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相关概念视频

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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T Cell Types and Functions01:24

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When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
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Reprogramming alters the gene expression in somatic cells, transforming them into induced pluripotent stem (iPS) cells over several generations. Scientists can reprogram cells by introducing genes for four transcription factors—Oct4, Sox2, Klf4, and c-Myc (OSKM) by viral or non-viral methods. These factors are also known as Yamanaka factors after Shinya Yamanaka, who first generated iPS cells using mouse skin cells. Yamanaka was awarded the Nobel Prize in Physiology or Medicine in 2012...
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Nuclear reprogramming is a process of transforming one cell type into an unrelated cell type by epigenetic changes that alter the cell’s original gene expression pattern. Such epigenetic changes force cells to express a different set of genes, which play a significant role in inducing transformation into other cell types. Nuclear reprogramming offers applications in reproductive cloning for livestock propagation and regenerative medicine — developing patient-specific cells for...
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相关实验视频

Updated: May 16, 2025

Mouse Naïve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets
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通过Tet1/3的发育表观遗传编程决定了外围CD8T细胞的命运.

Kara M Misel-Wuchter1,2,3, Andrew L Thurman3, Jordan T Johnson4

  • 1Inflammation Program, University of Iowa, Iowa City, IA, USA.

EMBO reports
|April 2, 2025
PubMed
概括

在T细胞发育过程中,Tet酶 (Tet1/3) 对于产生长寿CD8记忆T细胞至关重要. 切除Tet1/3导致分化为短寿命的效应细胞,突出显示它们在免疫记忆中的重要作用.

关键词:
脱甲基化 DNA 脱甲基化效应器 CD8 T 细胞表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.记忆 CD8 T 细胞在T细胞发育过程中

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科学领域:

  • 免疫学 免疫学 免疫学
  • 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
  • 细胞生物学 细胞生物学

背景情况:

  • 纯粹的CD8 T细胞在感染后分化为效应细胞和记忆细胞.
  • 产生长期存储的CD8 T细胞是一个重大挑战.
  • 酶通过DNA脱甲基化调节基因转录,但它们在CD8T细胞分化中的作用尚不清楚.

研究的目的:

  • 研究Tet酶 (Tet1/3) 在CD8T细胞效应因子和记忆差异化中的作用.
  • 了解控制CD8T细胞命运决定的表观遗传机制.

主要方法:

  • 在T细胞发育过程中和成熟的CD8T细胞中使用了 Tet1/3 废除的小鼠.
  • 进行全基因组分析以评估染色体景观和基因表达.
  • 分析了 CD8 T 细胞在感染后分化为效应器和记忆子集.

主要成果:

  • 缺乏Tet1/3的CD8 T细胞在发育过程中优先分化为短寿命的效应细胞和效应记忆细胞.
  • Tet1/3通过授权T细胞受体激活T细胞受体激活下游基因的染色质景观,调节T细胞命运.
  • 在成熟的CD8 T细胞中,Tet1/3对于效应细胞和记忆细胞命运是不可或缺的.

结论:

  • 在CD8T细胞分化过程中,Tet1/3在特定环境中发挥作用.
  • 在T细胞早期发育过程中,通过Tet1/3进行DNA脱甲基化对于产生长寿CD8记忆T细胞至关重要.
  • 研究结果提供了对增强抗感染CD8记忆T细胞生成途径的见解.