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Isolation, Identification, and Purification of Murine Thymic Epithelial Cells
Published on: August 8, 2014
甲状腺上皮のオートファギーはT細胞のレパートリーを形成し,耐性には不可欠です
Jelena Nedjic1, Martin Aichinger, Jan Emmerich
1Research Institute of Molecular Pathology, Doktor Bohr Gasse 7, 1030 Vienna, Austria.
Nature
|August 15, 2008
まとめ
甲状腺上皮細胞 (TECs) の自動死は,T細胞の発達と自己耐性にとって極めて重要です. TECにおけるこのプロセスを妨害すると,炎症や自己免疫疾患が発生し,自己抗原を提示するオートファギーの役割が強調されます.
科学分野:
- 免疫学 免疫学とは
- 細胞生物学 細胞生物学
- 分子生物学は分子生物学である.
背景:
- 甲状腺上皮細胞 (TEC) にあるメジャーヒストコンパティビリティ・コンプレックスクラスII (MHC II) 分子は,CD4 T細胞に対する自己抗原を提示し,免疫耐性にとって不可欠である.
- TECによる抗原プレゼンテーションは,特にエンドサイトーシスを超えた非常識な経路に関して,完全に理解されていません.
研究 の 目的:
- マウスチムスのT細胞レパートリー選択中のTECによる抗原プレゼンテーションにおけるマクロオートファギーの役割を調査する.
- TECにおける自閉性の障害がT細胞耐性および潜在的自己免疫反応に与える影響を決定する.
主な方法:
- TECにおける構成的なオートファギーの評価レベル.
- 遺伝的に,特にTECsでオートファギーに干渉します.
- MHC-II-ペプチドレパートリーとT細胞選択への影響を分析した.
- 評価されたT細胞レパートリー機能と自己免疫症状 in vivo.
主要な成果:
- TECは,他のほとんどの組織とは異なり,オートファギーの高い構成レベルを示しています.
- TECにおけるオートファギーの遺伝的障害は,特定のMHC-II-制限されたT細胞特異性の選択を変化させた.
- TECのオートファギーの障害は重度の大腸炎と多臓器炎症を引き起こした.
結論:
- TECのオートファギーは,MHC-II-ペプチドレパートリーを組織特異の自己抗原を含む細胞内抗原に向けます.
- このオートファジー主導のプレゼンテーションは,T細胞の選択と自己耐性T細胞レパートリーの生成に不可欠です.
- TECにおけるオートファギーの障害は,自己耐性を損ない,自己免疫疾患につながる.
関連する概念動画
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