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Development of an early diagnosis of Creutzfeldt-Jakob disease using easily collected specimens

Research Project

Project/Area Number 20K07807
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52010:General internal medicine-related
Research InstitutionUniversity of Miyazaki

Principal Investigator

MORI Tsuyoshi  宮崎大学, 医学部, 助教 (40426565)

Co-Investigator(Kenkyū-buntansha) 佐藤 克也  長崎大学, 医歯薬学総合研究科(保健学科), 教授 (70398147)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords孤発性CJD / QUIC法 / プリオン病 / プリオン高感度検出法
Outline of Research at the Start

現在のところ、プリオン病患者およびレビー小体型認知症患者の診断基準はあるが、確定診断ではない。また、いずれの疾患も国内外通して根本的な治療法はない。RT-QUIC法は、試験管内微量プリオン検出法として当研究室の新博士らが発表し、今現在もRT-QUIC法を応用・改良した方法が発表されている。本研究では、さらに微量の異常型PrPを検出する高感度型RT-QUIC法を構築することで初期症状患者の診断を可能とする検査法の確立を目指す。

Outline of Final Research Achievements

Prion diseases are fatal neurodegenerative disorders for which there is currently no effective treatment or early diagnosis. The Real Time Quaking-Induced Conversion (RT-QUIC) reaction is a highly sensitive assay system that can detect abnormal PrP in the brain and spinal fluid of prion disease patients. The aim of this study was to develop an advanced RT-QUIC assay to detect even smaller amounts of abnormal PrP. Increase the sensitivity of the RT-QUIC assay by concentrating trace amounts of abnormal PrP from large volume or high concentration samples. We hope that this new assay will make it possible to make diagnoses using blood and other body fluids from patients with early symptoms.

Academic Significance and Societal Importance of the Research Achievements

急速な神経細胞変性をきたす致死性の疾患、プリオン病。その代表的な病気である孤発性クロイツフェルト・ヤコブ病(CJD)は発症早期に正確に診断することが臨床現場から切望されている。ここで高濃度の血清に混合させたCJD罹患者脳乳剤から異常型プリオン蛋白が分離濃縮され、RT-QUIC法により検出できたことは、脳脊髄液以外の採取容易な血液等の検体からの診断且つ早期診断確立において大きな意義があると考える。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (6 results)

All 2022 2021 2020

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 5 results) Presentation (1 results)

  • [Journal Article] Pentosan polysulfate induces low-level persistent prion infection keeping measurable seeding activity without PrP-res detection in Fukuoka-1 infected cell cultures2022

    • Author(s)
      Takatsuki H, Imamura M, Mori T, Atarashi R.
    • Journal Title

      Sci Rep.

      Volume: - Issue: 1 Pages: 7923-7923

    • DOI

      10.1038/s41598-022-12049-z

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Spontaneous generation of distinct prion variants with recombinant prion protein from a baculovirus-insect cell expression system2022

    • Author(s)
      Imamura M, Tabeta N, Iwamaru Y, Takatsuki H, Mori T, Atarashi R.
    • Journal Title

      Biochem Biophys Res Commun .

      Volume: 613 Pages: 67-72

    • DOI

      10.1016/j.bbrc.2022.04.137

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Ethanolamine Is a New Anti-Prion Compound2021

    • Author(s)
      Uchiyama Keiji、Hara Hideyuki、Chida Junji、Pasiana Agriani Dini、Imamura Morikazu、Mori Tsuyoshi、Takatsuki Hanae、Atarashi Ryuichiro、Sakaguchi Suehiro
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 22 Issue: 21 Pages: 11742-11742

    • DOI

      10.3390/ijms222111742

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Discrimination between L-type and C-type bovine spongiform encephalopathy by the strain-specific reactions of real-time quaking-induced conversion2020

    • Author(s)
      Ubagai Kaori、Fukuda Shigeo、Mori Tsuyoshi、Takatsuki Hanae、Taguchi Yuzuru、Kageyama Soichi、Nishida Noriyuki、Atarashi Ryuichiro
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 526 Issue: 4 Pages: 1049-1053

    • DOI

      10.1016/j.bbrc.2020.03.183

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Administration of FK506 from Late Stage of Disease Prolongs Survival of Human Prion-Inoculated Mice2020

    • Author(s)
      Takehiro Nakagaki, Daisuke Ishibashi, Tsuyoshi Mori, Yukiko Miyazaki, Hanae Takatsuki, Hiroya Tange, Yuzuru Taguchi, Katsuya Satoh, Ryuichiro Atarashi, Noriyuki Nishida
    • Journal Title

      Neurotherapeutics

      Volume: 17(4) Issue: 4 Pages: 1850-1860

    • DOI

      10.1007/s13311-020-00870-1

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] ヒトグリオーマ細胞におけるプリオン感染動態の解析2021

    • Author(s)
      森 剛志、今村 守一、髙月 英恵、井口 洋美、大野 美奈子、新 竜一郎
    • Organizer
      第68回に本ウイルス学会学術集会
    • Related Report
      2021 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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