series of inherited peripheral neuropathy in Japan .  J Neurol Neurosurg Psychiatry94 ( 8 ) 622 - 630   2023.3Reviewed

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    DOI: 10.1136/jnnp-2022-330769

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  • Ando M, Higuchi Y, Okamoto Y, Yuan J, Yoshimura A, Takei J, Taniguchi T, Hiramatsu Y, Sakiyama Y, Hashiguchi A, Matsuura E, Nakagawa H, Sonoda K, Yamashita T, Tamura A, Terasawa H, Mitsui J, Ishiura H, Tsuji S, Takashima H .  An NEFH founder mutation causes broad phenotypic spectrum in multiple Japanese families .  J Hum Genet67 ( 7 ) 399 - 403   2022Reviewed

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    DOI: 10.1038/s10038-022-01019-y

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  • Ando M, Higuchi Y, Yuan JH, Yoshimura A, Kitao R, Morimoto T, Taniguchi T, Takeuchi M, Takei J, Hiramatsu Y, Sakiyama Y, Hashiguchi A, Okamoto Y, Mitsui J, Ishiura H, Tsuji S, Takashima H .  Novel de novo POLR3B mutations responsible for demyelinating Charcot-Marie-Tooth disease in Japan .  Ann Clin Transl Neurol9 ( 5 ) 747 - 755   2022Reviewed

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    DOI: 10.1002/acn3.51555.

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  • Ando M, Higuchi Y, Yuan J, Yoshimura A, Taniguchi T, Takei J, Takeuchi M, Hiramatsu Y, Shimizu F, Kubota M, Takeshima A, Ueda T, Koh K, Nagaoka U, Tokashiki T, Sawai S, Sakiyama Y, Hashiguchi A, Sato R, Kanda T, Okamoto Y, Takashima H .  Novel heterozygous variants of SLC12A6 in Japanese families with Charcot-Marie-Tooth disease .  Ann Clin Transl Neurol9 ( 7 ) 902 - 911   2022Reviewed

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    DOI: 10.1002/acn3.51603.

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  • Ando M, Higuchi Y, Yuan J, Yoshimura A, Taniguchi T, Kojima F, Noguchi Y, Hobara T, Takeuchi M, Takei J, Hiramatsu Y, Sakiyama Y, Hashiguchi A, Okamoto Y, Mitsui J, Ishiura H, Tsuji S, Takashima H .  Comprehensive Genetic Analyses of Inherited Peripheral Neuropathies in Japan: Making Early Diagnosis Possible .  Biomedicines10 ( 7 ) 1546   2022Reviewed

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    DOI: 10.3390/biomedicines10071546.

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  • Ando M, Higuchi Y, Yuan JH, Yoshimura A, Higashi S, Takeuchi M, Hobara T, Kojima F, Noguchi Y, Takei J, Hiramatsu Y, Nozuma S, Sakiyama Y, Hashiguchi A, Matsuura E, Okamoto Y, Nagai M, Takashima H .  Genetic and clinical features of cerebellar ataxia with RFC1 biallelic repeat expansions in Japan .  Front Neurol10 ( 13 ) 952493   2022Reviewed

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    DOI: 10.3389/fneur.2022.952493.

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  • Ando M, Hashiguchi A, Okamoto Y, Yoshimura A, Hiramatsu Y, Yuan J, Higuchi Y, Mitsui J, Ishiura H, Umemura A, Maruyama K, Matsushige T, Morishita S, Nakagawa M, Tsuji S, Takashima H .  Clinical and genetic diversities of Charcot-Marie-Tooth disease with MFN2 mutations in a large case study .  J Peripher Nerv Syst22 ( 3 ) 191 - 199   2017Reviewed

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    DOI: 10.1111/jns.12228

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  • Ando M, Okamoto Y, Yoshimura A, Yuan JH, Hiramatsu Y, Higuchi Y, Hashiguchi A, Mitsui J, Ishiura H, Fukumura S, Matsushima M, Ochi N, Tsugawa J, Morishita S, Tsuji S, Takashima H .  Clinical and mutational spectrum of Charcot-Marie-Tooth disease type 2Z caused by MORC2 variants in Japan .  Eur J Neurol24 ( 10 ) 1274 - 1282   2017Reviewed

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    DOI: 10.1111/ene.13360

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  • Yuan JH, Higuchi Y, Ando M, Yoshimura A, Nozuma S, Sakiyama Y, Kanda T, Nomoto M, Nakamura T, Nobuhara Y, Takashima H .  Functional and Epigenomic Consequences of DNMT1 Variants in Inherited Neurological Disorders. .  International journal of molecular sciences27 ( 3 )   2026.1

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    DNMT1 variants are linked to complex neurodegenerative syndromes, yet their variant-specific functional and epigenomic consequences remain poorly defined. DNMT1 variants were identified in eight patients using gene-panel or whole-exome sequencing. Functional effects were assessed by site-directed mutagenesis and transient expression in HEK293T cells. Genome-wide methylation profiling of peripheral blood leukocyte DNA was performed using Nanopore sequencing, enabling direct quantification of 5-methylcytosine (5mC). CpG island-level differential methylation and gene set enrichment analysis (GSEA) were conducted. Variants in the replication foci targeting sequence (RFTS) domain (p.Y511H, p.Y540C, p.H569R) exhibited reduced DNMT1 protein expression, decreased enzymatic activity, and cytosolic aggregation. Variants in the C-terminal catalytic domain (p.A1334V and p.P1546S) showed reduced protein expression with relatively mild enzymatic impairment. Patients carrying the p.Y511H variant demonstrated a significant reduction in global 5mC levels compared with controls. Principal component analysis revealed distinct methylomic profiles separating most patients from controls, with marked intra- and inter-familial heterogeneity. CpG island-level analysis identified a single significantly hypomethylated region in p.Y511H carriers, and GSEA revealed differential enrichment of multiple Gene Ontology biological pathways. This study defines domain-dependent functional effects of DNMT1 variants and provides the first nanopore-based methylome analysis, revealing variant-specific and heterogeneous epigenomic alterations.

