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Mitochondrial Permeability Transition Pore (MPTP)
- Target
- MPTP
- Molecular classification
- Pore, Multi-protein complex, Ion Channel (Non-selective), F-ATP synthase complex
01
Overview
The mitochondrial permeability transition pore (MPTP) is a large conductance channel that forms in the inner mitochondrial membrane under pathological conditions, leading to increased permeability and mitochondrial dysfunction. Its opening can trigger cell death via necrosis or apoptosis. The precise molecular composition remains incompletely defined, but F-ATP synthase is a likely core component. Key regulators include calcium ions, reactive oxygen species, and adenine nucleotides. MPTP plays a central role in ischemia-reperfusion injury, neurodegeneration, and other diseases. Therapeutic targeting is focused on developing selective modulators to inhibit inappropriate activation.
- Other names
- mPTPPTPmTPMTP
02
Mechanism of action
Cyclosporin A inhibits MPTP opening by binding to cyclophilin D.
03
Biological functions
Regulation of mitochondrial membrane permeabilityCalcium effluxApoptosis regulationNecrosis regulationCell death regulationMitochondrial homeostasisEnergy dissipation
04
Disease associations
Ischemia-reperfusion injuryNeurodegenerationHepatotoxicityMuscular dystrophiesReye’s syndrome
05
Safety considerations
Lack of specificity of current inhibitors (e.g., Cyclosporin A)Potential for off-target effects
06
Interacting drugs
Cyclosporin A
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