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Analysis on the regulation of the KCC2 expression after radiation

Research Project

Project/Area Number 19K19170
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 57060:Surgical dentistry-related
Research InstitutionKagoshima University

Principal Investigator

Igarashi Kento  鹿児島大学, 医歯学域歯学系, 助教 (00822876)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
KeywordsKCC2 / 放射線 / 初代培養 / ライブセルイメージング / 動物行動解析 / 放射線照射 / 培養細胞 / 酸化ストレス / 初代培養神経細胞 / Fluo-4 / 新奇物体認識試験 / GABA / 認知
Outline of Research at the Start

K+-Cl-トランスポーターであるKCC2は、神経細胞内のCl-イオン濃度を調節して正常な神経活動を保持している。本研究ではX線やガンマ線を照射した神経細胞の分子生物学的解析、さらにマウスを用いた行動学的解析を実施する。これら解析から放射線治療後の神経障害を低減する治療の新たな標的としてのKCC2の重要性を検証することを目的としている。

Outline of Final Research Achievements

While radiation therapy is one of the effective treatments for brain tumor, it may be accompanied by deterioration of brain function. Although efforts have been made to reduce the dose per dose and irradiate in multiple doses, there are still many unclear points about what kind of functional changes will occur in the surviving neurons. In this study, we focused on KCC2, a potassium-chloride ion co-transport protein that exports chloride ion concentration from intracellular to extracellular, and found that the expression of KCC2 decreased in mouse neurons after irradiation. clarified. Furthermore, administration of oxytocin after irradiation promoted the expression of KCC2, indicating that it is one of the therapeutic drug candidates useful for protecting cognitive function during radiotherapy.

Academic Significance and Societal Importance of the Research Achievements

放射線治療は脳腫瘍の治療に有効な手段の一つである一方で正常な神経細胞にも影響を及ぼす恐れがあり、とくに若い患者ほど影響が顕著になるとされている。本課題では生後3-4週の幼若マウスに対して1.5Gyの線量を3日間繰り返して照射し、認知行動の低下とK-Cl共輸送タンパク質であるKCC2の発現低下を見出した。照射後にオキシトシンを投与したマウスにおいては認知行動の低下とKCC2の発現低下は見られなかった。オキシトシンは家族やペットとのスキンシップなど日常生活でも増加するとされており、本課題で得られた知見は、より安全な応用的治療開発に向けて役立てられるのではないかと期待される。

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

    (12 results)

All 2022 2021 2019

All Journal Article (2 results) (of which Peer Reviewed: 1 results) Presentation (10 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Neuroprotective effect of oxytocin on cognitive dysfunction, DNA damage, and intracellular chloride disturbance in young mice after cranial irradiation2022

    • Author(s)
      Igarashi Kento、Iwai Haruki、Tanaka Koh-ichi、Kuwahara Yoshikazu、Kitanaka Junichi、Kitanaka Nobue、Kurimasa Akihiro、Tomita Kazuo、Sato Tomoaki
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 612 Pages: 1-7

    • DOI

      10.1016/j.bbrc.2022.04.099

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Kamishoyosan (a Japanese traditional herbal formula), which effectively reduces the aggressive biting behavior of male and female mice, and potential regulation through increase of Tph1, Tph2, and Esr2 mRNA levels2021

    • Author(s)
      Igarashi Kento、Kuchiiwa Toshiko、Kuchiiwa Satoshi、Iwai Haruki、Tomita Kazuo、Sato Tomoaki
    • Journal Title

      Brain Research

      Volume: 1768 Pages: 147580-147580

    • DOI

      10.1016/j.brainres.2021.147580

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] Analysis of the effects of oxytocin and vasopressin on mice showing high aggression in isolation-rearing2022

