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Search for transcription factors involved in latent and persistent human papillomavirus infection.

Research Project

Project/Area Number 21K07047
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 49060:Virology-related
Research InstitutionNational Institute of Infectious Diseases

Principal Investigator

Ishii Yoshiyuki  国立感染症研究所, 病原体ゲノム解析研究センター, 主任研究官 (90342899)

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)
KeywordsHPV / 持続感染 / HOXC13 / ゲノム維持 / 複製 / LCR / 転写因子 / 潜伏持続感染
Outline of Research at the Start

NIKS細胞の網羅的遺伝子発現解析と転写因子データベースからHPV16型および18型のゲノム維持に重要と予想される転写因子をピックアップする。これら転写因子のLCR結合性とDNA結合配列、長期的なHPVゲノム維持および複製に与える影響、HPV16型と18型を除く遺伝子型HPVに及ぼす影響を調べる。

Outline of Final Research Achievements

The viral genome of the high-risk human papillomavirus (HPV), the causative agent of cervical cancer, is stably maintained as extrachromosomal episomes that establish persistent infection. We previously identified transcription factor HOXC13 as an important host protein mediating the short-term retention of the HPV16 and HPV18 genomes in normal human immortalized keratinocytes (NIKS). Here, we used CRISPR-Cas9 technology to construct HOXC13 knockout (KO) NIKS cells to determine whether HOXC13 is required for the long-term maintenance of high-risk HPV genomes. HPV16, HPV18, HPV52, and HPV58 whole genomes were transfected into HOXC13 KO cells, and the copy number of viral genomes per cell was monitored over cell passages. Copy numbers of HPV16, HPV52, and HPV58 genomes decreased continuously in HOXC13 KO cells, whereas HPV18 genomes remained stable throughout passages. Thus, HOXC13 is critical for the stable maintenance of the viral genomes of HPV16, HPV52, and HPV58, but not HPV18.

Academic Significance and Societal Importance of the Research Achievements

本研究の成果である長期培養におけるHPV16、HPV52、HPV58のウイルスゲノムの維持にHOXC13が寄与する事実は、我々が以前提唱したHPVはHOXC13を発現する上皮幹細胞を標的とし、HOXC13依存的な初期プロモーターの活性化とウイルスゲノムの維持により持続感染を確立するとした仮説を支持している。HPV18は、HPV16、HPV52、HPV58と異なり、腺細胞指向性のようなユニークな特徴を持っている。今回のHOXC13に依存しないHPV18ゲノムの維持は、細胞指向性などHPV18の独自性を理解する上で重要な役割を果たすと考えられる。

Report

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

    (2 results)

All 2023

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (1 results)

  • [Journal Article] Folliculin Prevents Lysosomal Degradation of Human Papillomavirus To Support Infectious Cell Entry.2023

    • Author(s)
      Ishii Y, Yamaji T, Sekizuka T, Homma Y, Mori S, Takeuchi T, Kukimoto I.
    • Journal Title

      Journal of Virology

      Volume: 97(5) Issue: 5

    • DOI

      10.1128/jvi.00056-23

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Presentation] FLCNはリソソームによるHPVの分解を抑制し、細胞への侵入をサポートする2023

    • Author(s)
      石井 克幸
    • Organizer
      第70回日本ウイルス学会学術集会
    • Related Report
      2023 Annual Research Report

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

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