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Immunological Memory01:23

Immunological Memory

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Immunological memory, a pivotal pillar of the adaptive immune system, is responsible for the body's ability to remember and respond more swiftly and effectively to previously encountered pathogens. This remarkable feature is what makes vaccines so effective in preventing diseases.
What is Immunological Memory?
Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature...
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Cells of the Adaptive Immune Response01:23

Cells of the Adaptive Immune Response

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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 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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Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

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Updated: Jun 23, 2025

Isolation of Group 2 Innate Lymphoid Cells from Mouse Nasal Mucosa to Detect the Expression of CD226
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人类CD127阴性ILC2s显示免疫学记忆.

Laura Mathä1,2, Lisette Krabbendam3,4, Sergio Martinez Høyer1

  • 1Microbiology, Tumor and Cell Biology, Karolinska Institute , Stockholm, Sweden.

The Journal of experimental medicine
|June 18, 2024
PubMed
概括

人类先天性淋巴细胞2型 (ILC2s) 可以发展免疫记忆,类似于小鼠. 活化的人类ILC2s持续存在,显示CD127表达减少和增强的反应,表明需要修订ILC2识别策略.

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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

背景情况:

  • 2型先天性淋巴细胞 (ILC2s) 对于2型免疫和组织平衡至关重要.
  • ILC2s与2型炎症相关的疾病,如喘有关.
  • 人类ILC2s中免疫记忆的存在仍未得到证实,与小鼠不同.

研究的目的:

  • 为了调查人类ILC2s是否可以获得免疫记忆.
  • 为了识别类似记忆的人类ILC2s的标记和特征.
  • 为了评估这些假定存储器的功能能力,ILC2s.

主要方法:

  • 在休息状态下对人类ILC2s活化后的CD45RO和CD127表达的分析.
  • 对CD127-CD45RO+ ILC2s进行隔离和体外刺激.
  • 对CD127-CD45RO+ ILC2s的基因表达概况.
  • 与鼠标内存ILC2特性进行比较.

主要成果:

  • 持续的CD45RO表达和减少的CD127表达在先前激活的休息人类ILC2s中观察到.
  • 隔离的CD127-CD45RO+ ILC2s在刺激时表现出增强的增殖和细胞因子生产.
  • 这些类似记忆的ILC2s在健康和炎症组织中被发现,并显示出激活的基因特征.
  • 在小鼠的ILC2s记忆中也注意到CD127表达的减少.

结论:

  • 人类ILC2s具有获得天生的免疫记忆的能力.
  • CD127-CD45RO+表型代表了人类记忆的潜在标记物ILC2s.
  • 这些发现需要重新评估目前用于识别人类ILC2s的方法.