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Pathophysiological analysis of congenital myasthenia syndrome and other disorders using human neuromuscular junction models

Research Project

Project/Area Number 20H03642
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 52050:Embryonic medicine and pediatrics-related
Research InstitutionKyoto University

Principal Investigator

Saito Megumu  京都大学, iPS細胞研究所, 教授 (90535486)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2023: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2020: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Keywords脊髄性筋萎縮症 / SMN / iPS細胞 / 骨格筋 / miRNA / ミトコンドリア / 転写制御 / 先天性筋無力症候群 / 神経筋接合部 / 多能性幹細胞 / 先天性筋無力症
Outline of Research at the Start

神経筋接合部(Neuromuscular junction: NMJ) は運動神経と筋組織の接合部であり、シナプスが形成されている。NMJの機能異常は様々な疾患を引き起こすが、なかでも先天性筋無力症候群(congenital myasthenic syndrome: CMS)をはじめとする先天性疾患は特異的治療法が存在しないものも多く、その病態解明と治療法開発は重要である。申請者らは、2019年度までの科研費基盤Bにおいて、ヒト多能性幹細胞から運動神経や骨格筋などを同時に誘導し、機能的・形態的に成熟したNMJを構築する系を発明した(Lin CY, JCIinsight 2019)。本申請では、この分化系を活用し、CMSや脊髄性筋萎縮症を対象疾患として、ヒトNMJ病変の病態解明を目標とする。

Outline of Final Research Achievements

We succeeded in constructing an in vitrol model of congenital myasthenia syndrome (CMS) by using human induced pluripotent stem cells (iPS cells). We also constructed a model of skeletal muscle lesions in spinal muscular atrophy (SMA) and found that cells lacking SMN, the gene responsible for SMA, have abnormal mitochondrial function during muscle differentiation, resulting in impaired muscle differentiation due to abnormal energy metabolism and excessive production of reactive oxygen species. We also found that SMN localizes into the nucleus during muscle differentiation, binds to the genome, and is involved in the transcriptional regulation of several muscle differentiation-related factors, including miRNAs.

Academic Significance and Societal Importance of the Research Achievements

本研究により、CMSの病態モデル構築に成功した。また、SMAの骨格筋病変の発症機構の1つが明らかになった。SMNの新しい機能として、SMNがゲノム上で特定の転写因子と相互作用し、その標的遺伝子の発現調節に関与している可能性を示した。これらの成果は、ヒト体細胞における細胞種特異的な遺伝子転写制御の一端を明らかにし、骨格筋を標的としたSMAの新規治療法の可能性を提示するものである。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (25 results)

All 2023 2022 2021 2020 Other

All Journal Article (16 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 16 results,  Open Access: 8 results) Presentation (8 results) (of which Invited: 8 results) Remarks (1 results)

  • [Journal Article] Involvement of mTOR pathway in neurodegeneration in NSF-related developmental and epileptic encephalopathy2023

    • Author(s)
      Hayashi Takahiro、Yano Naoko、Kora Kengo、Yokoyama Atsushi、Maizuru Kanako、Kayaki Taisei、Nishikawa Kinuko、Osawa Mitsujiro、Niwa Akira、Takenouchi Toshiki、Hijikata Atsushi、Shirai Tsuyoshi、Suzuki Hisato、Kosaki Kenjiro、Saito Megumu K、Takita Junko、Yoshida Takeshi
    • Journal Title

      Human Molecular Genetics

      Volume: 32 Issue: 10 Pages: 1683-1697

    • DOI

      10.1093/hmg/ddad008

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] UK-5099, a mitochondrial pyruvate carrier inhibitor, recovers impaired neutrophil maturation caused by AK2 deficiency in human pluripotent stem cell models2023

    • Author(s)
      Jingxin Wang, Norikazu Saiki , Ayako Tanimura , Takafumi Noma , Akira Niwa , Tastutoshi Nakahata , Megumu K Saito
    • Journal Title

      Biochemical and biophysical research communications

      Volume: 687 Pages: 149211-149211

    • DOI

      10.1016/j.bbrc.2023.149211

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] ZEB2 and MEIS1 independently contribute to hematopoiesis via early hematopoietic enhancer activation2023

    • Author(s)
      Kitagawa Yohko、Ikenaka Akihiro、Sugimura Ryohichi、Niwa Akira、Saito Megumu K.
    • Journal Title

      iScience

      Volume: 26 Issue: 10 Pages: 107893-107893

    • DOI

      10.1016/j.isci.2023.107893

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Cryptotanshinone is a candidate therapeutic agent for interstitial lung disease associated with a BRICHOS-domain mutation of SFTPC2023

