• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Influences of the HTLV-1 viral activities in the determination of the infected cell-fate via hijacking the micro-environment of infected cells

Research Project

Project/Area Number 19K07573
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 49060:Virology-related
Research InstitutionThe University of Tokyo

Principal Investigator

Kazumi Nakano  東京大学, 大学院新領域創成科学研究科, 准教授 (60549591)

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: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
KeywordsHTLV-1 / Rex / Tax / Hbz / 潜伏感染細胞 / ウイルス発がん / 感染細胞微小環境 / T細胞 / HBZ / ウイルスタンパク質の相互作用 / primary PBMC感染実験 / ATL / ウイルスタンパク質 / 細胞外微小環境 / 感染T細胞 / 微小環境 / 腫瘍化
Outline of Research at the Start

HTLV-1は感染T細胞を不死化し、約50~60年後に極めて悪性度の高い末梢血T細胞腫瘍ATLを引き起こす。HTLV-1流行地域である我が国では、HTLV-1の病原性発現機構の解明が課題であるが、長く複雑な感染T細胞の腫瘍化プロセスは実験的再現が難しく、未だATL発症におけるHTLV-1の「役割」はほとんど明らかになっていない。これまでの研究から申請者は、HTLV-1のウイルス活動が、感染細胞の腫瘍化への引き金になると予想した。よって本研究では「HTLV-1が感染細胞内外の微小環境にどのような「傷」を残し、感染細胞の運命に影響するか?」という、HTLV-1ウイルスの本質に関わる「問い」に迫る。

Outline of Final Research Achievements

HTLV-1 is an oncovirus that infects human T cells and causes ATL after several decades. However, only about 5% of carriers develop ATL, and many infected cells remain disease-free latently infected cells for several decades. We aimed to elucidate the mechanism of the establishment of such infected cells. In particular, we focused on the role of Rex, which is one of the most unknown viral proteins. We found that Rex affects gene expression regulation, immune responses, and signaling pathways through interactions with various proteins in addition to its function in viral mRNA transport, and that HTLV-1-infected cells are formed through the interaction of Rex, Tax, Hbz, and other viral proteins.

Academic Significance and Societal Importance of the Research Achievements

ATLは感染細胞の腫瘍化により発症する。しかしほとんどのキャリア体内でHTLV-1感染細胞はdisease-freeな潜伏感染状態を維持する。よってATLは本来のウイルスのプログラムを逸脱した状態と言える。本研究ではHTLV-1感染実験系やRex、Tax、Hbzの単独または共発現系を駆使し、現実的なHTLV-1感染の場での解析を目指した。その結果1ウイルスタンパク質群の働きによる感染細胞の構築メカニズムの一端が明らかにした。このようにHTLV-1の本来のdisease-freeな潜伏感染細胞構築メカニズムを解明することにより、感染細胞の腫瘍化(ATL発症)メカニズムの理解が深まると期待される。

Report

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

    (10 results)

All 2022 2021 2020 2019

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (6 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Exploring New Functional Aspects of HTLV-1 RNA-Binding Protein Rex: How Does Rex Control Viral Replication?2022

    • Author(s)
      Kazumi Nakano(corresponding author), Koichi Yokoyama, Shuichi Shin, Koki Uchida, Kazuki Tsuji, Marie Tanaka, Kaoru Uchimaru, and Toshiki Watanabe
    • Journal Title

      Viruses

      Volume: 14 Issue: 2 Pages: 407-407

    • DOI

      10.3390/v14020407

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Elucidation of the mechanism of host NMD suppression by HTLV-1 Rex: Dissection of Rex to identify the NMD inhibitory domain2022

    • Author(s)
      Nakano, K., Karasawa N., Hashizume M., Tanaka, Y, Ohsugi, T., Uchimaru. K. and Watanabe, T.
    • Journal Title

      Viruses

      Volume: 14 Issue: 2 Pages: 344-344

    • DOI

      10.3390/v14020344

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Overexpression of aberrant Wnt5a and its effect on acquisition of malignant phenotypes in adult T-cell leukemia/lymphoma (ATL) cells.2021

    • Author(s)
      Nakano K., Chihara Y., Kobayashi S., Iwanaga M., Utsunomiya A., Watanabe T., and Uchimaru K.
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 4114-4114

    • DOI

      10.1038/s41598-021-83613-2

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] HTLV-1機能タンパク質群のインテラクティブな働きとHTLV-1感染の成立2021

    • Author(s)
      中野 和民、田中 稀瑛、内田 弘毅、渡邉 俊樹、内丸 薫
    • Organizer
      第7回日本HTLV-1学会学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] HTLV-1感染の場におけるウイルスタンパク質の相互制御機構と相乗的機能の解析2021

    • Author(s)
      中野 和民、田中 稀瑛、内田 弘毅、渡邉 俊樹、内丸 薫
    • Organizer
      第68回日本ウイルス学会学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Exploring the biological impact of HTLV-1 Rex on dysregulation of the host T-cell splicing machinery2020

    • Author(s)
      Marie Tanaka, Koki Uchida, Toshiki Watanabe, Kaoru Uchimaru, and Kazumi Nakano
    • Organizer
      第79回日本癌学会学術総会
    • Related Report
      2020 Research-status Report
  • [Presentation] Examination of effects and the mode-of-action of a new drug candidate, Darinaparsin, on adult T-cell leukemia/lymphoma (ATL) cells2020

    • Author(s)
      Tomohiro Nasu, Aki Tanabe, Toshiki Watanabe, Kaoru Uchimaru, and Kazumi Nakano
    • Organizer
      第79回日本癌学会学術総会
    • Related Report
      2020 Research-status Report
  • [Presentation] HTLV-1感染および腫瘍化と関連するエクソソーム表面抗原マーカー同定の試み2019

    • Author(s)
      中野 和民、宇都宮 與、渡邉 俊樹、内丸 薫
    • Organizer
      第6回 日本HTLV-1学会
    • Related Report
      2019 Research-status Report
  • [Presentation] HTLV-1 Rexの宿主スプライシング機構制御における新規機能の探索2019

    • Author(s)
      内田 弘毅、渡邉 俊樹、内丸 薫、中野 和民
    • Organizer
      第6回 日本HTLV-1学会
    • Related Report
      2019 Research-status Report
  • [Patent(Industrial Property Rights)] 抗CADM1抗体2021

    • Inventor(s)
      中野和民、高橋良明、田部亜季、渡邉俊樹、津本浩平
    • Industrial Property Rights Holder
      中野和民、高橋良明、田部亜季、渡邉俊樹、津本浩平
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2021-080133
    • Filing Date
      2021
    • Acquisition Date
      2021
    • Related Report
      2021 Annual Research Report

URL: 

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

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi