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Expression of DNA damage repair factors and APOBEC3 in HPV-associated oropharyngeal carcinoma

Research Project

Project/Area Number 20K18299
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 56050:Otorhinolaryngology-related
Research InstitutionKeio University (2021-2023)
独立行政法人国立病院機構(東京医療センター臨床研究センター) (2020)

Principal Investigator

Kono Takeyuki  慶應義塾大学, 医学部(信濃町), 講師 (90573410)

Project Period (FY) 2020-04-01 – 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 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
KeywordsHPV / 頭頸部癌 / DNA損傷修復 / APOBEC / 新規治療 / DNA損傷修復系 / 阻害実験 / 中咽頭癌 / 化学療法 / 予後予測因子 / shRNA
Outline of Research at the Start

近年急増しているHPV関連中咽頭癌において、新たな治療の標的となる因子の探索や治療効果の予後予測因子の検討は重要な課題で、その為にHPVの生活環や腫瘍化に至る機序の解明が必須だが、頭頸部領域では十分に検証されていない。一方、子宮頸部上皮ではDNA損傷修復系がHPVゲノムの維持・複製・増殖に必須で、内因性免疫因子であるAPOBEC3が癌化を引き起こす可能性が示唆されている。これら背景から、本研究ではHPV関連中咽頭癌におけるDNA損傷修復系因子とAPOBEC3の発現について、化学放射線治療不応例と奏功例を対比しながら検討し、予後予測因子となりうるか、また新たな治療薬の標的となるか検討する。

Outline of Final Research Achievements

HPV-positive oropharyngeal cancer showed significantly higher expression of factors of the ATR and FA pathways and their downstream homologous repair factors than HPV-negative oropharyngeal cancer, and DNA damage was also increased. The expression of APOBEC3B was also increased, and both were co-localized in the nucleus; inhibition of APOBEC factors decreased DNA damage repair factors, and inhibition of DNA damage repair factors decreased APOBEC expression. Conversely, the induction of DNA damage increased the expression of APOBEC factors. In HPV-positive head and neck carcinoma cells, the dose-dependent enhancement of the anti-tumor effect by ATR inhibitor treatment was observed, suggesting the possibility of novel therapy.

Academic Significance and Societal Importance of the Research Achievements

本研究はHPV関連頭頸部癌におけるDNA損傷修復系因子とAPOBEC因子の発現について、そのトリガーとなりうる因子の解析を行い、新規治療標的の候補となりうる可能性を示した。
DNA損傷修復経路の阻害剤併用により、既存のシスプラチンの抗腫瘍効果の上乗せが期待され、将来的には殺細胞性の抗がん剤の容量を軽減することで副作用のリスクを減らし安全な治療を実現するなどの効果も期待できるという点で、学術的、社会的に重要な意義のある成果と考えられる。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (6 results)

All 2023 2022 2021 2020

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

  • [Journal Article] Genomic Instability and DNA Damage Repair Pathways Induced by Humn Papillomaviruses.2021

    • Author(s)
      Kono T, Laimins LA
    • Journal Title

      Viruses

      Volume: 13 Issue: 9 Pages: 1821-1832

    • DOI

      10.3390/v13091821

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Topoisomerase 2β induces DNA breaks to regulate human papillomavirus replication2021

    • Author(s)
      Kaminski P, Hong S, Kono T, Hoover P, Laimins L
    • Journal Title

      mbio

      Volume: 12 Issue: 1 Pages: 5-21

    • DOI

      10.1128/mbio.00005-21

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Activation of DNA damage repair factors in HPV positive oropharyngeal cancers2020

    • Author(s)
      Kono T, Hoover P, Poropatich K, Paunesku T, Mittal BB, Samant S, Laimins LA
    • Journal Title

      Virology

      Volume: 547 Pages: 27-34

    • DOI

      10.1016/j.virol.2020.05.003

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] FANCD2 may serve as prognostic biomarker in HPV related oropharyngeal cancers2023

    • Author(s)
      Takeyuki Kono, Hiroyuki Ozawa
    • Organizer
      AHNS 11th International Conference on Head and Neck Cancer
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] FANCD2 may serve as prognostic biomarker in HPV related oropharyngeal cancers2022

    • Author(s)
      甲能武幸、小沢宏之
    • Organizer
      日本外科系連合
    • Related Report
      2022 Research-status Report
  • [Presentation] HPV関連中咽頭癌におけるDNA損傷修復系因子の活性化と予後に関する検討2021

    • Author(s)
      甲能武幸
    • Organizer
      第31回日本頭頸部外科学会総会
    • Related Report
      2021 Research-status Report

URL: 

Published: 2020-04-28   Modified: 2025-01-30  

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