Cited by 205Mitochondrial Function and PathologyCell death mechanisms and regulationCardiac Ischemia and Reperfusion

Mitochondrial Permeability Transition: New Findings and Persisting Uncertainties

Izzo, Valentina, Bravo-San Pedro, José Manuel, Sica, Valentina, Kroemer, Guido, Galluzzi, Lorenzo·2016·Trends in Cell Biology

Abstract

Several insults cause the inner mitochondrial membrane to abruptly lose osmotic homeostasis, hence initiating a regulated variant of cell death known as 'mitochondrial permeability transition' (MPT)-driven necrosis. MPT provides an etiological contribution to several human disorders characterized by the acute loss of post-mitotic cells, including cardiac and cerebral ischemia. Nevertheless, the precise molecular determinants of MPT remain elusive, which considerably hampers the development of clinically implementable cardio- or neuroprotective strategies targeting this process. We summarize recent findings shedding new light on the supramolecular entity that mediates MPT, the so-called 'permeability transition pore complex' (PTPC). Moreover, we discuss hitherto unresolved controversies on MPT and analyze the major obstacles that still preclude the complete understanding and therapeutic targeting of this process.

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Crossref · 10.1016/j.tcb.2016.04.006

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  • MPT-driven necrosis is a form of RCD initiated by specific perturbations of intracellular microenvironment such as severe oxidative stress and cytosolic Ca2+ overload, which generally manifests with necrotic morphotype.

    “MPT-driven necrosis is a form of RCD initiated by specific perturbations of the intracellular microenvironment such as severe oxidative stress and cytosolic Ca2+ overload, which generally manifests with a necrotic morphotype [373, 374].”
  • MPT refers to abrupt loss of impermeability of IMM to small solutes, resulting in rapid Δψm dissipation, osmotic breakdown of both mitochondrial membranes, and RCD.

    “The term MPT refers to an abrupt loss of the impermeability of the IMM to small solutes, resulting in rapid Δψm dissipation, osmotic breakdown of both mitochondrial membranes, and RCD [373, 374].”
  • Several other proteins previously hypothesized to mediate non-redundant role within PTPC turned out to be dispensable for MPT in vivo, based on relatively robust genetic models.

    “At odds with CYPD, several other proteins that had previously been hypothesized to mediate a non-redundant role within the PTPC turned out to be dispensable for MPT in vivo, based on relatively robust genetic models [373].”
  • These results reflect a consistent degree of genetic and functional redundancy among components of molecular machinery for MPT.

    “These results reflect a consistent degree of genetic and functional redundancy among the components of the molecular machinery for MPT [373].”

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Authors
Izzo, V., Bravo-San Pedro, J. M., Sica, V., Kroemer, G., & Galluzzi, L.
Affiliations
  • Inserm (FR)
  • Université Paris-Sud (FR)
  • Karolinska University Hospital (SE)
Corresponding author
  • Kroemer, Guido
  • Galluzzi, Lorenzo
Venue
Trends in Cell Biology
Publisher
Elsevier BV
Published
2016-09
Volume
26
Issue
9
Pages
655-667
ISSN
0962-8924 (ISSN-L)
OpenAlex
W2345712655
Cited by
205
References
79
Citations by year
2026: 6 · 2025: 14 · 2024: 13 · 2023: 24 · 2022: 27 · 2021: 23 · 2020: 20 · 2019: 28 · 2018: 26 · 2017: 18 · 2016: 6
FWCI
2.35
Type
journal article
Language
en
Open access
closed
Locations
  • Trends in Cell Biology (publishedVersion)
  • PubMed (publishedVersion)
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 › Pathology and Forensic Medicine › Cardiac Ischemia and Reperfusion
Keywords
mitochondrial permeability transition, mitochondrial permeability transition pore, regulated cell death, myocardial ischemia, cerebral ischemia, neuroprotection, cardioprotection
MeSH terms
Mitochondrial Permeability Transition Pore, Animals, Humans, Models, Biological, Mitochondrial Diseases, Mitochondrial Membrane Transport Proteins

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