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2022 Fiscal Year Annual Research Report

What is the purpose of sleep? A study based on phagocytic elimination of synapses by microglia.

Research Project

Project/Area Number 20K06856
Research InstitutionEhime University

Principal Investigator

チョードリ エマムッサレヒン  愛媛大学, 医学系研究科, 助教 (90726803)

Project Period (FY) 2020-04-01 – 2023-03-31
Keywordsミクログリア / ドーパミン / せん妄
Outline of Annual Research Achievements

令和4年度は、睡眠覚醒リズムに大きな障害を与えるせん妄についてミクログリアと関連づけて研究を進めた。せん妄は、種々の脳疾患、高齢者、外科手術ストレス、感染症、外傷などを背景に発症する病態であり、サーカディアンリズム(睡眠覚醒リズム)の異常を伴い医療・看護を困難にし、患者本人にも多大な苦痛を与える。せん妄では、ミクログリアの活性化に伴って、種々の起炎症性サイトカインの脳内での産生増加が起こり神経炎症を生じることが主要な病態生理であると考えられている。今回の研究では、睡眠覚醒リズムの異常を生じるせん妄モデルを、大腸菌由来リポポリサッカライドLPSの腹腔内投与により作成した。LPS投与後、脳波のサーカディアンリズムが不明瞭となり、脳内ではTNFαとIL-1βの発現増加が見られた。しかし、投与後約20時間で脳波のサーカディアンリズムは概ね正常化し、IL-1βは高発現が持続したものの、TNFαの発現は低下した。この時、脳内ではドーパミン濃度が上昇していた。前頭葉および培養ミクログリアはドーパミンD1受容体を発現していたが、D1アゴニストを投与すると、TNFαとIL-1βの発現は減少した。ほぼ同様の効果が、LPS投与ラットへのL-DOPA投与でも得られた。我々は既に、ノルアドレナリンによるミクログリア機能制御がサーカディアンリズム形成に重要であることを示しているが、今回の結果はドーパミンも関与していることを新たに示したことになる。

  • Research Products

    (12 results)

All 2023 2022

All Journal Article (10 results) (of which Int'l Joint Research: 10 results,  Peer Reviewed: 10 results,  Open Access: 7 results) Presentation (2 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Anti-inflammatory effects of dopamine on microglia and a D1 receptor agonist ameliorates neuroinflammation of the brain in a rat delirium model2023

    • Author(s)
      Nishikawa Yuki、Choudhury Mohammed E.、Mikami Kanta、Matsuura Taisei、Kubo Madoka、Nagai Masahiro、Yamagishi Satoru、Doi Tomomi、Hisai Manami、Yamamoto Haruto、Yajima Chisato、Nishihara Tasuku、Abe Naoki、Yano Hajime、Yorozuya Toshihiro、Tanaka Junya
    • Journal Title

      Neurochemistry International

      Volume: 163 Pages: 105479~105479

    • DOI

      10.1016/j.neuint.2023.105479

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Bromovalerylurea modulates GABAA receptor-mediated inhibitory neurotransmission while inducing sleep2023

    • Author(s)
      Takeda Haruna、Yoshimura Yumiko、Takagi Masahiro、Sato Arisa、Kihara Nanako、Choudhury Mohammed E.、Yano Hajime、Tanaka Junya
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 638 Pages: 176~183

    • DOI

      10.1016/j.bbrc.2022.11.062

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Chloride Intracellular Channel Protein 2 Promotes Microglial Invasion: A Link to Microgliosis in the Parkinson’s Disease Brain2022

    • Author(s)
      Choudhury Mohammed E.、Ozaki Saya、Miyaue Noriyuki、Matsuura Taisei、Mikami Kanta、Islam Afsana、Kubo Madoka、Ando Rina、Yano Hajime、Kunieda Takeharu、Nagai Masahiro、Tanaka Junya
    • Journal Title

      Brain Sciences

      Volume: 13 Pages: 55~55

    • DOI

      10.3390/brainsci13010055

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Zonisamide Ameliorates Microglial Mitochondriopathy in Parkinson’s Disease Models2022

    • Author(s)
      Tada Satoshi、Choudhury Mohammed E.、Kubo Madoka、Ando Rina、Tanaka Junya、Nagai Masahiro
    • Journal Title

