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相关概念视频

B Cell Activation and Differentiation01:24

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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.
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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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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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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...
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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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Flow Cytometric Characterization of Murine B Cell Development
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DNAJA3 调节B细胞发育和免疫功能.

Stephanie L Sayson1, Jia-Ning Fan2, Chien-Liang Ku3

  • 1Department of Life Science, Fu-Jen Catholic University, New Taipei, Taiwan; Institute of Applied Science & Engineering, Fu-Jen Catholic University, New Taipei, Taiwan.

Biomedical journal
|July 24, 2023
PubMed
概括
此摘要是机器生成的。

瘤抑制剂DNAJA3 (DNAJA3) 对B细胞发育和免疫功能至关重要. 它的缺乏会影响B细胞的成熟,减少免疫球蛋白的产生,并影响线粒体的健康.

关键词:
B细胞的发育过程DNAJA3JA3 DNAJA3JA3 DNAJA3 DNAJA3 DNAJA3线粒体复杂蛋白质是线粒体的复杂蛋白质.线粒体功能障碍 线粒体功能障碍时间 时间

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科学领域:

  • 免疫学 免疫学 免疫学
  • 细胞生物学 细胞生物学
  • 线粒体生物学 线粒体生物学

背景情况:

  • DnaJ同类子家族A成员3 (DNAJA3),也称为瘤影像盘1 (Tid1),对T细胞发育至关重要,并在淋巴细胞存活中起到瘤抑制作用.
  • DNAJA3在B细胞发育和免疫功能中的特定作用以前没有被阐明.
  • 这项研究研究了DNAJA3在B细胞中的功能,使用B细胞特异的DNAJA3淘汰赛小鼠模型.

研究的目的:

  • 研究DNAJA3在B细胞发育中的生理功能.
  • 为了确定DNAJA3缺乏对B细胞免疫功能的影响.
  • 阐明B细胞中DNAJA3损失所影响的潜在机制,特别是线粒体功能.

主要方法:

  • 使用B细胞特异性DNAJA3淘汰 (CD19-Cre/+;DNAJA3flx/flx) 的小鼠模型.
  • 通过流式细胞计量对B细胞种群和线粒体含量/功能进行了特征化分析.
  • 评估了B细胞芽生殖 (CFSE,MTT测定) 和免疫球蛋白的产生 (ELISA).
  • 使用免疫阻塞方法比较DNAJA3和OXPHOS蛋白质复合体.

主要成果:

  • DNAJA3 缺乏导致了骨髓和免疫器官中 B220+ 细胞的减少和 B220+ 细胞的减少.
  • 在B1 (B1b) 和B2 B细胞亚群中观察到显著的减少.
  • 在DNAJA3淘汰赛小鼠中,B细胞芽细胞生成活性和免疫球蛋白的产生减少.
  • DNAJA3 缺乏导致功能障碍的线粒体增加,线粒体质量减少,膜潜力减少,线粒体呼吸复合蛋白减少.

结论:

  • DNAJA3在B细胞的发育和成熟中起着重要作用.
  • 缺少DNAJA3会对B细胞免疫功能产生负面影响,包括产生抗体.
  • 线粒体功能障碍是DNAJA3损失对B细胞的影响的关键机制.