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相关概念视频

T Cell Types and Functions01:24

T Cell Types and Functions

756
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...
756
Regulation of Hematopoietic Stem Cells01:01

Regulation of Hematopoietic Stem Cells

3.1K
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...
3.1K
Cells of the Adaptive Immune Response01:23

Cells of the Adaptive Immune Response

762
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...
762
Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

66.6K
Overview
66.6K
Cells of the Innate Immune Response01:28

Cells of the Innate Immune Response

1.2K
The innate immune response is an immediate and non-specific response against pathogens, acting swiftly to prevent the spread of infections. The primary cells involved in this response are phagocytes and natural killer (NK) cells.
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
1.2K
B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

1.4K
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...
1.4K

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相关实验视频

Updated: May 23, 2025

Isolation of Murine Lymph Node Stromal Cells
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动态STING抑制调节免疫细胞的发育和功能.

Kennady Knox1, Devon Jeltema1, Nicole Dobbs1

  • 1Department of Immunology, University of Texas Southwestern Medical Center, Dallas, TX, USA.

Science immunology
|March 7, 2025
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概括
此摘要是机器生成的。

调节STING (干扰素基因刺激器) 对于免疫细胞发育至关重要. 控制的STING表达可以预防炎症性疾病和T细胞功能障碍,突出其在免疫和癌症中的重要性.

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Adenoviral Transduction of Naive CD4 T Cells to Study Treg Differentiation
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Retroviral Transduction of Helper T Cells as a Genetic Approach to Study Mechanisms Controlling their Differentiation and Function
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Last Updated: May 23, 2025

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Adenoviral Transduction of Naive CD4 T Cells to Study Treg Differentiation
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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
  • 癌症研究 癌症研究

背景情况:

  • 干扰素基因刺激器 (STING) 是一个关键的先天免疫传感器,但其正常表达和调节仍然不清楚.
  • 了解STING调节对于免疫细胞的发育和功能至关重要.

研究的目的:

  • 研究免疫细胞中STING的恒常表达模式和调节机制.
  • 确定STING失调对免疫细胞发育,功能和疾病的影响.

主要方法:

  • 使用了Sting1报告员和有条件的Sting1转基因小鼠模型.
  • 分析了T淋巴细胞发育期间和瘤微环境中的STING表达.
  • 研究了涉及DNA甲基转移酶1的表观遗传沉默机制.

主要成果:

  • 中性粒细胞中的表达被抑制;强迫表达导致全身炎症.
  • 在T细胞发育过程中发生了STING的表观遗传沉默,影响了血统承诺.
  • 瘤中的CD8+T细胞抑制STING,与小鼠和人类结直肠癌中的T细胞耗尽相关.

结论:

  • 控制的,而不是无处不在的,STING表达对于免疫平衡至关重要.
  • 刺激失调有助于炎症疾病和受损的适应性免疫力.
  • 瘤微环境中的STING调节代表了STING病理生物学和T细胞枯竭的新方面.