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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...
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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,...
Yeast Signaling01:28

Yeast Signaling

Yeasts are single-celled organisms, but unlike bacteria, they are eukaryotes (cells with a nucleus). Cell signaling in yeast is similar to signaling in other eukaryotic cells. A ligand, such as a protein or a small molecule released from a yeast cell, attaches to a receptor on the cell surface. The binding stimulates second-messenger kinases to activate or inactivate transcription factors that further regulate gene expression. Many of the yeast intracellular signaling cascades have similar...
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Overview of Cell Death

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Necrosis in yeast.

Tobias Eisenberg1, Didac Carmona-Gutierrez, Sabrina Büttner

  • 1Institute of Molecular Biosciences, University of Graz, Austria.

Apoptosis : an International Journal on Programmed Cell Death
|March 19, 2010
PubMed
Summary
This summary is machine-generated.

Necrosis, once thought accidental, is a regulated cell death process in yeast. This program involves mitochondria, pH, and polyamines, influencing aging and cell survival.

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Aging Research

Background:

  • Necrosis was traditionally viewed as an uncontrolled cell death due to injury.
  • Recent discoveries indicate genetic regulation of necrosis, similar to apoptosis.
  • Yeast is emerging as a model to study the mechanisms of necrotic cell death.

Purpose of the Study:

  • To summarize current knowledge on factors regulating necrotic cell death in yeast.
  • To explore the potential physiological role of necrosis in cellular signaling and aging.

Main Methods:

  • Literature review and synthesis of existing research on yeast necrosis.
  • Analysis of genetic and environmental factors influencing necrotic pathways.

Main Results:

  • Mitochondria, low pH, and aging positively regulate yeast necrosis.
  • Cellular polyamines (e.g., spermidine), endonuclease G, vacuole, and peroxisomes inhibit necrosis.
  • Physiological necrosis may involve intercellular signaling to promote clone survival.

Conclusions:

  • Yeast possesses a regulated necrotic cell death program.
  • This program is influenced by various cellular components and environmental factors.
  • Physiological necrosis may play a role in longevity and aging processes.