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Pathomechanisms of developmental epileptic encephalopathy caused by CDKL5/CDKL3 mutations and development of the gene therapy

Research Project

Project/Area Number 18K07784
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 InstitutionThe University of Tokyo

Principal Investigator

Tanaka Teruyuki  東京大学, 大学院医学系研究科(医学部), 准教授 (10246647)

Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
KeywordsCDKL5 / てんかん / 精神運動発達遅滞 / 遺伝子治療 / アデノ随伴ウイルス / ノックインマウス / ノックアウトマウス / アデノ随伴ウイルスベクター / 神経発達障害 / CDKL3
Outline of Final Research Achievements

Several AAV vectors expressing hCDKL5 driven by the SynI promoter were generated to assess the efficiency of CDKL5 gene replacement by systemic AAV administration into the brains of Cdkl5 KO mice.
Cdkl5 kinase-dead knock-in mice were generated to model the CDKL5 missense mutations resulting in deletion of CDKL5 kinase activity. We identified abnormal phenotypes of the kinase-dead knock-in mice by comprehensive behavioral testing, impaired functional connectivity in the cerebral cortex by in vivo wide-range calcium imaging, and abnormalities in the gamma wave power spectrum by electroencephalography (EEG) analysis.
As a proof-of-concept, we generated Cdkl5 K42R(kinase-dead)-to-WT FLEx knock-in mice, a mouse model that allows CDKL5 gene replacement at any time by administration of tamoxifen.

Academic Significance and Societal Importance of the Research Achievements

CDKL5欠損症に対するCDKL5遺伝子補充療法の前臨床試験をCdkl5 KOマウスを用いて行った。効果的な遺伝子補充に適したアデノ随伴ウイルス (AAV) ベクターを得るため数種類のAAVベクターを作製して効果を比較検討した。CDKL5遺伝子の病因変異のうちの、キナーゼ活性のみ欠失したCDKL5を発現するタイプのモデル動物として、CDKL5活性欠失マウスを作製し、その表現型を網羅的行動解析、in vivo大脳皮質広域カルシウムイメージング、脳波解析などにより多次元的に同定した。更に遺伝子補充療法の効果の概念実証のために、任意の時点で正常型マウスに変換可能なCdkl5機能喪失マウスを作製した。

Report

(4 results)
  • 2021 Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (16 results)

All 2021 2020 2019 2018

All Journal Article (2 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (14 results) (of which Int'l Joint Research: 5 results,  Invited: 3 results)

  • [Journal Article] 発達障害の生物学的背景2019

    • Author(s)
      田中輝幸
    • Journal Title

      Modern Physician

      Volume: 39 Pages: 1106-1108

    • Related Report
      2019 Research-status Report
  • [Journal Article] Comprehensive behavioral analysis of the Cdkl5 knockout mice revealed significant enhancement in anxiety- and fear-related behaviors and impairment in both acquisition and long-term retention of spatial reference memory2018

    • Author(s)
      Okuda Kosuke、Takao Keizo、Watanabe Aya、Miyakawa Tsuyoshi、Mizuguchi Masashi、Tanaka Teruyuki
    • Journal Title

      PLOS ONE

      Volume: 13 Issue: 4 Pages: e0196587-e0196587

    • DOI

      10.1371/journal.pone.0196587

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] In vivo wide-field Ca2+ imaging of the cortical spontaneous activity in the Cdkl5 mutant mice reveals altered functional connectivity upon the loss-of-function of CDKL52021

    • Author(s)
      Teruyuki Tanaka, Toshiki Nomura, Tomonari Murakami, Kumiko Saitou, Kenichi Ohki
    • Organizer
      Society for Neuroscience Global Connectome 2021
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Evaluating the cortical functional connectivity in Cdkl5 mutant mice by in vivo wide-field Ca2+ imaging2020

    • Author(s)
      Teruyuki Tanaka, Toshiki Nomura, Tomonari Murakami, Kumiko Saitou, Kenichi Ohki, Masashi Mizuguchi
    • Organizer
      第62回日本小児神経学会総会
    • Related Report
      2020 Research-status Report
  • [Presentation] In vivo wide-field Ca2+ imaging of the cortical spontaneous activity in the Cdkl5 mutant mice reveals altered functional connectivity upon the loss-of-function of CDKL52020

