• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Activation of microglia after sciatic nerve injury

Research Project

Project/Area Number 17K16736
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Anesthesiology
Research InstitutionEhime University

Principal Investigator

Nishihara Tasuku  愛媛大学, 医学部附属病院, 講師 (50568912)

Project Period (FY) 2017-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywordsマイクログリア / シナプティックストリッピング / ミエリン / 末梢神経傷害 / 活性化マイクログリア / 脊髄前角 / 神経保護性 / ミクログリア / 神経保護
Outline of Final Research Achievements

Activation of microglia in the posterior horn of the lumbar cord has been well investigated as one of the critical causes for the neuropathic pain after peripheral nerve injury. However, activation of microglia is observed also in the anterior horn. In this study, we report the differential activation modes of microglia in anterior horn and posterior horn. Microglia in the anterior horn tightly surrounded motoneurons, however reduction of synaptic proteins was not evident, suggesting engagement in synaptic stripping. On the other hand, microglia in the posterior horn showed amoeboid morphology and attached to myelin sheaths rather than neurons. Immunoreactivity of myelin basic protein was found in phagosomes of activated microglia in the posterior horn, indicating that the phagocytic removal of myelin. These data may clarify the pathogenesis of the different symptoms in motor and sensory functions after peripheral nerve injuries.

Academic Significance and Societal Importance of the Research Achievements

これまで、脊髄後角でのマイクログリアの活性化に注目が集まり、痛みとの関連が広く研究されてきた。これにより、疼痛管理における治療戦略が今後大きく変わる可能性が出てきている。
疼痛との関連を研究するにあたり、脊髄後角は特に感覚神経の通り道であるため、非常に重要な部位である。一方、脊髄前角は運動神経の通り道の一つである。強い末梢神経傷害では運動麻痺が見られるが、末梢神経傷害部位以降の麻痺は簡単に観察つされるが、脊髄でのマイクログリアの反応に注目した研究は無かった。
この研究により、末梢神経傷害時の疼痛だけではなく、運動神経麻痺つまり運動神経機能にも着目が集まる可能性がある。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • Research Products

    (8 results)

All 2019 2018 2017

All Journal Article (6 results) (of which Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (2 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Carbon monoxide poisoning-induced delayed encephalopathy accompanies decreased microglial cell numbers: Distinctive pathophysiological features from hypoxemia-induced brain damage2019

    • Author(s)
      Sekiya K, Nishihara T, Abe N, Konishi A, Nandate H, Hamada T, Ikemune K, Takasaki Y, Tanaka J, Asano M, Yorozuya T
    • Journal Title

      Brain Research

      Volume: 1710 Pages: 22-32

    • DOI

      10.1016/j.brainres.2018.12.027

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Comparison of the detrimental features of microglia and infiltrated macrophages in traumatic brain injury: a study using a hypnotic bromovalerylurea2018

    • Author(s)
      Abe N, Choudhury ME, Watanabe M, Kawasaki S, Nishihara T, Yano H, Matsumoto S, Kunieda T, Kumon Y, Yorozuya T, Tanaka J
    • Journal Title

      Glia

      Volume: 66(10) Issue: 10 Pages: 2158-2173

    • DOI

      10.1002/glia.23469

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effect of dexmedetomidine on intraocular pressure in patients undergoing robot-assisted laparoscopic radical prostatectomy under total intravenous anesthesia: A randomized, double blinded placebo controlled clinical trial2018

    • Author(s)
      Kitamura S, Takechi K, Nishihara T, Konishi A, Takasaki Y, Yorozuya T
    • Journal Title

      Journal of Clinical Anesthesia

      Volume: 49 Pages: 30-35

    • DOI

      10.1016/j.jclinane.2018.06.006

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Development of a postoperative occlusive thrombus at the site of an implanted inferior vena cava filter: A case report.2018

    • Author(s)
      Ayako Kukida, Yasushi Takasaki, Mio Nakata, Tasuku Nishihara, Sakiko Kitamura, Sonoko Fujii, Yuji Watanabe, Toshihiro Yorozuya
    • Journal Title

      Medicine (Baltimore)

      Volume: 97(3) Issue: 3 Pages: e9675-e9675

    • DOI

      10.1097/md.0000000000009675

    • Related Report
      2017 Research-status Report
  • [Journal Article] Effects of hypnotic bromovalerylurea on microglial BV2 cells2017

    • Author(s)
      Shun Kawasaki, Naoki Abe, Fumito Ohtake, Afsana Islam, Mohammed Emamussalehin Choudhury, et al.
    • Journal Title

      Journal of Pharmacological Sciences

      Volume: 134 Issue: 2 Pages: 116-123

    • DOI

      10.1016/j.jphs.2017.05.007

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Perioperative management of a patient with Coffin-Lowry syndrome complicated by severe obesity: A case report and literature review.2017

    • Author(s)
      Mikako Hirakawa, Tasuku Nishihara, Kazuo Nakanishi, Sakiko Kitamura, Sonoko Fujii, Keizo Ikemune, Kentaro Dote, Yasushi Takasaki, Toshihiro Yorozuya
    • Journal Title

      Medicine (Baltimore)

      Volume: 96(49) Issue: 49 Pages: e9026-e9026

    • DOI

      10.1097/md.0000000000009026

    • Related Report
      2017 Research-status Report
  • [Presentation] 末梢神経傷害時の脊髄前角と後角における活性化マイクログリアの貪食ターゲットの違い2019

    • Author(s)
      西原 佑、萬家 俊博
    • Organizer
      日本神経麻酔集中治療学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Microglial activation in spinal anterior horn after peripheral nerve injury: is the activation detrimental or neuroprotective?2018

    • Author(s)
      Tasuku Nishihara, Junya Tanaka, Toshihiro Yorozuya
    • Organizer
      Society for Neuroscience Annual Meeting
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research

URL: 

Published: 2017-04-28   Modified: 2020-03-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi