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Association of pulsatile circulation with brain function and brain disease: an approach using ex vivo whole brain preparations

Research Project

Project/Area Number 19K22990
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 90:Biomedical engineering and related fields
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

Takashima Ichiro  国立研究開発法人産業技術総合研究所, 情報・人間工学領域, 上級主任研究員 (90357351)

Co-Investigator(Kenkyū-buntansha) 梶原 利一  明治大学, 理工学部, 専任准教授 (60356772)
冨永 貴志  徳島文理大学, 神経科学研究所, 教授 (20344046)
Project Period (FY) 2019-06-28 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2021: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2020: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords脳機能 / 血液循環 / 血液脳関門 / 心拍
Outline of Research at the Start

「拍動する血液循環は脳にとって必要か否か?」本研究課題は、動物から取り出した“全脳摘出標本と人工血液循環装置”を利用し、以下、3つの問に対する答えを探求する。
(1)拍動流周期のどのタイミングで脳活動を惹起しても 脳の応答は不変か? あるいは、拍動する血液循環が脳の応答に何らかの影響を与えるか?
(2)脳活動のゆらぎの一因として、拍動する血液循環の関与があるかどうか?
(3)拍動する脳血流は、脳細胞の生存にとって有利なのか不利なのか?
脳実質への拍動流効果についての知見は乏しく、人工心臓の研究開発分野、脳血管性の病態発現機構や創薬の研究分野に対し、有益な情報を提供することを目指す。

Outline of Final Research Achievements

The effects of pulsatile flow on brain parenchyma have not been well understood. Therefore, we examined the effect of pulsatile circulation on the brain using ex vivo whole brain preparations and an artificial blood circulation system. First, an experimental system was developed in which whole brain preparations could maintain physiological activity for 5 hours by pulsatile circulation of artificial blood. Next, electrical stimulation was given to the lateral olfactory tracts at different phases of the pulsatile flow to elicit neural activity, and the neural responses in the piriform cortex were analyzed. The results revealed a phenomenon in which local field potential activity changes relative to the phase of the pulsatile flow, suggesting that pulsatile circulation may modulate brain function.

Academic Significance and Societal Importance of the Research Achievements

拍動循環により全脳標本を維持する実験系を確立した。本実験技術は、血液脳関門機能を保存したex vivoモデルとして脳血管性の病態発現機構の研究や、脳を標的とした創薬の研究分野に応用できる可能性がある。また、本研究では、拍動流の位相によって神経応答が変化することが初めて示された。現象のメカニズム解明にはさらなる研究が必要であるが、拍動流が脳機能を調節する可能性を示唆する本研究成果は、脳と心臓の新しい関係を探る第一歩と位置付けられる。人工心臓の研究開発やその脳実質への影響評価の分野においても、本実験技術に基づく脳機能解析の手法が有益な情報を提供できる可能性がある。

Report

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

    (10 results)

All 2021 2020 2019

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

  • [Journal Article] Voltage-Sensitive Dye versus Intrinsic Signal Optical Imaging: Comparison of Tactile Responses in Primary and Secondary Somatosensory Cortices of Rats2021

    • Author(s)
      Takashima Ichiro, Kajiwara Riichi
    • Journal Title

      Brain Sciences

      Volume: 11 Issue: 10 Pages: 1294-1294

    • DOI

      10.3390/brainsci11101294

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Cortical direct current stimulation improves signal transmission between the motor cortices of rats2021

    • Author(s)
      Kunori Nobuo、Takashima Ichiro
    • Journal Title

      Neuroscience Letters

      Volume: 741 Pages: 135492-135492

    • DOI

      10.1016/j.neulet.2020.135492

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Lesions of the nucleus basalis magnocellularis (Meynert) induce enhanced somatosensory responses and tactile hypersensitivity in rats2021

    • Author(s)
      Dezawa Shinnosuke、Nagasaka Kazuaki、Watanabe Yumiko、Takashima Ichiro
    • Journal Title

      Experimental Neurology

      Volume: 335 Pages: 113493-113493

    • DOI

      10.1016/j.expneurol.2020.113493

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] An Implantable Cranial Window Using a Collagen Membrane for Chronic Voltage-Sensitive Dye Imaging2019

    • Author(s)
      Kunori Nobuo、Takashima Ichiro
    • Journal Title

      Micromachines

      Volume: 10 Issue: 11 Pages: 789-789

    • DOI

      10.3390/mi10110789

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Neonatal hypoxic-ischemic brain injury causes motor dysfunctions2021

    • Author(s)
      後藤、高島、九里
    • Organizer
      第44回日本神経科学大会
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effects of brain temperature on somatosensory evoked potentials2021

    • Author(s)
      後藤、出澤、高島、山本
    • Organizer
      第44回日本神経科学大会
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Transcranial direct current stimulation (tDCS) improves mechanical nociceptive threshold in 6-OHDA-induced Parkinson's rats2021

    • Author(s)
      出澤、田村、加藤、高島
    • Organizer
      第44回日本神経科学大会
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The effect of transcranial direct current stimulation (tDCS) on forelimb motor function in 6-OHDA-induced rat model of Parkinson's disease2021

    • Author(s)
      田村、出澤、仲田、加藤、高島
    • Organizer
      第44回日本神経科学大会
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 脳温度変化による興奮・抑制バランスの調節2020

    • Author(s)
      後藤、長坂、仲田、高島、山本
    • Organizer
      第43回日本神経科学大会
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] ラットマイネルト基底核の感覚皮質応答および触覚感度調節2020

    • Author(s)
      出澤、長坂、渡辺、高島
    • Organizer
      第43回日本神経科学大会
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research

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Published: 2019-07-04   Modified: 2023-01-30  

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