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MAPPs assay to elucidate the influences of the change of FcRn affinity on the antigen presentation.

Research Project

Project/Area Number 21K06705
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 47060:Clinical pharmacy-related
Research InstitutionNational Institute of Health Sciences

Principal Investigator

Suzuki Takuo  国立医薬品食品衛生研究所, 生物薬品部, 主任研究官 (10415466)

Co-Investigator(Kenkyū-buntansha) 橋井 則貴  国立医薬品食品衛生研究所, 生物薬品部, 室長 (20425672)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
KeywordsFcRn / 抗体医薬品 / 抗原提示 / MAPPs
Outline of Research at the Start

近年、新生児型Fc受容体(FcRn)親和性改変抗体や抗体薬物複合体(ADC)等のように、FcRn親和性が従来の抗体医薬品とは異なる、もしくは異なる可能性があるものが多く開発されつつある。FcRn親和性の違いは血中半減期に加え、抗体医薬品の体内分布や抗原提示にも広範な影響を及ぼすと考えられる。本研究では、MHC-Associated Peptide Proteomics (MAPPs)の手法を用い、FcRn親和性の違いが抗原提示に及ぼす影響について解明する。

Outline of Final Research Achievements

Therapeutic immunoglobulin G (IgG) antibodies have comparatively long half-lives because the neonatal Fc receptor (FcRn) binds to the IgG Fc at acidic pH in the endosome and protects IgG from degradation. To prolong the half-lives of therapeutic IgG antibodies and thereby reduce the required dose and frequency, amino acid-substituted antibodies having high affinity to FcRn are being developed and some antibodies have been approved. On the other hand, since FcRn is also considered to play important role in transcytosis of IgGs and trafficking of antigen-bearing IgGs in antigen-presenting cells, the biodistribution and the antigen presentation may be affected by FcRn affinity. In this study, the antigen presentation of FcRn-binding engineered antibodies was analyzed using MHC-associated peptide proteomics (MAPPs) assay.

Academic Significance and Societal Importance of the Research Achievements

近年FcRn親和性の異なる抗体医薬品が承認されてきているものの、FcRn親和性改変抗体の抗原提示については、不明な点が多い。本研究はMHC-Associated Peptide Proteomicsの手法を用いてFcRn親和性改変抗体の抗原提示を分析する研究であり、これまでの研究を大きく推進させ、新たな知見が得られることが期待される。本研究により得られる成果は、今後の効果的な抗体医薬品類の分子設計につながると共に、FcRn親和性の異なる医薬品の有効性、安全性に関する知見として非常に重要な意味を持つ。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (2 results)

All 2023

All Journal Article (2 results)

  • [Journal Article] 第1土曜特集 抗体医薬の進歩と課題 リード抗体取得・エンジニアリング技術 【IgG型抗体】 抗体の体内動態制御に関わる受容体FcRnをめぐる話題2023

    • Author(s)
      鈴木 琢雄、石井 明子
    • Journal Title

      医学のあゆみ

      Volume: 285 Issue: 10 Pages: 875-879

    • DOI

      10.32118/ayu28510875

    • ISSN
      0039-2359
    • Year and Date
      2023-06-03
    • Related Report
      2023 Annual Research Report
  • [Journal Article] FcRn等のFc受容体との親和性に着目した抗体エンジニアリング2023

    • Author(s)
      鈴木 琢雄
    • Journal Title

      Farumashia

      Volume: 59 Issue: 10 Pages: 908-913

    • DOI

      10.14894/faruawpsj.59.10_908

    • ISSN
      0014-8601, 2189-7026
    • Related Report
      2023 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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