Updated on 2025/11/10

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写真a

 
Haruko Nakamura
 
Organization
Graduate School of Medicine Department of Medicine Neurology and Stroke Medicine Assistant Professor
School of Medicine Medical Course
Title
Assistant Professor
External link

Degree

  • 博士(医学) ( 2017.3   横浜市立大学 )

Research Interests

  • 神経変性疾患

Research Areas

  • Life Science / Neurology  / 神経変性疾患

Papers

  • A case report of an individual with Creutzfeldt-Jakob disease characterized by prolonged isolated thalamic lesions and rare MM2-cortical-type pathology. International journal

    Misako Kunii, Hitaru Kishida, Mikiko Tada, Mitsuo Okamoto, Keiichiro Asano, Haruko Nakamura, Keita Takahashi, Shunta Hashiguchi, Shun Kubota, Masaki Okubo, Hideyuki Takeuchi, Naohisa Ueda, Katsuya Satoh, Tetsuyuki Kitamoto, Hiroshi Doi, Fumiaki Tanaka

    BMC neurology   24 ( 1 )   456 - 456   2024.11

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    Language:English   Publishing type:Research paper (scientific journal)  

    BACKGROUND: Diffusion-weighted magnetic resonance imaging (DWI) is essential for diagnosing Creutzfeldt-Jakob disease (CJD). Thalamic lesions are rarely detected by DWI in sporadic CJD (sCJD) cases with methionine homozygosity at polymorphic codon 129 (129MM) of the prion protein (PrP) gene. Here, we describe an unusual sCJD case, characterized by prolonged isolated thalamic diffusion hyperintensities and atypical brain pathology, in combination with the 129MM genotype. CASE PRESENTATION: A 72-year-old Japanese man developed a mild unsteady gait that had persisted for 1 year. DWI revealed isolated thalamic diffusion hyperintensities. Over the following 4 years, his condition progressed to include ataxia and cognitive decline. Repeated cerebrospinal fluid tests were negative for 14-3-3 protein, total tau protein, and real-time quaking-induced conversion assay. Electroencephalography did not show periodic sharp wave complexes or generalized periodic discharges. Despite these findings, thalamic DWI abnormalities persisted and evolved to include cortical lesions in the later stage of the disease. Genetic testing confirmed a 129MM genotype with no pathogenic PrP gene variants. Brain autopsy identified type 2 pathogenic PrP and the absence of the M2-thalamic prion strain, suggesting an MM2-cortical (MM2C)-subtype of sCJD. Histopathology revealed small vacuoles (sv) and patchy-perivacuolar PrP deposits without large vacuoles (lv). Patchy-perivacuolar deposits are a characteristic feature of the MM2C (lv) subtype and indicate MM2C (lv) pathology. Thus, this case was classified as a rare MM2C (sv + lv) subtype. No PrP protein staining was observed in the thalamus, despite spongiform changes with small vacuoles. CONCLUSIONS: This case underscores the diagnostic challenges of atypical CJD with isolated thalamic abnormalities on DWI. Despite negative cerebrospinal fluid findings and clinical diagnostic criteria, persistent DWI abnormalities and evolving clinical symptoms continued to raise suspicion of CJD. A definitive diagnosis, being the MM2C (sv + lv) subtype of sCJD, was confirmed upon pathological examination. Even when atypical findings, such as isolated thalamic abnormalities, are observed and various tests are negative, if suspicion of CJD cannot be ruled out, it is important to confirm the diagnosis and pathological subtypes via postmortem analysis.

    DOI: 10.1186/s12883-024-03958-9

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  • 全身炎症に伴うCCR2陽性マクロファージの中枢神経浸潤がALS病態を促進する

    小笠原 陽大, 竹内 英之, 古宮 裕泰, 小川 有紀, 池田 拓也, 高橋 慶太, 大久保 正紀, 橋口 俊太, 中村 治子, 土井 宏, 田中 章景

    神経免疫学   29 ( 1 )   253 - 253   2024.10

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    Language:Japanese   Publisher:(一社)日本神経免疫学会  

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  • 髄液LOTUS濃度を用いた多発性硬化症の病勢把握

    中澤 謙介, 高橋 慶太, 池田 拓也, 古宮 裕泰, 窪田 瞬, 橋口 俊太, 中村 治子, 田中 健一, 土井 宏, 竹内 英之, 田中 章景

    臨床神経学   64 ( Suppl. )   S331 - S331   2024.10

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    Language:Japanese   Publisher:(一社)日本神経学会  

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  • Hereditary spastic paraplegia and extensive leukoencephalopathy: a case report of a unique phenotype associated with a GJB1/Cx32 p.Pro174Ser variant. Reviewed International journal

    Haruko Nakamura, Hiroshi Doi, Yosuke Miyaji, Taishi Wada, Erisa Takahashi, Mikiko Tada, Hiromi Fukuda, Atsushi Fujita, Yuichi Higashiyama, Yuri Nagao, Kazue Kimura, Masaharu Hayashi, Kyoko Hoshino, Naomichi Matsumoto, Fumiaki Tanaka

    BMC neurology   24 ( 1 )   310 - 310   2024.9

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    BACKGROUND: Pathogenic variants in Gap junction protein beta 1 (GJB1), which encodes Connexin 32, are known to cause X-linked Charcot-Marie-Tooth disease (CMTX), the second most common form of CMT. CMTX presents with the following five central nervous systems (CNS) phenotypes: subclinical electrophysiological abnormalities, mild fixed abnormalities on neurological examination and/or imaging, transient CNS dysfunction, cognitive impairment, and persistent CNS manifestations. CASE PRESENTATION: A 40-year-old Japanese male showed CNS symptoms, including nystagmus, prominent spastic paraplegia, and mild cerebellar ataxia, accompanied by subclinical peripheral neuropathy. Brain magnetic resonance imaging revealed hyperintensities in diffusion-weighted images of the white matter, particularly along the pyramidal tract, which had persisted since childhood. Nerve conduction assessment showed a mild decrease in motor conduction velocity, and auditory brainstem responses beyond wave II were absent. Peripheral and central conduction times in somatosensory evoked potentials elicited by stimulation of the median nerve were prolonged. Genetic analysis identified a hemizygous GJB1 variant, NM_000166.6:c.520C > T p.Pro174Ser. CONCLUSIONS: The patient in the case described here, with a GJB1 p.Pro174Ser variant, presented with a unique CNS-dominant phenotype, characterized by spastic paraplegia and persistent extensive leukoencephalopathy, rather than CMTX. Similar phenotypes have also been observed in patients with GJC2 and CLCN2 variants, likely because of the common function of these genes in regulating ion and water balance, which is essential for maintaining white matter function. CMTX should be considered within the spectrum of GJB1-related disorders, which can include patients with predominant CNS symptoms, some of which can potentially be classified as a new type of spastic paraplegia.

    DOI: 10.1186/s12883-024-03823-9

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  • Large-scale animal model study uncovers altered brain pH and lactate levels as a transdiagnostic endophenotype of neuropsychiatric disorders involving cognitive impairment Reviewed

