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Elucidation of the pathogenesis of acute encephalitis/encephalopathy with a focus on glia

Research Project

Project/Area Number 17K10086
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Pediatrics
Research InstitutionAichi Medical University

Principal Investigator

Kurahashi Hirokazu  愛知医科大学, 医学部, 講師 (30621817)

Co-Investigator(Kenkyū-buntansha) 垣田 博樹  愛知医科大学, 医学部, 講師 (40528949)
奥村 彰久  愛知医科大学, 医学部, 教授 (60303624)
Project Period (FY) 2017-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsミクログリア / オリゴデンドロサイト / ミエリン / サイトカイン / MYRF / iNOS / 低酸素 / 神経科学
Outline of Final Research Achievements

Glia are involved in the homeostasis of the brain microenvironment. By focusing on glia, it is expected that the pathophysiology of acute encephalitis and encephalopathy can be understood from a different perspective than neuronal damage, which may lead to the development of novel therapies. In the present study, the effect of therapeutic hypothermia on microglial activation was shown to reduce neuronal damage. Cultured BV-2 microglial cells under hypothermia showed significantly reduced expression of inflammatory cytokines and iNOS, and hypothermia also suppressed BV-2 cell phagocytosis. In addition, a missense variant in the MYRF gene, which regulates gene expression in oligodendrocytes, one of the glial cells, were identified in two families with mild encephalitis/encephalopathy with a reversible splenial lesion (MERS).

Academic Significance and Societal Importance of the Research Achievements

我々の研究は、低体温療法がミクログリアの炎症反応を抑制することで神経保護に寄与している可能性を示唆している。低体温療法は、ミクログリアの活性化抑制の観点からも、急性脳炎・脳症の治療において有望なアプローチとなっている可能性がある。
MYRF(Myelin Regulatory Factor)は成熟したオリゴデンドロサイトで発現するDNA制御因子であり、MBP、PLPなどのミエリン関連遺伝子の発現に関与している。MERSにおけるMYRF遺伝子変異の同定はグリアが関与する急性脳症という新たな概念を裏付けている。これらの研究成果は、グリアに着目した急性脳炎・脳症の治療法開発に寄与するものである。

Report

(7 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (25 results)

All 2023 2022 2021 2020 2019 2018 2017

All Journal Article (17 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 17 results,  Open Access: 4 results) Presentation (8 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] A nationwide survey of human metapneumovirus-associated encephalitis/encephalopathy in Japan2023

    • Author(s)
      Mori Ayumi、kawano Yoshihiko、Hara Shinya、Numoto Shingo、Kurahashi Hirokazu、okumura Akihisa
    • Journal Title

      Brain and Development

      Volume: 45 Issue: 4 Pages: 197-204

    • DOI

      10.1016/j.braindev.2023.01.001

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Case report: Mild encephalitis with a reversible splenial lesion associated with SARS-CoV-2 infection in a patient with MYRF variant2022

    • Author(s)
      Saito Mizuho、Nakazawa Tomoyuki、Toriumi Shun、Takasu Michihiko、Yagisawa Hiromi、Murano Yayoi、Miyazaki Nao、Kurahashi Hirokazu、Okumura Akihisa、Shimizu Toshiaki
    • Journal Title

      Frontiers in Pediatrics

      Volume: 10 Pages: 971432-971432

    • DOI

      10.3389/fped.2022.971432

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Hypothermia Attenuates Neuronal Damage via Inhibition of Microglial Activation, Including Suppression of Microglial Cytokine Production and Phagocytosis2021

    • Author(s)
      Kimura Tomoka、Toriuchi Kohki、Kakita Hiroki、Tamura Tetsuya、Takeshita Satoru、Yamada Yasumasa、Aoyama Mineyoshi
    • Journal Title

      Cellular and Molecular Neurobiology

      Volume: 41 Issue: 3 Pages: 459-468

    • DOI

      10.1007/s10571-020-00860-z

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effects of l-carnitine supplementation in patients with childhood-onset epilepsy prescribed valproate2021

    • Author(s)
      Okumura Akihisa、Takagi Mizuki、Numoto Shingo、Iwayama Hideyuki、Azuma Yoshiteru、Kurahashi Hirokazu
    • Journal Title

      Epilepsy & Behavior

      Volume: 122 Pages: 108220-108220

    • DOI

      10.1016/j.yebeh.2021.108220

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Procalcitonin as a Biomarker of Unresponsiveness to Intravenous Immunoglobulin for Kawasaki Disease2020

