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diffuse reflectance spectroscopic analysis of fatty liver

Research Project

Project/Area Number 16K10585
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Digestive surgery
Research InstitutionThe University of Tokyo (2018-2019)
National Defense Medical College (2016-2017)

Principal Investigator

Yamamoto Junji  東京大学, 医学部附属病院, 登録研究員 (40342654)

Co-Investigator(Kenkyū-buntansha) 緒方 衝  防衛医科大学校(医学教育部医学科進学課程及び専門課程、動物実験施設、共同利用研究施設、病院並びに防衛, 臨床検査医学, 准教授 (00531435)
川内 聡子  防衛医科大学校(医学教育部医学科進学課程及び専門課程、動物実験施設、共同利用研究施設、病院並びに防衛, 防衛医学研究センター 生体情報・治療システム研究部門, 講師 (20506505)
青笹 季文  防衛医科大学校(医学教育部医学科進学課程及び専門課程、動物実験施設、共同利用研究施設、病院並びに防衛, 外科学, 准教授 (40649034)
佐藤 俊一  防衛医科大学校(医学教育部医学科進学課程及び専門課程、動物実験施設、共同利用研究施設、病院並びに防衛, 防衛医学研究センター 生体情報・治療システム研究部門, 教授 (90502906)
Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords拡散反射スペクトル計測 / 脂肪肝 / 脂肪肝炎 / 脂肪性肝疾患 / 拡散反射スペクトル / 炎症 / 非アルコール性脂肪性肝疾患 / 非アルコール性脂肪肝 / 非アルコール性脂肪肝炎 / 光学計測 / マウスモデル / 光学診断 / 可視光 / 近赤外光 / 拡散反射光
Outline of Final Research Achievements

To evaluate the usefulness of diffuse reflectance spectroscopy (DRS) to estimate the pathological states of fatty liver with inflammation, in vivo optical fiber-based DRS in both the near-infrared (NIR) and visible (VIS) spectral regions was done for livers in STAM mice, which show steatosis at 6 weeks, steatohepatitis at 8 weeks and fibrosis at 12 weeks of age. The liver tissues were histologically scored according to the rodent non-alcoholic fatty liver disease activity score system. The 2nd derivative values of reflectance at 1204 nm, the lipid absorption peak in the NIR region, were strongly correlated with steatosis scores (r=0.9118, p<0.0001) and that the differences of the 1st derivative values of reflectance in the VIS region (570 nm- 550 nm) that reflect hemoglobin deoxygenation were significantly correlated with inflammation scores (r=0.5260, p=0.0172). Our DRS method would be useful for diagnosis of the states of steatosis with inflammation in livers and hence NASH.

Academic Significance and Societal Importance of the Research Achievements

メタボリックシンドロームに合併する脂肪肝は近年大きな社会経済的問題となってきている。飲酒歴のない脂肪性肝障害である非アルコール性脂肪性肝疾患nonalcoholic fatty liver disease (NAFLD)患者の10~15%が非アルコール性脂肪肝炎nonalcoholic steatohepatitis (NASH)に発展し、NASHの10~25%は肝硬変に移行し、さらに肝硬変になると5年で10%を超える発癌がみられる。本研究は上記病態を簡便に非侵襲的に検出する光学的手法の有用性を検討したものである。実用化されれば、本病態の診断治療に貢献しより健康な社会を実現することができる。

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (2 results)

All 2017 2016

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results)

  • [Journal Article] In vivo imaging of hepatic hemodynamics and light scattering property during ischemia-reperfusion in rats based on spectrocolorimetry2017

    • Author(s)
      Sharmin Akter, Satoko Kawauchi, Shunichi Sato, Suefumi Aosasa, Junji Yamamoto, and Izumi Nishidate
    • Journal Title

      Biomedical Optics Express

      Volume: 8 Issue: 2 Pages: 974-992

    • DOI

      10.1364/boe.8.000974

    • Related Report
      2017 Research-status Report 2016 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] In vivo estimation of optical properties of rat liver using single-reflectance fiber probe suring ischemia and reperfusion.2016

    • Author(s)
      Akter S, Tomoki Tanabe, Yamamoto J, Nishidate I.
    • Journal Title

      Optical Review

      Volume: 23 Pages: 354-359

    • Related Report
      2016 Research-status Report
    • Peer Reviewed

URL: 

Published: 2016-04-21   Modified: 2021-02-19  

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