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Systems Biology of Death Receptor-Induced Apoptosis

  • Kolja Schleich
  • Inna N. LavrikEmail author
Chapter

Abstract

Programmed cell death, termed apoptosis, plays a fundamental role in the development and homeostasis of multicellular organisms. Dysregulation of apoptosis can lead to numerous diseases, including autoimmune diseases, neurodegenerative diseases, and cancer. In mammalian cells apoptosis can be induced by intra- or extracellular stimuli. Extracellular stimuli comprise death ligands which lead to death receptor-induced apoptosis, referred to as extrinsic pathway. Intracellular signals, such as DNA damage, trigger the intrinsic pathway which results in the activation of Bcl-2 proteins and release of proapoptotic factors from the mitochondria into the cytosol. Apoptosis is executed by a family of cysteine proteases, the caspases, which eventually lead to the apoptotic phenotype, such as chromatin condensation, nuclear fragmentation, membrane blebbing, cell shrinkage, and formation of apoptotic bodies. The focus of this chapter is on understanding the signaling complexity of the extrinsic apoptotic pathway using systems biology. We summarize the main signaling paradigms and the major models of the extrinsic pathway. The development of these models has elucidated new insights into the regulation of apoptosis.

Keywords

Initiator Caspases Mitochondrial Outer Membrane Permeabilization Extrinsic Apoptosis Death Effector Domain CD95 Stimulation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

We acknowledge the Helmholtz Alliance on Systems Biology (NW1SBCancer) and Helmholtz-Russia Joint Research Groups-2008-2 for supporting our work.

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Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  1. 1.Division of ImmunogeneticsGerman Cancer Research Center (DKFZ)HeidelbergGermany
  2. 2.BioquantHeidelbergGermany
  3. 3.Department of Translational Inflammation Research, Institute of Experimental Internal MedicineOtto von Guericke UniversityMagdeburgGermany

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