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Creation of therapeutic agent for Rett syndrome (CDKL5 deficiency disorder) using Kampo medicine

Research Project

Project/Area Number 19K08264
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 InstitutionRitsumeikan University

Principal Investigator

Inazu Tetsuya  立命館大学, 薬学部, 教授 (00242587)

Co-Investigator(Kenkyū-buntansha) 田中 輝幸  東京大学, 大学院医学系研究科(医学部), 准教授 (10246647)
片山 将一  立命館大学, 薬学部, 助教 (60779049)
Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
KeywordsCDKL5 / 抑肝散 / 一味抜き成分 / 神経分化誘導作用 / Cdkl5ノックアウトマウス / cdkl5ノックアウトマウス / 神経分化 / 細胞内情報伝達 / レット症候群 / 漢方薬
Outline of Research at the Start

Cyclin-dependent kinase-like 5 (CDKL5)はタンパク質リン酸化酵素であり、その遺伝子の変異は精神発達遅延、てんかん等を伴う重篤な疾患であるレット症候群を発症させることが知られている。しかし、有効な治療法は存在しない。本研究では、日本古来より用いられる漢方薬である「抑肝散(ヨクカンサン)」を用い、ヒトiPS細胞、Cdkl5ノックアウトマウス(KO)等における抑肝散の効果について検証し、最終的に有効成分の単離を実施し、レット症候群(特にCDKL5 欠失症(CDKL5 deficiency disorder))の治療薬創製を最終的な目標と定める。

Outline of Final Research Achievements

Yokukansan (YKS) is a Japanese traditional medicine called “Kampo medicine”. YKS consists of seven kinds of crude drugs: Atractylodes Lancea Rhizome, Poria Sclerotium, Cnidium Rhizome, Uncaria Hook, Japanese Angelica Root, Bupleurum Root and Glycyrrhiza. We were able to mix, extract, and dry a total of 7 types of extracts in YKS. We found that the extracts without Bupleurum Root and Glycyrrhiza reduced the efficiency of neuronal differentiation to about half. Finally, it was found that the neuronal differentiation-inducing action of YKS is at least partially mediated by glycyrrhizin and GSK3b signaling pathway.
Furthermore, we evaluated the effects of chronic treatment of YKS on Cdkl5 knockout (KO) mice. YKS administration for 3 months showed increased body weight, increased exploration in the brightly lit box in the light/dark transition test, and increased freezing in the fear conditioning test, suggesting modifying effects of YKS to the emotion and memory of Cdkl5 KO mice.

Academic Significance and Societal Importance of the Research Achievements

レット症候群は、精神発達遅滞、てんかん等が有する稀少疾患でかつ現在に至るまで根本的な治療法が見出されていない難病である。本疾患(特にCDKL5欠失症)に対して、治療法やその候補薬を見出すことは社会的に意義深い。本研究で、日本古来の生薬である抑肝散が、細胞レベルで神経分化機能を促進し、また個体レベルでも情動と記憶機能に対する抑肝散の修飾効果を見出した。すなわち抑肝散は、CDKL5欠失症の症状改善のための治療薬の一つになりうる可能性があることを見出した。

Report

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

    (26 results)

All 2023 2022 2021 2020 2019

All Journal Article (9 results) (of which Peer Reviewed: 9 results,  Open Access: 8 results) Presentation (17 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results)

  • [Journal Article] Total colectomy for poorly controlled hypokalemia due to Gitelman syndrome2023

    • Author(s)
      Tetsuya Kawahara, Tetsuya Inazu, Shingo Ishida
    • Journal Title

      BMJ Case Reports

      Volume: 16(2):e252916. Issue: 2 Pages: e252916-e252916

    • DOI

      10.1136/bcr-2022-252916

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] HDAC8 is implicated in embryoid body formation via canonical Hedgehog signaling and regulates neuronal differentiation2022

    • Author(s)
      Atsushi Morii, Tetsuya Inazu
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 629 Pages: 78-85

    • DOI

      10.1016/j.bbrc.2022.08.068

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Comprehensive in silico functional prediction analysis of CDKL5 by single amino acid substitution in the catalytic domain2022

    • Author(s)
      Yuri Yoshimura , Atsushi Morii, Yuuki Fujino, Marina Nagase, Arisa Kitano, Shiho Ueno, Kyoka Takeuchi, Riko Yamashita, Tetsuya Inazu
    • Journal Title

      Int. J. Mol. Sci.

