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相关概念视频

Antigens Involved in Adaptive Immunity01:26

Antigens Involved in Adaptive Immunity

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An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
Complete Antigens
Complete antigens possess both immunogenicity and...
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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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Immune Response Against Viral Pathogens01:29

Immune Response Against Viral Pathogens

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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...
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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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Overview
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Antigen Processing Pathways01:31

Antigen Processing Pathways

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MHC molecules are key players in the immune response, enabling T cells to recognize and respond to specific antigens. They are present on the surface of all nucleated cells in the body and are instrumental in presenting antigens to T cells and activating them. T cells recognize the MHC-antigen complex and initiate an immune response. MHC class I and MHC class II are two main types of MHC molecules, each associated with a distinct antigen processing pathway.
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相关实验视频

Updated: Jul 19, 2025

Qualitative and Quantitative Analysis of the Immune Synapse in the Human System Using Imaging Flow Cytometry
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形态学决定了免疫激活与框架核酸的免疫激活.

Yao Hu1, Zhongxu Luo1, Zhilei Ge2

  • 1Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou, 511443, China.

Small (Weinheim an der Bergstrasse, Germany)
|August 9, 2023
PubMed
概括

框架核酸 (FNA) 根据其形状和度影响免疫激活. 在FNA上酸-酸-酸寡氧核酸 (CpG ODNs) 的最佳空间排列增强了免疫反应.

关键词:
在 CpG 的 ODNs 中.框架 核酸 核酸的框架免疫激活系统的激活形态学 形态学 形态学

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科学领域:

  • 生物医学工程 生物医学工程
  • 免疫学 免疫学 免疫学
  • 纳米技术纳米技术

背景情况:

  • 框架核酸 (FNA) 是可编程的DNA结构,用于生物分子的传递.
  • FNA形态,度和CpG ODN呈现对免疫激活的影响尚未完全理解.

研究的目的:

  • 调查FNA形状,大小,度以及CpG ODN空间布局如何影响免疫反应.
  • 探索FNA在设计有针对性的免疫激活策略中的潜力.

主要方法:

  • 合成具有多种形态的FNAs.
  • 在不同度 (50nM和高度) 中评估FNA免疫反应.
  • 通过不同的FNA形状 (纳米链,四面体) 触发的细胞吸收和免疫激活的分析.
  • 研究CpG ODN间距 (7-8 nm) 以及其对免疫刺激的影响.

主要成果:

  • 低度的FNA (50nM) 没有显示免疫刺激.
  • 高度的延长FNAs (纳米链,四面体) 诱导显著的免疫激活.
  • 免疫反应与FNA大小,度和细胞吸收相关.
  • 在FNA上,最佳的CpG ODN间距为7-8nm,最大限度地提高了免疫刺激.

结论:

  • FNA的先天免疫反应取决于其度和形态.
  • 可以使用FNA形态来编程CpG ODN介导的免疫激活.
  • FNA提供了一个可设计的平台,用于研究依赖形态的生物反应和开发新的免疫载体.