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Analysis of sleep disorder phenotypes in mouse models of Rett Syndrome for drug discovery

Research Project

Project/Area Number 20K08198
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52050:Embryonic medicine and pediatrics-related
Research InstitutionKurume University

Principal Investigator

Takahashi Tomoyuki  久留米大学, 高次脳疾患研究所, 教授 (20332687)

Co-Investigator(Kenkyū-buntansha) 河原 幸江  久留米大学, 医学部, 准教授 (10279135)
佐藤 貴弘  久留米大学, 付置研究所, 准教授 (50368883)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2023: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywordsレット症候群 / Rett症候群
Outline of Research at the Start

レット症候群(RTT)は、MeCP2遺伝子変異を主因とし、主に女児で発症する神経発達障害で、多様な神経症状を特徴とする。中でも、80%以上の患者で合併する睡眠障害は、本人のQOL低下に加え、介護者の負担を増加させ、臨床における問題の一つである。
本研究は、MeCP2遺伝子を欠損したRTTモデルマウス、細胞を用いて、睡眠障害の病態における体内時計、概日リズム、睡眠・覚醒制御システムの役割を解明し、睡眠障害をはじめとするRTTの病態メカニズムに迫るとともに、睡眠・覚醒制御システムの調節による治療の可能性を調べることを目的としている。

Outline of Final Research Achievements

Rett syndrome (RTT) is a neurodevelopmental disorder mainly caused by mutations in the gene encoding the transcriptional regulator Methyl-CpG-binding protein 2 (MeCP2), located on the X chromosome. Many RTT patients have sleep problems, such as insomnia characterized by difficulties initiating and maintaining sleep, prolonged night awakenings, and circadian sleep disorders. However, little is known about neural mechanisms underlying the sleep-wake problems of RTT. In this study, we found that Mecp2-null mice have sleep problems such as fragmented sleep and abnormal sleep structure. In addition, MeCP2 deficiency affected the expression of several neuromodulator genes in the hypothalamus. Among them, expression of Hcrt/orexin recptors gene was reduced in Mecp2-null brain and hypocretin/orexin signals were attenuated in Mecp2-null mice. These findings suggest that alteration of orexin signal transduction in Mecp2-null mice may be one of the causes of sleep problems in Mecp2-null mice.

Academic Significance and Societal Importance of the Research Achievements

レット症候群(RTT)は、主に女児で発症する重度の神経発達症である。一遺伝子の変異によって引き起こされるRTTは、神経発達症の病態メカニズムを解析する上で良いモデルとなるとして注目されている。この事から、本研究課題における RTTの睡眠障害をはじめとする様々な病態メカニズムの研究は、神経発達症をはじめとする様々な神経精神疾患への応用が期待される。

Report

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

    (10 results)

All 2022 2021 2020

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (6 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Journal Article] Moving towards a novel therapeutic strategy for hyperammonemia that targets glutamine metabolism2022

    • Author(s)
      Fukui K, Takahashi T, Matsunari H, Uchikura A, Watanabe M, Nagashima H, Ishihara N, Kakuma T, Watanabe Y, Yamashita Y, Yoshino M
    • Journal Title

      J Inherit Metab Dis

      Volume: 46(6) Issue: 6 Pages: 1059-1069

    • DOI

      10.1002/jimd.12540

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Perampanel markedly improved clinical seizures in a patient with a Rett-like phenotype and 960-kb deletion on chromosome 9q34.11 including the STXBP12022

    • Author(s)
      4.Yoshida S., Amamoto M., Takahashi T., Tomita I., Yuge K., Hara M., Iwama K., Matsumoto N., Matsuishi T.
    • Journal Title

      Clin Case Rep

      Volume: in press Issue: 5 Pages: 1-7

    • DOI

      10.1002/ccr3.5811

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Optimization of Adenoviral Gene Transfer in Human Pluripotent Stem Cells2021

    • Author(s)
      Mitsui K., Takahashi T., Ide K., Matsuda E., Kosai K.
    • Journal Title

      Biochem. Biophys. Res. Commun.

      Volume: 541 Pages: 78-83

    • DOI

      10.1016/j.bbrc.2021.01.009

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Meaningful word acquisition is associated with walking ability over 10 years in Rett syndrome2020

    • Author(s)
      Saikusa T, Kawaguchi M, Tanioka T, Nabatame S, Takahashi S, Yuge K, Nagamitsu S, Takahashi T, Yamashita Y, Kobayashi Y, Hirayama C, Kakuma T, Matsuishi T, Itoh M.
    • Journal Title

      Brain Dev

      Volume: 42(10) Issue: 10 Pages: 705-712

    • DOI

      10.1016/j.braindev.2020.06.012

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Study of Sleep Disturbances In Rett Syndrome By Mecp2-Deficient Mice2022

    • Author(s)
      Kotaro Yuge, Munetsugu Hara, Tomoyuki Takahashi, Toyojiro Matsuishi, Yushiro Yamashita
    • Organizer
      17th International child Neurology Congress
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] グルタミノリシスを標的とする高アンモニア血症の新規治療戦略2022

    • Author(s)
      福井 香織、高橋 知之、松成 ひとみ、内倉 鮎子、渡邊將人、長嶋 比呂志、石原 直忠、角間 辰之、山下 裕史朗、渡邊 順子、芳野 信
    • Organizer
      125回日本小児科学会学術集会
    • Related Report
      2022 Research-status Report
  • [Presentation] レット症候群モデルマウスを用いた病態解明と治療応用への展望2021

    • Author(s)
      高橋知之
    • Organizer
      第63回日本小児神経学会学術集会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] MeCP2欠損マウスによるレット症候群の睡眠障害に関する研究2021

    • Author(s)
      弓削康太郎、高橋知之、松石豊次郎、山下裕史朗
    • Organizer
      第63回日本小児神経学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] ジメチルα-ケトグルタル酸はグルタミン酸デヒドロゲナーゼのフラックス抑制によりアンモニアを低下させる2021

    • Author(s)
      福井 香織、高橋 知之、渡邊 順子、芳野 信
    • Organizer
      第62回日本先天代謝異常学会総会
    • Related Report
      2021 Research-status Report
  • [Presentation] A NOVEL THERAPEUTIC STRATEGY FOR HYPERAMMONEMIA TARGETING GLUTAMINOLYSIS2021

    • Author(s)
      福井 香織、高橋 知之、松成 ひとみ、内倉 鮎子、長嶋 比呂志、石原 直忠、角間 辰之、山下 裕史朗、渡邊 順子、芳野 信
    • Organizer
      5th International Symposium on Urea Cycle Disorders
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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

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