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相关概念视频

Immunological Memory01:23

Immunological Memory

511
Immunological memory, a pivotal pillar of the adaptive immune system, is responsible for the body's ability to remember and respond more swiftly and effectively to previously encountered pathogens. This remarkable feature is what makes vaccines so effective in preventing diseases.
What is Immunological Memory?
Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature...
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B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

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The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
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Cells of the Adaptive Immune Response01:23

Cells of the Adaptive Immune Response

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The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
746
T Cell Activation and Clonal Selection01:22

T Cell Activation and Clonal Selection

620
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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Humoral Immune Responses01:36

Humoral Immune Responses

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Overview
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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.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
740

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相关实验视频

Updated: May 22, 2025

In Vitro Differentiation Model of Human Normal Memory B Cells to Long-lived Plasma Cells
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EZH2协调内存B细胞的编程和回忆反应.

Keenan J Wiggins1, Mark E Williams1, Sakeenah L Hicks1

  • 1Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA, United States.

Journal of immunology (Baltimore, Md. : 1950)
|March 12, 2025
PubMed
概括
此摘要是机器生成的。

基因组甲基转移酶EZH2对于记忆B细胞 (MBC) 的分化和功能至关重要. 流感感染后,EZH2的损失会损害有效抗体反应的发展.

关键词:
在 EZH2 中使用.H3K27me3 在线阅读这是表观遗传学.记忆B细胞是一个B细胞.

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The Isolation, Differentiation, and Quantification of Human Antibody-secreting B Cells from Blood: ELISpot as a Functional Readout of Humoral Immunity
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相关实验视频

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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:

  • 记忆B细胞 (MBC) 对于强大的幽默免疫力至关重要,但它们差异化的表观遗传调节者仍然不清楚.
  • 了解这些调节器是增强自适应性免疫反应的关键.

研究的目的:

  • 在小鼠感染流感后,研究基因组H3氨酸27甲基转移酶EZH2在记忆B细胞形成和功能中的作用.
  • 为了确定控制MBC分化 EZH2-依赖的表观遗传程序.

主要方法:

  • 使用一种小鼠模型 (Mus musculus) 在B细胞中删除EZH2.
  • 通过流细胞计和单细胞RNA测序 (scRNA-seq) 分析了B细胞种群,包括MBC和抗体分泌细胞 (ASC).
  • 在流感感染和致命挑战后评估免疫反应.

主要成果:

  • EZH2在激活的B细胞子集中表达,在生殖中心 (GC) B细胞中含量最高.
  • EZH2删除使MBC分化偏向IgM+子集,缺少关键标记物 (CCR6,CD73) 和受损的二次ASC和GC形成.
  • scRNA-seq揭示了MBC中的EZH2-调节的基因表达程序,尽管有证据表明选择性压力维持EZH2活动.

结论:

  • EZH2是一个关键的表观遗传调节器,对正常的MBC分化和有效的二次抗体反应的发展至关重要.
  • 需要EZH2活性来维持MBCs在活性化和适应性免疫期间的功能潜力.