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Analysis of epigenetic aberrations induced by oncovirus infection

Research Project

Project/Area Number 19K16101
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 43050:Genome biology-related
Research InstitutionChiba University

Principal Investigator

Okabe Atsushi  千葉大学, 大学院医学研究院, 助教 (80778118)

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)
KeywordsChromatin structure / EBV / Epigenome / Histone modification / Gastric cancer / クロマチン構造 / 胃癌 / エピゲノム / 発癌 / Epstein-Barrウイルス
Outline of Research at the Start

癌ウイルスとして知られるEpstein-Barr (EB) ウイルスの感染モデルを用いて発癌ドライバーとしてのエピゲノム異常の誘導機構とその発癌誘導機構を解明する。EBウイルス感染後に発現解析とChIP-seqでのエピゲノム解析を時系列で行い、エピゲノム異常誘導因子を同定し、機能解析を行う。また、Hi-C法によるクロマチン構造解析を行うことで、エピゲノム異常が転写制御に与える影響を明らかにし、領域特異的なエピゲノム編集による検証を行う。最後にEBウイルス陽性胃癌の臨床検体でエピゲノム異常と誘導因子の発現状態を検証し、治療標的としての可能性を検討する。

Outline of Final Research Achievements

We performed a comprehensive analysis of chromatin structure using Hi-C data in 14 GC and 2 normal gastric epithelial cells. We found a specific repertoire of A/B chromatin compartments in EBV(+) GCs, and discovered that regions displaying these features also exhibit direct chromatin interactions with EBV genome. To elucidate epigenetic alterations at the EBV-host interacting regions, we used in vitro EBV infection system and comprehensively analyzed histone modification and chromatin structural changes. We found that at EBV-host interacting regions the specific disruption of H3K9me3(+) heterochromatin and TADs were observed after EBV infection and heterochromatin disruption led to activation of entire domain as enhancer regions. Besides, activated enhancers even within heterochromatin regions upregulate neighboring proto-oncogenes through aberrant de novo loop formations.

Academic Significance and Societal Importance of the Research Achievements

本研究により、癌ウイルス感染が誘導するクロマチン構造異常とエピゲノム異常を解明し、ゲノム異常を伴うことなくエンハンサーの異常活性化をもたらす新規エピゲノム発癌機構を報告した。この成果は、これまでにない実験手法により、外来DNAであるウイルスゲノムとホストゲノムの直接的な相互作用を検出し、ホストクロマチンに誘導される異常を解明した初めての報告であり、ウイルス研究にも新たな知見をもたらした独創性の高い研究成果である。
EBVは胃癌のみならず、リンパ腫や上咽頭癌など広範な臓器の腫瘍に関与しており、エピゲノムやクロマチン構造異常を標的とした治療応用の基盤データとなる重要な研究である。

Report

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

    (13 results)

All 2021 2020 2019 Other

All Int'l Joint Research (2 results) Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (8 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results) Remarks (1 results)

  • [Int'l Joint Research] Duke-NUS Medical School,/Genome Institute of Singapore,/Cancer Science Institute of Singapore,(シンガポール)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Cancer Science Institute of Singapore(シンガポール)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Cross-species chromatin interactions drive transcriptional rewiring in Epstein-Barr virus-positive gastric adenocarcinoma2020

    • Author(s)
      Okabe Atsushi, Huang Kie Kyon, Matsusaka Keisuke, Fukuyo Masaki, Xing Manjie, Ong Xuewen, Hoshii Takayuki, Usui Genki, Seki Motoaki, Mano Yasunobu, Rahmutulla Bahityar, Kanda Teru, Suzuki Takayoshi, Rha Sun Young, Ushiku Tetsuo, Fukayama Masashi, Tan Patrick, Kaneda Atsushi
    • Journal Title

      Nature Genetics

      Volume: 52 Issue: 9 Pages: 919-930

    • DOI

      10.1038/s41588-020-0665-7

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Epstein‐Barr virus positive gastric cancer involves enhancer activation through ATF32020

