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Functional analysis of plasmacytoid dendritic cells regulated by lipid environmental responses

Research Project

Project/Area Number 19K24307
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0909:Sports sciences, physical education, health sciences, and related fields
Research InstitutionTohoku University

Principal Investigator

Kobayashi Shuhei  東北大学, 医学系研究科, 助教 (90851345)

Project Period (FY) 2019-08-30 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
KeywordsFABP / pDC / Immune response / FABP5 / lipid metabolism / 脂質応答 / 免疫制御
Outline of Research at the Start

近年、脂質の重要な構成要素である長鎖脂肪酸の摂取量変化による炎症性疾患の寛解や増悪が報告され、脂質栄養環境による免疫細胞の制御に大きな注目が集まっている。しかしながら、免疫細胞内外の脂質栄養環境が、どのような分子メカニズムにより免疫機能制御に影響するかは未だ謎に包まれている。本申請では、免疫制御に重要な制御性T細胞 (Treg)とその誘導因子の一つである形質細胞様樹状細胞 (pDC)に着目し、脂質環境変化に対してpDCとTregの機能的連関がいかなる応答を示すのかについて、細胞レベルおよび病態モデルで検証する。

Outline of Final Research Achievements

We found that plasmacytoid dendritic cells (pDCs) express FABP5. FABP5 deficiency did not affect the distribution of pDCs in the spleen or lymph nodes. Furthermore, Toll-like receptor 7 (TLR7) and TLR9, which selectively express pDCs, were comparably expressed at steady state, but upon ligand stimulation, FABP5-deficient pDCs showed overexpression of inflammation-related genes. On the other hand, there was no significant difference in immunosuppression-related gene expression, suggesting that FABP5 may play a role in regulating the inflammatory balance of pDCs. They also found that increased expression of inflammation-related genes was caused by increased expression of the transcription factor IRF7 and increased phosphorylation of p 65, a component of NF-κB.

Academic Significance and Societal Importance of the Research Achievements

pDCは炎症促進および抑制の機能を有する免疫応答の中枢を担う自然免疫細胞であり、様々な炎症性疾患の制御へ関与する。本研究から、pDCにおけるFABP5を介した脂質恒常性の維持が炎症制御に重要であることが明らかとなった。免疫細胞における脂質代謝変化の重要性が注目される中で、pDCにおける脂質代謝変化の影響を明らかにした報告はなく、pDCを介した免疫恒常性維持の理解や分子基盤の構築へ向けて大きな前進となった。今後、pDC内のFABP5による脂質恒常性が周辺細胞へどのような影響を及ぼすのか、細胞連関の観点から明らかにすると共に、in vivo実験から炎症性疾患の病態制御との関連性をより強固に示す。

Report

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

    (5 results)

All 2021 2020

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

  • [Journal Article] Fatty acid‐binding protein 3 controls contact hypersensitivity through regulating skin dermal Vγ4 + γ/δ T cell in a murine model2020

    • Author(s)
      Kobayashi Shuhei、Phung Hai The、Kagawa Yoshiteru、Miyazaki Hirofumi、Takahashi Yu、Asao Atsuko、Maruyama Takashi、Yoshimura Akihiko、Ishii Naoto、Owada Yuji
    • Journal Title

      Allergy

      Volume: - Issue: 6 Pages: 1776-1788

    • DOI

      10.1111/all.14630

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Fatty acid-binding protein 5 limits ILC2-mediated allergic lung inflammation in a murine asthma model.2020

    • Author(s)
      Kobayashi S, Tayama S, Phung TH, Kagawa Y, Miyazaki H, Takahashi Y, Maruyama T, Ishii N, Owada Y
    • Journal Title

      Sci Rep

      Volume: 10 Issue: 1 Pages: 16617-16617

    • DOI

      10.1038/s41598-020-73935-y

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Fatty acid binding protein 3 regulates differentiation of IgM-producing plasma cells.2020

    • Author(s)
      Shuhei Kobayashi, Hai The Phung, Shunichi Tayama, Yoshiteru Kagawa, Hirofumi Miyazaki, Yui Yamamoto, Takashi Maruyama, Naoto Ishii, Yuji Owada
    • Journal Title

      The FEBS Journal

      Volume: In Press Issue: 4 Pages: 1130-1141

    • DOI

      10.1111/febs.15460

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Fatty acid-binding protein 3 controls contact hypersensitivity through regulating skin dermal Vγ4+ γ/δ T cell development2021

    • Author(s)
      Shuhei Kobayashi、Yoshiteru Kagawa、Hirohumi Miyazaki、Yuji Owada
    • Organizer
      第126回日本解剖学会総会・学術集会、第98回日本生理学会大会 合同大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 接触性過敏症におけるFABP3の関与機構2020

    • Author(s)
      小林周平、香川慶輝、宮崎啓史、大和田祐二
    • Organizer
      第125回日本解剖学会学術総会全国学術集会 (誌上開催)
    • Related Report
      2019 Research-status Report

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Published: 2019-09-03   Modified: 2022-01-27  

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