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Mitochondrial Membrane Potential Assay
Srilatha Sakamuru1, Jinghua Zhao1, Matias S Attene-Ramos2
1National Center for Advancing Translational Sciences, National Institutes of Health, Bethesda, MD, USA.
Abstract:
Mitochondrial function, a key indicator of cell health, can be assessed through monitoring changes in mitochondrial membrane potential (MMP). Cationic fluorescent dyes are commonly used tools to assess MMP. We used a water-soluble mitochondrial membrane potential indicator (m-MPI) to detect changes in MMP in various types of cells, such as HepG2, HepaRG, and AC16 cells. A homogenous cell-based MMP assay has been optimized and performed in a 1536-well plate format, which can be used to screen several compound libraries for mitochondrial toxicity by evaluating the effects of chemical compounds on MMP.
Insights
This study optimized a cell-based assay to measure mitochondrial membrane potential (MMP) in various cell types. This assay effectively screens compounds for mitochondrial toxicity, aiding in cell health assessments.
Area of Science:
- Biochemistry
- Cell Biology
- Toxicology
Background:
- Mitochondrial function is crucial for cell health and is often evaluated by monitoring mitochondrial membrane potential (MMP).
- Cationic fluorescent dyes are standard tools for assessing MMP.
- Assessing MMP provides insights into cellular metabolic state and potential toxicity.
Purpose of the Study:
- To optimize a homogenous cell-based assay for detecting changes in MMP.
- To validate the assay's utility in various cell lines (HepG2, HepaRG, AC16).
- To establish a high-throughput screening method for identifying compounds with mitochondrial toxicity.
Main Methods:
- Utilized a water-soluble mitochondrial membrane potential indicator (m-MPI).
- Developed and optimized a homogenous cell-based assay.
- Performed the assay in a 1536-well plate format for high-throughput screening.
Main Results:
- Successfully detected changes in MMP across different cell types.
- The optimized assay demonstrated robustness and reproducibility.
- The assay is suitable for screening compound libraries for effects on MMP.
Conclusions:
- The developed homogenous cell-based MMP assay is an effective tool for evaluating mitochondrial toxicity.
- This assay facilitates the screening of compound libraries to identify potential mitochondrial toxicants.
- The method supports the assessment of cell health by monitoring mitochondrial function.