    DOI: 10.3390/ijms27031232

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  • Chikashi Yano, Masahiro Ando, Yujiro Higuchi, Jun-Hui Yuan, Akiko Yoshimura, Takahiro Hobara, Risa Nagatomo, Fumikazu Kojima, Yu Hiramatsu, Satoshi Nozuma, Tomonori Nakamura, Yusuke Sakiyama, Chika Matsuoka, Toru Yamashita, Takashi Kimura, Ayako Miyazaki, Chinatsu Kinjo, Kenji Yokochi, Nanami Yamanaka, Nozomu Matsuda, Tomoki Suichi, Yoshiyuki Hanaoka, Haruka Kojima, Kenichi Todo, Hiroyuki Ishiura, Jun Mitsui, Shoji Tsuji, Hiroshi Takashima .  INF2-Related Charcot-Marie-Tooth Disease in a Japanese Cohort: Genetic and Clinical Insights. .  Annals of clinical and translational neurology13 ( 1 ) 49 - 57   2026.1International journal

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    BACKGROUND: INF2 mutations cause focal segmental glomerulosclerosis (FSGS) and Charcot-Marie-Tooth disease (CMT). Accurate genetic diagnosis is critical, as INF2-related FSGS is typically resistant to immunotherapy yet rarely recurs after transplantation, and its associated neuropathy can mimic treatable immune-mediated disorders such as chronic inflammatory demyelinating polyradiculoneuropathy (CIDP). METHODS: We performed a multicenter study investigating 3329 Japanese patients with inherited peripheral neuropathies/CMT who underwent gene panel sequencing or whole-exome analysis between 2007 and 2024. Clinical data, including electrophysiological assessments, were obtained from the patients' medical records. RESULTS: We identified six pathogenic INF2 variants in eight patients, all of which were located within the diaphanous inhibitory domain. Structural modeling revealed clustering of variants near the diaphanous autoregulatory domain-binding pocket, which is critical for INF2 autoinhibition. Clinically, all cases were sporadic, with a median age at neurological onset of 9 years. All patients exhibited lower limb weakness, and 6/8 (75%) had sensory disturbances. All patients also developed kidney dysfunction, with 7/8 (88%) progressing to end-stage renal disease at a median age of 15 years. Furthermore, all patients showed demyelinating neuropathy, and 2/8 (25%) received immunotherapy due to suspected immune-mediated neuropathy. CONCLUSION: Although INF2 variants are a rare cause of CMT in Japan, they should be considered in pediatric patients with demyelinating neuropathy and early-onset proteinuria, even in the absence of a family history. Blood and urine tests assessing renal dysfunction can provide guidance for appropriate genetic testing.

    DOI: 10.1002/acn3.70205

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  • Jun-Hui Yuan, Yujiro Higuchi, Masahiro Ando, Akihiro Hashiguchi, Yuji Okamoto, Yu Hiramatsu, Akiko Yoshimura, Kento Kodama, Yusuke Sakiyama, Jun Mitsui, Shoji Tsuji, Hiroshi Takashima .  Respiratory complex I deficiency caused by a novel multi-exonic PUS1 deletion. .  Journal of human genetics   2025.12International journal

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    Myopathy, lactic acidosis, and sideroblastic anemia type 1 (MLASA1) is an extremely rare mitochondrial disorder caused by biallelic pathogenic variants in PUS1, which encodes a mitochondrial tRNA pseudouridine synthase essential for mitochondrial protein synthesis. We describe two affected siblings presenting with progressive myopathy, lactic acidosis, sideroblastic anemia, short stature, developmental delay, and mild cognitive impairment. Depth-based copy number variation analysis of whole-exome sequencing data revealed a novel homozygous multi-exonic deletion in PUS1. The deletion breakpoints were defined by Sanger sequencing as a 9964 bp deletion spanning part of intron 3 through exons 4-6 and extending into the 3' untranslated region, resulting in complete loss of the C-terminal coding region. Skeletal muscle histology demonstrated ragged red fibers, whereas immunohistochemistry showed a selective and near-complete loss of NDUFB8, indicating impaired assembly of respiratory chain complex I. A systematic review of previously reported MLASA1 cases revealed marked clinical heterogeneity, including frequent developmental delay, dysmorphic features, and multi-organ involvement. These findings expand the genotypic and phenotypic landscape of MLASA1 and highlight the diagnostic value of copy number variation analysis in unresolved mitochondrial disorders. The impairment of complex I underscores the particular vulnerability of translation-dependent respiratory chain components in PUS1-related diseases.

    DOI: 10.1038/s10038-025-01437-8

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  • Yuan JH, Higuchi Y, Ando M, Hiramatsu Y, Yoshimura A, Hobara T, Kojima F, Nakamura T, Sakiyama Y, Nozuma S, Ohyama S, Mitsui J, Tsuji S, Takashima H .  Frameshift and Copy Number Variants in SACS-Related Neuropathy. .  Neurology. Genetics11 ( 6 ) e200318   2025.12

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    DOI: 10.1212/NXG.0000000000200318

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  • Risa Nagatomo, Yu Hiramatsu, Yusuke Sakiyama, Hiroaki Miyahara, Takuma Nasu, Ieharu Yamazaki, Akiko Yoshimura, Masahiro Ando, Satoshi Nozuma, Yujiro Higuchi, Akio Akagi, Yasushi Iwasaki, Jun-Hui Yuan, Yuji Okamoto, Hiroshi Takashima .  Systemic mitochondrial involvement in mitochondrial myopathy with episodic hyper-creatine kinase-emia: insights from an autopsy case. .  Journal of neurology272 ( 9 ) 576 - 576   2025.8International journal

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    DOI: 10.1007/s00415-025-13326-3

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  • Hobara T, Ando M, Higuchi Y, Yuan JH, Yoshimura A, Saito T, Shiihara T, Okuda S, Fukushima N, Awano H, Inoue T, Yano C, Kojima F, Kodama K, Hiramatsu Y, Nozuma S, Nakamura T, Sakiyama Y, Hashiguchi A, Mitsui J, Tsuji S, Takashima H .  Charcot-Marie-Tooth-like presentation in giant axonal neuropathy: clinical variability and prevalence in a large Japanese case series .  J Neurol272 ( 8 ) 514 - 514   2025.7Reviewed International journal

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    BACKGROUND: Giant axonal neuropathy 1 (GAN) is a rare neurodegenerative disorder with autosomal recessive inheritance and significant phenotypic heterogeneity, ranging from milder presentations resembling Charcot-Marie-Tooth disease (CMT) to classical presentations involving central and peripheral nervous systems. We investigated the genetic and clinical spectrum of GAN in Japanese patients with inherited peripheral neuropathies (IPNs). METHODS: We conducted genetic screening of 3315 Japanese patients diagnosed with IPNs between 2007 and 2023 using targeted next-generation or whole-exome sequencing. Variant pathogenicity, clinical features, and neurophysiological and neuroimaging findings were reviewed. RESULTS: We identified seven biallelic GAN variants in five patients from four unrelated families, including one homozygous and three compound heterozygous genotypes. Two novel pathogenic variants were identified: c.922G > T (p.Glu308*) and c.456dup (p.Ala153Cysfs*27). Two families exhibited the classical phenotype, whereas the other two exhibited a CMT-like phenotype. Mean onset age was 4.4 years (range 1.5-8), and gait disturbance was the initial symptom. The most common findings included distal weakness (n = 5), sensory impairment (n = 4), scoliosis (n = 3), autonomic dysfunction (n = 2). Neurophysiologically, all patients had sensorimotor axonal polyneuropathy. One patient with mild phenotype maintained a CMT-like state without systemic involvement until the age of 43 years and was still alive at 72, representing the longest documented survival in GAN. CONCLUSION: This study expands the genetic and phenotypic spectrum of GAN by identifying novel variants and a long-term survivor. These findings underscore the importance of systematic genetic screening for GAN in pediatric-onset CMT, even in the absence of classical features.