    • Author(s)
      Nakamura Nami、Muto Taichiro、Masuda Yu、Numoto Shingo、Kodama Shunsuke、Miyamoto Ryosuke、Miyata Kenji、Hayakawa Tomohito、Mori Hiromitsu、Kuroyanagi Yoshiyuki、Akaihata Mitsuko、Iwayama Hideyuki、Kurahashi Hirokazu、Shimomura Yasuhito、Nagai Takuhito、Hori Toshinori、Agata Hiroatsu、Okumura Akihisa
    • Journal Title

      Pediatric Infectious Disease Journal

      Volume: 39 Issue: 9 Pages: 857-861

    • DOI

      10.1097/inf.0000000000002716

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] A trial of lacosamide for benign convulsions with gastroenteritis2020

    • Author(s)
      Numoto Shingo、Kurahashi Hirokazu、Iwayama Hideyuki、Okumura Akihisa
    • Journal Title

      Brain and Development

      Volume: 42 Issue: 7 Pages: 551-554

    • DOI

      10.1016/j.braindev.2020.03.006

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Splenial lesions in benign convulsions with gastroenteritis associated with rotavirus infection2019

    • Author(s)
      Ogawa Chikako、Kidokoro Hiroyuki、Ishihara Naoko、Tsuji Takeshi、Kurahashi Hirokazu、Hattori Ayako、Suzuki Motomasa、Ogaya Shunsuke、Ito Yuji、Fukasawa Tatsuya、Kubota Tetsuo、Okumura Akihisa、Saitoh Shinji、Natsume Jun
    • Journal Title

      Pediatric Neurology

      Volume: 9 Pages: 79-84

    • DOI

      10.1016/j.pediatrneurol.2019.05.002

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Delayed recognition of childhood arterial ischemic stroke2019

    • Author(s)
      Hori Ikumi、Tsuji Takeshi、Miyake Misa、Ueda Kazuto、Kataoka Erina、Suzuki Michio、Kobayashi Satoru、Kurahashi Hirokazu、Takahashi Yoshiyuki、Okumura Akihisa、Yoshikawa Tetsushi、Saitoh Shinji、Natsume Jun
    • Journal Title

      Pediatrics International

      Volume: 61 Issue: 9 Pages: 895-903

    • DOI

      10.1111/ped.13966

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Genomic backgrounds of Japanese patients with undiagnosed neurodevelopmental disorders2019

    • Author(s)
      Yamamoto Toshiyuki、Imaizumi Taichi、Yamamoto-Shimojima Keiko、Kurahashi Hirokazuら,
    • Journal Title

      Brain and Development

      Volume: 41 Issue: 9 Pages: 776-782

    • DOI

      10.1016/j.braindev.2019.05.007

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] PRRT2 mutations in Japanese patients with benign infantile epilepsy and paroxysmal kinesigenic dyskinesia2019

    • Author(s)
      Okumura Akihisa、Shimojima Keiko、Kurahashi Hirokazuら.
    • Journal Title

      Seizure

      Volume: 71 Pages: 1-5

    • DOI

      10.1016/j.seizure.2019.05.017

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Serum carnitine levels of children with epilepsy: Related factors including valproate2019

    • Author(s)
      Okumura Akihisa、Kurahashi Hirokazu、Iwayama Hideyuki、Numoto Shingo
    • Journal Title

      Brain and Development

      Volume: 41 Issue: 6 Pages: 516-521

    • DOI

      10.1016/j.braindev.2019.02.010

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A nationwide survey of norovirus-associated encephalitis/encephalopathy in Japan2019

    • Author(s)
      Shima Taiki、Okumura Akihisa、Kurahashi Hirokazu、Numoto Shingo、Abe Shinpei、Ikeno Mitsuru、Shimizu Toshiaki
    • Journal Title

      Brain and Development

      Volume: 41 Issue: 3 Pages: 263-270

    • DOI

      10.1016/j.braindev.2018.11.001

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] A patient with a GNAO1 mutation with decreased spontaneous movements, hypotonia, and dystonic features2018

    • Author(s)
      Okumura Akihisa、Maruyama Koichi、Shibata Mami、Kurahashi Hirokazu、Ishii Atsushi、Numoto Shingo、Hirose Shinichi、Kawai Tomoko、Iso Manami、Kataoka Shinsuke、Okuno Yusuke、Muramatsu Hideki、Kojima Seiji
    • Journal Title

      Brain and Development

      Volume: 40 Issue: 10 Pages: 926-930

    • DOI

      10.1016/j.braindev.2018.06.005

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] MYRF is associated with encephalopathy with reversible myelin vacuolization2018

