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Construction and expression of type 1 ryanodine receptor genetic mutants for genetic diagnosis of malignant hyperthermia

Research Project

Project/Area Number 19K09383
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 55050:Anesthesiology-related
Research InstitutionShowa University

Principal Investigator

Oguchi Katsuji  昭和大学, 医学部, 名誉教授 (50129821)

Co-Investigator(Kenkyū-buntansha) 小山田 英人  昭和大学, 医学部, 兼任講師 (50266160)
Project Period (FY) 2019-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2023: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywords悪性高熱症 / 1型リアノジン受容体 / RyR1 / 遺伝子診断 / 遺伝子変異体 / 変異体 / リアノジン受容体 / malignant hyperthermia / ryanodine receptor / cDNAカセット / cDNA cassette / カルシウムイオン / calcium ion / malignant hyperthe
Outline of Research at the Start

悪性高熱症(malignant hyperthermia、MH)は、揮発性の全身麻酔薬が引き金となる、骨格筋の拘縮を伴って高熱を発する優性遺伝形質の疾患である。発症初期に速やかな診断が必要であり、その後の処置が不適切であるとショック状態を引き起こし、現在でも高率(約15%)で死の転帰をとる。ヒトMH疾患の症例報告に、リアノジン受容体1型(RyR1)をコードする遺伝子上に200ヶ所以上の変異部位が見いだされている。本研究では、未だに増え続けるMH変異部位に対応した全てのMH型RyR1変異体を作製して、強制発現させた細胞株を樹立して、MHの遺伝子診断の実験的な根拠を提示する。

Outline of Final Research Achievements

In cases of malignant hyperthermia (MH) patients, there are more than several hundred of the MH-type RyR1 mutation sites on the gene encoding the ryanodine receptor type 1 (RyR1, Ca2+ release channel). However, only a few experimental evidences clearly indicate the association with MH disease. For this reason, it has not yet been applied to genetic diagnosis. In this study, we newly constructed 105 cDNA sequences encoding RyR1 variants with unknown functional changes. Going forward, it is expected that cultured cells expressing these variants will be established, and their intracellular Ca2+ dynamics will be analyzed in detail to clarify whether they are associated with MH disease.

Academic Significance and Societal Importance of the Research Achievements

MHは揮発性全身麻酔薬が引き金で全身の骨格筋拘縮を伴った高熱を発する非常に稀な遺伝性疾患であるが、発症初期の処置が不適切な場合には未だに高率に死の転帰をとる(致死率 11.3%:2023年)。現在の術前確定診断法には、主に筋生検を用いた侵襲的な検査法があるが、ほとんど普及していない。このため非侵襲的な血液を用いた遺伝子診断法の開発が強く望まれている。本研究で構築された新規なRyR1変異体を発現する培養細胞を用いて、各々の変異体におけるCa2+放出機構における薬物感受性の変化やその他の機能的な変化の有無が明確ににされれば、遺伝子検索部位の根拠となり、MHの術前の遺伝子診断法の開発に繋がる。

Report

(7 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (10 results)

All 2024 2022 2020 2019 Other

All Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (4 results) Remarks (3 results)

  • [Journal Article] Dual role of the S5 segment in type 1 ryanodine receptor channel gating2024

    • Author(s)
      Murayama Takashi、Otori Yuya、Kurebayashi Nagomi、Yamazawa Toshiko、Oyamada Hideto、Sakurai Takashi、Ogawa Haruo
    • Journal Title

      Communications Biology

      Volume: 7

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Heat-hypersensitive mutants of ryanodine receptor type 1 revealed by microscopic heating2022

    • Author(s)
      Oyama Kotaro、Zeeb Vadim、Yamazawa Toshiko、Kurebayashi Nagomi、Kobirumaki-Shimozawa Fuyu、Murayama Takashi、Oyamada Hideto、Noguchi Satoru、Inoue Takayoshi、Inoue Yukiko U.、Nishino Ichizo、Harada Yoshie、Fukuda Norio、Ishiwata Shin’ichi、Suzuki Madoka
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 119 Issue: 32

    • DOI

      10.1073/pnas.2201286119

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Insights into channel modulation mechanism of RYR1 mutants using Ca2+ imaging and molecular dynamics2020

    • Author(s)
      Yamazawa Toshiko、Ogawa Haruo、Murayama Takashi、Yamaguchi Maki、Oyamada Hideto、Suzuki Junji、Kurebayashi Nagomi、Kanemaru Kazunori、Oguchi Katsuji、Sakurai Takashi、Iino Masamitsu
    • Journal Title

      The Journal of General Physiology

      Volume: 152 Issue: 1 Pages: 0-0

    • DOI

      10.1085/jgp.201812235

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Strategic narrowing the variant sites of type 1 ryanodine receptor gene and the refinement construction methods to establish pre-operative genetic diagnosis of malignant hyperthermia2024

    • Author(s)
      小山田英人、木内祐二、小口勝司
    • Organizer
      第130回日本解剖学会/第102回日本生理学会/第98回日本薬理学会合同大会
    • Related Report
      2024 Annual Research Report
  • [Presentation] 悪性高熱症診断の遺伝子スクリーニング検査を目指した1型リアノジン受容体変異体cDNAの迅速かつ簡便な構築法2024

    • Author(s)
      小山田英人、木内祐二、小口勝司
    • Organizer
      第150回日本薬理学会 関東部会
    • Related Report
      2024 Annual Research Report
  • [Presentation] Fast and easy construction method of ryanodine receptor mutants aiming at genetic screening of malignant hyperthermia diagnosis2020

    • Author(s)
      Oyamada H, Nakano M, Hayashi T, Ubukata Y, Makino T, Tanaka M, Kikuchi T, Oguchi K, Kiuchi Y.
    • Organizer
      第92回日本薬理学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] Construction and integration of the All-in-One type single double-conditional shRNA expression vectors for spatio-temporal gene and/or cell targeting.2019

    • Author(s)
      Oyamada H, Ao Y, Kudo Y, Matsuoka T, Okamoto R, Murayama T, Yamazawa T, Kakizawa S, Oguchi T, Kimura MA, Yasumoto T, Mori Y, Tsuji M, Oguchi K, Kiuchi Y.
    • Organizer
      第42回日本神経科学大会( 共同開催:第62回日本神経化学会大会)
    • Related Report
      2019 Research-status Report
  • [Remarks] 熱中症の発症予測・メカニズム解明にも寄与 : 悪性高熱症の熱産生暴走メカニズム(大阪大)

    • URL

      https://resou.osaka-u.ac.jp/ja/research/2022/20220808_2

    • Related Report
      2022 Research-status Report
  • [Remarks] 熱中症の発症予測・メカニズム解明にも寄与:悪性高熱症の熱産生暴走、、、(量子科学技術開発研究機構)

    • URL

      https://www.qst.go.jp/site/press/20220808.html

    • Related Report
      2022 Research-status Report
  • [Remarks] 熱中症の発症予測・メカニズム解明にも寄与 : 悪性高熱症の熱産生暴走メカニズム(東京慈恵会医科大学)

    • URL

      http://www.jikei.ac.jp/news/press_release_20220808.html

    • Related Report
      2022 Research-status Report

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Published: 2019-04-18   Modified: 2026-01-16  

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