    • Author(s)
      Asakawa Yuta、Okabe Atsushi、Fukuyo Masaki、Li Wenzhe、Ikeda Eriko、Mano Yasunobu、Funata Sayaka、Namba Hiroe、Fujii Takahiro、Kita Kazuko、Matsusaka Keisuke、Kaneda Atsushi
    • Journal Title

      Cancer Science

      Volume: 00 Issue: 5 Pages: 1-11

    • DOI

      10.1111/cas.14370

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] ウイルスがもたらすヘテロクロマチン破綻と 新たなエピジェネティック発癌機構「エンハンサー侵襲」の発見2021

    • Author(s)
      岡部篤史、Kie Kyon Huang、松坂恵介、福世真樹、星居孝之、臼井源紀、 関元昭、眞野恭伸、Bahityar Rahmutulla、神田輝、鈴木孝禎、牛久哲男、 深山正久、Patrick Tan、金田篤志
    • Organizer
      第14回日本エピジェネティクス研究会年会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] CHROMATIN REWIRING BY ONCOVIRUS INFECTION THROUGH THE NOVEL MECHANISM ”ENHANCER INFESTATION” IN GASTRIC ADENOCARCINOMA2021

    • Author(s)
      Atsushi Okabe, Kie Kyon Huang, Keisuke Matsusaka, Masaki Fukuyo, Takayuki Hoshii, Bahityar Rahmutulla, Manjie Xing, Xuewen Ong, Patrick Tan, Atsushi Kaneda
    • Organizer
      15th Asian Epigenomics Meeting
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] (イ)Heterochromatin reprogramming and chromatin structural rewiring induced by oncovirus infection in gastric adenocarcinoma2020

    • Author(s)
      (エ)Atsushi Okabe, Kie Kyon Huang, Keisuke Matsusaka, Masaki Fukuyo, Bahityar Rahmutulla, Takayuki Hoshii, Patrick Tan, Atsushi Kaneda
    • Organizer
      第31回日本消化器癌発生学会総会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Chromatin Structural Aberrations due to oncovirus infection activate neighboring oncogenes through enhancer activation2020

    • Author(s)
      Atsushi Okabe, Kie Kyon Huang, Keisuke Matsusaka, Masaki Fukuyo, Bahityar Rahmutulla, Patrick Tan, Atsushi Kaneda
    • Organizer
      第79回日本癌学会学術総会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Heterochromatin disruption and chromatin structural rewiring in gastric adenocarcinoma infected by Epstein-Barr virus2020

    • Author(s)
      Atsushi Okabe, Kie Kyon Huang, Keisuke Matsusaka, Masaki Fukuyo, Bahityar Rahmutulla, Patrick Tan, Atsushi Kaneda
    • Organizer
      Cold Spring Harbor Meeting Epigenetics and Chromatin
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Heterochromatin reprogramming induced by Epstein-Barr virus infection induces oncogenic activation through aberrant enhancer activation2019

    • Author(s)
      Atsushi Okabe, Keisuke Matsusaka, Masaki Fukuyo, Hiroe Namba, Sayaka Funata, Atsushi Kaneda
    • Organizer
      第13回日本エピジェネティクス研究会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] EBV infection induces domain structural changes which lead to oncogenic activation2019

    • Author(s)
      Atsushi Okabe, Keisuke Matsusaka, Masaki Fukuyo, Bahityar Rahmutulla, Patrick Tan, Atsushi Kaneda
    • Organizer
      第78回日本癌学会学術総会
    • Related Report
      2019 Research-status Report
  • [Presentation] 癌ウイルス感染がもたらすヘテロクロマチンリプログラミングによる癌遺伝子の活性化2019

    • Author(s)
      Atsushi Okabe, Kie Kyon Huang, Keisuke Matsusaka, Masaki Fukuyo, Bahityar Rahmutulla, Patrick Tan, Atsushi Kaneda
    • Organizer
      第42回日本分子生物学会年会
    • Related Report
      2019 Research-status Report
  • [Remarks] 千葉大学大学院医学研究院分子腫瘍学医学研究院スタッフページ

    • URL

      https://www.m.chiba-u.ac.jp/class/moloncol/staff_okabe.html

    • Related Report
      2020 Annual Research Report

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

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