Related Experiment Video

Updated: Jul 16, 2026

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

[Apoptosis and necrosis--two different ways leading to the same target]

Krzysztof J Helewski1, Grazyna I Kowalczyk-Ziomek, Janusz Konecki

  • 1Z I Katedry i Zakładu Histologii i Embriologii w Zabrzu Slaskiej Akademii Medycznej w Katowicach.

Wiadomosci Lekarskie (Warsaw, Poland : 1960)
|March 7, 2007
PubMed

Insights

Apoptosis and necrosis are distinct cell death pathways with different mechanisms and outcomes. Mitochondria play a key role in determining whether cells undergo programmed cell death (apoptosis) or passive necrosis, influenced by ATP levels and caspase activation.

Area of Science:

  • Cell Biology
  • Biochemistry
  • Molecular Biology

Context:

  • Cell death is a fundamental biological process.
  • Apoptosis (programmed cell death) and necrosis (passive cell death) are two primary mechanisms.
  • These pathways are triggered by similar factors but differ significantly in their execution.

Purpose:

  • To elucidate the distinct mechanisms and biochemical differences between apoptosis and necrosis.
  • To highlight the role of intracellular ATP levels and caspase activation in determining cell death fate.
  • To emphasize the critical function of mitochondria in regulating cell death pathways.

Summary:

  • Apoptosis is an active, gene-controlled process requiring ATP, characterized by intact cell membranes and no inflammatory response.
  • Necrosis is a passive process involving loss of metabolic function and enzyme activity, leading to cellular component release and inflammation.
  • Mitochondria are central to cell death determination, with ATP levels and caspase activation being key factors, alongside ion channel disturbances and free radicals.

Impact:

  • Understanding these distinct cell death mechanisms is crucial for comprehending various physiological and pathological conditions.
  • This knowledge can inform the development of targeted therapeutic strategies for diseases involving aberrant cell death.
  • Identifies mitochondria as critical regulators, opening avenues for research into mitochondrial-targeted interventions.

More Related Videos

Identification of Intracellular Signaling Events Induced in Viable Cells by Interaction with Neighboring Cells Undergoing Apoptotic Cell Death09:18

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

Published on: December 27, 2016

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...
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...
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.
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...
Cellular Injury IlI: Cellular Death01:11

Cellular Injury IlI: Cellular Death

Cell death is the irreversible loss of cellular structure and function, representing the final stage of severe injury. It plays a key role in both normal physiology and disease.Types of Cell DeathThe two main types are necrosis and apoptosis, though others like necroptosis and pyroptosis also exist.Necrosis:Necrosis is an unregulated form of cell death caused by severe injury such as trauma, toxins, or ischemia. It is characterized by cell swelling, membrane loss, rupture, and leakage of...
Cellular Injury V: Apoptosis and Autophagy01:22

Cellular Injury V: Apoptosis and Autophagy

Cells respond to damage and stress through highly coordinated processes that decide whether they survive or undergo controlled self-destruction. Two major pathways involved in this regulation are apoptosis, a type of programmed cell death, and autophagy, a survival mechanism that helps cells adapt to adverse conditions.ApoptosisApoptosis removes aged or injured cells to maintain tissue balance. During this process, the cell shrinks, chromatin condenses and fragments, and membrane-bound...