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Related Concept Videos

Necrosis01:16

Necrosis

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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”.
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Overview of Cell Death01:30

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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.
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Cellular Injury IV: Necrosis01:16

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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,...
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Autophagic Cell Death01:18

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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.
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Cellular Injury IlI: Cellular Death01:11

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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...
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Apoptosis01:30

Apoptosis

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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...
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Author Spotlight: THP-1 Macrophage Response to LPS/ATP — Unveiling the Pyroptosis, Apoptosis, and Necroptosis Spectrum
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Programmed cell death with a necrotic-like phenotype.

Michael J Morgan, Zheng-Gang Liu

    Biomolecular Concepts
    |December 2, 2014
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    Summary
    This summary is machine-generated.

    Programmed cell death, including less-studied necrotic forms, is crucial for organism health and development. Recent research clarifies regulated necrosis, identifying it as a key therapeutic target for diseases.

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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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    Area of Science:

    • Cell Biology
    • Physiology
    • Molecular Biology

    Background:

    • Programmed cell death is vital for multicellular organisms, supporting development, homeostasis, and immunity.
    • Apoptosis is well-understood, but programmed necrosis, a cell death with a necrotic phenotype, is less studied.
    • Programmed necrosis was initially considered an in vitro artifact but is now recognized as physiologically relevant.

    Purpose of the Study:

    • To elucidate the mechanisms of programmed necrosis.
    • To highlight the physiological importance of regulated necrosis in vivo.
    • To identify programmed necrosis as a therapeutic target.

    Main Methods:

    • Review of in vitro and in vivo studies on programmed cell death.
    • Characterization of molecular pathways involved in regulated necrosis.
    • Investigation of the RIP1-RIP3-dependent necrosome complex and related pathways.

    Main Results:

    • Regulated necrosis is an authentic cell death classification important in mammalian physiology.
    • Programmed necrosis is a significant therapeutic target in pathological processes.
    • The RIP1-RIP3 necrosome complex is essential for many programmed necrosis instances.

    Conclusions:

    • Programmed necrosis is a crucial, albeit less understood, form of cell death with significant physiological roles.
    • Understanding the interconnectedness of necrotic pathways is a current challenge.
    • Targeting programmed necrosis offers therapeutic potential for various diseases.