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Utilization of chromosomal instability in CHO cells in recombinant protein production

Research Project

Project/Area Number 19K21105
Project/Area Number (Other) 18H05940 (2018)
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund (2019)
Single-year Grants (2018)
Review Section 0401:Materials engineering, chemical engineering, and related fields
Research InstitutionOsaka University

Principal Investigator

Yamano Noriko  大阪大学, 工学研究科, 助教 (20582795)

Project Period (FY) 2018-08-24 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords組換えタンパク質生産 / CHO細胞 / 宿主細胞 / 染色体不安定性 / 染色体不分離 / 染色体異数性 / トランスクリプトーム / 抗体生産 / 安定染色体 / 動物細胞
Outline of Research at the Start

Chinese hamster ovary(CHO)細胞はバイオ医薬品の主要な宿主細胞である。CHO細胞の染色体は変化しやすく、培養を続けることで、自然に組換えや本数分布が生じる。本研究では、これまで注目されてこなかった染色体不安定性の利用に着目した研究開発を行っている。一般的には安定な細胞を取得するのが通常の中、本課題は染色体不安定性を積極的に利用する試みであり、独創的である。

Outline of Final Research Achievements

It was suggested that the amount of mRNA required per amount of protein produced was low in CHO cells with a high chromosome number isolated naturally. From the karyotype analysis, the average number of each chromosome was calculated, and stable chromosomes with low fluctuation values were identified. Next, chromosome aneuploidy was artificially induced and clones with significantly increased chromosome number were isolated. When these cells were tested for production, high productivity tended to be obtained when cells with a high chromosome number were used as a host. When the antibody gene was introduced into the obtained cell line, the specific production rate of the IgG1 antibody was about 65 times higher, that of the IgG3 antibody about 7 times higher, that of the bispecific antibody about 33 times higher, and that of the triple-specific antibody about 3 times higher than when the cell without aneuploidy induction was used as the host.

Academic Significance and Societal Importance of the Research Achievements

バイオ医薬品を生産する各製薬企業において、CHO細胞の染色体不安定性への関心は高い。一方で、CHO細胞の染色体の安定性に着目した研究は行われているものの、染色体不安定性を積極的に活用するような研究は行われていない。一言で染色体不安定性とは言え、共通して安定な染色体が存在しており、その不安定性・安定性は染色体毎に異なることが示された。染色体不安定性を誘導、利用しつつ、発現させたい遺伝子はゲノム編集技術を用いて安定な染色体に導入することで、高生産で安定な生産株構築が可能となれば、染色体不安定性を臆することなく、むしろ積極的に利用するという選択肢が増えるのではないかと考える。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Annual Research Report
  • Research Products

    (13 results)

All 2020 2019 2018

All Journal Article (3 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (10 results) (of which Int'l Joint Research: 6 results)

  • [Journal Article] The effect of telomere sequences on chromosomal translocations2020

    • Author(s)
      Jun Ho Lee, Wataru Tanaka, Noriko Yamano-Adachi, Yuichi Koga, Takeshi Omasa
    • Journal Title

      BMC Proceedings 2020

      Volume: 14(Suppl 5) Issue: S5 Pages: 16-17

    • DOI

      10.1186/s12919-020-00188-y

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 組換えタンパク質生産における染色体不安定性の利用2020

    • Author(s)
      山野-足立 範子
    • Journal Title

      月刊「細胞」2020年7月号 特集 染色体医工学

      Volume: 52 Pages: 39-42

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Characterization of Chinese hamster ovary cells with disparate chromosome numbers: Reduction of the amount of mRNA relative to total protein2020

    • Author(s)
      NorikoYamano-Adachi, Norichika Ogata, Sho Tanaka, Masayoshi Onitsuka, Takeshi Omasa
    • Journal Title

      Journal of Bioscience and Bioengineering

      Volume: 129 Issue: 1 Pages: 121-128

    • DOI

      10.1016/j.jbiosc.2019.06.012

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] IgG生産細胞株構築における異数性CHO細胞の人為的誘導の効果2020

    • Author(s)
      畑展史,中西悠人,田中航,古賀雄一,山野-足立範子,大政健史
    • Organizer
      化学工学会第85年会(紙面開催)
    • Related Report
      2020 Annual Research Report
  • [Presentation] ゲノム安定化を目指したCHO細胞におけるp21/p53遺伝子の機能解析2020

    • Author(s)
      五百井風香,Christopher Quach,山野-足立範子,古賀雄一,大政健史
    • Organizer
      化学工学会第85年会(紙面開催)
    • Related Report
      2020 Annual Research Report
  • [Presentation] IgG生産細胞株構築における異数性CHO細胞の人為的誘導の効果2020

    • Author(s)
      畑展史,中西悠人,田中航,古賀雄一,山野-足立範子,大政健史
    • Organizer
      化学工学会第51回秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] ゲノム安定化を目指したCHO細胞におけるp21/p53遺伝子の機能解析2020

    • Author(s)
      五百井風香,Christopher Quach,山野-足立範子,古賀雄一,大政健史
    • Organizer
      化学工学会第51回秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Establishment of IgG1 producing Chinese hamster ovary cells with the same vector integration site and number and with different chromosome number distribution between the sub-clones2020

    • Author(s)
      Hirofumi Hata, Yuto Nakanishi, Wataru Tanaka, Yuichi Koga, Noriko Yamano-Adachi, Takeshi Omasa
    • Organizer
      The 33rd Annual and International Meeting of the Japanese Association for Animal Cell Technology (JAACT2020 Fuchu)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The effect of telomere sequences on chromosomal translocations2019

    • Author(s)
      Jun Ho Lee, Wataru Tanaka, Noriko Yamano, and Takeshi Omasa
    • Organizer
      The 26th ESACT Meeting 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Analysis of antibody productivity among Chinese hamster ovary cells constructed by Crispr/Cas9-mediated sitespecific integration2019

    • Author(s)
      Yuto Nakanishi, Wataru Tanaka, Noriko Yamano-Adachi, Hirofumi Hata, Yuichi Koga and Takeshi Omasa
    • Organizer
      Asian Congress on Biotechnology 2019 (ACB2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Characterization of CHO cells with disparate chromosome numbers and induction of artificial aneuploidy cells2018

    • Author(s)
      Noriko Yamano, Norichika Ogata, Yuan Shan Lai, Sho Tanaka, Wataru Tanaka, Yuichi Koga, Takeshi Omasa
    • Organizer
      The 31th Annual and International Meeting of the Japanese Association for Animal Cell Technology (JAACT2018 Tsukuba)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Analysis of chromosomal diversity in CHO cell lines for establishment of stable highly-productive cell line in recombinant therapeutics production2018

    • Author(s)
      Kazuma Kita, Noriko Yamano, Yuichi Koga, and Takeshi Omasa
    • Organizer
      The 24th Symposium of Young Asian Biological Engineers' Community (YABEC2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Analysis of the interstitial telomeric sequences (ITSs) and chromosomal translocations in Cricetulus griseus-derived cells using FISH2018

    • Author(s)
      Jun Ho Lee, Wataru Tanaka, Noriko Yamano, and Takeshi Omasa
    • Organizer
      The 24th Symposium of Young Asian Biological Engineers' Community (YABEC2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research

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Published: 2018-08-27   Modified: 2024-03-26  

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