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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...
Cellular Injury IV: Necrosis01:16

Cellular Injury IV: Necrosis

Necrosis is a form of irreversible cell death caused by severe injury such as ischemia, toxins, or trauma. Unlike programmed cell death, it is an uncontrolled, pathological process that typically provokes inflammation in surrounding tissues.Pathophysiologic ChangesNecrosis begins when cells sustain critical damage, leading to swelling of organelles, particularly mitochondria, and rapid ATP depletion. As energy levels decline, membrane ion pumps fail, leading to calcium influx and eventually,...
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...
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...
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...
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.

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Related Experiment Video

Updated: May 26, 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

Necroptosis turns TNF lethal.

Lorenzo Galluzzi1, Guido Kroemer

  • 1INSERM, U848, Villejuif, F-94805, France.

Immunity
|December 27, 2011
PubMed
Summary
This summary is machine-generated.

Necroptosis, a regulated necrosis pathway, is the primary cause of death from tumor necrosis factor in living organisms. This process is controlled by RIPK1 and RIPK3 kinases.

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Characterization of MLKL-mediated Plasma Membrane Rupture in Necroptosis
08:55

Characterization of MLKL-mediated Plasma Membrane Rupture in Necroptosis

Published on: August 7, 2018

Related Experiment Videos

Last Updated: May 26, 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

Characterization of MLKL-mediated Plasma Membrane Rupture in Necroptosis
08:55

Characterization of MLKL-mediated Plasma Membrane Rupture in Necroptosis

Published on: August 7, 2018

Area of Science:

  • Immunology
  • Cell Death Research
  • Molecular Biology

Background:

  • Tumor necrosis factor (TNF) plays a critical role in inflammation and immunity.
  • Regulated necrosis, including necroptosis, represents a programmed cell death pathway distinct from apoptosis.
  • The molecular mechanisms driving TNF-induced lethality in vivo were not fully elucidated.

Discussion:

  • This study identifies necroptosis as the key mediator of TNF-induced lethality.
  • The kinases RIPK1 and RIPK3 are essential for initiating the necroptosis pathway.
  • Understanding necroptosis is crucial for comprehending TNF signaling and its in vivo consequences.

Key Insights:

  • Necroptosis, a form of programmed necrosis, is directly responsible for the lethal effects of TNF in vivo.
  • The kinases RIPK1 and RIPK3 are central regulators of this necroptotic cell death pathway.
  • This finding clarifies the mechanism behind TNF-mediated organismal death.

Outlook:

  • Further research into necroptosis inhibitors could offer therapeutic strategies for inflammatory diseases.
  • Targeting RIPK1 and RIPK3 may provide novel approaches to control TNF-driven pathologies.
  • This work opens new avenues for exploring the role of regulated necrosis in physiology and disease.