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A new diagnostic technology for degeneration of knee ligaments using Raman spectroscopy and its developmetnt toward practical applications

Research Project

Project/Area Number 17K11029
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Orthopaedic surgery
Research InstitutionTokyo Medical University

Principal Investigator

TAKAHASHI Yasuhito  東京医科大学, 医学部, 助教 (60567668)

Co-Investigator(Kenkyū-buntansha) 松永 怜  東京医科大学, 医学部, 助教 (90459579)
澤地 恭昇  東京医科大学, 医学部, 助教(特任) (20571152)
宍戸 孝明  東京医科大学, 医学部, 准教授 (70266500)
香取 庸一  東京医科大学, 医学部, 臨床講師 (40233837)
立岩 俊之  東京医科大学, 医学部, 講師 (00424630)
山本 謙吾  東京医科大学, 医学部, 主任教授 (10246316)
Project Period (FY) 2017-04-01 – 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 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords前十字靭帯 / ラマン分光 / 近赤外レーザー / 組織診断 / 光バイオプシー / 組織変性 / 近赤外ラマン分光 / 細胞外マトリックス / 膝靱帯 / I型コラーゲン / 生体材料 / 生体分子 / 分析科学 / 化学物理
Outline of Final Research Achievements

In this study, near-infrared laser Raman spectroscopy was applied to human anterior cruciate ligament (ACL) to establish optical algorithms for non-destructively diagnosing a degeneration state at molecular level. Raman spectra of ex-vivo ACL were collected, and were subsequently classified as an early and advanced degradation groups based on the histopathological scoring system.
The significant differences in several Raman peak intensities of ACL were found between the different degeneration groups, which were assigned to the vibrational modes of nucleic acids in cells, collagens, and phospholipids. Linear discriminant analysis (LDA) was performed to identify cut-off values for the distributions of the Raman intensity ratios, which enable to best discriminate between the early and advanced degenerated tissues. Our Raman algorithm yielded a maximum diagnostic sensitivity of 100%, specificity of 80%, and accuracy of 91% for discriminating the degeneration severity.

Academic Significance and Societal Importance of the Research Achievements

前十字靭帯(ACL)における組織変性度の診断は、病理や生化学分析など組織切除を要する侵襲検査法に依存している。一方、非破壊検査法としてMRI画像診断も実施されているが、ACLの完全/部分断裂の有無や粘液変性の診断にその応用場面が限定されている。そこで本研究では非破壊検査法である近赤外レーザーラマン分光法を応用し、ACLの局所変性度を診断するための光学アルゴリズムを構築した。レーザー光を用いた本診断法を適応すれば、低侵襲迅速診断が理論上可能になり、特に初期変性に対する診断が可能であることから、靭帯温存または切除に際する客観的判断指標を術者に与えられるなど臨床意義の高い研究成果であるといえる。

Report

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

    (3 results)

All 2019

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

  • [Journal Article] A New Method for Diagnosing Biochemical Abnormalities of Anterior Cruciate Ligament (ACL) in Human Knees: A Raman Spectroscopic Study2019

    • Author(s)
      Matsunaga R, Takahashi Y, Takahashi RH, Nagao T, Shishido T, Tateiwa T, Pezzotti G, Yamamoto K.
    • Journal Title

      Acta Biomaterialia

      Volume: 99 Pages: 284-294

    • DOI

      10.1016/j.actbio.2019.09.016

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] ヒト前十字靭帯の非侵襲診断に向けたレーザーラマン分光の応用2019

    • Author(s)
      松永怜、高橋康仁、山本謙吾
    • Organizer
      第11回日本関節鏡・膝・スポーツ整形外科学会(JOSKAS)
    • Related Report
      2019 Annual Research Report
  • [Presentation] ヒト前十字靭帯の非侵襲診断に向けた近赤外レーザーラマン分光の応用2019

    • Author(s)
      松永怜、高橋康仁、高橋礼典、長尾俊孝、宍戸孝明、正岡利紀、立岩俊之、山本謙吾
    • Organizer
      第34回日本整形外科学会基礎学術集会
    • Related Report
      2019 Annual Research Report

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Published: 2017-04-28   Modified: 2021-02-19  

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