Cited by 472Mitochondrial Function and PathologyCell death mechanisms and regulationAutophagy in Disease and Therapy

The Mitochondrial Permeability Transition, Release of Cytochrome c and Cell Death

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Petronilli, Valeria, Penzo, Daniele, Scorrano, Luca, Bernardi, Paolo, Di Lisa, Fabio·2001·Journal of Biological Chemistry

Abstract

We investigated the relationship between opening of the permeability transition pore (PTP), mitochondrial depolarization, cytochrome c release, and occurrence of cell death in rat hepatoma MH1C1 cells. Treatment with arachidonic acid or induces PTP opening in situ with similar kinetics, as assessed by the calcein loading-Co(2+) quenching technique (Petronilli, V., Miotto, G., Canton, M., Colonna, R., Bernardi, P., and Di Lisa, F. (1999) Biophys. J. 76, 725-734). Yet depolarization, as assessed from the changes of mitochondrial tetramethylrhodamine methyl ester (TMRM) fluorescence, is rapid and extensive with arachidonic acid and slow and partial with. Cyclosporin A-inhibitable release of cytochrome c and cell death correlate with the changes of TMRM fluorescence but not with those of calcein fluorescence. Since pore opening must be accompanied by depolarization, we conclude that short PTP openings are detected only by trapped calcein and may have little impact on cell viability, while changes of TMRM distribution require longer PTP openings, which cause release of cytochrome c and may result in cell death. Modulation of the open time appears to be the key element in determining the outcome of stimuli that converge on the PTP.

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Authors
Petronilli, V., Penzo, D., Scorrano, L., Bernardi, P., & Di Lisa, F.
Affiliations
University of Padua (IT)
Corresponding author
  • Petronilli, Valeria
  • Bernardi, Paolo
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2001-04
Volume
276
Issue
15
Pages
12030-12034
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1976348423
Cited by
472
References
43
Citations by year
2026: 7 · 2025: 10 · 2024: 11 · 2023: 10 · 2022: 7 · 2021: 16 · 2020: 23 · 2019: 10 · 2018: 20 · 2017: 16 · 2016: 17 · 2015: 15 · 2014: 29 · 2013: 18 · 2012: 19
FWCI
10.36
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Padua Research Archive (University of Padova) (submittedVersion)
  • INFM-OAR (INFN Catania) (submittedVersion, cc-by)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
Keywords
mitochondrial permeability transition, mitochondrial permeability transition pore, cytochrome c release, mitochondrial depolarization, cell death, arachidonic acid, cyclosporine, hepatoma cells, calcein fluorescence
MeSH terms
Calcimycin, Animals, Carbonyl Cyanide p-Trifluoromethoxyphenylhydrazone, Cell Membrane Permeability, Cytochrome c Group, Liver Neoplasms, Experimental, Mitochondria, Liver, Tumor Cells, Cultured, Arachidonic Acid, Apoptosis, Rats

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