    Hideo Hagihara, Hirotaka Shoji, Satoko Hattori, Giovanni Sala, Yoshihiro Takamiya, Mika Tanaka, Masafumi Ihara, Mihiro Shibutani, Izuho Hatada, Kei Hori, Mikio Hoshino, Akito Nakao, Yasuo Mori, Shigeo Okabe, Masayuki Matsushita, Anja Urbach, Yuta Katayama, Akinobu Matsumoto, Keiichi I Nakayama, Shota Katori, Takuya Sato, Takuji Iwasato, Haruko Nakamura, Yoshio Goshima, Matthieu Raveau, Tetsuya Tatsukawa, Kazuhiro Yamakawa, Noriko Takahashi, Haruo Kasai, Johji Inazawa, Ikuo Nobuhisa, Tetsushi Kagawa, Tetsuya Taga, Mohamed Darwish, Hirofumi Nishizono, Keizo Takao, Kiran Sapkota, Kazutoshi Nakazawa, Tsuyoshi Takagi, Haruki Fujisawa, Yoshihisa Sugimura, Kyosuke Yamanishi, Lakshmi Rajagopal, Nanette Deneen Hannah, Herbert Y Meltzer, Tohru Yamamoto, Shuji Wakatsuki, Toshiyuki Araki, Katsuhiko Tabuchi, Tadahiro Numakawa, Hiroshi Kunugi, Freesia L Huang, Atsuko Hayata-Takano, Hitoshi Hashimoto, Kota Tamada, Toru Takumi, Takaoki Kasahara, Tadafumi Kato, Isabella A Graef, Gerald R Crabtree, Nozomi Asaoka, Hikari Hatakama, Shuji Kaneko, Takao Kohno, Mitsuharu Hattori, Yoshio Hoshiba, Ryuhei Miyake, Kisho Obi-Nagata, Akiko Hayashi-Takagi, Léa J Becker, Ipek Yalcin, Yoko Hagino, Hiroko Kotajima-Murakami, Yuki Moriya, Kazutaka Ikeda, Hyopil Kim, Bong-Kiun Kaang, Hikari Otabi, Yuta Yoshida, Atsushi Toyoda, Noboru H Komiyama, Seth GN Grant, Michiru Ida-Eto, Masaaki Narita, Ken-ichi Matsumoto, Emiko Okuda-Ashitaka, Iori Ohmori, Tadayuki Shimada, Kanato Yamagata, Hiroshi Ageta, Kunihiro Tsuchida, Kaoru Inokuchi, Takayuki Sassa, Akio Kihara, Motoaki Fukasawa, Nobuteru Usuda, Tayo Katano, Teruyuki Tanaka, Yoshihiro Yoshihara, Michihiro Igarashi, Takashi Hayashi, Kaori Ishikawa, Satoshi Yamamoto, Naoya Nishimura, Kazuto Nakada, Shinji Hirotsune, Kiyoshi Egawa, Kazuma Higashisaka, Yasuo Tsutsumi, Shoko Nishihara, Noriyuki Sugo, Takeshi Yagi, Naoto Ueno, Tomomi Yamamoto, Yoshihiro Kubo, Rie Ohashi, Nobuyuki Shiina, Kimiko Shimizu, Sayaka Higo-Yamamoto, Katsutaka Oishi, Hisashi Mori, Tamio Furuse, Masaru Tamura, Hisashi Shirakawa, Daiki X Sato, Yukiko U Inoue, Takayoshi Inoue, Yuriko Komine, Tetsuo Yamamori, Kenji Sakimura, Tsuyoshi Miyakawa

    eLife   12   2024.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:eLife Sciences Publications, Ltd  

    Increased levels of lactate, an end-product of glycolysis, have been proposed as a potential surrogate marker for metabolic changes during neuronal excitation. These changes in lactate levels can result in decreased brain pH, which has been implicated in patients with various neuropsychiatric disorders. We previously demonstrated that such alterations are commonly observed in five mouse models of schizophrenia, bipolar disorder, and autism, suggesting a shared endophenotype among these disorders rather than mere artifacts due to medications or agonal state. However, there is still limited research on this phenomenon in animal models, leaving its generality across other disease animal models uncertain. Moreover, the association between changes in brain lactate levels and specific behavioral abnormalities remains unclear. To address these gaps, the International Brain pH Project Consortium investigated brain pH and lactate levels in 109 strains/conditions of 2294 animals with genetic and other experimental manipulations relevant to neuropsychiatric disorders. Systematic analysis revealed that decreased brain pH and increased lactate levels were common features observed in multiple models of depression, epilepsy, Alzheimer’s disease, and some additional schizophrenia models. While certain autism models also exhibited decreased pH and increased lactate levels, others showed the opposite pattern, potentially reflecting subpopulations within the autism spectrum. Furthermore, utilizing large-scale behavioral test battery, a multivariate cross-validated prediction analysis demonstrated that poor working memory performance was predominantly associated with increased brain lactate levels. Importantly, this association was confirmed in an independent cohort of animal models. Collectively, these findings suggest that altered brain pH and lactate levels, which could be attributed to dysregulated excitation/inhibition balance, may serve as transdiagnostic endophenotypes of debilitating neuropsychiatric disorders characterized by cognitive impairment, irrespective of their beneficial or detrimental nature.

    DOI: 10.7554/elife.89376

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    Other Link: https://cdn.elifesciences.org/articles/89376/elife-89376-v1.xml

  • Identification of small molecule inhibitors of G3BP-driven stress granule formation Reviewed

    Brian D. Freibaum, James Messing, Haruko Nakamura, Ugur Yurtsever, Jinjun Wu, Hong Joo Kim, Jeff Hixon, Rene Marc Lemieux, Jay Duffner, Walter Huynh, Kathy Wong, Michael White, Christina Lee, Rachel E. Meyers, Roy Parker, J. Paul Taylor

    Journal of Cell Biology   223 ( 3 )   2024.1

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    Publishing type:Research paper (scientific journal)   Publisher:Rockefeller University Press  

    Stress granule formation is triggered by the release of mRNAs from polysomes and is promoted by the action of the RNA-binding proteins G3BP1/2. Stress granules have been implicated in several disease states, including cancer and neurodegeneration. Consequently, compounds that limit stress granule formation or promote their dissolution have potential as both experimental tools and novel therapeutics. Herein, we describe two small molecules, G3BP inhibitor a and b (G3Ia and G3Ib), designed to bind to a specific pocket in G3BP1/2 that is targeted by viral inhibitors of G3BP1/2 function. In addition to disrupting the co-condensation of RNA, G3BP1, and caprin 1 in vitro, these compounds inhibit stress granule formation in cells treated prior to or concurrent with stress and dissolve pre-existing stress granules. These effects are consistent across multiple cell types and a variety of initiating stressors. Thus, these compounds represent powerful tools to probe the biology of stress granules and hold promise for therapeutic interventions designed to modulate stress granule formation.

    DOI: 10.1083/jcb.202308083

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  • RNA foci in two bi-allelic RFC1 expansion carriers. International journal

    Taishi Wada, Hiroshi Doi, Masaki Okubo, Mikiko Tada, Naohisa Ueda, Hidefumi Suzuki, Wakana Tominaga, Haruki Koike, Hiroyasu Komiya, Shun Kubota, Shunta Hashiguchi, Haruko Nakamura, Keita Takahashi, Misako Kunii, Kenichi Tanaka, Yosuke Miyaji, Yuichi Higashiyama, Eriko Koshimizu, Satoko Miyatake, Masahisa Katsuno, Satoshi Fujii, Hidehisa Takahashi, Naomichi Matsumoto, Hideyuki Takeuchi, Fumiaki Tanaka

    Annals of neurology   2023.12

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    Cerebellar ataxia, neuropathy, vestibular areflexia syndrome (CANVAS) is a late-onset, autosomal recessive neurodegenerative disorder caused by biallelic AAGGG/ACAGG repeat expansion (AAGGG-exp/ACAGG-exp) in RFC1. The recent identification of patients with CANVAS exhibiting compound heterozygosity for AAGGG-exp and truncating variants supports the loss-of-function of RFC1 in CANVAS patients. We investigated the pathological changes in two autopsied patients with CANVAS harboring biallelic ACAGG-exp and AAGGG-exp. RNA fluorescence in situ hybridization of the two patients revealed CCTGT- and CCCTT-containing RNA foci, respectively, in neuronal nuclei of tissues with neuronal loss. Our findings suggest that RNA toxicity may be involved in the pathogenesis of CANVAS. This article is protected by copyright. All rights reserved.