    DOI: 10.1007/s00415-025-13243-5

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  • Watanabe R, Papatriantafyllou JD, Maeda K, Aguirre GK, Ando M, Benoit B, Grossman M, Irwin DJ, Kim B, Massimo L, McMillan CT, Papageorgiou SG, Phillips JS, Shiraishi T, Sugihara Y, Suh E, Takashima H, Toro C, Van Deerlin VM, Nasrallah IM, Lee EB .  Clinicopathological characterization of vacuolar tauopathy associated with VCP D395G .  Alzheimers Dement21 ( 7 ) e70427   2025.7Reviewed International coauthorship International journal

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    INTRODUCTION: The clinical, radiological, and pathological features have not been well documented for the recently discovered autosomal-dominant vacuolar tauopathy (VT) harboring the Valosin-containing protein (VCP) p.Asp395Gly variant. METHODS: We investigated the clinical, neuropsychological, physiological, laboratory, and radiological data and neuropathological findings in five symptomatic VT cases who met the diagnostic criteria for frontotemporal dementia (FTD). Radiological data were also collected from two pre-symptomatic carriers. RESULTS: All participants had heterozygous c.1184A > G, p.Asp395Gly in VCP. All symptomatic cases exhibited cognitive, behavioral, and/or language dysfunction indicative of FTD in their 30s to 50s. Neuroimaging studies revealed marked bilateral frontal neurodegeneration and occipital lobar diffusion abnormalities. Post mortem examination of three cases and brain biopsy of one case revealed abundant three- and four-repeat tau deposition and neocortical microvacuolization. Radiological changes were not evident in two pre-symptomatic carriers in their 20s. DISCUSSION: This study reveals distinct clinical-radiological-pathological correlations in VT, expanding the spectrum of early-onset frontotemporal lobar degeneration (FTLD). HIGHLIGHTS: We characterized the clinical, radiological, and pathological features of vacuolar tauopathy (VT). Five VT cases exhibited a behavioral syndrome, often with aphasic features, with marked frontal lobar atrophy and hypometabolism. Magnetic resonance imaging (MRI) of VT cases revealed occipital lobar diffusion abnormalities. Diffuse neurofibrillary tangles (NFTs) and microvacuolization were observed in the neocortex, with an inverse distribution.

    DOI: 10.1002/alz.70427

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  • 安藤 匡宏, 穂原 貴裕, 樋口 雄二郎, 高嶋 博 .  【遺伝性ニューロパチーの進歩】リピート伸長と遺伝性ニューロパチー .  末梢神経36 ( 1 ) 14 - 20   2025.7

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    Authorship:Lead author   Language:Japanese   Publisher:日本末梢神経学会  

    近年の遺伝子解析技術の進展に伴い,遺伝性神経筋疾患におけるリピート伸長異常の同定が進んでおり,遺伝性ニューロパチーの診断においてもその重要性が高まっている。わが国の遺伝性ニューロパチー3,180症例に対する遺伝子解析では遺伝子診断例の10.9%がLRP12,RFC1,NOTCH2NLCのリピート伸長異常に起因していた。これらのリピート伸長異常はいずれも成人発症で,LRP12では運動神経障害が優位,RFC1では感覚障害が優位,NOTCH2NLCでは中間型の電気生理所見が特徴的である。本稿では,遺伝性ニューロパチーにおけるこれら3遺伝子のリピート伸長異常について概説する。(著者抄録)

  • Yano C, Matsuura E, Nakamura T, Sonoda A, Shigehisa A, Ando M, Nozuma S, Higuchi Y, Sakiyama Y, Hashiguchi A, Michizono K, Takashima H .  Visual evoked potential in myelin oligodendrocyte glycoprotein antibody-associated disease .  Mult Scler Relat Disord98   106408 - 106408   2025.6Reviewed International journal

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    The visual evoked potential (VEP) patterns of optic neuritis are known to often differ between multiple sclerosis (MS) and neuromyelitis optica spectrum disorder (NMOSD) but have been less reported in myelin oligodendrocyte glycoprotein antibody-associated disease (MOGAD). This study aimed to characterize the VEP pattern in MOGAD and evaluate its utility in distinguishing MOGAD from MS and NMOSD. We retrospectively reviewed the clinical manifestations and VEP findings in patients with MS (n = 29), NMOSD (n = 14), and MOGAD (n = 10). In eyes with acute visual impairment, VEP responses were detectable in 100 % of eyes with MOGAD, a striking difference from MS (72.7 %) and NMOSD (57.1 %). In addition, VEP abnormalities in eyes without acute visual impairment were rare in MOGAD (23.1 %) compared to MS (55.3 %) and NMOSD (42.9 %). Our results indicated that subclinical VEP abnormalities or undetectable VEP responses were less common in patients with MOGAD compared to patients with MS and NMOSD. VEP testing demonstrates potential diagnostic utility in distinguishing among these conditions.

