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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.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
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Autoimmune Disorders01:29

Autoimmune Disorders

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Autoimmune diseases are a group of disorders in which the body's immune system mistakenly attacks its own cells, tissues, and organs. This results from an overactive immune response against substances and tissues normally present in the body. Let's delve into the concept and mechanism of autoimmune diseases from an immune system point of view, explore different causes and examples of such diseases, and discuss potential solutions.
Concept and Mechanism of Autoimmune Diseases
The immune...
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Diversity of Antigen Receptors01:28

Diversity of Antigen Receptors

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Antigen receptors are essential components of the immune system crucial in defending the body against foreign invaders. These receptors are present on the surface of B and T cells, enabling them to recognize antigens and mount an appropriate immune response.
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
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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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Investigating Target Gene Function in a CD40 Agonistic Antibody-induced Colitis Model using CRISPR/Cas9-based Technologies
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UNC93B1变种是TLR7依赖的自身免疫的基础.

Christine Wolf1, Ee Lyn Lim2, Mohammad Mokhtari3

  • 1Department of Pediatrics, Medizinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Dresden 01307, Germany.

Science immunology
|January 11, 2024
PubMed
概括

在UNC93B1中的遗传变异破坏了Toll-like受体7 (TLR7) 调节,导致自身免疫性疾病. 这项研究突出了UNC93B1的重点.

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科学领域:

  • 免疫学 免疫学 免疫学
  • 遗传学 遗传学 是一个
  • 类风湿病学 类风湿病学

背景情况:

  • 核酸感应的Toll-like受体 (TLRs) 对抗病毒免疫非常重要.
  • 失调的TLR7信号,特别是来自自核酸的信号,与系统性红斑狼 (SLE) 有关.
  • UNC93B1蛋白对于TLRs3,7,8和9的正常功能至关重要.

研究的目的:

  • 调查UNC93B1变种在SLE早期发病中的作用.
  • 了解UNC93B1变种对TLR信号的功能影响.
  • 探索UNC93B1和TLR7介导的自身免疫之间的联系.

主要方法:

  • 在SLE患者中识别和特征UNC93B1变体 (E92G和R336L).
  • 在用TLR激动剂刺激的患者衍生细胞和小鼠巨细胞中评估了细胞因子 (TNF-α,IL-6) 的产生.
  • 研究了E92G变异对UNC93B1蛋白稳定性和与TLR7.7相互作用的影响.
  • 分析了I型干扰素 (IFN) 信号通路.

主要成果:

  • 四名患有早期发病的SLE患者携带UNC93B1变种E92G或R336L.
  • 具有UNC93B1变异的细胞在TLR7/8刺激时表现出高TNF-α和IL-6的产生.
  • 这种E92G变种导致了UNC93B1蛋白质的不稳定性,并影响了TLR7的相互作用.
  • 这导致了选择性的TLR7过度激活和构成型I型IFN信号.

结论:

  • UNC93B1变种可以导致选择性TLR7过活化,从而导致SLE的发病.
  • UNC93B1在调节TLR亚型特异性反应方面发挥着关键作用.
  • 针对TLR7为UNC93B1相关的自身免疫性疾病 (如SLE) 提供了潜在的治疗策略.