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Generation of Human Alloantigen-specific T Cells from Peripheral Blood
Published on: November 21, 2014
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クラスIb抗原に特異的な全活性T細胞によって認識されるタップ依存型リーダーペプチドの識別
C J Aldrich1, A DeCloux, A S Woods
1Department of Microbiology, University of Texas Southwestern Medical Center at Dallas 75235-9048.
Cell
|November 18, 1994
まとめ
Qa-1決定変容体 (Qdm) 遺伝子は,クラスIb抗原Qa-1の細胞毒性Tリンパ球 (CTL) の認識に不可欠である. ほとんどのDアレル遺伝子はQdmとして機能し,特定のペプチドがCTL認識を回復します.
科学分野:
- 免疫学 免疫学とは
- 分子生物学は分子生物学である.
- T細胞生物学について
背景:
- Ibクラス抗原Qa-1の細胞毒性Tリンパ球 (CTL) 認識は,しばしば追加の遺伝子,Qa-1決定変容体 (Qdm) に依存する.
- CTL認識と抗原プレゼンテーションにおけるQdmの役割の基礎となる正確な分子機構は,まだ完全に理解されていません.
研究 の 目的:
- Qdmの分子同一性と,Qa-1のCTL認識におけるその役割を特定する.
- Dアロランチゲンから派生した特定のペプチド配列がCTL認識に与える影響を調査する.
- Qdm関連ペプチドのプレゼンテーションにおけるペプチドトランスポーターの関与を調査する.
主な方法:
- Qdmを特定するための遺伝子解析により,ほとんどのDアレル遺伝子 (Dkを除く) との同一性を明らかにした.
- Dアロアンチゲンから派生したノンアマーペプチドを用いたペプチド分析により,CTL認識を回復する.
- 改変ペプチドのCTL認識の評価とペプチド発現におけるTapトランスポーターの役割.
主要な成果:
- QdmはほとんどのDアレル遺伝子と同一であることが判明し,Dkは例外である.
- Dアロアンチゲンからのノンアマーペプチドは,Qdm欠乏細胞のCTL認識を回復させた.
- P3でAla to Valの置換を伴うDkペプチドの変種は,標的細胞溶解のためにかなり多くのペプチドを必要とし,Qdmペプチド発現のためにTapトランスポーターは必要であった.
結論:
- この研究は,Qdmを主にDアレル遺伝子として識別し,特定のD-derivedペプチドがCTLsによってQa-1認識を回復できることを実証しています.
- この発見は,CTL全活性において,Tapトランスポーターを含むペプチド配列とプレゼンテーション経路の重要性を強調しています.
- この研究は,アルロ活性性を解剖し,クラスIbの分子を含む抗原プレゼンテーション経路を理解するための貴重なモデルを提供します.
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