ティモサイト陽性選択を誘発できる細胞系
P Hugo1, J W Kappler, D I Godfrey
1Howard Hughes Medical Institute, National Jewish Center for Immunology and Respiratory Medicine, Denver, Colorado 80206.
Nature
|December 17, 1992
まとめ
この研究は,特定の甲状腺上皮細胞がT細胞を選択できることを示しています. これらの細胞は,メジャー・ヒストコンパティビリティ・コンプレックス (MHC) タンパク質を通じて抗原を提示し,T細胞の発達を導く.
科学分野:
- 免疫学 免疫学とは
- 細胞生物学 細胞生物学
背景:
- 胸腺は,陽性選択を含むT細胞発育に不可欠です.
- 陽性選択は,T細胞が自己メジャーヒストコンパティビリティコンプレックス (MHC) タンパク質を認識することを保証します.
- 胸膜の陽性選択を媒介する特定の細胞タイプは,まだ完全に理解されていません.
研究 の 目的:
- 特殊な胸膜上皮細胞がT細胞の陽性選択を媒介するかどうかを調査する.
- 導入された上皮細胞がポジティブ・セレクションをサポートできるかどうかを判断する.
主な方法:
- 放射線を受けたマウスは,骨髄または胎児の肝臓細胞で再構成された.
- H-2bを発現するタイミック上皮細胞系が,H-2kを受容したマウスに導入されました.
- T細胞受容体の認識と制限を分析した.
主要な成果:
- I-Ab-制限のT細胞の存在は,受容体動物で検出されました.
- これは,導入されたH-2bを発現する上皮細胞が正の選択を成功裏に媒介したことを示している.
- T細胞選択における特定の上皮細胞の能力を実証する.
結論:
- 特定の甲状腺上皮細胞は,T細胞の陽性選択を媒介するのに十分である.
- この発見は,胸腺内のT細胞発達の細胞的基礎を明らかにしている.
- 適応免疫における上皮細胞サブセットの役割を強調する.
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