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[Mitochondria from rat brain purified by partition in biphases]
Revista Espanola De Fisiologia
|January 1, 1982
Summary
This study presents a novel method for isolating highly pure rat brain mitochondria using poly(ethylene glycol)-Dextran two-phase systems. The isolated mitochondria exhibit excellent respiratory function and minimal synaptosome contamination, offering a superior preparation for neuroscience research.
Area of Science:
- Neuroscience
- Cell Biology
- Biochemistry
Background:
- Mitochondria are crucial for cellular energy production.
- Synaptosomes are important for neurotransmission.
- Purity of isolated mitochondria is essential for accurate biochemical analysis.
Purpose of the Study:
- To develop a highly efficient method for isolating pure rat brain mitochondria.
- To assess the purity and respiratory function of isolated mitochondria.
- To minimize synaptosome contamination in mitochondrial preparations.
Main Methods:
- Separation of rat brain mitochondria and synaptosomes using poly(ethylene glycol)-Dextran two-phase partitioning.
- Assessment of mitochondrial purity via lactate dehydrogenase and acetylcholinesterase activity assays.
- Measurement of respiratory activity in isolated mitochondria.
Main Results:
- The poly(ethylene glycol)-Dextran method effectively separated mitochondria from synaptosomes.
- Isolated mitochondria demonstrated low synaptosome contamination and high purity.
- Mitochondria exhibited robust respiratory activity, further enhanced by exogenous potassium in potassium-depleted media.
Conclusions:
- Poly(ethylene glycol)-Dextran partitioning is a highly effective technique for isolating pure rat brain mitochondria.
- This method yields mitochondrial preparations with superior purity and respiratory function compared to existing techniques.
- The enhanced purity and function of these mitochondria make them ideal for detailed biochemical and physiological studies in neuroscience.