    • Author(s)
      Igarashi Kento, Kuchiiwa Satoshi, Kuchiiwa Toshiko, Tomita Kazuo, Tanaka Koh-ichi, Kitanaka Junichi, Kitanaka Nobue, Nishiyama Nobuyoshi, and Sato Tomoaki
    • Organizer
      Neuro2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Oxytocin administration to head gamma-irradiated mice results in increased KCC2 mRNA expression through decreased phosphorylated CREB2022

    • Author(s)
      Kento Igarashi,Koh-ichi Tanaka,Junichi Kitanaka,Nobue Kitanaka,Nobuyoshi Nishiyama,Kazuo Tomita,Tomoaki Sato
    • Organizer
      第96回 日本薬理学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 隔離飼育ストレス負荷マウスの攻撃性と関連する行動的特徴の解析2022

    • Author(s)
      五十嵐健人、口岩俊子、口岩聡、富田和男、田中康一、北中純一、北中順惠、西山信好、佐藤友昭
    • Organizer
      第95回日本薬理学会年会
    • Related Report
      2021 Research-status Report
  • [Presentation] 加味逍遙散は隔離飼育マウスの噛みつき行動を低減する2021

    • Author(s)
      五十嵐健人、富田和男、佐藤友昭
    • Organizer
      第71回日本東洋医学会学術総会
    • Related Report
      2021 Research-status Report
  • [Presentation] 加味逍遙散投与マウス背側縫線核におけるエストロゲン受容体αおよびβ発現の解析2021

    • Author(s)
      五十嵐健人、口岩俊子、口岩聡、岩井治樹、富田和男、佐藤友昭
    • Organizer
      第44回日本分子生物学会年会
    • Related Report
      2021 Research-status Report
  • [Presentation] 幼若マウスおよび初代培養神経細胞に対する放射線照射とオキシトシンの防護効果の解析2021

    • Author(s)
      五十嵐健人、田中康一、北中純一、北中順惠、西山信好、富田和男、佐藤友昭
    • Organizer
      第74回日本薬理学会西南部会
    • Related Report
      2021 Research-status Report
  • [Presentation] Kamishoyosan reduces aggressive behavior of isolated-reared mice toward inanimate objects and involvement of estrogen receptor β2021

    • Author(s)
      Igarashi Kento, Kuchiiwa Toshiko, Kuchiiwa Satoshi, Tomita Kazuo, Tanaka Koh-ichi, Kitanaka Junichi, Kitanaka Nobue, Nishiyama Nobuyoshi, Takemura Motohiko, and Sato Tomoaki
    • Organizer
      第94回日本薬理学会年会
    • Related Report
      2020 Research-status Report
  • [Presentation] KCC2, a K+-Cl- co-transporter, is a possible target to attenuate the neuronal dysfunction that is associated with radiation therapy for brain tumor.2019

    • Author(s)
      Igarashi Kento, Tomita Kazuo, Tanaka Koh-ichi, Kuwahara Yoshikazu, Nishiyama Nobuyoshi, Kurimasa Akihiro and Sato Tomoaki
    • Organizer
      第6回アジア神経精神薬理学会大会
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 放射線照射により惹起される脳機能障害に対する、K+-Cl-トランスポーターKCC2を標的とした薬物療法の有用性2019

    • Author(s)
      五十嵐健人、富田和男、田中康一、桑原義和、西山信好、栗政明弘、佐藤友昭
    • Organizer
      第72回日本薬理学会西南部会
    • Related Report
      2019 Research-status Report
  • [Presentation] An examination whether KCC2, a K+-Cl- co-transporter, is efficient as a target to attenuate the neuronal dysfunction that is associated with radiation therapy for brain tumor by using oxytocin.2019

    • Author(s)
      Igarashi Kento, Tomita Kazuo, Tanaka Koh-ichi, Kuwahara Yoshikazu, Kitanaka Junichi, Kitanaka Nobue, Nishiyama Nobuyoshi, Kurimasa Akihiro, Takemura Motohiko and Sato Tomoaki
    • Organizer
      第93回日本薬理学会年会
    • Related Report
      2019 Research-status Report

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

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