Mitochondria Purification
Mitochondria Purification - Related Videos
10:39
Purification of Mitochondria from Yeast Cells
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Cited by 85 •
2009
We describe a rapid and effective method for purification of mitochondria from the yeast Saccharomyces cerevisiae. This method enables the high-yield isolation of pure mitochondria that are essentially free of contamination by other organelles and retain their structural and functional integrity after their purification.
10:35
Rapid Isolation And Purification Of Mitochondria For Transplantation By Tissue Dissociation And Differential Filtration
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Cited by 129 •
2014
A method for rapid isolation of mitochondria from mammalian tissue biopsies is described. Rat liver or skeletal muscle preparations were homogenized with a commercial tissue dissociator and mitochondria were isolated by differential filtration through nylon mesh filters. Mitochondrial isolation time is <30 min compared to 60 - 100 min using alternative methods.
13:42
Multi-parameter Measurement of the Permeability Transition Pore Opening in Isolated Mouse Heart Mitochondria
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Cited by 19 •
2012
A spectrofluorometric protocol for the measurement of the mitochondrial permeability transition pore opening in isolated mouse heart mitochondria is presented here. The assay involves the simultaneous measurement of mitochondria Ca2+ handling, mitochondrial membrane potential and mitochondrial volume. The procedure for obtaining high-quality and functional heart mitochondria is also described.
05:37
Visualization of Mitochondria within Intraepidermal Nerve Fibers
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2025
Source: Hamid, H. S., et al. Three-dimensional Imaging and Analysis of Mitochondria within Human Intraepidermal Nerve Fibers. J. Vis. Exp. (2017) This video demonstrates the method for visualizing nerve-specific mitochondria using three-dimensional imaging. It outlines the process of acquiring sequential scans of pre-labeled intraepidermal nerve fibers and generating 3D surface images to isolate and display mitochondria in relation to nerve structures.
01:37
Mitochondria
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2023
Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
FAQs
Differential centrifugation separates components by sedimentation behavior during successive spins. A low-speed centrifugation step removes unbroken cells and nuclei, whereas a higher-speed step pellets mitochondria. This staged separation enriches the target organelles before further analysis, while preserving a workflow that can be adapted to different cell or tissue preparations.
Density-gradient centrifugation improves separation by using differences in buoyant density, the density at which an organelle moves within a gradient. Mitochondria can therefore be separated from remaining organelles more selectively than with differential centrifugation alone. This additional step is especially relevant when downstream measurements require a preparation with improved purity.
Gentle disruption releases mitochondria while supporting their subsequent biochemical, structural, and functional examination. Evaluating the preparation through only one type of measurement provides limited information. Measuring mitochondrial markers, morphology, and respiratory activity instead offers complementary evidence about the preparation's enrichment and condition before researchers interpret experimental results.
A typical workflow starts with gentle disruption of cells or tissue, followed by low-speed centrifugation to remove unbroken cells and nuclei. The resulting material undergoes higher-speed centrifugation to collect mitochondria. When greater purity is needed, density-gradient centrifugation is added before evaluating markers, morphology, or respiratory activity.
Purified mitochondria provide material for examining oxidative phosphorylation, electron transport, and metabolite transport in a more focused preparation. They also support studies of apoptosis, mitochondrial disease, proteomics, enzymatic activity, and drug responses. These applications connect organelle-level measurements with biochemical mechanisms and functional changes relevant to biology.
Structural analyses can use mitochondrial morphology, whereas functional studies can examine respiratory activity and related processes. Biochemical work can measure mitochondrial markers or enzymatic behavior, and proteomic analyses can characterize associated molecular components. Using these complementary readouts helps researchers interpret whether observed effects reflect organelle structure, function, or composition.