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Analysis of cross-reactivity of dominant SIV-specific CD8+T cells associate with viral control in SIV infected Burmese rhesus macaque.

Research Project

Project/Area Number 19K16679
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Nomura Takushi  国立感染症研究所, エイズ研究センター, 主任研究官 (80711001)

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: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
KeywordsSIV / HIV / CTL / 複製制御 / サルエイズモデル / 交差反応性 / 免疫ドミナンシー
Outline of Research at the Start

HIV感染症の自然感染では、宿主の獲得免疫によってその複製の制御には至らず持続感染が成立する。複製制御を可能ならしめる機序の解明はHIV感染症の制圧のために重要である。初期複製制御に最大の役割と果たすとみられるドミナント(主要)CTL反応の詳細な解析は。長期複製制御群では行われていない。本研究では二つの異なる病態進行を示す長期SIV複製制御サル群の凍結サンプルを用いて、経時的なSIV特異的ドミナントCTLの野生型抗原および変異型抗原に対する交差反応性を解析し、複製制御に関わるSIV特異的ドミナントCTL反応の誘導動態を検討する。

Outline of Final Research Achievements

We analyzed cross-reactivity of epitope-specific CD8+ T cells in MHC-I haplotype 90-120-Ia+ rhesus macaques controlled SIV. Long term SIV controllers were divided into two groups. Group N showed sustained viral control without accumulation of CTL escape mutations, and group M showed unstable viral control with accumulation of CTL escape mutations. Almost all animals in Group N showed cross-reactive SIV-specific CD8+ T cells post infection, whereas animals in Group M did not. We suggest that such CTL dominance may be responsible for the maintenance of sustained viral control in the Group N and the accumulation of escape mutations in Group M.

Academic Significance and Societal Importance of the Research Achievements

本研究では世界的に前例のないCTL依存的な長期SIV複製制御個体を用い、複製制御維持に必要なCTL反応の性質と、CTL依存的な複製制御下での低レベルのウイルス複製および変異選択の性質を部分的に解明した。これらは長期SIV複製制御維持にかかわるウイルス特異的CTL反応と体内ウイルス排除への新たな有用な知見であり、基礎研究として将来的なHIV感染症の制圧に寄与する成果である。

Report

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

    (9 results)

All 2020 2019 Other

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

  • [Journal Article] Therapeutic vaccine-mediated Gag-specific CD8+ T-cell induction under anti-retroviral therapy augments anti-virus efficacy of CD8+ cells in simian immunodeficiency virus-infected macaques2020

    • Author(s)
      Nakamura-Hoshi Midori、Takahara Yusuke、Matsuoka Saori、Ishii Hiroshi、Seki Sayuri、Nomura Takushi、Yamamoto Hiroyuki、Sakawaki Hiromi、Miura Tomoyuki、Tokusumi Tsuyoshi、Shu Tsugumine、Matano Tetsuro
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1 Pages: 11394-11394

    • DOI

      10.1038/s41598-020-68267-w

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A Novel Immunogen Selectively Eliciting CD8(+) T Cells but Not CD4(+) T Cells Targeting Immunodeficiency Virus Antigens.2020

    • Author(s)
      Ishii H, Terahara K, Nomura T, Takeda A, Okazaki M, Yamamoto H, Tokusumi T, Shu T, Matano T.
    • Journal Title

      Journal of Virology

      Volume: 94 Issue: 8

    • DOI

      10.1128/jvi.01876-19

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] CD8+ T cell-based strong selective pressure on multiple simian immunodeficiency virus targets in macaques possessing a protective MHC class I haplotype2019

    • Author(s)
      Hau Trang Thi Thu、Nakamura-Hoshi Midori、Kanno Yoshiaki、Nomura Takushi、Nishizawa Masako、Seki Sayuri、Ishii Hiroshi、Kawana-Tachikawa Ai、Hall William W.、Nguyen Thi Lan Anh、Matano Tetsuro、Yamamoto Hiroyuki
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 512 Issue: 2 Pages: 213-217

    • DOI

      10.1016/j.bbrc.2019.03.003

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] サルエイズモデルにおける組織リザーバー解析2020

    • Author(s)
      野村拓志
    • Organizer
      第34回日本エイズ学会学術集会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Contribution of vaccine-induced mutant epitope-crossreactive CD8+ T cells to stable control of SIVmac239 replication2019

    • Author(s)
      Takushi Nomura
    • Organizer
      The 37th Annual Symposium on Nonhuman Primate Models for AIDS
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Efficacy of vaccine-induced crossreactive CD8+ T cells targeting a Gag epitope against SIVmac239 challenge2019

    • Author(s)
      Takushi Nomura
    • Organizer
      The 67th Annual Meeting of the Japanese Society for Virology
    • Related Report
      2019 Research-status Report
  • [Presentation] ワクチン誘導Gag241-249エピトープ特異的 CD8陽性T細胞の交差反応性が SIV感染に与える影響の解析2019

    • Author(s)
      野村拓志
    • Organizer
      第33回日本エイズ学会学術集会
    • Related Report
      2019 Research-status Report
  • [Remarks] 国立感染症研究所エイズ研究センター第一研究グループ、第二研究グループ Publications

    • URL

      http://square.umin.ac.jp/arc/Matano_Research_Group_JP/Publications.html

    • Related Report
      2020 Annual Research Report
  • [Remarks] Publications, Matano Research Group

    • URL

      http://square.umin.ac.jp/arc/Matano_Research_Group_JP/Publications.html

    • Related Report
      2019 Research-status Report

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

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