    DOI: 10.1002/ana.26848

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  • A murine model of hnRNPH2-related neurodevelopmental disorder reveals a mechanism for genetic compensation by Hnrnph1 Reviewed

    Ane Korff, Xiaojing Yang, Kevin O’Donovan, Abner Gonzalez, Brett J.W. Teubner, Haruko Nakamura, James Messing, Fen Yang, Alexandre F. Carisey, Yong-Dong Wang, Tushar Patni, Heather Sheppard, Stanislav S. Zakharenko, Yuh Min Chook, J. Paul Taylor, Hong Joo Kim

    Journal of Clinical Investigation   133 ( 14 )   2023.7

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    DOI: 10.1172/jci160309

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  • CRMP1のリン酸化阻害は筋萎縮性側索硬化症モデルマウスの生存期間,運動機能の改善をもたらす

    浅野 徹也, 中村 治子, 川本 裕子, 木村 弥生, 高野 洋志, 八尾 良司, 橋口 俊太, 高橋 慶太, 田中 健一, 五嶋 良郎, 中村 史雄, 竹内 英之, 土井 宏, 田中 章景

    神経治療学   39 ( 6 )   S255 - S255   2022.10

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    Language:Japanese   Publisher:(一社)日本神経治療学会  

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  • Phosphorylated CRMP1, axon guidance protein, is a component of spheroids and is involved in axonal pathology in amyotrophic lateral sclerosis

    Yuko Kawamoto, Mikiko Tada, Tetsuya Asano, Haruko Nakamura, Aoi Jitsuki-Takahashi, Hiroko Makihara, Shun Kubota, Shunta Hashiguchi, Misako Kunii, Toshio Ohshima, Yoshio Goshima, Hideyuki Takeuchi, Hiroshi Doi, Fumio Nakamura, Fumiaki Tanaka

    Frontiers in Neurology   13   2022.9

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    In amyotrophic lateral sclerosis (ALS), neurodegeneration is characterized by distal axonopathy that begins at the distal axons, including the neuromuscular junctions, and progresses proximally in a “dying back” manner prior to the degeneration of cell bodies. However, the molecular mechanism for distal axonopathy in ALS has not been fully addressed. Semaphorin 3A (Sema3A), a repulsive axon guidance molecule that phosphorylates collapsin response mediator proteins (CRMPs), is known to be highly expressed in Schwann cells near distal axons in a mouse model of ALS. To clarify the involvement of Sema3A–CRMP signaling in the axonal pathogenesis of ALS, we investigated the expression of phosphorylated CRMP1 (pCRMP1) in the spinal cords of 35 patients with sporadic ALS and seven disease controls. In ALS patients, we found that pCRMP1 accumulated in the proximal axons and co-localized with phosphorylated neurofilaments (pNFs), which are a major protein constituent of spheroids. Interestingly, the pCRMP1:pNF ratio of the fluorescence signal in spheroid immunostaining was inversely correlated with disease duration in 18 evaluable ALS patients, indicating that the accumulation of pCRMP1 may precede that of pNFs in spheroids or promote ALS progression. In addition, overexpression of a phospho-mimicking CRMP1 mutant inhibited axonal outgrowth in Neuro2A cells. Taken together, these results indicate that pCRMP1 may be involved in the pathogenesis of axonopathy in ALS, leading to spheroid formation through the proximal progression of axonopathy.

    DOI: 10.3389/fneur.2022.994676

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  • Inhibition of Crmp1 phosphorylation at Ser522 ameliorates motor function and neuronal pathology in amyotrophic lateral sclerosis model mice. International journal

    Tetsuya Asano, Haruko Nakamura, Yuko Kawamoto, Mikiko Tada, Yayoi Kimura, Hiroshi Takano, Ryoji Yao, Hiroya Saito, Takuya Ikeda, Hiroyasu Komiya, Shun Kubota, Shunta Hashiguchi, Keita Takahashi, Misako Kunii, Kenichi Tanaka, Yoshio Goshima, Fumio Nakamura, Hideyuki Takeuchi, Hiroshi Doi, Fumiaki Tanaka

    eNeuro   9 ( 3 )   2022.5

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    Amyotrophic lateral sclerosis (ALS) is a rapidly progressive and fatal neurodegenerative disorder that affects upper and lower motor neurons; however, its pathomechanism has not been fully elucidated. Using a comprehensive phosphoproteomic approach, we have identified elevated phosphorylation of collapsin response mediator protein 1 (Crmp1) at serine 522 in the lumbar spinal cord of ALS model mice overexpressing a human superoxide dismutase mutant (SOD1G93A). We investigated the effects of Crmp1 phosphorylation and depletion in SOD1G93A mice using Crmp1S522A (Ser522→Ala) knockin (Crmp1ki/ki ) mice in which the S522 phosphorylation site was abolished and Crmp1 knockout (Crmp1 -/-) mice, respectively. Crmp1ki/ki/SOD1G93A mice showed longer latency to fall in a rotarod test while Crmp1-/-/SOD1G93A mice showed shorter latency compared with SOD1G93A mice. Survival was prolonged in Crmp1ki/ki/SOD1G93A mice but not in Crmp1-/-/SOD1G93A mice. In agreement with these phenotypic findings, residual motor neurons and innervated neuromuscular junctions were comparatively well-preserved in Crmp1ki/ki/SOD1G93A mice without affecting microglial and astroglial pathology. Pathway analysis of proteome alterations showed that the sirtuin signaling pathway had opposite effects in Crmp1ki/ki/SOD1G93A and Crmp1-/-/SOD1G93A mice. Our study indicates that modifying CRMP1 phosphorylation is a potential therapeutic strategy for ALS.Significance StatementCollapsin response mediator protein 1 (CRMP1) is an intracellular molecule that mediates semaphorin 3A (Sema3A) signaling. Phosphoproteomic analysis showed that the Semaphorin Neuronal Repulsive Signaling Pathway, which includes Crmp1 phosphorylation at Ser522, is upregulated in SOD1G93A mice that serve as a model of amyotrophic lateral sclerosis (ALS). While deleting both copies of the Crmp1 gene (Crmp1-/- ) leads to deterioration of motor function in SOD1G93A mice, phospho-null Crmp1 (Crmp1ki/ki ) improves motor function while preventing motor neuron loss and denervation of neuromuscular junctions. Among the Sema3A-mediated axon guidance pathways, we propose that CRMP1 phosphorylation is a potential therapeutic target for ALS.

    DOI: 10.1523/ENEURO.0133-22.2022

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  • Clinical evidence that a dysregulated master neural network modulator may aid in diagnosing schizophrenia

    Munetaka Nomoto, Glenn T. Konopaske, Naoya Yamashita, Reina Aoki, Aoi Jitsuki-Takahashi, Haruko Nakamura, Hiroko Makihara, Mari Saito, Yusuke Saigusa, Fumio Nakamura, Keisuke Watanabe, Toshihiko Baba, Francine M. Benes, Brian T. D. Tobe, Cameron D. Pernia, Joseph T. Coyle, Richard L. Sidman, Yoshio Hirayasu, Evan Y. Snyder, Yoshio Goshima

    Proceedings of the National Academy of Sciences   118 ( 31 )   2021.7

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    Publishing type:Research paper (scientific journal)   Publisher:Proceedings of the National Academy of Sciences  

    Significance

    There are no biomarkers for schizophrenia (SCZ), a disorder of dysfunctional neural networks. We demonstrate that a master regulator of cytoskeleton (“CRMP2”) and, hence, neural circuitry, may form the basis for such a biomarker because its activity is uniquely imbalanced in SCZ patients. We show that SCZ patients are characterized by an excess of active CRMP2 not only in their brains (where it is correlated with dendritic abnormalities) but also in their peripheral blood lymphocytes. The abundance of active CRMP2 and insufficiency of opposing inactive p-CRMP2 likely disrupts neuronal function. Because peripheral blood CRMP2 appears to reflect intracerebral processes, it could form the basis of a rapid, minimally invasive, sensitive, and specific clinical diagnostic aid for SCZ in young patients.

    DOI: 10.1073/pnas.2100032118

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    Other Link: https://pnas.org/doi/pdf/10.1073/pnas.2100032118

  • Ubiquitination is essential for recovery of cellular activities after heat shock

    Brian A. Maxwell, Youngdae Gwon, Ashutosh Mishra, Junmin Peng, Haruko Nakamura, Ke Zhang, Hong Joo Kim, J. Paul Taylor

    Science   372 ( 6549 )   2021.6

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    Publishing type:Research paper (scientific journal)   Publisher:American Association for the Advancement of Science (AAAS)  

    Tailoring stress responses

    When faced with environmental stress, cells respond by shutting down cellular processes such as translation and nucleocytoplasmic transport. At the same time, cells preserve cytoplasmic messenger RNAs in structures known as stress granules, and many cellular proteins are modified by the covalent addition of ubiquitin, which has long been presumed to reflect degradation of stress-damaged proteins (see the Perspective by Dormann). Maxwell et al. show that cells generate distinct patterns of ubiquitination in response to different stressors. Rather than reflecting the degradation of stress-damaged proteins, this ubiquitination primes cells to dismantle stress granules and reinitiate normal cellular activities once the stress is removed. Gwon et al. show that persistent stress granules are degraded by autophagy, whereas short-lived granules undergo a process of disassembly that is autophagy independent. The mechanism of this disassembly depends on the initiating stress.