    DOI: 10.1016/j.msard.2025.106408

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  • Peymani F, Ebihara T, Smirnov D, Kopajtich R, Ando M, Bertini E, Carrozzo R, Diodato D, Distelmaier F, Fang F, Ghezzi D, Hempel M, Iwanicka-Pronicka K, Klopstock T, Stenton SL, Lamperti C, Liu Z, Murtazina A, Okamoto Y, Okazaki Y, Piekutowska-Abramczuk D, Rötig A, Ryzhkova O, Schlein C, Shagina O, Takashima H, Tsygankova PG, Zech M, Meitinger T, Shimura M, Murayama K, Prokisch H .  Pleiotropic effects of MORC2 derive from its epigenetic signature .  Brain149 ( 1 ) awaf159 - 177   2025.4Reviewed International coauthorship International journal

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    Heterozygous missense mutations in MORC2 have been implicated in various clinical entities, ranging from early-onset neurodevelopmental disorders to late-onset neuropathies. The mechanism underlying the phenotypic heterogeneity and pleiotropic effects of MORC2 has remained elusive. Here, we analyzed blood and fibroblast DNA methylation, transcriptomes, proteomes, and phenotypes of 53 MORC2 patients. We identified a MORC2-specific DNA methylation episignature that is universal across all MORC2-associated phenotypes and conserved across different tissues. The MORC2 episignature consists mainly of DNA hypermethylation in promoter regions, leading to transcriptional repression of target genes resulting in a MORC2-specific RNA signature. Concomitant downregulation of three disease-associated genes -ERCC8, NDUFAF2, and FKTN- at different levels mirrors the variable biochemical defects and clinical manifestations observed in MORC2 patients. Silencing of NDUFAF2 accounts for the Leigh syndrome manifestation, whereas dysmorphic features are due to the repression of ERCC8. Overall, we showed that pathogenic MORC2 variants cause specific episignature, whereby methylation level variability and its repression impact on target genes explains the pleiotropy and predicts phenotypic heterogeneity in MORC2-related disorders. We predict that epigenetic variation may underlie pleiotropy in other Mendelian disorders.

    DOI: 10.1093/brain/awaf159

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  • Sakiyama Y, Yuan JH, Yoshimura A, Takeuchi M, Maki Y, Mori T, Takei J, Ando M, Hiramatsu Y, Nozuma S, Higuchi Y, Yonezawa H, Kirishima M, Suzuki M, Kano T, Tarisawa M, Hashiguchi S, Kunii M, Sato S, Takahashi-Iwata I, Hashiguchi A, Matsuura E, Izumo S, Tanimoto A, Takashima H .  Brain biopsy and metagenomic sequencing enhance aetiological diagnosis of encephalitis .  Brain Commun7 ( 3 ) fcaf165   2025.4Reviewed International journal

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    Identifying the aetiology of CNS diseases, regardless of their infectious or non-infectious nature, is often intricate. Next-generation sequencing (NGS) has emerged as a powerful tool for sensitive and unbiased screening of tissue or body fluid specimens. This study aimed to investigate the underlying aetiology of patients with suspected infectious CNS diseases. Between April 2013 and October 2021, we collected brain tissue samples from 33 patients diagnosed with encephalitis or encephalitis-like CNS diseases, obtained via biopsy or autopsy, and underwent metagenomic NGS (mNGS) in conjunction with pathological evaluations. Moreover, we employed PCR-based assays and pathogen-specific immunostaining to corroborate the presence of pathogens within the tissue samples. Among the 33 patients, mNGS elucidated pathogen-specific genomic sequences in 7 cases (21.2%), including halobacteria (archaea), Balamuthia mandrillaris, Epstein-Barr virus, Toxoplasma gondii and herpes simplex virus. Additionally, brain tissue mNGS ruled out known pathogens, identifying 14 cases (42.4%) of non-infectious CNS diseases, which included neoplastic, autoimmune/inflammatory and amyloid angiopathy conditions. The adjustment of therapeutic strategies based on these findings led to improvements in clinical symptoms, imaging outcomes and patient prognosis. Brain biopsy serves as both a direct pathological research target and a valuable source of samples for unbiased high-throughput sequencing. Our study illustrates the reliability of mNGS on brain tissue, which significantly improves the diagnostic rate for suspected encephalitis or encephalitis-like diseases of unknown aetiology. These findings underscore the importance of mNGS in guiding more precise and effective therapeutic interventions for patients in clinical practice.

    DOI: 10.1093/braincomms/fcaf165

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  • Yano C, Nakamura T, Ando M, Higuchi Y, Yuan JH, Yoshimura A, Hobara T, Kojima F, Hiramatsu Y, Nozuma S, Sakiyama Y, Hashiguchi A, Rosales RL, Arimura K, Takashima H .  Tibial to ulnar nerve amplitude ratio as a marker of length-dependent neuropathy. .  Clinical neurophysiology practice10   499 - 506   2025

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    Objective: To evaluate the utility of nerve conduction studies as a marker of length-dependent neuropathy. Methods: We conducted a retrospective study of 44 chronic inflammatory demyelinating polyradiculoneuropathy (CIDP) patients and 365 genetically confirmed Charcot-Marie-Tooth disease (CMT) patients, including those with PMP22 duplications or mutations in GJB1, MFN2, MPZ, and MME. Nerve conduction study parameters were compared, with subgroup analyses of CIDP-mimicking CMT (genetically confirmed CMT with a prior clinical diagnosis of CIDP) and gene-based classifications. Receiver operating characteristic (ROC) analysis assessed the sensitivity and specificity of these parameters. Results: The tibial to ulnar nerve distal compound muscle action potential (T/U CMAP) amplitude ratio was significantly higher in CIDP patients compared to those with genetically confirmed CMT, CIDP-mimicking CMT, and gene-based subgroups. This ratio yielded the highest area under the curve (AUC: 0.95) among all evaluated parameters, with a cutoff value of 0.385 demonstrating high diagnostic sensitivity (95.5%) and specificity (85.5%). In CIDP-mimicking CMT group, a similar sensitivity and specificity were observed. Conclusions: The T/U CMAP amplitude ratio is a simple, robust electrophysiological index of length-dependent neuropathy. Significance: This marker offers a reliable and accessible way to distinguish between acquired and inherited neuropathies, improving diagnostic accuracy and helping prioritize genetic testing.

    DOI: 10.1016/j.cnp.2025.10.006

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  • ANDO Masahiro, HOBARA Takahiro, HIGUCHI Yujiro, TAKASHIMA Hiroshi .  Repeat expansions in inherited neuropathy: insights from LRP12, RFC1 and NOTCH2NLC .  Peripheral Nerve36 ( 1 ) 14 - 20   2025

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    <p> Recent advances in genetic analysis technologies have led to significant progress in identifying repeat expansion abnormalities in hereditary neuromuscular diseases. These developments have also increased the importance of repeat expansion analysis in diagnosing hereditary peripheral neuropathies ( IPN ) . In a comprehensive genetic analysis of 3,180 Japanese patients suspected of having IPN, 10.9% of the genetically diagnosed cases were found to be caused by repeat expansions in the LRP12, RFC1 and NOTCH2NLC genes. Each of these repeat expansions is associated with adult-onset symptoms. LRP12-related repeat expansions primarily manifest as motor nerve dysfunction, with most patients presenting muscle weakness and atrophy, while sensory disturbances are relatively rare. In contrast, RFC1 repeat expansions predominantly cause sensory impairments, with most patients displaying sensory neuropathy and minimal muscle weakness. Furthermore, NOTCH2NLC-related expansions are associated with intermediate electrophysiological findings, and about half of the patients also exhibit autonomic nervous system involvement, such as neurogenic bladder. These repeat expansions are critical in refining the diagnosis and understanding of the clinical spectrum of hereditary peripheral neuropathies. This review provides an in-depth overview of the clinical characteristics, electrophysiological findings, and molecular mechanisms of the LRP12, RFC1 and NOTCH2NLC repeat expansions, with a particular focus on their roles in the pathogenesis of hereditary neuropathies.</p>

