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Research on establishment of rapid microbial identification method for various forensic samples using nanopore sequencer

Research Project

Project/Area Number 19K10703
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 58040:Forensics medicine-related
Research InstitutionNational Research Institute of Police Science

Principal Investigator

Muto Junji  科学警察研究所, 法科学第一部, 主任研究官 (80432186)

Co-Investigator(Kenkyū-buntansha) 堀田 明豊  国立感染症研究所, 獣医科学部, 主任研究官 (90392323)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywordsナノポアシーケンサー / 微生物 / ロングリード / 検出 / 感染臓器 / ゲノム解析 / 同定 / 法科学的試料 / 次世代シークエンス / 野兎病菌 / 臓器試料 / fastq / EPI2ME / FASTQデータ抽出 / ナノポアシーケンシング / 遺伝子検出 / 迅速同定
Outline of Research at the Start

一般に試料中の微生物を同定する際、抗原抗体反応を用いる検査や微生物遺伝子を増幅・解析する検査などが行われる。通常は臨床症状や経過等から微生物種を推定し、種に特異的な抗体やプライマーを用いて検査を行うことから、同定に多くの時間や労力を要する。一方、当研究所で取り扱う試料は、生物テロや食品汚染など病原微生物を用いた犯罪で現場に残されたものが想定され、被害者の処置、被害拡大防止措置及び捜査のため早急な試料中の微生物同定が求められる。本研究では、ナノポアシーケンサーによる塩基配列検出技術を用いて各種法科学的試料から微生物遺伝子を検出できるか検証し、試料中の微生物を迅速に同定する方法の確立を目指す。

Outline of Final Research Achievements

We investigated whether the reads of Francisella tularensis could be detected from the organs and blood clots of the hares dead from tularemia using a nanopore sequencer. It was difficult to isolate and culture F. tularensis from the samples of the rotting carcass after death. However, the reads of F. tularensis could be detected from these samples using a nanopore sequencer.
On the other hand, a detailed analysis of the reads of the samples revealed that the read length was short. Therefore, we changed the sample preparation to the method suitable for obtaining long reads.
Preparation of the blood clots of the rotting carcass by this method increased read length. In addition, the Streptococcus pyogenes-contained blood sample, which had been frozen and stored for 11 years, was prepared by this method, and it was examined whether the reads of S. pyogenes could be detected in the same manner. As a result, the reads of S. pyogenes could be detected.

Academic Significance and Societal Importance of the Research Achievements

食品汚染や生物テロ等の病原微生物を用いた犯罪では、被害者の処置、被害拡大防止の対応および捜査のため、試料に含まれる微生物を迅速に検出・同定することが求められる。本研究では、迅速性や利便性で注目されているナノポアシーケンサーを用いて、血液や臓器等の法科学的試料から含まれている微生物を検出できるか検証した。野兎病で死亡したノウサギ死体の臓器や化膿レンサ球菌を含む血液試料から目的の細菌を検出でき、法科学的試料から微生物を検出・同定するのにナノポアシーケンサーは有用と考えられる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (13 results)

All 2022 2021 2020 2019

All Journal Article (6 results) (of which Peer Reviewed: 6 results,  Open Access: 5 results) Presentation (5 results) Book (2 results)

  • [Journal Article] Analysis Comparison for Rapid Identification of Pathogenic Virus from Infected Tissue Samples2022

    • Author(s)
      Hosokawa-Muto Junji、Sassa-O’Brien Yukiko、Fujinami Yoshihito、Nakahara Hiroaki
    • Journal Title

      Diagnostics

      Volume: 12 Issue: 1 Pages: 196-196

    • DOI

      10.3390/diagnostics12010196

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Complete Genome Sequences of Two Strains of Francisella tularensis subsp. holarctica bv. japonica2020

    • Author(s)
      Hotta Akitoyo、Fujita Osamu、Tanabayashi Kiyoshi、Uda Akihiko、Shindo Junji、Park Chun-Ho、Sato Hisaaki、Suzuki Michio、Morikawa Shigeru、Maeda Ken
    • Journal Title

