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Related Concept Videos

Cells of the Innate Immune Response01:28

Cells of the Innate Immune Response

The innate immune response is an immediate and non-specific response against pathogens, acting swiftly to prevent the spread of infections. The primary cells involved in this response are phagocytes and natural killer (NK) cells.
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
Immune Surveillance by NK Cells and Phagocytes01:25

Immune Surveillance by NK Cells and Phagocytes

Immune surveillance is an integral part of the innate immune system, involving the continuous monitoring of peripheral tissues to detect and respond to pathogens, infected cells, or cancerous cells. This surveillance is conducted primarily by natural killer (NK) cells and phagocytes, which employ distinct but complementary mechanisms to identify and eliminate threats.
Natural Killer Cells: The Fast Responders
NK cells are large granular lymphocytes found in the blood and lymphatic system. These...
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...
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...
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...
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...

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Related Experiment Video

Updated: Jun 3, 2026

Measurement of Natural Killer Cell-Mediated Cytotoxicity and Migration in the Context of Hepatic Tumor Cells
06:55

Measurement of Natural Killer Cell-Mediated Cytotoxicity and Migration in the Context of Hepatic Tumor Cells

Published on: February 22, 2020

Monocytes control natural killer cell differentiation to effector phenotypes.

Katrina Soderquest1, Nick Powell, Carmelo Luci

  • 1Medical Research Council Centre for Transplantation, King's College London, London, UK.

Blood
|March 11, 2011
PubMed
Summary

Monocytes expressing Txb21 are crucial for terminal differentiation of natural killer (NK) cells, enabling them to target and reject tumors. This discovery clarifies NK cell development and antitumor immunity.

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

Published on: April 18, 2016

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Last Updated: Jun 3, 2026

Measurement of Natural Killer Cell-Mediated Cytotoxicity and Migration in the Context of Hepatic Tumor Cells
06:55

Measurement of Natural Killer Cell-Mediated Cytotoxicity and Migration in the Context of Hepatic Tumor Cells

Published on: February 22, 2020

An Efficient and High Yield Method for Isolation of Mouse Dendritic Cell Subsets
09:09

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

Published on: April 18, 2016

Area of Science:

  • Immunology
  • Cell Biology
  • Cancer Research

Background:

  • Natural killer (NK) cells are vital for cancer immune surveillance.
  • The specific roles of NK cell subsets and signals driving their maturation are not fully understood.

Purpose of the Study:

  • To investigate the role of Txb21 in NK cell differentiation and antitumor responses.
  • To identify the cellular and molecular mechanisms regulating NK cell terminal maturation.

Main Methods:

  • Utilized an in vivo model of tumor immunity.
  • Conducted phenotypical analysis of Txb21-deficient mice.
  • Performed adoptive transfer experiments and radiation bone marrow chimeras.
  • Employed in vivo myeloid cell depletion and in vitro coculture experiments.

Main Results:

  • CD11b(hi)CD27(low) NK cells are essential for rejecting MHC class I-negative tumors.
  • Txb21 deficiency arrests NK cell differentiation at the CD11b(hi)CD27(hi) stage, lacking terminally differentiated cells.
  • A Txb21(+/+) environment rescues NK cell maturation in Txb21(-/-) mice.
  • Spleen monocytes mediate NK cell terminal differentiation dependent on Txb21 and IL-15Rα.

Conclusions:

  • Txb21 expression in monocytes is critical for promoting NK cell development.
  • Monocyte-derived Txb21 facilitates the generation of effector NK cell subsets for antitumor immunity.
  • This study elucidates a novel mechanism in NK cell differentiation and its role in cancer immunity.