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Role of Aurora kinase in RNA metabolism

Research Project

Project/Area Number 17K08762
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Experimental pathology
Research InstitutionOkayama University

Principal Investigator

Katayama Hiroshi  岡山大学, 医歯薬学総合研究科, 准教授 (90713975)

Co-Investigator(Kenkyū-buntansha) 伊藤 佐智夫  岡山大学, 医歯薬学総合研究科, 助教 (30335624)
笹井 香織  岡山大学, 医歯薬学総合研究科, 助教 (50722162)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywordsオーロラキナーゼ / RNA / プロモーター / リン酸化 / RNA結合タンパク質 / オーロラA / hnRNP / オーロラB / mRNAメタボリズム / 細胞周期 / がん抑制タンパク質 / 膠芽腫 / オーロラAキナーゼ
Outline of Final Research Achievements

Here, we report for the first time the essential role of Aurora-A-hnRNP interaction in Aurora-B transcriptional regulation. The results can be summarized as follows: (1) hnRNP controlled Aurora-B mRNA decay by direct binding and transactivated Aurora-B promoter by indirectly affecting CHR region in the promoter. (2) Aurora-A phosphorylated hnRNP on at least two serine residues in vivo. (3) Aurora-A phosphorylation of hnRNP upregulated hnRNP’ transactivation activity to Aurora-B promoter. (4) Both hnRNP loss or overexpression overrode Taxol induced spindle checkpoint arrest and resulted in the production of polyploidy cells, resembling to the phenotypes observed by gain or loss of function of Aurora-B. (5) Both hnRNP loss or overexpression enhances cell motility. These results indicate that Aurora-A/hnRNP play an important role in chromosome stability by regulating Aurora-B RNA metabolism and the deregulation of this complex would promote tumorigenesis and metastasis.

Academic Significance and Societal Importance of the Research Achievements

オーロラAの機能破綻によって誘導される染色体不安定性のメカニズムとして中心体の過剰生産が広く知られていたが、本研究からオーロラAが染色体分配機構のメインプレイヤーであるオーロラBの発現量を直接調節していることが明らかになり、オーロラAが多様なシグナル経路を調節することで染色体安定性を保証していることが示された。この知見は、臨床試験されているオーロラAとBの両阻害剤の組み合わせが癌細胞特有の染色体不安定性の脆弱さを効率よく標的化できることを予見するものであり、臨床試験で今後検討されることが期待される。

Report

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

    (9 results)

All 2018 2017 Other

All Int'l Joint Research (2 results) Presentation (7 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results)

  • [Int'l Joint Research] MDアンダーソンがんセンター(米国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Univ of Texas MD Anderson Cancer Center(米国)

    • Related Report
      2017 Research-status Report
  • [Presentation] 細胞分裂期制御タンパク質による新規転写調節機構の解明2018

    • Author(s)
      笹井香織、Warapen Treekitkarnmongkol、伊藤佐智夫、Sanker N. Maity、Subrata Sen、片山博志
    • Organizer
      第41回日本分子生物学会年会
    • Related Report
      2018 Research-status Report
  • [Presentation] 肺癌における癌遺伝子候補MYNNとp53の統合的解析2018

    • Author(s)
      伊藤 佐智夫、邱 艶艶、堺 明子、殷 佩浩、片山 博志
    • Organizer
      第41回日本分子生物学会年会
    • Related Report
      2018 Research-status Report
  • [Presentation] eEF1A2 facilitates PTEN-GSK3β mediated Aurora-A protein degradation during S-G2 phase inactivated in PTEN-deficient breast cancer2018

    • Author(s)
      W Treekitkarnmongkol, LM Solis, K Kai, AM Thompson, W Tian, II Wistuba, K Sasai, Y Jltsumori, AA Sahin, DH Hawke, JM Lee, L Qin, T Bawa-Khalfe, R Rad, KK Wong, CM Abbott, H Katayama and S Sen
    • Organizer
      2018 San Antonio Breast Cancer Symposium
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Aurora-A Signaling Cascade Regulating Transactivation of Mitotic Genes2018

    • Author(s)
      H Katayama, K Sasai, S Sen
    • Organizer
      7th Asian Forum of Chromosome and Chromatin Biology
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Functional Interaction between Aurora-A Kinase and Mps1 Kinase in the Regulation of Cell Cycle and Genomic Instability2018

    • Author(s)
      H Katayama
    • Organizer
      2018 Academic Conference on Chinese Medical Oncology
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] RNA結合タンパク質hnRNP Fは細胞分裂進行を調節している2017

    • Author(s)
      高岡修平, 坂本萌, 實盛好美, 笹井香織, 片山博志
    • Organizer
      第40回日本分子生物学会年会
    • Related Report
      2017 Research-status Report
  • [Presentation] Emerging role of hnRNP F in mitotic cell cycle progression2017

    • Author(s)
      坂本萌, 高岡修平, 實盛好美, 笹井香織, Subrata Sen, 片山博志
    • Organizer
      西日本医学生学術フォーラム2017
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2022-02-21  

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