    • Author(s)
      Kurahashi Hirokazu、Azuma Yoshiteru、Masuda Akio、Okuno Tatsuya、Nakahara Eri、Imamura Takuji、Saitoh Makiko、Mizuguchi Masashi、Shimizu Toshiaki、Ohno Kinji、Okumura Akihisa
    • Journal Title

      Annals of Neurology

      Volume: 83 Issue: 1 Pages: 98-106

    • DOI

      10.1002/ana.25125

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Loss-of-function and gain-of-function mutations in PPP3CA cause two distinct disorders2018

    • Author(s)
      Mizuguchi Takeshi、Kurahashi Hirokazu、et al.
    • Journal Title

      Human Molecular Genetics

      Volume: 27 Issue: 8 Pages: 1421-1433

    • DOI

      10.1093/hmg/ddy052

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Gastric perforation and critical illness polyneuropathy after steroid treatment in a patient with encephalitis/encephalopathy with transient splenial lesion2017

    • Author(s)
      Ikeno Mitsuru、Abe Shinpei、Kurahashi Hirokazu、Takasu Michihiko、Shimizu Toshiaki、Okumura Akihisa
    • Journal Title

      Brain and Development

      Volume: 39 Issue: 4 Pages: 356-360

    • DOI

      10.1016/j.braindev.2016.10.014

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Characteristics of epilepsy in patients with Kabuki syndrome with KMT2D mutations2017

    • Author(s)
      Kurahashi Naoko、Miyake Noriko、Mizuno Seiji、Koshimizu Eriko、Kurahashi Hirokazu、Yamada Keitaro、Natsume Jun、Aoki Yusuke、Nakamura Miho、Taniai Hiroko、Maki Yuki、Abe-Hatano Chihiro、Matsumoto Naomichi、Maruyama Koichi
    • Journal Title

      Brain and Development

      Volume: 39 Issue: 8 Pages: 672-677

    • DOI

      10.1016/j.braindev.2017.03.025

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] 日本におけるビタミンB6依存性てんかんの実態2022

    • Author(s)
      倉橋宏和、高木みずき、沼本真吾、岩山秀之、東慶輝、奥村彰久、秋山倫之、白石秀明、本田涼子
    • Organizer
      第64回日本小児神経学会学術集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 当院のてんかん外来における遺伝学的解析の有用性2021

    • Author(s)
      倉橋宏和、沼本真吾、東慶輝、岩山秀之、奥村彰久、石井敦士、廣瀬伸一、松本直通、水口 剛、土田奈緒美、瀧澤まりな、内山由理、山本俊至、高橋悟
    • Organizer
      第63回日本小児神経学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] A case of developmental epileptic encephalopathy with PPP3CA mutation2020

    • Author(s)
      Hirokazu Kurahashi, Shingo Numoto, Akihisa Okumura, Tsuyoshi Mizuguchi, Naomi Tsuchida, Naomichi Matsumoto
    • Organizer
      The 21st Annual Meeting of the Infantile Seizure Society (ISS)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Weekly ACTH療法における甲状腺および副腎皮質機能の推移2020

    • Author(s)
      倉橋 宏和、沼本 信吾、岩山 秀之、奥村 彰久
    • Organizer
      第62回日本小児神経学会学術集会
    • Related Report
      2020 Research-status Report
  • [Presentation] 可逆性脳梁膨大部病変を伴う軽症脳症におけるMYRF関連遺伝子の解析2019

    • Author(s)
      倉橋 宏和、沼本 真吾、奥村 彰久、加藤 耕治、荻 朋男、遠山 美穂、星野 愛、水口 雅
    • Organizer
      第61回日本小児神経学会学術集会
    • Related Report
      2019 Research-status Report
  • [Presentation] Dravet症候群における発熱時および平熱時の免疫学的反応の解析2019

    • Author(s)
      倉橋 宏和、沼本 真吾、奥村 彰久、石井 敦士、廣瀬 伸一
    • Organizer
      第53回 日本てんかん学会学術集会
    • Related Report
      2019 Research-status Report
  • [Presentation] 脳梁膨大部病変を有する軽症脳症におけるMYRF遺伝子バリアント2018

    • Author(s)
      倉橋 宏和、東 慶輝、増田 章男、奥野 達矢、中原 絵里、 今村 卓司、斎藤 真木子、水口 雅、大野 欣司、奥村彰久
    • Organizer
      第60回日本小児神経学会
    • Related Report
      2018 Research-status Report
  • [Presentation] SCN1A遺伝子変異症例における免疫学的反応の解析2018

    • Author(s)
      倉橋 宏和
    • Organizer
      第52回日本てんかん学会学術集会
    • Related Report
      2018 Research-status Report
    • Invited

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Published: 2017-04-28   Modified: 2024-01-30  

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