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- W2133669258 abstract "Necrosis has been defined as a type of cell death that lacks the features of apoptosis and autophagy, and is usually considered to be uncontrolled. Recent research suggests, however, that its occurrence and course might be tightly regulated. After signaling- or damage-induced lesions, necrosis can include signs of controlled processes such as mitochondrial dysfunction, enhanced generation of reactive oxygen species, ATP depletion, proteolysis by calpains and cathepsins, and early plasma membrane rupture. In addition, the inhibition of specific proteins involved in regulating apoptosis or autophagy can change the type of cell death to necrosis. Because necrosis is prominent in ischemia, trauma and possibly some forms of neurodegeneration, further biochemical comprehension and molecular definition of this process could have important clinical implications. Necrosis has been defined as a type of cell death that lacks the features of apoptosis and autophagy, and is usually considered to be uncontrolled. Recent research suggests, however, that its occurrence and course might be tightly regulated. After signaling- or damage-induced lesions, necrosis can include signs of controlled processes such as mitochondrial dysfunction, enhanced generation of reactive oxygen species, ATP depletion, proteolysis by calpains and cathepsins, and early plasma membrane rupture. In addition, the inhibition of specific proteins involved in regulating apoptosis or autophagy can change the type of cell death to necrosis. Because necrosis is prominent in ischemia, trauma and possibly some forms of neurodegeneration, further biochemical comprehension and molecular definition of this process could have important clinical implications. apoptosis-inducing factor, a flavoprotein normally located in the mitochondrial intermembrane space that can translocate to the nucleus on induction of cell death. Mitochondrial AIF participates in local redox homeostasis, whereas nuclear AIF can contribute to chromatin condensation and degradation. a survival kinase (also called protein kinase B or PKB) that, when activated, indirectly enhances glucose metabolism and suppresses autophagy through the mTOR kinase. a family of evolutionarily conserved genes, whose products are essential for different steps of the autophagic process. One of these genes encodes Atg6, which is also known as Beclin-1. the prototypic anti-apoptotic protein of the Bcl-2 family. The Bcl-2 protein is inserted in the outer mitochondrial membrane and protects mitochondria against MMP. the pro-apoptotic multidomain proteins of the Bcl-2 family. Bax and/or Bak are often required for the apoptosis-specific outer MMP. Whereas Bak is pre-inserted in the outer mitochondrial membrane, Bax has to translocate from the cytosol to mitochondria to mediate MMP. lysomal membrane permeabilization, a process leading to leakage of catabolic enzymes from the lysosomal lumen, is induced by ROS, sphingolipids and lysosomotropic agents. mitochondrial membrane permeabilization, a process affecting both mitochondrial membranes to a variable extent, leading to disruption of mitochondrial structure and function. Outer MMP leads to leakage of intermembrane proteins from mitochondria. Inner MMP is linked to bioenergetic failure caused by loss of the inner mitochondrial transmembrane potential. reactive oxygen species, a side product of normal oxidative phosphorylation that need to be scavenged by the anti-oxidant system of the cell. ROS can be overproduced during deleterious and pathological processes. a plasma membrane Na+/Ca2+ exchanger required for maintaining physiological low levels of Ca2+ in neurons. a process leading to the permeabilizaton of the inner mitochondrial membrane to solutes to up to 1500 Da, causing dissipation of the inner mitochondrial transmembrane potential, colloid osmotic swelling of the mitochondrial matrix and physical dysruption of the outer mitochondrial membrane. a specific kinase that is recruited to the death-inducing signaling complex after occupation of the TNF-R1, and that on activation can mediate various effects including the induction of necrosis. tumor-necrosis factor-α, an inflammatory cytokine that can cause cell death by acting on a specific cell-surface receptor." @default.
- W2133669258 created "2016-06-24" @default.
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- W2133669258 date "2007-01-01" @default.
- W2133669258 modified "2023-10-14" @default.
- W2133669258 title "Cell death by necrosis: towards a molecular definition" @default.
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- W2133669258 doi "https://doi.org/10.1016/j.tibs.2006.11.001" @default.
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