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Mitochondrial outer-membrane permeabilization and remodelling in apoptosis

Alexis Jourdain1, Jean-Claude Martinou

  • 1Department of Cell Biology, University of Geneva, Quai Ernest-Ansermet 30, 1211 Geneva 4, Switzerland.

The International Journal of Biochemistry & Cell Biology
|May 15, 2009
PubMed

Insights

Mitochondrial fission, regulated by Bcl-2 family proteins, may trigger outer mitochondrial membrane permeabilization (MOMP). This process is crucial for programmed cell death and implicated in various human diseases.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Pathology

Background:

  • Mitochondria are vital organelles involved in energy production, metabolism, and cell death.
  • Defects in mitochondria are linked to diseases like diabetes, neurodegeneration, and cancer.
  • The intrinsic apoptotic pathway involves outer mitochondrial membrane permeabilization (MOMP) mediated by Bax and Bak, releasing cytochrome c.

Purpose of the Study:

  • To explore the potential link between mitochondrial fission and outer mitochondrial membrane permeabilization (MOMP).
  • To review the roles of mitochondrial fission/fusion machinery and Bcl-2 family members in MOMP.

Main Methods:

  • This is a review article, synthesizing existing research.
  • Discussion focuses on the interplay between mitochondrial dynamics and apoptosis.

Main Results:

  • Mitochondrial fragmentation, driven by Drp-1 activation, is observed during MOMP.
  • This suggests a functional connection between mitochondrial fission and the initiation of apoptosis.

Conclusions:

  • Mitochondrial fission machinery and Bcl-2 family proteins are key players in MOMP.
  • Understanding this link is critical for deciphering mitochondrial roles in human pathologies.

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