JCB logo
Quantitative Colocalization Analysis Software
  Home | Help | Feedback | Subscriptions | Archive | Search | Table of Contents

Published online 16 December 2002. doi:10.1083/jcb.200207071
This Article
Right arrow Full Text
Right arrow Full Text (PDF, 657K)
Right arrow PPT slides of all figures
Right arrow Supplemental Material Index
Right arrow Alert me when this article is cited
Right arrow Citation Map
Services
Right arrow Email this article
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new content in the JCB
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Arnoult, D.
Right arrow Articles by Ameisen, J. C.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Arnoult, D.
Right arrow Articles by Ameisen, J. C.
Social Bookmarking
 Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Facebook   Add to Reddit   Add to Technorati   Add to Twitter  
What's this?

© The Rockefeller University Press, 0021-9525/2002/12/923 $5.00
The Journal of Cell Biology, Volume 159, Number 6, 923-929


Report

Mitochondrial release of apoptosis-inducing factor occurs downstream of cytochrome c release in response to several proapoptotic stimuli



Damien Arnoult1, Philippe Parone2, Jean-Claude Martinou2, Bruno Antonsson3, Jérôme Estaquier1 and Jean Claude Ameisen1

1 EMI-U 9922 Institut National de la Santé et de la Recherche Medicale (INSERM)/Université Paris 7, IFR02, AP-HP, CHU Bichat, 75018 Paris, France
2 Department of Cell Biology, University of Geneva, 1211 Geneva 4, Switzerland
3 Serono Pharmaceutical Research Institute, Serono International SA, CH-1228 Plan-les-Ouates, Geneva, Switzerland

Address correspondence to D. Arnoult, National Institutes of Health/National Institute of Neurological Disorders and Stroke, Biochemistry section, Bldg. 10, Rm. 4N258, Bethesda, MD 20892. Tel.: (301) 496-6628. Fax: (301) 402-0380. E-mail: ArnoultD{at}ninds.nih.gov; or J.C. Ameisen, EMI-U 9922 INSERM, Faculté de Médecine Xavier Bichat, 16 rue Henri Huchard, BP 416, 75870 Paris cedex 18, France. Tel.: 33-1-44-85-61-50. Fax: 33-1-44-85-61-49. E-mail: ants{at}club-internet.fr

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.

Key Words: mitochondria; AIF; caspases; Bax; Bid


Add to CiteULike CiteULike   Add to Complore Complore   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg   Add to Facebook Facebook   Add to Reddit Reddit   Add to Technorati Technorati   Add to Twitter Twitter    What's this?


This article has been cited by other articles:



  Home | Help | Feedback | Subscriptions | Archive | Search | Table of Contents