    DOI: 10.69407/jpns.36.1_14

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  • Hobara T, Higuchi Y, Yoshida M, Suehara M, Ando M, Yuan JH, Yoshimura A, Kojima F, Matsuura E, Okamoto Y, Mitsui J, Tsuji S, Takashima H. .  Genetic and pathophysiological insights from autopsied patient with primary familial brain calcification: novel MYORG variants and astrocytic implications. .  Acta Neuropathol Commun.12 ( 1 ) 136   2024.8Reviewed

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  • Kojima F, Okamoto Y, Ando M, Higuchi Y, Hobara T, Yuan J, Yoshimura A, Hashiguchi A, Matsuura E, Takashima H. .  A novel homozygous HPDL variant in Japanese siblings with autosomal recessive hereditary spastic paraplegia: case report and literature review. .  Neurogenetics25 ( 2 ) 149 - 156   2024.4Reviewed

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  • Nozuma S., Yuji-Takeuchi M., Nakamura T., Saigo R., Masuda M., Ando M., Sakiyama Y., Miyata R., Tabata K., Matsuura E., Takashima H. .  A case of severe paraneoplastic glutamic acid decarboxylase antibody-spectrum disorder with improvement through prior immunotherapy before surgical intervention .  Clinical and Experimental Neuroimmunology14 ( 4 ) 202 - 206   2023.11

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    Background: Initially associated with stiff-person syndrome, antibodies to glutamic acid decarboxylase (GAD) antibodies are now recognized as indicators of GAD antibody-spectrum disorders (GAD-SD), which encompass cerebellar ataxia, autoimmune epilepsy and limbic encephalitis. Paraneoplastic neurological syndromes associated with GAD-SD are rare, and optimal timing of surgical intervention and impact on neurological symptoms remain poorly understood. Case Presentation: We present the case of a 65-year-old woman who developed overlapping symptoms of cerebellar ataxia and stiff-person syndrome detected through high-titer GAD antibodies in both serum and cerebrospinal fluid, alongside the presence of a thymoma. Due to severe dysphagia and gait ataxia that rendered her bedridden on admission, surgical intervention was initially deferred. Instead, she received immunotherapies including intravenous methylprednisolone and intravenous immunoglobulin, which remarkably improved neurological symptoms. However, a decline in symptoms occurred on tapering oral prednisolone. Subsequently, a thoracoscopic thymectomy was carried out 27 months after symptom onset, leading to further neurological improvement and successful reduction of prednisolone. Conclusion: In paraneoplastic GAD-SD cases with severe symptoms at presentation, prioritizing immunotherapy and considering surgical intervention once the symptoms have stabilized might be advantageous.

    DOI: 10.1111/cen3.12764

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  • Hirano M, Kuwahara M, Yamagishi Y, Samukawa M, Fujii K, Yamashita S, Ando M, Oka N, Nagano M, Matsui T, Takeuchi T, Saigoh K, Kusunoki S, Takashima H, Nagai Y .  CANVAS-related RFC1 mutations in patients with immune-mediated neuropathy. .  Scientific reports13 ( 1 ) 17801   2023.10

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    Cerebellar ataxia, neuropathy, and vestibular areflexia syndrome (CANVAS) has recently been attributed to biallelic repeat expansions in RFC1. More recently, the disease entity has expanded to atypical phenotypes, including chronic neuropathy without cerebellar ataxia or vestibular areflexia. Very recently, RFC1 expansions were found in patients with Sjögren syndrome who had neuropathy that did not respond to immunotherapy. In this study RFC1 was examined in 240 patients with acute or chronic neuropathies, including 105 with Guillain-Barré syndrome or Miller Fisher syndrome, 76 with chronic inflammatory demyelinating polyneuropathy, and 59 with other types of chronic neuropathy. Biallelic RFC1 mutations were found in three patients with immune-mediated neuropathies, including Guillain-Barré syndrome, idiopathic sensory ataxic neuropathy, or anti-myelin-associated glycoprotein (MAG) neuropathy, who responded to immunotherapies. In addition, a patient with chronic sensory autonomic neuropathy had biallelic mutations, and subclinical changes in Schwann cells on nerve biopsy. In summary, we found CANVAS-related RFC1 mutations in patients with treatable immune-mediated neuropathy or demyelinating neuropathy.

    DOI: 10.1038/s41598-023-45011-8

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  • Hirano M, Kuwahara M, Yamagishi Y, Samukawa M, Fujii K, Yamashita S, Ando M, Oka N, Nagano M, Matsui T, Takeuchi T, Saigoh K, Kusunoki S, Takashima H, Nagai Y. .  CANVAS-related RFC1 mutations in patients with immune-mediated neuropathy .  Sci Rep13 ( 1 ) 17801   2023.10Reviewed

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    DOI: 10.1038/s41598-023-45011-8.

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  • Higuchi Y, Ando M, Kojima F, Yuan J, Hashiguchi A, Yoshimura A, Hiramatsu Y, Nozuma S, Fukumura S, Yahikozawa H, Abe E, Toyoshima I, Sugawara M, Okamoto Y, Matsuura E, Takashima H. .  Dystonia and Parkinsonism in COA7-related disorders: expanding the phenotypic spectrum .  J Neurol271 ( 1 ) 419 - 430   2023.9Reviewed

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  • Takei J, Higuchi Y, Ando M, Yoshimura A, Yuan JH, Fujisaki N, Tokashiki T, Kanzato N, Jonosono M, Sueyoshi T, Kanda N, Matsuoka H, Okubo R, Suehara M, Matsuura E, Takashima H. .  Microbleed clustering in thalamus sign in CADASIL patients with NOTCH3 R75P mutation. .  Front Neurol23 ( 14 ) 1241678 - 1241678   2023.8Reviewed

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    DOI: 10.3389/fneur.2023.1241678.