    Science , abc3593 and abf6548, this issue p. eabc3593 and p. eabf6548 ; see also abj2400, p. 1393

    DOI: 10.1126/science.abc3593

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  • SGTA associates with intracellular aggregates in neurodegenerative diseases. International journal

    Shun Kubota, Hiroshi Doi, Shigeru Koyano, Kenichi Tanaka, Hiroyasu Komiya, Atsuko Katsumoto, Shingo Ikeda, Shunta Hashiguchi, Haruko Nakamura, Ryoko Fukai, Keita Takahashi, Misako Kunii, Mikiko Tada, Hideyuki Takeuchi, Fumiaki Tanaka

    Molecular brain   14 ( 1 )   59 - 59   2021.3

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    Intracellular aggregates are a common pathological hallmark of neurodegenerative diseases such as polyglutamine (polyQ) diseases, amyotrophic lateral sclerosis (ALS), Parkinson's disease (PD), and multiple system atrophy (MSA). Aggregates are mainly formed by aberrant disease-specific proteins and are accompanied by accumulation of other aggregate-interacting proteins. Although aggregate-interacting proteins have been considered to modulate the formation of aggregates and to be involved in molecular mechanisms of disease progression, the components of aggregate-interacting proteins remain unknown. In this study, we showed that small glutamine-rich tetratricopeptide repeat-containing protein alfa (SGTA) is an aggregate-interacting protein in neurodegenerative diseases. Immunohistochemistry showed that SGTA interacted with intracellular aggregates in Huntington disease (HD) cell models and neurons of HD model mice. We also revealed that SGTA colocalized with intracellular aggregates in postmortem brains of patients with polyQ diseases including spinocerebellar ataxia (SCA)1, SCA2, SCA3, and dentatorubral-pallidoluysian atrophy. In addition, SGTA colocalized with glial cytoplasmic inclusions in the brains of MSA patients, whereas no accumulation of SGTA was observed in neurons of PD and ALS patients. In vitro study showed that SGTA bound to polyQ aggregates through its C-terminal domain and SGTA overexpression reduced intracellular aggregates. These results suggest that SGTA may play a role in the formation of aggregates and may act as potential modifier of molecular pathological mechanisms of polyQ diseases and MSA.

    DOI: 10.1186/s13041-021-00770-1

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  • Two distinct mechanisms of neuropathy in immunoglobulin light chain (AL) amyloidosis

    Haruki Koike, Naohiro Mouri, Yuki Fukami, Masahiro Iijima, Koji Matsuo, Nobuyasu Yagi, Asami Saito, Haruko Nakamura, Keita Takahashi, Yoshiharu Nakae, Yohei Okada, Fumiaki Tanaka, Gen Sobue, Masahisa Katsuno

    Journal of the Neurological Sciences   421   117305 - 117305   2021.2

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    Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.jns.2020.117305

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  • Case Report: Anti-MOG Antibody Seroconversion Accompanied by Dimethyl Fumarate Treatment. International journal

    Keita Takahashi, Hideyuki Takeuchi, Ryoko Fukai, Haruko Nakamura, Keisuke Morihara, Yuichi Higashiyama, Toshiyuki Takahashi, Hiroshi Doi, Fumiaki Tanaka

    Frontiers in immunology   12   625465 - 625465   2021

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    Here we report three cases of anti-myelin oligodendrocyte glycoprotein (MOG) antibody-associated disease (MOGAD) mimicking multiple sclerosis in which seropositivity for anti-MOG antibodies occurred during disease-modifying drug dimethyl fumarate (DMF) treatment. These patients developed relapses with anti-MOG antibody seroconversion after switching from fingolimod or steroid pulse therapy to DMF, which was associated with peripheral lymphocyte recovery. MOGAD is considered a humoral immune disease, and DMF reportedly enhances Th2-skewed humoral immune activity. Therefore, we suggest that DMF, but not fingolimod, may exacerbate humoral immune imbalance and enhance autoantibody production, leading to aggravation of MOGAD.

    DOI: 10.3389/fimmu.2021.625465

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  • Proteomic analysis of exosome-enriched fractions derived from cerebrospinal fluid of amyotrophic lateral sclerosis patients

    Noriko Hayashi, Hiroshi Doi, Yoichi Kurata, Hiroyuki Kagawa, Yoshitoshi Atobe, Kengo Funakoshi, Mikiko Tada, Atsuko Katsumoto, Kenichi Tanaka, Misako Kunii, Haruko Nakamura, Keita Takahashi, Hideyuki Takeuchi, Shigeru Koyano, Yayoi Kimura, Hisashi Hirano, Fumiaki Tanaka

    Neuroscience Research   160   43 - 49   2020.11

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    Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.neures.2019.10.010

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  • De novo CACNA1G variants in developmental delay and early-onset epileptic encephalopathies. Reviewed International journal

    Misako Kunii, Hiroshi Doi, Shunta Hashiguchi, Toyojiro Matsuishi, Yasunari Sakai, Mizue Iai, Masaki Okubo, Haruko Nakamura, Keita Takahashi, Atsuko Katsumoto, Mikiko Tada, Hideyuki Takeuchi, Taro Ishikawa, Noriko Miyake, Hirotomo Saitsu, Naomichi Matsumoto, Fumiaki Tanaka

    Journal of the neurological sciences   416   117047 - 117047   2020.9

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    INTRODUCTION: Variants of CACNA1G, which encodes CaV3.1, have been reported to be associated with various neurological disorders. METHODS: Whole-exome sequencing of genomic DNA from 348 Japanese patients with neurodevelopmental disorders and their parents was conducted, and de novo variants of CACNA1G were extracted. The electrophysiological properties of each mutant channel were investigated by voltage-clamp and current-clamp analyses of HEK293T cells overexpressing these channels. RESULTS: Two patients diagnosed with Rett syndrome and West syndrome were found to have known pathological CACNA1G mutations reported in cerebellar ataxia cohorts: c.2881G > A, p.Ala961Thr and c.4591A > G, p.Met1531Val, respectively. One patient with Lennox-Gastaut syndrome was revealed to harbor a previously unreported heterozygous variant: c.3817A > T, p.Ile1273Phe. Clinical symptoms of the two patients with known mutations included severe developmental delay without acquisition of the ability to walk independently. The patient with a potentially novel mutation showed developmental delay, intractable seizures, and mild cerebral atrophy on MRI, but the severity of symptoms was milder than in the former two cases. Electrophysiological study using HEK293T cells demonstrated significant changes of T-type Ca2+ currents by p.Ala961Thr and p.Met1531Val SNVs, which were likely to enhance oscillation of membrane potential at low frequencies. In contrast, p.Ile1273Phe showed no significant effects in our electrophysiological evaluations, with its pathogenesis remaining undetermined. CONCLUSION: De novo variants of CACNA1G explain some neurodevelopmental disorders. Our study further provides information to understand the genotype-phenotype correlations of patients with CACNA1G mutations.

    DOI: 10.1016/j.jns.2020.117047

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  • [A case of subacute hypertrophic pachymeningitis caused by Pseudomonas aeruginosa infection presenting with subdural hygroma].

    Misako Kunii, Mitsuo Okamoto, Dan Takei, Shun Kubota, Haruko Nakamura, Fumiaki Tanaka

    Rinsho shinkeigaku = Clinical neurology   60 ( 8 )   538 - 542   2020.8

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    A 78-year-old woman with bilateral fungal sinusitis, which resulted in right orbital apex syndrome, underwent endoscopic sinus surgery and optic nerve decompression. Two months after the operation, she complained of anxiety and insomnia. Head CT showed subdural hematoma-like effusion and burr hole drainage was conducted. The collected fluid was not hematoma, but bloody, xanthochromic effusion with no pathogenic bacteria. Ten days later, she underwent drainage and dural biopsy after craniotomy because of relapse of subdural hygroma and progression of hypertrophic pachymeningitis associated with aggravation of psychiatric symptoms. A sample of the dura mater showed dense fibrosis with thickening, and Pseudomonas aeruginosa (P. aeruginosa) was detected by culture. Although otitis or sinusitis secondary to P. aeruginosa infection has been reported as a leading cause of infectious pachymeningitis, psychiatric symptoms alone and concomitant refractory subdural hygroma are atypical and unreported manifestations. In patients with pachymeningitis and a history of transnasal endoscopic surgery, P. aeruginosa infection should be considered, irrespective of an atypical clinical course and negative blood or fluid culture. Additionally, dural biopsy might help in detection of pathogenic bacteria.

