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Updated: Aug 20, 2025

Assessment of Open Probability of the Mitochondrial Permeability Transition Pore in the Setting of Coenzyme Q Excess
Published on: June 1, 2022
Mitochondrial permeability transition pore-dependent necrosis
Dexter J Robichaux1, Mikako Harata2, Elizabeth Murphy2
1Department of Integrative Physiology, Baylor College of Medicine, Houston, TX, USA; Cardiovascular Research Institute, Baylor College of Medicine, Houston, TX, USA.
Abstract:
Mitochondrial permeability transition pore (mPTP)-dependent cell death is a form of necrotic cell death that is driven by mitochondrial dysfunction by the opening of the mPTP and is triggered by increases in matrix levels of Ca2+ and reactive oxygen species. This form of cell death has been implicated in ischemic injuries of the heart and brain as well as numerous degenerative diseases in the brain and skeletal muscle. This review focuses on the molecular triggers and regulators of mPTP-dependent necrosis in the context of myocardial ischemia reperfusion injury. Research over the past 50 years has led to the identity of regulators and putative pore-forming components of the mPTP. Finally, downstream consequences of activation of the mPTP as well as ongoing questions and areas of research are discussed. These questions pose a particular interest as targeting the mPTP could potentially represent an efficacious therapeutic strategy to reduce infarct size following an ischemic event.
Insights
Mitochondrial permeability transition pore (mPTP)-dependent cell death involves mitochondrial dysfunction and is linked to heart and brain injuries. Targeting the mPTP may reduce tissue damage after ischemic events.
Area of Science:
- Biochemistry
- Cell Biology
- Pathology
Background:
- Mitochondrial permeability transition pore (mPTP)-dependent cell death is a necrotic process.
- It is triggered by mitochondrial dysfunction, elevated Ca2+ and reactive oxygen species.
- This cell death pathway is implicated in ischemic injuries and degenerative diseases.
Purpose of the Study:
- To review molecular triggers and regulators of mPTP-dependent necrosis.
- Focus on myocardial ischemia reperfusion injury.
- Discuss downstream consequences and future research directions.
Main Methods:
- Literature review of research over the past 50 years.
- Identification of mPTP regulators and pore-forming components.
- Analysis of downstream effects and therapeutic potential.
Main Results:
- Significant progress in identifying mPTP regulators and components.
- Understanding of molecular triggers and consequences of mPTP opening.
- Potential therapeutic strategies targeting mPTP are emerging.
Conclusions:
- mPTP-dependent cell death is a key mechanism in ischemic injury.
- Targeting the mPTP offers a promising therapeutic avenue.
- Further research is needed to fully elucidate mPTP function and therapeutic applications.
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