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  • Yuan JH, Cheng X, Matsuura E, Higuchi Y, Ando M, Hashiguchi A, Yoshimura A, Nakachi R, Mine J, Taketani T, Maeda K, Kawakami S, Kira R, Tanaka S, Kanai K, Dib-Hajj F, Dib-Hajj SD, Waxman SG, Takashima H. .  Genetic, electrophysiological, and pathological studies on patients with SCN9A-related pain disorders. .  J Peripher Nerv Syst28 ( 4 ) 597 - 607   2023.8Reviewed

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    DOI: 10.1111/jns.12590

  • Nagata R, Matsuura E, Nozuma S, Dozono M, Noguchi Y, Ando M, Hiramatsu Y, Kodama D, Tanaka M, Kubota R, Yamakuchi M, Higuchi Y, Sakiyama Y, Arata H, Higashi K, Hashiguchi T, Nakane S, Takashima H. .  Anti-ganglionic acetylcholine receptor antibodies in functional neurological symptom disorder/conversion disorder. Front Neurol .  Front Neurol13 ( 14 ) 1137958 - 1137958   2023.2Reviewed

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  • Yuan JH, Higuchi Y, Hashiguchi A, Ando M, Yoshimura A, Nakamura T, Hiramatsu Y, Sakiyama Y, Takashima H .  Gene panel analysis of 119 index patients with suspected periodic paralysis in Japan .  Front Neurol26 ( 14 ) 1078195 - 1078195   2023.1Reviewed

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    DOI: 10.1111/jns.12590

  • Takahashi N, Mishima T, Fujioka S, Izumi K, Ando M, Higuchi Y, Takashima H, Tsuboi Y. .  Siblings with Cockayne Syndrome B Type III Presenting with Slowly Progressive Cerebellar Ataxia. .  Intern Med62 ( 15 ) 2253 - 2259   2023Reviewed

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  • M.D. Imoto Makiko, M.D. Nakamura Kota, M.D. Inoue Kimiko, M.D. Ph.D. Ando Masahiro, M.D. Ph.D. Higuchi Yujiro, M.D. Ph.D. Takashima Hiroshi, M.D. Ph.D. Okuda Shiho .  Involvement of autonomic nervous system since middle age in elderly patient with giant axonal neuropathy caused by novel genetic mutation .  Rinsho Shinkeigaku63 ( 9 ) 566 - 571   2023Reviewed

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    Language:Japanese   Publisher:Societas Neurologica Japonica  

    <p>A 69-year-old man began to experience difficulty with walking at the age of 5 years and started use of a cane at around 13 years, then finally started using a wheelchair at 17 years old. A diagnosis of Charcot-Marie-Tooth disease was previously determined at another hospital, though neither peripheral nerve biopsy nor gene analysis was conducted. He visited our institution at the age of 54 years and irregular outpatient examinations were started, which indicated slowly progressive muscle weakness and sensory disturbance of the limbs, leading to a decline in activities of daily living. Gene analysis at 60 years old identified a novel homozygous missense mutation in the gigaxonin gene, c.1478A>C, p.E493A. Intellectual capacity was preserved and kinky hair was not present, though complications such as vocal cord paralysis, paralytic ileus, and dysarthria were noted starting at age 61. Based on these findings, the patient was diagnosed with a mild form of giant axonal neuropathy.</p>

    DOI: 10.5692/clinicalneurol.cn-001822

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  • Imoto M, Nakamura K, Inoue K, Ando M, Higuchi Y, Takashima H, Okuda S. .  [Involvement of autonomic nervous system since middle age in elderly patient with giant axonal neuropathy caused by novel genetic mutation]. .      2023

  • Imoto M., Nakamura K., Inoue K., Ando M., Higuchi Y., Takashima H., Okuda S. .  [Involvement of autonomic nervous system since middle age in elderly patient with giant axonal neuropathy caused by novel genetic mutation]. .      2023

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  • Ando M, Takashima H .  [Cerebellar Ataxia in RFC1 Spectrum Disorders]. .  Brain and nerve = Shinkei kenkyu no shinpo74 ( 11 ) 1273 - 1279   2022.11

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    Authorship:Lead author   Language:Japanese   Publisher:株式会社医学書院  

    DOI: 10.11477/mf.1416202227

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  • 安藤 匡宏, 高嶋 博 .  【RFC1遺伝子関連スペクトラム障害】RFC1遺伝子関連スペクトラム障害と小脳性運動失調 .  BRAIN and NERVE: 神経研究の進歩74 ( 11 ) 1273 - 1279   2022.11

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    <文献概要>RFC1遺伝子関連スペクトラム障害は小脳性運動失調や感覚ニューロパチー,前庭神経障害を含めた多彩な障害が単独ないし多様な組合せをもって出現し得る疾患である。臨床症状や画像所見から多系統萎縮症との鑑別にも重要な疾患となる。本論では小脳性運動失調症におけるRFC1遺伝子関連スペクトラム障害の頻度や遺伝学的特徴,画像所見について詳述する。

  • Miller TM, Cudkowicz ME, Genge A, Shaw PJ, Sobue G, Bucelli RC, Chiò A, Van Damme P, Ludolph AC, Glass JD, Andrews JA, Babu S, Benatar M, McDermott CJ, Cochrane T, Chary S, Chew S, Zhu H, Wu F, Nestorov I, Graham D, Sun P, McNeill M, Fanning L, Ferguson TA, Fradette S; VALOR and OLE Working Group. .  Trial of Antisense Oligonucleotide Tofersen for SOD1 ALS .  N Engl J Med.387 ( 12 ) 1099 - 1110   2022.9Reviewed International coauthorship

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    DOI: 10.1056/NEJMoa2204705

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  • Nomura E., Tadokoro K., Sasaki R., Nakata Y., Nakano Y., Yunoki T., Takemoto M., Morihara R., Ando M., Takashima H., Yamashita T. .  Japanese case of Charcot–Marie–Tooth disease type 2Z with severe retinitis pigmentosa .  Neurology and Clinical Neuroscience10 ( 5 ) 266 - 268   2022.9

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    Authorship:Lead author   Language:Japanese   Publisher:Neurology and Clinical Neuroscience  

    Charcot–Marie–Tooth disease type 2Z (CMT2Z) shows highly variable clinical features. We report the first Japanese CMT2Z patient with a c.754C>T (p.R252W) substitution of the MORC2 gene, complicating severe retinitis pigmentosa. The MORC2 mutants were involved in a decrease in cell survival through induction of apoptosis. Thus, the MORC2 mutation might be involved in the degeneration of photoreceptors and the development of retinitis pigmentosa.