    DOI: 10.5692/clinicalneurol.60.cn-001418

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  • CCR2 is localized in microglia and neurons, as well as infiltrating monocytes, in the lumbar spinal cord of ALS mice

    Hiroyasu Komiya, Hideyuki Takeuchi, Yuki Ogawa, Yuki Hatooka, Keita Takahashi, Atsuko Katsumoto, Shun Kubota, Haruko Nakamura, Misako Kunii, Mikiko Tada, Hiroshi Doi, Fumiaki Tanaka

    Molecular Brain   13 ( 1 )   2020.4

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    Abstract

    It remains controversial whether circulating monocytes expressing CCR2 infiltrate the central nervous system (CNS) and contribute to pathogenicity of amyotrophic lateral sclerosis (ALS). A previous report used conventional immunohistochemistry to show that CCR2 is exclusively expressed by astrocytes, but not infiltrating monocytes/microglia or neurons, in the spinal cords of ALS model mice. In this study, we assessed the cellular distribution of CCR2 in the CNS of ALS mice using CCR2-reporter mice (Ccr2<sup>rfp/+</sup>-Cx3cr1<sup>gfp/+</sup>-SOD1<sup>G93A</sup> Tg mice), a more sophisticated method for directly detecting the distribution of CCR2 protein. We found that infiltration of CCR2<sup>+</sup> monocytes in the lumbar spinal cord increased over the course of disease progression. Moreover, from the middle stage of disease, CCR2 was partially distributed in microglia and neurons, but not astrocytes, in striking contrast to the previous findings. These novel observations suggested that CCR2<sup>+</sup> monocyte infiltration leads to CNS environmental deterioration due to toxic conversion of microglia and neurons, creating a vicious cycle of neuroinflammation and leading to acceleration of ALS pathology. Our findings also show that this reporter mouse is a useful and powerful tool for obtaining new insights into the pathomechanisms of ALS.

    DOI: 10.1186/s13041-020-00607-3

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    Other Link: https://link.springer.com/article/10.1186/s13041-020-00607-3/fulltext.html

  • Long-read sequencing identifies the pathogenic nucleotide repeat expansion in RFC1 in a Japanese case of CANVAS

    Haruko Nakamura, Hiroshi Doi, Satomi Mitsuhashi, Satoko Miyatake, Kazutaka Katoh, Martin C. Frith, Tetsuya Asano, Yosuke Kudo, Takuya Ikeda, Shun Kubota, Misako Kunii, Yu Kitazawa, Mikiko Tada, Mitsuo Okamoto, Hideto Joki, Hideyuki Takeuchi, Naomichi Matsumoto, Fumiaki Tanaka

    Journal of Human Genetics   65 ( 5 )   475 - 480   2020.2

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    DOI: 10.1038/s10038-020-0733-y

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  • ミオキミー放電により診断した放射線照射後ニューロパチーによる首下がり症候群の66歳女性例

    宮地 洋輔, 中村 治子, 寺師 綾子, 土井 宏, 竹内 英之, 園生 雅弘, 田中 章景

    臨床神経学   60 ( 1 )   91 - 91   2020.1

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  • Tonsillectomy Improved Therapeutic Response in Anti-SRP Myopathy With Chronic Tonsillitis. International journal

    Takuya Ikeda, Hideyuki Takeuchi, Keita Takahashi, Haruko Nakamura, Misako Kunii, Atsuko Katsumoto, Mikiko Tada, Yuichi Higashiyama, Takashi Hibiya, Shigeaki Suzuki, Ichizo Nishino, Shigeru Koyano, Hiroshi Doi, Fumiaki Tanaka

    Frontiers in immunology   11   595480 - 595480   2020

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    Chronic tonsillitis has been attracted attention as a source of abnormal immune responses and a possible trigger of autoimmune diseases such as IgA nephritis, IgA vasculitis, palmoplantar pustulosis, psoriasis, rheumatoid arthritis, Behçet's disease, and myositis. Here we present the first report of anti-signal recognition particle antibody-associated necrotizing myopathy (anti-SRP myopathy) with IgA nephropathy and chronic tonsillitis in which the therapeutic response to intravenous immunoglobulin (IVIG) treatment was dramatically improved after tonsillectomy and accompanied by a rapid increase in ΔIgG, defined as the change in serum IgG levels 2 weeks after the start of IVIG treatment relative to pre-treatment levels. Moreover, serum anti-SRP antibody titers became undetectable after tonsillectomy even though the resected tonsils did not produce anti-SRP antibodies. Tonsillectomy should be considered when chronic tonsillitis is observed in patients with autoimmune diseases showing poor response to treatment, including anti-SRP myopathy.

    DOI: 10.3389/fimmu.2020.595480

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  • Alteration of the protein levels and/or posttranslational modification of CRMP 2 (Collapsin Response Mediator Protein 2) in the peripheral blood samples from young schizophrenia patients

    Munetaka Nomoto, Naoya Yamashita, Aoi Jitsuki-Takahashi, Haruko Nakamura, Hiroko Makihara, Fumio Nakamura, Snyder Evan Y, Yoshio Hirayasu, Yoshio Goshima

    Proceedings for Annual Meeting of The Japanese Pharmacological Society   93   2 - P   2020

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    DOI: 10.1254/jpssuppl.93.0_2-p-167

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  • GGC Repeat Expansion of NOTCH2NLC in Adult Patients with Leukoencephalopathy. Reviewed International journal

    Masaki Okubo, Hiroshi Doi, Ryoko Fukai, Atsushi Fujita, Satomi Mitsuhashi, Shunta Hashiguchi, Hitaru Kishida, Naohisa Ueda, Keisuke Morihara, Akihiro Ogasawara, Yuko Kawamoto, Tatsuya Takahashi, Keita Takahashi, Haruko Nakamura, Misako Kunii, Mikiko Tada, Atsuko Katsumoto, Hiromi Fukuda, Takeshi Mizuguchi, Satoko Miyatake, Noriko Miyake, Junichiro Suzuki, Yasuhiro Ito, Jun Sone, Gen Sobue, Hideyuki Takeuchi, Naomichi Matsumoto, Fumiaki Tanaka

    Annals of neurology   86 ( 6 )   962 - 968   2019.12

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    Leukoencephalopathies comprise a broad spectrum of disorders, but the genetic background of adult leukoencephalopathies has rarely been assessed. In this study, we analyzed 101 Japanese patients with genetically unresolved adult leukoencephalopathy using whole-exome sequencing and repeat-primed polymerase chain reaction for detecting GGC expansion in NOTCH2NLC. NOTCH2NLC was recently identified as the cause of neuronal intranuclear inclusion disease. We found 12 patients with GGC expansion in NOTCH2NLC as the most frequent cause of adult leukoencephalopathy followed by NOTCH3 variants in our cohort. Furthermore, we found 1 case with de novo GGC expansion, which might explain the underlying pathogenesis of sporadic cases. ANN NEUROL 2019;86:962-968.

