組織内記憶T細胞の生存には,外因的な脂質の吸収と代謝が必要である
Youdong Pan1, Tian Tian1, Chang Ook Park1
1Department of Dermatology and Harvard Skin Disease Research Center, Brigham and Women's Hospital, Boston, Harvard Medical School, Boston, Massachusetts, USA.
Nature
|February 21, 2017
まとめ
組織内記憶T (TRM) 細胞は,脂肪酸結合タンパク質4と5 (FABP4/5) を使用して,自由脂肪酸を吸収し,長期間生存と病原体保護のためにミトコンドリアの代謝を促進します. これはTRM細胞の持続性と機能のための新しい経路を強調しています.
科学分野:
- 免疫学
- 細胞生物学
- メタボリズム
背景:
- 組織内定の記憶T細胞 (TRM) は,バリア部位における長期的な免疫に不可欠である.
- TRM細胞の長寿を支える代謝経路はほとんど不明である.
研究 の 目的:
- CD8+ TRM細胞の持続的生存の背後にある分子メカニズムを解明する.
- TRM細胞の機能と持続性における脂質代謝の役割を調査する.
主な方法:
- マウス CD8+ TRM細胞における遺伝子発現の分析
- T細胞特異のFabp4/Fabp5ノックアウトマウスの生成と評価
- 自由脂肪酸の吸収,ミトコンドリアの代謝,細胞生存を測定するインビトロおよびインビボ測定法.
- ウイルスは免疫を評価するモデルに挑戦します
主要な成果:
- マウスのCD8+ TRM細胞は,自由脂肪酸 (FFA) の吸収を促進するFABP4とFABP5を高度に発現する.
- T細胞特異的なFABP4/5の欠乏は,FFAの吸収を阻害し,T細胞の生存期間を短縮し,酸化代謝を減少させます.
- ミトコンドリアのFFAβ酸化を阻害すると,TRM細胞の持続性と保護免疫が損なわれます.
- また,ヒトのTRM細胞はFABP4/5の発現が増加し,FFAの吸収も増加している.
結論:
- FABP4とFABP5は,CD8+ TRM細胞の維持,長寿,および保護機能に不可欠である.
- CD8+ TRM細胞は,組織持続のために外因的なFFAとミトコンドリアの酸化代謝を利用する.
- FFAの代謝をターゲットにすることで,TRM細胞媒介免疫を高める潜在的な戦略を示しています.
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