      Volume: 23(20) Issue: 20 Pages: 12281-12281

    • DOI

      10.3390/ijms232012281

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effect of active vitamin D treatment on development of type 2 diabetes: DPVD randomised controlled trial in Japanese population2022

    • Author(s)
      Tetsuya Kawahara, Gen Suzuki, Shoichi Mizuno, Tetsuya Inazu, Fumiyoshi Kasagi, Chie Kawahara, Yosuke Okada, Yoshiya Tanaka
    • Journal Title

      BMJ

      Volume: 377 Pages: e066222-e066222

    • DOI

      10.1136/bmj-2021-066222

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Zinc finger protein 483 (ZNF483) regulates neuronal differentiation and methyl-CpG-binding protein 2 (MeCP2) intracellular localization2021

    • Author(s)
      Yasui Gen、Katayama Syouichi、Kubota Yukihiko、Takatsuka Hisashi、Ito Masahiro、Inazu Tetsuya
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 568 Pages: 68-75

    • DOI

      10.1016/j.bbrc.2021.06.066

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Establishment of a Simple Method for Inducing Neuronal Differentiation of P19 EC Cells without Embryoid Body Formation and Analysis of the Role of Histone Deacetylase 8 Activity in This Differentiation2020

    • Author(s)
      Atsushi Morii, Syouichi Katayama, Tetsuya Inazu
    • Journal Title

      Biological and Pharmaceutical Bulletin

      Volume: 43 Issue: 7 Pages: 1096-1103

    • DOI

      10.1248/bpb.b20-00091

    • NAID

      130007867918

    • ISSN
      0918-6158, 1347-5215
    • Year and Date
      2020-07-01
    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Cyclin-dependent kinase-like 5 (CDKL5): Possible cellular signaling targets and involvement in CDKL5 deficiency disorder2020

    • Author(s)
      Syouichi Katayama, Noriyuki Sueyoshi, Tetsuya Inazu, Isamu Kameshita
    • Journal Title

      Neural Plasticity

      Volume: volume 2020 Pages: 6970190-6970190

    • DOI

      10.1155/2020/6970190

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Yokukansan, a Kampo medicine, enhances the level of neuronal lineage markers in differentiated P19 embryonic carcinoma cells2019

    • Author(s)
      Fukui Makoto、Katayama Syouichi、Ikeya Yukinobu、Inazu Tetsuya
    • Journal Title

      Heliyon

      Volume: 5 Issue: 10 Pages: e02662-e02662

    • DOI

      10.1016/j.heliyon.2019.e02662

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] In Silico Study of Rett Syndrome Treatment-Related Genes, MECP2, CDKL5, and FOXG1, by Evolutionary Classification and Disordered Region Assessment2019

    • Author(s)
      Fahmi Muhamad、Yasui Gen、Seki Kaito、Katayama Syouichi、Kaneko-Kawano Takako、Inazu Tetsuya、Kubota Yukihiko、Ito Masahiro
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 20 Issue: 22 Pages: 5593-5593

    • DOI

      10.3390/ijms20225593

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] P19細胞における神経分化過程でのhistone deacetylase 8の機能解析2023

    • Author(s)
      森井 篤、稲津哲也
    • Organizer
      日本薬学143年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] レット症候群原因遺伝子 CDKL5 の触媒部位内1アミノ酸置換による網羅的 in silico 機能予測解析2022

    • Author(s)
      吉村 優里、森井 篤、藤野 優希、武内 杏夏、北野 有砂、山下 莉子、上野 支帆、稲津 哲也
    • Organizer
      第45回日本分子生物学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] レット症候群原因遺伝子 CDKL5 の触媒部位内1アミノ酸置換による網羅的 in silico 機能予測解析2022

    • Author(s)
      吉村 優里、森井 篤、藤野 優希、武内 杏夏、北野 有砂、山下 莉子、上野 支帆、稲津 哲也
    • Organizer
      国際稀少疾患シンポジウム 2022 at Ritsumeikan
    • Related Report
      2022 Annual Research Report
  • [Presentation] CDKL5 ノックインマウスの行動解析2022

