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Improvement of protein expression by Escherichia coli based on the structure of anti-P2X4 antibody Fab and development of its additional function.

Research Project

Project/Area Number 21K06517
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 47020:Pharmaceutical analytical chemistry and physicochemistry-related
Research InstitutionInternational University of Health and Welfare

Principal Investigator

Abe Yoshito  国際医療福祉大学, 福岡薬学部, 教授 (60315091)

Co-Investigator(Kenkyū-buntansha) 山下 智大  九州大学, 薬学研究院, 講師 (30645635)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords抗P2X4抗体 / タンパク質工学 / タンパク質化学 / 大腸菌発現 / 抗体工学 / 大腸菌発現系 / Fab / P2X4受容体
Outline of Research at the Start

低分子化抗体Fabは安定性、抗原親和性が優れており、抗体医薬品の次世代フォーマットとして期待されている。Fabは大腸菌発現から得られたリコンビナントが医薬品にも使われているが、リコンビナントFabは各抗体依存的に発現量が少ないものも多い。そこで我々は大腸菌発現系で調製した可溶性抗P2X4抗体Fabのアミノ酸変異を行い、大腸菌発現量の理論的な改良を目指す。さらに調製したFab を利用し、痛みのターゲット分子であるP2X4受容体の機能抑制を目標とした酵素とのコンジュゲート抗体の調製および評価を行う。また抗体医薬品において問題となっている凝集抑制を目的とした糖鎖付加法の開発を行う。

Outline of Final Research Achievements

We established a method to prepare soluble anti-P2X4 Fab from Escherichia coli without using a time-consuming and laborious refolding system, and found that the amount of soluble Fab recovered increased 6-7-fold in H-S35AFab, where the H-chain Ser35 was mutated to alanine, without altering binding affinity. In this study, we investigated the cause of the increased expression of H-S35AFab by mutating Ser35 in the H-chain, as well as the changes in structure and stability. As a result, we discovered that the expression level of antibody Fab depends on the hydrophobicity of the 35th amino acid side chain of the H-chain, and that stability and expression level are not generally proportional. Additionally, we attempted to prepare functional antibodies by chemically cross-linking mutants of antibody Fab with cysteine and ATP-hydrolysing enzymes, and by adding sugar chains or polyethylene glycols to antibodies to inhibit aggregation.

Academic Significance and Societal Importance of the Research Achievements

低分子化抗体Fabは安定性、抗原親和性が優れており、抗体医薬品の次世代フォーマットとして期待されている。Fabは大腸菌発現から得られたリコンビナントが医薬品にも使われているが、リコンビナントFabは各抗体依存的に発現量が少ないものも多い。よってアミノ酸変異を用いて、大腸菌発現量を理論的にコントロールできれば抗体製剤の発展に繋がっていく可能性があると考え、本研究を行った。

Report

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

    (9 results)

All 2023 2022 2021 Other

All Int'l Joint Research (1 results) Journal Article (4 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (4 results)

  • [Int'l Joint Research] チュラロンコン大学(タイ)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Oligomeric state of the N-terminal domain of DnaT for replication restart in Escherichia coli2023

    • Author(s)
      Inoue Shogo、Ikeda Yohei、Fujiyama Saki、Ueda Tadashi、Abe Yoshito
    • Journal Title

      Biochimica et Biophysica Acta (BBA) - Proteins and Proteomics

      Volume: 1871 Issue: 5 Pages: 140929-140929

    • DOI

      10.1016/j.bbapap.2023.140929

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Improvement of the affinity of an anti-rat P2X4 receptor antibody by introducing electrostatic interactions2022

    • Author(s)
      Shinozaki Chinatsu、Kohno Keita、Shiroishi Mitsunori、Takahashi Daisuke、Yoshikawa Yu、Abe Yoshito、Hamase Kenji、Nakakido Makoto、Tsumoto Kohei、Inoue Kazuhide、Tsuda Makoto、Ueda Tadashi
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 131-131

    • DOI

      10.1038/s41598-021-03784-w

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Expression and Functional Evaluation of Recombinant Anti-receptor Activator of Nuclear Factor Kappa-B Ligand Monoclonal Antibody Produced in Nicotiana benthamiana2021

    • Author(s)
      Boonyayothin Wanuttha、Sinnung Sirorut、Shanmugaraj Balamurugan、Abe Yoshito、Strasser Richard、Pavasant Prasit、Phoolcharoen Waranyoo
    • Journal Title

      Frontiers in Plant Science

      Volume: 12 Pages: 683417-683417

    • DOI

      10.3389/fpls.2021.683417

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Functional Characterization of Pembrolizumab Produced in Nicotiana benthamiana Using a Rapid Transient Expression System2021

    • Author(s)
      Phakham Tanapati、Bulaon Christine Joy I.、Khorattanakulchai Narach、Shanmugaraj Balamurugan、Buranapraditkun Supranee、Boonkrai Chatikorn、Sooksai Sarintip、Hirankarn Nattiya、Abe Yoshito、Strasser Richard、Rattanapisit Kaewta、Phoolcharoen Waranyoo
    • Journal Title

      Frontiers in Plant Science

      Volume: 12 Pages: 736299-736299

    • DOI

      10.3389/fpls.2021.736299

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 立体構造を基盤としたantiP2X4抗体Fab生産法の改良2023

    • Author(s)
      阿部義人
    • Organizer
      第13回国際医療福祉大学学会学術大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 抗P2X4抗体Fabの立体構造を基盤とした大腸菌発現系の改良2023

    • Author(s)
      阿部義人, 御供田将士, 植田正
    • Organizer
      第23回日本蛋白質科学年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 立体構造を基盤としたantiP2X4抗体Fab生産法の改良2022

    • Author(s)
      阿部義人
    • Organizer
      第12回国際医療福祉大学学会学術大会
    • Related Report
      2022 Research-status Report
  • [Presentation] ATP受容体P2X4の機能を抑制する誘導体化抗体の創製2021

    • Author(s)
      阿部義人
    • Organizer
      第11回国際医療福祉大学学会学術大会
    • Related Report
      2021 Research-status Report

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

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