    DOI: 10.1002/ana.25586

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  • Network-guided analysis of hippocampal proteome identifies novel proteins that colocalize with Aβ in a mice model of early-stage Alzheimer’s disease

    Aderemi Caleb Aladeokin, Tomoko Akiyama, Ayuko Kimura, Yayoi Kimura, Aoi Takahashi-Jitsuki, Haruko Nakamura, Hiroko Makihara, Daiki Masukawa, Jun Nakabayashi, Hisashi Hirano, Fumio Nakamura, Takashi Saito, Takaomi Saido, Yoshio Goshima

    Neurobiology of Disease   132   104603 - 104603   2019.12

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    DOI: 10.1016/j.nbd.2019.104603

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  • 脊髄性筋萎縮症9例に対するルシネルセンNa髄注の効果

    岸田 日帯, 木村 活生, 北澤 悠, 土橋 裕一, 安部 克哉, 鈴木 聡, 古泉 龍一, 高橋 慶太, 中村 治子, 竹内 英之, 上田 直久, 田中 章景

    臨床神経学   59 ( Suppl. )   S274 - S274   2019.11

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  • Ataxic phenotype with altered CaV3.1 channel property in a mouse model for spinocerebellar ataxia 42. Reviewed International journal

    Shunta Hashiguchi, Hiroshi Doi, Misako Kunii, Yukihiro Nakamura, Misa Shimuta, Etsuko Suzuki, Shigeru Koyano, Masaki Okubo, Hitaru Kishida, Masaaki Shiina, Kazuhiro Ogata, Fumiko Hirashima, Yukichi Inoue, Shun Kubota, Noriko Hayashi, Haruko Nakamura, Keita Takahashi, Atsuko Katsumoto, Mikiko Tada, Kenichi Tanaka, Toshikuni Sasaoka, Satoko Miyatake, Noriko Miyake, Hirotomo Saitsu, Nozomu Sato, Kokoro Ozaki, Kiyobumi Ohta, Takanori Yokota, Hidehiro Mizusawa, Jun Mitsui, Hiroyuki Ishiura, Jun Yoshimura, Shinichi Morishita, Shoji Tsuji, Hideyuki Takeuchi, Kinya Ishikawa, Naomichi Matsumoto, Taro Ishikawa, Fumiaki Tanaka

    Neurobiology of disease   130   104516 - 104516   2019.10

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    Spinocerebellar ataxia 42 (SCA42) is a neurodegenerative disorder recently shown to be caused by c.5144G > A (p.Arg1715His) mutation in CACNA1G, which encodes the T-type voltage-gated calcium channel CaV3.1. Here, we describe a large Japanese family with SCA42. Postmortem pathological examination revealed severe cerebellar degeneration with prominent Purkinje cell loss without ubiquitin accumulation in an SCA42 patient. To determine whether this mutation causes ataxic symptoms and neurodegeneration, we generated knock-in mice harboring c.5168G > A (p.Arg1723His) mutation in Cacna1g, corresponding to the mutation identified in the SCA42 family. Both heterozygous and homozygous mutants developed an ataxic phenotype from the age of 11-20 weeks and showed Purkinje cell loss at 50 weeks old. Degenerative change of Purkinje cells and atrophic thinning of the molecular layer were conspicuous in homozygous knock-in mice. Electrophysiological analysis of Purkinje cells using acute cerebellar slices from young mice showed that the point mutation altered the voltage dependence of CaV3.1 channel activation and reduced the rebound action potentials after hyperpolarization, although it did not significantly affect the basic properties of synaptic transmission onto Purkinje cells. Finally, we revealed that the resonance of membrane potential of neurons in the inferior olivary nucleus was decreased in knock-in mice, which indicates that p.Arg1723His CaV3.1 mutation affects climbing fiber signaling to Purkinje cells. Altogether, our study shows not only that a point mutation in CACNA1G causes an ataxic phenotype and Purkinje cell degeneration in a mouse model, but also that the electrophysiological abnormalities at an early stage of SCA42 precede Purkinje cell loss.

    DOI: 10.1016/j.nbd.2019.104516

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  • Adult-onset vocal cord paralysis in slow-channel congenital myasthenic syndrome

    Haruko Nakamura, Hiroyasu Komiya, Eri Uematsu, Yoshiharu Nakae, Kenichi Tanaka, Misako Kunii, Mikiko Tada, Hideto Joki, Shigeru Koyano, Naomichi Matsumoto, Hiroshi Doi, Hideyuki Takeuchi, Fumiaki Tanaka

    Neurology: Clinical Practice   9 ( 5 )   e45 - e47   2019.1

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    DOI: 10.1212/cpj.0000000000000599

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  • Proteome and behavioral alterations in phosphorylation-deficient mutant Collapsin Response Mediator Protein2 knock-in mice

    Haruko Nakamura, Aoi Takahashi-Jitsuki, Hiroko Makihara, Tetsuya Asano, Yayoi Kimura, Jun Nakabayashi, Naoya Yamashita, Yuko Kawamoto, Fumio Nakamura, Toshio Ohshima, Hisashi Hirano, Fumiaki Tanaka, Yoshio Goshima

    Neurochemistry International   119   207 - 217   2018.10

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    DOI: 10.1016/j.neuint.2018.04.009

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  • Genetic analysis of adult leukoencephalopathy patients using a custom‐designed gene panel

    M. Kunii, H. Doi, Y. Ishii, C. Ohba, K. Tanaka, M. Tada, R. Fukai, S. Hashiguchi, H. Kishida, N. Ueda, Y. Kudo, C. Kugimoto, T. Nakano, N. Udaka, S. Miyatake, N. Miyake, H. Saitsu, Y. Ito, K. Takahashi, H. Nakamura, A. Tomita‐Katsumoto, H. Takeuchi, S. Koyano, N. Matsumoto, F. Tanaka

    Clinical Genetics   94 ( 2 )   232 - 238   2018.6

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    Leukoencephalopathies encompass all clinical syndromes that predominantly affect brain white matter. Genetic diagnosis informs clinical management of these patients, but a large part of the genetic contribution to adult leukoencephalopathy remains unresolved. To examine this genetic contribution, we analyzed genomic DNA from 60 Japanese patients with adult leukoencephalopathy of unknown cause by next generation sequencing using a custom‐designed gene panel. We selected 55 leukoencephalopathy‐related genes for the gene panel. We identified pathogenic mutations in 8 of the 60 adult leukoencephalopathy patients (13.3%): NOTCH3 mutations were detected in 5 patients, and EIF2B2, CSF1R, and POLR3A mutations were found independently in 1 patient each. These results indicate that cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) caused by NOTCH3 mutations is the most frequent adult leukoencephalopathy in our cohort. Moreover, brain imaging analysis indicates that CADASIL patients who do not present typical phenotypes may be underdiagnosed if not examined genetically.

    DOI: 10.1111/cge.13371

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  • Cerebrospinal fluid level of Nogo receptor 1 antagonist lateral olfactory tract usher substance (LOTUS) correlates inversely with the extent of neuroinflammation

    Keita Takahashi, Hideyuki Takeuchi, Yuji Kurihara, Hiroshi Doi, Misako Kunii, Kenichi Tanaka, Haruko Nakamura, Ryoko Fukai, Atsuko Tomita-Katsumoto, Mikiko Tada, Yuichi Higashiyama, Hideto Joki, Shigeru Koyano, Kohtaro Takei, Fumiaki Tanaka

    Journal of Neuroinflammation   15 ( 1 )   2018.2

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    DOI: 10.1186/s12974-018-1084-x

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  • Probing the lithium-response pathway in hiPSCs implicates the phosphoregulatory set-point for a cytoskeletal modulator in bipolar pathogenesis

    Brian T. D. Tobe, Andrew M. Crain, Alicia M. Winquist, Barbara Calabrese, Hiroko Makihara, Wen-ning Zhao, Jasmin Lalonde, Haruko Nakamura, Glenn Konopaske, Michelle Sidor, Cameron D. Pernia, Naoya Yamashita, Moyuka Wada, Yuuka Inoue, Fumio Nakamura, Steven D. Sheridan, Ryan W. Logan, Michael Brandel, Dongmei Wu, Joshua Hunsberger, Laurel Dorsett, Cordulla Duerr, Ranor C. B. Basa, Michael J. McCarthy, Namrata D. Udeshi, Philipp Mertins, Steven A. Carr, Guy A. Rouleau, Lina Mastrangelo, Jianxue Li, Gustavo J. Gutierrez, Laurence M. Brill, Nikolaos Venizelos, Guang Chen, Jeffrey S. Nye, Husseini Manji, Jeffrey H. Price, Colleen A. McClung, Hagop S. Akiskal, Martin Alda, De-Maw M. Chuang, Joseph T. Coyle, Yang Liu, Yang D. Teng, Toshio Ohshima, Katsuhiko Mikoshiba, Richard L. Sidman, Shelley Halpain, Stephen J. Haggarty, Yoshio Goshima, Evan Y. Snyder

    Proceedings of the National Academy of Sciences   114 ( 22 )   2017.5

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    Significance

    One-third of bipolar disorder (BPD) patients are lithium-responsive (LiR) for unknown reasons. Were lithium’s target to be identified, then BPD’s pathogenesis might be unraveled. We identified and mapped the “lithium-response pathway,” which governs the phosphorylation of CRMP2 , a cytoskeleton regulator, particularly for dendritic spines: hence, a neural network modulator. Although “toggling” between inactive (phosphorylated) and active (nonphosphorylated) CRMP2 is physiologic, the “set-point” in LiR BPD is abnormal. Lithium (and other pathway-modulators) normalize that set-point. Hence, BPD is a disorder not of a gene but of the posttranslational regulation of a developmentally critical molecule. Such knowledge should enable better mechanistically based treatments and bioassays. Instructively, lithium was our “molecular can-opener” for “prying” intracellularly to reveal otherwise inscrutable pathophysiology in this complex polygenic disorder.

