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Updated: Aug 24, 2026
Detection of Mitochondria Membrane Potential to Study CLIC4 Knockdown-induced HN4 Cell Apoptosis In Vitro
Published on: July 17, 2018
Methods to measure membrane potential and permeability transition in the mitochondria during apoptosis
Naoufal Zamzami1, Guido Kroemer
1Centre National de la Recherche Scientifique, UMR 1599, Institut Gustave Roussy, Villejuif, France.
Abstract:
Mitochondrial membrane permeabilization (MMP) constitutes an early event of the apoptotic process. MMP affects both mitochondrial membranes. Inner MMP leads to the dissipation of the inner transmembrane potential and outer MMP culminates in the efflux of apoptogenic factors. The exact molecular mechanisms of MMP are still controversial. A growing body of data suggests that the cell death regulatory activity of Bcl-2 family members depends, at least in some instances, on their ability to modulate the opening of the mitochondrial permeability transition pore complex. Here, we will detail some experimental protocols designed to measure mitochondrial membrane potential and permeability transition, either in intact cells or in isolated mitochondria.
Insights
Mitochondrial membrane permeabilization (MMP) is key in apoptosis, affecting both mitochondrial membranes. This study details methods to measure MMP and mitochondrial permeability transition in cells and isolated mitochondria.
Area of Science:
- Cell Biology
- Biochemistry
- Molecular Biology
Background:
- Mitochondrial membrane permeabilization (MMP) is an early event in apoptosis.
- MMP involves both inner and outer mitochondrial membranes, leading to potential dissipation and factor efflux.
- The precise molecular mechanisms of MMP are still under investigation.
Purpose of the Study:
- To detail experimental protocols for measuring mitochondrial membrane potential.
- To describe methods for assessing mitochondrial permeability transition.
- To provide tools for studying MMP in both intact cells and isolated mitochondria.
Main Methods:
- Measurement of mitochondrial membrane potential.
- Assessment of mitochondrial permeability transition.
- Protocols applicable to intact cells and isolated mitochondria.
Main Results:
- Detailed experimental protocols are provided.
- Methods allow for the study of MMP in different biological contexts.
- The protocols facilitate research into the role of Bcl-2 family proteins in MMP.
Conclusions:
- Accurate measurement of MMP is crucial for understanding apoptosis.
- The described methods offer valuable tools for researchers in cell death studies.
- Further investigation into MMP mechanisms, particularly involving Bcl-2 family proteins, is warranted.