    DOI: 10.1111/ncn3.12660

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  • 武 義人, 平松 有, 吉元 裕亮, 吉田 崇志, 田中 咲衣, 上山 未紗, 岩田 大輝, 今田 美南子, 高畑 克徳, 安藤 匡宏, 田代 雄一, 崎山 佑介, 荒田 仁, 松浦 英治, 高嶋 博 .  脾臓低形成がみられ、椎間板炎と脊髄硬膜外膿瘍、傍椎体膿瘍を合併した肺炎球菌性髄膜炎の1例 .  Journal of Japan Society of Neurological Emergencies & Critical Care34 ( 2 ) 21 - 25   2022.6

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    Authorship:Lead author   Language:Japanese   Publisher:(株)へるす出版  

    症例は62歳男性で、入院前日より頭痛が再燃し、両耳の難聴も出現したため当院に救急搬送された。症状および検査所見から細菌性髄膜炎と診断し、急性腎不全を考盧してセフトリアキソン、リネゾリドの点滴静注および4日間のデキサメタゾンの静注を開始した。入院12日目の髄液検査でいったん改善していた細胞数、蛋白が再上昇し、背部痛も悪化、CT画像で脾臓低形成がみられ、腎機能も改善したことから、抗菌薬をメロペネム、バンコマイシンへ変更した。入院16日目の画像では腰椎3/4間に椎間板炎の所見、28日目の画像では腰椎4/5間の椎間関節付近に脊髄硬膜外膿瘍と傍椎体膿瘍がみられた。バンコマイシンの投与が6週間となった入院54日目のところでアモキシシリンの内服に切り替え、変更後も症状の再燃はなく、髄液所見の悪化やMRI画像で膿瘍像の変化がないことを確認し、入院66日目に自宅退院となった。

  • Taniguchi T, Ando M, Okamoto Y, Yoshimura A, Higuchi Y, Hashiguchi A, Matsuda N, Yamamoto M, Dohi E, Takahashi M, Yoshino M, Nomura T, Matsushima M, Yabe I, Sanpei Y, Ishiura H, Mitsui J, Nakagawa M, Tsuji S, Takashima H .  Elderly patients with suspected Charcot-Marie-Tooth disease should be tested for the TTR gene for effective treatments .  J Hum Genet67 ( 6 ) 353 - 362   2022Reviewed

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    DOI: 10.1038/s10038-021-01005-w.

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  • Ando M, Higuchi Y, Takeuchi M, Hashiguchi A, Takashima H .  The first case of infantile-onset multisystem neurologic, endocrine, and pancreatic disease caused by novel PTRH2 mutation in Japan .  Neurol Sci43 ( 3 ) 2133 - 2136   2022Reviewed

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    DOI: 10.1007/s10072-021-05817-8

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  • Hiramatsu Y, Okamoto Y, Yoshimura A, Yuan JH, Ando M, Higuchi Y, Hashiguchi A, Matsuura E, Nozaki F, Kumada T, Murayama K, Suzuki M, Yamamoto Y, Matsui N, Miyazaki Y, Yamaguchi M, Suzuki Y, Mitsui J, Ishiura H, Tanaka M, Morishita S, Nishino I, Tsuji S, Takashima H .  Complex hereditary peripheral neuropathies caused by novel variants in mitochondrial-related nuclear genes .  J Neurol269 ( 8 ) 4129 - 4140   2022Reviewed

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    DOI: 10.1007/s00415-022-11026-w.

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  • Nozuma S, Matsuura E, Tashiro Y, Nagata R, Ando M, Hiramatsu Y, Higuchi Y, Sakiyama Y, Hashiguchi A, Michizono K, Higashi K, Matsuzaki T, Kodama D, Tanaka M, Yamano Y, Moritoyo T, Kubota R, Takashima H. .  Efficacy of L-Arginine treatment in patients with HTLV-1- associated neurological disease .  Ann Clin Transl Neurol10 ( 2 ) 237 - 245   2022Reviewed

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    DOI: 10.1002/acn3.51715.

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  • Yuan JH, Higuchi Y, Ando M, Matsuura E, Hashiguchi A, Yoshimura A, Nakamura T, Sakiyama Y, Mitsui J, Ishiura H, Tsuji S, Takashima H .  Multi-type RFC1 repeat expansions as the most common cause of hereditary sensory and autonomic neuropathy .  Front Neurol17 ( 13 ) 986504   2022Reviewed

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    DOI: 10.3389/fneur.2022.986504.

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  • Yuan JH, Higuchi Y, Hashiguchi A, Ando M, Yoshimura A, Nakamura T, Sakiyama Y, Takashima H. .  Genetic spectrum and founder effect of non-dystrophic myotonia: a Japanese case series study .  J Neurol269 ( 12 ) 6406 - 6415   2022Reviewed

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    DOI: 10.1007/s00415-022-11305-6.

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  • Taniguchi T, Ando M, Okamoto Y, Yoshimura A, Higuchi Y, Hashiguchi A, Shiga K, Hayashida A, Hatano T, Ishiura H, Mitsui J, Hattori N, Mizuno T, Nakagawa M, Tsuji S, Takashima H .  Genetic spectrum of Charcot-Marie-Tooth disease associated with myelin protein zero gene variants in Japan .  Clin Gene99 ( 3 ) 359 - 375   2021Reviewed

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  • Higuchi Y, Ando M, Yoshimura A, Hakotani S, Koba Y, Sakiyama Y, Hiramatsu Y, Tashiro Y, Maki Y, Hashiguchi A, Yuan J, Okamoto Y, Matsuura E, Takashima .  Prevalence of Fragile X-Associated Tremor/Ataxia Syndrome in Patients with Cerebellar Ataxia in Japan .  Cerebellum21 ( 5 ) 851 - 860   2021Reviewed

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  • 丸田恭子 安藤匡宏, 大友孝信, 高嶋 博 .  AP5Z1遺伝子に新規変異を認めたspastic paraplegia48の1例 .  Rinsho shinkeigaku = Clinical neurology60 ( 8 ) 543 - 548   2020Reviewed

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  • Yoshimura A, Yuan JH, Hashiguchi A, Ando M, Higuchi Y, Nakamura T, Okamoto Y, Nakagawa M, Takashima H .  Genetic profile and onset features of 1005 patients with Charcot-Marie-Tooth disease in Japan .  J Neurol Neurosurg Psychiatry90 ( 2 ) 195 - 202   2019Reviewed

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    DOI: 10.1136/jnnp-2018-318839

