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Trace detection based on concentrated reaction field in porous particle

Research Project

Project/Area Number 21K14650
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 34020:Analytical chemistry-related
Research InstitutionUniversity of Tsukuba

Principal Investigator

Miyagawa Akihisa  筑波大学, 数理物質系, 助教 (80881599)

Project Period (FY) 2021-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Keywords微量計測 / 顕微分光 / マイクロ粒子 / DNA / 細孔性粒子 / タンパク質 / 細孔濃縮 / シリカ粒子 / 酵素反応計測 / DNA計測
Outline of Research at the Start

有機分子が溶解した水溶液中に細孔性粒子を入れると、有機分子は細孔内に分配・吸着する。マイクロサイズの粒子はpL-fLの体積を有しているため、この過程で有機分子は数百-数千倍に濃縮される。この微小空間内の高濃縮溶液は反応場として有用であるにも関わらず、有効的に活用されていない。そこで本研究では、単一粒子系における顕微分光計測系を構築し、粒子細孔内の濃縮場を利用した新規微量計測法の開発を目的としている。具体的には酵素を利用した微量計測、DNAの触媒増幅反応を利用した計測法を行う。

Outline of Final Research Achievements

We have demonstrated that horseradish peroxidase (HRP) is concentrated several hundred-fold in silica particles, and single-stranded and duplex DNA are concentrated by approximately a thousand-fold. Using this concentration reaction field, we have shown the ability to quantify hydrogen peroxide at a concentration of 980 nM in a single-particle system. Additionally, we have elucidated the diffusion behavior of single-stranded and duplex DNA within the pores of silica particles. Single-stranded DNA tends to be distributed as aggregates within the particles, while duplex DNA readily dissociates inside the particles. By concentrating hairpin-type DNA within the particles and detecting target DNA based on the cleavage reaction of hairpin NDA, we have demonstrated the quantification of target DNA at a concentration of 10 nM in a single-particle system.

Academic Significance and Societal Importance of the Research Achievements

本研究では、シリカ粒子内に濃縮された分子を利用した計測原理を確立させた。その濃縮倍率などを定量的に議論している研究例はなく、学術的に意義深い。また、単一粒子系で顕微分光法によって計測を行うことにより、高感度な計測が可能となる。本計測法はレーザートラップやマイクロデバイスと親和性が高く、組み合わせることで簡便な検出システムを構築できるため、社会的貢献も見込める。また、DNAの粒子内の拡散挙動はクロマトグラフィーの分離機構を明らかにするための基礎知見となり、当該分野での学術的寄与を期待できる。

Report

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

    (12 results)

All 2023 2022 2021

All Journal Article (7 results) (of which Peer Reviewed: 7 results) Presentation (5 results)

  • [Journal Article] Two-Step Modification of Proteins onto Microparticle Surface Using DMT-MM Condensation Agent2023

    • Author(s)
      Miyagawa Akihisa、Ueda Yasuyuki、Hagiya Kenta、Nagatomo Shigenori、Nakatani Kiyoharu
    • Journal Title

      Bulletin of the Chemical Society of Japan

      Volume: 96 Issue: 2 Pages: 95-97

    • DOI

      10.1246/bcsj.20220315

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Thermodynamic complexation mechanism of zinc ion with 8-hydroxyquinoline-5-sulfonic acid in molecular crowding environment2023

    • Author(s)
      Miyagawa Akihisa、Komatsu Hiroyuki、Nagatomo Shigenori、Nakatani Kiyoharu
    • Journal Title

      Journal of Molecular Liquids

      Volume: 372 Pages: 121181-121181

    • DOI

      10.1016/j.molliq.2022.121181

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Direct Quantification of Proteins Modified on a Polystyrene Microparticle Surface Based on ζ Potential Change2022

    • Author(s)
      Hagiya Kenta、Miyagawa Akihisa、Nagatomo Shigenori、Nakatani Kiyoharu
    • Journal Title

      Analytical Chemistry

      Volume: 94 Issue: 16 Pages: 6304-6310

    • DOI

      10.1021/acs.analchem.2c00457

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Acid Dissociation Behavior of 8-Hydroxyquinoline-5-Sulfonic Acid in Molecular Crowding Environment Modeled Using Polyethylene Glycol2022

    • Author(s)
      Miyagawa Akihisa、Komatsu Hiroyuki、Nagatomo Shigenori、Nakatani Kiyoharu
    • Journal Title

      Journal of Molecular Liquids

      Volume: 360 Pages: 119526-119526

    • DOI

      10.1016/j.molliq.2022.119526

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] J-aggregation of 5, 10, 15, 20-tetraphenyl-21H, 23H-porphinetetrasulfonic acid in a molecular crowding environment simulated using dextran2022

    • Author(s)
      Miyagawa Akihisa、Nakatani Kiyoharu
    • Journal Title

      Analytical Sciences

      Volume: 38 Issue: 12 Pages: 1505-1512

    • DOI

      10.1007/s44211-022-00185-5

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Distribution Behavior of Single-Stranded DNA Molecules in an Amino-Group-Functionalized Silica Microparticle2022

    • Author(s)
      Miyagawa Akihisa、Ide Ryosuke、Nagatomo Shigenori、Nakatani Kiyoharu
    • Journal Title

      Langmuir

      Volume: 38 Issue: 27 Pages: 8462-8468

    • DOI

      10.1021/acs.langmuir.2c01062

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of Molecular Crowding on Complexation of Metal Ions and 8-Quinolinol-5-Sulfonic Acid2021

    • Author(s)
      Miyagawa Akihisa、Komatsu Hiroyuki、Nagatomo Shigenori、Nakatani Kiyoharu
    • Journal Title

      The Journal of Physical Chemistry B

      Volume: 125 Issue: 34 Pages: 9853-9859

    • DOI

      10.1021/acs.jpcb.1c05851

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] ポリスチレン粒子表面修飾によるゼータ電位変化に基づいたタンパク質の微量計測2022

    • Author(s)
      萩谷 健太; 宮川 晃尚; 長友 重紀; 中谷 清治
    • Organizer
      第82回分析化学討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 分子クラウディング環境下でのオキシン錯形成反応の熱力学的評価2022

    • Author(s)
      小松弘幸; 宮川 晃尚; 長友重紀; 中谷清治
    • Organizer
      第82回分析化学討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] DNAのアミノ修飾シリカ粒子細孔内における拡散挙動の評価2022

    • Author(s)
      宮川 晃尚; 井手亮佑; 長友重紀; 中谷清治
    • Organizer
      第82回分析化学討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] オキシン錯形成反応における分子クラウディング効果の熱力学的評価2022

    • Author(s)
      小松弘幸; 宮川 晃尚; 長友重紀; 中谷清治
    • Organizer
      日本分析化学会第71年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] ゼータ電位計測による粒子表面へのタンパク質吸着挙動の評価2022

    • Author(s)
      萩谷健太; 宮川 晃尚; 長友重紀; 中谷清治
    • Organizer
      日本分析化学会第71年会
    • Related Report
      2022 Annual Research Report

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Published: 2021-04-28   Modified: 2024-01-30  

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