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Development of an animal model to elucidate the pathophysiology of postoperative REM sleep rebound

Research Project

Project/Area Number 20K23078
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0907:Oral science and related fields
Research InstitutionOsaka University

Principal Investigator

Ueno Yoshio  大阪大学, 大学院歯学研究科, 招へい教員 (50880118)

Project Period (FY) 2020-09-11 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords術後レム睡眠リバウンド / 周術期管理 / 術後せん妄
Outline of Research at the Start

口腔外科手術後に生じるレム睡眠リバウンドは、術後せん妄状態の発症に関わる可能性がある。また、反復型低酸素血症、心筋虚血の原因としても問題となっている。術後レム睡眠リバウンドの病態生理を解明できれば、術後せん妄や突然死を回避する方法の開発に役立つ。本研究では、術後レム睡眠リバウンドを誘発する実験動物を作成し、術前後の状態を再現した上で、睡眠・脳波・心電図・筋電図などを記録して、行動の変化、脳波活動等を調べる予定にしている。

Outline of Final Research Achievements

To analyze physiological changes in the process of postoperative REM sleep rebound, we performed sleep recording for 70 hours after oral surgery (partial tongue resection) under isoflurane anesthesia in rats (Iso-Ope group). The data were compared with those of animals with no intervention (naive group) and with isoflurane anesthesia (Iso group). In Iso-Ope group, time in REM sleep was lower during dark period after surgery compared to other two groups and, during the following light period, time in REM sleep did not increase remarkably. Theta EEG activity did not decrease during dark period in ISO-Ope group. Although sleep-wake cycles were preserved after surgery, the amount of wake period was higher for recording periods in Iso-Ope group than naive and Iso groups. These results suggest that the present experimental conditions can be used for the future studies on REM sleep rebound and sleep disturbance after oral surgery.

Academic Significance and Societal Importance of the Research Achievements

口腔外科臨床では、術後せん妄は術後2、3日の意識清明期を経て発症する。術後レム睡眠リバウンドは、上気道拡大筋の著明な弛緩により、気道閉塞による反復型低酸素血症を引き起こし、術後せん妄を発症させる可能性がある。しかし、術後のレム睡眠リバウンドなどの口腔外科手術の周術期に発生する現象は、安全面からも倫理的な側面からも患者において生理学的事象を測定することは困難である。本研究成果により全身麻酔下の口腔外科手術後の影響を実験動物で測定することにより、麻酔薬や手術内容による術後睡眠の発生原因の解明や、その対応や診断方法を開発するうえで有用な実験系の1つとなりうる点で学術的な意義があると考える。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (4 results)

All 2022 2021

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

  • [Journal Article] Motor representation of rhythmic jaw movements in the amygdala of guinea pigs2022

    • Author(s)
      Ueno Yoshio、Higashiyama Makoto、Haque Tahsinul、Masuda Yuji、Katagiri Ayano、Toyoda Hiroki、Uzawa Narikazu、Yoshida Atsushi、Kato Takafumi
    • Journal Title

      Archives of Oral Biology

      Volume: 135 Pages: 105362-105362

    • DOI

      10.1016/j.archoralbio.2022.105362

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] After-effects of acute footshock stress on sleep states and rhythmic masticatory muscle activity during sleep in guinea pigs2022

    • Author(s)
      Yano Hiroyuki、Ueno Yoshio、Higashiyama Makoto、Akhter Fatema、Katagiri Ayano、Toyoda Hiroki、Uzawa Narikazu、Yoshida Atsushi、Kato Takafumi
    • Journal Title

      Odontology

      Volume: - Issue: 3 Pages: 476-481

    • DOI

      10.1007/s10266-021-00679-0

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Changes in cortical, cardiac, and respiratory activities in relation to spontaneous rhythmic jaw movements in ketamine‐anesthetized guinea pigs2021

    • Author(s)
      Yano Hiroshi、Matsuura Yutaka、Katagiri Ayano、Higashiyama Makoto、Toyoda Hiroki、Sato Hajime、Ueno Yoshio、Uzawa Narikazu、Yoshida Atsushi、Kato Takafumi
    • Journal Title

      European Journal of Oral Sciences

      Volume: 129 Issue: 6

    • DOI

      10.1111/eos.12817

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] モルモット扁桃体における短潜時顎筋応答誘発部位の局在2021

    • Author(s)
      上野祥夫、吉田篤史、鵜澤成一、加藤隆史
    • Organizer
      第75回日本口腔科学会学術集会
    • Related Report
      2021 Research-status Report

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Published: 2020-09-29   Modified: 2024-01-30  

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