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Related Concept Videos

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...
T Cell Types and Functions01:24

T Cell Types and Functions

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...
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...
Cytotoxic T Cells-mediated Immune Response01:27

Cytotoxic T Cells-mediated Immune Response

Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
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...
Differentiation of Common Myeloid Progenitor Cells01:15

Differentiation of Common Myeloid Progenitor Cells

Common myeloid progenitors (CMPs) are oligopotent cells that can differentiate into granulocytes and macrophages. Granulocytes and macrophages are essential for protecting the body against bacterial, viral, or fungal infections. They migrate from the bone marrow into the circulating blood to reach specific tissue sites where they differentiate and help in immune surveillance. However, they survive only for a few days and must be continuously made available to the organism to maintain a robust...

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Related Experiment Video

Updated: Jun 28, 2026

Mouse Na&#239;ve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets
07:12

Mouse Naïve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets

Published on: April 16, 2015

Functionally distinct NK-cell subsets: developmental origins and biological implications.

James P Di Santo1

  • 1Immunology Department, Institut Pasteur, Paris, France. disanto@pasteur.fr

European Journal of Immunology
|November 4, 2008
PubMed
Summary

Natural killer (NK) cells have diverse roles beyond direct cell killing. Recent findings reveal specialized NK cell subsets with distinct functions, highlighting their evolving understanding in host defense.

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Last Updated: Jun 28, 2026

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07:12

Mouse Naïve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets

Published on: April 16, 2015

An Efficient and High Yield Method for Isolation of Mouse Dendritic Cell Subsets
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Area of Science:

  • Immunology
  • Cell Biology

Background:

  • Natural Killer (NK) cells were first identified for their cytotoxic functions against target cells.
  • Later research revealed NK cells' crucial role in host defense through cytokine production, such as interferon-gamma (IFN-γ) and tumor necrosis factor-alpha (TNF-α).

Purpose of the Study:

  • To explore the developmental origins of specialized NK cell subsets.
  • To discuss the biological implications of NK cell functional diversification.

Main Methods:

  • Review of existing literature on NK cell biology.
  • Analysis of studies describing specialized NK cell subsets in mice and humans.

Main Results:

  • NK cells exhibit diverse effector functions beyond cytotoxicity.
  • Specialized NK cell subsets with biased functions have been identified in both mice and humans.

Conclusions:

  • NK cell diversification represents a significant advancement in understanding immune responses.
  • Further research into NK cell subsets is crucial for understanding host defense mechanisms.