    DOI: 10.1073/pnas.1700111114

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  • Comprehensive behavioral study and proteomic analyses of <scp>CRMP</scp>2‐deficient mice

    Haruko Nakamura, Naoya Yamashita, Ayuko Kimura, Yayoi Kimura, Hisashi Hirano, Hiroko Makihara, Yuko Kawamoto, Aoi Jitsuki‐Takahashi, Kumiko Yonezaki, Kenkichi Takase, Tomoyuki Miyazaki, Fumio Nakamura, Fumiaki Tanaka, Yoshio Goshima

    Genes to Cells   21 ( 10 )   1059 - 1079   2016.9

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    Collapsin response mediator protein 2 (CRMP2) plays a key role in axon guidance, dendritic morphogenesis and cell polarization. CRMP2 is implicated in various neurological and psychiatric disorders. However, in vivo functions of CRMP2 remain unknown. We generated CRMP2 gene‐deficient (crmp2<sup>−/−</sup>) mice and examined their behavioral phenotypes. During 24‐h home cage monitoring, the activity level during the dark phase of crmp2<sup>−/−</sup> mice was significantly higher than that of wild‐type (WT) mice. Moreover, the time during the open arm of an elevated plus maze was longer for crmp2<sup>−/−</sup> mice than for WT mice. The duration of social interaction was shorter for crmp2<sup>−/−</sup> mice than for WT mice. Crmp2<sup>−/−</sup> mice also showed mild impaired contextual learning. We then examined the methamphetamine‐induced behavioral change of crmp2<sup>−/−</sup> mice. Crmp2<sup>−/−</sup> mice showed increased methamphetamine‐induced ambulatory activity and serotonin release. Crmp2<sup>−/−</sup> mice also showed altered expression of proteins involved in GABAergic synapse, glutamatergic synapse and neurotrophin signaling pathways. In addition, SNAP25, RAB18, FABP5, ARF5 and LDHA, which are related genes to schizophrenia and methamphetamine sensitization, are also decreased in crmp2<sup>−/−</sup> mice. Our study implies that dysregulation of CRMP2 may be involved in pathophysiology of neuropsychiatric disorders.

    DOI: 10.1111/gtc.12403

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  • CRMP1 and CRMP2 have synergistic but distinct roles in dendritic development

    Hiroko Makihara, Shiori Nakai, Wataru Ohkubo, Naoya Yamashita, Fumio Nakamura, Hiroshi Kiyonari, Go Shioi, Aoi Jitsuki‐Takahashi, Haruko Nakamura, Fumiaki Tanaka, Tomoko Akase, Pappachan Kolattukudy, Yoshio Goshima

    Genes to Cells   21 ( 9 )   994 - 1005   2016.8

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    Collapsin response mediator protein 2, CRMP2, has been identified as an intracellular signaling mediator for Semaphorin 3A (Sema3A). CRMP2 plays a key role in axon guidance, dendritic morphogenesis, and cell polarization. It has been also implicated in a variety of neurological and psychiatric disorders. However, the in vivo functions of CRMP2 remain unknown. We generated CRMP2 gene‐deficient (crmp2<sup>−/−</sup>) mice. The crmp2<sup>−/−</sup> mice showed irregular development of dendritic spines in cortical neurons. The density of dendritic spines was reduced in the cortical layer V pyramidal neurons of crmp2<sup>−/−</sup> mice as well as in those of sema3A<sup>−/−</sup> and crmp1<sup>−/−</sup> mice. However, no abnormality was found in dendritic patterning in crmp2<sup>−/−</sup> compared to wild‐type (WT) neurons. The level of CRMP1 was increased in crmp2<sup>−/−</sup>, but the level of CRMP2 was not altered in crmp1<sup>−/−</sup> compared to WT cortical brain lysates. Dendritic spine density and branching were reduced in double‐heterozygous sema3A<sup>+/−</sup>;crmp2<sup>+/−</sup> and sema3A<sup>+/−</sup>;crmp1<sup>+/−</sup> mice. The phenotypic defects had no genetic interaction between crmp1 and crmp2. These findings suggest that both CRMP1 and CRMP2 mediate Sema3A signaling to regulate dendritic spine maturation and patterning, but through overlapping and distinct signaling pathways.

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  • Quantitative analysis of intraneuronal transport in human iPS neurons

    Haruko Nakamura, Naoya Yamashita, Yuri Kanamaru, Takahiko Tachibana, Yuko Sekino, Sandy Chen, Toshiyuki Gotoh, Fumiaki Tanaka, Yoshio Goshima

    Journal of Pharmacological Sciences   128 ( 4 )   170 - 178   2015.8

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    DOI: 10.1016/j.jphs.2015.06.006

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  • An Aerodynamic Study of Phonations in Patients With Parkinson Disease (PD)

    Yukiko Ikui, Haruko Nakamura, Daisuke Sano, Hiroshi Hyakusoku, Hitaru Kishida, Yosuke Kudo, Hideto Joki, Shigeru Koyano, Akihito Yamauchi, Shingo Takano, Niro Tayama, Hajime Hirose, Nobuhiko Oridate, Fumiaki Tanaka

    Journal of Voice   29 ( 3 )   273 - 280   2015.5

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    DOI: 10.1016/j.jvoice.2014.08.012

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  • Isolated Unilateral Ptosis due to Paramedian Midbrain Infarction

    Eriko Sugawara, Haruko Nakamura, Masanao Endo, Fumiaki Tanaka, Tatsuya Takahashi

    Journal of Stroke and Cerebrovascular Diseases   24 ( 5 )   e121 - e123   2015.5

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    DOI: 10.1016/j.jstrokecerebrovasdis.2015.01.027

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  • 【自己免疫性脳炎-抗原・抗体は何をしている?】Collapsin response mediator proteins Collapsin response mediator proteinの機能

    中村 治子, 田中 章景, 五嶋 良郎

    Clinical Neuroscience   33 ( 1 )   90 - 93   2015.1

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  • A case of IgM paraproteinemic neuropathy associated with anti-sulfated glucuronic paragloboside (SGPG) IgG antibody without anti-myelin-associated glycoprotein (MAG) activity

    Haruko Nakamura, Masanao Endo, Eriko Sugawara, Motoi Kuwahara, Susumu Kusunoki, Fumiaki Tanaka, Tatsuya Takahashi

    Rinsho Shinkeigaku   53 ( 10 )   799 - 802   2013

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    DOI: 10.5692/clinicalneurol.53.799

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MISC

  • 緑膿菌感染による肥厚性硬膜炎に伴い硬膜下水腫を呈した1例

    國井 美紗子, 岡本 光生, 竹井 暖, 窪田 瞬, 中村 治子, 田中 章景

    臨床神経学   60 ( 8 )   538 - 542   2020.8

  • 声帯麻痺を呈したSlow Channel Congenital Myasthenic Syndrome(SCCMS)の52歳男性例

    中村 治子, 國井 美紗子, 古宮 裕泰, 多田 美紀子, 上木 英人, 土井 宏, 竹内 英之, 田中 章景

    臨床神経学   59 ( 4 )   224 - 224   2019.4

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  • 舌癌に対する放射線治療後に首下がりを呈し、針筋電図でミオキミー発射が認められた一例

    寺師 綾子, 宮地 洋輔, 中村 治子, 園生 雅弘, 田中 章景

    臨床神経生理学   46 ( 5 )   535 - 535   2018.10

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  • 亜急性進行性認知機能障害と多彩な白質病変を呈した神経梅毒の1例

