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Related Concept Videos

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

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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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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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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.
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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.
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Special Features of Adaptive Immunity01:20

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The adaptive immune system, a crucial component of the overall immune response, offers a highly specialized defense against pathogens. It involves specific cell types and features, enabling it to combat infections effectively and efficiently.
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Mouse Na&#239;ve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets
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A Single-Cell Perspective on Memory T-Cell Differentiation.

Lorenz Kretschmer1, Dirk H Busch1,2, Veit R Buchholz1

  • 1Institute for Medical Microbiology, Immunology and Hygiene, Technical University of Munich (TUM), Munich 81675 , Germany.

Cold Spring Harbor Perspectives in Biology
|April 27, 2021
PubMed
Summary
This summary is machine-generated.

Understanding T-cell memory differentiation requires studying individual cells. Early segregation into distinct T-cell populations dictates whether T cells become long-lived or short-lived after infection or vaccination.

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Area of Science:

  • Immunology
  • Cell Biology
  • Molecular Biology

Background:

  • Extensive research has identified molecular players and transcriptional networks in CD4 and CD8 T-cell memory differentiation at the population level.
  • Translating these population-level regulatory principles to the behavior of single antigen-specific T cells is an emerging area of research.

Purpose of the Study:

  • To summarize approaches for tracking individual T-cell fates and their progeny in vivo.
  • To highlight key questions in memory T-cell differentiation addressed by studying single-cell-derived T-cell families.
  • To discuss the influence of T-cell receptor (TCR) affinity and coregulation of differentiation/proliferation on T-cell fate decisions.

Main Methods:

  • In vivo tracking of individual T cells and their progeny.
  • Analysis of T-cell families derived from single cells during infection or vaccination models.
  • Investigating the role of TCR affinity and cell division rates in T-cell differentiation.

Main Results:

  • Single-cell studies are elucidating how population-level T-cell memory differentiation principles apply to individual cells.
  • T-cell fate decisions are modulated by TCR affinity.
  • A coregulation of T-cell differentiation and proliferation shapes T-cell development.

Conclusions:

  • Early segregation into distinct T-cell populations, specifically slowly dividing T central memory precursors (CMPs) and rapidly dividing non-CMPs, is a critical event.
  • This segregation separates the developmental pathways for long-lived and short-lived T cells, providing a key insight into T-cell memory formation.