Crossref journal-article
Rockefeller University Press
The Journal of Cell Biology (291)
Abstract

Mitochondrial outer membrane permeabilization by proapoptotic Bcl-2 family proteins, such as Bax, plays a crucial role in apoptosis induction. However, whether this only causes the intracytosolic release of inducers of caspase-dependent death, such as cytochrome c, or also of caspase-independent death, such as apoptosis-inducing factor (AIF) remains unknown. Here, we show that on isolated mitochondria, Bax causes the release of cytochrome c, but not of AIF, and the association of AIF with the mitochondrial inner membrane provides a simple explanation for its lack of release upon Bax-mediated outer membrane permeabilization. In cells overexpressing Bax or treated either with the Bax- or Bak-dependent proapoptotic drugs staurosporine or actinomycin D, or with hydrogen peroxide, caspase inhibitors did not affect the intracytosolic translocation of cytochrome c, but prevented that of AIF. These results provide a paradigm for mitochondria-dependent death pathways in which AIF cannot substitute for caspase executioners because its intracytosolic release occurs downstream of that of cytochrome c.

Bibliography

Arnoult, D., Parone, P., Martinou, J.-C., Antonsson, B., Estaquier, J., & Ameisen, J. C. (2002). Mitochondrial release of apoptosis-inducing factor occurs downstream of cytochrome c release in response to several proapoptotic stimuli. The Journal of Cell Biology, 159(6), 923–929.

Authors 6
  1. Damien Arnoult (first)
  2. Philippe Parone (additional)
  3. Jean-Claude Martinou (additional)
  4. Bruno Antonsson (additional)
  5. Jérôme Estaquier (additional)
  6. Jean Claude Ameisen (additional)
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Dates
Type When
Created 22 years, 8 months ago (Dec. 23, 2002, 2:43 p.m.)
Deposited 2 years, 1 month ago (July 22, 2023, 10:01 a.m.)
Indexed 1 month, 3 weeks ago (July 7, 2025, 1:45 a.m.)
Issued 22 years, 8 months ago (Dec. 16, 2002)
Published 22 years, 8 months ago (Dec. 16, 2002)
Published Online 22 years, 8 months ago (Dec. 16, 2002)
Published Print 22 years, 8 months ago (Dec. 23, 2002)
Funders 0

None

@article{Arnoult_2002, title={Mitochondrial release of apoptosis-inducing factor occurs downstream of cytochrome c release in response to several proapoptotic stimuli}, volume={159}, ISSN={0021-9525}, url={http://dx.doi.org/10.1083/jcb.200207071}, DOI={10.1083/jcb.200207071}, number={6}, journal={The Journal of Cell Biology}, publisher={Rockefeller University Press}, author={Arnoult, Damien and Parone, Philippe and Martinou, Jean-Claude and Antonsson, Bruno and Estaquier, Jérôme and Ameisen, Jean Claude}, year={2002}, month=dec, pages={923–929} }