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Related Concept Videos

Necrosis01:16

Necrosis

Necrosis is considered as an “accidental” or unexpected form of cell death that ends in cell lysis. The first noticeable mention of “necrosis” was in 1859 when Rudolf Virchow used this term to describe advanced tissue breakdown in his compilation titled “Cell Pathology”.
Morphological Manifestations of Necrosis
Necrotic cells show different types of morphological appearance depending on the type of tissue and infection. In coagulative necrosis, cells become anucleated and die, but their...
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...
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.
Apoptosis01:30

Apoptosis

Apoptosis is a combination of two Greek words, 'apo' and 'ptosis,' meaning separation and falling off, respectively. Hippocrates used this word to describe gangrene, which was caused due to bandaging of fractured bones. Apoptosis was distinguished from necrosis in 1970 when John Kerr reported observations of morphological changes occurring during apoptosis. During one experiment, he observed that the disruption of blood supply to the liver tissue resulted in a size reduction of the tissue.
The Intrinsic Apoptotic Pathway01:31

The Intrinsic Apoptotic Pathway

Internal cellular stress, such as cellular injury or hypoxia, triggers intrinsic apoptosis. The B-cell lymphoma 2 (Bcl-2) family of proteins are the primary regulators of the intrinsic apoptotic pathway. For example, during DNA damage, checkpoint proteins, such as Ataxia Telangiectasia Mutated (ATM protein) and Checkpoints Factor-2 (Chk2) proteins, are activated. These proteins phosphorylate p53 which further activates pro-apoptotic proteins, such as Bax, Bak, PUMA, and Noxa, and inhibits...
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...

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Related Experiment Video

Updated: Jun 5, 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

Neutrophil apoptosis and hypoxia.

L Dyugovskaya1, A Polyakov

  • 1Technion-Israel Institute of technology, Haifa, Israel. larissa@tx.technion.ac.il

Fiziolohichnyi Zhurnal (Kiev, Ukraine : 1994)
|January 26, 2011
PubMed
Summary

Neutrophil apoptosis is crucial for resolving inflammation but is complex. Hypoxia significantly influences neutrophil survival and death pathways, impacting immune responses and tissue homeostasis.

Area of Science:

  • Immunology
  • Cell Biology
  • Molecular Biology

Background:

  • Neutrophils are key immune cells combating pathogens but can cause tissue damage.
  • Neutrophil apoptosis is vital for maintaining homeostasis and resolving inflammation.
  • Extracellular factors like hypoxia modulate neutrophil survival and death signaling.

Purpose of the Study:

  • To review mechanisms of neutrophil death and survival.
  • To focus on neutrophil apoptosis under hypoxic conditions.
  • To discuss the roles of signaling pathways and reactive oxygen species.

Main Methods:

  • Review of recent studies on neutrophil apoptosis.
  • Analysis of intracellular apoptotic/survival signaling pathways.
  • Examination of extracellular stimuli, particularly hypoxia.

More Related Videos

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

LPS and ATP-induced Death of PMA-differentiated THP-1 Macrophages and its Validation
06:12

LPS and ATP-induced Death of PMA-differentiated THP-1 Macrophages and its Validation

Published on: May 3, 2024

Related Experiment Videos

Last Updated: Jun 5, 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

LPS and ATP-induced Death of PMA-differentiated THP-1 Macrophages and its Validation
06:12

LPS and ATP-induced Death of PMA-differentiated THP-1 Macrophages and its Validation

Published on: May 3, 2024

Main Results:

  • Neutrophils utilize both extrinsic and intrinsic apoptotic pathways with unique features.
  • Key regulators include death receptors, caspases, mitochondria, Bcl-2 proteins, NF-kappaB, and p38MAPK.
  • The role of reactive oxygen species (ROS) in neutrophil apoptosis is complex and context-dependent.

Conclusions:

  • Hypoxia activates multiple signaling pathways influencing neutrophil fate.
  • Sustained versus intermittent hypoxia may have differential effects on neutrophils.
  • Understanding these mechanisms is critical for managing inflammatory conditions.