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  • Yuan JH, Hashiguchi A, Okamoto Y, Yoshimura A, Ando M, Shiomi K, Saito K, Takahashi M, Ichinose K, Ohmichi T, Ichikawa K, Tadashi A, Takigawa H, Shibayama H, Takashima H .  Clinical and mutational spectrum of Japanese patients with recessive variants in SH3TC2 .  J Hum Genet63 ( 31 ) 281 - 287   2018Reviewed

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    DOI: 10.1038/s10038-017-0388-5

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  • Sakiyama Y, Matsuura E, Maki Y, Yoshimura A, Ando M, Nomura M, Shinohara K, Saigo R, Nakamura T, Hashiguchi A, Takashima H .  Peripheral neuropathy in a case with CADASIL: a case report .  BMC Neurol18 ( 1 ) 134   2018Reviewed

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    DOI: 10.1186/s12883-018-1131-3

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  • Yuan JH, Sakiyama Y, Hashiguchi A, Ando M, Okamoto Y, Yoshimura A, Higuchi Y, Takashima H .  Genetic and phenotypic profile of 112 patients with X-linked Charcot-Marie-Tooth disease type 1 .  Eur J Neurol25 ( 12 ) 1454 - 1461   2018Reviewed

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    DOI: 10.1111/ene.13750

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  • Higuchi Y, Okunushi R, Hara T, Hashiguchi A, Yuan J, Yoshimura A, Murayama K, Ohtake A, Ando M, Hiramatsu Y, Ishihara S, Tanabe H, Okamoto Y, Matsuura E, Ueda T, Toda T, Yamashita S, Yamada K, Koide T, Yaguchi H, Mitsui J, Ishiura H, Yoshimura J, Doi K, Morishita S, Sato K, Nakagawa M, Yamaguchi M, Tsuji S, Takashima .  Mutations in COA7 cause spinocerebellar ataxia with axonal neuropathy .  Brain141 ( 6 ) 1622 - 1636   2018Reviewed

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    DOI: 10.1093/brain/awy104

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  • Yuan JH, Hashiguchi A, Yoshimura A, Sakai N, Takahashi MP, Ueda T, Taniguchi A, Okamoto S, Kanazawa N, Yamamoto Y, Saigoh K, Kusunoki S, Ando M, Hiramatsu Y, Okamoto Y, Takashima H .  WNK1/HSN2 founder mutation in patients with hereditary sensory and autonomic neuropathy: A Japanese cohort study. .  Clin Genet92 ( 6 ) 659 - 663   2017Reviewed

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    DOI: 10.1111/cge.13037

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  • Yoshimura A, Yuan JH, Hashiguchi A, Hiramatsu Y, Ando M, Higuchi Y, Nakamura T, Okamoto Y, Matsumura K, Hamano T, Sawaura N, Shimatani Y, Kumada S, Okumura Y, Miyahara J, Yamaguchi Y, Kitamura S, Haginoya K, Mitsui J, Ishiura H, Tsuji S, Takashima H .  Clinical and mutational spectrum of Japanese patients with Charcot-Marie-Tooth disease caused by GDAP1 variants .  Clin Genet92 ( 3 ) 274 - 280   2017Reviewed

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    DOI: 10.1111/cge.13002

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  • Yuan JH, Hashiguchi A, Yoshimura A, Yaguchi H, Tsuzaki K, Ikeda A, Wada-Isoe K, Ando M, Nakamura T, Higuchi Y, Hiramatsu Y, Okamoto Y, Takashima H. .  Clinical diversity caused by novel IGHMBP2 variants. .  J Hum Genet62 ( 6 ) 599 - 604   2017Reviewed

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    DOI: 10.1038/jhg.2017.15

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  • Yuan J, Ando M, Higuchi I, Sakiyama Y, Matsuura E, Michizono K, Watanabe O, Nagano S, Inamori Y, Hashiguchi A, Higuchi Y, Yoshimura A, Takashima H .  Partial deficiency of emerin caused by a splice site mutation in EMD .  Intern Med53 ( 14 ) 1563 - 1568   2014Reviewed

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    DOI: 10.2169/internalmedicine.53.8922

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MISC

  • Clinical Topics 末梢神経障害 遺伝性ニューロパチーにおけるリピート伸長異常

    安藤 匡宏, 高嶋 博

    Annual Review神経   2025   281 - 287   2025.4

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  • 【RFC1遺伝子関連スペクトラム障害】RFC1遺伝子関連スペクトラム障害と小脳性運動失調

    安藤 匡宏, 高嶋 博

    BRAIN and NERVE: 神経研究の進歩   74 ( 11 )   1273 - 1279   2022.11

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    <文献概要>RFC1遺伝子関連スペクトラム障害は小脳性運動失調や感覚ニューロパチー,前庭神経障害を含めた多彩な障害が単独ないし多様な組合せをもって出現し得る疾患である。臨床症状や画像所見から多系統萎縮症との鑑別にも重要な疾患となる。本論では小脳性運動失調症におけるRFC1遺伝子関連スペクトラム障害の頻度や遺伝学的特徴,画像所見について詳述する。

Research Projects

  • 遺伝性末梢神経障害における新規病因解明と治療戦略の構築

    2026.4

    科学研究費補助金 基盤研究(C) 

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    Authorship:Principal investigator 

  • 遺伝性ニューロパチーの分子疫学的研究-新規原因遺伝子探索とリピート異常伸張

    Grant number:23K06931  2023.4 - 2026.3

    科学研究費補助金 基盤研究(C) 

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    Authorship:Principal investigator 

  • Molecular genetic research with a view to treating Charcot-Marie-Tooth disease

    Grant number:21H02842  2021.4 - 2024.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Takashima Hiroshi

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    Grant amount:\17290000 ( Direct Cost: \13300000 、 Indirect Cost:\3990000 )

    We investigated the expansion of GGC repeats in the RFC1 gene, which is the cause of CANVAS, and the expansion of pentanucleotide repeats in the NOTCH2NLC gene, which is the cause of neuronal intranuclear inclusion disease (NIID), in patients with hereditary peripheral neuropathy. We found repeat expansions in NOTCH2NLC in 23 cases and RFC1 in 18 cases out of 2,780 patients with hereditary neuropathy, and also found that many cases of both diseases showed only peripheral neuropathy. We summarized these results in four papers, including JNNP and Front Neurol. Furthermore, we discovered and reported four genes that cause new mitochondrial-related hereditary neuropathy in patients with neuropathy (J Neurol 2022).

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  • R言語を用いた次世代シークエンサーの網羅的解析パイプラインの構築

    Grant number:21K15702  2021.4 - 2023.3

    科学研究費補助金 若手研究 

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    Authorship:Principal investigator