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Development of a hemodiagnosis for ALS based on the seeding reaction induced by misfolded proteins

Research Project

Project/Area Number 21K19456
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 52:General internal medicine and related fields
Research InstitutionNihon University

Principal Investigator

TOKUDA Eiichi  日本大学, 薬学部, 講師 (00757510)

Co-Investigator(Kenkyū-buntansha) 原 誠  日本大学, 医学部, 准教授 (10817224)
中嶋 秀人  日本大学, 医学部, 教授 (20330095)
Project Period (FY) 2021-07-09 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2022: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2021: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywords筋萎縮性側索硬化症 / 血液診断 / 早期発見 / 異常型タンパク質 / シーディング / ホフマイスターイオン
Outline of Research at the Start

本研究では、筋萎縮性側索硬化症 (ALS) の早期発見を可能とする血液診断法の開発に挑戦する。異常型タンパク質が正常型タンパク質の構造異常を誘発する「シーディング現象」を利用し、ALSの罹患が疑われた時点で採取した「病初期」の血液に含まれる極微量な異常型タンパク質を増幅させる。ALS患者における増幅パターンとの比較を通じて、本法がALS診断法として妥当か判断する。本手法は、確定診断に年単位の時間を要する従来の手法と比較し、診断に迅速化をもたらし、ALSの早期発見・早期治療に貢献すると期待できる。

Outline of Final Research Achievements

The aim of the present study was to develop a hemodiagnosis for amyotrophic lateral sclerosis (ALS) that can contribute to the early detection of patients with ALS. In the development, we focused on the seeding reaction where a misfolded protein acts as a conformational template to indues the conversion of a folded protein into its misfolding. The reaction can amplify as little as a misfolded protein, which will be advantage in the development of an ALS hemodiagnosis. We found that the ALS-related misfolded protein was amplified with as little as 0.1 pmol/L under the existence of a certain Hofmeister’s ion.

Academic Significance and Societal Importance of the Research Achievements

神経変性疾患の研究領域において、夾雑物質が豊富に含まれる血液中では、異常型タンパク質はシーディングを誘発できないと考えられており、当該分野では、脳脊髄液を対象にバイオマーカー探索が行われてきた。本研究では、既存のコンセンサスの打破に挑戦し、極微量な異常型タンパク質が血液の夾雑環境においても、シードとして機能できるアッセイ系の開発に成功した。本研究で開発したアッセイ系は、原理的には血中に存在する様々な異常型タンパク質のシード機能の評価にも適応できると考えられ、汎用性が高く、幅広い学術分野に波及効果のある手法と言える。

Report

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

    (11 results)

All 2023 2022 2021 Other

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (6 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results) Remarks (1 results)

  • [Journal Article] FUS regulates RAN translation through modulating the G-quadruplex structure of GGGGCC repeat RNA in C9orf72-linked ALS/FTD2023

    • Author(s)
      Fujino Yuzo、Ueyama Morio、Ishiguro Taro、Ozawa Daisaku、Sugiki Toshihiko、Ito Hayato、Murata Asako、Ishiguro Akira、Gendron Tania F.、Mori Kohji、Tokuda Eiichi、Taminato Tomoya、Konno Takuya、Koyama Akihide、Kawabe Yuya et al.
    • Journal Title

      eLife

      Volume: 12

    • DOI

      10.7554/elife.84338.1

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A Metal-Free, Disulfide Oxidized Form of Superoxide Dismutase 1 as a Primary Misfolded Species with Prion-Like Properties in the Extracellular Environments Surrounding Motor Neuron-Like Cells2021

    • Author(s)
      Takashima Chika、Kosuge Yasuhiro、Inoue Masahisa、Ono Shin-Ichi、Tokuda Eiichi
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 22 Issue: 8 Pages: 4155-4155

    • DOI

      10.3390/ijms22084155

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Stagnation of glymphatic interstitial fluid flow and delay in waste clearance in the SOD1-G93A mouse model of ALS2021

    • Author(s)
      Hirose Mikako、Asano Mito、Watanabe-Matsumoto Saori、Yamanaka Koji、Abe Yoichiro、Yasui Masato、Tokuda Eiichi、Furukawa Yoshiaki、Misawa Hidemi
    • Journal Title

      Neuroscience Research

      Volume: 171 Pages: 74-82

    • DOI

      10.1016/j.neures.2020.10.006

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Apoptotic Effects of a Thioether Analog of Vitamin K3 in a Human Leukemia Cell Line2021

    • Author(s)
      Asami Satoru、Suzuki Mikana、Nakayama Toshimitsu、Shimoda Yasuyo、Miura Motofumi、Kato Koichi、Tokuda Eiichi、Ono Shinichi、Kawakubo Takashi、Nishizawa Kenji、Yamanaka Kenzo、Suzuki Takashi
    • Journal Title

      International Journal of Toxicology

      Volume: 40 Issue: 6 Pages: 517-529

    • DOI

      10.1177/10915818211047992

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Zn未結合型SOD1を認識する市販ミスフォールドSOD1抗体MS7852023

    • Author(s)
      徳田 栄一、阪下 優芽、山老 直哉
    • Organizer
      日本薬学会 第143年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Zinc-binding metallothionein inhibits the SOD1 aggregation via binding of core regions for aggregate growth2022

    • Author(s)
      Eiichi Tokuda、Maiko Keima、Chiako Ikeda、Yasuhiro Kosuge、Shin-ichi Ono
    • Organizer
      Neuro2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ALS病因タンパク質の凝集化を抑制するZn結合型メタロチオネイン2022

    • Author(s)
      徳田 栄一、桂馬 茉衣子、池田知亜子、小菅 康弘、小野 真一
    • Organizer
      日本薬学会 第142年会
    • Related Report
      2021 Research-status Report
  • [Presentation] 神経難病ALSの創薬標的としてのメタロチオネイン: ALS関連タンパク質の凝集抑制作用2022

    • Author(s)
      徳田栄一
    • Organizer
      千葉エリア産官学公金共創イノベーションネットワーク 第1回産官学公金マッチングシンポジウム
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] A conformational feature of extracellular misfolded SOD1 with prion-like properties in the extracellular environment surrounding motor neuron-like cells2021

    • Author(s)
      Eiichi Tokuda, Chika Takashima, Yasuhiro Kosuge, Masahisa Inoue, and Shin-ichi Ono
    • Organizer
      第44回 日本神経科学大会 CJK第1回国際会議
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 神経変性疾患ALSに対するメタロチオネインの防御作用: SOD1タンパク質の凝集化抑制2021

    • Author(s)
      徳田栄一, 桂馬茉衣子, 池田知亜子, 小野真一
    • Organizer
      第47回 日本毒性学会学術年会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Remarks] 日本大学薬学部ホームページ

    • URL

      https://www.pha.nihon-u.ac.jp/

    • Related Report
      2021 Research-status Report

URL: 

Published: 2021-07-13   Modified: 2024-01-30  

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