アンチゲン処理とプレゼンテーションに関与する分子の共同局所化は,初期の内皮細胞区画におけるものです
L E Guagliardi1, B Koppelman, J S Blum
1Department of Pharmacy, School of Pharmacy, University of California, San Francisco 94143.
Nature
|January 11, 1990
まとめ
免疫電子顕微鏡では,抗原の処理と表示のための細胞内経路が定義されています. 辺縁内細胞区は,T細胞のプレゼンテーションのためにペプチドがクラスII分子に結合することを促進します.
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:
- 細胞内抗原の処理とプレゼンテーションは,適応性免疫にとって極めて重要です.
- 関連する特定の細胞区画を理解することは,免疫応答機構の鍵です.
研究 の 目的:
- 抗原の処理とプレゼンテーションのための細胞内トラフィックの経路を定義する.
- 抗原ペプチドがクラスII同位体適合性分子と結合する細胞区画を特定する.
主な方法:
- 免疫電子顕微鏡を用いて細胞内経路を視覚化しました.
- 細胞内コンパートメント内の分子機構の分析.
主要な成果:
- クラスIIヒストコンパティビリティ分子の輸出経路と抗原輸入経路は収束する.
- この収束は,必要な分子機構を含む外周内細胞区間で起こります.
- このコンパートメントは,内細胞化抗原ペプチドがクラスIIの分子に結合することを促進します.
結論:
- 特定の外周内細胞区は,抗原の処理とプレゼンテーションの重要な場所として機能します.
- このコンパートメントは,T細胞認識のためのペプチド-MHCクラスII複合体の組み立てを可能にします.
関連する概念動画
Receptor-mediated Endocytosis
Overview
Golgi Apparatus
As they leave the Endoplasmic Reticulum (ER), properly folded and assembled proteins are selectively packaged into vesicles. These vesicles are transported by microtubule-based motor proteins and fuse together to form vesicular tubular clusters, subsequently arriving at the Golgi apparatus, a eukaryotic endomembrane organelle that often has a distinctive ribbon-like appearance.The Golgi apparatus is a major sorting and dispatch station for the products of the ER. Newly arriving vesicles enter...
Receptor-mediated Endocytosis
Receptor-mediated endocytosis is when bulk amounts of specific molecules are imported into a cell after binding to cell surface receptors. The molecules bound to these receptors are taken into the cell through inward folding of the cell surface membrane, which is eventually pinched off into a vesicle within the cell. Structural proteins, such as clathrin, coat the budding vesicle.
Clathrin-Mediated Endocytosis of LDL
One well-characterized example of receptor-mediated endocytosis is the...
Clathrin-Mediated Endocytosis of LDL
One well-characterized example of receptor-mediated endocytosis is the...
Golgi Apparatus
Properly folded and assembled proteins are selectively packaged into vesicles that exit the ER. Motor proteins transport these vesicles to the Golgi apparatus for adding modifications that make these proteins functional at their destination.
The Golgi apparatus is a eukaryotic organelle that has a distinctive ribbon-like appearance. It is a primary sorting and dispatch station for cargo arriving from the ER. Newly arriving vesicles enter the cis face of the Golgi, closest to the ER, and are...
The Golgi apparatus is a eukaryotic organelle that has a distinctive ribbon-like appearance. It is a primary sorting and dispatch station for cargo arriving from the ER. Newly arriving vesicles enter the cis face of the Golgi, closest to the ER, and are...
Receptor-Mediated Endocytosis
Receptor-mediated endocytosis is when bulk amounts of specific molecules are imported into a cell after binding to cell surface receptors. The molecules bound to these receptors are taken into the cell through inward folding of the cell surface membrane, which is eventually pinched off into a vesicle within the cell. Structural proteins, such as clathrin, coat the budding vesicle.
Clathrin-Mediated Endocytosis of LDL
One well-characterized example of receptor-mediated endocytosis is the...
Clathrin-Mediated Endocytosis of LDL
One well-characterized example of receptor-mediated endocytosis is the...
Antigen Processing Pathways
MHC molecules are key players in the immune response, enabling T cells to recognize and respond to specific antigens. They are present on the surface of all nucleated cells in the body and are instrumental in presenting antigens to T cells and activating them. T cells recognize the MHC-antigen complex and initiate an immune response. MHC class I and MHC class II are two main types of MHC molecules, each associated with a distinct antigen processing pathway.
MHC Class I: Presenting Endogenous...
MHC Class I: Presenting Endogenous...


