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The elucidation of the thymus-intestinal-vagus nerve-spleen network in systemic lupus erythematosus.

Research Project

Project/Area Number 22K20770
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0803:Pathology, infection/immunology, and related fields
Research InstitutionKyoto University

Principal Investigator

Shirakashi Mirei  京都大学, 医学研究科, 特定病院助教 (10934367)

Project Period (FY) 2022-08-31 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords自律神経 / T細胞 / SLE / 自律神経障害 / 全身性エリテマトーデス / 迷走神経
Outline of Research at the Start

全身性エリテマトーデス(SLE)は多臓器病変を呈する自己免疫疾患であり、遺伝的素因や環境因子など多くの因子が関与している。そのため、基礎研究で見つかった治療が有効でないことがあり、有効な治療を行うには事前に層別化できることが理想である。また、免疫治療は感染症や生活習慣病などの副作用が問題になることが多い。近年、慢性炎症疾患に対して迷走神経刺激療法(VNS)が注目されている。SLEに対するVNSの治療応用を目指して、迷走神経がSLEに及ぼす免疫学的作用の解明を行う。

Outline of Final Research Achievements

In the HRV results, B6SKG exhibited higher parasympathetic activity compared to B6WT. B6SKG mice underwent vagotomy and were divided into a vagotomized group (Vx) and a sham-operated group (sham), and their phenotypes were evaluated. Immune complex deposition in the glomeruli was weaker in the Vx group, and the increase in anti-dsDNA antibodies was mild. FACS analysis showed a tendency for lower Tfh cells in the Vx group. B6SKG exhibited a slight increase in β2AR expression and a tendency for higher serum NAd levels in the Vx group. The Vx group also showed a decrease in the genus Lactobacillus in the feces of B6SKG, suggesting that the correction of T cell differentiation abnormalities due to TCR signal abnormalities through gut microbiota mediated by the autonomic nervous system contributes to SLE.

Academic Significance and Societal Importance of the Research Achievements

自己免疫疾患への迷走神経刺激術については疼痛や疲労などに対して検討されているが、疾患活動性に対する影響をみたものは多くなかった。今回、腸管の免疫に重要な役割を持つT細胞の伝達異常を背景にもつモデルで迷走神経切断を行ったところ、疾患活動性は改善した。このことは、遺伝的背景に応じて、自律神経に与える影響が異なることを示しており、どのような症例が自律神経に対する介入を行うべきかを検討する必要があることにつながる。今回、迷走神経を切断することで腸内細菌の変容を認めており、表現型も予想とは異なるものになった。胸腺におけるT細胞選択異常が、自律神経を介した腸管免疫にも影響を与えることがわかった。

Report

(2 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • Research Products

    (3 results)

All 2024 2023

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (1 results) (of which Invited: 1 results)

  • [Journal Article] TAFRO syndrome is associated with anti-SSA/Ro60 antibodies, in contrast to idiopathic castleman disease2024

    • Author(s)
      Shirakashi Mirei、Nishida Yuri、Nakashima Ran、Fujimoto Masakazu、Hiwa Ryosuke、Tsuji Hideaki、Kitagori Koji、Akizuki Shuji、Morinobu Akio、Yoshifuji Hajime
    • Journal Title

      Scientific Reports

      Volume: 14 Issue: 1 Pages: 2889-2889

    • DOI

      10.1038/s41598-024-53413-5

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Pathogenicity of IgG-Fc desialylation and its association with Th17 cells in an animal model of systemic lupus erythematosus.2023

    • Author(s)
      Yuri Nishida; Mirei Shirakashi; Noritaka Hashii; Ran Nakashima; Yoichi Nakayama; Masao Katsushima; Ryu Watanabe; Hideo Onizawa; Ryosuke Hiwa; Hideaki Tsuji; Koji Kitagori; Shuji Akizuki; Akira Onishi; Kosaku Murakami; Hajime Yoshifuji; Masao Tanaka; Tatsuaki Tsuruyama; Akio Morinobu; Motomu Hashimoto
    • Journal Title

      Modern rheumatology

      Volume: 34 Issue: 3 Pages: 523-529

    • DOI

      10.1093/mr/road054

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Presentation] TCRシグナル伝達異常が引き起こす自己免疫と腸管免疫のクロストーク2023

    • Author(s)
      白柏魅怜
    • Organizer
      Joint conference for clinical immunology
    • Related Report
      2023 Annual Research Report
    • Invited

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Published: 2022-09-01   Modified: 2025-01-30  

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