    • Author(s)
      武内 杏夏、鎌田雅之、稲津 哲也
    • Organizer
      国際稀少疾患シンポジウム 2022 at Ritsumeikan
    • Related Report
      2022 Annual Research Report
  • [Presentation] レット症候群原因遺伝子CDKL5の触媒部位内1アミノ酸置換による網羅 的in silico 機能予測解析と臨床報告例との相関2022

    • Author(s)
      吉村 優里、藤野 優希、森井 篤、武内 杏夏、北野 有砂、山下 莉子、上野 支帆、Muhamad Fahmi、伊藤 將弘、稲津 哲也
    • Organizer
      日本薬学会 第142年会(名古屋)
    • Related Report
      2021 Research-status Report
  • [Presentation] Yokukansan, a Japanese traditional medicine, enhances the level of neuronal lineage markers in differentiated wild and cdkl5 knockout P19 embryonic carcinoma cells2020

    • Author(s)
      Tetsuya Inazu, Makoto Fukui, Sakino Iwata, Yukinobu Ikeya, Syouichi Katayama
    • Organizer
      CDKL5 Forum 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Phf8ノックアウトP19胚性腫瘍細胞株を用いたPHF8の機能解析2020

    • Author(s)
      土井秀介、森井篤、片山将一、稲津哲也
    • Organizer
      第70回 日本薬学会関西支部総会
    • Related Report
      2020 Research-status Report
  • [Presentation] HDAC8の欠損は神経分化不全を導く2020

    • Author(s)
      森井篤、片山将一、稲津哲也
    • Organizer
      第70回 日本薬学会関西支部総会
    • Related Report
      2020 Research-status Report
  • [Presentation] P19EC細胞における「一味抜き抑肝散」の神経分化への効果検討2020

    • Author(s)
      岩田彩生乃、片山将一、池谷幸信、稲津哲也
    • Organizer
      第70回 日本薬学会関西支部総会
    • Related Report
      2020 Research-status Report
  • [Presentation] ドッキングシュミレーションによるCyclin-dependent kinase-like 5の基質タンパク質同定2020

    • Author(s)
      高原 亜邪、片山将一、河野貴子、稲津哲也、菊地武司
    • Organizer
      第58回 日本生物物理学会年会
    • Related Report
      2020 Research-status Report
  • [Presentation] Phf8ノックアウトP19胚性腫瘍細胞株の樹立とその解析2020

    • Author(s)
      土井秀介、森井篤、片山将一、稲津哲也
    • Organizer
      第43回 日本分子生物学会年会 2020/12/3
    • Related Report
      2020 Research-status Report
  • [Presentation] P19細胞における神経分化過程でのHDAC8の機能解析2020

    • Author(s)
      森井篤、片山将一、稲津哲也
    • Organizer
      日本薬学会 第140年会(京都)
    • Related Report
      2019 Research-status Report
  • [Presentation] A novel CDKL5 mutation in an atypical Rett syndrome patient and development a convenient method for detecting CDKL5 activity2019

    • Author(s)
      Syouichi Katayama, Tetsuya Inazu
    • Organizer
      CDKL5 Workshop in Asia
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Yokukansan, a Kampo medicine, enhances the level of neuronal lineage markers in differentiated P19 embryonic carcinoma cells2019

    • Author(s)
      Syouichi Katayama, Makoto Fukui, Sayaka Suzuki , Yukinobu Ikeya , Tetsuya Inazu
    • Organizer
      CDKL5 Workshop in Asia
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Expression analysis of Rett syndrome-related genetic factors, e.g. CDKL5, in HDAC8 knockout P19 cells2019

    • Author(s)
      Atsushi Morii, Mako Saito, Syouichi Katayama, Tetsuya Inazu
    • Organizer
      CDKL5 Workshop in Asia
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Hdac8 KO P19細胞におけるRett症候群関連因子の発現変動とその解析2019

    • Author(s)
      森井篤、片山将一、斎藤磨子、土井秀介、稲津哲也
    • Organizer
      第69回 日本薬学会関西支部総会
    • Related Report
      2019 Research-status Report
  • [Presentation] PDGFとCDKL5はNeuro2a細胞の神経突起伸長を制御する2019

    • Author(s)
      南光貴裕、坂口逸紀、土井秀介、森井篤、片山将一、稲津哲也
    • Organizer
      第69回 日本薬学会関西支部総会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2024-01-30  

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