    • Author(s)
      Motoyasu Hosokawa, Ryuta Mikawa, Atsuko Hagiwara, Yukiko Okuno, Tomonari Awaya, Yuki Yamamoto, Senye Takahashi, Haruka Yamaki, Mitsujiro Osawa, Yasuhiro Setoguchi, Megumu K Saito, Shinji Abe, Toyohiro Hirai, Shimpei Gotoh, Masatoshi Hagiwara
    • Journal Title

      iScience

      Volume: 26 Issue: 10 Pages: 107731-107731

    • DOI

      10.1016/j.isci.2023.107731

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A disease-specific iPS cell resource for studying rare and intractable diseases2023

    • Author(s)
      Saito Megumu K.、Osawa Mitsujiro、Tsuchida Nao、Shiraishi Kotaro、Niwa Akira、Woltjen Knut、Asaka Isao、Ogata Katsuhisa、Ito Suminobu、Kobayashi Shuzo、Yamanaka Shinya
    • Journal Title

      Inflammation and Regeneration

      Volume: 43 Issue: 1

    • DOI

      10.1186/s41232-023-00294-2

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A concise in vitro model for evaluating interactions between macrophage and skeletal muscle cells during muscle regeneration2023

    • Author(s)
      Kase Naoya、Kitagawa Yohko、Ikenaka Akihiro、Niwa Akira、Saito Megumu K.
    • Journal Title

      Frontiers in Cell and Developmental Biology

      Volume: 11

    • DOI

      10.3389/fcell.2023.1022081

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Tofacitinib, a suppressor of NOD2 expression, is a potential treatment for Blau syndrome2023

    • Author(s)
      Ueki Yoko、Takimoto-Ito Riko、Saito Megumu K.、Tanizaki Hideaki、Kambe Naotomo
    • Journal Title

      Frontiers in Immunology

      Volume: 14

    • DOI

      10.3389/fimmu.2023.1211240

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] SMN promotes mitochondrial metabolic maturation during myogenesis by regulating the MYOD-miRNA axis2023

    • Author(s)
      Ikenaka Akihiro、Kitagawa Yohko、Yoshida Michiko、Lin Chuang-Yu、Niwa Akira、Nakahata Tatsutoshi、Saito Megumu K
    • Journal Title

      Life Science Alliance

      Volume: 6 Issue: 3 Pages: e202201457-e202201457

    • DOI

      10.26508/lsa.202201457

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Generation of human induced pluripotent stem cell lines derived from four DiGeorge syndrome patients with 22q11.2 deletion2022

    • Author(s)
      Shimizu Tomoya、Matsuo-Takasaki Mami、Luijkx Dorian、Takami Miho、Arai Yutaka、Noguchi Michiya、Nakamura Yukio、Hayata Tadayoshi、Saito Megumu K.、Hayashi Yohei
    • Journal Title

      Stem Cell Research

      Volume: 61 Pages: 102744-102744

    • DOI

      10.1016/j.scr.2022.102744

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Induction of Human Natural Killer Cells Under Defined Conditions by Seamless Transition from Maintenance Culture of Pluripotent Stem Cells2022

    • Author(s)
      Niwa Akira、Saito Megumu K.
    • Journal Title

      Methods Mol Biol

      Volume: N/A Pages: 47-52

    • DOI

      10.1007/978-1-0716-2160-8_4

    • ISBN
      9781071621592, 9781071621608
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Anti-TNF treatment corrects IFN-γ?dependent proinflammatory signatures in Blau syndrome patient?derived macrophages2022

    • Author(s)
      Kitagawa Yohko、Kawasaki Yuri、Yamasaki Yuichi、Kambe Naotomo、Takei Syuji、Saito Megumu K.
    • Journal Title

      Journal of Allergy and Clinical Immunology

      Volume: 149 Issue: 1 Pages: 176-188.e7

    • DOI

      10.1016/j.jaci.2021.05.030

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Investigation of the molecular causes underlying physical abnormalities in Diamond‐Blackfan anemia patients with RPL5 haploinsufficiency2021

    • Author(s)
      Fukui Yuko、Hayano Satoru、Kawanabe Noriaki、Wang Ziyi、Shimada Akira、Saito Megumu K.、Asaka Isao、Kamioka Hiroshi
    • Journal Title

