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Influence of recurrent laryngeal nerve palsy after esophagectomy ~ future plan of treatment using amnion sheet

Research Project

Project/Area Number 22K08863
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 55020:Digestive surgery-related
Research InstitutionTohoku University

Principal Investigator

Taniyama Yusuke  東北大学, 大学病院, 講師 (00622987)

Co-Investigator(Kenkyū-buntansha) 亀井 尚  東北大学, 医学系研究科, 教授 (10436115)
小澤 洋平  東北大学, 大学病院, 助教 (10757123)
戸子台 和哲  東北大学, 大学病院, 准教授 (50581641)
佐藤 千晃  東北大学, 大学病院, 講師 (60646800)
Project Period (FY) 2022-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2024: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords羊膜 / 神経再生 / 再生医療
Outline of Research at the Start

食道癌手術において反回神経麻痺は頻度が高く、術後誤嚥性肺炎を引き起こす重大な合併症である。近年、胎盤から採取される羊膜が再生医療分野における組織・細胞ソースとして注目されている。そこで我々は羊膜の創傷治癒効果を神経修復に応用することでこれまでにない神経修復材を開発できる可能性があると考えた。本研究ではラット神経損傷モデルを用いて、ヒト羊膜の神経修復効果を神経伝達速度や組織学的変化を解析することにより検証する。この研究は我々独自の研究であり反回神経麻痺の改善のみならず他の神経損傷の治療としても期待できるものと思われる。

Outline of Final Research Achievements

We investigated the recovery of injured sciatic nerves covered with amniotic membrane following transection and suturing. In nerve conduction studies, the amniotic group exhibited higher electrical potentials from the 6th to the 10th week compared to the control group, with a significant difference observed at the 8th week (p=0.0317). Histological evaluation of axons showed slightly higher numbers in the amniotic group at the 4th and 8th weeks. Angiogenesis assessment revealed a significantly greater number of blood vessels in the amniotic group at day 21 (p=0.0317), particularly observed between the neural epineurium and amniotic membrane. Inflammatory cells positive for CD11b and CD68 showed a decreasing trend after day 7, whereas FoxP3-positive cells increased over time.
These findings have been presented at an international conference and are currently under submission.

Academic Significance and Societal Importance of the Research Achievements

この研究によって神経損傷に対する羊膜による被覆は神経再生を促進する可能性があると考えられた。特に損傷の初期の電気生理学的回復と血管新生において有望な効果を示したと推測される。よって将来的に手術時や外傷において神経が損傷された際に治療の選択肢として羊膜を用いることの有用性が示されたと考える。

Report

(4 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • Research Products

    (2 results)

All 2024

All Presentation (2 results) (of which Int'l Joint Research: 2 results)

  • [Presentation] A peripheral nerve repair treatment method using human amnion2024

    • Author(s)
      渡辺祐記
    • Organizer
      The Transplantation Society (TTS:国際移植学会)
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Influence of recurrent laryngeal nerve palsy after esophagectomy ~ future plan of treatment using amnion sheet2024

    • Author(s)
      谷山裕亮
    • Organizer
      United European Gastroenterology (UEGW:欧州消化器病週間)
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research

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Published: 2022-04-19   Modified: 2026-01-16  

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