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Mitochondrial intermembrane proteins in cell death.

Maria van Gurp1, Nele Festjens, Geert van Loo

  • 1Molecular Signaling and Cell Death Unit, Department of Molecular Biomedical Research, VIB and Ghent University, K.L. Ledeganckstraat 35, B-9000 Ghent, Belgium.

Biochemical and Biophysical Research Communications
|May 6, 2003
PubMed
Summary
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Mitochondria play a key role in programmed cell death (apoptosis) by releasing factors like cytochrome c. This review examines conserved and evolved mitochondrial factors in apoptosis across organisms.

Area of Science:

  • Cell Biology
  • Biochemistry
  • Evolutionary Biology

Background:

  • Apoptosis is programmed cell death crucial for multicellular organism development and tissue homeostasis.
  • Mitochondria are central to apoptosis, releasing apoptogenic factors from the intermembrane space upon cellular dysfunction.
  • These factors orchestrate organized cell demise through both intrinsic and extrinsic pathways.

Purpose of the Study:

  • To review the roles of key mitochondrial factors in initiating and modulating apoptosis.
  • To explore the evolutionary conservation and acquisition of apoptogenic functions.
  • To discuss the involvement of these factors in caspase-dependent and independent cell death.

Main Methods:

  • Literature review focusing on mitochondrial apoptotic factors.

Related Experiment Videos

  • Comparative analysis of factor conservation across different model organisms.
  • Examination of molecular mechanisms in caspase-dependent and independent apoptosis.

    • Main Results:

    • Identified conserved factors (AIF, endonuclease G) and those with evolved roles (cytochrome c).
    • Detailed the functions of cytochrome c, AIF, endonuclease G, Smac/DIABLO, Omi/HtrA2, ACBP, and PTBP.
    • Highlighted the contribution of these factors to diverse apoptotic pathways.

    Conclusions:

    • Mitochondrial factors are critical regulators of apoptosis, with diverse evolutionary origins.
    • These factors mediate both caspase-dependent and caspase-independent cell death.
    • Understanding these pathways is vital for comprehending development, homeostasis, and disease.