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Development of new combined chemotherapy with mutant p53 function recovery drug for esophageal cancer

Research Project

Project/Area Number 19K18118
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 55020:Digestive surgery-related
Research InstitutionOsaka University

Principal Investigator

Kobayashi Teruyuki  大阪大学, 医学系研究科, 招へい教員 (70779751)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2019: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords食道扁平上皮癌 / PRIMA-1MET / 5-FU / p53 / p73 / NOXA / APR-246 / Noxa / 食道癌
Outline of Research at the Start

本研究では, 高率にp53遺伝子変異を有する食道扁平上皮癌に対して, 変異p53機能を回復させることで化学療法に対する抵抗性を改善できるか, また併用効果に優れる抗癌剤の同定など作用メカニズムを含めて検証し, 最終的に臨床応用につなげることを目的とする。作用機序に関しては, p53シグナル以外にも, 変異p53が機能回復することでp53とinteractのあるmicroRNAがどう変化するかを網羅的microRNAアレイ解析により行う。さらに臨床サンプルを用いたPDX(Patient derived xenograft)モデルやオルガノイドを用いて検証することを目指す。

Outline of Final Research Achievements

The TP53 gene mutation rate in esophageal squamous epithelial cancer has been reported to be 90% or more, and is involved in chemotherapy resistance. In the p53 missense mutant strain, PRIMA-1MET showed an antitumor effect more than the additive effect when combined with any anticancer agent, and particularly showed a synergistic effect when used in combination with 5-FU. Apoptosis was strongly induced by this combination therapy, and the expression of p53, p73, and NOXA was enhanced. Even in subcutaneous tumor model mice using p53 missense mutant strain (TE8) and PDX model mice using human-derived cells, the antitumor effect was clearly stronger in the 5-FU + PRIMA-1MET combination group than in each single agent administration. Increased expression of p73 / NOXA was observed in the tumor tissue after treatment.

Academic Significance and Societal Importance of the Research Achievements

食道扁平上皮癌におけるTP53遺伝子変異率は9割以上といわれ、化学(放射線)療法の耐性や予後に関与する。PRIMA-1METは、2002年に小分子化合物スクリーニングで同定されとくにp53ミスセンス変異の転写能を回復するとされるが、食道扁平上皮癌する治療効果、メカニズムの一端、化学療法との併用効果が明らかとなった。今後、食道扁平上皮癌に対して、個別医療・オーダーメード医療を改良するにあたって、治療選択肢の一助を担う有意義な成果であると考えられる。

Report

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

    (1 results)

All 2019

All Presentation (1 results)

  • [Presentation] Combined effect and mechanism of the mutant p53 function restoration drug PRIMA-1MET with chemotherapy for esophageal squamous cell carcinoma2019

    • Author(s)
      小林 照之
    • Organizer
      第119回日本外科学会学術集会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2022-01-27  

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