      Microbiology Resource Announcements

      Volume: 9 Issue: 45

    • DOI

      10.1128/mra.01127-20

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Virulence of Francisella tularensis Subspecies holarctica Biovar japonica and Phenotypic Change during Serial Passages on Artificial Media2020

    • Author(s)
      Hotta Akitoyo、Sharma Neekun、Fujita Osamu、Uda Akihiko、Tanabayashi Kiyoshi、Tian Deyu、Yamada Akio、Morikawa Shigeru、Maeda Ken
    • Journal Title

      Microorganisms

      Volume: 8 Issue: 12 Pages: 1881-1881

    • DOI

      10.3390/microorganisms8121881

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Rapid detection of pathogenic virus genome sequence from throat and nasal swab samples using an exhaustive gene amplification method2019

    • Author(s)
      Junji Hosokawa-Muto, Hiroki Sakai, Yukiko Sassa, Yoshihito Fujinami, Mai Kishimoto, Hiroaki Nakahara
    • Journal Title

      Forensic Science, Medicine and Pathology

      Volume: 15 Issue: 3 Pages: 399-403

    • DOI

      10.1007/s12024-019-00128-z

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Protective effects of the Francisella tularensis ΔpdpC mutant against its virulent parental strain SCHU P9 in Cynomolgus macaques2019

    • Author(s)
      Deyu Tian, Akihiko Uda, Yasushi Ami, Akitoyo Hotta, Eun-sil Park, Noriyo Nagata, Naoko Iwata-Yoshikawa, Akio Yamada, Kazuhiro Hirayama, Kozue Miura, Yuki Koyama, Mika Azaki, Shigeru Morikawa
    • Journal Title

      Scientific Report

      Volume: 9 Issue: 1 Pages: 9193-9193

    • DOI

      10.1038/s41598-019-45412-8

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effective methods for the inactivation of Francisella tularensis2019

    • Author(s)
      Mika Azaki, Akihiko Uda, Deyu Tian, Katsuyoshi Nakazato, Akitoyo Hotta, Yasuhiro Kawai, Keita Ishijima, Yudai Kuroda, Ken Maeda, Shigeru Morikawa
    • Journal Title

      PLoS One

      Volume: 14 Issue: 11 Pages: e0225177-e0225177

    • DOI

      10.1371/journal.pone.0225177

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 特異的微生物種検出法としてのRPA法の有用性について2021

    • Author(s)
      大野貴代、中原弘明、藤浪良仁、武藤淳二
    • Organizer
      日本DNA多型学会第30回学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 国内分離Francisella hispaniensis KUMA-UJP1株に関する病原学的研究2020

    • Author(s)
      堀田明豊
    • Organizer
      第93回日本細菌学会総会
    • Related Report
      2019 Research-status Report
  • [Presentation] 次世代シーケンサーによる死後経過した感染臓器試料中のウイルス遺伝子の検出2019

    • Author(s)
      武藤(細川)淳二,岸本麻衣,藤浪良仁,中原弘明
    • Organizer
      第103次日本法医学会学術全国集会
    • Related Report
      2019 Research-status Report
  • [Presentation] 超微細高密度オゾン分子水による炭疽菌芽胞の迅速殺菌2019

    • Author(s)
      藤浪良仁,武藤淳二,岸本麻衣,中原弘明,松村栄治
    • Organizer
      第19回日本バイオセーフティ学会 総会・学術集会
    • Related Report
      2019 Research-status Report
  • [Presentation] 環境中におけるFrancisella属菌の生存性の検討2019

    • Author(s)
      堀田明豊,宇田晶彦,藤田 修,森川 茂,前田 健
    • Organizer
      第162回日本獣医学会学術集会
    • Related Report
      2019 Research-status Report
  • [Book] 別冊日本臨牀 領域別症候群シリーズ No.202021

    • Author(s)
      賀来敬仁、土屋真希、堀田明豊、ほか73名
    • Total Pages
      385
    • Publisher
      日本臨牀社
    • Related Report
      2021 Annual Research Report
  • [Book] 家畜伝染病ハンドブック2020

    • Author(s)
      村上 賢二、彦野 弘一、堀田 明豊、ほか45名
    • Total Pages
      304
    • Publisher
      朝倉書店
    • ISBN
      9784254460384
    • Related Report
      2020 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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