Animal cells and systems

The Korean Society for Integrative Biology (한국통합생물학회)
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Redox Regulation of Apoptosis before and after Cytochrome C Release

  • Chen, Quan (The National Key Laboratory of Biomembrane and Membrane Biotechnology, Chinese Academy of Sciences) ;
  • Crosby, Meredith (Department of Environmental Health Sciences, Case Western Reserve University) ;
  • Almasan, Alex (Deparment of Cancer Biology, Lerner Research Institute and Department of Radiation, Oncology, The Cleveland Clinic Foundation)
  • Published : 2003.03.01
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Abstract

Programmed cell death, or apoptosis, is one of the most studied areas of modern biology. Apoptosis is a genetically regulated process, which plays an essential role in the development and homeostasis of higher organisms. Mitochondria, known to play a central role in regulating cellular metabolism, was found to be critical for regulating apoptosis induced under both physiological and pathological conditions. Mitochondria are a major source of reactive oxygen species (ROS) but they can also serve as its target during the apoptosis process. Release of apoptogenic factors from mitochondria, the best known of which is cytochrome c, leads to assembly of a large apoptosis-inducing complex called the apoptosome. Cysteine pretenses (called caspases) are recruited to this complex and, following their activation by proteolytic cleavage, activate other caspases, which in turn target for specific cleavage a large number of cellular proteins. The redox regulation of apoptosis during and after cytochrome c release is an area of intense investigation. This review summarizes what is known about the biological role of ROS and its targets in apoptosis with an emphasis on its intricate connections to mitochondria and the basic components of cell death.

Keywords

References

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