    • Author(s)
      Toshiki Nomura, Tomonari Murakami, Kumiko Saitou, Kenichi Ohki, Teruyuki Tanaka
    • Organizer
      第43回日本神経科学大会
    • Related Report
      2020 Research-status Report
  • [Presentation] In vivo大脳皮質広域カルシウムイメージングによる CDKL5機能欠損マウス脳における機能的結合性の変化の同定2020

    • Author(s)
      田中輝幸、野村俊貴、村上知成、斉藤久美子、大木研一
    • Organizer
      第50回日本神経精神薬理学会年会・42回日本生物学的精神医学会 年会・第4回日本精神薬学会総会・学術集会
    • Related Report
      2020 Research-status Report
  • [Presentation] Assessing functional connectivity in the brain upon the loss of CDKL5 by the in vivo wide-field Ca2+ imaging of cerebral cortices of the Cdkl5 mutant mice, and by the resting-state fMRI analysis of CDD patients2020

    • Author(s)
      Teruyuki Tanaka, Toshiki Nomura
    • Organizer
      2020 CDKL5 Forum
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Pre-clinical study of the CDKL5 gene replacement therapy tested on the Cdkl5 knockout mouse2019

    • Author(s)
      Teruyuki Tanaka, Elizabeth Zheng, Shin-ichi Muramatsu, Masashi Mizuguchi1
    • Organizer
      第61回日本小児神経学会学術集会
    • Related Report
      2019 Research-status Report
  • [Presentation] CDKL5欠損症の病態機序と治療法の解明を目指す私たちの研究2019

    • Author(s)
      田中輝幸
    • Organizer
      第12回全国てんかんリハビリテーション研究会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Can the gene replacement rescue the synaptic and behavioral phenotypes of mice deficient in Cyclin-dependent kinase-like 5 (CDKL5)?2019

    • Author(s)
      Teruyuki Tanaka, Elizabeth Zheng, Shin-ichi Muramatsu, Masashi Mizuguchi
    • Organizer
      第42回日本神経科学大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Dissecting the Cdkl5 mutant mice at the macroscopic, microscopic, and mesoscopic levels2019

    • Author(s)
      Teruyuki Tanaka
    • Organizer
      2019 CDKL5 Workshop in Asia
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] CDKL5 controls synaptic localization of GluN2B-NMDA receptors and regulates seizure susceptibility2018

    • Author(s)
      田中輝幸, 奥田耕助, 小林静香, 深谷昌弘, 渡邉紀, 村上拓冬, 萩原舞, 阪上洋行, 真鍋俊也, 水口雅
    • Organizer
      第60回日本小児神経学会学術集会
    • Related Report
      2018 Research-status Report
  • [Presentation] Comprehensive behavioral analysis of the Cdkl5 knockout mice revealed significant enhancement in anxiety- and fear-related behaviors, unique alteration in depressive-like behaviors and social interaction, and impairment in both acquisition and long-term retention of spatial reference memory2018

    • Author(s)
      田中輝幸, 奥田耕助, 高雄 啓三, 渡邉 紀, 水口 雅, 宮川 剛
    • Organizer
      第41回日本神経科学大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Cdkl5 KOマウスのシナプス・行動学的解析:難治性てんかんを伴う神経発達障害CDKL5欠損症の病態機序と治療法の解明をめざして2018

    • Author(s)
      田中輝幸
    • Organizer
      立命館大学薬学部セミナー
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] CDKL5 controls postsynaptic localization of GluN2B-containing NMDA receptors in the hippocampus, and regulates seizure susceptibility, emotional behaviors, and memory2018

    • Author(s)
      Teruyuki Tanaka, Kosuke Okuda, Shizuka Kobayashi, Takuto Murakami, Masahiro Fukaya, Keizo Takao, Aya Watanabe, Mai Hagiwara, Hiroyuki Sakagami, Masashi Mizuguchi, Tsuyoshi Miyakawa, Toshiya Manabe
    • Organizer
      Cold Spring Harbor Asia - Latest Advances in Development & Function of Neuronal Circuits -
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Comprehensive behavioral analysis of the Cdkl5 KO mice revealed significant enhancement in anxiety- and fear-related behaviors, alteration in depressive-like behaviors and social interaction, and impairment in both acquisition and long-term retention of spatial reference memory2018

    • Author(s)
      Teruyuki Tanaka, Kosuke Okuda, Keizo Takao, Aya Watanabe, Masashi Mizuguchi, Tsuyoshi Miyakawa
    • Organizer
      2018 CDKL5 Forum in London
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

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Published: 2018-04-23   Modified: 2023-03-23  

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