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Rational design of poly(ethylene glycol) derivatives for reduction of antibody responses against poly(ethylene glycol)

Research Project

Project/Area Number 17K01393
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Biomedical engineering/Biomaterial science and engineering
Research InstitutionJikei University School of Medicine

Principal Investigator

Shiraishi Koichi  東京慈恵会医科大学, 医学部, 准教授 (40426284)

Co-Investigator(Kenkyū-buntansha) 横山 昌幸  東京慈恵会医科大学, 医学部, 教授 (20220577)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsポリエチレングリコール / 免疫原性 / 特異IgM抗体 / PEG / 高分子ブロックコポリマー / 抗体産生抑制 / 高分子界面制御 / 抗原抗体結合 / 免疫応答 / 生体工学 / 免疫学 / 抗体
Outline of Final Research Achievements

Poly(ethylene glycol) is one of the most useful synthetic polymers for biopharmaceutics. As well as protein PEGylation, nano-sized drug carriers (nanomedicines) use PEG for surface coverages to escape bindings from serum proteins. As a result of PEGylation on the surfaces, PEGylated nanomedicines exhibit long blood circulation characteristics. However, IgM antibodies against PEG (anti-PEG IgM) have been found in PEGylated nanomedicine, such as PEG-liposome- and PEGylated micelle-injected animals. We have found that anti-PEG IgM does not bind to the PEG chain, but bind to PEG-conjugates. This unique characteristic of anti-PEG antibodies may be a key to suppress antibody responses against PEG, therefore, we synthesized a series of new PEG-triblock copolymer possessing polyanion between a PEG and a hydrophobic block to reduce anti-PEG Ab responses. Reduction of anti-PEG Ab responses have been observed in a polyanion-chain-length dependent manner.

Academic Significance and Societal Importance of the Research Achievements

ポリエチレングリコール(PEG)は汎用性の高い高分子である。特に、医薬品としてのPEGはその水和効果によって、タンパク質やドラッグキャリアの血中半減期の向上やタンパク質の免疫原性の低減など、医薬品にとってのPEG化はゴールデンスタンダードであり、非常に有効な手段であることが知られている。しかしながら、近年、PEGに対する抗体(PEG特異抗体)が薬物キャリアによって産生されることが知られている。本研究は、PEGを用いながらPEGに対する特異抗体が抑制される新たなPEG分子を設計し、作製されたPEG分子を有する薬物キャリアが免疫原性を低減することを立証した。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (7 results)

All 2019 2018 2017

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

  • [Journal Article] Toxicity and immunogenicity concerns related to PEGylated-micelle carrier systems: a review2019

    • Author(s)
      Shiraishi Kouichi、Yokoyama Masayuki
    • Journal Title

      Science and Technology of Advanced Materials

      Volume: 20 Issue: 1 Pages: 324-336

    • DOI

      10.1080/14686996.2019.1590126

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Polyethylene glycol に対する免疫原生の抑制法の検討2018

    • Author(s)
      白石貢一、横山昌幸
    • Organizer
      第13回日本分子イメージング学会
    • Related Report
      2018 Research-status Report
  • [Presentation] 高分子の化学構造に基づくanti-PEG IgM抗体産生評価2018

    • Author(s)
      白石貢一、横山昌幸
    • Organizer
      第34回日本DDS学会学術集会
    • Related Report
      2018 Research-status Report
  • [Presentation] Evaluation of Hydrophobic Conjugate-dependent PEG-related Antibody Responses2018

    • Author(s)
      Kouichi Shiraishi, Masayuki Yokoyama
    • Organizer
      Controlled Release Society Annual Meeting and Exposition
    • Related Report
      2018 Research-status Report
  • [Presentation] PEGの免疫原性2018

    • Author(s)
      白石貢一
    • Organizer
      第68回医用高分子研究会
    • Related Report
      2017 Research-status Report
  • [Presentation] PEGに対する抗体産生と抑制に関する研究2017

    • Author(s)
      白石貢一
    • Organizer
      日本バイオマテリアル学会
    • Related Report
      2017 Research-status Report
  • [Book] Clinical Diagnostic Imaging2018

    • Author(s)
      Shiraishi Kouichi Yokoyama Masayuki
    • Total Pages
      24
    • Publisher
      Springer, Singapore
    • Related Report
      2018 Research-status Report

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Published: 2017-04-28   Modified: 2024-01-30  

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