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Related Concept Videos

Phagocytosis of Apoptotic Cells01:17

Phagocytosis of Apoptotic Cells

Cells undergoing apoptosis form apoptotic bodies that must be removed immediately to prevent inflammation, autoimmune diseases, and necrosis. Phagocytosis is carried out by professional phagocytes such as macrophages or  immature dendritic cells. Non-professional phagocytes such as  epithelial cells and fibroblasts also take part in this process; however, they are not as effective as professional phagocytes. 
Normal cells contain receptors that prevent them from being recognized by phagocytes.
The Extrinsic Apoptotic Pathway01:17

The Extrinsic Apoptotic Pathway

The extrinsic apoptotic pathway is initiated when extracellular death-inducing signals, such as specific cytokines, activate the death receptors expressed on the cell surface. The immune cells involved in this pathway are natural killer cells (NK cells) and cytotoxic T-lymphocytes. NK cells are critical in innate immune response, while cytotoxic T-lymphocytes are associated with adaptive immune response. These cells recognize specific receptors expressed on the altered cells and activate...
Overview of Cell Death01:30

Overview of Cell Death

Cell death is an essential process where the body gets rid of old or damaged cells. Cell proliferation and death need to be balanced, as an imbalance between the two may lead to cancer or autoimmune diseases.
Cell death was observed in the early 19th century, but there was no experimental evidence to prove it. In 1842, Carl Vogt first discovered cell death in a metamorphic toad; however, it was not termed ‘cell death.’ Scientists discovered different cell death pathways only in the 20th century...
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...
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...
Autophagic Cell Death01:18

Autophagic Cell Death

Christian de Duve discovered “autophagy,” a process in which cellular components are engulfed by membrane-bound organelles called autophagosomes. The autophagosomes then fuse with lysosomes to digest the enclosed contents. Autophagy is generally activated in cells to prevent cell death. However, cell death is triggered when the damage is beyond repair.
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and pro-apoptotic...

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Related Experiment Video

Updated: Jun 16, 2026

Neutrophil Lifespan Extension with CLON-G and an In Vitro Spontaneous Death Assay
05:52

Neutrophil Lifespan Extension with CLON-G and an In Vitro Spontaneous Death Assay

Published on: May 12, 2023

Cytokines modulate neutrophil death.

Carole Elbim1, Jérôme Estaquier

  • 1Centre de Recherche des Cordeliers, Université Pierre et Marie Curie-Paris 6, UMR S 872, Paris, France. carole.elbim@crc.jussieu.fr

European Cytokine Network
|February 12, 2010
PubMed
Summary

Cytokines can prolong the life of polymorphonuclear neutrophils (PMN), which is crucial for fighting infections. This review examines how cytokines affect PMN apoptosis in health and disease.

Area of Science:

  • Immunology
  • Cell Biology

Background:

  • Polymorphonuclear neutrophils (PMN) are essential immune cells with a short lifespan in circulation.
  • Their survival in tissues is critical for effective pathogen clearance.

Purpose of the Study:

  • To review the impact of cytokines on polymorphonuclear neutrophil (PMN) apoptosis.
  • To explore pathological conditions linked to dysregulated PMN apoptosis due to cytokine imbalances.

Main Methods:

  • Literature review of studies on cytokine-mediated effects on PMN apoptosis.
  • Analysis of clinical examples involving aberrant cytokine production and PMN apoptosis.

Main Results:

  • Cytokines significantly influence the rate of PMN apoptosis.
  • Dysregulation of PMN apoptosis is observed in pathological states with abnormal cytokine profiles.

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Identification of Intracellular Signaling Events Induced in Viable Cells by Interaction with Neighboring Cells Undergoing Apoptotic Cell Death
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Identification of Intracellular Signaling Events Induced in Viable Cells by Interaction with Neighboring Cells Undergoing Apoptotic Cell Death

Published on: December 27, 2016

Development and Identification of a Novel Subpopulation of Human Neutrophil-derived Giant Phagocytes In Vitro
10:05

Development and Identification of a Novel Subpopulation of Human Neutrophil-derived Giant Phagocytes In Vitro

Published on: January 25, 2017

Related Experiment Videos

Last Updated: Jun 16, 2026

Neutrophil Lifespan Extension with CLON-G and an In Vitro Spontaneous Death Assay
05:52

Neutrophil Lifespan Extension with CLON-G and an In Vitro Spontaneous Death Assay

Published on: May 12, 2023

Identification of Intracellular Signaling Events Induced in Viable Cells by Interaction with Neighboring Cells Undergoing Apoptotic Cell Death
09:18

Identification of Intracellular Signaling Events Induced in Viable Cells by Interaction with Neighboring Cells Undergoing Apoptotic Cell Death

Published on: December 27, 2016

Development and Identification of a Novel Subpopulation of Human Neutrophil-derived Giant Phagocytes In Vitro
10:05

Development and Identification of a Novel Subpopulation of Human Neutrophil-derived Giant Phagocytes In Vitro

Published on: January 25, 2017

Conclusions:

  • Cytokine signaling is a key regulator of PMN lifespan.
  • Understanding these mechanisms is vital for addressing immune dysfunctions and infections.