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Precise characterizations of degradation products and assessment of their impact on the biological environments

Planned Research

Project AreaPrecision Degradation of Polymer and Polymeric Material
Project/Area Number 20H05735
Research Category

Grant-in-Aid for Transformative Research Areas (B)

Allocation TypeSingle-year Grants
Review Section Transformative Research Areas, Section (II)
Research InstitutionKyoto University

Principal Investigator

Numata Keiji  京都大学, 工学研究科, 教授 (40584529)

Project Period (FY) 2020-10-02 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥37,050,000 (Direct Cost: ¥28,500,000、Indirect Cost: ¥8,550,000)
Fiscal Year 2022: ¥12,350,000 (Direct Cost: ¥9,500,000、Indirect Cost: ¥2,850,000)
Fiscal Year 2021: ¥12,350,000 (Direct Cost: ¥9,500,000、Indirect Cost: ¥2,850,000)
Fiscal Year 2020: ¥12,350,000 (Direct Cost: ¥9,500,000、Indirect Cost: ¥2,850,000)
Keywords生分解性高分子 / オリゴマー / 細胞毒性 / 環境毒性 / 高分子精密分解 / 生分解性ポリエステル / 高分子の生分解
Outline of Research at the Start

本研究では、物理劣化・崩壊、化学分解、および生分解により生じる、主としてメソスケールおよびそれ以下の分解産物の形態、組成、および構造を解析し、自然環境中の生物や生体などに与える生物的影響を明らかにする。分解産物の評価は、形態観察、結晶性および構造評価、構造解析、質量分析や分子量および分子量分布評価を行う。さらに、分解物が自然環境へ与える影響を評価する観点から、分解物の毒性試験をモデル動物への生育阻害(急性毒性)や繁殖への影響(長期毒性)として評価する。高分子材料の分解産物が分子として、どのように自然環境に還元されるか学術的に明確な回答を示す。

Outline of Final Research Achievements

Biodegradable polymers are eco-friendly materials and have attracted attention for use in a sustainable society because they are not accumulated in the environment. Although the characteristics of biodegradable polymers have been assessed well, the effects of their degradation products have not. Herein, we comprehensively evaluated the chemical toxicities of a biodegradable polyester, polycaprolactone (PCL), and synthetic oligocaprolactones (OCLs) with different degrees of polymerization. These results highlight the need for a further understanding of the effects of the degradation products resulting from biodegradable polyesters to ensure a genuinely sustainable society.

Academic Significance and Societal Importance of the Research Achievements

生分解性高分子は環境循環型の素材であり、環境中に蓄積しないことから持続可能な社会への利用が注目されている。 生分解性高分子の特性は十分に評価されてきたが、その分解生成物の影響は、十分に評価されているとは言い難い。 本研究の結果は、生分解性ポリエステルからの分解生成物が異常に高濃度の環境では、さまざまな生物に影響を示す可能性があることを示しており、真に環境に優しい材料を開発するには、オリゴマーの毒性と環境への影響に関する斬新で厳格な評価が必要である。また、これらの結果は、生分解性ポリエステルから生じる分解生成物の影響をさらに理解する必要があることを明示している。

Report

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

    (12 results)

All 2023 2021 2020 Other

All Journal Article (11 results) (of which Peer Reviewed: 5 results,  Open Access: 3 results) Remarks (1 results)

  • [Journal Article] Effect of Oligomers Derived from Biodegradable Polyesters on Eco- and Neurotoxicity2023

    • Author(s)
      Yoshinaga Naoto、Tateishi Ayaka、Kobayashi Yasuaki、Kubo Tomohiro、Miyakawa Hitoshi、Satoh Kotaro、Numata Keiji
    • Journal Title

      Biomacromolecules

      Volume: tbd Issue: 6 Pages: 2721-2729

    • DOI

      10.1021/acs.biomac.3c00160

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Xanthurenic Acid Is the Main Pigment of Trichonephila clavata Gold Dragline Silk2021

    • Author(s)
      Fujiwara Masayuki、Kono Nobuaki、Hirayama Akiyoshi、Malay Ali D.、Nakamura Hiroyuki、Ohtoshi Rintaro、Numata Keiji、Tomita Masaru、Arakawa Kazuharu
    • Journal Title

      Biomolecules

      Volume: 11 Issue: 4 Pages: 563-563

    • DOI

      10.3390/biom11040563

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Endosome-escaping micelle complexes dually equipped with cell-penetrating and endosome-disrupting peptides for efficient DNA delivery into intact plants2021

    • Author(s)
      Miyamoto Takaaki、Tsuchiya Kousuke、Numata Keiji
    • Journal Title

      Nanoscale

      Volume: 13 Issue: 11 Pages: 5679-5692

    • DOI

      10.1039/d0nr08183c

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Synthetic Mitochondria-Targeting Peptides Incorporating α-Aminoisobutyric Acid with a Stable Amphiphilic Helix Conformation in Plant Cells2021

    • Author(s)
      Kayo Terada, Joan Gimenez-Dejoz, Taichi Kurita, Kazusato Oikawa, Hirotaka Uji, Kousuke Tsuchiya, and Keiji Numata
    • Journal Title

      ACS Biomaterials SCIENCE & ENGINEERING

      Volume: 7(4) Issue: 4 Pages: 1475-1484

    • DOI

      10.1021/acsbiomaterials.0c01533

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Lipid Membrane Interaction of Peptide/DNA Complexes Designed for Gene Delivery2021

    • Author(s)
      Yilmaz Neval、Kodama Yutaka、Numata Keiji
    • Journal Title

      Langmuir

      Volume: 37 Issue: 5 Pages: 1882-1893

    • DOI

      10.1021/acs.langmuir.0c03320

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Mitochondrial movement during its association with chloroplasts in Arabidopsis thaliana2021

    • Author(s)
      Oikawa Kazusato、Imai Takuto、Thagun Chonprakun、Toyooka Kiminori、Yoshizumi Takeshi、Ishikawa Kazuya、Kodama Yutaka、Numata Keiji
    • Journal Title

      Communications Biology

      Volume: 4 Issue: 1 Pages: 1-13

    • DOI

      10.1038/s42003-021-01833-8

    • NAID

      120006993844

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Crystallization-induced mechanofluorescence for visualization of polymer crystallization2021

    • Author(s)
      Kato Sota、Furukawa Shigeki、Aoki Daisuke、Goseki Raita、Oikawa Kazusato、Tsuchiya Kousuke、Shimada Naohiko、Maruyama Atsushi、Numata Keiji、Otsuka Hideyuki
    • Journal Title

      Nature Communications

      Volume: 12 Issue: 1 Pages: 1-7

    • DOI

      10.1038/s41467-020-20366-y

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Special issue: CO2: capture of, utilization of, and degradation into2021

    • Author(s)
      Nakano Koji、Hoshino Yu、Numata Keiji、Tanaka Keiji
    • Journal Title

      Polymer Journal

      Volume: 53 Issue: 1 Pages: 1-2

    • DOI

      10.1038/s41428-020-00427-1

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Peptide-Based Polyion Complex Vesicles That Deliver Enzymes into Intact Plants To Provide Antibiotic Resistance without Genetic Modification2020

    • Author(s)
      Fujita Seiya、Motoda Yoko、Kigawa Takanori、Tsuchiya Kousuke、Numata Keiji
    • Journal Title

      Biomacromolecules

      Volume: 22 Issue: 3 Pages: 1080-1090

    • DOI

      10.1021/acs.biomac.0c01380

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Microbial prospection of an Amazonian blackwater lake and whole-genome sequencing of bacteria capable of polyhydroxyalkanoate synthesis2020

    • Author(s)
      Castro Lorena M.、Foong Choon Pin、Higuchi-Takeuchi Mieko、Morisaki Kumiko、Lopes Eraldo F.、Numata Keiji、Mota Adolfo J.
    • Journal Title

      Polymer Journal

      Volume: 53 Issue: 1 Pages: 191-202

    • DOI

      10.1038/s41428-020-00424-4

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Aqueous spinning system with a citrate buffer for highly extensible silk fibers2020

    • Author(s)
      Chen Jianming、Ohta Yoshinori、Nakamura Hiroyuki、Masunaga Hiroyasu、Numata Keiji
    • Journal Title

      Polymer Journal

      Volume: 53 Issue: 1 Pages: 179-189

    • DOI

      10.1038/s41428-020-00419-1

    • Related Report
      2020 Annual Research Report
  • [Remarks] 学術変革領域B 高分子精密分解

    • URL

      http://pixy.polym.kyoto-u.ac.jp/pd/pd_index.html

    • Related Report
      2020 Annual Research Report

URL: 

Published: 2020-10-30   Modified: 2024-01-30  

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