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Identification and induction of cytotoxic T cells for HIV-1 cure treatment

Research Project

Project/Area Number 20H03726
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 54030:Infectious disease medicine-related
Research InstitutionKumamoto University

Principal Investigator

Takiguchi Masafumi  熊本大学, ヒトレトロウイルス学共同研究センター, シニア教授 (00183450)

Co-Investigator(Kenkyū-buntansha) 近田 貴敬  熊本大学, ヒトレトロウイルス学共同研究センター, 特任講師 (60749711)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2022: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2021: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2020: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
KeywordsHIV-1 / 細胞傷害性T細胞 / 完治療法 / 逃避変異
Outline of Research at the Start

HIV-1は高変異性ウイルスでヒトゲノム内に潜伏するために、完治治療が極めて難しい。完治治療を達成するには、cART治療中に潜伏感染ウイルスを活性化させ、活性化させたHIV-1潜伏感染細胞を認識する免疫を誘導させる必要がある。本研究では、これらの問題を解決するために、有効な免疫能の同定とその誘導に焦点を絞った以下のような研究を行う。
1.逃避変異を持ったHIV-1の増殖を強く抑制できる高感度なT細胞を同定。 2.cART治療患者で、HIV-1不変領域を認識するか逃避変異を認識できる強いHIV-1増殖抑制能を持ったT細胞を誘導する方法の開発。これにより完治治療に繋げる技術の確立を目指す。

Outline of Final Research Achievements

To achieve the treatment that eliminates HIV-1 in patients undergoing cART, it is necessary to establish a method that induce T cells which recognize HIV-1 latent cells. In the present study, we studied identification of CD8+ T cells which recognize mutations escaped from HIV-1-specific T cells as well as induction of CD8+ T cells having ability to strongly suppress HIV-1 replication from naive T cells. We found that HLA-B*52:01-restricted PolRI8-6Vmutant-specific CD8+ T cells and HLA-B*35:01-restricted NefFF9 mutant-specific CD8+ T cells were elicited in individuals infected with HIV-1 mutant viruses and that these T cells effectively recognized cells infected with the mutant virus. We also established a method using a STING ligand for priming of functional HIV-1-specifc CD8+ T cells from naive T cells. We effectively induced functional CD8+ T cells specific for three protective epitopes.

Academic Significance and Societal Importance of the Research Achievements

慢性のウイルス感染症には、HIV-1以外にも肝炎、HTLV-1、ヘルペス感染症等があり、これらの感染症での原因ウイルスの排除は医学的にも非常に重要である。その中でもHIV-1感染症は、ウイルスの変異が最も激しく、ウイルスが人のゲノムの中に潜伏する最も治療が難しい感染症である。本研究は、潜伏するウイルスがわずかに活性化した時に認知できるT細胞や変異抗原を認知するT細胞を明らかにした研究で、エイズ研究ばかりでなく、他のウイルス感染症の研究にも貢献する研究成果と考えられる。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (11 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (2 results) Journal Article (4 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (3 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results) Remarks (2 results)

  • [Int'l Joint Research] University of Oxford(英国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Oxford大学(英国)

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Immunological Control of HIV-1 Disease Progression by Rare Protective HLA Allele2022

    • Author(s)
      Zhang Yu、Chikata Takayuki、Kuse Nozomi、Murakoshi Hayato、Gatanaga Hiroyuki、Oka Shinichi、Takiguchi Masafumi
    • Journal Title

      Journal of Virology

      Volume: 96 Issue: 22

    • DOI

      10.1128/jvi.01248-22

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] STING Ligand-Mediated Priming of Functional CD8+ T Cells Specific for HIV-1-Protective Epitopes from Naive T Cells2021

    • Author(s)
      Kuse Nozomi、Akahoshi Tomohiro、Takiguchi Masafumi
    • Journal Title

      Journal of Virology

      Volume: 95 Issue: 16

    • DOI

      10.1128/jvi.00699-21

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Collaboration of a Detrimental HLA-B*35:01 Allele with HLA-A*24:02 in Coevolution of HIV-1 with T Cells Leading to Poorer Clinical Outcomes2021

    • Author(s)
      Kuse Nozomi、Murakoshi Hayato、Akahoshi Tomohiro、Chikata Takayuki、James Katherine L.、Gatanaga Hiroyuki、Rowland-Jones Sarah L.、Oka Shinichi、Takiguchi Masafumi
    • Journal Title

      Journal of Virology

      Volume: 95 Issue: 23

    • DOI

      10.1128/jvi.01259-21

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Role of Escape Mutant-Specific T Cells in Suppression of HIV-1 Replication and Coevolution with HIV-12020

    • Author(s)
      Zhang Yu、Kuse Nozomi、Akahoshi Tomohiro、Chikata Takayuki、Gatanaga Hiroyuki、Oka Shinichi、Murakoshi Hayato、Takiguchi Masafumi
    • Journal Title

      Journal of Virology

      Volume: 94 Issue: 19

    • DOI

      10.1128/jvi.01151-20

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Effective priming of functional CD8+ T cells specific for HIV protective epitopes from naive T cells2023

    • Author(s)
      Kuse Nozomi
    • Organizer
      Oxford-Kumamoto Universities Joint Annual Symposium 2023
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Immunological Control of HIV-1 Disease Progression by Rare Protective HLA Allele2023

    • Author(s)
      Zhang Yu、Chikata Takayuki、Kuse Nozomi、Murakoshi Hayato、Gatanaga Hiroyuki、Oka Shinichi、Takiguchi Masafumi
    • Organizer
      Oxford-Kumamoto Universities Joint Annual Symposium 2023
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Functional CD8+ T cells specific for HIV-1 protective epitopes primed with STING Ligand2021

    • Author(s)
      Nozomi Kuse、Tomohiro Akahoshi、Masafumi Takiguchi
    • Organizer
      第35回日本エイズ学会学術集会・総会 日仏シンポジウム
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Remarks] 熊本大学 ヒトレトロウイルス学共同研究センター 国際先端研究部門 国際連携分野(滝口研究室)

    • URL

      https://kumamoto-u-jrchri.jp/takiguchi/default.html

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
  • [Remarks] 熊本大学 ヒトレトロウイルス学共同研究センター 国際先端研究部門 国際連携分野(滝口研究室)

    • URL

      http://kumamoto-u-jrchri.jp/takiguchi/default.html

    • Related Report
      2020 Annual Research Report

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Published: 2020-04-28   Modified: 2024-01-30  

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