      Pathology International

      Volume: 71 Issue: 12 Pages: 803-813

    • DOI

      10.1111/pin.13168

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] N-Acetylcysteine prevents amyloid-β secretion in neurons derived from human pluripotent stem cells with trisomy 212021

    • Author(s)
      Toshikawa Hiromitsu、Ikenaka Akihiro、Li Li、Nishinaka-Arai Yoko、Niwa Akira、Ashida Akira、Kazuki Yasuhiro、Nakahata Tatsutoshi、Tamai Hiroshi、Russell David W.、Saito Megumu K.
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 17377-17377

    • DOI

      10.1038/s41598-021-96697-7

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Generation of two human induced pluripotent stem cell lines derived from two X-linked adrenoleukodystrophy patients with ABCD1 mutations2021

    • Author(s)
      Kuramochi Yuji、Awaya Tomonari、Matsuo-Takasaki Mami、Takami Miho、An Yuri、Li Jingyue、Hemmi Yasuko、Wakabayashi Tamami、Arai Yutaka、Inoue Jun、Noguchi Michiya、Nakamura Yukio、Asaka Isao、Akimoto Kazunori、Saito Megumu K.、Hayashi Yohei
    • Journal Title

      Stem Cell Research

      Volume: 53 Pages: 102337-102337

    • DOI

      10.1016/j.scr.2021.102337

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Analysis of disease model iPSCs derived from patients with a novel Fanconi anemia-like IBMFS ADH5/ALDH2 deficiency.2021

    • Author(s)
      Anfeng Mu, Asuka Hira, Akira Niwa, Mitsujiro Osawa, Kenichi Yoshida, Minako Mori, Yusuke Okamoto, Kazuko Inoue, Keita Kondo, Masato T. Kanemaki, Tomonari Matsuda, Etsuro Ito, Seiji Kojima, Tatsutoshi Nakahata, Seishi Ogawa, Keigo Tanaka, Keitaro Matsuo, Megumu K. Saito, Minoru Takata.
    • Journal Title

      Blood

      Volume: 137 Issue: 15 Pages: 2021-2032

    • DOI

      10.1182/blood.2020009111

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] In vitro Neuromuscular Junction Induced from Human Induced Pluripotent Stem Cells2020

    • Author(s)
      Lin Chuang-Yu、Yoshida Michiko、Li Li-Tzu、Saito Megumu K.
    • Journal Title

      Journal of Visualized Experiments

      Volume: 166 Issue: 166

    • DOI

      10.3791/61396

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Untangling the Mystery of Rare and Intractable Diseases Using induced Pluripotent Stem (iPS) Cells2023

    • Author(s)
      齋藤潤
    • Organizer
      The 18th Congress of Asian society for pediatric research
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] iPS細胞を用いた疾患モデリングの現状について2023

    • Author(s)
      齋藤潤
    • Organizer
      ユルトミリスMG適応症追加承認取得1周年記念講演会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] iPS細胞を用いた希少疾患研究促進のための取り組みについて2022

    • Author(s)
      齋藤潤
    • Organizer
      IRUD workshop 2022
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Research on pathophysiological analysis of rare diseases using disease iPS cells2022

    • Author(s)
      齋藤潤
    • Organizer
      第45回日本分子生物学会年会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 疾患iPS細胞を用いた染色体異常症の病態解析2022

    • Author(s)
      齋藤潤
    • Organizer
      日本人類遺伝学会67回大会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 疾患iPS細胞を活用した血液・免疫疾患研究、及びマッチング事業について2021

    • Author(s)
      齋藤潤
    • Organizer
      AMED・再生・細胞医療・遺伝子治療プロジェクト研究開発交流会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] iPS 細胞を用いた疾患モデリングと希少疾患研究のマッチング事業とその成果2021

    • Author(s)
      齋藤潤
    • Organizer
      IRUD 班会議
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 疾患特異的iPS細胞を用いた難治性疾患の病態解析と治療法開発2021

    • Author(s)
      齋藤潤
    • Organizer
      日本学術会議・日本薬学会主催シンポジウム
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Remarks] 脊髄性筋萎縮症における骨格筋病変の発症メカニズムの一部を解明

    • URL

      https://www.cira.kyoto-u.ac.jp/j/pressrelease/news/230117-110000.html

    • Related Report
      2022 Annual Research Report

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Published: 2020-04-28   Modified: 2025-01-30  

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