• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Development of prediction model of fatal blood concentrations for designer drugs

Research Project

Project/Area Number 16K09200
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Legal medicine
Research InstitutionThe University of Tokyo

Principal Investigator

Saka Kanju  東京大学, 大学院医学系研究科(医学部), 技術専門職員 (30447388)

Co-Investigator(Kenkyū-buntansha) 工藤 恵子  九州大学, 医学研究院, 講師 (10186405)
Research Collaborator IWASE hirotaro  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords予測モデル / 血中致死濃度 / 危険ドラッグ / QSAR / 致死濃度 / in silico / 法医中毒学 / 社会医学
Outline of Final Research Achievements

We examined the best processes for building a model predicting fatal blood concentrations using reliable fatal blood concentration data where many fatal cases have been reported. Quantitative structure-activity relationship was used to build the prediction models. As a result of creating various models, the optimal descriptors were different for each target drug. Therefore, we devised a method to create a prediction equation for each drug. In this method, instead of using all known fatal concentration data, drugs whose structures are similar to that of the target drug are extracted by similarity search, and a model is built using only the extracted data. The introduction of this procedure improved the prediction accuracy, and it was considered that a better prediction model could be built by using drug data with similar structure even for new drugs.

Academic Significance and Societal Importance of the Research Achievements

法医鑑定において、薬物が死因に寄与したかどうかを判断するために、該当試料の血液中濃度と文献記載の中毒・致死濃度が比較検討される。しかし、致死濃度が判明していない危険ドラッグなどの新規薬物では判断が難しくなる。これらの問題を解決するために、本研究では、薬物の血中致死濃度予測モデルの構築を試みた。
本研究によって、新規の薬物に対しても、その致死濃度を推測することが可能になった。また、in silicoを用いた理論的なアプローチであるため、危険ドラッグのように薬物の側鎖を少し変化させたときの化学構造とその毒性との関連性を考察することが可能になった。

Report

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

    (12 results)

All 2019 2018 2017 2016

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 1 results) Presentation (7 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results)

  • [Journal Article] Forensic analysis using ultra-high-performance liquid chromatography-tandem mass spectrometry with solid-phase extraction of α-solanine and α-chaconine in whole blood2019

    • Author(s)
      Nara Akina、Saka Kanju、Yamada Chiho、Kodama Takanori、Takagi Tetsuya
    • Journal Title

      Forensic Toxicology

      Volume: 37 Issue: 1 Pages: 197-206

    • DOI

      10.1007/s11419-018-0452-7

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Fatal intoxication with 1,1-difluoroethane (DFE) due to inhalation of a spray cleaner: analysis by GC-MS2019

    • Author(s)
      Torimitsu Suguru、Fujii Yusuke、Saka Kanju、Abe Hiroko、Makino Yohsuke、Chiba Fumiko、Iwase Hirotaro
    • Journal Title

      Forensic Toxicology

      Volume: 37 Issue: 1 Pages: 245-249

    • DOI

      10.1007/s11419-018-0435-8

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Fatal Poisoning with Both Dichlorvos and Phenthoate2018

    • Author(s)
      Nara Akina、Yamada Chiho、Kodama Takanori、Saka Kanju、Takagi Tetsuya
    • Journal Title

      Journal of Forensic Sciences

      Volume: 63 Issue: 6 Pages: 1928-1931

    • DOI

      10.1111/1556-4029.13781

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] High-Throughput Functional Evaluation of Variants of Unknown Significance inERBB22018

    • Author(s)
      Nagano Masaaki、Kohsaka Shinji、Ueno Toshihide、Kojima Shinya、Saka Kanju、Iwase Hirotaro、Kawazu Masahito、Mano Hiroyuki
    • Journal Title

      Clinical Cancer Research

      Volume: 24 Issue: 20 Pages: 5112-5122

    • DOI

      10.1158/1078-0432.ccr-18-0991

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Experimental Study on the Postmortem Redistribution of the Substituted Phenethylamine, 25B-NBOMe2017

    • Author(s)
      Shintani-Ishida Kaori、Saka Kanju、Nakamura Mami、Yoshida Ken-ichi、Ikegaya Hiroshi
    • Journal Title

      Journal of Forensic Sciences

      Volume: 63 Issue: 2 Pages: 588-591

    • DOI

      10.1111/1556-4029.13583

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] In silico modeling to predict fatal blood concentrations of drugs (preliminary study)2018

    • Author(s)
      Saka K, Kudo K, Makino Y, Ikeda N, Iwase H
    • Organizer
      56TH Annual meeting of the international association of forensic toxicologists (TIAFT) 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 薬物の血中致死濃度予測モデルの検討2018

    • Author(s)
      坂幹樹, 工藤恵子, 槇野陽介, 池田典昭, 岩瀬博太郎
    • Organizer
      日本法中毒学会第37年会
    • Related Report
      2018 Annual Research Report
  • [Presentation] A state-of-the-art retention time prediction model for non-target drug screening2018

    • Author(s)
      Saka K, Nakazono Y, Kudo K, Minohata T, Hirano I, Furuta K, Fujii Y, Makino Y, Ikeda N, Iwase H
    • Organizer
      24th Congress of the International Academy of Legal Medicine (IALM)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 法医中毒学へのin silicoモデル活用事例:マトリックス効果予測・保持時間予測・薬物血中致死濃度予測2018

    • Author(s)
      坂幹樹
    • Organizer
      情報計算化学生物学会(CBI学会)
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] In silicoを用いたノンターゲット血中薬物スクリーニング法の構築(第2報)2017

    • Author(s)
      坂幹樹, 中園裕紀子, 工藤恵子, 箕畑俊和, 兼城昌敏, 平野一郎, 古田一匡, 藤井祐介, 槇野陽介, 池田典昭, 岩瀬博太郎
    • Organizer
      日本法中毒学会第36年会
    • Related Report
      2017 Research-status Report
  • [Presentation] ACD/MS Structure ID Suite, ACD/ChromGeniusを用いたLC/MS血中薬物スクリーニング法の構築2016

    • Author(s)
      坂 幹樹
    • Organizer
      ACD/Labs日本ユーザー会2016
    • Place of Presentation
      品川インターシティC棟 富士通マーケティング本社(東京都港区)
    • Year and Date
      2016-10-18
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] In silicoによるLC/MSを用いた血中薬物スクリーニング法の構築2016

    • Author(s)
      坂 幹樹
    • Organizer
      日本法中毒学会第35年会
    • Place of Presentation
      大阪産業創造館(大阪府大阪市)
    • Year and Date
      2016-07-01
    • Related Report
      2016 Research-status Report

URL: 

Published: 2016-04-21   Modified: 2020-03-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi