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Molecular recognition of immune inhibitory receptor, LILRB2, with HLA-G2 and various ligands

Research Project

Project/Area Number 18K06073
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 43020:Structural biochemistry-related
Research InstitutionHokkaido University

Principal Investigator

Kuroki Kimiko  北海道大学, 薬学研究院, 准教授 (90553313)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
KeywordsLILRB2 / HLA-G2 / ANGPTL2 / 相互作用解析 / バイオ医薬品 / 構造解析 / 抗体 / 免疫チェックポイント / HLA-G / 立体構造解析
Outline of Final Research Achievements

To identify the binding site of the receptor LILRB2 to the LILRB2 ligand proteins containing HLA-G2, I examined the binding competitivity with HLA-G1. Next, I established a method for identifying critical region using the result that LILRB2 modified at all Lysine residues cannot bind to HLA-G2. Furthermore, I prepared a series of LILRB2 mutants extensively replaced with LILRB1-type amino acids to identify HLA-G2 binding sites on LILRB2 because HLA-G2 does not bind to LILRB1. Finally, I performed an initial screening of antibodies and small- and medium-molecular compounds to regulate LILRB2 signaling.

Academic Significance and Societal Importance of the Research Achievements

HLA-G2は、胎盤で胎児が母体から免疫的に拒絶されずに妊娠が成立するために重要な生体内免疫抑制分子HLA-Gの種類のひとつであり、免疫抑制能を発揮するバイオ医薬品としての開発を目指している。一方で、HLA-G2の受容体LILRB2は他にも多種のリガンドと相互作用し、多様なシグナル伝達に寄与しているため、それぞれのリガンドとの相互作用メカニズムや細胞内に伝わるシグナルを詳細に理解することが臨床応用に向けて必須である。本研究では、それぞれのリガンドのLILRB2結合部位の同定、およびLILRB2シグナルを制御する免疫制御候補分子のスクリーニング法を確立、創薬応用につながる基礎データを得た。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (8 results)

All 2021 2020 2019 2018

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

  • [Journal Article] Efficient preparation of human and mouse CD1d proteins using silkworm baculovirus expression system2020

    • Author(s)
      Kusaka Hiroki、Kita Shunsuke、Tadokoro Takashi、Yoshida Kouki、Kasai Yoshiyuki、Niiyama Harumi、Fujimoto Yukari、Hanashima Shinya、Murata Michio、Sugiyama Shigeru、Ose Toyoyuki、Kuroki Kimiko、Maenaka Katsumi
    • Journal Title

      Protein Expression and Purification

      Volume: 172 Pages: 105631-105631

    • DOI

      10.1016/j.pep.2020.105631

    • NAID

      120007147244

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Therapeutic effects of soluble human leukocyte antigen G2 isoform in lupus-prone MRL/lpr mice2020

    • Author(s)
      Watanabe Hiroshi、Kuroki Kimiko、Yamada Chisato、Saburi Yukari、Maeda Naoyoshi、Maenaka Katsumi
    • Journal Title

      Human Immunology

      Volume: 81 Issue: 4 Pages: 186-190

    • DOI

      10.1016/j.humimm.2019.11.002

    • NAID

      120007034052

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Structural and Functional Basis for LILRB Immune Checkpoint Receptor Recognition of HLA-G Isoforms2019

    • Author(s)
      Kuroki Kimiko、Matsubara Haruki、Kanda Ryo、Miyashita Naoyuki、Shiroishi Mitsunori、Fukunaga Yuko、Kamishikiryo Jun、Fukunaga Atsushi、Fukuhara Hideo、Hirose Kaoru、Hunt Joan S.、Sugita Yuji、Kita Shunsuke、Ose Toyoyuki、Maenaka Katsumi
    • Journal Title

      The Journal of Immunology

      Volume: 203 Issue: 12 Pages: 3386-3394

    • DOI

      10.4049/jimmunol.1900562

    • NAID

      120007018379

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Evaluation of the Reactivity and Receptor Competition of HLA-G Isoforms toward Available Antibodies: Implications of Structural Characteristics of HLA-G Isoforms2019

    • Author(s)
      Furukawa Atsushi、Meguro Manami、Yamazaki Rika、Watanabe Hiroshi、Takahashi Ami、Kuroki Kimiko、Maenaka Katsumi
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 20 Issue: 23 Pages: 5947-5947

    • DOI

      10.3390/ijms20235947

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 全身性エリテマトーデスモデルマウスにおけるHLA-G2蛋白質の発症抑制効果の検証2021

    • Author(s)
      渡邊 紘士、黒木 喜美子、山田 千聖、佐分利 由香里、高橋 愛実、前田 直良、前仲 勝実
    • Organizer
      第141回日本薬学会年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Immunosuppressive effects of HLA-G2 protein in SLE model mice2020

    • Author(s)
      Hiroshi Watanabe, Kimiko Kuroki, Chisato Yamada, Yukari Saburi, Naoyoshi Maeda, Katsumi Maenaka
    • Organizer
      第20回日本蛋白質科学会年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Immunosuppressive function of HLA-G2 protein in vivo2019

    • Author(s)
      Hiroshi Watanabe, Kimiko Kuroki, Chisato Yamada, Yukari Saburi, Naoyoshi Maeda, Katsumi Maenaka
    • Organizer
      第48回日本免疫学会学術集会
    • Related Report
      2019 Research-status Report
  • [Presentation] 多様な免疫抑制タンパク質HLA-Gの機能・構造解析2018

    • Author(s)
      黒木喜美子
    • Organizer
      日本組織適合性学会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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