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T Cell Activation and Clonal Selection01:22

T Cell Activation and Clonal Selection

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T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
Naive T cells that have not yet encountered an antigen express two primary CD...
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Mitochondrial Precursor Proteins01:39

Mitochondrial Precursor Proteins

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Mitochondrial precursors are partially unfolded or loosely folded polypeptide chains. Newly synthesized precursors are inhibited from spontaneously folding into their native conformation by the cytosolic chaperones, heat shock proteins 70 (Hsp70), and mitochondrial import stimulation factors (MSFs). Precursors bound to MSFs are guided to the TOM70-TOM37 receptors, while precursors bound to Hsp70  chaperones are targetted to TOM20-TOM22 receptor complexes.
Most of the mitochondrial...
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Electron Transport Chain: Complex I and II01:46

Electron Transport Chain: Complex I and II

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The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
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Measuring Mitochondrial Function of Na&#239;ve and Effector CD8 T Cells
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Measuring Mitochondrial Function of Naïve and Effector CD8 T Cells

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CD28によるミトコンドリア・プライミング

Ramon I Klein Geltink1, David O'Sullivan1, Mauro Corrado1

  • 1Department of Immunometabolism, Max Planck Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany.

Cell
|September 19, 2017
PubMed
まとめ
この要約は機械生成です。

CD28信号は,ミトコンドリア機能と代謝能力を強化することによって,効果的な記憶T細胞を生成するために不可欠です. CD28がなければ,T細胞は無神経になり,二次抗原への暴露に反応することができません.

キーワード:
CD28 についてCD8 T細胞Cpt1a について採用細胞免疫療法コスティミュレーションメモリT細胞ミル33ミトコンドリア結晶の改造ミトコンドリアの形態余分な呼吸能力

さらに関連する動画

Real-time Monitoring of Mitochondrial Respiration in Cytokine-differentiated Human Primary T Cells
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Real-time Monitoring of Mitochondrial Respiration in Cytokine-differentiated Human Primary T Cells

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Experimental Approaches to Study Mitochondrial Localization and Function of a Nuclear Cell Cycle Kinase, Cdk1
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Experimental Approaches to Study Mitochondrial Localization and Function of a Nuclear Cell Cycle Kinase, Cdk1

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関連する実験動画

Last Updated: Feb 22, 2026

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Real-time Monitoring of Mitochondrial Respiration in Cytokine-differentiated Human Primary T Cells
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Experimental Approaches to Study Mitochondrial Localization and Function of a Nuclear Cell Cycle Kinase, Cdk1
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Experimental Approaches to Study Mitochondrial Localization and Function of a Nuclear Cell Cycle Kinase, Cdk1

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科学分野:

  • 免疫学
  • 細胞の代謝
  • ミトコンドリア生物学

背景:

  • CD28の共刺激なしのT細胞受容体 (TCR) 信号は,無能記憶T細胞を生成する.
  • 無能なT細胞は二次抗原被曝に反応し,保護免疫を制限する.

研究 の 目的:

  • 活性化中のT細胞の代謝再プログラムにおけるCD28信号伝達の役割を調査する.
  • 早期のCD28信号が保護性T細胞の発達にどのように影響するかを理解する.

主な方法:

  • T細胞の活性化と記憶形成を評価するフロー細胞測定法
  • 脂肪酸酸化 (FAO) と余呼吸能力 (SRC) を測定するミトコンドリア測定法.
  • CD28シグナル伝達に関与する調節経路を特定するためのマイクロRNA分析.

主要な成果:

  • 細胞分裂前にミトコンドリアのFAOとSRCを強化する.
  • CD28の欠如は,マイクロRNA-33 (miR33) によって媒介されるCpt1a発現の弱まりにつながり,代謝の妥協を引き起こす.
  • 早期のCD28依存型ミトコンドリアプリミングは,T細胞の結晶の再構築,SRCの発達,および再刺激時の急速なサイトカイン生成に不可欠である.

結論:

  • 初期CD28信号は,T細胞ミトコンドリアの活性化に不可欠であり,保護記憶に必要な潜在代謝能力を確立します.
  • CD28媒介の代謝プログラミングは,強固な二次応答を可能にする機能記憶T細胞の開発に不可欠です.