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Regulatory T cells and their Potential for Tolerance Induction in Myasthenia Gravis Towards Precision Medicine

Research Project

Project/Area Number 19K07206
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 47060:Clinical pharmacy-related
Research InstitutionTokyo University of Pharmacy and Life Science

Principal Investigator

TANAKA SACHIKO  東京薬科大学, 薬学部, 助教 (50328556)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords重症筋無力症 / 制御性T細胞 / エピジェネティック制御 / プレシジョンメディスン / 重症筋無力症患者
Outline of Research at the Start

MGでは眼瞼下垂,複視などの眼症状,四肢・頸筋の筋力低下,構音障害,嚥下障害が認められ,重症例では呼吸障害を来す.本研究では,このようなMG症状を軽減あるいは消失させる治療法や再発予防策を確立する.申請者らは,MG患者末梢におけるTreg細胞数が低下していることをすでに明らかとしている.そこで,MG患者におけるTreg細胞の分化あるいは抑制機能を制御する遺伝子に着目し,自己免疫寛容の誘導を目的とした治療の有用性について明らかとする.MG患者PBMCを用いて,Treg細胞に関連するゲノム情報あるいは分子情報を解析する.過剰な自己免疫応答を制御するために有効な治療法を探索する.

Outline of Final Research Achievements

The transcription factor forkhead box P3 (FOXP3) is specifically expressed in CD4+CD25+ regulatory T (Treg) cells, and it is regarded as a critical developmental and functional factor for Treg cells. We found that the FOXP3 gene methylation in patients with myasthenia gravis was significantly higher than healthy subjects, which could contribute the immunodeficiency of MG. However, it was not shown that the influence of the enzyme for demethylation, TET2 on the stable FOXP3 expression. Interleukin-10 (IL-10) is a pleiotropic cytokine with an important anti-inflammatory and contributed to the immunoregulatory function of Treg cells. In this study, we showed the relationship between the percentage of IL-10+CD19+ B cells and the frequency of Treg cells in CD4+ T cells. We also demonstrated that the IL-10 production on CD4+ T cells was elevated in the MG patients with the galactose-deficient IgG.

Academic Significance and Societal Importance of the Research Achievements

本研究によりMG患者Treg細胞の分化誘導にFOXP3遺伝子のメチル化制御が有用である可能性が示唆された.抗炎症性サイトカインであるIL-10がTreg細胞の誘導に関与するとともに,MG患者由来IgGにおけるガラクトース欠損のレベルとの関連が明らかとなった.自己免疫疾患における分子標的薬による治療戦略の構築に,末梢血免疫細胞のタイピングに基づくプレシジョンメディスンの可能性を示したものと思われる.

Report

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

    (6 results)

All 2019

All Journal Article (4 results) (of which Peer Reviewed: 4 results) Presentation (2 results)

  • [Journal Article] Effects of the tooth-coating solution and its components on the proliferation and production of inflammatory cytokines in mitogen-activated human peripheral blood mononuclear cells2019

    • Author(s)
      Kentaro Sugiyama, Sachiko Wada, Sachiko Tanaka, Kaoruko Urai, Toshihiko Hirano
    • Journal Title

      Curr Top Pharmacol

      Volume: 23 Pages: 93-101

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Tetrandrine and cepharanthine induce apoptosis through caspase cascade regulation, cell cycle arrest, MAPK activation and PI3K/Akt/mTOR signal modification in glucocorticoid resistant human leukemia Jurkat T cells2019

    • Author(s)
      Wencheng Xu W, Xiaoqin Wang, Yuanchao Tu, Hiroshi Masaki, Sachiko Tanaka, Kenji Onda, Kentaro Sugiyama, Haruki Yamada, Toshihiko Hirano
    • Journal Title

      Chem Biol Interact

      Volume: 310 Pages: 108726-108726

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Arsenic disulfide combined with L-buthionine-(S, R)-sulfoximine induces synergistic antitumor effects in two-dimensional and three-dimensional models of MCF-7 breast carcinoma cells2019

    • Author(s)
      Yuxue Zhao, Sachiko Tanaka, Bo Yuan, Kentaro Sugiyama, Kenji Onda, Anna Kiyomi, Norio Takagi, Munetoshi Sugiura, Toshihiko Hirano
    • Journal Title

      Am J Chinese Med

      Volume: 47 Pages: 1149-1170

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Vitamin K2 immunosuppressive effect on pediatric patients with atopic dermatitis2019

    • Author(s)
      Wencheng Xu, Kehan Meng, Hongguang Wu, Taro Miura, Shunsuke Suzuki, Chiyotanda Masako, Sachiko Tanaka, Kentaro Sugiyama, Hisashi Kawashima, Toshihiko Hirano
    • Journal Title

      Pediatr Int

      Volume: 61 Pages: 1188-1195

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 関節リウマチ患者末梢血リンパ球に対するメトトレキサートとビタミンK2の相乗的抑制効果2019

    • Author(s)
      杉山健太郎、呉 弘光、許 文成、小野寺大樹、海老原弥咲、小宮遼太郎、田中祥子、太原恒一郎、沢田哲治、平野俊彦
    • Organizer
      第98回免疫アレルギー研究会
    • Related Report
      2019 Research-status Report
  • [Presentation] ヒトTリンパ球性白血病細胞株に対するビタミンK類の増殖抑制作用、アポトーシス誘導作用および細胞周期修飾作用2019

    • Author(s)
      呉弘光、許文成、田中祥子、杉山健太郎、平野俊彦
    • Organizer
      第106回新都心血液研究会
    • Related Report
      2019 Research-status Report

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

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