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2021 Fiscal Year Final Research Report

Exploration of the new method to stimulate protective protein function during machine perfusion of steatotic graft

Research Project

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Project/Area Number 19K09088
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 55010:General surgery and pediatric surgery-related
Research InstitutionHokkaido University

Principal Investigator

Wakayama Kenji  北海道大学, 医学研究院, 客員研究員 (50646544)

Co-Investigator(Kenkyū-buntansha) 嶋村 剛  北海道大学, 大学病院, 准教授 (00333617)
島田 慎吾  北海道大学, 医学研究院, 客員研究員 (40755576)
深井 原  北海道大学, 医学研究院, 特任講師 (60374344)
木村 太一  北海道大学, 医学研究院, 客員研究員 (90435959)
Project Period (FY) 2019-04-01 – 2022-03-31
Keywords肝移植 / 脂肪肝 / 機械灌流 / 脂肪滴 / ミトコンドリア
Outline of Final Research Achievements

We have established a reliable steatostic rat model and evaluated the time course of the potential prognostic markers of ischemia reperfusion injury (IRI) using MALDI imaging mass spectrometry (IMS) method. We found some promising candidates of injury markers, which could predict the severity of IRI due to the ischemic time regardless of the grade of the fatty change. Lysophosphatidylinositol (LPI) 18:0 showed excellent correlation with the post-repefusion injury, such as blood ALT level and injury score. Furthermore, distribution of LPI (18:0) revealed the ischemia time dependent accumulation during ischemia, specific to the Zone1 area. Some other indices also showed a potential to predict IRI. Accordingly, IMS appeared to show its ability to detect regional subtle change due to the ischemic insult.

Free Research Field

臓器移植、臓器保存、臓器灌流、酸化ストレス

Academic Significance and Societal Importance of the Research Achievements

IMS法により虚血中に虚血時間依存的に門脈域で限局的に起こる事象を捉えることに成功した。通常のホモジナイズして抽出する方法ではマスクされてしまう限局した変化を定量評価できることに意義がある。他にも再胆管構造中に限局して起こる変化もとらえており、単一の傷害予測マーカーを測定する方法というよりも、1つの方法で肝グラフトの状態を多角的に機能評価できる方法論と言える。今後、臓器灌流におけるグラフト機能評価に有用な方法論になることが期待される。

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Published: 2023-01-30  

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