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相关概念视频

T Cell Types and Functions01:24

T Cell Types and Functions

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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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Regulation of Hematopoietic Stem Cells01:01

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All blood and immune cells are produced from the multipotent hematopoietic stem cells (HSCs) by the process of hematopoiesis. However, they all have a limited life span. In addition, many are depleted in immune surveillance or combatting an injury or infection. This makes blood one of the most regenerative tissues. Hematopoiesis helps replenish these blood and immune cells, restoring the body's normal functioning. However, overproduction of blood and immune cells can make them cancerous or...
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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.
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CD4+调节性T细胞缺少Helios和Eos的细胞.

Katarzyna Polak1, Patricia Marchal1, Chiara Taroni1

  • 1Université de Strasbourg, IGBMC UMR 7104- UMR-S 1258, F-67400 Illkirch, France; CNRS, UMR 7104, F-67400 Illkirch, France; Inserm, UMR-S 1258, F-67400 Illkirch, France; IGBMC, Institut de Génétique et de Biologie Moléculaire et Cellulaire, F-67400 Illkirch, France.

Biochemical and biophysical research communications
|July 6, 2023
PubMed
概括

(Ikzf2) 和Eos (Ikzf4) 是对调节T (Treg) 细胞功能至关重要的转录因子. 虽然两者都是最佳的Foxp3表达所需的,但它们调节不同的基因,并在Treg细胞衰老和整体功能中发挥非冗余的作用.

关键词:
衰老的衰老 衰老的衰老功能特异性的功能特异性.赫利奥斯和埃奥斯的转录因子淘汰出局的老鼠模型监管性T细胞 监管性T细胞

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科学领域:

  • 免疫学 免疫学 免疫学
  • 分子生物学分子生物学
  • 遗传学 是一个遗传学.

背景情况:

  • 调节性T (Treg) 细胞对于免疫平衡和预防自身免疫至关重要.
  • (Ikzf2) 和Eos (Ikzf4) 是Ikaros家族的转录因子,在Treg细胞中高度表达.
  • 它们在Treg细胞生物学中的精确,独特的作用尚未完全阐明.

研究的目的:

  • 研究Helios和Eos在Treg细胞发育和功能中的特定和潜在的冗余功能.
  • 确定合并的Helios和Eos缺乏对Treg细胞生物学的影响.
  • 确定每个因子在Treg细胞维护和衰老中的独特作用.

主要方法:

  • 产生和分析的小鼠与Ikkzf2和Ikzf4.4的生殖线删除.
  • 在体外对Treg细胞分化和抑制功能的评估.
  • 通过Helios和Eos调节的基因表达特征的分析.
  • 在老年小鼠中评估Treg细胞频率,这些老鼠有Helios或Eos缺乏.

主要成果:

  • 与单次淘汰赛小鼠相比,缺乏Helios和Eos的小鼠显示出有限的差异.
  • 双重淘汰赛Treg细胞在体外正常分化,并有效地抑制了效应T细胞.
  • 对于最佳的Foxp3蛋白水平,Helios和Eos都是必要的.
  • 赫利奥斯和埃奥斯调节了很大程度上不同的基因组.
  • 只有Helios缺乏导致受损的Treg细胞衰老,老年小鼠的频率降低.

结论:

  • 在Treg细胞生物学中,Helios和Eos扮演着不同的,非冗余的角色.
  • 虽然两者都对Treg细胞功能和Foxp3表达有贡献,但它们的监管目标显著不同.
  • 在衰老过程中,Helios在维持Treg细胞种群方面发挥着独特的作用.