    國井 美紗子, 伊東 毅, 川口 優花, 中村 治子, 勝元 敦子, 多田 美紀子, 岡本 光生, 玉澤 彰英, 土井 宏, 竹内 英之, 田中 章景

    NEUROINFECTION   23 ( 2 )   232 - 232   2018.10

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  • 運動失調で発症し亜急性に認知症を呈したCreutzfeldt-Jakob病の73歳男性例

    川口 優花, 中村 治子, 國井 美紗子, 勝元 敦子, 多田 美紀子, 岡本 光生, 土井 宏, 田中 章景

    臨床神経学   58 ( 8 )   531 - 531   2018.8

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  • Mice lacking collapsin response mediator protein 2 manifest hyperactivity, impaired emotional behavior and reduced social interaction

    Haruko Nakamura, Naoya Yamashita, Hiroshi Kiyonari, Go Shioi, Fumiaki Tanaka, Yoshio Goshima

    JOURNAL OF PHARMACOLOGICAL SCIENCES   130 ( 3 )   S231 - S231   2016.3

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    Web of Science

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  • Collapsin response mediator protein 1 (CRMP1) and CRMP2 mediate Semaphorin3A signaling through distinct pathway in vivo

    Hiroko Makihara, Shiori Nakai, Aoi Jitsuki-Takahashi, Haruko Nakamura, Naoya. Yamashita, Hiroshi Kiyonari, Go Shioi, Fumio Nakamura, Fumiaki Tanaka, Yoshio Goshima

    JOURNAL OF PHARMACOLOGICAL SCIENCES   130 ( 3 )   S155 - S155   2016.3

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    Web of Science

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  • Parkinson病外来患者における栄養状態の評価(第2報)

    工藤 洋祐, 中村 治子, 東山 雄一, 上木 英人, 児矢野 繁, 田中 章景

    臨床神経学   54 ( Suppl. )   S237 - S237   2014.12

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  • パーキンソン病患者の発声機能の検討

    生井 友紀子, 佐野 大佑, 百束 紘, 中村 治子, 東山 雄一, 田中 章景, 廣瀬 肇, 折舘 伸彦

    音声言語医学   55 ( 1 )   67 - 67   2014.1

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  • パーキンソン病の発声障害と高次脳機能障害についての検討

    中村 治子, 生井 友紀子, 佐野 大佑, 東山 雄一, 工藤 洋祐, 上木 英人, 上田 直久, 児矢野 繁, 鈴木 ゆめ, 田中 章景

    臨床神経学   53 ( 12 )   1493 - 1493   2013.12

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  • SCARB2遺伝子に変異を認めた高齢発症の進行性ミオクローヌてんかん兄妹例

    東山 雄一, 土井 宏, 阿部 弘基, 中村 治子, 工藤 洋祐, 上木 英人, 児矢野 繁, 鈴木 ゆめ, 黒岩 義之, 松本 直通, 田中 章景

    臨床神経学   53 ( 12 )   1641 - 1641   2013.12

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  • パーキンソン病における声の音声言語医学的解析

    生井 友紀子, 中村 治子, 東山 雄一, 佐野 大佑, 廣瀬 肇, 田中 章景

    臨床神経学   53 ( 12 )   1432 - 1432   2013.12

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  • Lewy小体型認知症および認知症を伴うParkinson病における脳MRI上の脳血管病変の検討

    上木 英人, 工藤 洋祐, 東山 雄一, 中村 治子, 児矢野 繁, 田中 章景

    臨床神経学   53 ( 12 )   1421 - 1421   2013.12

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  • Parkinson病外来患者における栄養状態の評価

    工藤 洋祐, 中村 治子, 上木 英人, 児矢野 繁, 田中 章景

    臨床神経学   53 ( 12 )   1561 - 1561   2013.12

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  • 急性外眼筋麻痺の9年後にBickerstaff脳幹脳炎を発症した24歳男性例

    齊藤 麻美, 中村 治子, 東山 雄一, 工藤 洋祐, 上木 英人, 児矢野 繁, 鈴木 ゆめ, 田中 章景

    臨床神経学   53 ( 10 )   885 - 885   2013.10

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  • 血栓傾向を呈したヘルペス脳炎の61歳男性例

    中村 治子, 室橋 洋子, 上木 英人, 児矢野 繁, 黒岩 義之

    臨床神経学   53 ( 3 )   251 - 251   2013.3

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  • パラプロテイン血症に伴うニューロパチーIgM高値の3例

    遠藤 雅直, 高橋 竜哉, 中村 治子, 菅原 恵梨子, 柏倉 麻里, 室橋 洋子, 上木 英人, 鈴木 ゆめ, 黒岩 義之, 瀬川 文徳

    末梢神経   22 ( 2 )   344 - 345   2011.12

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  • タクロリムスを用いた重症筋無力症の治療

    西山 毅彦, 桃尾 隆之, 工藤 洋祐, 関口 健志, 仲野 達, 中村 治子, 富澤 昭子, 島村 めぐみ, 岸田 日帯, 黒岩 義之

    臨床神経学   51 ( 12 )   1292 - 1292   2011.12

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Awards

  • JHG Young Scientists Award

    2023.10   The Japan Society of human genetics   Long-read sequencing identifies the pathogenic nucleotide repeat expansion in RFC1 in a Japanese case of CANVAS

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  • 優秀発表賞

    2016.9   第38回日本生物学的精神医学会・第59回日本神経化学会大会 合同年会  

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Research Projects

  • iPS神経細胞を用いた神経核内封入体病の病態解明

    Grant number:24K18689  2024.4 - 2029.3

    日本学術振興会  科学研究費助成事業  若手研究

    中村 治子

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    Grant amount:\4680000 ( Direct Cost: \3600000 、 Indirect Cost:\1080000 )

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  • 新規動物モデル、iPS細胞モデルを用いたCANVASの病態解明

    Grant number:24K10664  2024.4 - 2027.3

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    土井 宏, 森本 悟, 田中 章景, 中村 治子, 國井 美紗子

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    Grant amount:\4680000 ( Direct Cost: \3600000 、 Indirect Cost:\1080000 )

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  • RFC1関連スペクトラム障害CANVASの病態解明

    Grant number:24ek0109648h0002  2023.4 - 2026.3

    日本医療研究開発機構  難治性疾患実用化研究事業 

    田中章景, 土井宏, 中村治子, 松本直通, 森本悟, 塩田倫史

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  • The development of the treatment of neurodegenerative disorders based on the functional analysis of CRMP2

    Grant number:18K15457  2021.11 - 2024.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Early-Career Scientists

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    Grant amount:\4160000 ( Direct Cost: \3200000 、 Indirect Cost:\960000 )

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  • CRMP2を標的とした多系統委縮症の病態解明および治療法開発

    Grant number:17H06991  2017.8 - 2019.3

    日本学術振興会  科学研究費助成事業  研究活動スタート支援

    中村 治子

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    Grant amount:\2600000 ( Direct Cost: \2000000 、 Indirect Cost:\600000 )

    【MSAと他のパーキンソニズム関連疾患におけるtotal CRMP2,リン酸化CRMP2を免疫組織学的手法,ウェスタンブロッティングを用いた検討】
    ①免疫組織学的検討:コントロールとMSA,PDの脳切片におけるtotal CRMP2,リン酸化CRMP2の発現について検討を行ったところ、MSAではtotal CRMP2,リン酸化CRMP2の発現が上昇していた。MSAの脳切片に対し、蛍光組織染色にてtotal CRMP2、リン酸化CRMP2、オートファジーマーカーLC3、リン酸化αシヌクレインで染色を行ったところ、total CRMP2、リン酸化CRMP2はLC3、リン酸化αシヌクレインと一部共局在を示した。また、PDでも軽度total CRMP2,リン酸化CRMP2の発現が上昇していたが、MSAと比較すると軽度であった。
    ②凍結脳におけるtotal CRMP2,リン酸化CRMP2のウェスタンブロッティングを用いた検討:凍結脳(前頭前野、小脳皮質、小脳白質、中脳)をfractionationし、可溶分画、不溶分画に分け、それぞれの分画におけるtotal CRMP2,リン酸化CRMP2の発現について検討を行った。前頭前野の不溶分画においてリン酸化CRMP2については発現のばらつきがあり一定の傾向は得られなかったが、total CRMP2の発現がMSA,PDで上昇傾向であった。一方可溶分画においてはリン酸化CRMP2はMSA,PDで低下傾向を示した。

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