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相关概念视频

T Cell Activation and Clonal Selection01:22

T Cell Activation and Clonal Selection

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...
Cells of the Adaptive Immune Response01:23

Cells of the Adaptive Immune Response

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...
B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

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...
Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

Overview
Immune Response Against Viral Pathogens01:29

Immune Response Against Viral Pathogens

The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
Regulation of Hematopoietic Stem Cells01:01

Regulation of Hematopoietic Stem Cells

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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相关实验视频

Updated: Jun 2, 2026

Accessing Early Differentiation of Virus-Specific Follicular Helper CD4+ T Cell in Acute LCMV-Infected Mice
05:03

Accessing Early Differentiation of Virus-Specific Follicular Helper CD4+ T Cell in Acute LCMV-Infected Mice

Published on: April 26, 2024

通过CLV3p-FLS2信号传递触发干细胞的免疫.

Horim Lee1, Ok-Kyong Chah, Jen Sheen

  • 1Department of Molecular Biology and Center for Computational and Integrative Biology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA.

Nature
|April 19, 2011
PubMed
概括
此摘要是机器生成的。

发芽垂干细胞 (SAM) 中的植物干细胞具有天生的免疫力. 克拉瓦塔3 (CLV3p) 通过FLS2激活病原体耐药性,揭示了植物发育和防御中的双重作用.

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Generation of Multivirus-specific T Cells to Prevent/treat Viral Infections after Allogeneic Hematopoietic Stem Cell Transplant
08:52

Generation of Multivirus-specific T Cells to Prevent/treat Viral Infections after Allogeneic Hematopoietic Stem Cell Transplant

Published on: May 27, 2011

Expanding Cytotoxic T Lymphocytes from Umbilical Cord Blood that Target Cytomegalovirus, Epstein-Barr Virus, and Adenovirus
11:18

Expanding Cytotoxic T Lymphocytes from Umbilical Cord Blood that Target Cytomegalovirus, Epstein-Barr Virus, and Adenovirus

Published on: May 7, 2012

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08:52

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Published on: May 27, 2011

Expanding Cytotoxic T Lymphocytes from Umbilical Cord Blood that Target Cytomegalovirus, Epstein-Barr Virus, and Adenovirus
11:18

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科学领域:

  • 植物生物学 植物生物学
  • 分子遗传学 分子遗传学
  • 免疫学 免疫学 免疫学

背景情况:

  • 射击角髓系统 (SAM) 干细胞再生植物器官.
  • SAM免疫对于无疾病的植物再生至关重要,但人们对其了解甚少.
  • 克拉瓦塔3 (CLV3p) 调节SAM干细胞的稳态.

研究的目的:

  • 调查SAM免疫力背后的分子机制.
  • 确定CLV3p是否在植物防御中发挥作用.
  • 探索CLV3p与已知的免疫通路之间的相互作用.

主要方法:

  • 阿拉比多普西斯塔利亚纳模型系统.
  • 对CLV3p信号通路的分析.
  • 研究了FLS2受体激酶的参与.
  • 研究了CLV1和CLV2受体通路.

主要成果:

  • 通过FLS2.2,CLV3p触发了免疫信号和病原体抗性.
  • CLV3p-FLS2信号是独立于CLV1/CLV2干细胞通路的.
  • 这种信号与FLS2介导的生长抑制脱.
  • 在SAM中,FLS2感知到内生CLV3p,挑战自我/非自我歧视.

结论:

  • 在植物发育和免疫力方面,CLV3p具有双重作用.
  • 植物和受体激酶信号共进为发展和防御.
  • 增强的SAM免疫力可能是保持植物不朽的策略.