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Regulation of abortive lytic infection by EBV tegument proteins

Research Project

Project/Area Number 19K07580
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 49060:Virology-related
Research InstitutionFujita Health University

Principal Investigator

Takayuki Murata  藤田医科大学, 医学部, 教授 (30470165)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
KeywordsEBV / abortive lytic / tegument / primary B cell / EBNA2 / LMP1 / PD-L1 / reactivation / B細胞 / 感染直後 / プライマリーB細胞 / 潜伏感染 / 溶解感染 / テグメメント
Outline of Research at the Start

Epstein-Barr virus(EBV)は、潜伏感染と溶解感染という2つの潜伏様式をとる。近年、いくつかの証拠から、両様式の中間的平衡状態にあたる不完全溶解感染の重要性が提起されてきているが、その全容は理解されていない。そこで本研究ではこの不完全溶解感染に着目し、発現する遺伝子やエピジェネティッックスについて経時的に観察する。特にウイルスのテグメントと呼ばれる一群のタンパク質の関与が示唆されており、これについて解析を行う。

Outline of Final Research Achievements

Recently, "abortive lytic" state of Epstein-Barr virus (EBV) has been focused by researchers, but its contribution to the infection and immortalization remains elusive. We here focused on the contribution of viral tegument proteins to the abortive lytic infection. Overall, we made a smooth progress and published some papers. Especially, RNAseq analyses of primary B cells infected with EBV provided many important data, although contribution of tegument proteins to abortive lytic cycle transcriptome appeared not as potent as we first expected when we started this project. For example, we found that EBV evades host immune reaction by over-expressing PD-L1 gene (Yanagi et al., Virology 2021). This induction of PD-L1 was predominantly achieved by viral latent protein EBNA2, but not viral tegument proteins. PD-L1 was increased by viral lytic cycle, but this was also brought about by EBNA2 but not tegument proteins (Yanagi et al. Virology 2022).

Academic Significance and Societal Importance of the Research Achievements

効率のよい感染の成立やがん化に重要であると考えられるが、その分子機構の大部分が未解明であったEpstein-Barr virus(EBV)の不完全溶解感染(abortive lytic)という状態について、新しい知見を得ることができた。このことはウイルス学、ひいては科学における学術的進展である。
また、EBVは感染直後主にEBNA2を介してPD-L1の発言を増強し、宿主免疫から逃避していることが明らかになった。すなわち、EBNA2を標的とした抗がん剤創薬が可能であること、さらにPD-1/PD-L1免疫チェックポイント阻害剤がEBVによるB細胞がん化を抑制できる可能性を示唆した。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (13 results)

All 2022 2021 2019 Other

All Int'l Joint Research (3 results) Journal Article (8 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 8 results,  Open Access: 5 results) Presentation (2 results) (of which Int'l Joint Research: 1 results)

  • [Int'l Joint Research] University of Chittagong(バングラデシュ)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Harvard Medical School(米国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] University of Chittagong(バングラデシュ)

    • Related Report
      2019 Research-status Report
  • [Journal Article] PD-L1 upregulation by lytic induction of Epstein-Barr Virus2022

    • Author(s)
      Yanagi Y, Hara Y, Mabuchi S, Watanabe T, Sato Y, Kimura H, Murata T
    • Journal Title

      Virology

      Volume: 568 Pages: 31-40

    • DOI

      10.1016/j.virol.2022.01.006

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] RNAseq analysis identifies involvement of EBNA2 in PD-L1 induction during Epstein-Barr virus infection of primary B cells2021

    • Author(s)
      Yanagi Yusuke、Okuno Yusuke、Narita Yohei、Masud H.M. Abdullah Al、Watanabe Takahiro、Sato Yoshitaka、Kanda Teru、Kimura Hiroshi、Murata Takayuki
    • Journal Title

      Virology

      Volume: 557 Pages: 44-54

    • DOI

      10.1016/j.virol.2021.02.004

    • Related Report
      2021 Annual Research Report 2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Human Herpesvirus and the Immune Checkpoint PD-1/PD-L1 Pathway: Disorders and Strategies for Survival2021

    • Author(s)
      Murata T
    • Journal Title

      Microorganisms

      Volume: 9 Issue: 4 Pages: 778-778

    • DOI

      10.3390/microorganisms9040778

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Molecular Basis of Epstein-Barr Virus Latency Establishment and Lytic Reactivation2021

    • Author(s)
      Murata T, Sugimoto A, Inagaki T, Yanagi Y, Watanabe T, Sato Y, Kimura H
    • Journal Title

      Viruses

      Volume: 13 Issue: 12 Pages: 2344-2344

    • DOI

      10.3390/v13122344

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Role of Epstein-Barr Virus C Promoter Deletion in Diffuse Large B Cell Lymphoma2021

    • Author(s)
      Mabuchi Seiyo、Hijioka Fumiya、Watanabe Takahiro、Yanagi Yusuke、Okuno Yusuke、Masud H. M. Abdullah Al、Sato Yoshitaka、Murata Takayuki、Kimura Hiroshi
    • Journal Title

      Cancers

      Volume: 13 Issue: 3 Pages: 561-561

    • DOI

      10.3390/cancers13030561

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Oncogenesis of CAEBV revealed: Intragenic deletions in the viral genome and leaky expression of lytic genes2019

    • Author(s)
      Murata Takayuki、Okuno Yusuke、Sato Yoshitaka、Watanabe Takahiro、Kimura Hiroshi
    • Journal Title

      Reviews in Medical Virology

      Volume: 30 Issue: 2

    • DOI

      10.1002/rmv.2095

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Epstein-Barr Virus BBRF2 Is Required for Maximum Infectivity2019

    • Author(s)
      Masud H. M. Abdullah Al、Yanagi Yusuke、Watanabe Takahiro、Sato Yoshitaka、Kimura Hiroshi、Murata Takayuki
    • Journal Title

      Microorganisms

      Volume: 7 Issue: 12 Pages: 705-705

    • DOI

      10.3390/microorganisms7120705

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Epstein-Barr virus genome packaging factors accumulate in BMRF1-cores within viral replication compartments2019

    • Author(s)
      Sugimoto Atsuko、Yamashita Yoriko、Kanda Teru、Murata Takayuki、Tsurumi Tatsuya
    • Journal Title

      PLOS ONE

      Volume: 14 Issue: 9 Pages: 222519-222519

    • DOI

      10.1371/journal.pone.0222519

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] RNAseq analysis identifies involvement of EBNA2 in PD-L1 induction during Epstein-Barr virus infection of primary B cells2021

    • Author(s)
      Takayuki Murata
    • Organizer
      19th International Symposium on Epstein-Barr Virus and Associated Diseases
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] EBウイルステグメントタンパク室BSRF1は子孫ウイルス産生に寄与する2019

    • Author(s)
      柳雄介、村田貴之、HMAA Masud、渡辺崇広、佐藤好隆、五島典、木村宏
    • Organizer
      第33回ヘルペスウイルス研究会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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