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

A novel functional antigen receptor TMD module identified as an SLE-associating SNP-related structure

Research Project

Project/Area Number 18K08384
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 54020:Connective tissue disease and allergy-related
Research InstitutionOchanomizu University

Principal Investigator

Honda Zen-ichiro  お茶の水女子大学, 保健管理センター, 客員教授 (70238814)

Co-Investigator(Kenkyū-buntansha) 本田 浩章  東京女子医科大学, 医学部, 教授 (40245064)
由良 敬  お茶の水女子大学, 基幹研究院, 教授 (50252226)
市 育代  お茶の水女子大学, 基幹研究院, 准教授 (50403316)
河野 肇  帝京大学, 医学部, 教授 (60585074)
Project Period (FY) 2018-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
KeywordsFc受容体 / TMD4ファミリー / Fc(gamma)RIIB / 全身性エリテマトーデス / 膜貫通部位 / 2量体 / IgG Fc受容体 / Fc gamma RIIb / Fc gamma RIIa / membrane-spanning 4 / 免疫グロブリンFc受容体 / 遺伝子多型 / 免疫抑制シグナル / シグナル伝達 / 膜貫通ドメイン / 自己免疫疾患 / 創薬標的 / 免疫創薬標的 / 細胞膜貫通部位 / タンパク質間結合 / 構造計算
Outline of Final Research Achievements

We proposed that transition from an inactive transmembrane dimer (TMD) to an active dimer occurs following Fc receptor crosslinking, with the GASright motif association as an essential structural process, and that the hypothesis could be validated biochemical, structural informatics, and model cell and animal analysis. During the research period, the hypothesis was successfully validated in active FcgRIIA through 1) Cys scanning TMD docking mapping, 2) structural bioinformatics, and 3) model cell and mouse analyses. Analysis of the human SLE-associated polymorphism of the suppressor FcgRIIB TMD has revealed that only the disease-related polymorphism constitutes a constitutive TMD dimer, and it paradoxically activates downstream anti-apoptotic signaling. We are also examining if co-stimulatory molecules may function via similar TMD interaction-dependent mechanisms.

Academic Significance and Societal Importance of the Research Achievements

Fc受容体(FcR)は自然免疫細胞、B細胞に広く分布し、抗体を介して外来、自己抗原を処理するとともに、免疫細胞活性化、成熟、サイトカイン産生を調節して液性免疫応答を方向づける。ヒトFcR遺伝子多型が自己免疫疾患、感染症、免疫不全と強く関連し、抗体製剤が炎症性疾患、悪性新生物治療の主要な薬剤として位置付けられること、FcR多型がその効果に影響を与えることから、FcR活性化機構の解明は新規治療開発に重要な情報となることは明らかである。本研究はTMD会合という新たなメカニズムを提唱しその意義を検証するものであり、新規の治療標的構造解明につながる可能性があると考えられる。

Report

(7 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (2 results)

All 2023 2020

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

  • [Journal Article] MBTD1 preserves adult hematopoietic stem cell pool size and function2023

    • Author(s)
      Keiyo Takubo, Phyo Wai Htun, Takeshi Ueda, Yasuyuki Sera, Masayuki Iwasaki, Miho Koizumi, Kohei Shiroshita, Hiroshi Kobayashi, Miho Haraguchi, Shintaro Watanuki, Zen-ichiro Honda, et. at.
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 120

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Kdm6a Deficiency Activates Inflammatory Pathways, Promotes M2 Macrophage Polarization, and Causes Bladder Cancer in Cooperation with p53 Dysfunction2020

    • Author(s)
      Kobatake Kohei et al., Honda Zen-ichiro et al. and Honda Hiroaki
    • Journal Title

      Clinical Cancer Research

      Volume: 26 Issue: 8 Pages: 2065-2079

    • DOI

      10.1158/1078-0432.ccr-19-2230

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research

URL: 

Published: 2018-04-23   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi