Purification of functional mouse skeletal muscle mitochondria using Percoll density gradient centrifugation

Area of Science:

• Mitochondrial Biology
• Cellular Respiration
• Biochemistry

Background:

• Mitochondria are crucial for cellular energy production.
• Efficient isolation of pure, functional mitochondria from skeletal muscle is vital for research.
• Existing methods can be time-consuming and yield impure samples.

Approach:

• Developed a Percoll density gradient method for isolating mitochondria from mouse skeletal muscle.
• Utilized Seahorse XF Analyzer for assessing mitochondrial bioenergetic function.
• Employed mass spectrometry for proteomic analysis to confirm sample purity.

Key Points:

• The Percoll method provides minimally contaminated mitochondrial preparations within 3-4 hours.
• Isolated mitochondria exhibit high functionality, with respiratory control ratios of 3.9-7.1.
• Proteomic analysis confirms significant enrichment of mitochondrial proteins, indicating high purity.

Conclusions:

• This established methodology yields sufficient high-quality mitochondria for downstream analyses.
• The technique is suitable for studies involving mitochondrial bioenergetics and proteomics.
• This method offers a reliable approach for skeletal muscle mitochondrial research.