      Brain Sciences

      Volume: 12 Pages: 268~268

    • DOI

      10.3390/brainsci12020268

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Microglial re-modeling contributes to recovery from ischemic injury of rat brain: A study using a cytokine mixture containing granulocyte-macrophage colony-stimulating factor and interleukin-32022

    • Author(s)
      Matsumoto Shirabe、Choudhury Mohammed E.、Takeda Haruna、Sato Arisa、Kihara Nanako、Mikami Kanta、Inoue Akihiro、Yano Hajime、Watanabe Hideaki、Kumon Yoshiaki、Kunieda Takeharu、Tanaka Junya
    • Journal Title

      Frontiers in Neuroscience

      Volume: 16 Pages: 941363

    • DOI

      10.3389/fnins.2022.941363

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Treadmill Exercise as a Preventive Measure Against Age-Related Anxiety and Social Behavioral Disorders in Rats: When Is It Worth Starting?2022

    • Author(s)
      Taguchi Satoru、Choudhury Mohammed E.、Mikami Kanta、Utsunomiya Ryo、Yano Hajime、Tanaka Junya
    • Journal Title

      Annals of Rehabilitation Medicine

      Volume: 46 Pages: 320~328

    • DOI

      10.5535/arm.22105

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Rearing in an Enriched Environment Ameliorates the ADHD-like Behaviors of Lister Hooded Rats While Suppressing Neuronal Activities in the Medial Prefrontal Cortex2022

    • Author(s)
      Utsunomiya Ryo、Mikami Kanta、Doi Tomomi、Choudhury Mohammed E.、Jogamoto Toshihiro、Tokunaga Naohito、Ishii Eiichi、Eguchi Mariko、Yano Hajime、Tanaka Junya
    • Journal Title

      Cells

      Volume: 11 Pages: 3649~3649

    • DOI

      10.3390/cells11223649

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Utility of Rectus Abdominis Ultrasound as a Respiratory Function Test for Amyotrophic Lateral Sclerosis2022

    • Author(s)
      Ando Rina、Yamanishi Yuki、Tada Satoshi、Miyaue Noriyuki、Choudhury Mohammed Emamussalehin、Nagai Masahiro
    • Journal Title

      Respiratory Care

      Volume: 67 Pages: 520~525

    • DOI

      10.4187/respcare.09317

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Surgical stress quickly affects the numbers of circulating B-cells and neutrophils in murine septic and aseptic models through a β<sub>2</sub>adrenergic receptor2022

    • Author(s)
      Nishioka Ryutaro、Nishi Yusuke、Choudhury Mohammed E.、Miyaike Riko、Shinnishi Ayataka、Umakoshi Kensuke、Takada Yasutsugu、Sato Norio、Aibiki Mayuki、Yano Hajime、Tanaka Junya
    • Journal Title

      Journal of Immunotoxicology

      Volume: 19 Pages: 8~16

    • DOI

      10.1080/1547691X.2022.2029630

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Impact of Intestinal Bacteria on Levodopa Pharmacokinetics in <scp>LCIG</scp> Therapy2022

    • Author(s)
      Yamanishi Yuki、Choudhury Mohammed Emamussalehin、Yoshida Akira、Hosokawa Yuko、Miyaue Noriyuki、Tada Satoshi、Ando Rina、Murakami Shinobu、Miyamoto Hitoshi、Nagai Masahiro
    • Journal Title

      Movement Disorders Clinical Practice

      Volume: 9 Pages: 362~368

    • DOI

      10.1002/mdc3.13417

    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Systemic infection triggers a dopamine surge that suppresses microglial inflammation via dopamine D1 receptor2022

    • Author(s)
      Choudhury Mohammed E
    • Organizer
      Novel Insights into Glia Function & Dysfunction meeting
    • Int'l Joint Research
  • [Presentation] Acute neuroinflammation triggers a dopaminergic surge: a D1 dopamine receptors mediated compensatory role against inhibited spontaneous activity and sleep disturbances2022

    • Author(s)
      Choudhury Mohammed E
    • Organizer
      The 100th Anniversary Annual Meeting of The Physiological Society of Japan

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Published: 2023-12-25  

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